Re: [Xen-devel] [PATCH] x86/xen: Make sure X2APIC_ENABLE bit of MSR_IA32_APICBASE is not set
From: David Vrabel
Date: Thu Feb 19 2015 - 09:15:04 EST
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.
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