| Message ID | 20250120120503.470533-3-szy0127@sjtu.edu.cn (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | KVM: SVM: Flush cache only on CPUs running SEV guest | expand |
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 943bd074a..1ce67de9d 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2899,12 +2899,6 @@ void sev_vm_destroy(struct kvm *kvm) return; } - /* - * Ensure that all guest tagged cache entries are flushed before - * releasing the pages back to the system for use. CLFLUSH will - * not do this, so issue a WBINVD. - */ - wbinvd_on_all_cpus(); /* * if userspace was terminated before unregistering the memory regions
Before sev_vm_destroy() is called, kvm_arch_guest_memory_reclaimed() has been called for SEV and SEV-ES and kvm_arch_gmem_invalidate() has been called for SEV-SNP. These functions have already handled flushing the memory. Therefore, this wbinvd_on_all_cpus() can simply be dropped. Suggested-by: Sean Christopherson <seanjc@google.com> Suggested-by: Kevin Loughlin <kevinloughlin@google.com> Signed-off-by: Zheyun Shen <szy0127@sjtu.edu.cn> --- arch/x86/kvm/svm/sev.c | 6 ------ 1 file changed, 6 deletions(-)