tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef ARCH_X86_KVM_CPUID_H
2#define ARCH_X86_KVM_CPUID_H
3
4#include "x86.h"
5#include <asm/cpu.h>
6
7int kvm_update_cpuid(struct kvm_vcpu *vcpu);
8bool kvm_mpx_supported(void);
9struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
10 u32 function, u32 index);
11int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
12 struct kvm_cpuid_entry2 __user *entries,
13 unsigned int type);
14int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
15 struct kvm_cpuid *cpuid,
16 struct kvm_cpuid_entry __user *entries);
17int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
18 struct kvm_cpuid2 *cpuid,
19 struct kvm_cpuid_entry2 __user *entries);
20int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
21 struct kvm_cpuid2 *cpuid,
22 struct kvm_cpuid_entry2 __user *entries);
23void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx);
24
25int cpuid_query_maxphyaddr(struct kvm_vcpu *vcpu);
26
27static inline int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
28{
29 return vcpu->arch.maxphyaddr;
30}
31
32static inline bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu)
33{
34 struct kvm_cpuid_entry2 *best;
35
36 if (!static_cpu_has(X86_FEATURE_XSAVE))
37 return false;
38
39 best = kvm_find_cpuid_entry(vcpu, 1, 0);
40 return best && (best->ecx & bit(X86_FEATURE_XSAVE));
41}
42
43static inline bool guest_cpuid_has_mtrr(struct kvm_vcpu *vcpu)
44{
45 struct kvm_cpuid_entry2 *best;
46
47 best = kvm_find_cpuid_entry(vcpu, 1, 0);
48 return best && (best->edx & bit(X86_FEATURE_MTRR));
49}
50
51static inline bool guest_cpuid_has_tsc_adjust(struct kvm_vcpu *vcpu)
52{
53 struct kvm_cpuid_entry2 *best;
54
55 best = kvm_find_cpuid_entry(vcpu, 7, 0);
56 return best && (best->ebx & bit(X86_FEATURE_TSC_ADJUST));
57}
58
59static inline bool guest_cpuid_has_smep(struct kvm_vcpu *vcpu)
60{
61 struct kvm_cpuid_entry2 *best;
62
63 best = kvm_find_cpuid_entry(vcpu, 7, 0);
64 return best && (best->ebx & bit(X86_FEATURE_SMEP));
65}
66
67static inline bool guest_cpuid_has_smap(struct kvm_vcpu *vcpu)
68{
69 struct kvm_cpuid_entry2 *best;
70
71 best = kvm_find_cpuid_entry(vcpu, 7, 0);
72 return best && (best->ebx & bit(X86_FEATURE_SMAP));
73}
74
75static inline bool guest_cpuid_has_fsgsbase(struct kvm_vcpu *vcpu)
76{
77 struct kvm_cpuid_entry2 *best;
78
79 best = kvm_find_cpuid_entry(vcpu, 7, 0);
80 return best && (best->ebx & bit(X86_FEATURE_FSGSBASE));
81}
82
83static inline bool guest_cpuid_has_pku(struct kvm_vcpu *vcpu)
84{
85 struct kvm_cpuid_entry2 *best;
86
87 best = kvm_find_cpuid_entry(vcpu, 7, 0);
88 return best && (best->ecx & bit(X86_FEATURE_PKU));
89}
90
91static inline bool guest_cpuid_has_longmode(struct kvm_vcpu *vcpu)
92{
93 struct kvm_cpuid_entry2 *best;
94
95 best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
96 return best && (best->edx & bit(X86_FEATURE_LM));
97}
98
99static inline bool guest_cpuid_has_osvw(struct kvm_vcpu *vcpu)
100{
101 struct kvm_cpuid_entry2 *best;
102
103 best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
104 return best && (best->ecx & bit(X86_FEATURE_OSVW));
105}
106
107static inline bool guest_cpuid_has_pcid(struct kvm_vcpu *vcpu)
108{
109 struct kvm_cpuid_entry2 *best;
110
111 best = kvm_find_cpuid_entry(vcpu, 1, 0);
112 return best && (best->ecx & bit(X86_FEATURE_PCID));
113}
114
115static inline bool guest_cpuid_has_x2apic(struct kvm_vcpu *vcpu)
116{
117 struct kvm_cpuid_entry2 *best;
118
119 best = kvm_find_cpuid_entry(vcpu, 1, 0);
120 return best && (best->ecx & bit(X86_FEATURE_X2APIC));
121}
122
123static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu)
124{
125 struct kvm_cpuid_entry2 *best;
126
127 best = kvm_find_cpuid_entry(vcpu, 0, 0);
128 return best && best->ebx == X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx;
129}
130
131static inline bool guest_cpuid_has_gbpages(struct kvm_vcpu *vcpu)
132{
133 struct kvm_cpuid_entry2 *best;
134
135 best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
136 return best && (best->edx & bit(X86_FEATURE_GBPAGES));
137}
138
139static inline bool guest_cpuid_has_rtm(struct kvm_vcpu *vcpu)
140{
141 struct kvm_cpuid_entry2 *best;
142
143 best = kvm_find_cpuid_entry(vcpu, 7, 0);
144 return best && (best->ebx & bit(X86_FEATURE_RTM));
145}
146
147static inline bool guest_cpuid_has_rdtscp(struct kvm_vcpu *vcpu)
148{
149 struct kvm_cpuid_entry2 *best;
150
151 best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
152 return best && (best->edx & bit(X86_FEATURE_RDTSCP));
153}
154
155/*
156 * NRIPS is provided through cpuidfn 0x8000000a.edx bit 3
157 */
158#define BIT_NRIPS 3
159
160static inline bool guest_cpuid_has_nrips(struct kvm_vcpu *vcpu)
161{
162 struct kvm_cpuid_entry2 *best;
163
164 best = kvm_find_cpuid_entry(vcpu, 0x8000000a, 0);
165
166 /*
167 * NRIPS is a scattered cpuid feature, so we can't use
168 * X86_FEATURE_NRIPS here (X86_FEATURE_NRIPS would be bit
169 * position 8, not 3).
170 */
171 return best && (best->edx & bit(BIT_NRIPS));
172}
173#undef BIT_NRIPS
174
175static inline int guest_cpuid_family(struct kvm_vcpu *vcpu)
176{
177 struct kvm_cpuid_entry2 *best;
178
179 best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
180 if (!best)
181 return -1;
182
183 return x86_family(best->eax);
184}
185
186static inline int guest_cpuid_model(struct kvm_vcpu *vcpu)
187{
188 struct kvm_cpuid_entry2 *best;
189
190 best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
191 if (!best)
192 return -1;
193
194 return x86_model(best->eax);
195}
196
197static inline int guest_cpuid_stepping(struct kvm_vcpu *vcpu)
198{
199 struct kvm_cpuid_entry2 *best;
200
201 best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
202 if (!best)
203 return -1;
204
205 return x86_stepping(best->eax);
206}
207
208#endif