arch/x86/kvm/cpuid.h

   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
   7 int kvm_update_cpuid(struct kvm_vcpu *vcpu);
   8 bool kvm_mpx_supported(void);
   9 struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
  10                                               u32 function, u32 index);
  11 int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
  12                             struct kvm_cpuid_entry2 __user *entries,
  13                             unsigned int type);
  14 int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
  15                              struct kvm_cpuid *cpuid,
  16                              struct kvm_cpuid_entry __user *entries);
  17 int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
  18                               struct kvm_cpuid2 *cpuid,
  19                               struct kvm_cpuid_entry2 __user *entries);
  20 int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
  21                               struct kvm_cpuid2 *cpuid,
  22                               struct kvm_cpuid_entry2 __user *entries);
  23 void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx);
  24
  25 int cpuid_query_maxphyaddr(struct kvm_vcpu *vcpu);
  26
  27 static inline int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
  28 {
  29         return vcpu->arch.maxphyaddr;
  30 }
  31
  32 static 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
  43 static 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
  51 static 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
  59 static 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
  67 static 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
  75 static 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
  83 static 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
  91 static 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
  99 static 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
 107 static 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
 115 static 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
 123 static 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
 131 static 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
 139 static 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
 147 static inline bool guest_cpuid_has_mpx(struct kvm_vcpu *vcpu)
 148 {
 149         struct kvm_cpuid_entry2 *best;
 150
 151         best = kvm_find_cpuid_entry(vcpu, 7, 0);
 152         return best && (best->ebx & bit(X86_FEATURE_MPX));
 153 }
 154
 155 static inline bool guest_cpuid_has_rdtscp(struct kvm_vcpu *vcpu)
 156 {
 157         struct kvm_cpuid_entry2 *best;
 158
 159         best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
 160         return best && (best->edx & bit(X86_FEATURE_RDTSCP));
 161 }
 162
 163 static inline bool guest_cpuid_has_ibpb(struct kvm_vcpu *vcpu)
 164 {
 165         struct kvm_cpuid_entry2 *best;
 166
 167         best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
 168         if (best && (best->ebx & bit(X86_FEATURE_AMD_IBPB)))
 169                 return true;
 170         best = kvm_find_cpuid_entry(vcpu, 7, 0);
 171         return best && (best->edx & bit(X86_FEATURE_SPEC_CTRL));
 172 }
 173
 174 static inline bool guest_cpuid_has_spec_ctrl(struct kvm_vcpu *vcpu)
 175 {
 176         struct kvm_cpuid_entry2 *best;
 177
 178         best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
 179         if (best && (best->ebx & (bit(X86_FEATURE_AMD_IBRS | bit(X86_FEATURE_AMD_SSBD)))))
 180                 return true;
 181         best = kvm_find_cpuid_entry(vcpu, 7, 0);
 182         return best && (best->edx & (bit(X86_FEATURE_SPEC_CTRL) | bit(X86_FEATURE_SPEC_CTRL_SSBD)));
 183 }
 184
 185 static inline bool guest_cpuid_has_arch_capabilities(struct kvm_vcpu *vcpu)
 186 {
 187         struct kvm_cpuid_entry2 *best;
 188
 189         best = kvm_find_cpuid_entry(vcpu, 7, 0);
 190         return best && (best->edx & bit(X86_FEATURE_ARCH_CAPABILITIES));
 191 }
 192
 193 static inline bool guest_cpuid_has_virt_ssbd(struct kvm_vcpu *vcpu)
 194 {
 195         struct kvm_cpuid_entry2 *best;
 196
 197         best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
 198         return best && (best->ebx & bit(X86_FEATURE_VIRT_SSBD));
 199 }
 200
 201
 202
 203 /*
 204  * NRIPS is provided through cpuidfn 0x8000000a.edx bit 3
 205  */
 206 #define BIT_NRIPS       3
 207
 208 static inline bool guest_cpuid_has_nrips(struct kvm_vcpu *vcpu)
 209 {
 210         struct kvm_cpuid_entry2 *best;
 211
 212         best = kvm_find_cpuid_entry(vcpu, 0x8000000a, 0);
 213
 214         /*
 215          * NRIPS is a scattered cpuid feature, so we can't use
 216          * X86_FEATURE_NRIPS here (X86_FEATURE_NRIPS would be bit
 217          * position 8, not 3).
 218          */
 219         return best && (best->edx & bit(BIT_NRIPS));
 220 }
 221 #undef BIT_NRIPS
 222
 223 static inline int guest_cpuid_family(struct kvm_vcpu *vcpu)
 224 {
 225         struct kvm_cpuid_entry2 *best;
 226
 227         best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
 228         if (!best)
 229                 return -1;
 230
 231         return x86_family(best->eax);
 232 }
 233
 234 static inline int guest_cpuid_model(struct kvm_vcpu *vcpu)
 235 {
 236         struct kvm_cpuid_entry2 *best;
 237
 238         best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
 239         if (!best)
 240                 return -1;
 241
 242         return x86_model(best->eax);
 243 }
 244
 245 static inline int guest_cpuid_stepping(struct kvm_vcpu *vcpu)
 246 {
 247         struct kvm_cpuid_entry2 *best;
 248
 249         best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
 250         if (!best)
 251                 return -1;
 252
 253         return x86_stepping(best->eax);
 254 }
 255
 256 #endif