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From: David Vrabel <david.vrabel@citrix.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	<david.vrabel@citrix.com>, <konrad.wilk@oracle.com>
Cc: <xen-devel@lists.xenproject.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [Xen-devel] [PATCH] x86/xen: Make sure X2APIC_ENABLE bit of MSR_IA32_APICBASE is not set
Date: Thu, 19 Feb 2015 14:14:40 +0000	[thread overview]
Message-ID: <54E5EFD0.1090100@citrix.com> (raw)
In-Reply-To: <1423683558-25450-1-git-send-email-boris.ostrovsky@oracle.com>

On 11/02/15 19:39, Boris Ostrovsky wrote:
> Commit d524165cb8db ("x86/apic: Check x2apic early") tests X2APIC_ENABLE
> bit of MSR_IA32_APICBASE when CONFIG_X86_X2APIC is off and panics
> the kernel when this bit is set.
> 
> Xen's PV guests will pass this MSR read to the hypervisor which will
> return its version of the MSR, where this bit might be set. Make sure
> we clear it before returning MSR value to the caller.

Applied to stable/for-linus-3.20, thanks.

David

      parent reply	other threads:[~2015-02-19 14:14 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-11 19:39 [PATCH] x86/xen: Make sure X2APIC_ENABLE bit of MSR_IA32_APICBASE is not set Boris Ostrovsky
2015-02-19 14:14 ` David Vrabel
2015-02-19 14:14 ` David Vrabel [this message]

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