[libvirt] [PATCH-for-4.2] hw/mips: Deprecate the r4k machine

[Aleksandar Markovic]

On Tuesday, November 26, 2019, Philippe Mathieu-Daudé <philmd at redhat.com>
wrote:

> Hi Aleksandar,
>
> On 11/26/19 9:46 PM, Aleksandar Markovic wrote:
>
>> On Mon, Nov 25, 2019 at 11:41 AM Philippe Mathieu-Daudé
>> <philmd at redhat.com> wrote:
>>
>>>
>>> The r4k machine was introduced in 2005 (6af0bf9c7) and its last
>>> logical change was in 2005 (9542611a6). After we can count 164
>>> maintenance commits (QEMU API changes) with the exception of
>>> 1 fix in 2015 (memory leak, commit 3ad9fd5a).
>>>
>>> This machine was introduced as a proof of concept to run a MIPS
>>> CPU. 2 years later, the Malta machine was add (commit 5856de80)
>>> modeling a real platform.
>>>
>>> Note also this machine has no specification except 5 lines in
>>> the header of this file:
>>>
>>>   * emulates a simple machine with ISA-like bus.
>>>   * ISA IO space mapped to the 0x14000000 (PHYS) and
>>>   * ISA memory at the 0x10000000 (PHYS, 16Mb in size).
>>>   * All peripherial devices are attached to this "bus" with
>>>   * the standard PC ISA addresses.
>>>
>>> It is time to deprecate this obsolete machine. Users are
>>> recommended to use the Malta board, which hardware is well
>>> documented.
>>>
>>> Signed-off-by: Philippe Mathieu-Daudé <philmd at redhat.com>
>>> ---
>>>
>>
>> Philippe,
>>
>> I see you added "libvir-list" in "cc". Was it a mistake, or there was
>> some purpose?
>>
>
> I don't pick the series recipient manually, I send my series with
> git-publish. Here it used the default QEMU profile.
>
> All profiles call git-sendmail with the cc-cmd set to the
> get_maintainer.pl script:
>
> $ cat .gitpublish
> #
> # Common git-publish profiles that can be used to send patches to QEMU
> upstream.
> #
> # See https://github.com/stefanha/git-publish for more information
> #
> [gitpublishprofile "default"]
> base = master
> to = qemu-devel at nongnu.org
> cccmd = scripts/get_maintainer.pl --noroles --norolestats --nogit
> --nogit-fallback 2>/dev/null
>
> Having a closer look, libvir-list list was Cc'ed because it is listed as
> reviewer of the qemu-deprecated.texi file, which was modified.
>
> ./scripts/get_maintainer.pl -f qemu-deprecated.texi
> libvir-list at redhat.com (reviewer:Incompatible changes)
> qemu-devel at nongnu.org (open list:All patches CC here)
>
>
OK. No problem. It just looked strange.

As far as consuktations, I am just waiting for some responses within
company to establish if somebody is perhaps using this machine with some
ancient kernel. I got some opinions that are in favor of R4000 machine
deprecating, but I need to wait for all relevant departments to confirm.

What happened to TileGX?

Yours,
Aleksandar



>   qemu-deprecated.texi | 5 +++++
>>>   hw/mips/mips_r4k.c   | 1 +
>>>   MAINTAINERS          | 2 +-
>>>   3 files changed, 7 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi
>>> index 4b4b7425ac..05265b43c8 100644
>>> --- a/qemu-deprecated.texi
>>> +++ b/qemu-deprecated.texi
>>> @@ -266,6 +266,11 @@ The 'scsi-disk' device is deprecated. Users should
>>> use 'scsi-hd' or
>>>
>>>   @section System emulator machines
>>>
>>> + at subsection mips r4k platform (since 4.2)
>>> +
>>> +This machine type is very old and unmaintained. Users should use the
>>> 'malta'
>>> +machine type instead.
>>> +
>>>   @subsection pc-0.12, pc-0.13, pc-0.14 and pc-0.15 (since 4.0)
>>>
>>>   These machine types are very old and likely can not be used for live
>>> migration
>>> diff --git a/hw/mips/mips_r4k.c b/hw/mips/mips_r4k.c
>>> index 70024235ae..0b79ad26cb 100644
>>> --- a/hw/mips/mips_r4k.c
>>> +++ b/hw/mips/mips_r4k.c
>>> @@ -294,6 +294,7 @@ void mips_r4k_init(MachineState *machine)
>>>
>>>   static void mips_machine_init(MachineClass *mc)
>>>   {
>>> +    mc->deprecation_reason = "use malta machine type instead";
>>>       mc->desc = "mips r4k platform";
>>>       mc->init = mips_r4k_init;
>>>       mc->block_default_type = IF_IDE;
>>> diff --git a/MAINTAINERS b/MAINTAINERS
>>> index 5e5e3e52d6..3b3a88e264 100644
>>> --- a/MAINTAINERS
>>> +++ b/MAINTAINERS
>>> @@ -972,7 +972,7 @@ F: hw/net/mipsnet.c
>>>   R4000
>>>   M: Aurelien Jarno <aurelien at aurel32.net>
>>>   R: Aleksandar Rikalo <aleksandar.rikalo at rt-rk.com>
>>> -S: Maintained
>>> +S: Obsolete
>>>   F: hw/mips/mips_r4k.c
>>>
>>>   Fulong 2E
>>> --
>>> 2.21.0
>>>
>>>
>>>
>>
>
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