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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
00b27a3e AK |
2 | #ifndef ARCH_X86_KVM_CPUID_H |
3 | #define ARCH_X86_KVM_CPUID_H | |
4 | ||
5 | #include "x86.h" | |
91713faf | 6 | #include <asm/cpu.h> |
d6321d49 | 7 | #include <asm/processor.h> |
00b27a3e | 8 | |
dd598091 | 9 | int kvm_update_cpuid(struct kvm_vcpu *vcpu); |
a87036ad | 10 | bool kvm_mpx_supported(void); |
00b27a3e AK |
11 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
12 | u32 function, u32 index); | |
9c15bb1d BP |
13 | int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid, |
14 | struct kvm_cpuid_entry2 __user *entries, | |
15 | unsigned int type); | |
00b27a3e AK |
16 | int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
17 | struct kvm_cpuid *cpuid, | |
18 | struct kvm_cpuid_entry __user *entries); | |
19 | int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
20 | struct kvm_cpuid2 *cpuid, | |
21 | struct kvm_cpuid_entry2 __user *entries); | |
22 | int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, | |
23 | struct kvm_cpuid2 *cpuid, | |
24 | struct kvm_cpuid_entry2 __user *entries); | |
e911eb3b YZ |
25 | bool kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, |
26 | u32 *ecx, u32 *edx, bool check_limit); | |
00b27a3e | 27 | |
5a4f55cd EK |
28 | int cpuid_query_maxphyaddr(struct kvm_vcpu *vcpu); |
29 | ||
30 | static inline int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) | |
31 | { | |
32 | return vcpu->arch.maxphyaddr; | |
33 | } | |
00b27a3e | 34 | |
d6321d49 RK |
35 | struct cpuid_reg { |
36 | u32 function; | |
37 | u32 index; | |
38 | int reg; | |
39 | }; | |
00b27a3e | 40 | |
d6321d49 RK |
41 | static const struct cpuid_reg reverse_cpuid[] = { |
42 | [CPUID_1_EDX] = { 1, 0, CPUID_EDX}, | |
43 | [CPUID_8000_0001_EDX] = {0x80000001, 0, CPUID_EDX}, | |
44 | [CPUID_8086_0001_EDX] = {0x80860001, 0, CPUID_EDX}, | |
45 | [CPUID_1_ECX] = { 1, 0, CPUID_ECX}, | |
46 | [CPUID_C000_0001_EDX] = {0xc0000001, 0, CPUID_EDX}, | |
50a671d4 | 47 | [CPUID_8000_0001_ECX] = {0x80000001, 0, CPUID_ECX}, |
d6321d49 RK |
48 | [CPUID_7_0_EBX] = { 7, 0, CPUID_EBX}, |
49 | [CPUID_D_1_EAX] = { 0xd, 1, CPUID_EAX}, | |
50 | [CPUID_F_0_EDX] = { 0xf, 0, CPUID_EDX}, | |
51 | [CPUID_F_1_EDX] = { 0xf, 1, CPUID_EDX}, | |
52 | [CPUID_8000_0008_EBX] = {0x80000008, 0, CPUID_EBX}, | |
53 | [CPUID_6_EAX] = { 6, 0, CPUID_EAX}, | |
54 | [CPUID_8000_000A_EDX] = {0x8000000a, 0, CPUID_EDX}, | |
55 | [CPUID_7_ECX] = { 7, 0, CPUID_ECX}, | |
56 | [CPUID_8000_0007_EBX] = {0x80000007, 0, CPUID_EBX}, | |
57 | }; | |
00b27a3e | 58 | |
d6321d49 | 59 | static __always_inline struct cpuid_reg x86_feature_cpuid(unsigned x86_feature) |
e24dea2a | 60 | { |
d6321d49 | 61 | unsigned x86_leaf = x86_feature / 32; |
e24dea2a | 62 | |
d6321d49 RK |
63 | BUILD_BUG_ON(x86_leaf >= ARRAY_SIZE(reverse_cpuid)); |
64 | BUILD_BUG_ON(reverse_cpuid[x86_leaf].function == 0); | |
e24dea2a | 65 | |
d6321d49 | 66 | return reverse_cpuid[x86_leaf]; |
00b27a3e AK |
67 | } |
68 | ||
d6321d49 | 69 | static __always_inline int *guest_cpuid_get_register(struct kvm_vcpu *vcpu, unsigned x86_feature) |
97ec8c06 | 70 | { |
d6321d49 RK |
71 | struct kvm_cpuid_entry2 *entry; |
72 | const struct cpuid_reg cpuid = x86_feature_cpuid(x86_feature); | |
660a5d51 | 73 | |
d6321d49 RK |
74 | entry = kvm_find_cpuid_entry(vcpu, cpuid.function, cpuid.index); |
75 | if (!entry) | |
76 | return NULL; | |
2b036c6b | 77 | |
d6321d49 RK |
78 | switch (cpuid.reg) { |
79 | case CPUID_EAX: | |
80 | return &entry->eax; | |
81 | case CPUID_EBX: | |
82 | return &entry->ebx; | |
83 | case CPUID_ECX: | |
84 | return &entry->ecx; | |
85 | case CPUID_EDX: | |
86 | return &entry->edx; | |
87 | default: | |
88 | BUILD_BUG(); | |
89 | return NULL; | |
90 | } | |
2b036c6b BO |
91 | } |
92 | ||
d6321d49 | 93 | static __always_inline bool guest_cpuid_has(struct kvm_vcpu *vcpu, unsigned x86_feature) |
ad756a16 | 94 | { |
d6321d49 | 95 | int *reg; |
ad756a16 | 96 | |
d6321d49 RK |
97 | if (x86_feature == X86_FEATURE_XSAVE && |
98 | !static_cpu_has(X86_FEATURE_XSAVE)) | |
99 | return false; | |
ad756a16 | 100 | |
d6321d49 RK |
101 | reg = guest_cpuid_get_register(vcpu, x86_feature); |
102 | if (!reg) | |
103 | return false; | |
58cb628d | 104 | |
d6321d49 | 105 | return *reg & bit(x86_feature); |
58cb628d JK |
106 | } |
107 | ||
1b4d56b8 RK |
108 | static __always_inline void guest_cpuid_clear(struct kvm_vcpu *vcpu, unsigned x86_feature) |
109 | { | |
110 | int *reg; | |
111 | ||
112 | reg = guest_cpuid_get_register(vcpu, x86_feature); | |
113 | if (reg) | |
114 | *reg &= ~bit(x86_feature); | |
115 | } | |
116 | ||
a0c0feb5 PB |
117 | static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu) |
118 | { | |
119 | struct kvm_cpuid_entry2 *best; | |
120 | ||
121 | best = kvm_find_cpuid_entry(vcpu, 0, 0); | |
122 | return best && best->ebx == X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx; | |
123 | } | |
124 | ||
91713faf BP |
125 | static inline int guest_cpuid_family(struct kvm_vcpu *vcpu) |
126 | { | |
127 | struct kvm_cpuid_entry2 *best; | |
128 | ||
129 | best = kvm_find_cpuid_entry(vcpu, 0x1, 0); | |
130 | if (!best) | |
131 | return -1; | |
132 | ||
133 | return x86_family(best->eax); | |
134 | } | |
135 | ||
136 | static inline int guest_cpuid_model(struct kvm_vcpu *vcpu) | |
137 | { | |
138 | struct kvm_cpuid_entry2 *best; | |
139 | ||
140 | best = kvm_find_cpuid_entry(vcpu, 0x1, 0); | |
141 | if (!best) | |
142 | return -1; | |
143 | ||
144 | return x86_model(best->eax); | |
145 | } | |
146 | ||
147 | static inline int guest_cpuid_stepping(struct kvm_vcpu *vcpu) | |
148 | { | |
149 | struct kvm_cpuid_entry2 *best; | |
150 | ||
151 | best = kvm_find_cpuid_entry(vcpu, 0x1, 0); | |
152 | if (!best) | |
153 | return -1; | |
154 | ||
155 | return x86_stepping(best->eax); | |
156 | } | |
157 | ||
db2336a8 KH |
158 | static inline bool supports_cpuid_fault(struct kvm_vcpu *vcpu) |
159 | { | |
160 | return vcpu->arch.msr_platform_info & MSR_PLATFORM_INFO_CPUID_FAULT; | |
161 | } | |
162 | ||
163 | static inline bool cpuid_fault_enabled(struct kvm_vcpu *vcpu) | |
164 | { | |
165 | return vcpu->arch.msr_misc_features_enables & | |
166 | MSR_MISC_FEATURES_ENABLES_CPUID_FAULT; | |
167 | } | |
168 | ||
00b27a3e | 169 | #endif |