Re: [PATCH v2] docs: add supported host CPU architectures section

[Philippe Mathieu-Daudé]

On 9/13/21 3:50 PM, Peter Maydell wrote:
> On Mon, 13 Sept 2021 at 14:10, <marcandre.lureau@redhat.com> wrote:
>>
>> From: Marc-André Lureau <marcandre.lureau@redhat.com>
>>
>> I was looking for such documentation, but couldn't find it. Add it to
>> the build-platform.rst document.
>>
>> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
>> ---
>>  docs/about/build-platforms.rst | 28 ++++++++++++++++++++++++++++
>>  meson.build                    |  2 +-
>>  2 files changed, 29 insertions(+), 1 deletion(-)
>>
>> diff --git a/docs/about/build-platforms.rst b/docs/about/build-platforms.rst
>> index 692323609e..518a19aff7 100644
>> --- a/docs/about/build-platforms.rst
>> +++ b/docs/about/build-platforms.rst
>> @@ -29,6 +29,34 @@ The `Repology`_ site is a useful resource to identify
>>  currently shipped versions of software in various operating systems,
>>  though it does not cover all distros listed below.
>>
>> +Supported host architectures
>> +----------------------------
>> +
>> +Those hosts have a native TCG backend and are regularly tested:
>> +
>> +  .. list-table::
>> +   :header-rows: 1
>> +
>> +   * - CPU Architecture
>> +     - Accelerators
>> +   * - Arm
>> +     - kvm (64 bit only), xen
>> +   * - MIPS
>> +     - kvm
>> +   * - PPC
>> +     - kvm
>> +   * - RISC-V
>> +     -
>> +   * - s390x
>> +     - kvm
>> +   * - SPARC
>> +     -
>> +   * - x86
>> +     - kvm, xen, hax, hvf (64 bit only), nvmm, whpx (64 bit only)
> 
> I still wonder if this would be clearer if we listed 'tcg' as
> an accelerator like all the others, rather than describing it as
> a kind of special case in the text above the table. After all, you
> can select it with '-accel tcg' the same as any other.
> 
> I think the information in the table is correct now.

What is TCI at this point?

> Sort the list of accelerators alphabetically ?
> 
>> +
>> +Other architectures are not actively maintained. They may be removed in 
>> future
>> +releases.

What are the other archs which could be removed?

FYI QEMU is still being built by Debian on alpha/hppa/ia64:

https://buildd.debian.org/status/package.php?p=qemu&suite=sid

Recent failures comes from:

../meson.build:1218:6: ERROR: Problem encountered: virtio-9p (virtfs)
needs system emulation support

Which is a bug but I hadn't time to look at it.