linux-kernel - Re: [PATCH 0/2] x86/kvm: Enable MCE injection in the guest v2

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Message-ID: <20180903072735.GB10249@zn.tnic>
Date:   Mon, 3 Sep 2018 09:27:35 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     KVM <kvm@...r.kernel.org>
Cc:     Joerg Roedel <joro@...tes.org>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Tony Luck <tony.luck@...el.com>,
        Yazen Ghannam <Yazen.Ghannam@....com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] x86/kvm: Enable MCE injection in the guest v2

Ping...

On Thu, Jun 28, 2018 at 07:38:06PM +0200, Borislav Petkov wrote:
> From: Borislav Petkov <bp@...e.de>
> 
> Hi all,
> 
> here's v2, dropping patch 3 and incorporating hopefully all of Radim's
> feedback.
> 
> Thx.
> 
> v1 cover letter:
> 
> 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.
> 
> 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(-)
> 
> -- 
> 2.17.0.582.gccdcbd54c
> 

-- 
Regards/Gruss,
    Boris.

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