From: Wei Liu <wei.liu@kernel.org>
To: Praveen Kumar <kumarpraveen@linux.microsoft.com>
Cc: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
kys@microsoft.com, haiyangz@microsoft.com,
sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
x86@kernel.org, hpa@zytor.com, viremana@linux.microsoft.com,
sunilmut@microsoft.com, nunodasneves@linux.microsoft.com
Subject: Re: [PATCH v3] hyperv: root partition faults writing to VP ASSIST MSR PAGE
Date: Tue, 27 Jul 2021 17:51:31 +0000 [thread overview]
Message-ID: <20210727175131.364fxm667marijdk@liuwe-devbox-debian-v2> (raw)
In-Reply-To: <20210727104044.28078-1-kumarpraveen@linux.microsoft.com>
On Tue, Jul 27, 2021 at 04:10:44PM +0530, Praveen Kumar wrote:
[...]
>
> @@ -170,9 +185,21 @@ static int hv_cpu_die(unsigned int cpu)
>
> hv_common_cpu_die(cpu);
>
> - if (hv_vp_assist_page && hv_vp_assist_page[cpu])
> + if (hv_vp_assist_page && hv_vp_assist_page[cpu]) {
> wrmsrl(HV_X64_MSR_VP_ASSIST_PAGE, 0);
>
The content of the MSR should be preserved; otherwise you hit the same
fault for root kernel.
Wei.
prev parent reply other threads:[~2021-07-27 17:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-27 10:40 [PATCH v3] hyperv: root partition faults writing to VP ASSIST MSR PAGE Praveen Kumar
2021-07-27 16:35 ` Michael Kelley
2021-07-27 16:51 ` Sunil Muthuswamy
2021-07-27 16:58 ` Praveen Kumar
2021-07-27 16:45 ` Sunil Muthuswamy
2021-07-27 17:12 ` Praveen Kumar
2021-07-27 17:23 ` Sunil Muthuswamy
2021-07-27 17:51 ` Wei Liu [this message]
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