Re: [PATCH 9/9] KVM: SVM: Add CET features to supported_xss

[Maxim Levitsky]

On Tue, 2023-10-10 at 20:02 +0000, John Allen wrote:
> If the CPU supports CET, add CET XSAVES feature bits to the
> supported_xss mask.
> 
> Signed-off-by: John Allen <john.allen@xxxxxxx>
> ---
>  arch/x86/kvm/svm/svm.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
> index 00a8cef3cbb8..f63b2bbac542 100644
> --- a/arch/x86/kvm/svm/svm.c
> +++ b/arch/x86/kvm/svm/svm.c
> @@ -5151,6 +5151,10 @@ static __init void svm_set_cpu_caps(void)
>  	    boot_cpu_has(X86_FEATURE_AMD_SSBD))
>  		kvm_cpu_cap_set(X86_FEATURE_VIRT_SSBD);
>  
> +	if (kvm_cpu_cap_has(X86_FEATURE_SHSTK))
> +		kvm_caps.supported_xss |= XFEATURE_MASK_CET_USER |
> +					  XFEATURE_MASK_CET_KERNEL;
> +
>  	if (enable_pmu) {
>  		/*
>  		 * Enumerate support for PERFCTR_CORE if and only if KVM has

Reviewed-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>

Best regards,
	Maxim Levitsky