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KVM: svm: writes to MSR_K7_HWCR generates GPE in guest
authorMatthias Lange <matthias.lange@kernkonzept.com>
Thu, 26 Jun 2014 11:50:15 +0000 (13:50 +0200)
committerPaolo Bonzini <pbonzini@redhat.com>
Fri, 11 Jul 2014 07:11:59 +0000 (09:11 +0200)
commit22d48b2d2aa0b078816eaa1e15e485811a2d03fa
tree807ae664ffd82a085d085dedba9295b96e857322tree | snapshot (tar.gz zip)
parent5f7552d4a56c21a882c9854ac63c6eb73ca7d7c8commit | diff
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>
arch/x86/kvm/x86.c diff | blob | blame | history