[Part2 PATCH v9 36/38] KVM: SVM: Clear C-bit from the page fault address

[Brijesh Singh]

When SEV is active, on #VMEXIT the  page fault address will contain the
C-bit. We must clear the C-bit before handling the fault.

Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Paolo Bonzini <pbonz...@redhat.com>
Cc: "Radim Krčmář" <rkrc...@redhat.com>
Cc: Joerg Roedel <j...@8bytes.org>
Cc: Borislav Petkov <b...@suse.de>
Cc: Tom Lendacky <thomas.lenda...@amd.com>
Cc: x...@kernel.org
Cc: k...@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Borislav Petkov <b...@suse.de>
Signed-off-by: Brijesh Singh <brijesh.si...@amd.com>
---
 arch/x86/kvm/svm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index bdce5b4e71cc..f350e9bac9eb 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -2430,7 +2430,7 @@ static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned 
long value)
 
 static int pf_interception(struct vcpu_svm *svm)
 {
-       u64 fault_address = svm->vmcb->control.exit_info_2;
+       u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
        u64 error_code = svm->vmcb->control.exit_info_1;
 
        return kvm_handle_page_fault(&svm->vcpu, error_code, fault_address,
@@ -2440,7 +2440,7 @@ static int pf_interception(struct vcpu_svm *svm)
 
 static int npf_interception(struct vcpu_svm *svm)
 {
-       u64 fault_address = svm->vmcb->control.exit_info_2;
+       u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
        u64 error_code = svm->vmcb->control.exit_info_1;
 
        trace_kvm_page_fault(fault_address, error_code);
-- 
2.9.5