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x86/cpuid: add TCG feature bit trimming

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In KVM we trim the user provided CPUID bits to match the host CPU's
one. Introduce a similar feature to QEMU/TCG. Create a mask of TCG's
capabilities and apply it to the user bits.
This allows to let the CPU models reflect their native archetypes.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Andre Przywara 2010-03-11 14:39:03 +01:00 committed by Aurelien Jarno
parent 457dfed614
commit 551a2dec8f
1 changed files with 24 additions and 0 deletions
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24
target-i386/cpuid.c
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@ -230,6 +230,20 @@ typedef struct x86_def_t {
CPUID_PAE | CPUID_SEP | CPUID_APIC)
#define EXT2_FEATURE_MASK 0x0183F3FF
#define TCG_FEATURES (CPUID_FP87 | CPUID_PSE | CPUID_TSC | CPUID_MSR | \
CPUID_PAE | CPUID_MCE | CPUID_CX8 | CPUID_APIC | CPUID_SEP | \
CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
CPUID_PSE36 | CPUID_CLFLUSH | CPUID_ACPI | CPUID_MMX | \
CPUID_FXSR | CPUID_SSE | CPUID_SSE2 | CPUID_SS)
#define TCG_EXT_FEATURES (CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | \
CPUID_EXT_CX16 | CPUID_EXT_POPCNT | CPUID_EXT_XSAVE | \
CPUID_EXT_HYPERVISOR)
#define TCG_EXT2_FEATURES ((TCG_FEATURES & EXT2_FEATURE_MASK) | \
CPUID_EXT2_NX | CPUID_EXT2_MMXEXT | CPUID_EXT2_RDTSCP | \
CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT)
#define TCG_EXT3_FEATURES (CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM | \
CPUID_EXT3_CR8LEG | CPUID_EXT3_ABM | CPUID_EXT3_SSE4A)
/* maintains list of cpu model definitions
*/
static x86_def_t *x86_defs = {NULL};
@ -792,6 +806,16 @@ int cpu_x86_register (CPUX86State *env, const char *cpu_model)
env->cpuid_ext3_features = def->ext3_features;
env->cpuid_xlevel = def->xlevel;
env->cpuid_kvm_features = def->kvm_features;
if (!kvm_enabled()) {
env->cpuid_features &= TCG_FEATURES;
env->cpuid_ext_features &= TCG_EXT_FEATURES;
env->cpuid_ext2_features &= (TCG_EXT2_FEATURES
#ifdef TARGET_X86_64
| CPUID_EXT2_SYSCALL | CPUID_EXT2_LM
#endif
);
env->cpuid_ext3_features &= TCG_EXT3_FEATURES;
}
{
const char *model_id = def->model_id;
int c, len, i;