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Re: [Qemu-devel] [PATCH 4/4] kvm: support MSI_X2APIC capability

From: Jan Kiszka
Subject: Re: [Qemu-devel] [PATCH 4/4] kvm: support MSI_X2APIC capability
Date: Sat, 7 May 2016 16:03:52 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv: Gecko/20080226 SUSE/ Thunderbird/ Mnenhy/

On 2016-05-06 22:53, Radim Krčmář wrote:
> The capability alows us to express x2APIC destinations.


Will the possibility to create >254 CPUs be indirectly coupled to this
capability, or should userland check for it explicitly then?

Will the kernel handle the case gracefully that AMD CPUs will report the
capability as well, although there is no x2APIC (at least so far) with
those CPU types, and we still inject MSI messages with that flag set
(just to double-check if the case was thought through)?


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