Merge tag 'm68k-for-v6.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

Pull m68k updates from Geert Uytterhoeven:

- Add seccomp support

- defconfig updates

- Miscellaneous fixes and improvements

* tag 'm68k-for-v6.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
m68k: /proc/hardware should depend on PROC_FS
selftests/seccomp: Add m68k support
m68k: Add kernel seccomp support
m68k: Check syscall_trace_enter() return code
m68k: defconfig: Update defconfigs for v6.2-rc3
m68k: q40: Do not initialise statics to 0

Documentation/features/seccomp/seccomp-filter/arch-support.txt

···
     |     hexagon: | TODO |
     |        ia64: | TODO |
     |   loongarch: |  ok  |
-    |        m68k: | TODO |
+    |        m68k: |  ok  |
     |  microblaze: | TODO |
     |        mips: |  ok  |
     |       nios2: | TODO |

arch/m68k/68000/entry.S

···
 	jbsr	syscall_trace_enter
 	RESTORE_SWITCH_STACK
 	addql	#4,%sp
+	addql	#1,%d0
+	jeq	ret_from_exception
 	movel	%sp@(PT_OFF_ORIG_D0),%d1
 	movel	#-ENOSYS,%d0
 	cmpl	#NR_syscalls,%d1

arch/m68k/Kconfig

···
 	select GENERIC_CPU_DEVICES
 	select GENERIC_IOMAP
 	select GENERIC_IRQ_SHOW
+	select HAVE_ARCH_SECCOMP
+	select HAVE_ARCH_SECCOMP_FILTER
 	select HAVE_ASM_MODVERSIONS
 	select HAVE_DEBUG_BUGVERBOSE
 	select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_HAS_NO_UNALIGNED

arch/m68k/Kconfig.devices

···
 # We have a dedicated heartbeat LED. :-)
 config PROC_HARDWARE
 	bool "/proc/hardware support"
+	depends on PROC_FS
 	help
 	  Say Y here to support the /proc/hardware file, which gives you
 	  access to information about the machine you're running on,

arch/m68k/coldfire/entry.S

···
 	jbsr	syscall_trace_enter
 	RESTORE_SWITCH_STACK
 	addql	#4,%sp
+	addql	#1,%d0
+	jeq	ret_from_exception
 	movel	%d3,%a0
 	jbsr	%a0@
 	movel	%d0,%sp@(PT_OFF_D0)		/* save the return value */

arch/m68k/configs/amiga_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/apollo_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/atari_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/bvme6000_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/hp300_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/mac_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/multi_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 # CONFIG_WIRELESS is not set
 CONFIG_PSAMPLE=m
 CONFIG_NET_IFE=m
+CONFIG_PCCARD=y
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/mvme147_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/mvme16x_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/q40_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/sun3_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/configs/sun3x_defconfig

···
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
···
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
···
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m

arch/m68k/include/asm/seccomp.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _ASM_SECCOMP_H
+#define _ASM_SECCOMP_H
+
+#include <asm-generic/seccomp.h>
+
+#define SECCOMP_ARCH_NATIVE		AUDIT_ARCH_M68K
+#define SECCOMP_ARCH_NATIVE_NR		NR_syscalls
+#define SECCOMP_ARCH_NATIVE_NAME	"m68k"
+
+#endif /* _ASM_SECCOMP_H */

arch/m68k/include/asm/syscall.h

···
 
 #include <uapi/linux/audit.h>
 
+#include <asm/unistd.h>
+
+extern const unsigned long sys_call_table[];
+
+static inline int syscall_get_nr(struct task_struct *task,
+				 struct pt_regs *regs)
+{
+	return regs->orig_d0;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+				    struct pt_regs *regs)
+{
+	regs->d0 = regs->orig_d0;
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+				     struct pt_regs *regs)
+{
+	unsigned long error = regs->d0;
+
+	return IS_ERR_VALUE(error) ? error : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+					    struct pt_regs *regs)
+{
+	return regs->d0;
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+					    struct pt_regs *regs,
+					    int error, long val)
+{
+	regs->d0 = (long)error ?: val;
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+					 struct pt_regs *regs,
+					 unsigned long *args)
+{
+	args[0] = regs->orig_d0;
+	args++;
+
+	memcpy(args, &regs->d1, 5 * sizeof(args[0]));
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+					 struct pt_regs *regs,
+					 unsigned long *args)
+{
+	regs->orig_d0 = args[0];
+	args++;
+
+	memcpy(&regs->d1, args, 5 * sizeof(args[0]));
+}
+
 static inline int syscall_get_arch(struct task_struct *task)
 {
 	return AUDIT_ARCH_M68K;

arch/m68k/include/asm/thread_info.h

···
 #define TIF_NOTIFY_RESUME	5	/* callback before returning to user */
 #define TIF_SIGPENDING		6	/* signal pending */
 #define TIF_NEED_RESCHED	7	/* rescheduling necessary */
+#define TIF_SECCOMP		13	/* seccomp syscall filtering active */
 #define TIF_DELAYED_TRACE	14	/* single step a syscall */
 #define TIF_SYSCALL_TRACE	15	/* syscall trace active */
 #define TIF_MEMDIE		16	/* is terminating due to OOM killer */
···
 #define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
 #define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
+#define _TIF_SECCOMP		(1 << TIF_SECCOMP)
 #define _TIF_DELAYED_TRACE	(1 << TIF_DELAYED_TRACE)
 #define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
 #define _TIF_MEMDIE		(1 << TIF_MEMDIE)

arch/m68k/kernel/entry.S

···
 	jbsr	syscall_trace_enter
 	RESTORE_SWITCH_STACK
 	addql	#4,%sp
+	addql	#1,%d0			| optimization for cmpil #-1,%d0
+	jeq	ret_from_syscall
 	movel	%sp@(PT_OFF_ORIG_D0),%d0
 	cmpl	#NR_syscalls,%d0
 	jcs	syscall
+	jra	ret_from_syscall
 badsys:
 	movel	#-ENOSYS,%sp@(PT_OFF_D0)
 	jra	ret_from_syscall
···
 	| syscall trace?
 	tstb	%a1@(TINFO_FLAGS+2)
 	jmi	do_trace_entry
+	| seccomp filter active?
+	btst	#5,%a1@(TINFO_FLAGS+2)
+	bnes	do_trace_entry
 	cmpl	#NR_syscalls,%d0
 	jcc	badsys
 syscall:

arch/m68k/kernel/ptrace.c

···
 #include <linux/signal.h>
 #include <linux/regset.h>
 #include <linux/elf.h>
-
+#include <linux/seccomp.h>
 #include <linux/uaccess.h>
 #include <asm/page.h>
 #include <asm/processor.h>
···
 
 	if (test_thread_flag(TIF_SYSCALL_TRACE))
 		ret = ptrace_report_syscall_entry(task_pt_regs(current));
+
+	if (secure_computing() == -1)
+		return -1;
+
 	return ret;
 }
 

arch/m68k/q40/q40ints.c

···
 #define DEBUG_Q40INT
 /*#define IP_USE_DISABLE *//* would be nice, but crashes ???? */
 
-static int mext_disabled=0;  /* ext irq disabled by master chip? */
-static int aliased_irq=0;  /* how many times inside handler ?*/
+static int mext_disabled;	/* ext irq disabled by master chip? */
+static int aliased_irq;		/* how many times inside handler ?*/
 
 
 /* got interrupt, dispatch to ISA or keyboard/timer IRQs */

tools/testing/selftests/seccomp/seccomp_bpf.c

···
 #  define __NR_seccomp 337
 # elif defined(__sh__)
 #  define __NR_seccomp 372
+# elif defined(__mc68000__)
+#  define __NR_seccomp 380
 # else
 #  warning "seccomp syscall number unknown for this architecture"
 #  define __NR_seccomp 0xffff
···
 # define ARCH_REGS		struct pt_regs
 # define SYSCALL_NUM(_regs)	(_regs).regs[3]
 # define SYSCALL_RET(_regs)	(_regs).regs[0]
+#elif defined(__mc68000__)
+# define ARCH_REGS		struct user_regs_struct
+# define SYSCALL_NUM(_regs)	(_regs).orig_d0
+# define SYSCALL_RET(_regs)	(_regs).d0
 #else
 # error "Do not know how to find your architecture's registers and syscalls"
 #endif
···
  * Use PTRACE_GETREGS and PTRACE_SETREGS when available. This is useful for
  * architectures without HAVE_ARCH_TRACEHOOK (e.g. User-mode Linux).
  */
-#if defined(__x86_64__) || defined(__i386__) || defined(__mips__)
+#if defined(__x86_64__) || defined(__i386__) || defined(__mips__) || defined(__mc68000__)
 # define ARCH_GETREGS(_regs)	ptrace(PTRACE_GETREGS, tracee, 0, &(_regs))
 # define ARCH_SETREGS(_regs)	ptrace(PTRACE_SETREGS, tracee, 0, &(_regs))
 #else