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

From: Shannon Zhao
Subject: Re: [Qemu-devel] [PATCH v3 00/20] GICv3 emulation
Date: Wed, 15 Jun 2016 22:02:16 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1

On 2016年06月15日 18:10, Peter Maydell wrote:
> 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.)
I'll try tomorrow. By the way, if we disable secure extension, will the
problem disappear?


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