Re: [PATCH v5 08/19] KVM:x86: Report KVM supported CET MSRs as to-be-saved

[Paolo Bonzini]

On 8/3/23 06:27, Yang Weijiang wrote:
> Add all CET MSRs including the synthesized GUEST_SSP to report list.
> PL{0,1,2}_SSP are independent to host XSAVE management with later
> patches. MSR_IA32_U_CET and MSR_IA32_PL3_SSP are XSAVE-managed on
> host side. MSR_IA32_S_CET/MSR_IA32_INT_SSP_TAB/MSR_KVM_GUEST_SSP
> are not XSAVE-managed.

MSR_KVM_GUEST_SSP -> MSR_KVM_SSP

Also please add a comment,

/*
 * SSP can only be read via RDSSP; writing even requires
 * destructive and potentially faulting operations such as
 * SAVEPREVSSP/RSTORSSP or SETSSBSY/CLRSSBSY.  Let the host
 * use a pseudo-MSR that is just a wrapper for the GUEST_SSP
 * field of the VMCS.
 */

Paolo