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Re: [Qemu-devel] should KVM or userspace be the one which decides what M
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus? |
Date: |
Wed, 10 Jun 2015 11:54:20 +0200 |
On Tue, 09 Jun 2015 15:35:21 +0100
Marc Zyngier <address@hidden> wrote:
> On 09/06/15 15:01, Peter Maydell wrote:
> > On 9 June 2015 at 15:00, Marc Zyngier <address@hidden> 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.
x86 probably already has code that does this for APIC ID -> vcpu_id
- [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Peter Maydell, 2015/06/08
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Marc Zyngier, 2015/06/09
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Peter Maydell, 2015/06/09
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Igor Mammedov, 2015/06/09
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Marc Zyngier, 2015/06/09
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Peter Maydell, 2015/06/09
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Marc Zyngier, 2015/06/09
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Peter Maydell, 2015/06/09
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Marc Zyngier, 2015/06/09
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?,
Igor Mammedov <=
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Marc Zyngier, 2015/06/10
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Radim, 2015/06/10
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Christoffer Dall, 2015/06/25
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Peter Maydell, 2015/06/25
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Christoffer Dall, 2015/06/25
- Re: [Qemu-devel] should KVM or userspace be the one which decides what MIPIDR/affinity values to assign to vcpus?, Peter Maydell, 2015/06/25