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Re: [Qemu-devel] [libvirt] [RFC PATCH 0/2] ARM: add QMP command to query
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] [libvirt] [RFC PATCH 0/2] ARM: add QMP command to query GIC version |
Date: |
Mon, 15 Feb 2016 09:41:57 +0000 |
On 15 February 2016 at 09:35, Martin Kletzander <address@hidden> wrote:
> So hardware itself supports some GIC version, let's say 3 for our case.
> Does that mean it can be triggered to do v2 as well? I mean is it
> possible that HW supports multiple versions? If yes, then I suspect
> there is (will be) HW that does *not* do it
Hardware may be:
GICv2 only
GICv3 only
GICv3 with v2 backwards-compatibility support
> and that's where QEMU (or
> KVM) must emulate that version.
If the hardware doesn't support the version that we are trying
to provide to the guest then we can't run KVM at all. (KVM
with an emulated interrupt controller is not a supported setup,
because you wouldn't get CPU timer interrupts in the guest.)
thanks
-- PMM
- [Qemu-devel] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Peter Xu, 2016/02/14
- [Qemu-devel] [RFC PATCH 1/2] arm: gic: add GICType, Peter Xu, 2016/02/14
- [Qemu-devel] [RFC PATCH 2/2] arm: gic: add "query-gic-capability" interface, Peter Xu, 2016/02/14
- Re: [Qemu-devel] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Wei Huang, 2016/02/15
- Re: [Qemu-devel] [libvirt] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Martin Kletzander, 2016/02/15
- Re: [Qemu-devel] [libvirt] [RFC PATCH 0/2] ARM: add QMP command to query GIC version,
Peter Maydell <=
- Re: [Qemu-devel] [libvirt] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Peter Xu, 2016/02/15
- Re: [Qemu-devel] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Markus Armbruster, 2016/02/15
- Re: [Qemu-devel] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Peter Xu, 2016/02/15
- Re: [Qemu-devel] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Markus Armbruster, 2016/02/15
- Re: [Qemu-devel] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Peter Maydell, 2016/02/15
- Re: [Qemu-devel] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Markus Armbruster, 2016/02/15
- Re: [Qemu-devel] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Andrew Jones, 2016/02/15
- Re: [Qemu-devel] [RFC PATCH 0/2] ARM: add QMP command to query GIC version, Peter Maydell, 2016/02/15