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192.168.1.100 / T103 / 1f884588077ad3476b9c91cbb0ee9ee0332bbb68 / . / src / kernel / linux / v4.14 / arch / x86 / kvm / cpuid.h
blob: d78a61408243f20e8369bc5acaa3562d7c34d0aa [file] [log] [blame]
rjw1f884582022-01-06 17:20:42 +0800[diff] [blame^]1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef ARCH_X86_KVM_CPUID_H
3#define ARCH_X86_KVM_CPUID_H
4
5#include "x86.h"
6#include <asm/cpu.h>
7#include <asm/processor.h>
8
9int kvm_update_cpuid(struct kvm_vcpu *vcpu);
10bool kvm_mpx_supported(void);
11struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
12 u32 function, u32 index);
13int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
14 struct kvm_cpuid_entry2 __user *entries,
15 unsigned int type);
16int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
17 struct kvm_cpuid *cpuid,
18 struct kvm_cpuid_entry __user *entries);
19int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
20 struct kvm_cpuid2 *cpuid,
21 struct kvm_cpuid_entry2 __user *entries);
22int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
23 struct kvm_cpuid2 *cpuid,
24 struct kvm_cpuid_entry2 __user *entries);
25bool kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx,
26 u32 *ecx, u32 *edx, bool check_limit);
27
28int cpuid_query_maxphyaddr(struct kvm_vcpu *vcpu);
29
30static inline int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
31{
32 return vcpu->arch.maxphyaddr;
33}
34
35struct cpuid_reg {
36 u32 function;
37 u32 index;
38 int reg;
39};
40
41static 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},
47 [CPUID_8000_0001_ECX] = {0x80000001, 0, CPUID_ECX},
48 [CPUID_7_0_EBX] = { 7, 0, CPUID_EBX},
49 [CPUID_D_1_EAX] = { 0xd, 1, CPUID_EAX},
50 [CPUID_8000_0008_EBX] = {0x80000008, 0, CPUID_EBX},
51 [CPUID_6_EAX] = { 6, 0, CPUID_EAX},
52 [CPUID_8000_000A_EDX] = {0x8000000a, 0, CPUID_EDX},
53 [CPUID_7_ECX] = { 7, 0, CPUID_ECX},
54 [CPUID_8000_0007_EBX] = {0x80000007, 0, CPUID_EBX},
55 [CPUID_7_EDX] = { 7, 0, CPUID_EDX},
56};
57
58static __always_inline struct cpuid_reg x86_feature_cpuid(unsigned x86_feature)
59{
60 unsigned x86_leaf = x86_feature / 32;
61
62 BUILD_BUG_ON(x86_leaf >= ARRAY_SIZE(reverse_cpuid));
63 BUILD_BUG_ON(reverse_cpuid[x86_leaf].function == 0);
64
65 return reverse_cpuid[x86_leaf];
66}
67
68static __always_inline int *guest_cpuid_get_register(struct kvm_vcpu *vcpu, unsigned x86_feature)
69{
70 struct kvm_cpuid_entry2 *entry;
71 const struct cpuid_reg cpuid = x86_feature_cpuid(x86_feature);
72
73 entry = kvm_find_cpuid_entry(vcpu, cpuid.function, cpuid.index);
74 if (!entry)
75 return NULL;
76
77 switch (cpuid.reg) {
78 case CPUID_EAX:
79 return &entry->eax;
80 case CPUID_EBX:
81 return &entry->ebx;
82 case CPUID_ECX:
83 return &entry->ecx;
84 case CPUID_EDX:
85 return &entry->edx;
86 default:
87 BUILD_BUG();
88 return NULL;
89 }
90}
91
92static __always_inline bool guest_cpuid_has(struct kvm_vcpu *vcpu, unsigned x86_feature)
93{
94 int *reg;
95
96 if (x86_feature == X86_FEATURE_XSAVE &&
97 !static_cpu_has(X86_FEATURE_XSAVE))
98 return false;
99
100 reg = guest_cpuid_get_register(vcpu, x86_feature);
101 if (!reg)
102 return false;
103
104 return *reg & bit(x86_feature);
105}
106
107static __always_inline void guest_cpuid_clear(struct kvm_vcpu *vcpu, unsigned x86_feature)
108{
109 int *reg;
110
111 reg = guest_cpuid_get_register(vcpu, x86_feature);
112 if (reg)
113 *reg &= ~bit(x86_feature);
114}
115
116static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu)
117{
118 struct kvm_cpuid_entry2 *best;
119
120 best = kvm_find_cpuid_entry(vcpu, 0, 0);
121 return best && best->ebx == X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx;
122}
123
124static inline int guest_cpuid_family(struct kvm_vcpu *vcpu)
125{
126 struct kvm_cpuid_entry2 *best;
127
128 best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
129 if (!best)
130 return -1;
131
132 return x86_family(best->eax);
133}
134
135static inline int guest_cpuid_model(struct kvm_vcpu *vcpu)
136{
137 struct kvm_cpuid_entry2 *best;
138
139 best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
140 if (!best)
141 return -1;
142
143 return x86_model(best->eax);
144}
145
146static inline int guest_cpuid_stepping(struct kvm_vcpu *vcpu)
147{
148 struct kvm_cpuid_entry2 *best;
149
150 best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
151 if (!best)
152 return -1;
153
154 return x86_stepping(best->eax);
155}
156
157static inline bool supports_cpuid_fault(struct kvm_vcpu *vcpu)
158{
159 return vcpu->arch.msr_platform_info & MSR_PLATFORM_INFO_CPUID_FAULT;
160}
161
162static inline bool cpuid_fault_enabled(struct kvm_vcpu *vcpu)
163{
164 return vcpu->arch.msr_misc_features_enables &
165 MSR_MISC_FEATURES_ENABLES_CPUID_FAULT;
166}
167
168#endif