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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2020-12-10 11:10:04 -0600 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-12-15 05:20:57 -0500 |
| commit | 85ca8be938c0e693b5ed5392279d5ecedf42901e (patch) | |
| tree | 0a307368568ed1860f6ed91bdef80ccb1793ce25 /arch/x86/kvm/svm/svm.c | |
| parent | 4444dfe4050b79964d7bb9b86a99e2bb21a972b0 (diff) | |
| download | lwn-85ca8be938c0e693b5ed5392279d5ecedf42901e.tar.gz lwn-85ca8be938c0e693b5ed5392279d5ecedf42901e.zip | |
KVM: SVM: Set the encryption mask for the SVM host save area
The SVM host save area is used to restore some host state on VMEXIT of an
SEV-ES guest. After allocating the save area, clear it and add the
encryption mask to the SVM host save area physical address that is
programmed into the VM_HSAVE_PA MSR.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <b77aa28af6d7f1a0cb545959e08d6dc75e0c3cba.1607620209.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 2e43f79c2703..4be7d13d4462 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -497,7 +497,7 @@ static int svm_hardware_enable(void) wrmsrl(MSR_EFER, efer | EFER_SVME); - wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT); + wrmsrl(MSR_VM_HSAVE_PA, __sme_page_pa(sd->save_area)); if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) { wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT); @@ -565,6 +565,7 @@ static int svm_cpu_init(int cpu) sd->save_area = alloc_page(GFP_KERNEL); if (!sd->save_area) goto free_cpu_data; + clear_page(page_address(sd->save_area)); if (svm_sev_enabled()) { sd->sev_vmcbs = kmalloc_array(max_sev_asid + 1, |