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From: Alex =?utf-8?Q?Benn=C3=A9e?= <alex.bennee@linaro.org>
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Date: Fri, 09 Mar 2018 16:59:24 +0000
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Subject: Re: [Qemu-devel] [PATCH v3 0/6] arm: support -cpu max (and
 gic-version=max)
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-arm <qemu-arm@nongnu.org>, QEMU Developers <qemu-devel@nongnu.org>, "patches@linaro.org" <patches@linaro.org>, Igor Mammedov <imammedo@redhat.com>, Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= <f4bug@amsat.org>


Peter Maydell <peter.maydell@linaro.org> writes:

> On 9 March 2018 at 13:52, Alex Benn=C3=A9e <alex.bennee@linaro.org> wrote:
>>
>> Peter Maydell <peter.maydell@linaro.org> writes:
>>
>>> This patchset adds support for '-cpu max' to Arm, along the lines
>>> of the existing support we have for x86 targets:
>>>
>>>  * under KVM, -cpu max is the same as -cpu host
>>>  * under TCG, -cpu max means "emulate with as many features as
>>>    possible"
>> <snip>
>>
>> It all looks good to me. The only minor problem I ran into was setting
>> -M virt,gic-version=3Dmax silently hangs with the stock QEMU_EFI.fd on my
>> version of Ubuntu. It would be nice if there was better feedback we
>> could give to the user in this case.
>
> Presumably that also fails if you ask for gic-version=3D3 ?

Yes.

>
>> It works with the latest snapshot from:
>>
>>   http://snapshots.linaro.org/reference-platform/enterprise/firmware/15/=
release/qemu-aarch64/
>
> Sounds like "earlier firmware versions didn't have gicv3 support,
> later ones do" ?

According to the dpkg changelog it should have:

  Adds GICv3 support.  Closes: #810495

However it seems like it wasn't complete support.

--
Alex Benn=C3=A9e