Re: [Qemu-devel] [PATCH v3 0/6] arm: support -cpu max (and gic-version=max)

[Alex Bennée]

Peter Maydell <address@hidden> writes:

> On 9 March 2018 at 13:52, Alex Bennée <address@hidden> wrote:
>>
>> Peter Maydell <address@hidden> 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=max 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=3 ?

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 Bennée