Patches are based on kvm/next with [1] applied Testing Secure TSC ------------------ Secure TSC guest patches are available as part of v6.14. QEMU changes: https://github.com/AMDESE/qemu/tree/snp-securetsc-latest QEMU command line SEV-SNP with Secure TSC: qemu-system-x86_64 -cpu EPYC-Milan-v2 -smp 4 \ -object memory-backend-memfd,id=ram1,size=1G,share=true,prealloc=false,reserve=false \ -object sev-snp-guest,id=sev0,cbitpos=51,reduced-phys-bits=1,secure-tsc=on,stsc-freq=2000000000 \ -machine q35,confidential-guest-support=sev0,memory-backend=ram1 \ ... Changelog: ---------- v10: * Rebased on kvm/next * Collect RB from Kai Huang v9: https://lore.kernel.org/kvm/20250716060836.2231613-1-nikunj@xxxxxxx/ * Set guest_tsc_protected during guest vCPU creation (Kai Huang) * Improve error handling (Kai Huang) * Disable MSR_AMD64_GUEST_TSC_FREQ write interception (Sean) 1. https://lore.kernel.org/kvm/20250804090945.267199-1-nikunj@xxxxxxx/ Nikunj A Dadhania (2): x86/cpufeatures: Add SNP Secure TSC KVM: SVM: Enable Secure TSC for SNP guests arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/include/asm/svm.h | 1 + arch/x86/kvm/svm/sev.c | 27 +++++++++++++++++++++++++++ arch/x86/kvm/svm/svm.c | 2 ++ arch/x86/kvm/svm/svm.h | 2 ++ 5 files changed, 33 insertions(+) base-commit: 196d9e72c4b0bd68b74a4ec7f52d248f37d0f030 prerequisite-patch-id: 97788f545096df9ccc70cc99571d545fe4503f01 prerequisite-patch-id: 7a0edf8fa18231f19c781b4d412df4bafcb3d1ae -- 2.43.0
