On 10/11/2023 1:32 AM, John Allen wrote:
> If kvm supports shadow stack, pass through shadow stack MSRs to improve
> guest performance.
>
> Signed-off-by: John Allen <john.allen@xxxxxxx>
> ---
> arch/x86/kvm/svm/svm.c | 26 ++++++++++++++++++++++++++
> arch/x86/kvm/svm/svm.h | 2 +-
> 2 files changed, 27 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
> index e435e4fbadda..984e89d7a734 100644
> --- a/arch/x86/kvm/svm/svm.c
> +++ b/arch/x86/kvm/svm/svm.c
> @@ -139,6 +139,13 @@ static const struct svm_direct_access_msrs {
> { .index = X2APIC_MSR(APIC_TMICT), .always = false },
> { .index = X2APIC_MSR(APIC_TMCCT), .always = false },
> { .index = X2APIC_MSR(APIC_TDCR), .always = false },
> + { .index = MSR_IA32_U_CET, .always = false },
> + { .index = MSR_IA32_S_CET, .always = false },
> + { .index = MSR_IA32_INT_SSP_TAB, .always = false },
> + { .index = MSR_IA32_PL0_SSP, .always = false },
> + { .index = MSR_IA32_PL1_SSP, .always = false },
> + { .index = MSR_IA32_PL2_SSP, .always = false },
> + { .index = MSR_IA32_PL3_SSP, .always = false },
First three MSRs are emulated in the patch 1, any specific reason for skipping MSR_IA32_PL[0-3]_SSP ?
Regards,
Nikunj
