Re: [PATCH RFC v7 52/64] KVM: SVM: Provide support for SNP_GUEST_REQUEST NAE event

[Kalra, Ashish]

On 1/19/2023 2:35 PM, Dionna Amalie Glaze wrote:
> > +
> > +static void snp_handle_guest_request(struct vcpu_svm *svm, gpa_t req_gpa, gpa_t resp_gpa)
> > +{
>
> Both regular,
>
> > +
> > +static void snp_handle_ext_guest_request(struct vcpu_svm *svm, gpa_t req_gpa, gpa_t resp_gpa)
> > +{
>
> and extended guest requests should be subject to rate limiting, since
> they take a lock on the shared resource that is the AMD-SP (psp?). I
> proposed a mechanism with empirically chosen defaults in
>
> [PATCH v2 0/2] kvm: sev: Add SNP guest request throttling
> [PATCH v2 1/2] kvm: sev: Add SEV-SNP guest request throttling
> [PATCH v2 2/2] kvm: sev: If ccp is busy, report throttled to guest
>
> http://129.79.113.48/hypermail/linux/kernel/2211.2/03107.html
> http://129.79.113.48/hypermail/linux/kernel/2211.2/03110.html
> http://129.79.113.48/hypermail/linux/kernel/2211.2/03111.html
>
> But I don't see these on lore. Would you like me to repost these?

Yes, please.

Thanks,
Ashish