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kvm: Add CPUID support for VIA CPU

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When KVM is running on VIA CPU with host cpu's model, the
feautures of VIA CPU will be passed into kvm guest by calling
the CPUID instruction for Centaur.

Signed-off-by: BrillyWu<brillywu@viatech.com.cn>
Signed-off-by: KaryJin<karyjin@viatech.com.cn>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
brillywu@viatech.com.cn 2011-06-01 09:59:52 +08:00 • committed by Anthony Liguori
parent 6df658f55c
commit b3baa152aa
3 changed files with 74 additions and 3 deletions
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15
target-i386/kvm.c
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@ -482,6 +482,21 @@ int kvm_arch_init_vcpu(CPUState *env)
cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx);
}
/* Call Centaur's CPUID instructions they are supported. */
if (env->cpuid_xlevel2 > 0) {
env->cpuid_ext4_features &=
kvm_arch_get_supported_cpuid(env, 0xC0000001, 0, R_EDX);
cpu_x86_cpuid(env, 0xC0000000, 0, &limit, &unused, &unused, &unused);
for (i = 0xC0000000; i <= limit; i++) {
c = &cpuid_data.entries[cpuid_i++];
c->function = i;
c->flags = 0;
cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx);
}
}
cpuid_data.cpuid.nent = cpuid_i;
#ifdef KVM_CAP_MCE