KVM: Ignore PCI ECS I/O enablement
Linux guests will try to enable access to the extended PCI config space
via the I/O ports 0xCF8/0xCFC on AMD Fam10h CPU. Since we (currently?)
don't use ECS, simply ignore write and read attempts.
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 96f0ae7..af40e23 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -844,6 +844,8 @@
return 1;
}
break;
+ case MSR_AMD64_NB_CFG:
+ break;
case MSR_IA32_DEBUGCTLMSR:
if (!data) {
/* We support the non-activated case already */
@@ -1049,6 +1051,7 @@
case MSR_P6_EVNTSEL1:
case MSR_K7_EVNTSEL0:
case MSR_K8_INT_PENDING_MSG:
+ case MSR_AMD64_NB_CFG:
data = 0;
break;
case MSR_MTRRcap: