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Date: Tue, 09 Jun 2015 15:35:21 +0100
From: Marc Zyngier <marc.zyngier@arm.com>
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Subject: Re: [Qemu-devel] should KVM or userspace be the one which decides
 what MIPIDR/affinity values to assign to vcpus?
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Shlomo Pongratz <shlomo.pongratz@huawei.com>, Shlomo Pongratz <shlomopongratz@gmail.com>, Pavel Fedin <p.fedin@samsung.com>, QEMU Developers <qemu-devel@nongnu.org>, Shannon Zhao <shannon.zhao@linaro.org>, Ashok Kumar <ashoks@broadcom.com>, Igor Mammedov <imammedo@redhat.com>, "kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>

On 09/06/15 15:01, Peter Maydell wrote:
> On 9 June 2015 at 15:00, Marc Zyngier <marc.zyngier@arm.com> wrote:
>>
>> Yeah, what I had in mind was something along the lines of:
>> - kernel computes its "default MPDIR"
>> - kernel exposes a new capability "KVM_ARM_ALLOW_MPIDR_OVERRIDE" (or
>> something along those lines)
>> - userspace does the right thing.
> 
> You forgot the "???" step :-)

Indeed. I also missed the step that says "kernel is able to convert
arbitrary MPIDR to vcpu_id in an efficient manner...". GICv3 is
definitely going to require this.

	N,
-- 
Jazz is not dead. It just smells funny...