2015-09-28 13:38+0800, Haozhong Zhang:
> This patch moves the field of TSC scaling ratio from the architecture
> struct vcpu_svm to the common struct kvm_vcpu_arch.
>
> Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
> ---
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> @@ -7080,6 +7080,9 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
>
> vcpu = kvm_x86_ops->vcpu_create(kvm, id);
>
> + if (!IS_ERR(vcpu))
> + vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio;
This shouldn't be necessary, (and we can definitely do it without error
checking later)
kvm_arch_vcpu_create
(vmx|svm)_create_vcpu
kvm_vcpu_init
kvm_arch_vcpu_init
kvm_set_tsc_khz
sets vcpu->arch.tsc_scaling_ratio to something reasonable and SVM didn't
overwrite that value. (kvm_set_tsc_khz() only doesn't set the ration if
this_tsc_khz == 0, which we could extend to be extra safe.)
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