On 18.11.2024 09:49, ngoc-tu.d...@vates.tech wrote:
> --- a/xen/arch/x86/cpu-policy.c
> +++ b/xen/arch/x86/cpu-policy.c
> @@ -788,6 +788,9 @@ static void __init calculate_hvm_max_policy(void)
>
> if ( !cpu_has_vmx_xsaves )
> __clear_bit(X86_FEATURE_XSAVES, fs);
> +
> +
From: Tu Dinh
Virtual architectural LBRs work in guest mode only, using the "load
guest IA32_LBR_CTL" and "clear IA32_LBR_CTL" VMX controls.
Intercept writes to MSR_IA32_LASTBRANCH_{CTL,DEPTH} to inject LBR MSRs
into guest. MSR_IA32_LASTBRANCH_DEPTH is only allowed to be equal to
that of the hos
