kvm: Add CPUID support for VIA CPU
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>
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index faedc6c..1ae2d61 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -482,6 +482,21 @@
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
