Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * AArch64 processor specific defines
4 *
5 * Copyright (C) 2018, Red Hat, Inc.
6 */
7#ifndef SELFTEST_KVM_PROCESSOR_H
8#define SELFTEST_KVM_PROCESSOR_H
9
10#include "kvm_util.h"
11#include "ucall_common.h"
12
13#include <linux/stringify.h>
14#include <linux/types.h>
15#include <asm/brk-imm.h>
16#include <asm/esr.h>
17#include <asm/sysreg.h>
18
19
20#define ARM64_CORE_REG(x) (KVM_REG_ARM64 | KVM_REG_SIZE_U64 | \
21 KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(x))
22
23/*
24 * KVM_ARM64_SYS_REG(sys_reg_id): Helper macro to convert
25 * SYS_* register definitions in asm/sysreg.h to use in KVM
26 * calls such as vcpu_get_reg() and vcpu_set_reg().
27 */
28#define KVM_ARM64_SYS_REG(sys_reg_id) \
29 ARM64_SYS_REG(sys_reg_Op0(sys_reg_id), \
30 sys_reg_Op1(sys_reg_id), \
31 sys_reg_CRn(sys_reg_id), \
32 sys_reg_CRm(sys_reg_id), \
33 sys_reg_Op2(sys_reg_id))
34
35/*
36 * Default MAIR
37 * index attribute
38 * DEVICE_nGnRnE 0 0000:0000
39 * DEVICE_nGnRE 1 0000:0100
40 * DEVICE_GRE 2 0000:1100
41 * NORMAL_NC 3 0100:0100
42 * NORMAL 4 1111:1111
43 * NORMAL_WT 5 1011:1011
44 */
45
46/* Linux doesn't use these memory types, so let's define them. */
47#define MAIR_ATTR_DEVICE_GRE UL(0x0c)
48#define MAIR_ATTR_NORMAL_WT UL(0xbb)
49
50#define MT_DEVICE_nGnRnE 0
51#define MT_DEVICE_nGnRE 1
52#define MT_DEVICE_GRE 2
53#define MT_NORMAL_NC 3
54#define MT_NORMAL 4
55#define MT_NORMAL_WT 5
56
57#define DEFAULT_MAIR_EL1 \
58 (MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRnE, MT_DEVICE_nGnRnE) | \
59 MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRE, MT_DEVICE_nGnRE) | \
60 MAIR_ATTRIDX(MAIR_ATTR_DEVICE_GRE, MT_DEVICE_GRE) | \
61 MAIR_ATTRIDX(MAIR_ATTR_NORMAL_NC, MT_NORMAL_NC) | \
62 MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL) | \
63 MAIR_ATTRIDX(MAIR_ATTR_NORMAL_WT, MT_NORMAL_WT))
64
65/* TCR_EL1 specific flags */
66#define TCR_T0SZ_OFFSET 0
67#define TCR_T0SZ(x) ((UL(64) - (x)) << TCR_T0SZ_OFFSET)
68
69#define TCR_IRGN0_SHIFT 8
70#define TCR_IRGN0_MASK (UL(3) << TCR_IRGN0_SHIFT)
71#define TCR_IRGN0_NC (UL(0) << TCR_IRGN0_SHIFT)
72#define TCR_IRGN0_WBWA (UL(1) << TCR_IRGN0_SHIFT)
73#define TCR_IRGN0_WT (UL(2) << TCR_IRGN0_SHIFT)
74#define TCR_IRGN0_WBnWA (UL(3) << TCR_IRGN0_SHIFT)
75
76#define TCR_ORGN0_SHIFT 10
77#define TCR_ORGN0_MASK (UL(3) << TCR_ORGN0_SHIFT)
78#define TCR_ORGN0_NC (UL(0) << TCR_ORGN0_SHIFT)
79#define TCR_ORGN0_WBWA (UL(1) << TCR_ORGN0_SHIFT)
80#define TCR_ORGN0_WT (UL(2) << TCR_ORGN0_SHIFT)
81#define TCR_ORGN0_WBnWA (UL(3) << TCR_ORGN0_SHIFT)
82
83#define TCR_SH0_SHIFT 12
84#define TCR_SH0_MASK (UL(3) << TCR_SH0_SHIFT)
85#define TCR_SH0_INNER (UL(3) << TCR_SH0_SHIFT)
86
87#define TCR_TG0_SHIFT 14
88#define TCR_TG0_MASK (UL(3) << TCR_TG0_SHIFT)
89#define TCR_TG0_4K (UL(0) << TCR_TG0_SHIFT)
90#define TCR_TG0_64K (UL(1) << TCR_TG0_SHIFT)
91#define TCR_TG0_16K (UL(2) << TCR_TG0_SHIFT)
92
93#define TCR_IPS_SHIFT 32
94#define TCR_IPS_MASK (UL(7) << TCR_IPS_SHIFT)
95#define TCR_IPS_52_BITS (UL(6) << TCR_IPS_SHIFT)
96#define TCR_IPS_48_BITS (UL(5) << TCR_IPS_SHIFT)
97#define TCR_IPS_40_BITS (UL(2) << TCR_IPS_SHIFT)
98#define TCR_IPS_36_BITS (UL(1) << TCR_IPS_SHIFT)
99
100#define TCR_HA (UL(1) << 39)
101#define TCR_DS (UL(1) << 59)
102
103/*
104 * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers).
105 */
106#define PTE_ATTRINDX(t) ((t) << 2)
107#define PTE_ATTRINDX_MASK GENMASK(4, 2)
108#define PTE_ATTRINDX_SHIFT 2
109
110#define PTE_VALID BIT(0)
111#define PGD_TYPE_TABLE BIT(1)
112#define PUD_TYPE_TABLE BIT(1)
113#define PMD_TYPE_TABLE BIT(1)
114#define PTE_TYPE_PAGE BIT(1)
115
116#define PTE_SHARED (UL(3) << 8) /* SH[1:0], inner shareable */
117#define PTE_AF BIT(10)
118
119#define PTE_ADDR_MASK(page_shift) GENMASK(47, (page_shift))
120#define PTE_ADDR_51_48 GENMASK(15, 12)
121#define PTE_ADDR_51_48_SHIFT 12
122#define PTE_ADDR_MASK_LPA2(page_shift) GENMASK(49, (page_shift))
123#define PTE_ADDR_51_50_LPA2 GENMASK(9, 8)
124#define PTE_ADDR_51_50_LPA2_SHIFT 8
125
126void aarch64_vcpu_setup(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init);
127struct kvm_vcpu *aarch64_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id,
128 struct kvm_vcpu_init *init, void *guest_code);
129
130struct ex_regs {
131 u64 regs[31];
132 u64 sp;
133 u64 pc;
134 u64 pstate;
135};
136
137#define VECTOR_NUM 16
138
139enum {
140 VECTOR_SYNC_CURRENT_SP0,
141 VECTOR_IRQ_CURRENT_SP0,
142 VECTOR_FIQ_CURRENT_SP0,
143 VECTOR_ERROR_CURRENT_SP0,
144
145 VECTOR_SYNC_CURRENT,
146 VECTOR_IRQ_CURRENT,
147 VECTOR_FIQ_CURRENT,
148 VECTOR_ERROR_CURRENT,
149
150 VECTOR_SYNC_LOWER_64,
151 VECTOR_IRQ_LOWER_64,
152 VECTOR_FIQ_LOWER_64,
153 VECTOR_ERROR_LOWER_64,
154
155 VECTOR_SYNC_LOWER_32,
156 VECTOR_IRQ_LOWER_32,
157 VECTOR_FIQ_LOWER_32,
158 VECTOR_ERROR_LOWER_32,
159};
160
161#define VECTOR_IS_SYNC(v) ((v) == VECTOR_SYNC_CURRENT_SP0 || \
162 (v) == VECTOR_SYNC_CURRENT || \
163 (v) == VECTOR_SYNC_LOWER_64 || \
164 (v) == VECTOR_SYNC_LOWER_32)
165
166void aarch64_get_supported_page_sizes(uint32_t ipa, uint32_t *ipa4k,
167 uint32_t *ipa16k, uint32_t *ipa64k);
168
169void vm_init_descriptor_tables(struct kvm_vm *vm);
170void vcpu_init_descriptor_tables(struct kvm_vcpu *vcpu);
171
172typedef void(*handler_fn)(struct ex_regs *);
173void vm_install_exception_handler(struct kvm_vm *vm,
174 int vector, handler_fn handler);
175void vm_install_sync_handler(struct kvm_vm *vm,
176 int vector, int ec, handler_fn handler);
177
178uint64_t *virt_get_pte_hva_at_level(struct kvm_vm *vm, vm_vaddr_t gva, int level);
179uint64_t *virt_get_pte_hva(struct kvm_vm *vm, vm_vaddr_t gva);
180
181static inline void cpu_relax(void)
182{
183 asm volatile("yield" ::: "memory");
184}
185
186#define isb() asm volatile("isb" : : : "memory")
187#define dsb(opt) asm volatile("dsb " #opt : : : "memory")
188#define dmb(opt) asm volatile("dmb " #opt : : : "memory")
189
190#define dma_wmb() dmb(oshst)
191#define __iowmb() dma_wmb()
192
193#define dma_rmb() dmb(oshld)
194
195#define __iormb(v) \
196({ \
197 unsigned long tmp; \
198 \
199 dma_rmb(); \
200 \
201 /* \
202 * Courtesy of arch/arm64/include/asm/io.h: \
203 * Create a dummy control dependency from the IO read to any \
204 * later instructions. This ensures that a subsequent call \
205 * to udelay() will be ordered due to the ISB in __delay(). \
206 */ \
207 asm volatile("eor %0, %1, %1\n" \
208 "cbnz %0, ." \
209 : "=r" (tmp) : "r" ((unsigned long)(v)) \
210 : "memory"); \
211})
212
213static __always_inline void __raw_writel(u32 val, volatile void *addr)
214{
215 asm volatile("str %w0, [%1]" : : "rZ" (val), "r" (addr));
216}
217
218static __always_inline u32 __raw_readl(const volatile void *addr)
219{
220 u32 val;
221 asm volatile("ldr %w0, [%1]" : "=r" (val) : "r" (addr));
222 return val;
223}
224
225static __always_inline void __raw_writeq(u64 val, volatile void *addr)
226{
227 asm volatile("str %0, [%1]" : : "rZ" (val), "r" (addr));
228}
229
230static __always_inline u64 __raw_readq(const volatile void *addr)
231{
232 u64 val;
233 asm volatile("ldr %0, [%1]" : "=r" (val) : "r" (addr));
234 return val;
235}
236
237#define writel_relaxed(v,c) ((void)__raw_writel((__force u32)cpu_to_le32(v),(c)))
238#define readl_relaxed(c) ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; })
239#define writeq_relaxed(v,c) ((void)__raw_writeq((__force u64)cpu_to_le64(v),(c)))
240#define readq_relaxed(c) ({ u64 __r = le64_to_cpu((__force __le64)__raw_readq(c)); __r; })
241
242#define writel(v,c) ({ __iowmb(); writel_relaxed((v),(c));})
243#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(__v); __v; })
244#define writeq(v,c) ({ __iowmb(); writeq_relaxed((v),(c));})
245#define readq(c) ({ u64 __v = readq_relaxed(c); __iormb(__v); __v; })
246
247
248static inline void local_irq_enable(void)
249{
250 asm volatile("msr daifclr, #3" : : : "memory");
251}
252
253static inline void local_irq_disable(void)
254{
255 asm volatile("msr daifset, #3" : : : "memory");
256}
257
258static inline void local_serror_enable(void)
259{
260 asm volatile("msr daifclr, #4" : : : "memory");
261}
262
263static inline void local_serror_disable(void)
264{
265 asm volatile("msr daifset, #4" : : : "memory");
266}
267
268/**
269 * struct arm_smccc_res - Result from SMC/HVC call
270 * @a0-a3 result values from registers 0 to 3
271 */
272struct arm_smccc_res {
273 unsigned long a0;
274 unsigned long a1;
275 unsigned long a2;
276 unsigned long a3;
277};
278
279/**
280 * smccc_hvc - Invoke a SMCCC function using the hvc conduit
281 * @function_id: the SMCCC function to be called
282 * @arg0-arg6: SMCCC function arguments, corresponding to registers x1-x7
283 * @res: pointer to write the return values from registers x0-x3
284 *
285 */
286void smccc_hvc(uint32_t function_id, uint64_t arg0, uint64_t arg1,
287 uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5,
288 uint64_t arg6, struct arm_smccc_res *res);
289
290/**
291 * smccc_smc - Invoke a SMCCC function using the smc conduit
292 * @function_id: the SMCCC function to be called
293 * @arg0-arg6: SMCCC function arguments, corresponding to registers x1-x7
294 * @res: pointer to write the return values from registers x0-x3
295 *
296 */
297void smccc_smc(uint32_t function_id, uint64_t arg0, uint64_t arg1,
298 uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5,
299 uint64_t arg6, struct arm_smccc_res *res);
300
301/* Execute a Wait For Interrupt instruction. */
302void wfi(void);
303
304void test_wants_mte(void);
305void test_disable_default_vgic(void);
306
307bool vm_supports_el2(struct kvm_vm *vm);
308
309static inline bool test_supports_el2(void)
310{
311 struct kvm_vm *vm = vm_create(1);
312 bool supported = vm_supports_el2(vm);
313
314 kvm_vm_free(vm);
315 return supported;
316}
317
318static inline bool vcpu_has_el2(struct kvm_vcpu *vcpu)
319{
320 return vcpu->init.features[0] & BIT(KVM_ARM_VCPU_HAS_EL2);
321}
322
323#define MAPPED_EL2_SYSREG(el2, el1) \
324 case SYS_##el1: \
325 if (vcpu_has_el2(vcpu)) \
326 alias = SYS_##el2; \
327 break
328
329
330static __always_inline u64 ctxt_reg_alias(struct kvm_vcpu *vcpu, u32 encoding)
331{
332 u32 alias = encoding;
333
334 BUILD_BUG_ON(!__builtin_constant_p(encoding));
335
336 switch (encoding) {
337 MAPPED_EL2_SYSREG(SCTLR_EL2, SCTLR_EL1);
338 MAPPED_EL2_SYSREG(CPTR_EL2, CPACR_EL1);
339 MAPPED_EL2_SYSREG(TTBR0_EL2, TTBR0_EL1);
340 MAPPED_EL2_SYSREG(TTBR1_EL2, TTBR1_EL1);
341 MAPPED_EL2_SYSREG(TCR_EL2, TCR_EL1);
342 MAPPED_EL2_SYSREG(VBAR_EL2, VBAR_EL1);
343 MAPPED_EL2_SYSREG(AFSR0_EL2, AFSR0_EL1);
344 MAPPED_EL2_SYSREG(AFSR1_EL2, AFSR1_EL1);
345 MAPPED_EL2_SYSREG(ESR_EL2, ESR_EL1);
346 MAPPED_EL2_SYSREG(FAR_EL2, FAR_EL1);
347 MAPPED_EL2_SYSREG(MAIR_EL2, MAIR_EL1);
348 MAPPED_EL2_SYSREG(TCR2_EL2, TCR2_EL1);
349 MAPPED_EL2_SYSREG(PIR_EL2, PIR_EL1);
350 MAPPED_EL2_SYSREG(PIRE0_EL2, PIRE0_EL1);
351 MAPPED_EL2_SYSREG(POR_EL2, POR_EL1);
352 MAPPED_EL2_SYSREG(AMAIR_EL2, AMAIR_EL1);
353 MAPPED_EL2_SYSREG(ELR_EL2, ELR_EL1);
354 MAPPED_EL2_SYSREG(SPSR_EL2, SPSR_EL1);
355 MAPPED_EL2_SYSREG(ZCR_EL2, ZCR_EL1);
356 MAPPED_EL2_SYSREG(CONTEXTIDR_EL2, CONTEXTIDR_EL1);
357 MAPPED_EL2_SYSREG(SCTLR2_EL2, SCTLR2_EL1);
358 MAPPED_EL2_SYSREG(CNTHCTL_EL2, CNTKCTL_EL1);
359 case SYS_SP_EL1:
360 if (!vcpu_has_el2(vcpu))
361 return ARM64_CORE_REG(sp_el1);
362
363 alias = SYS_SP_EL2;
364 break;
365 default:
366 BUILD_BUG();
367 }
368
369 return KVM_ARM64_SYS_REG(alias);
370}
371
372void kvm_get_default_vcpu_target(struct kvm_vm *vm, struct kvm_vcpu_init *init);
373
374static inline unsigned int get_current_el(void)
375{
376 return (read_sysreg(CurrentEL) >> 2) & 0x3;
377}
378
379#define do_smccc(...) \
380do { \
381 if (get_current_el() == 2) \
382 smccc_smc(__VA_ARGS__); \
383 else \
384 smccc_hvc(__VA_ARGS__); \
385} while (0)
386
387#endif /* SELFTEST_KVM_PROCESSOR_H */