x86: cpuid: reconstruct leaf 0Dh data
The data in leaf 0Dh depends on information from other feature bits. Instead of passing it blindly from the host, compute it based on whether these feature bits are enabled. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
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@ -328,6 +328,15 @@ X86RegisterInfo32 x86_reg_info_32[CPU_NB_REGS32] = {
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};
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};
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#undef REGISTER
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#undef REGISTER
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typedef struct ExtSaveArea {
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uint32_t feature, bits;
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uint32_t offset, size;
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} ExtSaveArea;
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static const ExtSaveArea ext_save_areas[] = {
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[2] = { .feature = FEAT_1_ECX, .bits = CPUID_EXT_AVX,
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.offset = 0x100, .size = 0x240 },
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};
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const char *get_register_name_32(unsigned int reg)
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const char *get_register_name_32(unsigned int reg)
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{
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{
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@ -2180,29 +2189,51 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
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*edx = 0;
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*edx = 0;
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}
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}
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break;
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break;
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case 0xD:
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case 0xD: {
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KVMState *s = cs->kvm_state;
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uint64_t kvm_mask;
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int i;
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/* Processor Extended State */
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/* Processor Extended State */
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if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE)) {
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*eax = 0;
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*eax = 0;
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*ebx = 0;
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*ebx = 0;
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*ecx = 0;
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*ecx = 0;
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*edx = 0;
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*edx = 0;
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if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE) || !kvm_enabled()) {
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break;
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break;
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}
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}
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if (kvm_enabled()) {
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kvm_mask =
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KVMState *s = cs->kvm_state;
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kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EAX) |
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((uint64_t)kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EDX) << 32);
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*eax = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EAX);
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if (count == 0) {
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*ebx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EBX);
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*ecx = 0x240;
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*ecx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_ECX);
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for (i = 2; i < ARRAY_SIZE(ext_save_areas); i++) {
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*edx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EDX);
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const ExtSaveArea *esa = &ext_save_areas[i];
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} else {
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if ((env->features[esa->feature] & esa->bits) == esa->bits &&
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*eax = 0;
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(kvm_mask & (1 << i)) != 0) {
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*ebx = 0;
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if (i < 32) {
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*ecx = 0;
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*eax |= 1 << i;
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*edx = 0;
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} else {
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*edx |= 1 << (i - 32);
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}
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*ecx = MAX(*ecx, esa->offset + esa->size);
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}
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}
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*eax |= kvm_mask & (XSTATE_FP | XSTATE_SSE);
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*ebx = *ecx;
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} else if (count == 1) {
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*eax = kvm_arch_get_supported_cpuid(s, 0xd, 1, R_EAX);
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} else if (count < ARRAY_SIZE(ext_save_areas)) {
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const ExtSaveArea *esa = &ext_save_areas[count];
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if ((env->features[esa->feature] & esa->bits) == esa->bits &&
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(kvm_mask & (1 << count)) != 0) {
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*eax = esa->offset;
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*ebx = esa->size;
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}
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}
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}
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break;
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break;
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}
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case 0x80000000:
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case 0x80000000:
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*eax = env->cpuid_xlevel;
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*eax = env->cpuid_xlevel;
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*ebx = env->cpuid_vendor1;
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*ebx = env->cpuid_vendor1;
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