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qemu-x86: Set tsc_khz in kvm when supported

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Make use of the KVM_TSC_CONTROL feature if available.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Joerg Roedel 2011-07-07 16:13:13 +02:00 committed by Marcelo Tosatti
parent b862d1fe42
commit e7429073ed
1 changed files with 17 additions and 1 deletions
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18
target-i386/kvm.c
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@ -354,6 +354,7 @@ int kvm_arch_init_vcpu(CPUState *env)
uint32_t unused;
struct kvm_cpuid_entry2 *c;
uint32_t signature[3];
int r;
env->cpuid_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);
@ -499,7 +500,22 @@ int kvm_arch_init_vcpu(CPUState *env)
qemu_add_vm_change_state_handler(cpu_update_state, env);
return kvm_vcpu_ioctl(env, KVM_SET_CPUID2, &cpuid_data);
r = kvm_vcpu_ioctl(env, KVM_SET_CPUID2, &cpuid_data);
if (r)
return r;
#ifdef KVM_CAP_TSC_CONTROL
r = kvm_check_extension(env->kvm_state, KVM_CAP_TSC_CONTROL);
if (r && env->tsc_khz) {
r = kvm_vcpu_ioctl(env, KVM_SET_TSC_KHZ, env->tsc_khz);
if (r < 0) {
fprintf(stderr, "KVM_SET_TSC_KHZ failed\n");
return r;
}
}
#endif
return 0;
}
void kvm_arch_reset_vcpu(CPUState *env)