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| author | Matthias Lange <matthias.lange@kernkonzept.com> | 2014-06-26 15:50:15 +0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-07-11 11:11:59 +0400 |
| commit | 22d48b2d2aa0b078816eaa1e15e485811a2d03fa (patch) | |
| tree | 807ae664ffd82a085d085dedba9295b96e857322 /arch/x86/kvm/x86.c | |
| parent | 5f7552d4a56c21a882c9854ac63c6eb73ca7d7c8 (diff) | |
| download | linux-22d48b2d2aa0b078816eaa1e15e485811a2d03fa.tar.xz | |
KVM: svm: writes to MSR_K7_HWCR generates GPE in guest
Since commit 575203 the MCE subsystem in the Linux kernel for AMD sets bit 18
in MSR_K7_HWCR. Running such a kernel as a guest in KVM on an AMD host results
in a GPE injected into the guest because kvm_set_msr_common returns 1. This
patch fixes this by masking bit 18 from the MSR value desired by the guest.
Signed-off-by: Matthias Lange <matthias.lange@kernkonzept.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index b13f3a39ebec..7553530e3502 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2035,6 +2035,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) data &= ~(u64)0x40; /* ignore flush filter disable */ data &= ~(u64)0x100; /* ignore ignne emulation enable */ data &= ~(u64)0x8; /* ignore TLB cache disable */ + data &= ~(u64)0x40000; /* ignore Mc status write enable */ if (data != 0) { vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", data); |