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
