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Re: [Qemu-devel] [PATCH 2/2] Expose tsc deadline timer cpuid to guest


From: Jan Kiszka
Subject: Re: [Qemu-devel] [PATCH 2/2] Expose tsc deadline timer cpuid to guest
Date: Fri, 20 Apr 2012 12:12:38 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666

On 2012-04-19 22:03, Eduardo Habkost wrote:
> Jan/Avi: ping?
> 
> I would like to get this ABI detail clarified so it can be implemented
> the right way on Qemu and KVM.
> 
> My proposal is to simply add tsc-deadline to the data returned by
> GET_SUPPORTED_CPUID, making KVM_CAP_TSC_DEADLINE_TIMER unnecessary.
> 

IIRC, there were problems with this model to exclude that the feature
gets reported this way without ensuring that in-kernel irqchip is
actually activated. Please browse the discussions, it should be
documented there.

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux



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