Linux kernel mirror (for testing)
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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 <linux/stringify.h>
12#include <linux/types.h>
13#include <asm/sysreg.h>
14
15
16#define ARM64_CORE_REG(x) (KVM_REG_ARM64 | KVM_REG_SIZE_U64 | \
17 KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(x))
18
19/*
20 * KVM_ARM64_SYS_REG(sys_reg_id): Helper macro to convert
21 * SYS_* register definitions in asm/sysreg.h to use in KVM
22 * calls such as get_reg() and set_reg().
23 */
24#define KVM_ARM64_SYS_REG(sys_reg_id) \
25 ARM64_SYS_REG(sys_reg_Op0(sys_reg_id), \
26 sys_reg_Op1(sys_reg_id), \
27 sys_reg_CRn(sys_reg_id), \
28 sys_reg_CRm(sys_reg_id), \
29 sys_reg_Op2(sys_reg_id))
30
31/*
32 * Default MAIR
33 * index attribute
34 * DEVICE_nGnRnE 0 0000:0000
35 * DEVICE_nGnRE 1 0000:0100
36 * DEVICE_GRE 2 0000:1100
37 * NORMAL_NC 3 0100:0100
38 * NORMAL 4 1111:1111
39 * NORMAL_WT 5 1011:1011
40 */
41#define DEFAULT_MAIR_EL1 ((0x00ul << (0 * 8)) | \
42 (0x04ul << (1 * 8)) | \
43 (0x0cul << (2 * 8)) | \
44 (0x44ul << (3 * 8)) | \
45 (0xfful << (4 * 8)) | \
46 (0xbbul << (5 * 8)))
47
48#define MPIDR_HWID_BITMASK (0xff00fffffful)
49
50static inline void get_reg(struct kvm_vm *vm, uint32_t vcpuid, uint64_t id, uint64_t *addr)
51{
52 struct kvm_one_reg reg;
53 reg.id = id;
54 reg.addr = (uint64_t)addr;
55 vcpu_ioctl(vm, vcpuid, KVM_GET_ONE_REG, ®);
56}
57
58static inline void set_reg(struct kvm_vm *vm, uint32_t vcpuid, uint64_t id, uint64_t val)
59{
60 struct kvm_one_reg reg;
61 reg.id = id;
62 reg.addr = (uint64_t)&val;
63 vcpu_ioctl(vm, vcpuid, KVM_SET_ONE_REG, ®);
64}
65
66void aarch64_vcpu_setup(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_vcpu_init *init);
67void aarch64_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid,
68 struct kvm_vcpu_init *init, void *guest_code);
69
70struct ex_regs {
71 u64 regs[31];
72 u64 sp;
73 u64 pc;
74 u64 pstate;
75};
76
77#define VECTOR_NUM 16
78
79enum {
80 VECTOR_SYNC_CURRENT_SP0,
81 VECTOR_IRQ_CURRENT_SP0,
82 VECTOR_FIQ_CURRENT_SP0,
83 VECTOR_ERROR_CURRENT_SP0,
84
85 VECTOR_SYNC_CURRENT,
86 VECTOR_IRQ_CURRENT,
87 VECTOR_FIQ_CURRENT,
88 VECTOR_ERROR_CURRENT,
89
90 VECTOR_SYNC_LOWER_64,
91 VECTOR_IRQ_LOWER_64,
92 VECTOR_FIQ_LOWER_64,
93 VECTOR_ERROR_LOWER_64,
94
95 VECTOR_SYNC_LOWER_32,
96 VECTOR_IRQ_LOWER_32,
97 VECTOR_FIQ_LOWER_32,
98 VECTOR_ERROR_LOWER_32,
99};
100
101#define VECTOR_IS_SYNC(v) ((v) == VECTOR_SYNC_CURRENT_SP0 || \
102 (v) == VECTOR_SYNC_CURRENT || \
103 (v) == VECTOR_SYNC_LOWER_64 || \
104 (v) == VECTOR_SYNC_LOWER_32)
105
106#define ESR_EC_NUM 64
107#define ESR_EC_SHIFT 26
108#define ESR_EC_MASK (ESR_EC_NUM - 1)
109
110#define ESR_EC_SVC64 0x15
111#define ESR_EC_HW_BP_CURRENT 0x31
112#define ESR_EC_SSTEP_CURRENT 0x33
113#define ESR_EC_WP_CURRENT 0x35
114#define ESR_EC_BRK_INS 0x3c
115
116void aarch64_get_supported_page_sizes(uint32_t ipa,
117 bool *ps4k, bool *ps16k, bool *ps64k);
118
119void vm_init_descriptor_tables(struct kvm_vm *vm);
120void vcpu_init_descriptor_tables(struct kvm_vm *vm, uint32_t vcpuid);
121
122typedef void(*handler_fn)(struct ex_regs *);
123void vm_install_exception_handler(struct kvm_vm *vm,
124 int vector, handler_fn handler);
125void vm_install_sync_handler(struct kvm_vm *vm,
126 int vector, int ec, handler_fn handler);
127
128static inline void cpu_relax(void)
129{
130 asm volatile("yield" ::: "memory");
131}
132
133#define isb() asm volatile("isb" : : : "memory")
134#define dsb(opt) asm volatile("dsb " #opt : : : "memory")
135#define dmb(opt) asm volatile("dmb " #opt : : : "memory")
136
137#define dma_wmb() dmb(oshst)
138#define __iowmb() dma_wmb()
139
140#define dma_rmb() dmb(oshld)
141
142#define __iormb(v) \
143({ \
144 unsigned long tmp; \
145 \
146 dma_rmb(); \
147 \
148 /* \
149 * Courtesy of arch/arm64/include/asm/io.h: \
150 * Create a dummy control dependency from the IO read to any \
151 * later instructions. This ensures that a subsequent call \
152 * to udelay() will be ordered due to the ISB in __delay(). \
153 */ \
154 asm volatile("eor %0, %1, %1\n" \
155 "cbnz %0, ." \
156 : "=r" (tmp) : "r" ((unsigned long)(v)) \
157 : "memory"); \
158})
159
160static __always_inline void __raw_writel(u32 val, volatile void *addr)
161{
162 asm volatile("str %w0, [%1]" : : "rZ" (val), "r" (addr));
163}
164
165static __always_inline u32 __raw_readl(const volatile void *addr)
166{
167 u32 val;
168 asm volatile("ldr %w0, [%1]" : "=r" (val) : "r" (addr));
169 return val;
170}
171
172#define writel_relaxed(v,c) ((void)__raw_writel((__force u32)cpu_to_le32(v),(c)))
173#define readl_relaxed(c) ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; })
174
175#define writel(v,c) ({ __iowmb(); writel_relaxed((v),(c));})
176#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(__v); __v; })
177
178static inline void local_irq_enable(void)
179{
180 asm volatile("msr daifclr, #3" : : : "memory");
181}
182
183static inline void local_irq_disable(void)
184{
185 asm volatile("msr daifset, #3" : : : "memory");
186}
187
188/**
189 * struct arm_smccc_res - Result from SMC/HVC call
190 * @a0-a3 result values from registers 0 to 3
191 */
192struct arm_smccc_res {
193 unsigned long a0;
194 unsigned long a1;
195 unsigned long a2;
196 unsigned long a3;
197};
198
199/**
200 * smccc_hvc - Invoke a SMCCC function using the hvc conduit
201 * @function_id: the SMCCC function to be called
202 * @arg0-arg6: SMCCC function arguments, corresponding to registers x1-x7
203 * @res: pointer to write the return values from registers x0-x3
204 *
205 */
206void smccc_hvc(uint32_t function_id, uint64_t arg0, uint64_t arg1,
207 uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5,
208 uint64_t arg6, struct arm_smccc_res *res);
209
210#endif /* SELFTEST_KVM_PROCESSOR_H */