[HVM][SVM] 64-bit Windows HVM guests require MCE/MCA CPUID bits to be present.

This SVM patch removes "masking off" of these bits for AMD-V HVM guests.
Signed-off-by: Tom Woller <thomas.woller@amd.com>=20

diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index 2036ed509069e3f8f97c9bd9b7ff08dc319cef4f..fc90ca81fb2aec85eb8820f5895deb542a8f88a3 100644 (file)
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -1076,9 +1076,6 @@ static void svm_vmexit_do_cpuid(struct vmcb_struct *vmcb, unsigned long input,
                    clear_bit(X86_FEATURE_NX & 31, &edx);
             }
             clear_bit(X86_FEATURE_PSE36, &edx);
-            /* Disable machine check architecture */
-            clear_bit(X86_FEATURE_MCA, &edx);
-            clear_bit(X86_FEATURE_MCE, &edx);
             if (input == 0x00000001 )
             {
                 /* Clear out reserved bits. */