qemu-devel.nongnu.org archive mirror
 help / color / mirror / Atom feed
From: "Philippe Mathieu-Daudé" <f4bug@amsat.org>
To: "Thomas Huth" <thuth@redhat.com>,
	"BALATON Zoltan" <balaton@eik.bme.hu>,
	"Cédric Le Goater" <clg@kaod.org>,
	"Richard Henderson" <richard.henderson@linaro.org>
Cc: "Christophe Leroy" <christophe.leroy@c-s.fr>,
	"Peter Maydell" <peter.maydell@linaro.org>,
	dbarboza@redhat.com, "Alexey Kardashevskiy" <aik@ozlabs.ru>,
	"Greg Kurz" <groug@kaod.org>,
	"Christophe Leroy" <christophe.leroy@csgroup.eu>,
	"QEMU Developers" <qemu-devel@nongnu.org>,
	"Alexander Graf" <agraf@csgraf.de>,
	qemu-ppc <qemu-ppc@nongnu.org>,
	"Wainer dos Santos Moschetta" <wainersm@redhat.com>,
	"Cleber Rosa" <crosa@redhat.com>,
	"Hervé Poussineau" <hpoussin@reactos.org>,
	"David Gibson" <david@gibson.dropbear.id.au>
Subject: Re: Deprecate the ppc405 boards in QEMU? (was: [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms)
Date: Wed, 20 Oct 2021 12:26:02 +0200	[thread overview]
Message-ID: <103e098a-a8ac-a22a-8aad-3df7d8cde148@amsat.org> (raw)
In-Reply-To: <b9f27c1b-1162-b178-9333-89c0dd707c12@redhat.com>

+Richard

On 10/5/21 14:29, Thomas Huth wrote:
> On 05/10/2021 14.20, BALATON Zoltan wrote:
>> On Tue, 5 Oct 2021, Cédric Le Goater wrote:
>>> On 10/5/21 08:18, Alexey Kardashevskiy wrote:
>>>> On 05/10/2021 15:44, Christophe Leroy wrote:
>>>>> Le 05/10/2021 à 02:48, David Gibson a écrit :
>>>>>> On Fri, Oct 01, 2021 at 04:18:49PM +0200, Thomas Huth wrote:
>>>>>>> On 01/10/2021 15.04, Christophe Leroy wrote:
>>>>>>>> Le 01/10/2021 à 14:04, Thomas Huth a écrit :
>>>>>>>>> On 01/10/2021 13.12, Peter Maydell wrote:
>>>>>>>>>> On Fri, 1 Oct 2021 at 10:43, Thomas Huth <thuth@redhat.com>
>>>>>>>>>> wrote:
>>>>>>>>>>> Nevertheless, as long as nobody has a hint where to find that
>>>>>>>>>>> ppc405_rom.bin, I think both boards are pretty useless in
>>>>>>>>>>> QEMU (as far as I
>>>>>>>>>>> can see, they do not work without the bios at all, so it's
>>>>>>>>>>> also not possible
>>>>>>>>>>> to use a Linux image with the "-kernel" CLI option directly).
>>>>>>>>>>
>>>>>>>>>> It is at least in theory possible to run bare-metal code on
>>>>>>>>>> either board, by passing either a pflash or a bios argument.
>>>>>>>>>
>>>>>>>>> True. I did some more research, and seems like there was once
>>>>>>>>> support for those boards in u-boot, but it got removed there a
>>>>>>>>> couple of years ago already:
>>>>>>>>>
>>>>>>>>> https://gitlab.com/qemu-project/u-boot/-/commit/98f705c9cefdf
>>>>>>>>>
>>>>>>>>> https://gitlab.com/qemu-project/u-boot/-/commit/b147ff2f37d5b
>>>>>>>>>
>>>>>>>>> https://gitlab.com/qemu-project/u-boot/-/commit/7514037bcdc37
>>>>>>>>>
>>>>>>>>>> But I agree that there seem to be no signs of anybody actually
>>>>>>>>>> successfully using these boards for anything, so we should
>>>>>>>>>> deprecate-and-delete them.
>>>>>>>>>
>>>>>>>>> Yes, let's mark them as deprecated now ... if someone still uses
>>>>>>>>> them and speaks up, we can still revert the deprecation again.
>>>>>>>>
>>>>>>>> I really would like to be able to use them to validate Linux Kernel
>>>>>>>> changes, hence looking for that missing BIOS.
>>>>>>>>
>>>>>>>> If we remove ppc405 from QEMU, we won't be able to do any
>>>>>>>> regression
>>>>>>>> tests of Linux Kernel on those processors.
>>>>>>>
>>>>>>> If you/someone managed to compile an old version of u-boot for
>>>>>>> one of these
>>>>>>> two boards, so that we would finally have something for
>>>>>>> regression testing,
>>>>>>> we can of course also keep the boards in QEMU...
>>>>>>
>>>>>> I can see that it would be usefor for some cases, but unless someone
>>>>>> volunteers to track down the necessary firmware and look after it, I
>>>>>> think we do need to deprecate it - I certainly don't have the
>>>>>> capacity
>>>>>> to look into this.
>>>>>>
>>>>>
>>>>> I will look at it, please allow me a few weeks though.
>>>>
>>>> Well, building it was not hard but now I'd like to know what board
>>>> QEMU actually emulates, there are way too many codenames and PVRs.
>>>
>>> yes. We should try to reduce the list below. Deprecating embedded
>>> machines
>>> is one way.
>>
>> Why should we reduce that list? It's good to have different cpu
>> options when one wants to test code for different PPC versions (maybe
>> also in user mode) or just to have a quick list of these at one place.
> 
> I think there are many CPUs in that list which cannot be used with any
> board, some of them might be also in a very incomplete state. So
> presenting such a big list to the users is confusing and might create
> wrong expectations. It would be good to remove at least the CPUs which
> are really completely useless.

Maybe only remove some from system emulation but keep all of them
in user emulation?


  reply	other threads:[~2021-10-20 11:18 UTC|newest]

Thread overview: 93+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-27  4:48 [PATCH v3 0/7] Reduce load on ppc target maintainers David Gibson
2021-09-27  4:48 ` [PATCH v3 1/7] qemu: Split machine_ppc.py acceptance tests David Gibson
2021-09-27  4:50   ` Philippe Mathieu-Daudé
2021-09-27 16:44   ` Philippe Mathieu-Daudé
2021-09-27 16:53     ` Cédric Le Goater
2021-09-27 17:18       ` Philippe Mathieu-Daudé
2021-09-27  4:48 ` [PATCH v3 2/7] MAINTAINERS: Remove machine specific files from ppc TCG CPUs entry David Gibson
2021-09-27  4:48 ` [PATCH v3 3/7] MAINTAINERS: Remove David & Greg as reviewers for a number of boards David Gibson
2021-09-27  4:48 ` [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms David Gibson
2021-10-01  8:35   ` Deprecate the ppc405 boards in QEMU? (was: [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms) Thomas Huth
2021-10-01  9:14     ` Christophe Leroy
2021-10-01  9:43       ` Thomas Huth
2021-10-01 11:12         ` Peter Maydell
2021-10-01 12:04           ` Thomas Huth
2021-10-01 13:04             ` Christophe Leroy
2021-10-01 13:14               ` Cédric Le Goater
2021-10-01 13:24               ` Peter Maydell
2021-10-01 14:18               ` Thomas Huth
2021-10-05  0:48                 ` David Gibson
2021-10-05  4:44                   ` Christophe Leroy
2021-10-05  6:18                     ` Alexey Kardashevskiy
2021-10-05  6:42                       ` Thomas Huth
2021-10-05  8:05                         ` Alexey Kardashevskiy
2021-10-05  8:07                           ` Thomas Huth
2021-10-05  8:51                             ` Deprecate the ppc405 boards in QEMU? Thomas Huth
2021-10-05 12:17                               ` BALATON Zoltan
2021-10-05 12:35                                 ` Thomas Huth
2021-10-05 21:53                                   ` BALATON Zoltan
2021-10-06  6:39                                     ` Thomas Huth
2021-10-06  7:25                                     ` Thomas Huth
2021-10-11  8:10                                       ` Thomas Huth
2021-10-11  9:20                                         ` David Gibson
2021-10-11 13:24                                           ` Thomas Huth
2021-10-19  9:31                                             ` Christophe Leroy
2021-10-19  9:39                                               ` Thomas Huth
2021-10-19  9:48                                                 ` Christophe Leroy
2021-10-19 10:07                                                   ` BALATON Zoltan
2021-10-19 11:11                                                     ` Thomas Huth
2021-10-19 11:51                                                       ` Christophe Leroy
2021-10-19 12:38                                                         ` BALATON Zoltan
2021-10-19 13:44                                                           ` Christophe Leroy
2021-10-19 14:24                                                             ` Christophe Leroy
2021-10-19 14:56                                                               ` BALATON Zoltan
2021-10-19 16:12                                                                 ` Christophe Leroy
2021-10-19 20:55                                                                   ` Cédric Le Goater
2021-10-19 21:30                                                                   ` Cédric Le Goater
2021-10-20  9:02                                                                     ` Christophe Leroy
2021-10-20 10:10                                                                       ` Cédric Le Goater
2021-10-20 13:27                                                                         ` LEROY Christophe
2021-10-20 14:31                                                                           ` BALATON Zoltan
2021-10-20 14:34                                                                             ` Thomas Huth
2021-10-20 14:41                                                                               ` Cédric Le Goater
2021-10-20 15:03                                                                                 ` LEROY Christophe
2021-10-20 14:39                                                                           ` Cédric Le Goater
2021-10-20 15:28                                                                             ` LEROY Christophe
2021-10-20 10:21                                                       ` Philippe Mathieu-Daudé
2021-10-20 11:40                                                         ` BALATON Zoltan
2021-10-20 10:12                                                     ` CLI: Using -bios AND -kernel Philippe Mathieu-Daudé
2021-10-20 10:54                                                       ` Thomas Huth
2021-10-20 11:35                                                         ` BALATON Zoltan
2021-10-19  9:41                                               ` Deprecate the ppc405 boards in QEMU? Greg Kurz
2021-10-05  8:14                       ` Deprecate the ppc405 boards in QEMU? (was: [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms) Cédric Le Goater
2021-10-05 12:20                         ` BALATON Zoltan
2021-10-05 12:29                           ` Thomas Huth
2021-10-20 10:26                             ` Philippe Mathieu-Daudé [this message]
2021-10-20 11:42                               ` BALATON Zoltan
2021-10-20 12:43                                 ` Cédric Le Goater
2021-10-20 13:16                                   ` LEROY Christophe
2021-10-20 15:04                                     ` Simon Marchi
2021-10-21  6:48                                     ` Christophe Leroy
2021-10-21  7:25                                       ` Deprecate the ppc405 boards in QEMU? Thomas Huth
2021-10-21  8:01                                         ` Christophe Leroy
2021-10-28 12:24                                     ` Deprecate the ppc405 boards in QEMU? (was: [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms) Luis Machado
2021-10-28 17:27                                       ` Christophe Leroy
2021-10-20 13:35                                   ` Deprecate the ppc405 boards in QEMU? Thomas Huth
2021-10-20 14:55                                     ` BALATON Zoltan
2021-10-20 15:04                                       ` Thomas Huth
2021-10-20 14:16                                   ` Deprecate the ppc405 boards in QEMU? (was: [PATCH v3 4/7] MAINTAINERS: Orphan obscure ppc platforms) BALATON Zoltan
2021-10-05  8:49                     ` Daniel P. Berrangé
2021-10-05 16:15                       ` Philippe Mathieu-Daudé
2021-10-05 16:20                         ` Daniel P. Berrangé
2021-10-27  4:06                           ` Philippe Mathieu-Daudé
2021-10-27  8:40                             ` Cédric Le Goater
2021-10-27 10:42                               ` Christophe Leroy
2021-10-27 10:48                                 ` Philippe Mathieu-Daudé
2021-10-27 17:03                                 ` Cédric Le Goater
2021-09-27  4:48 ` [PATCH v3 5/7] MAINTAINERS: Remove David & Greg as reviewers/co-maintainers of powernv David Gibson
2021-09-27  4:48 ` [PATCH v3 6/7] MAINTAINERS: Add information for OpenPIC David Gibson
2021-09-29  7:08   ` Mark Cave-Ayland
2021-09-27  4:48 ` [PATCH v3 7/7] MAINTAINERS: Demote sPAPR from "Supported" to "Maintained" David Gibson
2021-09-30  1:15 ` [PATCH v3 0/7] Reduce load on ppc target maintainers David Gibson
2021-10-06  9:52   ` Alexey Kardashevskiy
2021-10-06 11:03     ` Greg Kurz

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=103e098a-a8ac-a22a-8aad-3df7d8cde148@amsat.org \
    --to=f4bug@amsat.org \
    --cc=agraf@csgraf.de \
    --cc=aik@ozlabs.ru \
    --cc=balaton@eik.bme.hu \
    --cc=christophe.leroy@c-s.fr \
    --cc=christophe.leroy@csgroup.eu \
    --cc=clg@kaod.org \
    --cc=crosa@redhat.com \
    --cc=david@gibson.dropbear.id.au \
    --cc=dbarboza@redhat.com \
    --cc=groug@kaod.org \
    --cc=hpoussin@reactos.org \
    --cc=peter.maydell@linaro.org \
    --cc=qemu-devel@nongnu.org \
    --cc=qemu-ppc@nongnu.org \
    --cc=richard.henderson@linaro.org \
    --cc=thuth@redhat.com \
    --cc=wainersm@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).