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authorPaolo Bonzini <pbonzini@redhat.com>2013-10-02 17:54:57 +0200
committerGleb Natapov <gleb@redhat.com>2013-10-02 18:58:27 +0300
commit2560f19f426aceb4f2e809d860b93e7573cb1c4e (patch)
treefb2d96a9cf3505c44e14d3daebeaa0b77a5a252c /target-i386
parentc74f41bbcc83d12787ac42f2c74fc2be54e9f222 (diff)
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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>
Diffstat (limited to 'target-i386')
-rw-r--r--target-i386/cpu.c65
1 files changed, 48 insertions, 17 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index ea99b26..7c2584c 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -328,6 +328,15 @@ X86RegisterInfo32 x86_reg_info_32[CPU_NB_REGS32] = {
};
#undef REGISTER
+typedef struct ExtSaveArea {
+ uint32_t feature, bits;
+ uint32_t offset, size;
+} ExtSaveArea;
+
+static const ExtSaveArea ext_save_areas[] = {
+ [2] = { .feature = FEAT_1_ECX, .bits = CPUID_EXT_AVX,
+ .offset = 0x100, .size = 0x240 },
+};
const char *get_register_name_32(unsigned int reg)
{
@@ -2180,29 +2189,51 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
*edx = 0;
}
break;
- case 0xD:
+ case 0xD: {
+ KVMState *s = cs->kvm_state;
+ uint64_t kvm_mask;
+ int i;
+
/* Processor Extended State */
- if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE)) {
- *eax = 0;
- *ebx = 0;
- *ecx = 0;
- *edx = 0;
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE) || !kvm_enabled()) {
break;
}
- if (kvm_enabled()) {
- KVMState *s = cs->kvm_state;
+ kvm_mask =
+ kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EAX) |
+ ((uint64_t)kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EDX) << 32);
- *eax = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EAX);
- *ebx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EBX);
- *ecx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_ECX);
- *edx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EDX);
- } else {
- *eax = 0;
- *ebx = 0;
- *ecx = 0;
- *edx = 0;
+ if (count == 0) {
+ *ecx = 0x240;
+ for (i = 2; i < ARRAY_SIZE(ext_save_areas); i++) {
+ const ExtSaveArea *esa = &ext_save_areas[i];
+ if ((env->features[esa->feature] & esa->bits) == esa->bits &&
+ (kvm_mask & (1 << i)) != 0) {
+ if (i < 32) {
+ *eax |= 1 << i;
+ } else {
+ *edx |= 1 << (i - 32);
+ }
+ *ecx = MAX(*ecx, esa->offset + esa->size);
+ }
+ }
+ *eax |= kvm_mask & (XSTATE_FP | XSTATE_SSE);
+ *ebx = *ecx;
+ } else if (count == 1) {
+ *eax = kvm_arch_get_supported_cpuid(s, 0xd, 1, R_EAX);
+ } else if (count < ARRAY_SIZE(ext_save_areas)) {
+ const ExtSaveArea *esa = &ext_save_areas[count];
+ if ((env->features[esa->feature] & esa->bits) == esa->bits &&
+ (kvm_mask & (1 << count)) != 0) {
+ *eax = esa->offset;
+ *ebx = esa->size;
+ }
}
break;
+ }
case 0x80000000:
*eax = env->cpuid_xlevel;
*ebx = env->cpuid_vendor1;