Re: [PATCH 3/3] qemu-x86: Set tsc_khz in kvm when supported

Jan Kiszka
2011-07-19T17:03:42Z

On 2011-07-19 13:48, Marcelo Tosatti wrote:
> On Thu, Jul 07, 2011 at 04:13:13PM +0200, Joerg Roedel wrote:
>> Make use of the KVM_TSC_CONTROL feature if available.
>>
>> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
>> ---
>> target-i386/kvm.c | 18 +++++++++++++++++-
>> 1 files changed, 17 insertions(+), 1 deletions(-)
>>
>> diff --git a/target-i386/kvm.c b/target-i386/kvm.c
>> index 10fb2c4..923d2d5 100644
>> --- a/target-i386/kvm.c
>> +++ b/target-i386/kvm.c
>> @@ -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
>

#ifdef times are over, please clean up before pushing upstream.

Jan

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