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Re: [Qemu-devel] [PATCH v3 00/20] GICv3 emulation

From: Ed Maste
Subject: Re: [Qemu-devel] [PATCH v3 00/20] GICv3 emulation
Date: Thu, 23 Jun 2016 10:18:29 -0400

On 23 June 2016 at 07:36, Laszlo Ersek <address@hidden> wrote:
> On 06/22/16 22:53, Peter Maydell wrote:
>> On 22 June 2016 at 19:09, Ed Maste <address@hidden> wrote:
>>> On 15 June 2016 at 06:10, Peter Maydell <address@hidden> wrote:
>>>> A quick scan through http://fxr.watson.org/fxr/source/arm64/arm64/gic_v3.c
>>>> doesn't seem to show it setting the IGROUPR registers anywhere,
>>>> so it probably is a guest bug. (You can use "-d 'trace:gicv3*'" to
>>>> enable the tracepoints for the GIC which would let you check whether
>>>> the guest ever tries to write to the group config registers.)
>>> Is there a prebuilt QEMU_EFI.fd available somewhere for testing a
>>> FreeBSD change to address this? I've been using the prebuilt ones from
>>> https://wiki.linaro.org/LEG/UEFIforQEMU and the latest one I had did
>>> not start with gic-version=3.
>> Yeah, it looks like the same bug is also present in UEFI itself
>> (it's super popular!). Laszlo, Ard, do you have a prebuilt
>> UEFI binary with Ard's fix?
> I just put up one here, in case it's still needed:
> http://people.redhat.com/~lersek/82a5e88f-f1e1-42e2-8462-66974c9cbfff/

Thank you. I ran your QEMU_EFI.fd with gic_version=3 and UEFI and
FreeBSD start up successfully (as expected, based on the discussion in
this thread).

It sounds like we'll need to build a hacked UEFI build as Peter
Maydell suggested in order to actually test a FreeBSD fix when we have


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