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

From: Peter Maydell
Subject: Re: [Qemu-devel] [PATCH v3 00/20] GICv3 emulation
Date: Wed, 15 Jun 2016 11:10:37 +0100

On 15 June 2016 at 11:06, Peter Maydell <address@hidden> wrote:
> On 15 June 2016 at 10:20, Andrew Jones <address@hidden> wrote:
>> There may be a bug in the freebsd kernel. Maybe they need the equivalent
>> of Linux's 7c9b973061 "irqchip/gic-v3: Configure all interrupts as
>> non-secure Group-1". You could add the hack back that was in the initial
>> posting of this series to see if that "fixes" things.
> I agree it's possible this is a freebsd bug, but the hack patch
> won't help here because we're booting via EFI.

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.)

-- PMM

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