Messages in this thread Patch in this message | | | From | Avi Kivity <> | Subject | [PATCH 14/46] KVM: fix MMIO_CONF_BASE MSR access | Date | Sun, 23 Aug 2009 14:56:13 +0300 |
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From: Andre Przywara <andre.przywara@amd.com>
Some Windows versions check whether the BIOS has setup MMI/O for config space accesses on AMD Fam10h CPUs, we say "no" by returning 0 on reads and only allow disabling of MMI/O CfgSpace setup by igoring "0" writes.
Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com> --- arch/x86/kvm/x86.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 0e74d98..95fa45c 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -844,6 +844,13 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) return 1; } break; + case MSR_FAM10H_MMIO_CONF_BASE: + if (data != 0) { + pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " + "0x%llx\n", data); + return 1; + } + break; case MSR_AMD64_NB_CFG: break; case MSR_IA32_DEBUGCTLMSR: @@ -1055,6 +1062,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) case MSR_K7_EVNTSEL0: case MSR_K8_INT_PENDING_MSG: case MSR_AMD64_NB_CFG: + case MSR_FAM10H_MMIO_CONF_BASE: data = 0; break; case MSR_MTRRcap: -- 1.6.4.1
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