linux-kernel - [PATCH 0/3] x86/kvm: Enable MCE injection in the guest

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Message-Id: <20180622095101.32587-1-bp@alien8.de>
Date:   Fri, 22 Jun 2018 11:50:58 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     KVM <kvm@...r.kernel.org>
Cc:     Joerg Roedel <joro@...tes.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Tony Luck <tony.luck@...el.com>,
        Yazen Ghannam <Yazen.Ghannam@....com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/3] x86/kvm: Enable MCE injection in the guest

From: Borislav Petkov <bp@...e.de>

Hi all,

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
guest.

Thx.

Borislav Petkov (3):
  kvm/x86: Move MSR_K7_HWCR to svm.c
  x86/kvm: Implement MSR_HWCR support
  x86/kvm: Handle all MCA banks

 arch/x86/kvm/svm.c | 20 ++++++++++++++++++
 arch/x86/kvm/x86.c | 51 ++++++++++++++++++++++++++++++----------------
 2 files changed, 54 insertions(+), 17 deletions(-)

-- 
2.17.0.582.gccdcbd54c