Merge tag 's390-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Vasily Gorbik:

- Add sorting of mcount locations at build time

- Rework uaccess functions with C exception handling to shorten inline
assembly size and enable full inlining. This yields near-optimal code
for small constant copies with a ~40kb kernel size increase

- Add support for a configurable STRICT_MM_TYPECHECKS which allows to
generate better code, but also allows to have type checking for debug
builds

- Optimize get_lowcore() for common callers with alternatives that
nearly revert to the pre-relocated lowcore code, while also slightly
reducing syscall entry and exit time

- Convert MACHINE_HAS_* checks for single facility tests into cpu_has_*
style macros that call test_facility(), and for features with
additional conditions, add a new ALT_TYPE_FEATURE alternative to
provide a static branch via alternative patching. Also, move machine
feature detection to the decompressor for early patching and add
debugging functionality to easily show which alternatives are patched

- Add exception table support to early boot / startup code to get rid
of the open coded exception handling

- Use asm_inline for all inline assemblies with EX_TABLE or ALTERNATIVE
to ensure correct inlining and unrolling decisions

- Remove 2k page table leftovers now that s390 has been switched to
always allocate 4k page tables

- Split kfence pool into 4k mappings in arch_kfence_init_pool() and
remove the architecture-specific kfence_split_mapping()

- Use READ_ONCE_NOCHECK() in regs_get_kernel_stack_nth() to silence
spurious KASAN warnings from opportunistic ftrace argument tracing

- Force __atomic_add_const() variants on s390 to always return void,
ensuring compile errors for improper usage

- Remove s390's ioremap_wt() and pgprot_writethrough() due to
mismatched semantics and lack of known users, relying on asm-generic
fallbacks

- Signal eventfd in vfio-ap to notify userspace when the guest AP
configuration changes, including during mdev removal

- Convert mdev_types from an array to a pointer in vfio-ccw and vfio-ap
drivers to avoid fake flex array confusion

- Cleanup trap code

- Remove references to the outdated [e-mail] address

- Other various small fixes and improvements all over the code

* tag 's390-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (78 commits)
s390: Use inline qualifier for all EX_TABLE and ALTERNATIVE inline assemblies
s390/kfence: Split kfence pool into 4k mappings in arch_kfence_init_pool()
s390/ptrace: Avoid KASAN false positives in regs_get_kernel_stack_nth()
s390/boot: Ignore vmlinux.map
s390/sysctl: Remove "vm/allocate_pgste" sysctl
s390: Remove 2k vs 4k page table leftovers
s390/tlb: Use mm_has_pgste() instead of mm_alloc_pgste()
s390/lowcore: Use lghi instead llilh to clear register
s390/syscall: Merge __do_syscall() and do_syscall()
s390/spinlock: Implement SPINLOCK_LOCKVAL with inline assembly
s390/smp: Implement raw_smp_processor_id() with inline assembly
s390/current: Implement current with inline assembly
s390/lowcore: Use inline qualifier for get_lowcore() inline assembly
s390: Move s390 sysctls into their own file under arch/s390
s390/syscall: Simplify syscall_get_arguments()
s390/vfio-ap: Notify userspace that guest's AP config changed when mdev removed
s390: Remove ioremap_wt() and pgprot_writethrough()
s390/mm: Add configurable STRICT_MM_TYPECHECKS
s390/mm: Convert pgste_val() into function
s390/mm: Convert pgprot_val() into function
...

arch/s390/Kconfig

···
 	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
 	select ALTERNATE_USER_ADDRESS_SPACE
 	select ARCH_32BIT_USTAT_F_TINODE
-	select ARCH_BINFMT_ELF_STATE
 	select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE
 	select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM
 	select ARCH_ENABLE_MEMORY_HOTREMOVE
···
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
 	select HAVE_ARCH_VMAP_STACK
 	select HAVE_ASM_MODVERSIONS
+	select HAVE_BUILDTIME_MCOUNT_SORT
 	select HAVE_CMPXCHG_DOUBLE
 	select HAVE_CMPXCHG_LOCAL
 	select HAVE_DEBUG_KMEMLEAK

arch/s390/Kconfig.debug

···
 
 	  If unsure, say N.
 
+config STRICT_MM_TYPECHECKS
+	bool "Strict Memory Management Type Checks"
+	depends on DEBUG_KERNEL
+	help
+	  Enable strict type checking for memory management types like pte_t
+	  and pmd_t. This generates slightly worse code and should be used
+	  for debug builds.
+
+	  If unsure, say N.
+
 config CIO_INJECT
 	bool "CIO Inject interfaces"
 	depends on DEBUG_KERNEL && DEBUG_FS

arch/s390/boot/.gitignore

···
 section_cmp.*
 vmlinux
 vmlinux.lds
+vmlinux.map
 vmlinux.syms

arch/s390/boot/Makefile

···
 
 obj-y	:= head.o als.o startup.o physmem_info.o ipl_parm.o ipl_report.o vmem.o
 obj-y	+= string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
-obj-y	+= version.o pgm_check_info.o ctype.o ipl_data.o relocs.o alternative.o
+obj-y	+= version.o pgm_check.o ctype.o ipl_data.o relocs.o alternative.o
 obj-y	+= uv.o printk.o
 obj-$(CONFIG_RANDOMIZE_BASE)	+= kaslr.o
 obj-y	+= $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o

arch/s390/boot/alternative.c

···
 // SPDX-License-Identifier: GPL-2.0
+#define boot_fmt(fmt)	"alt: " fmt
+#include "boot.h"
+
+#define a_debug		boot_debug
 
 #include "../kernel/alternative.c"
+
+static void alt_debug_all(int type)
+{
+	int i;
+
+	switch (type) {
+	case ALT_TYPE_FACILITY:
+		for (i = 0; i < ARRAY_SIZE(alt_debug.facilities); i++)
+			alt_debug.facilities[i] = -1UL;
+		break;
+	case ALT_TYPE_FEATURE:
+		for (i = 0; i < ARRAY_SIZE(alt_debug.mfeatures); i++)
+			alt_debug.mfeatures[i] = -1UL;
+		break;
+	case ALT_TYPE_SPEC:
+		alt_debug.spec = 1;
+		break;
+	}
+}
+
+static void alt_debug_modify(int type, unsigned int nr, bool clear)
+{
+	switch (type) {
+	case ALT_TYPE_FACILITY:
+		if (clear)
+			__clear_facility(nr, alt_debug.facilities);
+		else
+			__set_facility(nr, alt_debug.facilities);
+		break;
+	case ALT_TYPE_FEATURE:
+		if (clear)
+			__clear_machine_feature(nr, alt_debug.mfeatures);
+		else
+			__set_machine_feature(nr, alt_debug.mfeatures);
+		break;
+	}
+}
+
+static char *alt_debug_parse(int type, char *str)
+{
+	unsigned long val, endval;
+	char *endp;
+	bool clear;
+	int i;
+
+	if (*str == ':') {
+		str++;
+	} else {
+		alt_debug_all(type);
+		return str;
+	}
+	clear = false;
+	if (*str == '!') {
+		alt_debug_all(type);
+		clear = true;
+		str++;
+	}
+	while (*str) {
+		val = simple_strtoull(str, &endp, 0);
+		if (str == endp)
+			break;
+		str = endp;
+		if (*str == '-') {
+			str++;
+			endval = simple_strtoull(str, &endp, 0);
+			if (str == endp)
+				break;
+			str = endp;
+			while (val <= endval) {
+				alt_debug_modify(type, val, clear);
+				val++;
+			}
+		} else {
+			alt_debug_modify(type, val, clear);
+		}
+		if (*str != ',')
+			break;
+		str++;
+	}
+	return str;
+}
+
+/*
+ * Use debug-alternative command line parameter for debugging:
+ * "debug-alternative"
+ *  -> print debug message for every single alternative
+ *
+ * "debug-alternative=0;2"
+ * -> print debug message for all alternatives with type 0 and 2
+ *
+ * "debug-alternative=0:0-7"
+ * -> print debug message for all alternatives with type 0 and with
+ *    facility numbers within the range of 0-7
+ *    (if type 0 is ALT_TYPE_FACILITY)
+ *
+ * "debug-alternative=0:!8;1"
+ * -> print debug message for all alternatives with type 0, for all
+ *    facility number, except facility 8, and in addition print all
+ *    alternatives with type 1
+ */
+void alt_debug_setup(char *str)
+{
+	unsigned long type;
+	char *endp;
+	int i;
+
+	if (!str) {
+		alt_debug_all(ALT_TYPE_FACILITY);
+		alt_debug_all(ALT_TYPE_FEATURE);
+		alt_debug_all(ALT_TYPE_SPEC);
+		return;
+	}
+	while (*str) {
+		type = simple_strtoull(str, &endp, 0);
+		if (str == endp)
+			break;
+		str = endp;
+		switch (type) {
+		case ALT_TYPE_FACILITY:
+		case ALT_TYPE_FEATURE:
+			str = alt_debug_parse(type, str);
+			break;
+		case ALT_TYPE_SPEC:
+			alt_debug_all(ALT_TYPE_SPEC);
+			break;
+		}
+		if (*str != ';')
+			break;
+		str++;
+	}
+}

arch/s390/boot/boot.h

···
 #include <linux/printk.h>
 #include <asm/physmem_info.h>
 
-struct machine_info {
-	unsigned char has_edat1 : 1;
-	unsigned char has_edat2 : 1;
-};
-
 struct vmlinux_info {
 	unsigned long entry;
 	unsigned long image_size;	/* does not include .bss */
···
 void verify_facilities(void);
 void print_missing_facilities(void);
 void sclp_early_setup_buffer(void);
-void print_pgm_check_info(void);
+void alt_debug_setup(char *str);
+void do_pgm_check(struct pt_regs *regs);
 unsigned long randomize_within_range(unsigned long size, unsigned long align,
 				     unsigned long min, unsigned long max);
 void setup_vmem(unsigned long kernel_start, unsigned long kernel_end, unsigned long asce_limit);

arch/s390/boot/head.S

···
 	xc	0xf00(256),0xf00
 	larl	%r13,.Lctl
 	lctlg	%c0,%c15,0(%r13)	# load control registers
-	stcke	__LC_BOOT_CLOCK
-	mvc	__LC_LAST_UPDATE_CLOCK(8),__LC_BOOT_CLOCK+1
+	larl	%r13,tod_clock_base
+	stcke	0(%r13)
+	mvc	__LC_LAST_UPDATE_CLOCK(8),1(%r13)
 	larl	%r13,6f
 	spt	0(%r13)
 	mvc	__LC_LAST_UPDATE_TIMER(8),0(%r13)
···
 
 #include "head_kdump.S"
 
-#
-# This program check is active immediately after kernel start
-# and until early_pgm_check_handler is set in kernel/early.c
-# It simply saves general/control registers and psw in
-# the save area and does disabled wait with a faulty address.
-#
 SYM_CODE_START_LOCAL(startup_pgm_check_handler)
 	stmg	%r8,%r15,__LC_SAVE_AREA
 	la	%r8,4095
···
 	oi	__LC_RETURN_PSW+1,0x2	# set wait state bit
 	larl	%r9,.Lold_psw_disabled_wait
 	stg	%r9,__LC_PGM_NEW_PSW+8
-	larl	%r15,_dump_info_stack_end-STACK_FRAME_OVERHEAD
-	brasl	%r14,print_pgm_check_info
+	larl	%r15,_dump_info_stack_end-(STACK_FRAME_OVERHEAD+__PT_SIZE)
+	la	%r2,STACK_FRAME_OVERHEAD(%r15)
+	mvc	__PT_PSW(16,%r2),__LC_PSW_SAVE_AREA-4095(%r8)
+	mvc	__PT_R0(128,%r2),__LC_GPREGS_SAVE_AREA-4095(%r8)
+	mvc	__PT_LAST_BREAK(8,%r2),__LC_PGM_LAST_BREAK
+	mvc	__PT_INT_CODE(4,%r2),__LC_PGM_INT_CODE
+	brasl	%r14,do_pgm_check
+	larl	%r9,startup_pgm_check_handler
+	stg	%r9,__LC_PGM_NEW_PSW+8
+	mvc	__LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
+	lmg	%r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
+	lpswe	__LC_RETURN_PSW
 .Lold_psw_disabled_wait:
 	la	%r8,4095
 	lmg	%r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r8)

arch/s390/boot/ipl_parm.c

···
 #include <linux/pgtable.h>
 #include <asm/abs_lowcore.h>
 #include <asm/page-states.h>
+#include <asm/machine.h>
 #include <asm/ebcdic.h>
 #include <asm/sclp.h>
 #include <asm/sections.h>
···
 
 static inline int __diag308(unsigned long subcode, void *addr)
 {
-	unsigned long reg1, reg2;
-	union register_pair r1;
-	psw_t old;
+	union register_pair r1 = { .even = (unsigned long)addr, .odd = 0 };
 
-	r1.even = (unsigned long) addr;
-	r1.odd	= 0;
-	asm volatile(
-		"	mvc	0(16,%[psw_old]),0(%[psw_pgm])\n"
-		"	epsw	%[reg1],%[reg2]\n"
-		"	st	%[reg1],0(%[psw_pgm])\n"
-		"	st	%[reg2],4(%[psw_pgm])\n"
-		"	larl	%[reg1],1f\n"
-		"	stg	%[reg1],8(%[psw_pgm])\n"
+	asm_inline volatile(
 		"	diag	%[r1],%[subcode],0x308\n"
-		"1:	mvc	0(16,%[psw_pgm]),0(%[psw_old])\n"
-		: [r1] "+&d" (r1.pair),
-		  [reg1] "=&d" (reg1),
-		  [reg2] "=&a" (reg2),
-		  "+Q" (get_lowcore()->program_new_psw),
-		  "=Q" (old)
-		: [subcode] "d" (subcode),
-		  [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&get_lowcore()->program_new_psw)
+		"0:\n"
+		EX_TABLE(0b, 0b)
+		: [r1] "+d" (r1.pair)
+		: [subcode] "d" (subcode)
 		: "cc", "memory");
 	return r1.odd;
 }
···
 		if (!strcmp(param, "facilities") && val)
 			modify_fac_list(val);
 
+		if (!strcmp(param, "debug-alternative"))
+			alt_debug_setup(val);
+
 		if (!strcmp(param, "nokaslr"))
 			__kaslr_enabled = 0;
 
···
 		}
 #endif
 		if (!strcmp(param, "relocate_lowcore") && test_facility(193))
-			relocate_lowcore = 1;
+			set_machine_feature(MFEATURE_LOWCORE);
 		if (!strcmp(param, "earlyprintk"))
 			boot_earlyprintk = true;
 		if (!strcmp(param, "debug"))

arch/s390/boot/pgm_check_info.c arch/s390/boot/pgm_check.c

···
 	}
 }
 
-void print_pgm_check_info(void)
-{
-	unsigned long *gpregs = (unsigned long *)get_lowcore()->gpregs_save_area;
-	struct psw_bits *psw = &psw_bits(get_lowcore()->psw_save_area);
+extern struct exception_table_entry __start___ex_table[];
+extern struct exception_table_entry __stop___ex_table[];
 
+static inline unsigned long extable_insn(const struct exception_table_entry *x)
+{
+	return (unsigned long)&x->insn + x->insn;
+}
+
+static bool ex_handler(struct pt_regs *regs)
+{
+	const struct exception_table_entry *ex;
+
+	for (ex = __start___ex_table; ex < __stop___ex_table; ex++) {
+		if (extable_insn(ex) != regs->psw.addr)
+			continue;
+		if (ex->type != EX_TYPE_FIXUP)
+			return false;
+		regs->psw.addr = extable_fixup(ex);
+		return true;
+	}
+	return false;
+}
+
+void do_pgm_check(struct pt_regs *regs)
+{
+	struct psw_bits *psw = &psw_bits(regs->psw);
+	unsigned long *gpregs = regs->gprs;
+
+	if (ex_handler(regs))
+		return;
 	if (bootdebug)
 		boot_rb_dump();
 	boot_emerg("Linux version %s\n", kernel_version);
 	if (!is_prot_virt_guest() && early_command_line[0])
 		boot_emerg("Kernel command line: %s\n", early_command_line);
 	boot_emerg("Kernel fault: interruption code %04x ilc:%d\n",
-		   get_lowcore()->pgm_code, get_lowcore()->pgm_ilc >> 1);
+		   regs->int_code & 0xffff, regs->int_code >> 17);
 	if (kaslr_enabled()) {
 		boot_emerg("Kernel random base: %lx\n", __kaslr_offset);
 		boot_emerg("Kernel random base phys: %lx\n", __kaslr_offset_phys);
 	}
 	boot_emerg("PSW : %016lx %016lx (%pS)\n",
-		   get_lowcore()->psw_save_area.mask,
-		   get_lowcore()->psw_save_area.addr,
-		   (void *)get_lowcore()->psw_save_area.addr);
+		   regs->psw.mask, regs->psw.addr, (void *)regs->psw.addr);
 	boot_emerg("      R:%x T:%x IO:%x EX:%x Key:%x M:%x W:%x P:%x AS:%x CC:%x PM:%x RI:%x EA:%x\n",
 		   psw->per, psw->dat, psw->io, psw->ext, psw->key, psw->mcheck,
 		   psw->wait, psw->pstate, psw->as, psw->cc, psw->pm, psw->ri, psw->eaba);
···
 	boot_emerg("      %016lx %016lx %016lx %016lx\n", gpregs[4], gpregs[5], gpregs[6], gpregs[7]);
 	boot_emerg("      %016lx %016lx %016lx %016lx\n", gpregs[8], gpregs[9], gpregs[10], gpregs[11]);
 	boot_emerg("      %016lx %016lx %016lx %016lx\n", gpregs[12], gpregs[13], gpregs[14], gpregs[15]);
-	print_stacktrace(get_lowcore()->gpregs_save_area[15]);
+	print_stacktrace(gpregs[15]);
 	boot_emerg("Last Breaking-Event-Address:\n");
-	boot_emerg(" [<%016lx>] %pS\n", (unsigned long)get_lowcore()->pgm_last_break,
-		   (void *)get_lowcore()->pgm_last_break);
+	boot_emerg(" [<%016lx>] %pS\n", regs->last_break, (void *)regs->last_break);
+	/* Convert to disabled wait PSW */
+	psw->io = 0;
+	psw->ext = 0;
+	psw->wait = 1;
 }

arch/s390/boot/physmem_info.c

···
 
 static int __diag260(unsigned long rx1, unsigned long rx2)
 {
-	unsigned long reg1, reg2, ry;
 	union register_pair rx;
 	int cc, exception;
-	psw_t old;
+	unsigned long ry;
 
 	rx.even = rx1;
 	rx.odd	= rx2;
 	ry = 0x10; /* storage configuration */
 	exception = 1;
-	asm volatile(
-		"	mvc	0(16,%[psw_old]),0(%[psw_pgm])\n"
-		"	epsw	%[reg1],%[reg2]\n"
-		"	st	%[reg1],0(%[psw_pgm])\n"
-		"	st	%[reg2],4(%[psw_pgm])\n"
-		"	larl	%[reg1],1f\n"
-		"	stg	%[reg1],8(%[psw_pgm])\n"
+	asm_inline volatile(
 		"	diag	%[rx],%[ry],0x260\n"
-		"	lhi	%[exc],0\n"
-		"1:	mvc	0(16,%[psw_pgm]),0(%[psw_old])\n"
+		"0:	lhi	%[exc],0\n"
+		"1:\n"
 		CC_IPM(cc)
-		: CC_OUT(cc, cc),
-		  [exc] "+d" (exception),
-		  [reg1] "=&d" (reg1),
-		  [reg2] "=&a" (reg2),
-		  [ry] "+&d" (ry),
-		  "+Q" (get_lowcore()->program_new_psw),
-		  "=Q" (old)
-		: [rx] "d" (rx.pair),
-		  [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&get_lowcore()->program_new_psw)
+		EX_TABLE(0b, 1b)
+		: CC_OUT(cc, cc), [exc] "+d" (exception), [ry] "+d" (ry)
+		: [rx] "d" (rx.pair)
 		: CC_CLOBBER_LIST("memory"));
 	cc = exception ? -1 : CC_TRANSFORM(cc);
 	return cc == 0 ? ry : -1;
···
 static int diag500_storage_limit(unsigned long *max_physmem_end)
 {
 	unsigned long storage_limit;
-	unsigned long reg1, reg2;
-	psw_t old;
 
-	asm volatile(
-		"	mvc	0(16,%[psw_old]),0(%[psw_pgm])\n"
-		"	epsw	%[reg1],%[reg2]\n"
-		"	st	%[reg1],0(%[psw_pgm])\n"
-		"	st	%[reg2],4(%[psw_pgm])\n"
-		"	larl	%[reg1],1f\n"
-		"	stg	%[reg1],8(%[psw_pgm])\n"
-		"	lghi	1,%[subcode]\n"
-		"	lghi	2,0\n"
-		"	diag	2,4,0x500\n"
-		"1:	mvc	0(16,%[psw_pgm]),0(%[psw_old])\n"
-		"	lgr	%[slimit],2\n"
-		: [reg1] "=&d" (reg1),
-		  [reg2] "=&a" (reg2),
-		  [slimit] "=d" (storage_limit),
-		  "=Q" (get_lowcore()->program_new_psw),
-		  "=Q" (old)
-		: [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&get_lowcore()->program_new_psw),
-		  [subcode] "i" (DIAG500_SC_STOR_LIMIT)
+	asm_inline volatile(
+		"	lghi	%%r1,%[subcode]\n"
+		"	lghi	%%r2,0\n"
+		"	diag	%%r2,%%r4,0x500\n"
+		"0:	lgr	%[slimit],%%r2\n"
+		EX_TABLE(0b, 0b)
+		: [slimit] "=d" (storage_limit)
+		: [subcode] "i" (DIAG500_SC_STOR_LIMIT)
 		: "memory", "1", "2");
 	if (!storage_limit)
 		return -EINVAL;
···
 
 static int tprot(unsigned long addr)
 {
-	unsigned long reg1, reg2;
 	int cc, exception;
-	psw_t old;
 
 	exception = 1;
-	asm volatile(
-		"	mvc	0(16,%[psw_old]),0(%[psw_pgm])\n"
-		"	epsw	%[reg1],%[reg2]\n"
-		"	st	%[reg1],0(%[psw_pgm])\n"
-		"	st	%[reg2],4(%[psw_pgm])\n"
-		"	larl	%[reg1],1f\n"
-		"	stg	%[reg1],8(%[psw_pgm])\n"
+	asm_inline volatile(
 		"	tprot	0(%[addr]),0\n"
-		"	lhi	%[exc],0\n"
-		"1:	mvc	0(16,%[psw_pgm]),0(%[psw_old])\n"
+		"0:	lhi	%[exc],0\n"
+		"1:\n"
 		CC_IPM(cc)
-		: CC_OUT(cc, cc),
-		  [exc] "+d" (exception),
-		  [reg1] "=&d" (reg1),
-		  [reg2] "=&a" (reg2),
-		  "=Q" (get_lowcore()->program_new_psw.addr),
-		  "=Q" (old)
-		: [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&get_lowcore()->program_new_psw),
-		  [addr] "a" (addr)
+		EX_TABLE(0b, 1b)
+		: CC_OUT(cc, cc), [exc] "+d" (exception)
+		: [addr] "a" (addr)
 		: CC_CLOBBER_LIST("memory"));
 	cc = exception ? -EFAULT : CC_TRANSFORM(cc);
 	return cc;

arch/s390/boot/printk.c

···
 #include <asm/sections.h>
 #include <asm/lowcore.h>
 #include <asm/setup.h>
+#include <asm/timex.h>
 #include <asm/sclp.h>
 #include <asm/uv.h>
 #include "boot.h"
···
 static char *add_timestamp(char *buf)
 {
 #ifdef CONFIG_PRINTK_TIME
-	union tod_clock *boot_clock = (union tod_clock *)&get_lowcore()->boot_clock;
-	unsigned long ns = tod_to_ns(get_tod_clock() - boot_clock->tod);
+	unsigned long ns = tod_to_ns(__get_tod_clock_monotonic());
 	char ts[MAX_NUMLEN];
 
 	*buf++ = '[';

arch/s390/boot/startup.c

···
 #include <asm/extmem.h>
 #include <asm/sections.h>
 #include <asm/maccess.h>
+#include <asm/machine.h>
+#include <asm/sysinfo.h>
 #include <asm/cpu_mf.h>
 #include <asm/setup.h>
+#include <asm/timex.h>
 #include <asm/kasan.h>
 #include <asm/kexec.h>
 #include <asm/sclp.h>
···
 unsigned long __bootdata_preserved(page_noexec_mask);
 unsigned long __bootdata_preserved(segment_noexec_mask);
 unsigned long __bootdata_preserved(region_noexec_mask);
-int __bootdata_preserved(relocate_lowcore);
+union tod_clock __bootdata_preserved(tod_clock_base);
+u64 __bootdata_preserved(clock_comparator_max) = -1UL;
 
 u64 __bootdata_preserved(stfle_fac_list[16]);
 struct oldmem_data __bootdata_preserved(oldmem_data);
-
-struct machine_info machine;
 
 void error(char *x)
 {
···
 	disabled_wait();
 }
 
+static char sysinfo_page[PAGE_SIZE] __aligned(PAGE_SIZE);
+
+static void detect_machine_type(void)
+{
+	struct sysinfo_3_2_2 *vmms = (struct sysinfo_3_2_2 *)&sysinfo_page;
+
+	/* Check current-configuration-level */
+	if (stsi(NULL, 0, 0, 0) <= 2) {
+		set_machine_feature(MFEATURE_LPAR);
+		return;
+	}
+	/* Get virtual-machine cpu information. */
+	if (stsi(vmms, 3, 2, 2) || !vmms->count)
+		return;
+	/* Detect known hypervisors */
+	if (!memcmp(vmms->vm[0].cpi, "\xd2\xe5\xd4", 3))
+		set_machine_feature(MFEATURE_KVM);
+	else if (!memcmp(vmms->vm[0].cpi, "\xa9\x61\xe5\xd4", 4))
+		set_machine_feature(MFEATURE_VM);
+}
+
+static void detect_diag9c(void)
+{
+	unsigned int cpu;
+	int rc = 1;
+
+	cpu = stap();
+	asm_inline volatile(
+		"	diag	%[cpu],%%r0,0x9c\n"
+		"0:	lhi	%[rc],0\n"
+		"1:\n"
+		EX_TABLE(0b, 1b)
+		: [rc] "+d" (rc)
+		: [cpu] "d" (cpu)
+		: "cc", "memory");
+	if (!rc)
+		set_machine_feature(MFEATURE_DIAG9C);
+}
+
+static void reset_tod_clock(void)
+{
+	union tod_clock clk;
+
+	if (store_tod_clock_ext_cc(&clk) == 0)
+		return;
+	/* TOD clock not running. Set the clock to Unix Epoch. */
+	if (set_tod_clock(TOD_UNIX_EPOCH) || store_tod_clock_ext_cc(&clk))
+		disabled_wait();
+	memset(&tod_clock_base, 0, sizeof(tod_clock_base));
+	tod_clock_base.tod = TOD_UNIX_EPOCH;
+	get_lowcore()->last_update_clock = TOD_UNIX_EPOCH;
+}
+
 static void detect_facilities(void)
 {
-	if (test_facility(8)) {
-		machine.has_edat1 = 1;
+	if (cpu_has_edat1())
 		local_ctl_set_bit(0, CR0_EDAT_BIT);
-	}
-	if (test_facility(78))
-		machine.has_edat2 = 1;
 	page_noexec_mask = -1UL;
 	segment_noexec_mask = -1UL;
 	region_noexec_mask = -1UL;
-	if (!test_facility(130)) {
+	if (!cpu_has_nx()) {
 		page_noexec_mask &= ~_PAGE_NOEXEC;
 		segment_noexec_mask &= ~_SEGMENT_ENTRY_NOEXEC;
 		region_noexec_mask &= ~_REGION_ENTRY_NOEXEC;
 	}
+	if (IS_ENABLED(CONFIG_PCI) && test_facility(153))
+		set_machine_feature(MFEATURE_PCI_MIO);
+	reset_tod_clock();
+	if (test_facility(139) && (tod_clock_base.tod >> 63)) {
+		/* Enable signed clock comparator comparisons */
+		set_machine_feature(MFEATURE_SCC);
+		clock_comparator_max = -1UL >> 1;
+		local_ctl_set_bit(0, CR0_CLOCK_COMPARATOR_SIGN_BIT);
+	}
+	if (test_facility(50) && test_facility(73)) {
+		set_machine_feature(MFEATURE_TX);
+		local_ctl_set_bit(0, CR0_TRANSACTIONAL_EXECUTION_BIT);
+	}
+	if (cpu_has_vx())
+		local_ctl_set_bit(0, CR0_VECTOR_BIT);
 }
 
 static int cmma_test_essa(void)
 {
-	unsigned long reg1, reg2, tmp = 0;
+	unsigned long tmp = 0;
 	int rc = 1;
-	psw_t old;
 
 	/* Test ESSA_GET_STATE */
-	asm volatile(
-		"	mvc	0(16,%[psw_old]),0(%[psw_pgm])\n"
-		"	epsw	%[reg1],%[reg2]\n"
-		"	st	%[reg1],0(%[psw_pgm])\n"
-		"	st	%[reg2],4(%[psw_pgm])\n"
-		"	larl	%[reg1],1f\n"
-		"	stg	%[reg1],8(%[psw_pgm])\n"
+	asm_inline volatile(
 		"	.insn	rrf,0xb9ab0000,%[tmp],%[tmp],%[cmd],0\n"
-		"	la	%[rc],0\n"
-		"1:	mvc	0(16,%[psw_pgm]),0(%[psw_old])\n"
-		: [reg1] "=&d" (reg1),
-		  [reg2] "=&a" (reg2),
-		  [rc] "+&d" (rc),
-		  [tmp] "+&d" (tmp),
-		  "+Q" (get_lowcore()->program_new_psw),
-		  "=Q" (old)
-		: [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&get_lowcore()->program_new_psw),
-		  [cmd] "i" (ESSA_GET_STATE)
+		"0:	lhi	%[rc],0\n"
+		"1:\n"
+		EX_TABLE(0b, 1b)
+		: [rc] "+d" (rc), [tmp] "+d" (tmp)
+		: [cmd] "i" (ESSA_GET_STATE)
 		: "cc", "memory");
 	return rc;
 }
···
 
 	read_ipl_report();
 	sclp_early_read_info();
+	sclp_early_detect_machine_features();
 	detect_facilities();
+	detect_diag9c();
+	detect_machine_type();
 	cmma_init();
 	sanitize_prot_virt_host();
 	max_physmem_end = detect_max_physmem_end();

arch/s390/boot/vmem.c

···
 // SPDX-License-Identifier: GPL-2.0
 #define boot_fmt(fmt) "vmem: " fmt
+#include <linux/cpufeature.h>
 #include <linux/sched/task.h>
 #include <linux/pgtable.h>
 #include <linux/kasan.h>
···
 #include <asm/ctlreg.h>
 #include <asm/physmem_info.h>
 #include <asm/maccess.h>
+#include <asm/machine.h>
 #include <asm/abs_lowcore.h>
 #include "decompressor.h"
 #include "boot.h"
···
 {
 	unsigned long pa, size = end - addr;
 
-	if (!machine.has_edat2 || !large_page_mapping_allowed(mode) ||
+	if (!cpu_has_edat2() || !large_page_mapping_allowed(mode) ||
 	    !IS_ALIGNED(addr, PUD_SIZE) || (size < PUD_SIZE))
 		return INVALID_PHYS_ADDR;
 
···
 {
 	unsigned long pa, size = end - addr;
 
-	if (!machine.has_edat1 || !large_page_mapping_allowed(mode) ||
+	if (!cpu_has_edat1() || !large_page_mapping_allowed(mode) ||
 	    !IS_ALIGNED(addr, PMD_SIZE) || (size < PMD_SIZE))
 		return INVALID_PHYS_ADDR;
 
···
 	__arch_set_page_dat((void *)swapper_pg_dir, 1UL << CRST_ALLOC_ORDER);
 	__arch_set_page_dat((void *)invalid_pg_dir, 1UL << CRST_ALLOC_ORDER);
 
-	if (relocate_lowcore)
+	if (machine_has_relocated_lowcore())
 		lowcore_address = LOWCORE_ALT_ADDRESS;
 
 	/*

arch/s390/boot/vmlinux.lds.S

···
 		*(.rodata.*)
 		_erodata = . ;
 	}
+	EXCEPTION_TABLE(16)
 	.got : {
 		*(.got)
 	}
···
 	/DISCARD/ : {
 		COMMON_DISCARDS
 		*(.eh_frame)
-		*(__ex_table)
 		*(*__ksymtab*)
 		*(___kcrctab*)
 	}

arch/s390/configs/debug_defconfig

···
 CONFIG_HIST_TRIGGERS=y
 CONFIG_FTRACE_STARTUP_TEST=y
 # CONFIG_EVENT_TRACE_STARTUP_TEST is not set
+CONFIG_FTRACE_SORT_STARTUP_TEST=y
 CONFIG_SAMPLES=y
 CONFIG_SAMPLE_TRACE_PRINTK=m
 CONFIG_SAMPLE_FTRACE_DIRECT=m
 CONFIG_SAMPLE_FTRACE_DIRECT_MULTI=m
 CONFIG_SAMPLE_FTRACE_OPS=m
 CONFIG_DEBUG_ENTRY=y
+CONFIG_STRICT_MM_TYPECHECKS=y
 CONFIG_CIO_INJECT=y
 CONFIG_KUNIT=m
 CONFIG_KUNIT_DEBUGFS=y

arch/s390/configs/mmtypes.config

···
+# Help: Enable strict memory management typechecks
+CONFIG_STRICT_MM_TYPECHECKS=y

arch/s390/hypfs/hypfs_diag0c.c

···
 
 #include <linux/slab.h>
 #include <linux/cpu.h>
+#include <asm/machine.h>
 #include <asm/diag.h>
 #include <asm/hypfs.h>
 #include "hypfs.h"
···
  */
 int __init hypfs_diag0c_init(void)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return 0;
 	hypfs_dbfs_create_file(&dbfs_file_0c);
 	return 0;
···
  */
 void hypfs_diag0c_exit(void)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return;
 	hypfs_dbfs_remove_file(&dbfs_file_0c);
 }

arch/s390/hypfs/hypfs_diag_fs.c

···
 #include <linux/string.h>
 #include <linux/vmalloc.h>
 #include <linux/mm.h>
+#include <asm/machine.h>
 #include <asm/diag.h>
 #include <asm/ebcdic.h>
 #include "hypfs_diag.h"
···
 
 int __init __hypfs_diag_fs_init(void)
 {
-	if (MACHINE_IS_LPAR)
+	if (machine_is_lpar())
 		return diag224_get_name_table();
 	return 0;
 }

arch/s390/hypfs/hypfs_vm.c

···
 #include <linux/string.h>
 #include <linux/vmalloc.h>
 #include <asm/extable.h>
+#include <asm/machine.h>
 #include <asm/diag.h>
 #include <asm/ebcdic.h>
 #include <asm/timex.h>
···
 
 int hypfs_vm_init(void)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return 0;
 	if (diag2fc(0, all_guests, NULL) > 0)
 		diag2fc_guest_query = all_guests;
···
 
 void hypfs_vm_exit(void)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return;
 	hypfs_dbfs_remove_file(&dbfs_file_2fc);
 }

arch/s390/hypfs/inode.c

···
 #include <linux/kobject.h>
 #include <linux/seq_file.h>
 #include <linux/uio.h>
+#include <asm/machine.h>
 #include <asm/ebcdic.h>
 #include "hypfs.h"
 
···
 		goto out;
 	}
 	hypfs_delete_tree(sb->s_root);
-	if (MACHINE_IS_VM)
+	if (machine_is_vm())
 		rc = hypfs_vm_create_files(sb->s_root);
 	else
 		rc = hypfs_diag_create_files(sb->s_root);
···
 	sb->s_root = root_dentry = d_make_root(root_inode);
 	if (!root_dentry)
 		return -ENOMEM;
-	if (MACHINE_IS_VM)
+	if (machine_is_vm())
 		rc = hypfs_vm_create_files(root_dentry);
 	else
 		rc = hypfs_diag_create_files(root_dentry);

arch/s390/include/asm/abs_lowcore.h

···
 	put_cpu();
 }
 
-extern int relocate_lowcore;
-
-static inline int have_relocated_lowcore(void)
-{
-	return relocate_lowcore;
-}
-
 #endif /* _ASM_S390_ABS_LOWCORE_H */

arch/s390/include/asm/alternative.h

···
 #define ALT_CTX_ALL		(ALT_CTX_EARLY | ALT_CTX_LATE)
 
 #define ALT_TYPE_FACILITY	0
-#define ALT_TYPE_SPEC		1
-#define ALT_TYPE_LOWCORE	2
+#define ALT_TYPE_FEATURE	1
+#define ALT_TYPE_SPEC		2
 
 #define ALT_DATA_SHIFT		0
 #define ALT_TYPE_SHIFT		20
···
 					 ALT_TYPE_FACILITY << ALT_TYPE_SHIFT	| \
 					 (facility) << ALT_DATA_SHIFT)
 
+#define ALT_FEATURE(feature)		(ALT_CTX_EARLY << ALT_CTX_SHIFT		| \
+					 ALT_TYPE_FEATURE << ALT_TYPE_SHIFT	| \
+					 (feature) << ALT_DATA_SHIFT)
+
 #define ALT_SPEC(facility)		(ALT_CTX_LATE << ALT_CTX_SHIFT		| \
 					 ALT_TYPE_SPEC << ALT_TYPE_SHIFT	| \
 					 (facility) << ALT_DATA_SHIFT)
-
-#define ALT_LOWCORE			(ALT_CTX_EARLY << ALT_CTX_SHIFT		| \
-					 ALT_TYPE_LOWCORE << ALT_TYPE_SHIFT)
 
 #ifndef __ASSEMBLY__
 

arch/s390/include/asm/appldata.h

···
 #define _ASM_S390_APPLDATA_H
 
 #include <linux/io.h>
+#include <asm/machine.h>
 #include <asm/diag.h>
 
 #define APPLDATA_START_INTERVAL_REC	0x80
···
 {
 	int ry;
 
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return -EOPNOTSUPP;
 	parm_list->diag = 0xdc;
 	parm_list->function = fn;

arch/s390/include/asm/asm-extable.h

···
 #define EX_TYPE_UA_LOAD_REGPAIR	6
 #define EX_TYPE_ZEROPAD		7
 #define EX_TYPE_FPC		8
+#define EX_TYPE_UA_MVCOS_TO	9
+#define EX_TYPE_UA_MVCOS_FROM	10
 
 #define EX_DATA_REG_ERR_SHIFT	0
 #define EX_DATA_REG_ERR		GENMASK(3, 0)
···
 
 #define EX_TABLE_FPC(_fault, _target)					\
 	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FPC, __stringify(%%r0), __stringify(%%r0), 0)
+
+#define EX_TABLE_UA_MVCOS_TO(_fault, _target)				\
+	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_MVCOS_TO, __stringify(%%r0), __stringify(%%r0), 0)
+
+#define EX_TABLE_UA_MVCOS_FROM(_fault, _target)				\
+	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_UA_MVCOS_FROM, __stringify(%%r0), __stringify(%%r0), 0)
 
 #endif /* __ASM_EXTABLE_H */

arch/s390/include/asm/atomic_ops.h

···
 
 #undef __ATOMIC64_OPS
 
-#define __atomic_add_const(val, ptr)		__atomic_add(val, ptr)
-#define __atomic_add_const_barrier(val, ptr)	__atomic_add(val, ptr)
-#define __atomic64_add_const(val, ptr)		__atomic64_add(val, ptr)
-#define __atomic64_add_const_barrier(val, ptr)	__atomic64_add(val, ptr)
+#define __atomic_add_const(val, ptr)		((void)__atomic_add(val, ptr))
+#define __atomic_add_const_barrier(val, ptr)	((void)__atomic_add(val, ptr))
+#define __atomic64_add_const(val, ptr)		((void)__atomic64_add(val, ptr))
+#define __atomic64_add_const_barrier(val, ptr)	((void)__atomic64_add(val, ptr))
 
 #endif /* MARCH_HAS_Z196_FEATURES */
 

arch/s390/include/asm/cpu_mf.h

···
 {
 	int rc = -EINVAL;
 
-	asm volatile (
+	asm_inline volatile (
 		"0:	qctri	%1\n"
 		"1:	lhi	%0,0\n"
 		"2:\n"
···
 {
 	int cc;
 
-	asm volatile (
+	asm_inline volatile (
 		"	lcctl	%[ctl]\n"
 		CC_IPM(cc)
 		: CC_OUT(cc, cc)
···
 	u64 _content;
 	int cc;
 
-	asm volatile (
+	asm_inline volatile (
 		"	ecctr	%[_content],%[ctr]\n"
 		CC_IPM(cc)
 		: CC_OUT(cc, cc), [_content] "=d" (_content)

arch/s390/include/asm/cpufeature.h

···
 #ifndef __ASM_S390_CPUFEATURE_H
 #define __ASM_S390_CPUFEATURE_H
 
+#include <asm/facility.h>
+
 enum {
 	S390_CPU_FEATURE_MSA,
 	S390_CPU_FEATURE_VXRS,
···
 #define cpu_feature(feature)	(feature)
 
 int cpu_have_feature(unsigned int nr);
+
+#define cpu_has_bear()		test_facility(193)
+#define cpu_has_edat1()		test_facility(8)
+#define cpu_has_edat2()		test_facility(78)
+#define cpu_has_gs()		test_facility(133)
+#define cpu_has_idte()		test_facility(3)
+#define cpu_has_nx()		test_facility(130)
+#define cpu_has_rdp()		test_facility(194)
+#define cpu_has_seq_insn()	test_facility(85)
+#define cpu_has_tlb_lc()	test_facility(51)
+#define cpu_has_topology()	test_facility(11)
+#define cpu_has_vx()		test_facility(129)
 
 #endif /* __ASM_S390_CPUFEATURE_H */

arch/s390/include/asm/current.h

···
 #define _S390_CURRENT_H
 
 #include <asm/lowcore.h>
+#include <asm/machine.h>
 
 struct task_struct;
 
-#define current ((struct task_struct *const)get_lowcore()->current_task)
+static __always_inline struct task_struct *get_current(void)
+{
+	unsigned long ptr, lc_current;
+
+	lc_current = offsetof(struct lowcore, current_task);
+	asm_inline(
+		ALTERNATIVE("	lg	%[ptr],%[offzero](%%r0)\n",
+			    "	lg	%[ptr],%[offalt](%%r0)\n",
+			    ALT_FEATURE(MFEATURE_LOWCORE))
+		: [ptr] "=d" (ptr)
+		: [offzero] "i" (lc_current),
+		  [offalt] "i" (lc_current + LOWCORE_ALT_ADDRESS));
+	return (struct task_struct *)ptr;
+}
+
+#define current get_current()
 
 #endif /* !(_S390_CURRENT_H) */

arch/s390/include/asm/diag.h

···
 	end_addr = pfn_to_phys(start_pfn + num_pfn - 1);
 
 	diag_stat_inc(DIAG_STAT_X010);
-	asm volatile(
+	asm_inline volatile(
 		"0:	diag	%0,%1,0x10\n"
 		"1:	nopr	%%r7\n"
 		EX_TABLE(0b, 1b)

arch/s390/include/asm/elf.h

···
 #define ELF_DATA	ELFDATA2MSB
 #define ELF_ARCH	EM_S390
 
-/* s390 specific phdr types */
-#define PT_S390_PGSTE	0x70000000
-
 /*
  * ELF register definitions..
  */
···
 	(((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
 	 && (x)->e_ident[EI_CLASS] == ELF_CLASS)
 #define compat_start_thread	start_thread31
-
-struct arch_elf_state {
-	int rc;
-};
-
-#define INIT_ARCH_ELF_STATE { .rc = 0 }
-
-#define arch_check_elf(ehdr, interp, interp_ehdr, state) (0)
-#ifdef CONFIG_PGSTE
-#define arch_elf_pt_proc(ehdr, phdr, elf, interp, state)	\
-({								\
-	struct arch_elf_state *_state = state;			\
-	if ((phdr)->p_type == PT_S390_PGSTE &&			\
-	    !page_table_allocate_pgste &&			\
-	    !test_thread_flag(TIF_PGSTE) &&			\
-	    !current->mm->context.alloc_pgste) {		\
-		set_thread_flag(TIF_PGSTE);			\
-		set_pt_regs_flag(task_pt_regs(current),		\
-				 PIF_EXECVE_PGSTE_RESTART);	\
-		_state->rc = -EAGAIN;				\
-	}							\
-	_state->rc;						\
-})
-#else
-#define arch_elf_pt_proc(ehdr, phdr, elf, interp, state)	\
-({								\
-	(state)->rc;						\
-})
-#endif
 
 /* For SVR4/S390 the function pointer to be registered with `atexit` is
    passed in R14. */

arch/s390/include/asm/fpu.h

···
 #ifndef _ASM_S390_FPU_H
 #define _ASM_S390_FPU_H
 
+#include <linux/cpufeature.h>
 #include <linux/processor.h>
 #include <linux/preempt.h>
 #include <linux/string.h>
···
 #include <asm/sigcontext.h>
 #include <asm/fpu-types.h>
 #include <asm/fpu-insn.h>
-#include <asm/facility.h>
-
-static inline bool cpu_has_vx(void)
-{
-	return likely(test_facility(129));
-}
 
 enum {
 	KERNEL_FPC_BIT = 0,

arch/s390/include/asm/hugetlb.h

···
 #ifndef _ASM_S390_HUGETLB_H
 #define _ASM_S390_HUGETLB_H
 
+#include <linux/cpufeature.h>
 #include <linux/pgtable.h>
 #include <linux/swap.h>
 #include <linux/swapops.h>
 #include <asm/page.h>
 
-#define hugepages_supported()			(MACHINE_HAS_EDAT1)
+#define hugepages_supported()	cpu_has_edat1()
 
 #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,

arch/s390/include/asm/io.h

···
 
 #define ioremap_wc(addr, size)  \
 	ioremap_prot((addr), (size), pgprot_val(pgprot_writecombine(PAGE_KERNEL)))
-#define ioremap_wt(addr, size)  \
-	ioremap_prot((addr), (size), pgprot_val(pgprot_writethrough(PAGE_KERNEL)))
 
 static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
 {

arch/s390/include/asm/kfence.h

···
 
 static __always_inline bool arch_kfence_init_pool(void)
 {
-	return true;
-}
-
-#define arch_kfence_test_address(addr) ((addr) & PAGE_MASK)
-
-/*
- * Do not split kfence pool to 4k mapping with arch_kfence_init_pool(),
- * but earlier where page table allocations still happen with memblock.
- * Reason is that arch_kfence_init_pool() gets called when the system
- * is still in a limbo state - disabling and enabling bottom halves is
- * not yet allowed, but that is what our page_table_alloc() would do.
- */
-static __always_inline void kfence_split_mapping(void)
-{
 #ifdef CONFIG_KFENCE
 	unsigned long pool_pages = KFENCE_POOL_SIZE >> PAGE_SHIFT;
 
 	set_memory_4k((unsigned long)__kfence_pool, pool_pages);
 #endif
+	return true;
 }
+
+#define arch_kfence_test_address(addr) ((addr) & PAGE_MASK)
 
 static inline bool kfence_protect_page(unsigned long addr, bool protect)
 {

arch/s390/include/asm/lowcore.h

···
 #define _ASM_S390_LOWCORE_H
 
 #include <linux/types.h>
+#include <asm/machine.h>
 #include <asm/ptrace.h>
 #include <asm/ctlreg.h>
 #include <asm/cpu.h>
···
 	__u64	int_clock;			/* 0x0318 */
 	__u8	pad_0x0320[0x0328-0x0320];	/* 0x0320 */
 	__u64	clock_comparator;		/* 0x0328 */
-	__u64	boot_clock[2];			/* 0x0330 */
+	__u8	pad_0x0330[0x0340-0x0330];	/* 0x0330 */
 
 	/* Current process. */
 	__u64	current_task;			/* 0x0340 */
···
 
 	if (__is_defined(__DECOMPRESSOR))
 		return NULL;
-	asm(ALTERNATIVE("llilh %[lc],0", "llilh %[lc],%[alt]", ALT_LOWCORE)
-	    : [lc] "=d" (lc)
-	    : [alt] "i" (LOWCORE_ALT_ADDRESS >> 16));
+	asm_inline(
+		ALTERNATIVE("	lghi	%[lc],0",
+			    "	llilh	%[lc],%[alt]",
+			    ALT_FEATURE(MFEATURE_LOWCORE))
+		: [lc] "=d" (lc)
+		: [alt] "i" (LOWCORE_ALT_ADDRESS >> 16));
 	return lc;
 }
 
···
 #else /* __ASSEMBLY__ */
 
 .macro GET_LC reg
-	ALTERNATIVE "llilh	\reg,0",					\
+	ALTERNATIVE "lghi	\reg,0",					\
 		__stringify(llilh	\reg, LOWCORE_ALT_ADDRESS >> 16),	\
-		ALT_LOWCORE
+		ALT_FEATURE(MFEATURE_LOWCORE)
 .endm
 
 .macro STMG_LC start, end, savearea
 	ALTERNATIVE "stmg	\start, \end, \savearea",				\
 		__stringify(stmg	\start, \end, LOWCORE_ALT_ADDRESS + \savearea),	\
-		ALT_LOWCORE
+		ALT_FEATURE(MFEATURE_LOWCORE)
 .endm
 
 #endif /* __ASSEMBLY__ */

arch/s390/include/asm/machine.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 2024
+ */
+
+#ifndef __ASM_S390_MACHINE_H
+#define __ASM_S390_MACHINE_H
+
+#include <linux/const.h>
+
+#define MFEATURE_LOWCORE	0
+#define MFEATURE_PCI_MIO	1
+#define MFEATURE_SCC		2
+#define MFEATURE_TLB_GUEST	3
+#define MFEATURE_TX		4
+#define MFEATURE_ESOP		5
+#define MFEATURE_DIAG9C		6
+#define MFEATURE_VM		7
+#define MFEATURE_KVM		8
+#define MFEATURE_LPAR		9
+
+#ifndef __ASSEMBLY__
+
+#include <linux/bitops.h>
+#include <asm/alternative.h>
+
+extern unsigned long machine_features[1];
+
+#define MAX_MFEATURE_BIT (sizeof(machine_features) * BITS_PER_BYTE)
+
+static inline void __set_machine_feature(unsigned int nr, unsigned long *mfeatures)
+{
+	if (nr >= MAX_MFEATURE_BIT)
+		return;
+	__set_bit(nr, mfeatures);
+}
+
+static inline void set_machine_feature(unsigned int nr)
+{
+	__set_machine_feature(nr, machine_features);
+}
+
+static inline void __clear_machine_feature(unsigned int nr, unsigned long *mfeatures)
+{
+	if (nr >= MAX_MFEATURE_BIT)
+		return;
+	__clear_bit(nr, mfeatures);
+}
+
+static inline void clear_machine_feature(unsigned int nr)
+{
+	__clear_machine_feature(nr, machine_features);
+}
+
+static bool __test_machine_feature(unsigned int nr, unsigned long *mfeatures)
+{
+	if (nr >= MAX_MFEATURE_BIT)
+		return false;
+	return test_bit(nr, mfeatures);
+}
+
+static bool test_machine_feature(unsigned int nr)
+{
+	return __test_machine_feature(nr, machine_features);
+}
+
+static __always_inline bool __test_machine_feature_constant(unsigned int nr)
+{
+	asm goto(
+		ALTERNATIVE("brcl 15,%l[l_no]", "brcl 0,0", ALT_FEATURE(%[nr]))
+		:
+		: [nr] "i" (nr)
+		:
+		: l_no);
+	return true;
+l_no:
+	return false;
+}
+
+#define DEFINE_MACHINE_HAS_FEATURE(name, feature)				\
+static __always_inline bool machine_has_##name(void)				\
+{										\
+	if (!__is_defined(__DECOMPRESSOR) && __builtin_constant_p(feature))	\
+		return __test_machine_feature_constant(feature);		\
+	return test_machine_feature(feature);					\
+}
+
+DEFINE_MACHINE_HAS_FEATURE(relocated_lowcore, MFEATURE_LOWCORE)
+DEFINE_MACHINE_HAS_FEATURE(scc, MFEATURE_SCC)
+DEFINE_MACHINE_HAS_FEATURE(tlb_guest, MFEATURE_TLB_GUEST)
+DEFINE_MACHINE_HAS_FEATURE(tx, MFEATURE_TX)
+DEFINE_MACHINE_HAS_FEATURE(esop, MFEATURE_ESOP)
+DEFINE_MACHINE_HAS_FEATURE(diag9c, MFEATURE_DIAG9C)
+DEFINE_MACHINE_HAS_FEATURE(vm, MFEATURE_VM)
+DEFINE_MACHINE_HAS_FEATURE(kvm, MFEATURE_KVM)
+DEFINE_MACHINE_HAS_FEATURE(lpar, MFEATURE_LPAR)
+
+#define machine_is_vm	machine_has_vm
+#define machine_is_kvm	machine_has_kvm
+#define machine_is_lpar	machine_has_lpar
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ASM_S390_MACHINE_H */

arch/s390/include/asm/mmu.h

···
 	 * The following bitfields need a down_write on the mm
 	 * semaphore when they are written to. As they are only
 	 * written once, they can be read without a lock.
-	 *
-	 * The mmu context allocates 4K page tables.
 	 */
-	unsigned int alloc_pgste:1;
 	/* The mmu context uses extended page tables. */
 	unsigned int has_pgste:1;
 	/* The mmu context uses storage keys. */

arch/s390/include/asm/mmu_context.h

···
 	mm->context.gmap_asce = 0;
 	mm->context.flush_mm = 0;
 #ifdef CONFIG_PGSTE
-	mm->context.alloc_pgste = page_table_allocate_pgste ||
-		test_thread_flag(TIF_PGSTE) ||
-		(current->mm && current->mm->context.alloc_pgste);
 	mm->context.has_pgste = 0;
 	mm->context.uses_skeys = 0;
 	mm->context.uses_cmm = 0;

arch/s390/include/asm/page.h

···
 #define vma_alloc_zeroed_movable_folio(vma, vaddr) \
 	vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr)
 
-/*
- * These are used to make use of C type-checking..
- */
+#ifdef CONFIG_STRICT_MM_TYPECHECKS
+#define STRICT_MM_TYPECHECKS
+#endif
+
+#ifdef STRICT_MM_TYPECHECKS
 
 typedef struct { unsigned long pgprot; } pgprot_t;
 typedef struct { unsigned long pgste; } pgste_t;
···
 typedef struct { unsigned long pud; } pud_t;
 typedef struct { unsigned long p4d; } p4d_t;
 typedef struct { unsigned long pgd; } pgd_t;
+
+#define DEFINE_PGVAL_FUNC(name)						\
+static __always_inline unsigned long name ## _val(name ## _t name)	\
+{									\
+	return name.name;						\
+}
+
+#else /* STRICT_MM_TYPECHECKS */
+
+typedef unsigned long pgprot_t;
+typedef unsigned long pgste_t;
+typedef unsigned long pte_t;
+typedef unsigned long pmd_t;
+typedef unsigned long pud_t;
+typedef unsigned long p4d_t;
+typedef unsigned long pgd_t;
+
+#define DEFINE_PGVAL_FUNC(name)						\
+static __always_inline unsigned long name ## _val(name ## _t name)	\
+{									\
+	return name;							\
+}
+
+#endif /* STRICT_MM_TYPECHECKS */
+
+DEFINE_PGVAL_FUNC(pgprot)
+DEFINE_PGVAL_FUNC(pgste)
+DEFINE_PGVAL_FUNC(pte)
+DEFINE_PGVAL_FUNC(pmd)
+DEFINE_PGVAL_FUNC(pud)
+DEFINE_PGVAL_FUNC(p4d)
+DEFINE_PGVAL_FUNC(pgd)
+
 typedef pte_t *pgtable_t;
 
-#define pgprot_val(x)	((x).pgprot)
-#define pgste_val(x)	((x).pgste)
-
-static inline unsigned long pte_val(pte_t pte)
-{
-	return pte.pte;
-}
-
-static inline unsigned long pmd_val(pmd_t pmd)
-{
-	return pmd.pmd;
-}
-
-static inline unsigned long pud_val(pud_t pud)
-{
-	return pud.pud;
-}
-
-static inline unsigned long p4d_val(p4d_t p4d)
-{
-	return p4d.p4d;
-}
-
-static inline unsigned long pgd_val(pgd_t pgd)
-{
-	return pgd.pgd;
-}
-
+#define __pgprot(x)	((pgprot_t) { (x) } )
 #define __pgste(x)	((pgste_t) { (x) } )
 #define __pte(x)        ((pte_t) { (x) } )
 #define __pmd(x)        ((pmd_t) { (x) } )
 #define __pud(x)	((pud_t) { (x) } )
 #define __p4d(x)	((p4d_t) { (x) } )
 #define __pgd(x)        ((pgd_t) { (x) } )
-#define __pgprot(x)     ((pgprot_t) { (x) } )
 
 static inline void page_set_storage_key(unsigned long addr,
 					unsigned char skey, int mapped)

arch/s390/include/asm/pgalloc.h

···
 struct ptdesc *page_table_alloc_pgste(struct mm_struct *mm);
 void page_table_free(struct mm_struct *, unsigned long *);
 void page_table_free_pgste(struct ptdesc *ptdesc);
-extern int page_table_allocate_pgste;
 
 static inline void crst_table_init(unsigned long *crst, unsigned long entry)
 {

arch/s390/include/asm/pgtable.h

···
 
 #include <linux/sched.h>
 #include <linux/mm_types.h>
+#include <linux/cpufeature.h>
 #include <linux/page-flags.h>
 #include <linux/radix-tree.h>
 #include <linux/atomic.h>
···
 	return 0;
 }
 
-static inline int mm_alloc_pgste(struct mm_struct *mm)
+static inline pgste_t clear_pgste_bit(pgste_t pgste, unsigned long mask)
 {
-#ifdef CONFIG_PGSTE
-	if (unlikely(mm->context.alloc_pgste))
-		return 1;
-#endif
-	return 0;
+	return __pgste(pgste_val(pgste) & ~mask);
+}
+
+static inline pgste_t set_pgste_bit(pgste_t pgste, unsigned long mask)
+{
+	return __pgste(pgste_val(pgste) | mask);
 }
 
 static inline pte_t clear_pte_bit(pte_t pte, pgprot_t prot)
···
 	 * PTE does not have _PAGE_PROTECT set, to avoid unnecessary overhead.
 	 * A local RDP can be used to do the flush.
 	 */
-	if (MACHINE_HAS_RDP && !(pte_val(*ptep) & _PAGE_PROTECT))
+	if (cpu_has_rdp() && !(pte_val(*ptep) & _PAGE_PROTECT))
 		__ptep_rdp(address, ptep, 0, 0, 1);
 }
 #define flush_tlb_fix_spurious_fault flush_tlb_fix_spurious_fault
···
 {
 	if (pte_same(*ptep, entry))
 		return 0;
-	if (MACHINE_HAS_RDP && !mm_has_pgste(vma->vm_mm) && pte_allow_rdp(*ptep, entry))
+	if (cpu_has_rdp() && !mm_has_pgste(vma->vm_mm) && pte_allow_rdp(*ptep, entry))
 		ptep_reset_dat_prot(vma->vm_mm, addr, ptep, entry);
 	else
 		ptep_xchg_direct(vma->vm_mm, addr, ptep, entry);
···
 
 #define pgprot_writecombine	pgprot_writecombine
 pgprot_t pgprot_writecombine(pgprot_t prot);
-
-#define pgprot_writethrough	pgprot_writethrough
-pgprot_t pgprot_writethrough(pgprot_t prot);
 
 #define PFN_PTE_SHIFT		PAGE_SHIFT
 
···
 #define has_transparent_hugepage has_transparent_hugepage
 static inline int has_transparent_hugepage(void)
 {
-	return MACHINE_HAS_EDAT1 ? 1 : 0;
+	return cpu_has_edat1() ? 1 : 0;
 }
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 

arch/s390/include/asm/processor.h

···
 
 static __always_inline void bpon(void)
 {
-	asm volatile(ALTERNATIVE("nop", ".insn	rrf,0xb2e80000,0,0,13,0", ALT_SPEC(82)));
+	asm_inline volatile(
+		ALTERNATIVE("	nop\n",
+			    "	.insn	rrf,0xb2e80000,0,0,13,0\n",
+			    ALT_SPEC(82))
+		);
 }
 
 #endif /* __ASSEMBLY__ */

arch/s390/include/asm/ptrace.h

···
 #include <asm/tpi.h>
 
 #define PIF_SYSCALL			0	/* inside a system call */
-#define PIF_EXECVE_PGSTE_RESTART	1	/* restart execve for PGSTE binaries */
 #define PIF_SYSCALL_RET_SET		2	/* return value was set via ptrace */
 #define PIF_GUEST_FAULT			3	/* indicates program check in sie64a */
 #define PIF_FTRACE_FULL_REGS		4	/* all register contents valid (ftrace) */
 
 #define _PIF_SYSCALL			BIT(PIF_SYSCALL)
-#define _PIF_EXECVE_PGSTE_RESTART	BIT(PIF_EXECVE_PGSTE_RESTART)
 #define _PIF_SYSCALL_RET_SET		BIT(PIF_SYSCALL_RET_SET)
 #define _PIF_GUEST_FAULT		BIT(PIF_GUEST_FAULT)
 #define _PIF_FTRACE_FULL_REGS		BIT(PIF_FTRACE_FULL_REGS)

arch/s390/include/asm/sclp.h

···
 int sclp_early_get_core_info(struct sclp_core_info *info);
 void sclp_early_get_ipl_info(struct sclp_ipl_info *info);
 void sclp_early_detect(void);
+void sclp_early_detect_machine_features(void);
 void sclp_early_printk(const char *s);
 void __sclp_early_printk(const char *s, unsigned int len);
 void sclp_emergency_printk(const char *s);

arch/s390/include/asm/setup.h

···
 #define PARMAREA		0x10400
 
 #define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
-/*
- * Machine features detected in early.c
- */
-
-#define MACHINE_FLAG_VM		BIT(0)
-#define MACHINE_FLAG_KVM	BIT(1)
-#define MACHINE_FLAG_LPAR	BIT(2)
-#define MACHINE_FLAG_DIAG9C	BIT(3)
-#define MACHINE_FLAG_ESOP	BIT(4)
-#define MACHINE_FLAG_IDTE	BIT(5)
-#define MACHINE_FLAG_EDAT1	BIT(7)
-#define MACHINE_FLAG_EDAT2	BIT(8)
-#define MACHINE_FLAG_TOPOLOGY	BIT(10)
-#define MACHINE_FLAG_TE		BIT(11)
-#define MACHINE_FLAG_TLB_LC	BIT(12)
-#define MACHINE_FLAG_TLB_GUEST	BIT(14)
-#define MACHINE_FLAG_NX		BIT(15)
-#define MACHINE_FLAG_GS		BIT(16)
-#define MACHINE_FLAG_SCC	BIT(17)
-#define MACHINE_FLAG_PCI_MIO	BIT(18)
-#define MACHINE_FLAG_RDP	BIT(19)
-#define MACHINE_FLAG_SEQ_INSN	BIT(20)
 
 #define LPP_MAGIC		BIT(31)
 #define LPP_PID_MASK		_AC(0xffffffff, UL)
···
 
 /* The Write Back bit position in the physaddr is given by the SLPC PCI */
 extern unsigned long mio_wb_bit_mask;
-
-#define MACHINE_IS_VM		(get_lowcore()->machine_flags & MACHINE_FLAG_VM)
-#define MACHINE_IS_KVM		(get_lowcore()->machine_flags & MACHINE_FLAG_KVM)
-#define MACHINE_IS_LPAR		(get_lowcore()->machine_flags & MACHINE_FLAG_LPAR)
-
-#define MACHINE_HAS_DIAG9C	(get_lowcore()->machine_flags & MACHINE_FLAG_DIAG9C)
-#define MACHINE_HAS_ESOP	(get_lowcore()->machine_flags & MACHINE_FLAG_ESOP)
-#define MACHINE_HAS_IDTE	(get_lowcore()->machine_flags & MACHINE_FLAG_IDTE)
-#define MACHINE_HAS_EDAT1	(get_lowcore()->machine_flags & MACHINE_FLAG_EDAT1)
-#define MACHINE_HAS_EDAT2	(get_lowcore()->machine_flags & MACHINE_FLAG_EDAT2)
-#define MACHINE_HAS_TOPOLOGY	(get_lowcore()->machine_flags & MACHINE_FLAG_TOPOLOGY)
-#define MACHINE_HAS_TE		(get_lowcore()->machine_flags & MACHINE_FLAG_TE)
-#define MACHINE_HAS_TLB_LC	(get_lowcore()->machine_flags & MACHINE_FLAG_TLB_LC)
-#define MACHINE_HAS_TLB_GUEST	(get_lowcore()->machine_flags & MACHINE_FLAG_TLB_GUEST)
-#define MACHINE_HAS_NX		(get_lowcore()->machine_flags & MACHINE_FLAG_NX)
-#define MACHINE_HAS_GS		(get_lowcore()->machine_flags & MACHINE_FLAG_GS)
-#define MACHINE_HAS_SCC		(get_lowcore()->machine_flags & MACHINE_FLAG_SCC)
-#define MACHINE_HAS_PCI_MIO	(get_lowcore()->machine_flags & MACHINE_FLAG_PCI_MIO)
-#define MACHINE_HAS_RDP		(get_lowcore()->machine_flags & MACHINE_FLAG_RDP)
-#define MACHINE_HAS_SEQ_INSN	(get_lowcore()->machine_flags & MACHINE_FLAG_SEQ_INSN)
 
 /*
  * Console mode. Override with conmode=

arch/s390/include/asm/smp.h

···
 #ifndef __ASM_SMP_H
 #define __ASM_SMP_H
 
-#include <asm/sigp.h>
-#include <asm/lowcore.h>
 #include <asm/processor.h>
+#include <asm/lowcore.h>
+#include <asm/machine.h>
+#include <asm/sigp.h>
 
-#define raw_smp_processor_id()	(get_lowcore()->cpu_nr)
+static __always_inline unsigned int raw_smp_processor_id(void)
+{
+	unsigned long lc_cpu_nr;
+	unsigned int cpu;
+
+	BUILD_BUG_ON(sizeof_field(struct lowcore, cpu_nr) != sizeof(cpu));
+	lc_cpu_nr = offsetof(struct lowcore, cpu_nr);
+	asm_inline(
+		ALTERNATIVE("   ly      %[cpu],%[offzero](%%r0)\n",
+			    "   ly      %[cpu],%[offalt](%%r0)\n",
+			    ALT_FEATURE(MFEATURE_LOWCORE))
+		: [cpu] "=d" (cpu)
+		: [offzero] "i" (lc_cpu_nr),
+		  [offalt] "i" (lc_cpu_nr + LOWCORE_ALT_ADDRESS),
+		  "m" (((struct lowcore *)0)->cpu_nr));
+	return cpu;
+}
+
 #define arch_scale_cpu_capacity smp_cpu_get_capacity
 
 extern struct mutex smp_cpu_state_mutex;

arch/s390/include/asm/spinlock.h

···
 #include <asm/processor.h>
 #include <asm/alternative.h>
 
-#define SPINLOCK_LOCKVAL (get_lowcore()->spinlock_lockval)
+static __always_inline unsigned int spinlock_lockval(void)
+{
+	unsigned long lc_lockval;
+	unsigned int lockval;
+
+	BUILD_BUG_ON(sizeof_field(struct lowcore, spinlock_lockval) != sizeof(lockval));
+	lc_lockval = offsetof(struct lowcore, spinlock_lockval);
+	asm_inline(
+		ALTERNATIVE("   ly      %[lockval],%[offzero](%%r0)\n",
+			    "   ly      %[lockval],%[offalt](%%r0)\n",
+			    ALT_FEATURE(MFEATURE_LOWCORE))
+		: [lockval] "=d" (lockval)
+		: [offzero] "i" (lc_lockval),
+		  [offalt] "i" (lc_lockval + LOWCORE_ALT_ADDRESS),
+		  "m" (((struct lowcore *)0)->spinlock_lockval));
+	return lockval;
+}
 
 extern int spin_retry;
 
···
 	int old = 0;
 
 	barrier();
-	return likely(arch_try_cmpxchg(&lp->lock, &old, SPINLOCK_LOCKVAL));
+	return likely(arch_try_cmpxchg(&lp->lock, &old, spinlock_lockval()));
 }
 
 static inline void arch_spin_lock(arch_spinlock_t *lp)

arch/s390/include/asm/syscall.h

···
 					 unsigned long *args)
 {
 	unsigned long mask = -1UL;
-	unsigned int n = 6;
 
 #ifdef CONFIG_COMPAT
 	if (test_tsk_thread_flag(task, TIF_31BIT))
 		mask = 0xffffffff;
 #endif
-	while (n-- > 0)
-		if (n > 0)
-			args[n] = regs->gprs[2 + n] & mask;
+	for (int i = 1; i < 6; i++)
+		args[i] = regs->gprs[2 + i] & mask;
 
 	args[0] = regs->orig_gpr2 & mask;
 }

arch/s390/include/asm/sysinfo.h

···
 #ifndef __ASM_S390_SYSINFO_H
 #define __ASM_S390_SYSINFO_H
 
-#include <asm/bitsperlong.h>
 #include <linux/uuid.h>
+#include <asm/bitsperlong.h>
+#include <asm/asm.h>
+
+/*
+ * stsi - store system information
+ *
+ * Returns the current configuration level if function code 0 was specified.
+ * Otherwise returns 0 on success or a negative value on error.
+ */
+static inline int stsi(void *sysinfo, int fc, int sel1, int sel2)
+{
+	int r0 = (fc << 28) | sel1;
+	int cc;
+
+	asm volatile(
+		"	lr	%%r0,%[r0]\n"
+		"	lr	%%r1,%[r1]\n"
+		"	stsi	%[sysinfo]\n"
+		"	lr	%[r0],%%r0\n"
+		CC_IPM(cc)
+		: CC_OUT(cc, cc), [r0] "+d" (r0), [sysinfo] "=Q" (*(char *)sysinfo)
+		: [r1] "d" (sel2)
+		: CC_CLOBBER_LIST("0", "1", "memory"));
+	if (cc == 3)
+		return -EOPNOTSUPP;
+	return fc ? 0 : (unsigned int)r0 >> 28;
+}
 
 struct sysinfo_1_1_1 {
 	unsigned char p:1;

arch/s390/include/asm/thread_info.h

···
 #define TIF_NEED_RESCHED_LAZY	3	/* lazy rescheduling needed */
 #define TIF_UPROBE		4	/* breakpointed or single-stepping */
 #define TIF_PATCH_PENDING	5	/* pending live patching update */
-#define TIF_PGSTE		6	/* New mm's will use 4K page tables */
 #define TIF_NOTIFY_SIGNAL	7	/* signal notifications exist */
 #define TIF_GUARDED_STORAGE	8	/* load guarded storage control block */
 #define TIF_ISOLATE_BP_GUEST	9	/* Run KVM guests with isolated BP */
···
 #define _TIF_NEED_RESCHED_LAZY	BIT(TIF_NEED_RESCHED_LAZY)
 #define _TIF_UPROBE		BIT(TIF_UPROBE)
 #define _TIF_PATCH_PENDING	BIT(TIF_PATCH_PENDING)
-#define _TIF_PGSTE		BIT(TIF_PGSTE)
 #define _TIF_NOTIFY_SIGNAL	BIT(TIF_NOTIFY_SIGNAL)
 #define _TIF_GUARDED_STORAGE	BIT(TIF_GUARDED_STORAGE)
 #define _TIF_ISOLATE_BP_GUEST	BIT(TIF_ISOLATE_BP_GUEST)

arch/s390/include/asm/timex.h

···
 #include <linux/preempt.h>
 #include <linux/time64.h>
 #include <asm/lowcore.h>
+#include <asm/machine.h>
 #include <asm/asm.h>
 
 /* The value of the TOD clock for 1.1.1970. */
···
  */
 static inline int tod_after(unsigned long a, unsigned long b)
 {
-	if (MACHINE_HAS_SCC)
+	if (machine_has_scc())
 		return (long) a > (long) b;
 	return a > b;
 }
···
  */
 static inline int tod_after_eq(unsigned long a, unsigned long b)
 {
-	if (MACHINE_HAS_SCC)
+	if (machine_has_scc())
 		return (long) a >= (long) b;
 	return a >= b;
 }

arch/s390/include/asm/tlb.h

···
 	tlb->mm->context.flush_mm = 1;
 	tlb->freed_tables = 1;
 	tlb->cleared_pmds = 1;
-	if (mm_alloc_pgste(tlb->mm))
+	if (mm_has_pgste(tlb->mm))
 		gmap_unlink(tlb->mm, (unsigned long *)pte, address);
 	tlb_remove_ptdesc(tlb, virt_to_ptdesc(pte));
 }

arch/s390/include/asm/tlbflush.h

···
 #ifndef _S390_TLBFLUSH_H
 #define _S390_TLBFLUSH_H
 
+#include <linux/cpufeature.h>
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <asm/processor.h>
+#include <asm/machine.h>
 
 /*
  * Flush all TLB entries on the local CPU.
···
 	unsigned long opt;
 
 	opt = IDTE_PTOA;
-	if (MACHINE_HAS_TLB_GUEST)
+	if (machine_has_tlb_guest())
 		opt |= IDTE_GUEST_ASCE;
 	/* Global TLB flush for the mm */
 	asm volatile("idte 0,%1,%0" : : "a" (opt), "a" (asce) : "cc");
···
 	cpumask_copy(mm_cpumask(mm), &mm->context.cpu_attach_mask);
 	barrier();
 	gmap_asce = READ_ONCE(mm->context.gmap_asce);
-	if (MACHINE_HAS_IDTE && gmap_asce != -1UL) {
+	if (cpu_has_idte() && gmap_asce != -1UL) {
 		if (gmap_asce)
 			__tlb_flush_idte(gmap_asce);
 		__tlb_flush_idte(mm->context.asce);
···
 
 static inline void __tlb_flush_kernel(void)
 {
-	if (MACHINE_HAS_IDTE)
+	if (cpu_has_idte())
 		__tlb_flush_idte(init_mm.context.asce);
 	else
 		__tlb_flush_global();

arch/s390/include/asm/uaccess.h

···
 /*
  * User space memory access functions
  */
+#include <linux/pgtable.h>
 #include <asm/asm-extable.h>
 #include <asm/processor.h>
 #include <asm/extable.h>
···
 
 void debug_user_asce(int exit);
 
-union oac {
-	unsigned int val;
-	struct {
-		struct {
-			unsigned short key : 4;
-			unsigned short	   : 4;
-			unsigned short as  : 2;
-			unsigned short	   : 4;
-			unsigned short k   : 1;
-			unsigned short a   : 1;
-		} oac1;
-		struct {
-			unsigned short key : 4;
-			unsigned short	   : 4;
-			unsigned short as  : 2;
-			unsigned short	   : 4;
-			unsigned short k   : 1;
-			unsigned short a   : 1;
-		} oac2;
-	};
-};
+#ifdef CONFIG_KMSAN
+#define uaccess_kmsan_or_inline noinline __maybe_unused __no_sanitize_memory
+#else
+#define uaccess_kmsan_or_inline __always_inline
+#endif
 
-static __always_inline __must_check unsigned long
-raw_copy_from_user_key(void *to, const void __user *from, unsigned long size, unsigned long key)
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
+
+static uaccess_kmsan_or_inline __must_check unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long size)
 {
-	unsigned long rem;
-	union oac spec = {
-		.oac2.key = key,
-		.oac2.as = PSW_BITS_AS_SECONDARY,
-		.oac2.k = 1,
-		.oac2.a = 1,
-	};
+	unsigned long osize;
+	int cc;
 
-	asm_inline volatile(
-		"	lr	%%r0,%[spec]\n"
-		"0:	mvcos	0(%[to]),0(%[from]),%[size]\n"
-		"1:	jz	5f\n"
-		"	algr	%[size],%[val]\n"
-		"	slgr	%[from],%[val]\n"
-		"	slgr	%[to],%[val]\n"
-		"	j	0b\n"
-		"2:	la	%[rem],4095(%[from])\n" /* rem = from + 4095 */
-		"	nr	%[rem],%[val]\n"	/* rem = (from + 4095) & -4096 */
-		"	slgr	%[rem],%[from]\n"
-		"	clgr	%[size],%[rem]\n"	/* copy crosses next page boundary? */
-		"	jnh	6f\n"
-		"3:	mvcos	0(%[to]),0(%[from]),%[rem]\n"
-		"4:	slgr	%[size],%[rem]\n"
-		"	j	6f\n"
-		"5:	lghi	%[size],0\n"
-		"6:\n"
-		EX_TABLE(0b, 2b)
-		EX_TABLE(1b, 2b)
-		EX_TABLE(3b, 6b)
-		EX_TABLE(4b, 6b)
-		: [size] "+&a" (size), [from] "+&a" (from), [to] "+&a" (to), [rem] "=&a" (rem)
-		: [val] "a" (-4096UL), [spec] "d" (spec.val)
-		: "cc", "memory", "0");
-	return size;
+	while (1) {
+		osize = size;
+		asm_inline volatile(
+			"	lhi	%%r0,%[spec]\n"
+			"0:	mvcos	%[to],%[from],%[size]\n"
+			"1:	nopr	%%r7\n"
+			CC_IPM(cc)
+			EX_TABLE_UA_MVCOS_FROM(0b, 0b)
+			EX_TABLE_UA_MVCOS_FROM(1b, 0b)
+			: CC_OUT(cc, cc), [size] "+d" (size), [to] "=Q" (*(char *)to)
+			: [spec] "I" (0x81), [from] "Q" (*(const char __user *)from)
+			: CC_CLOBBER_LIST("memory", "0"));
+		if (__builtin_constant_p(osize) && osize <= 4096)
+			return osize - size;
+		if (likely(CC_TRANSFORM(cc) == 0))
+			return osize - size;
+		size -= 4096;
+		to += 4096;
+		from += 4096;
+	}
 }
 
-static __always_inline __must_check unsigned long
-raw_copy_from_user(void *to, const void __user *from, unsigned long n)
+static uaccess_kmsan_or_inline __must_check unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long size)
 {
-	return raw_copy_from_user_key(to, from, n, 0);
-}
+	unsigned long osize;
+	int cc;
 
-static __always_inline __must_check unsigned long
-raw_copy_to_user_key(void __user *to, const void *from, unsigned long size, unsigned long key)
-{
-	unsigned long rem;
-	union oac spec = {
-		.oac1.key = key,
-		.oac1.as = PSW_BITS_AS_SECONDARY,
-		.oac1.k = 1,
-		.oac1.a = 1,
-	};
-
-	asm_inline volatile(
-		"	lr	%%r0,%[spec]\n"
-		"0:	mvcos	0(%[to]),0(%[from]),%[size]\n"
-		"1:	jz	5f\n"
-		"	algr	%[size],%[val]\n"
-		"	slgr	%[to],%[val]\n"
-		"	slgr	%[from],%[val]\n"
-		"	j	0b\n"
-		"2:	la	%[rem],4095(%[to])\n"	/* rem = to + 4095 */
-		"	nr	%[rem],%[val]\n"	/* rem = (to + 4095) & -4096 */
-		"	slgr	%[rem],%[to]\n"
-		"	clgr	%[size],%[rem]\n"	/* copy crosses next page boundary? */
-		"	jnh	6f\n"
-		"3:	mvcos	0(%[to]),0(%[from]),%[rem]\n"
-		"4:	slgr	%[size],%[rem]\n"
-		"	j	6f\n"
-		"5:	lghi	%[size],0\n"
-		"6:\n"
-		EX_TABLE(0b, 2b)
-		EX_TABLE(1b, 2b)
-		EX_TABLE(3b, 6b)
-		EX_TABLE(4b, 6b)
-		: [size] "+&a" (size), [to] "+&a" (to), [from] "+&a" (from), [rem] "=&a" (rem)
-		: [val] "a" (-4096UL), [spec] "d" (spec.val)
-		: "cc", "memory", "0");
-	return size;
-}
-
-static __always_inline __must_check unsigned long
-raw_copy_to_user(void __user *to, const void *from, unsigned long n)
-{
-	return raw_copy_to_user_key(to, from, n, 0);
+	while (1) {
+		osize = size;
+		asm_inline volatile(
+			"	llilh	%%r0,%[spec]\n"
+			"0:	mvcos	%[to],%[from],%[size]\n"
+			"1:	nopr	%%r7\n"
+			CC_IPM(cc)
+			EX_TABLE_UA_MVCOS_TO(0b, 0b)
+			EX_TABLE_UA_MVCOS_TO(1b, 0b)
+			: CC_OUT(cc, cc), [size] "+d" (size), [to] "=Q" (*(char __user *)to)
+			: [spec] "I" (0x81), [from] "Q" (*(const char *)from)
+			: CC_CLOBBER_LIST("memory", "0"));
+		if (__builtin_constant_p(osize) && osize <= 4096)
+			return osize - size;
+		if (likely(CC_TRANSFORM(cc) == 0))
+			return osize - size;
+		size -= 4096;
+		to += 4096;
+		from += 4096;
+	}
 }
 
 unsigned long __must_check
···
 }
 
 int __noreturn __put_user_bad(void);
-
-#ifdef CONFIG_KMSAN
-#define uaccess_kmsan_or_inline noinline __maybe_unused __no_sanitize_memory
-#else
-#define uaccess_kmsan_or_inline __always_inline
-#endif
 
 #ifdef CONFIG_CC_HAS_ASM_GOTO_OUTPUT
 
···
 {									\
 	int rc;								\
 									\
-	asm volatile(							\
+	asm_inline volatile(						\
 		"	llilh	%%r0,%[spec]\n"				\
 		"0:	mvcos	%[to],%[from],%[size]\n"		\
 		"1:	lhi	%[rc],0\n"				\
···
 {									\
 	int rc;								\
 									\
-	asm volatile(							\
+	asm_inline volatile(						\
 		"	lhi	%%r0,%[spec]\n"				\
 		"0:	mvcos	%[to],%[from],%[size]\n"		\
 		"1:	lhi	%[rc],0\n"				\
···
 
 long __must_check strnlen_user(const char __user *src, long count);
 
-/*
- * Zero Userspace
- */
-unsigned long __must_check __clear_user(void __user *to, unsigned long size);
+static uaccess_kmsan_or_inline __must_check unsigned long
+__clear_user(void __user *to, unsigned long size)
+{
+	unsigned long osize;
+	int cc;
 
-static inline unsigned long __must_check clear_user(void __user *to, unsigned long n)
+	while (1) {
+		osize = size;
+		asm_inline volatile(
+			"	llilh	%%r0,%[spec]\n"
+			"0:	mvcos	%[to],%[from],%[size]\n"
+			"1:	nopr	%%r7\n"
+			CC_IPM(cc)
+			EX_TABLE_UA_MVCOS_TO(0b, 0b)
+			EX_TABLE_UA_MVCOS_TO(1b, 0b)
+			: CC_OUT(cc, cc), [size] "+d" (size), [to] "=Q" (*(char __user *)to)
+			: [spec] "I" (0x81), [from] "Q" (*(const char *)empty_zero_page)
+			: CC_CLOBBER_LIST("memory", "0"));
+		if (__builtin_constant_p(osize) && osize <= 4096)
+			return osize - size;
+		if (CC_TRANSFORM(cc) == 0)
+			return osize - size;
+		size -= 4096;
+		to += 4096;
+	}
+}
+
+static __always_inline unsigned long __must_check clear_user(void __user *to, unsigned long n)
 {
 	might_fault();
 	return __clear_user(to, n);
···
 		_old = ((unsigned int)old & 0xff) << shift;
 		_new = ((unsigned int)new & 0xff) << shift;
 		mask = ~(0xff << shift);
-		asm volatile(
+		asm_inline volatile(
 			"	spka	0(%[key])\n"
 			"	sacf	256\n"
 			"	llill	%[count],%[max_loops]\n"
···
 		_old = ((unsigned int)old & 0xffff) << shift;
 		_new = ((unsigned int)new & 0xffff) << shift;
 		mask = ~(0xffff << shift);
-		asm volatile(
+		asm_inline volatile(
 			"	spka	0(%[key])\n"
 			"	sacf	256\n"
 			"	llill	%[count],%[max_loops]\n"
···
 	case 4:	{
 		unsigned int prev = old;
 
-		asm volatile(
+		asm_inline volatile(
 			"	spka	0(%[key])\n"
 			"	sacf	256\n"
 			"0:	cs	%[prev],%[new],%[address]\n"
···
 	case 8: {
 		unsigned long prev = old;
 
-		asm volatile(
+		asm_inline volatile(
 			"	spka	0(%[key])\n"
 			"	sacf	256\n"
 			"0:	csg	%[prev],%[new],%[address]\n"
···
 	case 16: {
 		__uint128_t prev = old;
 
-		asm volatile(
+		asm_inline volatile(
 			"	spka	0(%[key])\n"
 			"	sacf	256\n"
 			"0:	cdsg	%[prev],%[new],%[address]\n"

arch/s390/include/asm/word-at-a-time.h

···
 {
 	unsigned long data;
 
-	asm volatile(
+	asm_inline volatile(
 		"0:	lg	%[data],0(%[addr])\n"
 		"1:	nopr	%%r7\n"
 		EX_TABLE_ZEROPAD(0b, 1b, %[data], %[addr])

arch/s390/kernel/abs_lowcore.c

···
 #include <asm/sections.h>
 
 unsigned long __bootdata_preserved(__abs_lowcore);
-int __bootdata_preserved(relocate_lowcore);
 
 int abs_lowcore_map(int cpu, struct lowcore *lc, bool alloc)
 {

arch/s390/kernel/alternative.c

···
 // SPDX-License-Identifier: GPL-2.0
 
+#ifndef pr_fmt
+#define pr_fmt(fmt)	"alt: " fmt
+#endif
+
 #include <linux/uaccess.h>
+#include <linux/printk.h>
 #include <asm/nospec-branch.h>
 #include <asm/abs_lowcore.h>
 #include <asm/alternative.h>
 #include <asm/facility.h>
+#include <asm/sections.h>
+#include <asm/machine.h>
+
+#ifndef a_debug
+#define a_debug		pr_debug
+#endif
+
+#ifndef __kernel_va
+#define __kernel_va(x)	(void *)(x)
+#endif
+
+unsigned long __bootdata_preserved(machine_features[1]);
+
+struct alt_debug {
+	unsigned long facilities[MAX_FACILITY_BIT / BITS_PER_LONG];
+	unsigned long mfeatures[MAX_MFEATURE_BIT / BITS_PER_LONG];
+	int spec;
+};
+
+static struct alt_debug __bootdata_preserved(alt_debug);
+
+static void alternative_dump(u8 *old, u8 *new, unsigned int len, unsigned int type, unsigned int data)
+{
+	char oinsn[33], ninsn[33];
+	unsigned long kptr;
+	unsigned int pos;
+
+	for (pos = 0; pos < len && 2 * pos < sizeof(oinsn) - 3; pos++)
+		hex_byte_pack(&oinsn[2 * pos], old[pos]);
+	oinsn[2 * pos] = 0;
+	for (pos = 0; pos < len && 2 * pos < sizeof(ninsn) - 3; pos++)
+		hex_byte_pack(&ninsn[2 * pos], new[pos]);
+	ninsn[2 * pos] = 0;
+	kptr = (unsigned long)__kernel_va(old);
+	a_debug("[%d/%3d] %016lx: %s -> %s\n", type, data, kptr, oinsn, ninsn);
+}
 
 void __apply_alternatives(struct alt_instr *start, struct alt_instr *end, unsigned int ctx)
 {
-	u8 *instr, *replacement;
+	struct alt_debug *d;
 	struct alt_instr *a;
-	bool replace;
+	bool debug, replace;
+	u8 *old, *new;
 
 	/*
 	 * The scan order should be from start to end. A later scanned
 	 * alternative code can overwrite previously scanned alternative code.
 	 */
+	d = &alt_debug;
 	for (a = start; a < end; a++) {
 		if (!(a->ctx & ctx))
 			continue;
 		switch (a->type) {
 		case ALT_TYPE_FACILITY:
 			replace = test_facility(a->data);
+			debug = __test_facility(a->data, d->facilities);
+			break;
+		case ALT_TYPE_FEATURE:
+			replace = test_machine_feature(a->data);
+			debug = __test_machine_feature(a->data, d->mfeatures);
 			break;
 		case ALT_TYPE_SPEC:
 			replace = nobp_enabled();
-			break;
-		case ALT_TYPE_LOWCORE:
-			replace = have_relocated_lowcore();
+			debug = d->spec;
 			break;
 		default:
 			replace = false;
+			debug = false;
 		}
 		if (!replace)
 			continue;
-		instr = (u8 *)&a->instr_offset + a->instr_offset;
-		replacement = (u8 *)&a->repl_offset + a->repl_offset;
-		s390_kernel_write(instr, replacement, a->instrlen);
+		old = (u8 *)&a->instr_offset + a->instr_offset;
+		new = (u8 *)&a->repl_offset + a->repl_offset;
+		if (debug)
+			alternative_dump(old, new, a->instrlen, a->type, a->data);
+		s390_kernel_write(old, new, a->instrlen);
 	}
 }

arch/s390/kernel/asm-offsets.c

···
 	OFFSET(__PT_R14, pt_regs, gprs[14]);
 	OFFSET(__PT_R15, pt_regs, gprs[15]);
 	OFFSET(__PT_ORIG_GPR2, pt_regs, orig_gpr2);
+	OFFSET(__PT_INT_CODE, pt_regs, int_code);
 	OFFSET(__PT_FLAGS, pt_regs, flags);
 	OFFSET(__PT_CR1, pt_regs, cr1);
 	OFFSET(__PT_LAST_BREAK, pt_regs, last_break);
···
 	OFFSET(__LC_EXT_CPU_ADDR, lowcore, ext_cpu_addr);
 	OFFSET(__LC_EXT_INT_CODE, lowcore, ext_int_code);
 	OFFSET(__LC_PGM_ILC, lowcore, pgm_ilc);
-	OFFSET(__LC_PGM_INT_CODE, lowcore, pgm_code);
+	OFFSET(__LC_PGM_CODE, lowcore, pgm_code);
+	OFFSET(__LC_PGM_INT_CODE, lowcore, pgm_int_code);
 	OFFSET(__LC_DATA_EXC_CODE, lowcore, data_exc_code);
 	OFFSET(__LC_MON_CLASS_NR, lowcore, mon_class_num);
 	OFFSET(__LC_PER_CODE, lowcore, per_code);
···
 	OFFSET(__LC_LAST_UPDATE_TIMER, lowcore, last_update_timer);
 	OFFSET(__LC_LAST_UPDATE_CLOCK, lowcore, last_update_clock);
 	OFFSET(__LC_INT_CLOCK, lowcore, int_clock);
-	OFFSET(__LC_BOOT_CLOCK, lowcore, boot_clock);
 	OFFSET(__LC_CURRENT, lowcore, current_task);
 	OFFSET(__LC_KERNEL_STACK, lowcore, kernel_stack);
 	OFFSET(__LC_ASYNC_STACK, lowcore, async_stack);

arch/s390/kernel/cert_store.c

···
 {
 	union register_pair rp = { .even = (unsigned long)addr, };
 
-	asm volatile(
+	asm_inline volatile(
 		"	diag	%[rp],%[subcode],0x320\n"
 		"0:	nopr	%%r7\n"
 		EX_TABLE(0b, 0b)

arch/s390/kernel/diag/diag.c

···
 {
 	union register_pair rp = { .even = *subcode, .odd = size };
 
-	asm volatile(
+	asm_inline volatile(
 		"	diag	%[addr],%[rp],0x204\n"
 		"0:	nopr	%%r7\n"
 		EX_TABLE(0b,0b)
···
 	int rc = -EOPNOTSUPP;
 
 	diag_stat_inc(DIAG_STAT_X224);
-	asm volatile("\n"
+	asm_inline volatile("\n"
 		"	diag	%[type],%[addr],0x224\n"
 		"0:	lhi	%[rc],0\n"
 		"1:\n"

arch/s390/kernel/early.c

···
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
 #include <linux/sched/debug.h>
+#include <linux/cpufeature.h>
 #include <linux/compiler.h>
 #include <linux/init.h>
 #include <linux/errno.h>
···
 #include <asm/asm-extable.h>
 #include <linux/memblock.h>
 #include <asm/access-regs.h>
+#include <asm/machine.h>
 #include <asm/diag.h>
 #include <asm/ebcdic.h>
 #include <asm/fpu.h>
···
 #include <asm/boot_data.h>
 #include "entry.h"
 
-#define decompressor_handled_param(param)			\
-static int __init ignore_decompressor_param_##param(char *s)	\
+#define __decompressor_handled_param(func, param)		\
+static int __init ignore_decompressor_param_##func(char *s)	\
 {								\
 	return 0;						\
 }								\
-early_param(#param, ignore_decompressor_param_##param)
+early_param(#param, ignore_decompressor_param_##func)
+
+#define decompressor_handled_param(param) __decompressor_handled_param(param, param)
 
 decompressor_handled_param(mem);
 decompressor_handled_param(vmalloc);
···
 decompressor_handled_param(cmma);
 decompressor_handled_param(relocate_lowcore);
 decompressor_handled_param(bootdebug);
+__decompressor_handled_param(debug_alternative, debug-alternative);
 #if IS_ENABLED(CONFIG_KVM)
 decompressor_handled_param(prot_virt);
 #endif
···
 	init_task.kasan_depth = 0;
 	pr_info("KernelAddressSanitizer initialized\n");
 #endif
-}
-
-static void __init reset_tod_clock(void)
-{
-	union tod_clock clk;
-
-	if (store_tod_clock_ext_cc(&clk) == 0)
-		return;
-	/* TOD clock not running. Set the clock to Unix Epoch. */
-	if (set_tod_clock(TOD_UNIX_EPOCH) || store_tod_clock_ext_cc(&clk))
-		disabled_wait();
-
-	memset(&tod_clock_base, 0, sizeof(tod_clock_base));
-	tod_clock_base.tod = TOD_UNIX_EPOCH;
-	get_lowcore()->last_update_clock = TOD_UNIX_EPOCH;
 }
 
 /*
···
 }
 
 static __initdata char sysinfo_page[PAGE_SIZE] __aligned(PAGE_SIZE);
-
-static noinline __init void detect_machine_type(void)
-{
-	struct sysinfo_3_2_2 *vmms = (struct sysinfo_3_2_2 *)&sysinfo_page;
-
-	/* Check current-configuration-level */
-	if (stsi(NULL, 0, 0, 0) <= 2) {
-		get_lowcore()->machine_flags |= MACHINE_FLAG_LPAR;
-		return;
-	}
-	/* Get virtual-machine cpu information. */
-	if (stsi(vmms, 3, 2, 2) || !vmms->count)
-		return;
-
-	/* Detect known hypervisors */
-	if (!memcmp(vmms->vm[0].cpi, "\xd2\xe5\xd4", 3))
-		get_lowcore()->machine_flags |= MACHINE_FLAG_KVM;
-	else if (!memcmp(vmms->vm[0].cpi, "\xa9\x61\xe5\xd4", 4))
-		get_lowcore()->machine_flags |= MACHINE_FLAG_VM;
-}
 
 /* Remove leading, trailing and double whitespace. */
 static inline void strim_all(char *str)
···
 		strim_all(hvstr);
 	} else {
 		sprintf(hvstr, "%s",
-			MACHINE_IS_LPAR ? "LPAR" :
-			MACHINE_IS_VM ? "z/VM" :
-			MACHINE_IS_KVM ? "KVM" : "unknown");
+			machine_is_lpar() ? "LPAR" :
+			machine_is_vm() ? "z/VM" :
+			machine_is_kvm() ? "KVM" : "unknown");
 	}
 	dump_stack_set_arch_desc("%s (%s)", mstr, hvstr);
 }
···
 {
 	int max_mnest;
 
-	if (!test_facility(11))
+	if (!cpu_has_topology())
 		return;
-	get_lowcore()->machine_flags |= MACHINE_FLAG_TOPOLOGY;
 	for (max_mnest = 6; max_mnest > 1; max_mnest--) {
 		if (stsi(&sysinfo_page, 15, 1, max_mnest) == 0)
 			break;
···
 	lc->return_mcck_lpswe = gen_lpswe(__LC_RETURN_MCCK_PSW);
 }
 
-static __init void detect_diag9c(void)
-{
-	unsigned int cpu_address;
-	int rc;
-
-	cpu_address = stap();
-	diag_stat_inc(DIAG_STAT_X09C);
-	asm volatile(
-		"	diag	%2,0,0x9c\n"
-		"0:	la	%0,0\n"
-		"1:\n"
-		EX_TABLE(0b,1b)
-		: "=d" (rc) : "0" (-EOPNOTSUPP), "d" (cpu_address) : "cc");
-	if (!rc)
-		get_lowcore()->machine_flags |= MACHINE_FLAG_DIAG9C;
-}
-
-static __init void detect_machine_facilities(void)
-{
-	if (test_facility(8)) {
-		get_lowcore()->machine_flags |= MACHINE_FLAG_EDAT1;
-		system_ctl_set_bit(0, CR0_EDAT_BIT);
-	}
-	if (test_facility(78))
-		get_lowcore()->machine_flags |= MACHINE_FLAG_EDAT2;
-	if (test_facility(3))
-		get_lowcore()->machine_flags |= MACHINE_FLAG_IDTE;
-	if (test_facility(50) && test_facility(73)) {
-		get_lowcore()->machine_flags |= MACHINE_FLAG_TE;
-		system_ctl_set_bit(0, CR0_TRANSACTIONAL_EXECUTION_BIT);
-	}
-	if (test_facility(51))
-		get_lowcore()->machine_flags |= MACHINE_FLAG_TLB_LC;
-	if (test_facility(129))
-		system_ctl_set_bit(0, CR0_VECTOR_BIT);
-	if (test_facility(130))
-		get_lowcore()->machine_flags |= MACHINE_FLAG_NX;
-	if (test_facility(133))
-		get_lowcore()->machine_flags |= MACHINE_FLAG_GS;
-	if (test_facility(139) && (tod_clock_base.tod >> 63)) {
-		/* Enabled signed clock comparator comparisons */
-		get_lowcore()->machine_flags |= MACHINE_FLAG_SCC;
-		clock_comparator_max = -1ULL >> 1;
-		system_ctl_set_bit(0, CR0_CLOCK_COMPARATOR_SIGN_BIT);
-	}
-	if (IS_ENABLED(CONFIG_PCI) && test_facility(153)) {
-		get_lowcore()->machine_flags |= MACHINE_FLAG_PCI_MIO;
-		/* the control bit is set during PCI initialization */
-	}
-	if (test_facility(194))
-		get_lowcore()->machine_flags |= MACHINE_FLAG_RDP;
-	if (test_facility(85))
-		get_lowcore()->machine_flags |= MACHINE_FLAG_SEQ_INSN;
-}
-
 static inline void save_vector_registers(void)
 {
 #ifdef CONFIG_CRASH_DUMP
-	if (test_facility(129))
+	if (cpu_has_vx())
 		save_vx_regs(boot_cpu_vector_save_area);
 #endif
 }
···
 void __init startup_init(void)
 {
 	kasan_early_init();
-	reset_tod_clock();
 	time_early_init();
 	init_kernel_storage_key();
 	lockdep_off();
 	sort_amode31_extable();
 	setup_lowcore_early();
-	detect_machine_type();
 	setup_arch_string();
 	setup_boot_command_line();
-	detect_diag9c();
-	detect_machine_facilities();
 	save_vector_registers();
 	setup_topology();
 	sclp_early_detect();

arch/s390/kernel/entry.S

···
 #include <asm/nmi.h>
 #include <asm/nospec-insn.h>
 #include <asm/lowcore.h>
+#include <asm/machine.h>
 
 _LPP_OFFSET	= __LC_LPP
 
···
 	ALTERNATIVE_2 "b \lpswe;nopr", \
 		".insn siy,0xeb0000000071,\address,0", ALT_FACILITY(193),		\
 		__stringify(.insn siy,0xeb0000000071,LOWCORE_ALT_ADDRESS+\address,0),	\
-		ALT_LOWCORE
+		ALT_FEATURE(MFEATURE_LOWCORE)
 	.endm
 
 	.macro MBEAR reg, lowcore
···
 	clg	%r14,__LC_RESTART_STACK(\lowcore)
 	je	\oklabel
 	la	%r14,\savearea(\lowcore)
-	j	stack_overflow
+	j	stack_invalid
 	.endm
 
 	/*
···
 	tm	__LC_PGM_ILC+3(%r13),0x80	# check for per exception
 	jnz	.Lpgm_svcper		# -> single stepped svc
 2:	aghi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
-	# CHECK_VMAP_STACK branches to stack_overflow or 4f
+	# CHECK_VMAP_STACK branches to stack_invalid or 4f
 	CHECK_VMAP_STACK __LC_SAVE_AREA,%r13,4f
 3:	lg	%r15,__LC_KERNEL_STACK(%r13)
 4:	la	%r11,STACK_FRAME_OVERHEAD(%r15)
···
 	.section .kprobes.text, "ax"
 
 /*
- * The synchronous or the asynchronous stack overflowed. We are dead.
+ * The synchronous or the asynchronous stack pointer is invalid. We are dead.
  * No need to properly save the registers, we are going to panic anyway.
  * Setup a pt_regs so that show_trace can provide a good call trace.
  */
-SYM_CODE_START(stack_overflow)
+SYM_CODE_START(stack_invalid)
 	GET_LC	%r15
 	lg	%r15,__LC_NODAT_STACK(%r15) # change to panic stack
 	la	%r11,STACK_FRAME_OVERHEAD(%r15)
···
 	stg	%r10,__PT_ORIG_GPR2(%r11) # store last break to orig_gpr2
 	xc	__SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
 	lgr	%r2,%r11		# pass pointer to pt_regs
-	jg	kernel_stack_overflow
-SYM_CODE_END(stack_overflow)
+	jg	kernel_stack_invalid
+SYM_CODE_END(stack_invalid)
 
 	.section .data, "aw"
 	.balign	4
···
 	.balign	8
 #define SYSCALL(esame,emu)	.quad __s390x_ ## esame
 SYM_DATA_START(sys_call_table)
-#include "asm/syscall_table.h"
+#include <asm/syscall_table.h>
 SYM_DATA_END(sys_call_table)
 #undef SYSCALL
 
···
 
 #define SYSCALL(esame,emu)	.quad __s390_ ## emu
 SYM_DATA_START(sys_call_table_emu)
-#include "asm/syscall_table.h"
+#include <asm/syscall_table.h>
 SYM_DATA_END(sys_call_table_emu)
 #undef SYSCALL
 #endif

arch/s390/kernel/entry.h

···
 void do_non_secure_storage_access(struct pt_regs *regs);
 void do_secure_storage_violation(struct pt_regs *regs);
 void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str);
-void kernel_stack_overflow(struct pt_regs * regs);
+void kernel_stack_invalid(struct pt_regs *regs);
 void handle_signal32(struct ksignal *ksig, sigset_t *oldset,
 		     struct pt_regs *regs);
 

arch/s390/kernel/ftrace.c

···
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/kmsan-checks.h>
+#include <linux/cpufeature.h>
 #include <linux/kprobes.h>
 #include <linux/execmem.h>
 #include <trace/syscall.h>
···
 
 bool ftrace_need_init_nop(void)
 {
-	return !MACHINE_HAS_SEQ_INSN;
+	return !cpu_has_seq_insn();
 }
 
 int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec)
···
 int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
 		       unsigned long addr)
 {
-	if (MACHINE_HAS_SEQ_INSN)
+	if (cpu_has_seq_insn())
 		return ftrace_patch_branch_insn(rec->ip, old_addr, addr);
 	else
 		return ftrace_modify_trampoline_call(rec, old_addr, addr);
···
 int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
 		    unsigned long addr)
 {
-	/* Expect brcl 0xf,... for the !MACHINE_HAS_SEQ_INSN case */
-	if (MACHINE_HAS_SEQ_INSN)
+	/* Expect brcl 0xf,... for the !cpu_has_seq_insn() case */
+	if (cpu_has_seq_insn())
 		return ftrace_patch_branch_insn(rec->ip, addr, 0);
 	else
 		return ftrace_patch_branch_mask((void *)rec->ip, 0xc0f4, false);
···
 
 int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
 {
-	if (MACHINE_HAS_SEQ_INSN)
+	if (cpu_has_seq_insn())
 		return ftrace_patch_branch_insn(rec->ip, 0, addr);
 	else
 		return ftrace_make_trampoline_call(rec, addr);

arch/s390/kernel/guarded_storage.c

···
  * Author(s): Martin Schwidefsky <[e-mail]>
  */
 
+#include <linux/cpufeature.h>
 #include <linux/kernel.h>
 #include <linux/syscalls.h>
 #include <linux/signal.h>
···
 SYSCALL_DEFINE2(s390_guarded_storage, int, command,
 		struct gs_cb __user *, gs_cb)
 {
-	if (!MACHINE_HAS_GS)
+	if (!cpu_has_gs())
 		return -EOPNOTSUPP;
 	switch (command) {
 	case GS_ENABLE:

arch/s390/kernel/head64.S

···
 
 __HEAD
 SYM_CODE_START(startup_continue)
-	larl	%r1,tod_clock_base
-	GET_LC	%r2
-	mvc	0(16,%r1),__LC_BOOT_CLOCK(%r2)
 #
 # Setup stack
 #
+	GET_LC	%r2
 	larl	%r14,init_task
 	stg	%r14,__LC_CURRENT(%r2)
 	larl	%r15,init_thread_union+STACK_INIT_OFFSET

arch/s390/kernel/hiperdispatch.c

···
  * therefore delaying the throughput loss caused by using SMP threads.
  */
 
+#include <linux/cpufeature.h>
 #include <linux/cpumask.h>
 #include <linux/debugfs.h>
 #include <linux/device.h>
···
 
 static int hd_set_hiperdispatch_mode(int enable)
 {
-	if (!MACHINE_HAS_TOPOLOGY)
+	if (!cpu_has_topology())
 		enable = 0;
 	if (hd_enabled == enable)
 		return 0;

arch/s390/kernel/ipl.c

···
 #include <linux/debug_locks.h>
 #include <linux/vmalloc.h>
 #include <asm/asm-extable.h>
+#include <asm/machine.h>
 #include <asm/diag.h>
 #include <asm/ipl.h>
 #include <asm/smp.h>
···
 
 	r1.even = addr;
 	r1.odd	= 0;
-	asm volatile(
+	asm_inline volatile(
 		"	diag	%[r1],%[subcode],0x308\n"
 		"0:	nopr	%%r7\n"
 		EX_TABLE(0b,0b)
···
 		goto out;
 	switch (ipl_info.type) {
 	case IPL_TYPE_CCW:
-		if (MACHINE_IS_VM)
+		if (machine_is_vm())
 			rc = sysfs_create_group(&ipl_kset->kobj,
 						&ipl_ccw_attr_group_vm);
 		else
···
 	ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM;
 
 	/* VM PARM */
-	if (MACHINE_IS_VM && ipl_block_valid &&
+	if (machine_is_vm() && ipl_block_valid &&
 	    (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) {
 
 		ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
···
 {
 	int rc;
 
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return 0;
 
 	reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
···
 		return -ENOMEM;
 
 	rc = sysfs_create_group(&reipl_kset->kobj,
-				MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
-					      : &reipl_ccw_attr_group_lpar);
+				machine_is_vm() ? &reipl_ccw_attr_group_vm
+						: &reipl_ccw_attr_group_lpar);
 	if (rc)
 		return rc;
 
···
 
 static int vmcmd_init(void)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return -EOPNOTSUPP;
 	vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
 	if (!vmcmd_kset)
···
 
 static int __init vmcmd_on_reboot_setup(char *str)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return 1;
 	strncpy_skip_quote(vmcmd_on_reboot, str, VMCMD_MAX_SIZE);
 	vmcmd_on_reboot[VMCMD_MAX_SIZE] = 0;
···
 
 static int __init vmcmd_on_panic_setup(char *str)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return 1;
 	strncpy_skip_quote(vmcmd_on_panic, str, VMCMD_MAX_SIZE);
 	vmcmd_on_panic[VMCMD_MAX_SIZE] = 0;
···
 
 static int __init vmcmd_on_halt_setup(char *str)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return 1;
 	strncpy_skip_quote(vmcmd_on_halt, str, VMCMD_MAX_SIZE);
 	vmcmd_on_halt[VMCMD_MAX_SIZE] = 0;
···
 
 static int __init vmcmd_on_poff_setup(char *str)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return 1;
 	strncpy_skip_quote(vmcmd_on_poff, str, VMCMD_MAX_SIZE);
 	vmcmd_on_poff[VMCMD_MAX_SIZE] = 0;

arch/s390/kernel/irq.c

···
  */
 
 #include <linux/kernel_stat.h>
+#include <linux/cpufeature.h>
 #include <linux/interrupt.h>
 #include <linux/seq_file.h>
 #include <linux/proc_fs.h>
···
 #include <asm/irq_regs.h>
 #include <asm/cputime.h>
 #include <asm/lowcore.h>
+#include <asm/machine.h>
 #include <asm/irq.h>
 #include <asm/hw_irq.h>
 #include <asm/stacktrace.h>
···
 
 	if (user_mode(regs)) {
 		update_timer_sys();
-		if (static_branch_likely(&cpu_has_bear))
+		if (cpu_has_bear())
 			current->thread.last_break = regs->last_break;
 	}
 
···
 			do_irq_async(regs, THIN_INTERRUPT);
 		else
 			do_irq_async(regs, IO_INTERRUPT);
-	} while (MACHINE_IS_LPAR && irq_pending(regs));
+	} while (machine_is_lpar() && irq_pending(regs));
 
 	irq_exit_rcu();
 
···
 
 	if (user_mode(regs)) {
 		update_timer_sys();
-		if (static_branch_likely(&cpu_has_bear))
+		if (cpu_has_bear())
 			current->thread.last_break = regs->last_break;
 	}
 

arch/s390/kernel/kprobes.c

···
 #include <linux/ptrace.h>
 #include <linux/preempt.h>
 #include <linux/stop_machine.h>
+#include <linux/cpufeature.h>
 #include <linux/kdebug.h>
 #include <linux/uaccess.h>
 #include <linux/extable.h>
···
 {
 	struct swap_insn_args args = {.p = p, .arm_kprobe = 1};
 
-	if (MACHINE_HAS_SEQ_INSN) {
+	if (cpu_has_seq_insn()) {
 		swap_instruction(&args);
 		text_poke_sync();
 	} else {
···
 {
 	struct swap_insn_args args = {.p = p, .arm_kprobe = 0};
 
-	if (MACHINE_HAS_SEQ_INSN) {
+	if (cpu_has_seq_insn()) {
 		swap_instruction(&args);
 		text_poke_sync();
 	} else {

arch/s390/kernel/machine_kexec.c

···
 #include <linux/reboot.h>
 #include <linux/ftrace.h>
 #include <linux/debug_locks.h>
+#include <linux/cpufeature.h>
 #include <asm/guarded_storage.h>
+#include <asm/machine.h>
 #include <asm/pfault.h>
 #include <asm/cio.h>
 #include <asm/fpu.h>
···
 	mcesa = __va(get_lowcore()->mcesad & MCESA_ORIGIN_MASK);
 	if (cpu_has_vx())
 		save_vx_regs((__vector128 *) mcesa->vector_save_area);
-	if (MACHINE_HAS_GS) {
+	if (cpu_has_gs()) {
 		local_ctl_store(2, &cr2_old.reg);
 		cr2_new = cr2_old;
 		cr2_new.gse = 1;
···
 static int machine_kexec_prepare_kdump(void)
 {
 #ifdef CONFIG_CRASH_DUMP
-	if (MACHINE_IS_VM)
+	if (machine_is_vm())
 		diag10_range(PFN_DOWN(crashk_res.start),
 			     PFN_DOWN(crashk_res.end - crashk_res.start + 1));
 	return 0;

arch/s390/kernel/nmi.c

···
  */
 
 #include <linux/kernel_stat.h>
+#include <linux/cpufeature.h>
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/entry-common.h>
···
 
 static inline int nmi_needs_mcesa(void)
 {
-	return cpu_has_vx() || MACHINE_HAS_GS;
+	return cpu_has_vx() || cpu_has_gs();
 }
 
 /*
···
 	if (!nmi_needs_mcesa())
 		return;
 	*mcesad = __pa(&boot_mcesa);
-	if (MACHINE_HAS_GS)
+	if (cpu_has_gs())
 		*mcesad |= ilog2(MCESA_MAX_SIZE);
 }
 
···
 	*mcesad = 0;
 	if (!nmi_needs_mcesa())
 		return 0;
-	size = MACHINE_HAS_GS ? MCESA_MAX_SIZE : MCESA_MIN_SIZE;
+	size = cpu_has_gs() ? MCESA_MAX_SIZE : MCESA_MIN_SIZE;
 	origin = kmalloc(size, GFP_KERNEL);
 	if (!origin)
 		return -ENOMEM;
 	/* The pointer is stored with mcesa_bits ORed in */
 	kmemleak_not_leak(origin);
 	*mcesad = __pa(origin);
-	if (MACHINE_HAS_GS)
+	if (cpu_has_gs())
 		*mcesad |= ilog2(MCESA_MAX_SIZE);
 	return 0;
 }

arch/s390/kernel/processor.c

···
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
 #include <linux/stop_machine.h>
+#include <linux/cpufeature.h>
 #include <linux/bitops.h>
 #include <linux/kernel.h>
 #include <linux/random.h>
···
 #include <linux/cpu.h>
 #include <linux/smp.h>
 #include <asm/text-patching.h>
+#include <asm/machine.h>
 #include <asm/diag.h>
 #include <asm/facility.h>
 #include <asm/elf.h>
···
 		elf_hwcap |= HWCAP_DFP;
 
 	/* huge page support */
-	if (MACHINE_HAS_EDAT1)
+	if (cpu_has_edat1())
 		elf_hwcap |= HWCAP_HPAGE;
 
 	/* 64-bit register support for 31-bit processes */
 	elf_hwcap |= HWCAP_HIGH_GPRS;
 
 	/* transactional execution */
-	if (MACHINE_HAS_TE)
+	if (machine_has_tx())
 		elf_hwcap |= HWCAP_TE;
 
 	/* vector */
···
 		elf_hwcap |= HWCAP_NNPA;
 
 	/* guarded storage */
-	if (MACHINE_HAS_GS)
+	if (cpu_has_gs())
 		elf_hwcap |= HWCAP_GS;
 
-	if (MACHINE_HAS_PCI_MIO)
+	if (test_machine_feature(MFEATURE_PCI_MIO))
 		elf_hwcap |= HWCAP_PCI_MIO;
 
 	/* virtualization support */

arch/s390/kernel/ptrace.c

···
  *               Martin Schwidefsky ([e-mail])
  */
 
-#include "asm/ptrace.h"
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/sched/task_stack.h>
+#include <linux/cpufeature.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
 #include <linux/errno.h>
···
 #include <asm/unistd.h>
 #include <asm/runtime_instr.h>
 #include <asm/facility.h>
+#include <asm/machine.h>
+#include <asm/ptrace.h>
+#include <asm/rwonce.h>
 #include <asm/fpu.h>
 
 #include "entry.h"
···
 	cr0_new = cr0_old;
 	cr2_new = cr2_old;
 	/* Take care of the enable/disable of transactional execution. */
-	if (MACHINE_HAS_TE) {
+	if (machine_has_tx()) {
 		/* Set or clear transaction execution TXC bit 8. */
 		cr0_new.tcx = 1;
 		if (task->thread.per_flags & PER_FLAG_NO_TE)
···
 		}
 	}
 	/* Take care of enable/disable of guarded storage. */
-	if (MACHINE_HAS_GS) {
+	if (cpu_has_gs()) {
 		cr2_new.gse = 0;
 		if (task->thread.gs_cb)
 			cr2_new.gse = 1;
···
 	case PTRACE_GET_LAST_BREAK:
 		return put_user(child->thread.last_break, (unsigned long __user *)data);
 	case PTRACE_ENABLE_TE:
-		if (!MACHINE_HAS_TE)
+		if (!machine_has_tx())
 			return -EIO;
 		child->thread.per_flags &= ~PER_FLAG_NO_TE;
 		return 0;
 	case PTRACE_DISABLE_TE:
-		if (!MACHINE_HAS_TE)
+		if (!machine_has_tx())
 			return -EIO;
 		child->thread.per_flags |= PER_FLAG_NO_TE;
 		child->thread.per_flags &= ~PER_FLAG_TE_ABORT_RAND;
 		return 0;
 	case PTRACE_TE_ABORT_RAND:
-		if (!MACHINE_HAS_TE || (child->thread.per_flags & PER_FLAG_NO_TE))
+		if (!machine_has_tx() || (child->thread.per_flags & PER_FLAG_NO_TE))
 			return -EIO;
 		switch (data) {
 		case 0UL:
···
 {
 	struct gs_cb *data = target->thread.gs_cb;
 
-	if (!MACHINE_HAS_GS)
+	if (!cpu_has_gs())
 		return -ENODEV;
 	if (!data)
 		return -ENODATA;
···
 	struct gs_cb gs_cb = { }, *data = NULL;
 	int rc;
 
-	if (!MACHINE_HAS_GS)
+	if (!cpu_has_gs())
 		return -ENODEV;
 	if (!target->thread.gs_cb) {
 		data = kzalloc(sizeof(*data), GFP_KERNEL);
···
 {
 	struct gs_cb *data = target->thread.gs_bc_cb;
 
-	if (!MACHINE_HAS_GS)
+	if (!cpu_has_gs())
 		return -ENODEV;
 	if (!data)
 		return -ENODATA;
···
 {
 	struct gs_cb *data = target->thread.gs_bc_cb;
 
-	if (!MACHINE_HAS_GS)
+	if (!cpu_has_gs())
 		return -ENODEV;
 	if (!data) {
 		data = kzalloc(sizeof(*data), GFP_KERNEL);
···
 	addr = kernel_stack_pointer(regs) + n * sizeof(long);
 	if (!regs_within_kernel_stack(regs, addr))
 		return 0;
-	return *(unsigned long *)addr;
+	return READ_ONCE_NOCHECK(addr);
 }

arch/s390/kernel/setup.c

···
 
 #include <asm/archrandom.h>
 #include <asm/boot_data.h>
+#include <asm/machine.h>
 #include <asm/ipl.h>
 #include <asm/facility.h>
 #include <asm/smp.h>
···
 struct lowcore *lowcore_ptr[NR_CPUS];
 EXPORT_SYMBOL(lowcore_ptr);
 
-DEFINE_STATIC_KEY_FALSE(cpu_has_bear);
-
 /*
  * The Write Back bit position in the physaddr is given by the SLPC PCI.
  * Leaving the mask zero always uses write through which is safe
···
 	char query_buffer[1024];
 	char *ptr;
 
-        if (MACHINE_IS_VM) {
+	if (machine_is_vm()) {
 		cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL);
 		console_devno = simple_strtoul(query_buffer + 5, NULL, 16);
 		ptr = strstr(query_buffer, "SUBCHANNEL =");
···
 			SET_CONSOLE_SCLP;
 #endif
 		}
-	} else if (MACHINE_IS_KVM) {
+	} else if (machine_is_kvm()) {
 		if (sclp.has_vt220 && IS_ENABLED(CONFIG_SCLP_VT220_CONSOLE))
 			SET_CONSOLE_VT220;
 		else if (sclp.has_linemode && IS_ENABLED(CONFIG_SCLP_CONSOLE))
···
 		return;
 	}
 
-	if (!oldmem_data.start && MACHINE_IS_VM)
+	if (!oldmem_data.start && machine_is_vm())
 		diag10_range(PFN_DOWN(crash_base), PFN_DOWN(crash_size));
 	crashk_res.start = crash_base;
 	crashk_res.end = crash_base + crash_size - 1;
···
         /*
          * print what head.S has found out about the machine
          */
-	if (MACHINE_IS_VM)
+	if (machine_is_vm())
 		pr_info("Linux is running as a z/VM "
 			"guest operating system in 64-bit mode\n");
-	else if (MACHINE_IS_KVM)
+	else if (machine_is_kvm())
 		pr_info("Linux is running under KVM in 64-bit mode\n");
-	else if (MACHINE_IS_LPAR)
+	else if (machine_is_lpar())
 		pr_info("Linux is running natively in 64-bit mode\n");
 	else
 		pr_info("Linux is running as a guest in 64-bit mode\n");
···
 	if (!boot_earlyprintk)
 		boot_rb_foreach(print_rb_entry);
 
-	if (have_relocated_lowcore())
+	if (machine_has_relocated_lowcore())
 		pr_info("Lowcore relocated to 0x%px\n", get_lowcore());
 
 	log_component_list();
···
 	setup_uv();
 	dma_contiguous_reserve(ident_map_size);
 	vmcp_cma_reserve();
-	if (MACHINE_HAS_EDAT2)
+	if (cpu_has_edat2())
 		hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
 
 	reserve_crashkernel();
···
 	numa_setup();
 	smp_detect_cpus();
 	topology_init_early();
-
-	if (test_facility(193))
-		static_branch_enable(&cpu_has_bear);
-
 	setup_protection_map();
 	/*
 	 * Create kernel page tables.

arch/s390/kernel/smp.c

···
 #define KMSG_COMPONENT "cpu"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/cpufeature.h>
 #include <linux/workqueue.h>
 #include <linux/memblock.h>
 #include <linux/export.h>
···
 #include <linux/kprobes.h>
 #include <asm/access-regs.h>
 #include <asm/asm-offsets.h>
+#include <asm/machine.h>
 #include <asm/ctlreg.h>
 #include <asm/pfault.h>
 #include <asm/diag.h>
···
 
 void notrace smp_yield_cpu(int cpu)
 {
-	if (!MACHINE_HAS_DIAG9C)
+	if (!machine_has_diag9c())
 		return;
 	diag_stat_inc_norecursion(DIAG_STAT_X09C);
 	asm volatile("diag %0,0,0x9c"
···
 	if (__pcpu_sigp_relax(pcpu->address, SIGP_STORE_STATUS_AT_ADDRESS,
 			      pa) != SIGP_CC_ORDER_CODE_ACCEPTED)
 		return -EIO;
-	if (!cpu_has_vx() && !MACHINE_HAS_GS)
+	if (!cpu_has_vx() && !cpu_has_gs())
 		return 0;
 	pa = lc->mcesad & MCESA_ORIGIN_MASK;
-	if (MACHINE_HAS_GS)
+	if (cpu_has_gs())
 		pa |= lc->mcesad & MCESA_LC_MASK;
 	if (__pcpu_sigp_relax(pcpu->address, SIGP_STORE_ADDITIONAL_STATUS,
 			      pa) != SIGP_CC_ORDER_CODE_ACCEPTED)

arch/s390/kernel/syscall.c

···
  *  platform.
  */
 
+#include <linux/cpufeature.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
···
 	return -ENOSYS;
 }
 
-static void do_syscall(struct pt_regs *regs)
+void noinstr __do_syscall(struct pt_regs *regs, int per_trap)
 {
 	unsigned long nr;
 
+	add_random_kstack_offset();
+	enter_from_user_mode(regs);
+	regs->psw = get_lowcore()->svc_old_psw;
+	regs->int_code = get_lowcore()->svc_int_code;
+	update_timer_sys();
+	if (cpu_has_bear())
+		current->thread.last_break = regs->last_break;
+	local_irq_enable();
+	regs->orig_gpr2 = regs->gprs[2];
+	if (unlikely(per_trap))
+		set_thread_flag(TIF_PER_TRAP);
+	regs->flags = 0;
+	set_pt_regs_flag(regs, PIF_SYSCALL);
 	nr = regs->int_code & 0xffff;
-	if (!nr) {
+	if (likely(!nr)) {
 		nr = regs->gprs[1] & 0xffff;
 		regs->int_code &= ~0xffffUL;
 		regs->int_code |= nr;
 	}
-
 	regs->gprs[2] = nr;
-
 	if (nr == __NR_restart_syscall && !(current->restart_block.arch_data & 1)) {
 		regs->psw.addr = current->restart_block.arch_data;
 		current->restart_block.arch_data = 1;
 	}
 	nr = syscall_enter_from_user_mode_work(regs, nr);
-
 	/*
 	 * In the s390 ptrace ABI, both the syscall number and the return value
 	 * use gpr2. However, userspace puts the syscall number either in the
···
 	 * work, the ptrace code sets PIF_SYSCALL_RET_SET, which is checked here
 	 * and if set, the syscall will be skipped.
 	 */
-
 	if (unlikely(test_and_clear_pt_regs_flag(regs, PIF_SYSCALL_RET_SET)))
 		goto out;
 	regs->gprs[2] = -ENOSYS;
-	if (likely(nr >= NR_syscalls))
-		goto out;
-	do {
+	if (likely(nr < NR_syscalls))
 		regs->gprs[2] = current->thread.sys_call_table[nr](regs);
-	} while (test_and_clear_pt_regs_flag(regs, PIF_EXECVE_PGSTE_RESTART));
 out:
-	syscall_exit_to_user_mode_work(regs);
-}
-
-void noinstr __do_syscall(struct pt_regs *regs, int per_trap)
-{
-	add_random_kstack_offset();
-	enter_from_user_mode(regs);
-	regs->psw = get_lowcore()->svc_old_psw;
-	regs->int_code = get_lowcore()->svc_int_code;
-	update_timer_sys();
-	if (static_branch_likely(&cpu_has_bear))
-		current->thread.last_break = regs->last_break;
-
-	local_irq_enable();
-	regs->orig_gpr2 = regs->gprs[2];
-
-	if (per_trap)
-		set_thread_flag(TIF_PER_TRAP);
-
-	regs->flags = 0;
-	set_pt_regs_flag(regs, PIF_SYSCALL);
-	do_syscall(regs);
-	exit_to_user_mode();
+	syscall_exit_to_user_mode(regs);
 }

arch/s390/kernel/sysinfo.c

···
  *	       Martin Schwidefsky <[e-mail]>,
  */
 
+#include <linux/cpufeature.h>
 #include <linux/debugfs.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
···
 #include <linux/export.h>
 #include <linux/slab.h>
 #include <asm/asm-extable.h>
+#include <asm/machine.h>
 #include <asm/ebcdic.h>
 #include <asm/debug.h>
 #include <asm/sysinfo.h>
 #include <asm/cpcmd.h>
 #include <asm/topology.h>
 #include <asm/fpu.h>
+#include <asm/asm.h>
 
 int topology_max_mnest;
-
-static inline int __stsi(void *sysinfo, int fc, int sel1, int sel2, int *lvl)
-{
-	int r0 = (fc << 28) | sel1;
-	int rc = 0;
-
-	asm volatile(
-		"	lr	0,%[r0]\n"
-		"	lr	1,%[r1]\n"
-		"	stsi	0(%[sysinfo])\n"
-		"0:	jz	2f\n"
-		"1:	lhi	%[rc],%[retval]\n"
-		"2:	lr	%[r0],0\n"
-		EX_TABLE(0b, 1b)
-		: [r0] "+d" (r0), [rc] "+d" (rc)
-		: [r1] "d" (sel2),
-		  [sysinfo] "a" (sysinfo),
-		  [retval] "K" (-EOPNOTSUPP)
-		: "cc", "0", "1", "memory");
-	*lvl = ((unsigned int) r0) >> 28;
-	return rc;
-}
-
-/*
- * stsi - store system information
- *
- * Returns the current configuration level if function code 0 was specified.
- * Otherwise returns 0 on success or a negative value on error.
- */
-int stsi(void *sysinfo, int fc, int sel1, int sel2)
-{
-	int lvl, rc;
-
-	rc = __stsi(sysinfo, fc, sel1, sel2, &lvl);
-	if (rc)
-		return rc;
-	return fc ? 0 : lvl;
-}
-EXPORT_SYMBOL(stsi);
 
 #ifdef CONFIG_PROC_FS
 
···
 	int i;
 
 	seq_putc(m, '\n');
-	if (!MACHINE_HAS_TOPOLOGY)
+	if (!cpu_has_topology())
 		return;
 	if (stsi(info, 15, 1, topology_max_mnest))
 		return;
···
 static __init int create_proc_service_level(void)
 {
 	proc_create_seq("service_levels", 0, NULL, &service_level_seq_ops);
-	if (MACHINE_IS_VM)
+	if (machine_is_vm())
 		register_service_level(&service_level_vm);
 	return 0;
 }
···
 		sf = &stsi_file[i];
 		debugfs_create_file(sf->name, 0400, stsi_root, NULL, sf->fops);
 	}
-	if (IS_ENABLED(CONFIG_SCHED_TOPOLOGY) && MACHINE_HAS_TOPOLOGY) {
+	if (IS_ENABLED(CONFIG_SCHED_TOPOLOGY) && cpu_has_topology()) {
 		char link_to[10];
 
 		sprintf(link_to, "15_1_%d", topology_mnest_limit());

arch/s390/kernel/time.c

···
 #include <asm/cio.h>
 #include "entry.h"
 
-union tod_clock tod_clock_base __section(".data");
+union tod_clock __bootdata_preserved(tod_clock_base);
 EXPORT_SYMBOL_GPL(tod_clock_base);
 
-u64 clock_comparator_max = -1ULL;
+u64 __bootdata_preserved(clock_comparator_max);
 EXPORT_SYMBOL_GPL(clock_comparator_max);
 
 static DEFINE_PER_CPU(struct clock_event_device, comparators);

arch/s390/kernel/topology.c

···
 #define KMSG_COMPONENT "cpu"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/cpufeature.h>
 #include <linux/workqueue.h>
 #include <linux/memblock.h>
 #include <linux/uaccess.h>
···
 {
 	int cpu, rc;
 
-	if (!MACHINE_HAS_TOPOLOGY)
+	if (!cpu_has_topology())
 		return -EOPNOTSUPP;
 	if (fc)
 		rc = ptf(PTF_VERTICAL);
···
 	hd_status = 0;
 	rc = 0;
 	mutex_lock(&smp_cpu_state_mutex);
-	if (MACHINE_HAS_TOPOLOGY) {
+	if (cpu_has_topology()) {
 		rc = 1;
 		store_topology(info);
 		tl_to_masks(info);
 	}
 	update_cpu_masks();
-	if (!MACHINE_HAS_TOPOLOGY)
+	if (!cpu_has_topology())
 		topology_update_polarization_simple();
 	if (cpu_management == 1)
 		hd_status = hd_enable_hiperdispatch();
···
 
 void topology_expect_change(void)
 {
-	if (!MACHINE_HAS_TOPOLOGY)
+	if (!cpu_has_topology())
 		return;
 	/* This is racy, but it doesn't matter since it is just a heuristic.
 	 * Worst case is that we poll in a higher frequency for a bit longer.
···
 	int rc;
 
 	rc = sysfs_create_group(&cpu->dev.kobj, &topology_cpu_attr_group);
-	if (rc || !MACHINE_HAS_TOPOLOGY)
+	if (rc || !cpu_has_topology())
 		return rc;
 	rc = sysfs_create_group(&cpu->dev.kobj, &topology_extra_cpu_attr_group);
 	if (rc)
···
 
 	set_sched_topology(s390_topology);
 	if (topology_mode == TOPOLOGY_MODE_UNINITIALIZED) {
-		if (MACHINE_HAS_TOPOLOGY)
+		if (cpu_has_topology())
 			topology_mode = TOPOLOGY_MODE_HW;
 		else
 			topology_mode = TOPOLOGY_MODE_SINGLE;
 	}
-	if (!MACHINE_HAS_TOPOLOGY)
+	if (!cpu_has_topology())
 		goto out;
 	tl_info = memblock_alloc_or_panic(PAGE_SIZE, PAGE_SIZE);
 	info = tl_info;
···
 {
 	if (!enabled)
 		return TOPOLOGY_MODE_SINGLE;
-	return MACHINE_HAS_TOPOLOGY ? TOPOLOGY_MODE_HW : TOPOLOGY_MODE_PACKAGE;
+	return cpu_has_topology() ? TOPOLOGY_MODE_HW : TOPOLOGY_MODE_PACKAGE;
 }
 
 static inline int topology_is_enabled(void)
···
 	int rc = 0;
 
 	timer_setup(&topology_timer, topology_timer_fn, TIMER_DEFERRABLE);
-	if (MACHINE_HAS_TOPOLOGY)
+	if (cpu_has_topology())
 		set_topology_timer();
 	else
 		topology_update_polarization_simple();

arch/s390/kernel/traps.c

···
  *  S390 version
  *    Copyright IBM Corp. 1999, 2000
  *    Author(s): Martin Schwidefsky ([e-mail]),
- *               Denis Joseph Barrow ([e-mail],[e-mail]),
+ *		 Denis Joseph Barrow ([e-mail],[e-mail]),
  *
  *  Derived from "arch/i386/kernel/traps.c"
  *    Copyright (C) 1991, 1992 Linus Torvalds
  */
 
-/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'asm.s'.
- */
-#include "asm/irqflags.h"
-#include "asm/ptrace.h"
+#include <linux/cpufeature.h>
 #include <linux/kprobes.h>
 #include <linux/kdebug.h>
 #include <linux/randomize_kstack.h>
···
 #include <linux/entry-common.h>
 #include <linux/kmsan.h>
 #include <asm/asm-extable.h>
+#include <asm/irqflags.h>
+#include <asm/ptrace.h>
 #include <asm/vtime.h>
 #include <asm/fpu.h>
 #include <asm/fault.h>
···
 		address = current->thread.trap_tdb.data[3];
 	else
 		address = regs->psw.addr;
-	return (void __user *) (address - (regs->int_code >> 16));
+	return (void __user *)(address - (regs->int_code >> 16));
 }
 
 #ifdef CONFIG_GENERIC_BUG
···
 	if (user_mode(regs)) {
 		force_sig_fault(si_signo, si_code, get_trap_ip(regs));
 		report_user_fault(regs, si_signo, 0);
-        } else {
+	} else {
 		if (!fixup_exception(regs))
 			die(regs, str);
-        }
+	}
 }
 
 static void do_trap(struct pt_regs *regs, int si_signo, int si_code, char *str)
 {
-	if (notify_die(DIE_TRAP, str, regs, 0,
-		       regs->int_code, si_signo) == NOTIFY_STOP)
+	if (notify_die(DIE_TRAP, str, regs, 0, regs->int_code, si_signo) == NOTIFY_STOP)
 		return;
 	do_report_trap(regs, si_signo, si_code, str);
 }
···
 		return;
 	if (!current->ptrace)
 		return;
-	force_sig_fault(SIGTRAP, TRAP_HWBKPT,
-		(void __force __user *) current->thread.per_event.address);
+	force_sig_fault(SIGTRAP, TRAP_HWBKPT, (void __force __user *)current->thread.per_event.address);
 }
 NOKPROBE_SYMBOL(do_per_trap);
 
···
 	do_trap(regs, signr, sicode, str);	\
 }
 
-DO_ERROR_INFO(addressing_exception, SIGILL, ILL_ILLADR,
-	      "addressing exception")
-DO_ERROR_INFO(execute_exception, SIGILL, ILL_ILLOPN,
-	      "execute exception")
-DO_ERROR_INFO(divide_exception, SIGFPE, FPE_INTDIV,
-	      "fixpoint divide exception")
-DO_ERROR_INFO(overflow_exception, SIGFPE, FPE_INTOVF,
-	      "fixpoint overflow exception")
-DO_ERROR_INFO(hfp_overflow_exception, SIGFPE, FPE_FLTOVF,
-	      "HFP overflow exception")
-DO_ERROR_INFO(hfp_underflow_exception, SIGFPE, FPE_FLTUND,
-	      "HFP underflow exception")
-DO_ERROR_INFO(hfp_significance_exception, SIGFPE, FPE_FLTRES,
-	      "HFP significance exception")
-DO_ERROR_INFO(hfp_divide_exception, SIGFPE, FPE_FLTDIV,
-	      "HFP divide exception")
-DO_ERROR_INFO(hfp_sqrt_exception, SIGFPE, FPE_FLTINV,
-	      "HFP square root exception")
-DO_ERROR_INFO(operand_exception, SIGILL, ILL_ILLOPN,
-	      "operand exception")
-DO_ERROR_INFO(privileged_op, SIGILL, ILL_PRVOPC,
-	      "privileged operation")
-DO_ERROR_INFO(special_op_exception, SIGILL, ILL_ILLOPN,
-	      "special operation exception")
-DO_ERROR_INFO(transaction_exception, SIGILL, ILL_ILLOPN,
-	      "transaction constraint exception")
+DO_ERROR_INFO(addressing_exception, SIGILL, ILL_ILLADR, "addressing exception")
+DO_ERROR_INFO(divide_exception, SIGFPE, FPE_INTDIV, "fixpoint divide exception")
+DO_ERROR_INFO(execute_exception, SIGILL, ILL_ILLOPN, "execute exception")
+DO_ERROR_INFO(hfp_divide_exception, SIGFPE, FPE_FLTDIV, "HFP divide exception")
+DO_ERROR_INFO(hfp_overflow_exception, SIGFPE, FPE_FLTOVF, "HFP overflow exception")
+DO_ERROR_INFO(hfp_significance_exception, SIGFPE, FPE_FLTRES, "HFP significance exception")
+DO_ERROR_INFO(hfp_sqrt_exception, SIGFPE, FPE_FLTINV, "HFP square root exception")
+DO_ERROR_INFO(hfp_underflow_exception, SIGFPE, FPE_FLTUND, "HFP underflow exception")
+DO_ERROR_INFO(operand_exception, SIGILL, ILL_ILLOPN, "operand exception")
+DO_ERROR_INFO(overflow_exception, SIGFPE, FPE_INTOVF, "fixpoint overflow exception")
+DO_ERROR_INFO(privileged_op, SIGILL, ILL_PRVOPC, "privileged operation")
+DO_ERROR_INFO(special_op_exception, SIGILL, ILL_ILLOPN, "special operation exception")
+DO_ERROR_INFO(specification_exception, SIGILL, ILL_ILLOPN, "specification exception");
+DO_ERROR_INFO(transaction_exception, SIGILL, ILL_ILLOPN, "transaction constraint exception")
 
 static inline void do_fp_trap(struct pt_regs *regs, __u32 fpc)
 {
 	int si_code = 0;
+
 	/* FPC[2] is Data Exception Code */
 	if ((fpc & 0x00000300) == 0) {
 		/* bits 6 and 7 of DXC are 0 iff IEEE exception */
···
 
 static void illegal_op(struct pt_regs *regs)
 {
-        __u8 opcode[6];
-	__u16 __user *location;
 	int is_uprobe_insn = 0;
+	u16 __user *location;
 	int signal = 0;
+	u16 opcode;
 
 	location = get_trap_ip(regs);
-
 	if (user_mode(regs)) {
-		if (get_user(*((__u16 *) opcode), (__u16 __user *) location))
+		if (get_user(opcode, location))
 			return;
-		if (*((__u16 *) opcode) == S390_BREAKPOINT_U16) {
+		if (opcode == S390_BREAKPOINT_U16) {
 			if (current->ptrace)
 				force_sig_fault(SIGTRAP, TRAP_BRKPT, location);
 			else
 				signal = SIGILL;
 #ifdef CONFIG_UPROBES
-		} else if (*((__u16 *) opcode) == UPROBE_SWBP_INSN) {
+		} else if (opcode == UPROBE_SWBP_INSN) {
 			is_uprobe_insn = 1;
 #endif
-		} else
+		} else {
 			signal = SIGILL;
+		}
 	}
 	/*
-	 * We got either an illegal op in kernel mode, or user space trapped
+	 * This is either an illegal op in kernel mode, or user space trapped
 	 * on a uprobes illegal instruction. See if kprobes or uprobes picks
 	 * it up. If not, SIGILL.
 	 */
 	if (is_uprobe_insn || !user_mode(regs)) {
-		if (notify_die(DIE_BPT, "bpt", regs, 0,
-			       3, SIGTRAP) != NOTIFY_STOP)
+		if (notify_die(DIE_BPT, "bpt", regs, 0, 3, SIGTRAP) != NOTIFY_STOP)
 			signal = SIGILL;
 	}
 	if (signal)
···
 }
 NOKPROBE_SYMBOL(illegal_op);
 
-DO_ERROR_INFO(specification_exception, SIGILL, ILL_ILLOPN,
-	      "specification exception");
-
 static void vector_exception(struct pt_regs *regs)
 {
 	int si_code, vic;
-
-	if (!cpu_has_vx()) {
-		do_trap(regs, SIGILL, ILL_ILLOPN, "illegal operation");
-		return;
-	}
 
 	/* get vector interrupt code from fpc */
 	save_user_fpu_regs();
···
 {
 	if (user_mode(regs))
 		return;
-
 	switch (report_bug(regs->psw.addr - (regs->int_code >> 16), regs)) {
 	case BUG_TRAP_TYPE_NONE:
 		fixup_exception(regs);
···
 	}
 }
 
-void kernel_stack_overflow(struct pt_regs *regs)
+void kernel_stack_invalid(struct pt_regs *regs)
 {
 	/*
 	 * Normally regs are unpoisoned by the generic entry code, but
···
 	 */
 	kmsan_unpoison_entry_regs(regs);
 	bust_spinlocks(1);
-	printk("Kernel stack overflow.\n");
+	pr_emerg("Kernel stack pointer invalid\n");
 	show_regs(regs);
 	bust_spinlocks(0);
-	panic("Corrupt kernel stack, can't continue.");
+	panic("Invalid kernel stack pointer, cannot continue");
 }
-NOKPROBE_SYMBOL(kernel_stack_overflow);
+NOKPROBE_SYMBOL(kernel_stack_invalid);
 
 static void __init test_monitor_call(void)
 {
···
 
 	if (!IS_ENABLED(CONFIG_BUG))
 		return;
-	asm volatile(
+	asm_inline volatile(
 		"	mc	0,0\n"
 		"0:	lhi	%[val],0\n"
 		"1:\n"
···
 	teid.val = lc->trans_exc_code;
 	regs->int_code = lc->pgm_int_code;
 	regs->int_parm_long = teid.val;
-
 	/*
 	 * In case of a guest fault, short-circuit the fault handler and return.
 	 * This way the sie64a() function will return 0; fault address and
···
 		current->thread.gmap_int_code = regs->int_code & 0xffff;
 		return;
 	}
-
 	state = irqentry_enter(regs);
-
 	if (user_mode(regs)) {
 		update_timer_sys();
-		if (!static_branch_likely(&cpu_has_bear)) {
+		if (!cpu_has_bear()) {
 			if (regs->last_break < 4096)
 				regs->last_break = 1;
 		}
 		current->thread.last_break = regs->last_break;
 	}
-
 	if (lc->pgm_code & 0x0200) {
 		/* transaction abort */
 		current->thread.trap_tdb = lc->pgm_tdb;
 	}
-
 	if (lc->pgm_code & PGM_INT_CODE_PER) {
 		if (user_mode(regs)) {
 			struct per_event *ev = &current->thread.per_event;
···
 			goto out;
 		}
 	}
-
 	if (!irqs_disabled_flags(regs->psw.mask))
 		trace_hardirqs_on();
 	__arch_local_irq_ssm(regs->psw.mask & ~PSW_MASK_PER);
-
 	trapnr = regs->int_code & PGM_INT_CODE_MASK;
 	if (trapnr)
 		pgm_check_table[trapnr](regs);

arch/s390/kvm/interrupt.c

···
 #define KMSG_COMPONENT "kvm-s390"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/cpufeature.h>
 #include <linux/interrupt.h>
 #include <linux/kvm_host.h>
 #include <linux/hrtimer.h>
···
 	/* take care of lazy register loading */
 	kvm_s390_fpu_store(vcpu->run);
 	save_access_regs(vcpu->run->s.regs.acrs);
-	if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
+	if (cpu_has_gs() && vcpu->arch.gs_enabled)
 		save_gs_cb(current->thread.gs_cb);
 
 	/* Extended save area */
···
 	rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC);
 	rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
 				 (u64 *) __LC_PGM_LAST_BREAK);
-	rc |= put_guest_lc(vcpu, pgm_info.code,
-			   (u16 *)__LC_PGM_INT_CODE);
+	rc |= put_guest_lc(vcpu, pgm_info.code, (u16 *)__LC_PGM_CODE);
 	rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
 			     &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
 	rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,

arch/s390/kvm/kvm-s390.c

···
 #include <linux/mman.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
+#include <linux/cpufeature.h>
 #include <linux/random.h>
 #include <linux/slab.h>
 #include <linux/timer.h>
···
 #include <asm/access-regs.h>
 #include <asm/asm-offsets.h>
 #include <asm/lowcore.h>
+#include <asm/machine.h>
 #include <asm/stp.h>
 #include <asm/gmap.h>
 #include <asm/nmi.h>
···
 	if (test_facility(201))	/* PFCR */
 		pfcr_query(&kvm_s390_available_subfunc.pfcr);
 
-	if (MACHINE_HAS_ESOP)
+	if (machine_has_esop())
 		allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
 	/*
 	 * We need SIE support, ESOP (PROT_READ protection for gmap_shadow),
 	 * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing).
 	 */
-	if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao ||
+	if (!sclp.has_sief2 || !machine_has_esop() || !sclp.has_64bscao ||
 	    !test_facility(3) || !nested)
 		return;
 	allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2);
···
 			r = min_t(unsigned int, num_online_cpus(), r);
 		break;
 	case KVM_CAP_S390_COW:
-		r = MACHINE_HAS_ESOP;
+		r = machine_has_esop();
 		break;
 	case KVM_CAP_S390_VECTOR_REGISTERS:
 		r = test_facility(129);
···
 	/* we emulate STHYI in kvm */
 	set_kvm_facility(kvm->arch.model.fac_mask, 74);
 	set_kvm_facility(kvm->arch.model.fac_list, 74);
-	if (MACHINE_HAS_TLB_GUEST) {
+	if (machine_has_tlb_guest()) {
 		set_kvm_facility(kvm->arch.model.fac_mask, 147);
 		set_kvm_facility(kvm->arch.model.fac_list, 147);
 	}
···
 
 	kvm_s390_vcpu_setup_model(vcpu);
 
-	/* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
-	if (MACHINE_HAS_ESOP)
+	/* pgste_set_pte has special handling for !machine_has_esop() */
+	if (machine_has_esop())
 		vcpu->arch.sie_block->ecb |= ECB_HOSTPROTINT;
 	if (test_kvm_facility(vcpu->kvm, 9))
 		vcpu->arch.sie_block->ecb |= ECB_SRSI;
···
 		vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
 		vcpu->arch.sie_block->fpf |= kvm_run->s.regs.bpbc ? FPF_BPBC : 0;
 	}
-	if (MACHINE_HAS_GS) {
+	if (cpu_has_gs()) {
 		preempt_disable();
 		local_ctl_set_bit(2, CR2_GUARDED_STORAGE_BIT);
 		if (current->thread.gs_cb) {
···
 	kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea;
 	kvm_run->s.regs.bpbc = (vcpu->arch.sie_block->fpf & FPF_BPBC) == FPF_BPBC;
 	kvm_run->s.regs.diag318 = vcpu->arch.diag318_info.val;
-	if (MACHINE_HAS_GS) {
+	if (cpu_has_gs()) {
 		preempt_disable();
 		local_ctl_set_bit(2, CR2_GUARDED_STORAGE_BIT);
 		if (vcpu->arch.gs_enabled)

arch/s390/lib/spinlock.c

···
 #include <linux/export.h>
 #include <linux/spinlock.h>
 #include <linux/jiffies.h>
+#include <linux/sysctl.h>
 #include <linux/init.h>
 #include <linux/smp.h>
 #include <linux/percpu.h>
 #include <linux/io.h>
 #include <asm/alternative.h>
+#include <asm/machine.h>
 #include <asm/asm.h>
 
 int spin_retry = -1;
···
 	return 1;
 }
 __setup("spin_retry=", spin_retry_setup);
+
+static const struct ctl_table s390_spin_sysctl_table[] = {
+	{
+		.procname	= "spin_retry",
+		.data		= &spin_retry,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+};
+
+static int __init init_s390_spin_sysctls(void)
+{
+	register_sysctl_init("kernel", s390_spin_sysctl_table);
+	return 0;
+}
+arch_initcall(init_s390_spin_sysctls);
 
 struct spin_wait {
 	struct spin_wait *next, *prev;
···
 
 	ix = get_lowcore()->spinlock_index++;
 	barrier();
-	lockval = SPINLOCK_LOCKVAL;	/* cpu + 1 */
+	lockval = spinlock_lockval();	/* cpu + 1 */
 	node = this_cpu_ptr(&spin_wait[ix]);
 	node->prev = node->next = NULL;
 	node_id = node->node_id;
···
 		if (count-- >= 0)
 			continue;
 		count = spin_retry;
-		if (!MACHINE_IS_LPAR || arch_vcpu_is_preempted(owner - 1))
+		if (!machine_is_lpar() || arch_vcpu_is_preempted(owner - 1))
 			smp_yield_cpu(owner - 1);
 	}
 
···
 {
 	int lockval, old, new, owner, count;
 
-	lockval = SPINLOCK_LOCKVAL;	/* cpu + 1 */
+	lockval = spinlock_lockval();	/* cpu + 1 */
 
 	/* Pass the virtual CPU to the lock holder if it is not running */
 	owner = arch_spin_yield_target(READ_ONCE(lp->lock), NULL);
···
 		if (count-- >= 0)
 			continue;
 		count = spin_retry;
-		if (!MACHINE_IS_LPAR || arch_vcpu_is_preempted(owner - 1))
+		if (!machine_is_lpar() || arch_vcpu_is_preempted(owner - 1))
 			smp_yield_cpu(owner - 1);
 	}
 }
···
 
 int arch_spin_trylock_retry(arch_spinlock_t *lp)
 {
-	int cpu = SPINLOCK_LOCKVAL;
+	int cpu = spinlock_lockval();
 	int owner, count;
 
 	for (count = spin_retry; count > 0; count--) {
···
 	cpu = READ_ONCE(lp->lock) & _Q_LOCK_CPU_MASK;
 	if (!cpu)
 		return;
-	if (MACHINE_IS_LPAR && !arch_vcpu_is_preempted(cpu - 1))
+	if (machine_is_lpar() && !arch_vcpu_is_preempted(cpu - 1))
 		return;
 	smp_yield_cpu(cpu - 1);
 }

arch/s390/lib/uaccess.c

···
 }
 #endif /*CONFIG_DEBUG_ENTRY */
 
+union oac {
+	unsigned int val;
+	struct {
+		struct {
+			unsigned short key : 4;
+			unsigned short	   : 4;
+			unsigned short as  : 2;
+			unsigned short	   : 4;
+			unsigned short k   : 1;
+			unsigned short a   : 1;
+		} oac1;
+		struct {
+			unsigned short key : 4;
+			unsigned short	   : 4;
+			unsigned short as  : 2;
+			unsigned short	   : 4;
+			unsigned short k   : 1;
+			unsigned short a   : 1;
+		} oac2;
+	};
+};
+
+static uaccess_kmsan_or_inline __must_check unsigned long
+raw_copy_from_user_key(void *to, const void __user *from, unsigned long size, unsigned long key)
+{
+	unsigned long osize;
+	union oac spec = {
+		.oac2.key = key,
+		.oac2.as = PSW_BITS_AS_SECONDARY,
+		.oac2.k = 1,
+		.oac2.a = 1,
+	};
+	int cc;
+
+	while (1) {
+		osize = size;
+		asm_inline volatile(
+			"	lr	%%r0,%[spec]\n"
+			"0:	mvcos	%[to],%[from],%[size]\n"
+			"1:	nopr	%%r7\n"
+			CC_IPM(cc)
+			EX_TABLE_UA_MVCOS_FROM(0b, 0b)
+			EX_TABLE_UA_MVCOS_FROM(1b, 0b)
+			: CC_OUT(cc, cc), [size] "+d" (size), [to] "=Q" (*(char *)to)
+			: [spec] "d" (spec.val), [from] "Q" (*(const char __user *)from)
+			: CC_CLOBBER_LIST("memory", "0"));
+		if (CC_TRANSFORM(cc) == 0)
+			return osize - size;
+		size -= 4096;
+		to += 4096;
+		from += 4096;
+	}
+}
+
 unsigned long _copy_from_user_key(void *to, const void __user *from,
 				  unsigned long n, unsigned long key)
 {
···
 }
 EXPORT_SYMBOL(_copy_from_user_key);
 
+static uaccess_kmsan_or_inline __must_check unsigned long
+raw_copy_to_user_key(void __user *to, const void *from, unsigned long size, unsigned long key)
+{
+	unsigned long osize;
+	union oac spec = {
+		.oac1.key = key,
+		.oac1.as = PSW_BITS_AS_SECONDARY,
+		.oac1.k = 1,
+		.oac1.a = 1,
+	};
+	int cc;
+
+	while (1) {
+		osize = size;
+		asm_inline volatile(
+			"	lr	%%r0,%[spec]\n"
+			"0:	mvcos	%[to],%[from],%[size]\n"
+			"1:	nopr	%%r7\n"
+			CC_IPM(cc)
+			EX_TABLE_UA_MVCOS_TO(0b, 0b)
+			EX_TABLE_UA_MVCOS_TO(1b, 0b)
+			: CC_OUT(cc, cc), [size] "+d" (size), [to] "=Q" (*(char __user *)to)
+			: [spec] "d" (spec.val), [from] "Q" (*(const char *)from)
+			: CC_CLOBBER_LIST("memory", "0"));
+		if (CC_TRANSFORM(cc) == 0)
+			return osize - size;
+		size -= 4096;
+		to += 4096;
+		from += 4096;
+	}
+}
+
 unsigned long _copy_to_user_key(void __user *to, const void *from,
 				unsigned long n, unsigned long key)
 {
···
 	return raw_copy_to_user_key(to, from, n, key);
 }
 EXPORT_SYMBOL(_copy_to_user_key);
-
-unsigned long __clear_user(void __user *to, unsigned long size)
-{
-	unsigned long rem;
-	union oac spec = {
-		.oac1.as = PSW_BITS_AS_SECONDARY,
-		.oac1.a = 1,
-	};
-
-	asm volatile(
-		"	lr	0,%[spec]\n"
-		"0:	mvcos	0(%[to]),0(%[zeropg]),%[size]\n"
-		"1:	jz	5f\n"
-		"	algr	%[size],%[val]\n"
-		"	slgr	%[to],%[val]\n"
-		"	j	0b\n"
-		"2:	la	%[rem],4095(%[to])\n"	/* rem = to + 4095 */
-		"	nr	%[rem],%[val]\n"	/* rem = (to + 4095) & -4096 */
-		"	slgr	%[rem],%[to]\n"
-		"	clgr	%[size],%[rem]\n"	/* copy crosses next page boundary? */
-		"	jnh	6f\n"
-		"3:	mvcos	0(%[to]),0(%[zeropg]),%[rem]\n"
-		"4:	slgr	%[size],%[rem]\n"
-		"	j	6f\n"
-		"5:	slgr	%[size],%[size]\n"
-		"6:\n"
-		EX_TABLE(0b, 2b)
-		EX_TABLE(1b, 2b)
-		EX_TABLE(3b, 6b)
-		EX_TABLE(4b, 6b)
-		: [size] "+&a" (size), [to] "+&a" (to), [rem] "=&a" (rem)
-		: [val] "a" (-4096UL), [zeropg] "a" (empty_zero_page), [spec] "d" (spec.val)
-		: "cc", "memory", "0");
-	return size;
-}
-EXPORT_SYMBOL(__clear_user);

arch/s390/mm/dump_pagetables.c

···
 // SPDX-License-Identifier: GPL-2.0
+
+#include <linux/cpufeature.h>
 #include <linux/set_memory.h>
 #include <linux/ptdump.h>
 #include <linux/seq_file.h>
···
 	 * in which case we have two lpswe instructions in lowcore that need
 	 * to be executable.
 	 */
-	if (addr == PAGE_SIZE && (nospec_uses_trampoline() || !static_key_enabled(&cpu_has_bear)))
+	if (addr == PAGE_SIZE && (nospec_uses_trampoline() || !cpu_has_bear()))
 		return;
 	WARN_ONCE(IS_ENABLED(CONFIG_DEBUG_WX),
 		  "s390/mm: Found insecure W+X mapping at address %pS\n",
···
 		},
 	};
 
-	if (!MACHINE_HAS_NX)
+	if (!cpu_has_nx())
 		return true;
 	ptdump_walk_pgd(&st.ptdump, &init_mm, NULL);
 	if (st.wx_pages) {
···
 		return false;
 	} else {
 		pr_info("Checked W+X mappings: passed, no %sW+X pages found\n",
-			(nospec_uses_trampoline() || !static_key_enabled(&cpu_has_bear)) ?
+			(nospec_uses_trampoline() || !cpu_has_bear()) ?
 			"unexpected " : "");
 
 		return true;

arch/s390/mm/extable.c

···
 	return true;
 }
 
+struct insn_ssf {
+	u64	opc1 : 8;
+	u64	r3   : 4;
+	u64	opc2 : 4;
+	u64	b1   : 4;
+	u64	d1   : 12;
+	u64	b2   : 4;
+	u64	d2   : 12;
+} __packed;
+
+static bool ex_handler_ua_mvcos(const struct exception_table_entry *ex,
+				bool from, struct pt_regs *regs)
+{
+	unsigned long uaddr, remainder;
+	struct insn_ssf *insn;
+
+	/*
+	 * If the faulting user space access crossed a page boundary retry by
+	 * limiting the access to the first page (adjust length accordingly).
+	 * Then the mvcos instruction will either complete with condition code
+	 * zero, or generate another fault where the user space access did not
+	 * cross a page boundary.
+	 * If the faulting user space access did not cross a page boundary set
+	 * length to zero and retry. In this case no user space access will
+	 * happen, and the mvcos instruction will complete with condition code
+	 * zero.
+	 * In both cases the instruction will complete with condition code
+	 * zero (copying finished), and the register which contains the
+	 * length, indicates the number of bytes copied.
+	 */
+	regs->psw.addr = extable_fixup(ex);
+	insn = (struct insn_ssf *)regs->psw.addr;
+	if (from)
+		uaddr = regs->gprs[insn->b2] + insn->d2;
+	else
+		uaddr = regs->gprs[insn->b1] + insn->d1;
+	remainder = PAGE_SIZE - (uaddr & (PAGE_SIZE - 1));
+	if (regs->gprs[insn->r3] <= remainder)
+		remainder = 0;
+	regs->gprs[insn->r3] = remainder;
+	return true;
+}
+
 bool fixup_exception(struct pt_regs *regs)
 {
 	const struct exception_table_entry *ex;
···
 		return ex_handler_zeropad(ex, regs);
 	case EX_TYPE_FPC:
 		return ex_handler_fpc(ex, regs);
+	case EX_TYPE_UA_MVCOS_TO:
+		return ex_handler_ua_mvcos(ex, false, regs);
+	case EX_TYPE_UA_MVCOS_FROM:
+		return ex_handler_ua_mvcos(ex, true, regs);
 	}
 	panic("invalid exception table entry");
 }

arch/s390/mm/extmem.c

···
 #include <linux/ioport.h>
 #include <linux/refcount.h>
 #include <linux/pgtable.h>
+#include <asm/machine.h>
 #include <asm/diag.h>
 #include <asm/page.h>
 #include <asm/ebcdic.h>
···
 	int rc;
 	struct dcss_segment seg;
 
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return -ENOSYS;
 
 	dcss_mkname(name, seg.dcss_name);
···
 	struct dcss_segment *seg;
 	int rc;
 
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return -ENOSYS;
 
 	mutex_lock(&dcss_lock);
···
 	unsigned long dummy;
 	struct dcss_segment *seg;
 
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return;
 
 	mutex_lock(&dcss_lock);
···
 	char cmd2[80];
 	int i, response;
 
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return;
 
 	mutex_lock(&dcss_lock);

arch/s390/mm/fault.c

···
 
 #include <linux/kernel_stat.h>
 #include <linux/mmu_context.h>
+#include <linux/cpufeature.h>
 #include <linux/perf_event.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
-#include <linux/jump_label.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/string.h>
···
 #include <asm/uv.h>
 #include "../kernel/entry.h"
 
-static DEFINE_STATIC_KEY_FALSE(have_store_indication);
-
-static int __init fault_init(void)
-{
-	if (test_facility(75))
-		static_branch_enable(&have_store_indication);
-	return 0;
-}
-early_initcall(fault_init);
-
 /*
  * Find out which address space caused the exception.
  */
···
 {
 	union teid teid = { .val = regs->int_parm_long };
 
-	if (static_branch_likely(&have_store_indication))
+	if (test_facility(75))
 		return teid.fsi == TEID_FSI_STORE;
 	return false;
 }
···
 }
 
 int show_unhandled_signals = 1;
+
+static const struct ctl_table s390_fault_sysctl_table[] = {
+	{
+		.procname	= "userprocess_debug",
+		.data		= &show_unhandled_signals,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+};
+
+static int __init init_s390_fault_sysctls(void)
+{
+	register_sysctl_init("kernel", s390_fault_sysctl_table);
+	return 0;
+}
+arch_initcall(init_s390_fault_sysctls);
 
 void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault)
 {
···
 		 */
 		return handle_fault_error_nolock(regs, 0);
 	}
-	if (unlikely(MACHINE_HAS_NX && teid.b56)) {
+	if (unlikely(cpu_has_nx() && teid.b56)) {
 		regs->int_parm_long = (teid.addr * PAGE_SIZE) | (regs->psw.addr & PAGE_MASK);
 		return handle_fault_error_nolock(regs, SEGV_ACCERR);
 	}

arch/s390/mm/gmap.c

···
  *		 Janosch Frank <[e-mail]>
  */
 
+#include <linux/cpufeature.h>
 #include <linux/kernel.h>
 #include <linux/pagewalk.h>
 #include <linux/swap.h>
···
 #include <linux/pgtable.h>
 #include <asm/page-states.h>
 #include <asm/pgalloc.h>
+#include <asm/machine.h>
 #include <asm/gmap.h>
 #include <asm/page.h>
 #include <asm/tlb.h>
···
 
 static void gmap_flush_tlb(struct gmap *gmap)
 {
-	if (MACHINE_HAS_IDTE)
+	if (cpu_has_idte())
 		__tlb_flush_idte(gmap->asce);
 	else
 		__tlb_flush_global();
···
 	gaddr &= HPAGE_MASK;
 	pmdp_notify_gmap(gmap, pmdp, gaddr);
 	new = clear_pmd_bit(new, __pgprot(_SEGMENT_ENTRY_GMAP_IN));
-	if (MACHINE_HAS_TLB_GUEST)
+	if (machine_has_tlb_guest())
 		__pmdp_idte(gaddr, (pmd_t *)pmdp, IDTE_GUEST_ASCE, gmap->asce,
 			    IDTE_GLOBAL);
-	else if (MACHINE_HAS_IDTE)
+	else if (cpu_has_idte())
 		__pmdp_idte(gaddr, (pmd_t *)pmdp, 0, 0, IDTE_GLOBAL);
 	else
 		__pmdp_csp(pmdp);
···
 			WARN_ON(pmd_val(*pmdp) & ~(_SEGMENT_ENTRY_HARDWARE_BITS_LARGE |
 						   _SEGMENT_ENTRY_GMAP_UC |
 						   _SEGMENT_ENTRY));
-			if (MACHINE_HAS_TLB_GUEST)
+			if (machine_has_tlb_guest())
 				__pmdp_idte(gaddr, pmdp, IDTE_GUEST_ASCE,
 					    gmap->asce, IDTE_LOCAL);
-			else if (MACHINE_HAS_IDTE)
+			else if (cpu_has_idte())
 				__pmdp_idte(gaddr, pmdp, 0, 0, IDTE_LOCAL);
 			*pmdp = __pmd(_SEGMENT_ENTRY_EMPTY);
 		}
···
 			WARN_ON(pmd_val(*pmdp) & ~(_SEGMENT_ENTRY_HARDWARE_BITS_LARGE |
 						   _SEGMENT_ENTRY_GMAP_UC |
 						   _SEGMENT_ENTRY));
-			if (MACHINE_HAS_TLB_GUEST)
+			if (machine_has_tlb_guest())
 				__pmdp_idte(gaddr, pmdp, IDTE_GUEST_ASCE,
 					    gmap->asce, IDTE_GLOBAL);
-			else if (MACHINE_HAS_IDTE)
+			else if (cpu_has_idte())
 				__pmdp_idte(gaddr, pmdp, 0, 0, IDTE_GLOBAL);
 			else
 				__pmdp_csp(pmdp);
···
 	/* Do we have pgstes? if yes, we are done */
 	if (mm_has_pgste(mm))
 		return 0;
-	/* Fail if the page tables are 2K */
-	if (!mm_alloc_pgste(mm))
-		return -EINVAL;
 	mmap_write_lock(mm);
 	mm->context.has_pgste = 1;
 	/* split thp mappings and disable thp for future mappings */

arch/s390/mm/hugetlbpage.c

···
 #define KMSG_COMPONENT "hugetlb"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
-#include <asm/pgalloc.h>
+#include <linux/cpufeature.h>
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
 #include <linux/mman.h>
 #include <linux/sched/mm.h>
 #include <linux/security.h>
+#include <asm/pgalloc.h>
 
 /*
  * If the bit selected by single-bit bitmask "a" is set within "x", move
···
 
 bool __init arch_hugetlb_valid_size(unsigned long size)
 {
-	if (MACHINE_HAS_EDAT1 && size == PMD_SIZE)
+	if (cpu_has_edat1() && size == PMD_SIZE)
 		return true;
-	else if (MACHINE_HAS_EDAT2 && size == PUD_SIZE)
+	else if (cpu_has_edat2() && size == PUD_SIZE)
 		return true;
 	else
 		return false;

arch/s390/mm/init.c

···
  *    Copyright (C) 1995  Linus Torvalds
  */
 
+#include <linux/cpufeature.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
···
 {
 	unsigned long size = __end_ro_after_init - __start_ro_after_init;
 
-	if (MACHINE_HAS_NX)
+	if (cpu_has_nx())
 		system_ctl_set_bit(0, CR0_INSTRUCTION_EXEC_PROTECTION_BIT);
 	__set_memory_ro(__start_ro_after_init, __end_ro_after_init);
 	pr_info("Write protected read-only-after-init data: %luk\n", size >> 10);
···
         high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
 
 	pv_init();
-	kfence_split_mapping();
 
 	/* this will put all low memory onto the freelists */
 	memblock_free_all();
···
 	unsigned long size_pages = PFN_DOWN(size);
 	int rc;
 
-	if (WARN_ON_ONCE(params->pgprot.pgprot != PAGE_KERNEL.pgprot))
+	if (WARN_ON_ONCE(pgprot_val(params->pgprot) != pgprot_val(PAGE_KERNEL)))
 		return -EINVAL;
 
 	VM_BUG_ON(!mhp_range_allowed(start, size, true));

arch/s390/mm/mmap.c

···
 {
 	unsigned long gap = rlim_stack->rlim_cur;
 	unsigned long pad = stack_maxrandom_size() + stack_guard_gap;
-	unsigned long gap_min, gap_max;
 
 	/* Values close to RLIM_INFINITY can overflow. */
 	if (gap + pad > gap)
···
 	 * Top of mmap area (just below the process stack).
 	 * Leave at least a ~128 MB hole.
 	 */
-	gap_min = SZ_128M;
-	gap_max = (STACK_TOP / 6) * 5;
-
-	if (gap < gap_min)
-		gap = gap_min;
-	else if (gap > gap_max)
-		gap = gap_max;
+	gap = clamp(gap, SZ_128M, (STACK_TOP / 6) * 5);
 
 	return PAGE_ALIGN(STACK_TOP - gap - rnd);
 }

arch/s390/mm/pageattr.c

···
  * Copyright IBM Corp. 2011
  * Author(s): Jan Glauber <[e-mail]>
  */
+#include <linux/cpufeature.h>
 #include <linux/hugetlb.h>
 #include <linux/proc_fs.h>
 #include <linux/vmalloc.h>
···
 	unsigned long boundary, size;
 
 	while (start < end) {
-		if (MACHINE_HAS_EDAT1) {
+		if (cpu_has_edat1()) {
 			/* set storage keys for a 1MB frame */
 			size = 1UL << 20;
 			boundary = (start + size) & ~(size - 1);
···
 	unsigned long *table, mask;
 
 	mask = 0;
-	if (MACHINE_HAS_EDAT2) {
+	if (cpu_has_edat2()) {
 		switch (dtt) {
 		case CRDTE_DTT_REGION3:
 			mask = ~(PTRS_PER_PUD * sizeof(pud_t) - 1);
···
 		}
 		table = (unsigned long *)((unsigned long)old & mask);
 		crdte(*old, new, table, dtt, addr, get_lowcore()->kernel_asce.val);
-	} else if (MACHINE_HAS_IDTE) {
+	} else if (cpu_has_idte()) {
 		cspg(old, *old, new);
 	} else {
 		csp((unsigned int *)old + 1, *old, new);
···
 	unsigned long end;
 	int rc;
 
-	if (!MACHINE_HAS_NX)
+	if (!cpu_has_nx())
 		flags &= ~(SET_MEMORY_NX | SET_MEMORY_X);
 	if (!flags)
 		return 0;

arch/s390/mm/pfault.c

···
 	if (pfault_disable)
 		return rc;
 	diag_stat_inc(DIAG_STAT_X258);
-	asm volatile(
+	asm_inline volatile(
 		"	diag	%[refbk],%[rc],0x258\n"
 		"0:	nopr	%%r7\n"
 		EX_TABLE(0b, 0b)
···
 	if (pfault_disable)
 		return;
 	diag_stat_inc(DIAG_STAT_X258);
-	asm volatile(
+	asm_inline volatile(
 		"	diag	%[refbk],0,0x258\n"
 		"0:	nopr	%%r7\n"
 		EX_TABLE(0b, 0b)

arch/s390/mm/pgalloc.c

···
 #include <asm/tlb.h>
 #include <asm/tlbflush.h>
 
-#ifdef CONFIG_PGSTE
-
-int page_table_allocate_pgste = 0;
-EXPORT_SYMBOL(page_table_allocate_pgste);
-
-static const struct ctl_table page_table_sysctl[] = {
-	{
-		.procname	= "allocate_pgste",
-		.data		= &page_table_allocate_pgste,
-		.maxlen		= sizeof(int),
-		.mode		= S_IRUGO | S_IWUSR,
-		.proc_handler	= proc_dointvec_minmax,
-		.extra1		= SYSCTL_ZERO,
-		.extra2		= SYSCTL_ONE,
-	},
-};
-
-static int __init page_table_register_sysctl(void)
-{
-	return register_sysctl("vm", page_table_sysctl) ? 0 : -ENOMEM;
-}
-__initcall(page_table_register_sysctl);
-
-#endif /* CONFIG_PGSTE */
-
 unsigned long *crst_table_alloc(struct mm_struct *mm)
 {
 	struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL, CRST_ALLOC_ORDER);

arch/s390/mm/pgtable.c

···
  *    Author(s): Martin Schwidefsky <[e-mail]>
  */
 
+#include <linux/cpufeature.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
···
 #include <asm/tlbflush.h>
 #include <asm/mmu_context.h>
 #include <asm/page-states.h>
+#include <asm/machine.h>
 
 pgprot_t pgprot_writecombine(pgprot_t prot)
 {
···
 }
 EXPORT_SYMBOL_GPL(pgprot_writecombine);
 
-pgprot_t pgprot_writethrough(pgprot_t prot)
-{
-	/*
-	 * mio_wb_bit_mask may be set on a different CPU, but it is only set
-	 * once at init and only read afterwards.
-	 */
-	return __pgprot(pgprot_val(prot) & ~mio_wb_bit_mask);
-}
-EXPORT_SYMBOL_GPL(pgprot_writethrough);
-
 static inline void ptep_ipte_local(struct mm_struct *mm, unsigned long addr,
 				   pte_t *ptep, int nodat)
 {
 	unsigned long opt, asce;
 
-	if (MACHINE_HAS_TLB_GUEST) {
+	if (machine_has_tlb_guest()) {
 		opt = 0;
 		asce = READ_ONCE(mm->context.gmap_asce);
 		if (asce == 0UL || nodat)
···
 {
 	unsigned long opt, asce;
 
-	if (MACHINE_HAS_TLB_GUEST) {
+	if (machine_has_tlb_guest()) {
 		opt = 0;
 		asce = READ_ONCE(mm->context.gmap_asce);
 		if (asce == 0UL || nodat)
···
 	if (unlikely(pte_val(old) & _PAGE_INVALID))
 		return old;
 	atomic_inc(&mm->context.flush_count);
-	if (MACHINE_HAS_TLB_LC &&
+	if (cpu_has_tlb_lc() &&
 	    cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id())))
 		ptep_ipte_local(mm, addr, ptep, nodat);
 	else
···
 	skey = (unsigned long) page_get_storage_key(address);
 	bits = skey & (_PAGE_CHANGED | _PAGE_REFERENCED);
 	/* Transfer page changed & referenced bit to guest bits in pgste */
-	pgste_val(pgste) |= bits << 48;		/* GR bit & GC bit */
+	pgste = set_pgste_bit(pgste, bits << 48); /* GR bit & GC bit */
 	/* Copy page access key and fetch protection bit to pgste */
-	pgste_val(pgste) &= ~(PGSTE_ACC_BITS | PGSTE_FP_BIT);
-	pgste_val(pgste) |= (skey & (_PAGE_ACC_BITS | _PAGE_FP_BIT)) << 56;
+	pgste = clear_pgste_bit(pgste, PGSTE_ACC_BITS | PGSTE_FP_BIT);
+	pgste = set_pgste_bit(pgste, (skey & (_PAGE_ACC_BITS | _PAGE_FP_BIT)) << 56);
 #endif
 	return pgste;
 
···
 	if ((pte_val(entry) & _PAGE_PRESENT) &&
 	    (pte_val(entry) & _PAGE_WRITE) &&
 	    !(pte_val(entry) & _PAGE_INVALID)) {
-		if (!MACHINE_HAS_ESOP) {
+		if (!machine_has_esop()) {
 			/*
 			 * Without enhanced suppression-on-protection force
 			 * the dirty bit on for all writable ptes.
···
 		}
 		if (!(pte_val(entry) & _PAGE_PROTECT))
 			/* This pte allows write access, set user-dirty */
-			pgste_val(pgste) |= PGSTE_UC_BIT;
+			pgste = set_pgste_bit(pgste, PGSTE_UC_BIT);
 	}
 #endif
 	set_pte(ptep, entry);
···
 
 	bits = pgste_val(pgste) & (PGSTE_IN_BIT | PGSTE_VSIE_BIT);
 	if (bits) {
-		pgste_val(pgste) ^= bits;
+		pgste = __pgste(pgste_val(pgste) ^ bits);
 		ptep_notify(mm, addr, ptep, bits);
 	}
 #endif
···
 static inline void pmdp_idte_local(struct mm_struct *mm,
 				   unsigned long addr, pmd_t *pmdp)
 {
-	if (MACHINE_HAS_TLB_GUEST)
+	if (machine_has_tlb_guest())
 		__pmdp_idte(addr, pmdp, IDTE_NODAT | IDTE_GUEST_ASCE,
 			    mm->context.asce, IDTE_LOCAL);
 	else
···
 static inline void pmdp_idte_global(struct mm_struct *mm,
 				    unsigned long addr, pmd_t *pmdp)
 {
-	if (MACHINE_HAS_TLB_GUEST) {
+	if (machine_has_tlb_guest()) {
 		__pmdp_idte(addr, pmdp, IDTE_NODAT | IDTE_GUEST_ASCE,
 			    mm->context.asce, IDTE_GLOBAL);
 		if (mm_has_pgste(mm) && mm->context.allow_gmap_hpage_1m)
 			gmap_pmdp_idte_global(mm, addr);
-	} else if (MACHINE_HAS_IDTE) {
+	} else if (cpu_has_idte()) {
 		__pmdp_idte(addr, pmdp, 0, 0, IDTE_GLOBAL);
 		if (mm_has_pgste(mm) && mm->context.allow_gmap_hpage_1m)
 			gmap_pmdp_idte_global(mm, addr);
···
 	if (pmd_val(old) & _SEGMENT_ENTRY_INVALID)
 		return old;
 	atomic_inc(&mm->context.flush_count);
-	if (MACHINE_HAS_TLB_LC &&
+	if (cpu_has_tlb_lc() &&
 	    cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id())))
 		pmdp_idte_local(mm, addr, pmdp);
 	else
···
 static inline void pudp_idte_local(struct mm_struct *mm,
 				   unsigned long addr, pud_t *pudp)
 {
-	if (MACHINE_HAS_TLB_GUEST)
+	if (machine_has_tlb_guest())
 		__pudp_idte(addr, pudp, IDTE_NODAT | IDTE_GUEST_ASCE,
 			    mm->context.asce, IDTE_LOCAL);
 	else
···
 static inline void pudp_idte_global(struct mm_struct *mm,
 				    unsigned long addr, pud_t *pudp)
 {
-	if (MACHINE_HAS_TLB_GUEST)
+	if (machine_has_tlb_guest())
 		__pudp_idte(addr, pudp, IDTE_NODAT | IDTE_GUEST_ASCE,
 			    mm->context.asce, IDTE_GLOBAL);
-	else if (MACHINE_HAS_IDTE)
+	else if (cpu_has_idte())
 		__pudp_idte(addr, pudp, 0, 0, IDTE_GLOBAL);
 	else
 		/*
···
 	if (pud_val(old) & _REGION_ENTRY_INVALID)
 		return old;
 	atomic_inc(&mm->context.flush_count);
-	if (MACHINE_HAS_TLB_LC &&
+	if (cpu_has_tlb_lc() &&
 	    cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id())))
 		pudp_idte_local(mm, addr, pudp);
 	else
···
 	/* the mm_has_pgste() check is done in set_pte_at() */
 	preempt_disable();
 	pgste = pgste_get_lock(ptep);
-	pgste_val(pgste) &= ~_PGSTE_GPS_ZERO;
+	pgste = clear_pgste_bit(pgste, _PGSTE_GPS_ZERO);
 	pgste_set_key(ptep, pgste, entry, mm);
 	pgste = pgste_set_pte(ptep, pgste, entry);
 	pgste_set_unlock(ptep, pgste);
···
 
 	preempt_disable();
 	pgste = pgste_get_lock(ptep);
-	pgste_val(pgste) |= PGSTE_IN_BIT;
+	pgste = set_pgste_bit(pgste, PGSTE_IN_BIT);
 	pgste_set_unlock(ptep, pgste);
 	preempt_enable();
 }
···
 		entry = clear_pte_bit(entry, __pgprot(_PAGE_INVALID));
 		entry = set_pte_bit(entry, __pgprot(_PAGE_PROTECT));
 	}
-	pgste_val(pgste) |= bit;
+	pgste = set_pgste_bit(pgste, bit);
 	pgste = pgste_set_pte(ptep, pgste, entry);
 	pgste_set_unlock(ptep, pgste);
 	return 0;
···
 	if (!(pte_val(spte) & _PAGE_INVALID) &&
 	    !((pte_val(spte) & _PAGE_PROTECT) &&
 	      !(pte_val(pte) & _PAGE_PROTECT))) {
-		pgste_val(spgste) |= PGSTE_VSIE_BIT;
+		spgste = set_pgste_bit(spgste, PGSTE_VSIE_BIT);
 		tpgste = pgste_get_lock(tptep);
 		tpte = __pte((pte_val(spte) & PAGE_MASK) |
 			     (pte_val(pte) & _PAGE_PROTECT));
···
 		pte_clear(mm, addr, ptep);
 	}
 	if (reset)
-		pgste_val(pgste) &= ~(_PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT);
+		pgste = clear_pgste_bit(pgste, _PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT);
 	pgste_set_unlock(ptep, pgste);
 	preempt_enable();
 }
···
 	/* Clear storage key ACC and F, but set R/C */
 	preempt_disable();
 	pgste = pgste_get_lock(ptep);
-	pgste_val(pgste) &= ~(PGSTE_ACC_BITS | PGSTE_FP_BIT);
-	pgste_val(pgste) |= PGSTE_GR_BIT | PGSTE_GC_BIT;
+	pgste = clear_pgste_bit(pgste, PGSTE_ACC_BITS | PGSTE_FP_BIT);
+	pgste = set_pgste_bit(pgste, PGSTE_GR_BIT | PGSTE_GC_BIT);
 	ptev = pte_val(*ptep);
 	if (!(ptev & _PAGE_INVALID) && (ptev & _PAGE_WRITE))
 		page_set_storage_key(ptev & PAGE_MASK, PAGE_DEFAULT_KEY, 0);
···
 
 	pgste = pgste_get_lock(ptep);
 	dirty = !!(pgste_val(pgste) & PGSTE_UC_BIT);
-	pgste_val(pgste) &= ~PGSTE_UC_BIT;
+	pgste = clear_pgste_bit(pgste, PGSTE_UC_BIT);
 	pte = *ptep;
 	if (dirty && (pte_val(pte) & _PAGE_PRESENT)) {
 		pgste = pgste_pte_notify(mm, addr, ptep, pgste);
 		nodat = !!(pgste_val(pgste) & _PGSTE_GPS_NODAT);
 		ptep_ipte_global(mm, addr, ptep, nodat);
-		if (MACHINE_HAS_ESOP || !(pte_val(pte) & _PAGE_WRITE))
+		if (machine_has_esop() || !(pte_val(pte) & _PAGE_WRITE))
 			pte = set_pte_bit(pte, __pgprot(_PAGE_PROTECT));
 		else
 			pte = set_pte_bit(pte, __pgprot(_PAGE_INVALID));
···
 	if (!ptep)
 		goto again;
 	new = old = pgste_get_lock(ptep);
-	pgste_val(new) &= ~(PGSTE_GR_BIT | PGSTE_GC_BIT |
-			    PGSTE_ACC_BITS | PGSTE_FP_BIT);
+	new = clear_pgste_bit(new, PGSTE_GR_BIT | PGSTE_GC_BIT |
+				   PGSTE_ACC_BITS | PGSTE_FP_BIT);
 	keyul = (unsigned long) key;
-	pgste_val(new) |= (keyul & (_PAGE_CHANGED | _PAGE_REFERENCED)) << 48;
-	pgste_val(new) |= (keyul & (_PAGE_ACC_BITS | _PAGE_FP_BIT)) << 56;
+	new = set_pgste_bit(new, (keyul & (_PAGE_CHANGED | _PAGE_REFERENCED)) << 48);
+	new = set_pgste_bit(new, (keyul & (_PAGE_ACC_BITS | _PAGE_FP_BIT)) << 56);
 	if (!(pte_val(*ptep) & _PAGE_INVALID)) {
 		unsigned long bits, skey;
 
···
 		/* Set storage key ACC and FP */
 		page_set_storage_key(paddr, skey, !nq);
 		/* Merge host changed & referenced into pgste  */
-		pgste_val(new) |= bits << 52;
+		new = set_pgste_bit(new, bits << 52);
 	}
 	/* changing the guest storage key is considered a change of the page */
 	if ((pgste_val(new) ^ pgste_val(old)) &
 	    (PGSTE_ACC_BITS | PGSTE_FP_BIT | PGSTE_GR_BIT | PGSTE_GC_BIT))
-		pgste_val(new) |= PGSTE_UC_BIT;
+		new = set_pgste_bit(new, PGSTE_UC_BIT);
 
 	pgste_set_unlock(ptep, new);
 	pte_unmap_unlock(ptep, ptl);
···
 		goto again;
 	new = old = pgste_get_lock(ptep);
 	/* Reset guest reference bit only */
-	pgste_val(new) &= ~PGSTE_GR_BIT;
+	new = clear_pgste_bit(new, PGSTE_GR_BIT);
 
 	if (!(pte_val(*ptep) & _PAGE_INVALID)) {
 		paddr = pte_val(*ptep) & PAGE_MASK;
 		cc = page_reset_referenced(paddr);
 		/* Merge real referenced bit into host-set */
-		pgste_val(new) |= ((unsigned long) cc << 53) & PGSTE_HR_BIT;
+		new = set_pgste_bit(new, ((unsigned long)cc << 53) & PGSTE_HR_BIT);
 	}
 	/* Reflect guest's logical view, not physical */
 	cc |= (pgste_val(old) & (PGSTE_GR_BIT | PGSTE_GC_BIT)) >> 49;
 	/* Changing the guest storage key is considered a change of the page */
 	if ((pgste_val(new) ^ pgste_val(old)) & PGSTE_GR_BIT)
-		pgste_val(new) |= PGSTE_UC_BIT;
+		new = set_pgste_bit(new, PGSTE_UC_BIT);
 
 	pgste_set_unlock(ptep, new);
 	pte_unmap_unlock(ptep, ptl);
···
 	if (res)
 		pgstev |= _PGSTE_GPS_ZERO;
 
-	pgste_val(pgste) = pgstev;
+	pgste = __pgste(pgstev);
 	pgste_set_unlock(ptep, pgste);
 	pte_unmap_unlock(ptep, ptl);
 	return res;
···
 		return -EFAULT;
 	new = pgste_get_lock(ptep);
 
-	pgste_val(new) &= ~bits;
-	pgste_val(new) |= value & bits;
+	new = clear_pgste_bit(new, bits);
+	new = set_pgste_bit(new, value & bits);
 
 	pgste_set_unlock(ptep, new);
 	pte_unmap_unlock(ptep, ptl);

arch/s390/mm/vmem.c

···
  */
 
 #include <linux/memory_hotplug.h>
+#include <linux/cpufeature.h>
 #include <linux/memblock.h>
 #include <linux/pfn.h>
 #include <linux/mm.h>
···
 		} else if (pmd_none(*pmd)) {
 			if (IS_ALIGNED(addr, PMD_SIZE) &&
 			    IS_ALIGNED(next, PMD_SIZE) &&
-			    MACHINE_HAS_EDAT1 && direct &&
+			    cpu_has_edat1() && direct &&
 			    !debug_pagealloc_enabled()) {
 				set_pmd(pmd, __pmd(__pa(addr) | prot));
 				pages++;
 				continue;
-			} else if (!direct && MACHINE_HAS_EDAT1) {
+			} else if (!direct && cpu_has_edat1()) {
 				void *new_page;
 
 				/*
···
 		} else if (pud_none(*pud)) {
 			if (IS_ALIGNED(addr, PUD_SIZE) &&
 			    IS_ALIGNED(next, PUD_SIZE) &&
-			    MACHINE_HAS_EDAT2 && direct &&
+			    cpu_has_edat2() && direct &&
 			    !debug_pagealloc_enabled()) {
 				set_pud(pud, __pud(__pa(addr) | prot));
 				pages++;
···
 	 * prefix page is used to return to the previous context with
 	 * an LPSWE instruction and therefore must be executable.
 	 */
-	if (!static_key_enabled(&cpu_has_bear))
+	if (!cpu_has_bear())
 		set_memory_x(0, 1);
 	if (debug_pagealloc_enabled())
 		__set_memory_4k(__va(0), absolute_pointer(__va(0)) + ident_map_size);

arch/s390/pci/pci.c

···
 #include <linux/lockdep.h>
 #include <linux/list_sort.h>
 
+#include <asm/machine.h>
 #include <asm/isc.h>
 #include <asm/airq.h>
 #include <asm/facility.h>
···
 		return NULL;
 	}
 	if (!strcmp(str, "nomio")) {
-		get_lowcore()->machine_flags &= ~MACHINE_FLAG_PCI_MIO;
+		clear_machine_feature(MFEATURE_PCI_MIO);
 		return NULL;
 	}
 	if (!strcmp(str, "force_floating")) {
···
 		return 0;
 	}
 
-	if (MACHINE_HAS_PCI_MIO) {
+	if (test_machine_feature(MFEATURE_PCI_MIO)) {
 		static_branch_enable(&have_mio);
 		system_ctl_set_bit(2, CR2_MIO_ADDRESSING_BIT);
 	}

arch/s390/pci/pci_clp.c

···
 	int cc, exception;
 
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"	.insn	rrf,0xb9a00000,%[mask],%[cmd],8,0\n"
 		"0:	lhi	%[exc],0\n"
 		"1:\n"
···
 	u64 ignored;
 
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"	.insn	rrf,0xb9a00000,%[ign],%[req],0,%[lps]\n"
 		"0:	lhi	%[exc],0\n"
 		"1:\n"

arch/s390/pci/pci_insn.c

···
 	u64 __data;
 
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"	.insn	rre,0xb9d20000,%[data],%[req_off]\n"
 		"0:	lhi	%[exc],0\n"
 		"1:\n"
···
 	u64 __data;
 
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"       .insn   rre,0xb9d60000,%[data],%[ioaddr_len]\n"
 		"0:	lhi	%[exc],0\n"
 		"1:\n"
···
 	int cc, exception;
 
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"	.insn	rre,0xb9d00000,%[data],%[req_off]\n"
 		"0:	lhi	%[exc],0\n"
 		"1:\n"
···
 	int cc, exception;
 
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"       .insn   rre,0xb9d40000,%[data],%[ioaddr_len]\n"
 		"0:	lhi	%[exc],0\n"
 		"1:\n"
···
 	int cc, exception;
 
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"	.insn	rsy,0xeb00000000d0,%[req],%[offset],%[data]\n"
 		"0:	lhi	%[exc],0\n"
 		"1:\n"
···
 	int cc, exception;
 
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"       .insn   rsy,0xeb00000000d4,%[len],%[ioaddr],%[data]\n"
 		"0:	lhi	%[exc],0\n"
 		"1:\n"

arch/s390/pci/pci_mmio.c

···
 	int cc, exception;
 
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"	sacf	256\n"
 		"0:	.insn	rsy,0xeb00000000d4,%[len],%[ioaddr],%[src]\n"
 		"1:	lhi	%[exc],0\n"
···
 	 * address space. pcistg then uses the user mappings.
 	 */
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"	sacf	256\n"
 		"0:	llgc	%[tmp],0(%[src])\n"
 		"4:	sllg	%[val],%[val],8\n"
···
 	 * user address @dst
 	 */
 	exception = 1;
-	asm volatile (
+	asm_inline volatile (
 		"	sacf	256\n"
 		"0:	.insn	rre,0xb9d60000,%[val],%[ioaddr_len]\n"
 		"1:	lhi	%[exc],0\n"

drivers/s390/block/dasd.c

···
 #include <linux/seq_file.h>
 #include <linux/vmalloc.h>
 
+#include <asm/machine.h>
 #include <asm/ccwdev.h>
 #include <asm/ebcdic.h>
 #include <asm/idals.h>
···
 	struct diag210 diag_data;
 	int rc;
 
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return 0;
 	ccw_device_get_id(device->cdev, &dev_id);
 	memset(&diag_data, 0, sizeof(diag_data));

drivers/s390/block/dasd_devmap.c

···
 #include <linux/module.h>
 #include <linux/slab.h>
 
+#include <asm/machine.h>
 #include <asm/debug.h>
 #include <linux/uaccess.h>
 #include <asm/ipl.h>
···
 		return 0;
         }
 	if (strncmp("nopav", keyword, length) == 0) {
-		if (MACHINE_IS_VM)
+		if (machine_is_vm())
 			pr_info("'nopav' is not supported on z/VM\n");
 		else {
 			dasd_nopav = 1;

drivers/s390/block/dasd_diag.c

···
 #include <linux/init.h>
 #include <linux/jiffies.h>
 #include <asm/asm-extable.h>
+#include <asm/machine.h>
 #include <asm/dasd.h>
 #include <asm/debug.h>
 #include <asm/diag.h>
···
 	} addr_type;
 
 	exception = 1;
-	asm volatile(
+	asm_inline volatile(
 		"	diag	%[rx],%[cmd],0x250\n"
 		"0:	lhi	%[exc],0\n"
 		"1:\n"
···
 static int __init
 dasd_diag_init(void)
 {
-	if (!MACHINE_IS_VM) {
+	if (!machine_is_vm()) {
 		pr_info("Discipline %s cannot be used without z/VM\n",
 			dasd_diag_discipline.name);
 		return -ENODEV;

drivers/s390/block/dasd_eckd.c

···
 #include <linux/io.h>
 
 #include <asm/css_chars.h>
+#include <asm/machine.h>
 #include <asm/debug.h>
 #include <asm/idals.h>
 #include <asm/ebcdic.h>
···
 	if (private->uid.type == UA_BASE_PAV_ALIAS ||
 	    private->uid.type == UA_HYPER_PAV_ALIAS)
 		return 0;
-	if (dasd_nopav || MACHINE_IS_VM)
+	if (dasd_nopav || machine_is_vm())
 		enable_pav = 0;
 	else
 		enable_pav = 1;

drivers/s390/char/con3215.c

···
 #include <linux/reboot.h>
 #include <linux/serial.h> /* ASYNC_* flags */
 #include <linux/slab.h>
+#include <asm/machine.h>
 #include <asm/ccwdev.h>
 #include <asm/cio.h>
 #include <linux/io.h>
···
 		return -ENODEV;
 
 	/* Set the console mode for VM */
-	if (MACHINE_IS_VM) {
+	if (machine_is_vm()) {
 		cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
 		cpcmd("TERM AUTOCR OFF", NULL, 0, NULL);
 	}

drivers/s390/char/con3270.c

···
 #include <linux/memblock.h>
 #include <linux/compat.h>
 
+#include <asm/machine.h>
 #include <asm/ccwdev.h>
 #include <asm/cio.h>
 #include <asm/ebcdic.h>
···
 		return -ENODEV;
 
 	/* Set the console mode for VM */
-	if (MACHINE_IS_VM) {
+	if (machine_is_vm()) {
 		cpcmd("TERM CONMODE 3270", NULL, 0, NULL);
 		cpcmd("TERM AUTOCR OFF", NULL, 0, NULL);
 	}

drivers/s390/char/diag_ftp.c

···
 	int rc;
 
 	diag_stat_inc(DIAG_STAT_X2C4);
-	asm volatile(
+	asm_inline volatile(
 		"	diag	%[addr],%[cmd],0x2c4\n"
 		"0:	j	2f\n"
 		"1:	la	%[rc],%[err]\n"

drivers/s390/char/hmcdrv_ftp.c

···
 #include <linux/ctype.h>
 #include <linux/crc16.h>
 
+#include <asm/machine.h>
+
 #include "hmcdrv_ftp.h"
 #include "hmcdrv_cache.h"
 #include "sclp_ftp.h"
···
 	mutex_lock(&hmcdrv_ftp_mutex); /* block transfers while start-up */
 
 	if (hmcdrv_ftp_refcnt == 0) {
-		if (MACHINE_IS_VM)
+		if (machine_is_vm())
 			hmcdrv_ftp_funcs = &hmcdrv_ftp_zvm;
-		else if (MACHINE_IS_LPAR || MACHINE_IS_KVM)
+		else if (machine_is_lpar() || machine_is_kvm())
 			hmcdrv_ftp_funcs = &hmcdrv_ftp_lpar;
 		else
 			rc = -EOPNOTSUPP;

drivers/s390/char/monreader.c

···
 #include <linux/slab.h>
 #include <net/iucv/iucv.h>
 #include <linux/uaccess.h>
+#include <asm/machine.h>
 #include <asm/ebcdic.h>
 #include <asm/extmem.h>
 
···
 {
 	int rc;
 
-	if (!MACHINE_IS_VM) {
+	if (!machine_is_vm()) {
 		pr_err("The z/VM *MONITOR record device driver cannot be "
 		       "loaded without z/VM\n");
 		return -ENODEV;

drivers/s390/char/monwriter.c

···
 #include <linux/slab.h>
 #include <linux/uaccess.h>
 #include <linux/io.h>
+#include <asm/machine.h>
 #include <asm/ebcdic.h>
 #include <asm/appldata.h>
 #include <asm/monwriter.h>
···
 
 static int __init mon_init(void)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return -ENODEV;
 	/*
 	 * misc_register() has to be the last action in module_init(), because

drivers/s390/char/raw3270.c

···
 #include <linux/types.h>
 #include <linux/wait.h>
 
+#include <asm/machine.h>
 #include <asm/ccwdev.h>
 #include <asm/cio.h>
 #include <asm/ebcdic.h>
···
 	if (rq->rc) {
 		/* Reset command failed. */
 		rp->state = RAW3270_STATE_INIT;
-	} else if (MACHINE_IS_VM) {
+	} else if (machine_is_vm()) {
 		raw3270_size_device_vm(rp);
 		raw3270_size_device_done(rp);
 	} else {

drivers/s390/char/sclp.h

···
 #include <linux/types.h>
 #include <linux/list.h>
 #include <asm/asm-extable.h>
+#include <asm/machine.h>
 #include <asm/sclp.h>
 #include <asm/ebcdic.h>
 #include <asm/asm.h>
···
 	int cc, exception;
 
 	exception = 1;
-	asm volatile(
+	asm_inline volatile(
 		"0:	.insn	rre,0xb2200000,%[cmd],%[sccb]\n" /* servc */
 		"1:	lhi	%[exc],0\n"
 		"2:\n"
···
 static inline unsigned char
 sclp_ascebc(unsigned char ch)
 {
-	return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
+	return (machine_is_vm()) ? _ascebc[ch] : _ascebc_500[ch];
 }
 
 /* translate string from EBCDIC to ASCII */
 static inline void
 sclp_ebcasc_str(char *str, int nr)
 {
-	(MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
+	(machine_is_vm()) ? EBCASC(str, nr) : EBCASC_500(str, nr);
 }
 
 /* translate string from ASCII to EBCDIC */
 static inline void
 sclp_ascebc_str(char *str, int nr)
 {
-	(MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
+	(machine_is_vm()) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
 }
 
 static inline struct gds_vector *

drivers/s390/char/sclp_cmd.c

···
 #define KMSG_COMPONENT "sclp_cmd"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/cpufeature.h>
 #include <linux/completion.h>
 #include <linux/init.h>
 #include <linux/errno.h>
···
 		goto skip_add;
 	for (addr = start; addr < start + size; addr += block_size)
 		add_memory(0, addr, block_size,
-			   MACHINE_HAS_EDAT1 ?
+			   cpu_has_edat1() ?
 			   MHP_MEMMAP_ON_MEMORY | MHP_OFFLINE_INACCESSIBLE : MHP_NONE);
 skip_add:
 	first_rn = rn;

drivers/s390/char/sclp_con.c

···
 };
 
 /*
+ *  Release allocated pages.
+ */
+static void __init __sclp_console_free_pages(void)
+{
+	struct list_head *page, *p;
+
+	list_for_each_safe(page, p, &sclp_con_pages) {
+		list_del(page);
+		free_page((unsigned long)page);
+	}
+}
+
+/*
  * called by console_init() in drivers/char/tty_io.c at boot-time.
  */
 static int __init
···
 	/* Allocate pages for output buffering */
 	for (i = 0; i < sclp_console_pages; i++) {
 		page = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+		if (!page) {
+			__sclp_console_free_pages();
+			return -ENOMEM;
+		}
 		list_add_tail(page, &sclp_con_pages);
 	}
 	sclp_conbuf = NULL;

drivers/s390/char/sclp_early.c

···
 	sclp.has_aeni = !!(sccb->fac118 & 0x20);
 	sclp.has_aisi = !!(sccb->fac118 & 0x10);
 	sclp.has_zpci_lsi = !!(sccb->fac118 & 0x01);
-	if (sccb->fac85 & 0x02)
-		get_lowcore()->machine_flags |= MACHINE_FLAG_ESOP;
-	if (sccb->fac91 & 0x40)
-		get_lowcore()->machine_flags |= MACHINE_FLAG_TLB_GUEST;
 	sclp.has_diag204_bif = !!(sccb->fac98 & 0x80);
 	sclp.has_diag310 = !!(sccb->fac91 & 0x80);
 	if (sccb->cpuoff > 134) {
···
 		sclp.hamax = U64_MAX;
 
 	if (!sccb->hcpua) {
-		if (MACHINE_IS_VM)
+		if (machine_is_vm())
 			sclp.max_cores = 64;
 		else
 			sclp.max_cores = sccb->ncpurl;

drivers/s390/char/sclp_early_core.c

···
 #include <asm/sections.h>
 #include <asm/physmem_info.h>
 #include <asm/facility.h>
+#include <asm/machine.h>
 #include "sclp.h"
 #include "sclp_rw.h"
 
···
 	if (sclp_info_sccb.hsa_size)
 		*hsa_size = (sclp_info_sccb.hsa_size - 1) * PAGE_SIZE;
 	return 0;
+}
+
+void __init sclp_early_detect_machine_features(void)
+{
+	struct read_info_sccb *sccb = &sclp_info_sccb;
+
+	if (!sclp_info_sccb_valid)
+		return;
+	if (sccb->fac85 & 0x02)
+		set_machine_feature(MFEATURE_ESOP);
+	if (sccb->fac91 & 0x40)
+		set_machine_feature(MFEATURE_TLB_GUEST);
 }
 
 #define SCLP_STORAGE_INFO_FACILITY     0x0000400000000000UL

drivers/s390/char/sclp_tty.c

···
 	.flush_buffer = sclp_tty_flush_buffer,
 };
 
+/* Release allocated pages. */
+static void __init __sclp_tty_free_pages(void)
+{
+	struct list_head *page, *p;
+
+	list_for_each_safe(page, p, &sclp_tty_pages) {
+		list_del(page);
+		free_page((unsigned long)page);
+	}
+}
+
 static int __init
 sclp_tty_init(void)
 {
···
 	int rc;
 
 	/* z/VM multiplexes the line mode output on the 32xx screen */
-	if (MACHINE_IS_VM && !CONSOLE_IS_SCLP)
+	if (machine_is_vm() && !CONSOLE_IS_SCLP)
 		return 0;
 	if (!sclp.has_linemode)
 		return 0;
···
 	for (i = 0; i < MAX_KMEM_PAGES; i++) {
 		page = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
 		if (page == NULL) {
+			__sclp_tty_free_pages();
 			tty_driver_kref_put(driver);
 			return -ENOMEM;
 		}
···
 	timer_setup(&sclp_tty_timer, sclp_tty_timeout, 0);
 	sclp_ttybuf = NULL;
 	sclp_tty_buffer_count = 0;
-	if (MACHINE_IS_VM) {
+	if (machine_is_vm()) {
 		/* case input lines to lowercase */
 		sclp_tty_tolower = 1;
 	}

drivers/s390/char/vmcp.c

···
 #include <linux/mutex.h>
 #include <linux/cma.h>
 #include <linux/mm.h>
+#include <asm/machine.h>
 #include <asm/cpcmd.h>
 #include <asm/debug.h>
 #include <asm/vmcp.h>
···
 
 void __init vmcp_cma_reserve(void)
 {
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return;
 	cma_declare_contiguous(0, vmcp_cma_size, 0, 0, 0, false, "vmcp", &vmcp_cma);
 }
···
 {
 	int ret;
 
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return 0;
 
 	vmcp_debug = debug_register("vmcp", 1, 1, 240);

drivers/s390/char/vmlogrdr.c

···
 #include <linux/spinlock.h>
 #include <linux/atomic.h>
 #include <linux/uaccess.h>
+#include <asm/machine.h>
 #include <asm/cpcmd.h>
 #include <asm/debug.h>
 #include <asm/ebcdic.h>
···
 	int i;
 	dev_t dev;
 
-	if (! MACHINE_IS_VM) {
+	if (!machine_is_vm()) {
 		pr_err("not running under VM, driver not loaded.\n");
 		return -ENODEV;
 	}

drivers/s390/char/vmur.c

···
 #include <linux/kobject.h>
 
 #include <linux/uaccess.h>
+#include <asm/machine.h>
 #include <asm/cio.h>
 #include <asm/ccwdev.h>
 #include <asm/debug.h>
···
 	int rc;
 	dev_t dev;
 
-	if (!MACHINE_IS_VM) {
+	if (!machine_is_vm()) {
 		pr_err("The %s cannot be loaded without z/VM\n",
 		       ur_banner);
 		return -ENODEV;

drivers/s390/cio/crw.c

···
 		if (unlikely(chain > 1)) {
 			struct crw tmp_crw;
 
-			printk(KERN_WARNING"%s: Code does not support more "
-			       "than two chained crws; please report to "
-			       "[e-mail]!\n", __func__);
+			printk(KERN_WARNING "%s: Code does not support more than two chained crws\n",
+			       __func__);
 			ccode = stcrw(&tmp_crw);
 			printk(KERN_WARNING"%s: crw reports slct=%d, oflw=%d, "
 			       "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",

drivers/s390/cio/device_id.c

···
 #include <linux/string.h>
 #include <linux/types.h>
 #include <linux/errno.h>
+#include <asm/machine.h>
 #include <asm/ccwdev.h>
 #include <asm/setup.h>
 #include <asm/cio.h>
···
 	struct senseid *senseid = &cdev->private->dma_area->senseid;
 	int vm = 0;
 
-	if (rc && MACHINE_IS_VM) {
+	if (rc && machine_is_vm()) {
 		/* Try diag 0x210 fallback on z/VM. */
 		snsid_init(cdev);
 		if (diag210_get_dev_info(cdev) == 0) {

drivers/s390/cio/ioasm.c

···
 	int ccode, exception;
 
 	exception = 1;
-	asm volatile(
+	asm_inline volatile(
 		"	lgr	1,%[r1]\n"
 		"	stsch	%[addr]\n"
 		"0:	lhi	%[exc],0\n"
···
 	int ccode, exception;
 
 	exception = 1;
-	asm volatile(
+	asm_inline volatile(
 		"	lgr	1,%[r1]\n"
 		"	msch	%[addr]\n"
 		"0:	lhi	%[exc],0\n"
···
 	int ccode, exception;
 
 	exception = 1;
-	asm volatile(
+	asm_inline volatile(
 		"	lgr	1,%[r1]\n"
 		"	ssch	%[addr]\n"
 		"0:	lhi	%[exc],0\n"
···
 	int cc, exception;
 
 	exception = 1;
-	asm volatile(
+	asm_inline volatile(
 		"	.insn	rre,0xb25f0000,%[chsc_area],0\n"
 		"0:	lhi	%[exc],0\n"
 		"1:\n"

drivers/s390/cio/vfio_ccw_drv.c

···
 		return -ENODEV;
 	}
 
-	parent = kzalloc(struct_size(parent, mdev_types, 1), GFP_KERNEL);
+	parent = kzalloc(sizeof(*parent), GFP_KERNEL);
 	if (!parent)
 		return -ENOMEM;
 
···
 
 	parent->mdev_type.sysfs_name = "io";
 	parent->mdev_type.pretty_name = "I/O subchannel (Non-QDIO)";
-	parent->mdev_types[0] = &parent->mdev_type;
+	parent->mdev_types = &parent->mdev_type;
 	ret = mdev_register_parent(&parent->parent, &sch->dev,
 				   &vfio_ccw_mdev_driver,
-				   parent->mdev_types, 1);
+				   &parent->mdev_types, 1);
 	if (ret)
 		goto out_unreg;
 

drivers/s390/cio/vfio_ccw_private.h

···
 
 	struct mdev_parent	parent;
 	struct mdev_type	mdev_type;
-	struct mdev_type	*mdev_types[];
+	struct mdev_type	*mdev_types;
 };
 
 /**

drivers/s390/crypto/ap_bus.c

···
 #include <linux/notifier.h>
 #include <linux/kthread.h>
 #include <linux/mutex.h>
+#include <asm/machine.h>
 #include <asm/airq.h>
 #include <asm/tpi.h>
 #include <linux/atomic.h>
···
 	 * Setup the high resolution poll timer.
 	 * If we are running under z/VM adjust polling to z/VM polling rate.
 	 */
-	if (MACHINE_IS_VM)
+	if (machine_is_vm())
 		poll_high_timeout = 1500000;
 	hrtimer_setup(&ap_poll_timer, ap_poll_timeout, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
 

drivers/s390/crypto/vfio_ap_ops.c

···
 	matrix->adm_max = info->apxa ? info->nd : 15;
 }
 
+static void signal_guest_ap_cfg_changed(struct ap_matrix_mdev *matrix_mdev)
+{
+	if (matrix_mdev->cfg_chg_trigger)
+		eventfd_signal(matrix_mdev->cfg_chg_trigger);
+}
+
 static void vfio_ap_mdev_update_guest_apcb(struct ap_matrix_mdev *matrix_mdev)
 {
-	if (matrix_mdev->kvm)
+	if (matrix_mdev->kvm) {
 		kvm_arch_crypto_set_masks(matrix_mdev->kvm,
 					  matrix_mdev->shadow_apcb.apm,
 					  matrix_mdev->shadow_apcb.aqm,
 					  matrix_mdev->shadow_apcb.adm);
+
+		signal_guest_ap_cfg_changed(matrix_mdev);
+	}
 }
 
 static bool vfio_ap_mdev_filter_cdoms(struct ap_matrix_mdev *matrix_mdev)
···
 	if (ret)
 		goto err_put_vdev;
 	matrix_mdev->req_trigger = NULL;
+	matrix_mdev->cfg_chg_trigger = NULL;
 	dev_set_drvdata(&mdev->dev, matrix_mdev);
 	mutex_lock(&matrix_dev->mdevs_lock);
 	list_add(&matrix_mdev->node, &matrix_dev->mdev_list);
···
 
 	matrix_mdev = container_of(vdev, struct ap_matrix_mdev, vdev);
 
+	get_update_locks_for_mdev(matrix_mdev);
+
+	if (matrix_mdev->kvm) {
+		kvm_arch_crypto_clear_masks(matrix_mdev->kvm);
+		signal_guest_ap_cfg_changed(matrix_mdev);
+	}
+
 	if (matrix_mdev->req_trigger) {
 		if (!(count % 10))
 			dev_notice_ratelimited(dev,
···
 		dev_notice(dev,
 			   "No device request registered, blocked until released by user\n");
 	}
+
+	release_update_locks_for_mdev(matrix_mdev);
 }
 
 static int vfio_ap_mdev_get_device_info(unsigned long arg)
···
 
 	switch (info.index) {
 	case VFIO_AP_REQ_IRQ_INDEX:
+		info.count = 1;
+		info.flags = VFIO_IRQ_INFO_EVENTFD;
+		break;
+	case VFIO_AP_CFG_CHG_IRQ_INDEX:
 		info.count = 1;
 		info.flags = VFIO_IRQ_INFO_EVENTFD;
 		break;
···
 	return 0;
 }
 
+static int vfio_ap_set_cfg_change_irq(struct ap_matrix_mdev *matrix_mdev, unsigned long arg)
+{
+	s32 fd;
+	void __user *data;
+	unsigned long minsz;
+	struct eventfd_ctx *cfg_chg_trigger;
+
+	minsz = offsetofend(struct vfio_irq_set, count);
+	data = (void __user *)(arg + minsz);
+
+	if (get_user(fd, (s32 __user *)data))
+		return -EFAULT;
+
+	if (fd == -1) {
+		if (matrix_mdev->cfg_chg_trigger)
+			eventfd_ctx_put(matrix_mdev->cfg_chg_trigger);
+		matrix_mdev->cfg_chg_trigger = NULL;
+	} else if (fd >= 0) {
+		cfg_chg_trigger = eventfd_ctx_fdget(fd);
+		if (IS_ERR(cfg_chg_trigger))
+			return PTR_ERR(cfg_chg_trigger);
+
+		if (matrix_mdev->cfg_chg_trigger)
+			eventfd_ctx_put(matrix_mdev->cfg_chg_trigger);
+
+		matrix_mdev->cfg_chg_trigger = cfg_chg_trigger;
+	} else {
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int vfio_ap_set_irqs(struct ap_matrix_mdev *matrix_mdev,
 			    unsigned long arg)
 {
···
 		switch (irq_set.index) {
 		case VFIO_AP_REQ_IRQ_INDEX:
 			return vfio_ap_set_request_irq(matrix_mdev, arg);
+		case VFIO_AP_CFG_CHG_IRQ_INDEX:
+			return vfio_ap_set_cfg_change_irq(matrix_mdev, arg);
 		default:
 			return -EINVAL;
 		}
···
 		ret = vfio_ap_mdev_reset_queues(matrix_mdev);
 		break;
 	case VFIO_DEVICE_GET_IRQ_INFO:
-			ret = vfio_ap_get_irq_info(arg);
-			break;
+		ret = vfio_ap_get_irq_info(arg);
+		break;
 	case VFIO_DEVICE_SET_IRQS:
 		ret = vfio_ap_set_irqs(matrix_mdev, arg);
 		break;
···
 
 	matrix_dev->mdev_type.sysfs_name = VFIO_AP_MDEV_TYPE_HWVIRT;
 	matrix_dev->mdev_type.pretty_name = VFIO_AP_MDEV_NAME_HWVIRT;
-	matrix_dev->mdev_types[0] = &matrix_dev->mdev_type;
+	matrix_dev->mdev_types = &matrix_dev->mdev_type;
 	ret = mdev_register_parent(&matrix_dev->parent, &matrix_dev->device,
 				   &vfio_ap_matrix_driver,
-				   matrix_dev->mdev_types, 1);
+				   &matrix_dev->mdev_types, 1);
 	if (ret)
 		goto err_driver;
 	return 0;

drivers/s390/crypto/vfio_ap_private.h

···
 	struct mutex guests_lock; /* serializes access to each KVM guest */
 	struct mdev_parent parent;
 	struct mdev_type mdev_type;
-	struct mdev_type *mdev_types[1];
+	struct mdev_type *mdev_types;
 };
 
 extern struct ap_matrix_dev *matrix_dev;
···
  * @mdev:	the mediated device
  * @qtable:	table of queues (struct vfio_ap_queue) assigned to the mdev
  * @req_trigger eventfd ctx for signaling userspace to return a device
+ * @cfg_chg_trigger eventfd ctx to signal AP config changed to userspace
  * @apm_add:	bitmap of APIDs added to the host's AP configuration
  * @aqm_add:	bitmap of APQIs added to the host's AP configuration
  * @adm_add:	bitmap of control domain numbers added to the host's AP
···
 	struct mdev_device *mdev;
 	struct ap_queue_table qtable;
 	struct eventfd_ctx *req_trigger;
+	struct eventfd_ctx *cfg_chg_trigger;
 	DECLARE_BITMAP(apm_add, AP_DEVICES);
 	DECLARE_BITMAP(aqm_add, AP_DOMAINS);
 	DECLARE_BITMAP(adm_add, AP_DOMAINS);

drivers/s390/net/qeth_l2_main.c

···
 #include <linux/hash.h>
 #include <linux/hashtable.h>
 #include <net/switchdev.h>
+#include <asm/machine.h>
 #include <asm/chsc.h>
 #include <asm/css_chars.h>
 #include <asm/setup.h>
···
 
 	QETH_CARD_TEXT(card, 2, "l2reqmac");
 
-	if (MACHINE_IS_VM) {
+	if (machine_is_vm()) {
 		rc = qeth_vm_request_mac(card);
 		if (!rc)
 			goto out;

drivers/s390/net/smsgiucv.c

···
 #include <linux/device.h>
 #include <linux/slab.h>
 #include <net/iucv/iucv.h>
+#include <asm/machine.h>
 #include <asm/cpcmd.h>
 #include <asm/ebcdic.h>
 #include "smsgiucv.h"
···
 {
 	int rc;
 
-	if (!MACHINE_IS_VM) {
+	if (!machine_is_vm()) {
 		rc = -EPROTONOSUPPORT;
 		goto out;
 	}

drivers/s390/net/smsgiucv_app.c

···
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
 #include <net/iucv/iucv.h>
+#include <asm/machine.h>
 #include "smsgiucv.h"
 
 /* prefix used for SMSG registration */
···
 	struct device_driver *smsgiucv_drv;
 	int rc;
 
-	if (!MACHINE_IS_VM)
+	if (!machine_is_vm())
 		return -ENODEV;
 
 	smsgiucv_drv = driver_find(SMSGIUCV_DRV_NAME, &iucv_bus);

drivers/s390/scsi/zfcp_aux.c

···
 
 #define ZFCP_BUS_ID_SIZE	20
 
-MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - [e-mail]");
+MODULE_AUTHOR("IBM Corporation");
 MODULE_DESCRIPTION("FCP HBA driver");
 MODULE_LICENSE("GPL");
 

drivers/tty/hvc/hvc_iucv.c

···
 #include <linux/tty.h>
 #include <linux/wait.h>
 #include <net/iucv/iucv.h>
+#include <asm/machine.h>
 
 #include "hvc_console.h"
 
···
 {
 	int rc;
 
-	if (!MACHINE_IS_VM || !hvc_iucv_devices)
+	if (!machine_is_vm() || !hvc_iucv_devices)
 		return -ENODEV;
 
 	if (!val)
···
 	size_t index, len;
 	void *start, *end;
 
-	if (!MACHINE_IS_VM || !hvc_iucv_devices)
+	if (!machine_is_vm() || !hvc_iucv_devices)
 		return -ENODEV;
 
 	rc = 0;
···
 	if (!hvc_iucv_devices)
 		return -ENODEV;
 
-	if (!MACHINE_IS_VM) {
+	if (!machine_is_vm()) {
 		pr_notice("The z/VM IUCV HVC device driver cannot "
 			   "be used without z/VM\n");
 		rc = -ENODEV;

drivers/watchdog/diag288_wdt.c

···
 #include <linux/moduleparam.h>
 #include <linux/slab.h>
 #include <linux/watchdog.h>
+#include <asm/machine.h>
 #include <asm/ebcdic.h>
 #include <asm/diag.h>
 #include <linux/io.h>
···
 	int ret;
 	unsigned int func;
 
-	if (MACHINE_IS_VM) {
+	if (machine_is_vm()) {
 		func = conceal_on ? (WDT_FUNC_INIT | WDT_FUNC_CONCEAL)
 			: WDT_FUNC_INIT;
 		ret = diag288_str(func, dev->timeout, wdt_cmd);
···
 	int ret;
 	unsigned int func;
 
-	if (MACHINE_IS_VM) {
+	if (machine_is_vm()) {
 		/*
 		 * It seems to be ok to z/VM to use the init function to
 		 * retrigger the watchdog. On LPAR WDT_FUNC_CHANGE must
···
 
 	watchdog_set_nowayout(&wdt_dev, nowayout_info);
 
-	if (MACHINE_IS_VM) {
+	if (machine_is_vm()) {
 		cmd_buf = kmalloc(MAX_CMDLEN, GFP_KERNEL);
 		if (!cmd_buf) {
 			pr_err("The watchdog cannot be initialized\n");

include/uapi/linux/vfio.h

···
  */
 enum {
 	VFIO_AP_REQ_IRQ_INDEX,
+	VFIO_AP_CFG_CHG_IRQ_INDEX,
 	VFIO_AP_NUM_IRQS
 };
 

kernel/sysctl.c

···
 		.extra1		= SYSCTL_ZERO,
 		.extra2		= SYSCTL_MAXOLDUID,
 	},
-#ifdef CONFIG_S390
-	{
-		.procname	= "userprocess_debug",
-		.data		= &show_unhandled_signals,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
-	},
-#endif
 	{
 		.procname	= "panic_on_oops",
 		.data		= &panic_on_oops,
···
 		.procname	= "randomize_va_space",
 		.data		= &randomize_va_space,
 		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
-	},
-#endif
-#if defined(CONFIG_S390) && defined(CONFIG_SMP)
-	{
-		.procname	= "spin_retry",
-		.data		= &spin_retry,
-		.maxlen		= sizeof (int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},

lib/raid6/s390vx.uc

···
  * This file is postprocessed using unroll.awk.
  */
 
+#include <linux/cpufeature.h>
 #include <linux/raid/pq.h>
 #include <asm/fpu.h>
 

net/iucv/af_iucv.c

···
 #include <linux/poll.h>
 #include <linux/security.h>
 #include <net/sock.h>
+#include <asm/machine.h>
 #include <asm/ebcdic.h>
 #include <asm/cpcmd.h>
 #include <linux/kmod.h>
···
 {
 	int err;
 
-	if (MACHINE_IS_VM && IS_ENABLED(CONFIG_IUCV)) {
+	if (machine_is_vm() && IS_ENABLED(CONFIG_IUCV)) {
 		cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err);
 		if (unlikely(err)) {
 			WARN_ON(err);

net/iucv/iucv.c

···
 #include <linux/reboot.h>
 #include <net/iucv/iucv.h>
 #include <linux/atomic.h>
+#include <asm/machine.h>
 #include <asm/ebcdic.h>
 #include <asm/io.h>
 #include <asm/irq.h>
···
 {
 	int rc;
 
-	if (!MACHINE_IS_VM) {
+	if (!machine_is_vm()) {
 		rc = -EPROTONOSUPPORT;
 		goto out;
 	}