linux-kernel - Re: [PATCH v2 2/2] x86/hyperv: fix invalid writes to MSRs during root partition kexec

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Message-ID: <Y1rZIQnLATztxw2G@liuwe-devbox-debian-v2>
Date:   Thu, 27 Oct 2022 19:16:49 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     "Michael Kelley (LINUX)" <mikelley@...rosoft.com>
Cc:     Anirudh Rayabharam <anrayabh@...ux.microsoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        Dexuan Cui <decui@...rosoft.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "stanislav.kinsburskiy@...il.com" <stanislav.kinsburskiy@...il.com>,
        "kumarpraveen@...ux.microsoft.com" <kumarpraveen@...ux.microsoft.com>,
        "mail@...rudhrb.com" <mail@...rudhrb.com>
Subject: Re: [PATCH v2 2/2] x86/hyperv: fix invalid writes to MSRs during
 root partition kexec

On Thu, Oct 27, 2022 at 01:44:40PM +0000, Michael Kelley (LINUX) wrote:
> From: Anirudh Rayabharam <anrayabh@...ux.microsoft.com> Sent: Thursday, October 27, 2022 2:57 AM
> > 
> > hv_cleanup resets the hypercall page by setting the MSR to 0. However,
> 
> The function name is hyperv_cleanup(), not hv_cleanup().

I fixed this and applied both patches to hyperv-fixes. Thank you both.