On 21/03/2016 11:05, Huaitong Han wrote:
> This patch disables CPUID:PKU without ept, because pkeys is not yet
> implemented for shadow paging.
>
> Signed-off-by: Huaitong Han <huaitong.han@xxxxxxxxx>
> Reviewed-by: Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx>
> ---
> arch/x86/kvm/cpuid.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
> index 7dc7a5a..5028c1e 100644
> --- a/arch/x86/kvm/cpuid.c
> +++ b/arch/x86/kvm/cpuid.c
> @@ -447,6 +447,12 @@ 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, CPUID_7_ECX);
> + if (!tdp_enabled)
> + /*
> + * PKU is not yet implemented for shadow
> + * paging.
> + */
> + entry->ecx &= ~F(PKU);
> } else {
> entry->ebx = 0;
> entry->ecx = 0;
>
I'll squash this into the previous patch.
Paolo
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