From: Zheyun Shen <szy0...@sjtu.edu.cn>
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 <sea...@google.com>
Signed-off-by: Zheyun Shen <szy0...@sjtu.edu.cn>
Reviewed-by: Tom Lendacky <thomas.lenda...@amd.com>
Signed-off-by: Sean Christopherson <sea...@google.com>
---
arch/x86/kvm/svm/sev.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 978a0088a3f1..e9fd3bcec37a 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2883,12 +2883,6 @@ 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
--
2.49.0.1112.g889b7c5bd8-goog
