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Subject[PATCH v3 0/2] x86/kvm: Enable MCE injection in the guest
From: Borislav Petkov <>

Hi all,

here's a rediff ontop of -rc2. No changes, only added Yazen's Tested-by.

Please queue,



here's v2, dropping patch 3 and incorporating hopefully all of Radim's


there's this mce-inject.ko module in the kernel which allows for
injecting real MCEs and thus test the MCE handling code.

It is doubly useful to be able to inject same MCEs in a guest so that
testing of the MCE handling code can happen even easier/faster. In order
to be able to do that on an AMD guest, we need to emulate some bits
and pieces like the HWCR[McStatusWrEn] bit which allows writes to the
MCi_STATUS registers without a #GP.

The below does that and with it I'm able to properly inject MCEs in said


Borislav Petkov (2):
kvm/x86: Move MSR_K7_HWCR to svm.c
x86/kvm: Implement MSR_HWCR support

arch/x86/kvm/svm.c | 20 ++++++++++++++++++++
arch/x86/kvm/x86.c | 46 +++++++++++++++++++++++++++++++---------------
2 files changed, 51 insertions(+), 15 deletions(-)


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