On 16/11/2015 08:51, Huaitong Han wrote:
> This patch disables CPUID:PKU without ept.
The commit message and probably the code too should say why.
Paolo
> Signed-off-by: Huaitong Han <huaitong.han@xxxxxxxxx>
>
> diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
> index ece687b..e1113ae 100644
> --- a/arch/x86/kvm/cpuid.c
> +++ b/arch/x86/kvm/cpuid.c
> @@ -447,6 +447,8 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
> entry->ebx |= F(TSC_ADJUST);
> entry->ecx &= kvm_supported_word11_x86_features;
> cpuid_mask(&entry->ecx, 13);
> + if (!tdp_enabled)
> + entry->ecx &= ~F(PKU);
> } else {
> entry->ebx = 0;
> entry->ecx = 0;
>
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