From: Thomas Huth <thuth@redhat.com>
To: Gerd Hoffmann <kraxel@redhat.com>,
"Daniel P. Berrange" <berrange@redhat.com>
Cc: "Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Eduardo Habkost" <ehabkost@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
qemu-devel@nongnu.org,
"Alistair Francis" <alistair.francis@xilinx.com>,
"Marcel Apfelbaum" <marcel@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Richard Henderson" <rth@twiddle.net>
Subject: Re: [Qemu-devel] [RFC PATCH 6/6] hw/i386: deprecate the "isapc" machine
Date: Wed, 8 Nov 2017 11:05:15 +0100 [thread overview]
Message-ID: <470e67ec-fe1e-2692-c14c-5c843a9d3053@redhat.com> (raw)
In-Reply-To: <20171108094421.ta2wumq36gux3m5s@sirius.home.kraxel.org>
On 08.11.2017 10:44, Gerd Hoffmann wrote:
> On Wed, Nov 08, 2017 at 09:09:00AM +0000, Daniel P. Berrange wrote:
>> On Tue, Nov 07, 2017 at 11:28:28PM -0300, Philippe Mathieu-Daudé wrote:
>>> Deprecated since 2.9.0, guests should be able to use "pc" instead.
>>
>> Isn't isapc important to allow QEMU to old operating systems that
>> predate the PCI era.
>
> They should work fine. The early pci chipsets like the piix4 have
> built-in backward compatibility. The IDE controller can be driven by
> simply accessing the isa ide ports. Likewise vga. You can plug in ne2k
> (we have both isa and pci variants) for ethernet and sb16 (isa too) for
> sound.
>
> That should make guests which don't know anything about pci happy.
>
>> I do recall seeing some messages about specific
>> cases where you cannot use the 'pc' machine type and we suggested
>> used of 'isapc' instead, but can't remember the exact details..
>
> I'd like to see such use cases where isapc is actually required.
Just my 0.02 €: I like the idea of keeping isapc. It's a way to remind
the x86 folks that there are also architectures without PCI / APIC /
ACPI. And this helped to spot some bugs in some HMP commands in the past
already.
> Well, nobody maintains it. Nobody tests it.
At least we've got the automatic boot-serial-test now that checks that
the machine is not completely broken.
Thomas
next prev parent reply other threads:[~2017-11-08 10:05 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-08 2:28 [Qemu-devel] [RFC PATCH 0/6] generic way to deprecate machines Philippe Mathieu-Daudé
2017-11-08 2:28 ` [Qemu-devel] [RFC PATCH 1/6] machine: add a deprecated_reason property Philippe Mathieu-Daudé
2017-11-08 10:23 ` Thomas Huth
2017-11-08 10:27 ` Daniel P. Berrange
2017-11-08 20:29 ` Eduardo Habkost
2018-01-22 2:10 ` Philippe Mathieu-Daudé
2018-01-22 6:21 ` Thomas Huth
2017-11-08 2:28 ` [Qemu-devel] [RFC PATCH 2/6] hw/arm: deprecate the EP108 board Philippe Mathieu-Daudé
2017-11-08 9:17 ` Daniel P. Berrange
2017-11-08 2:28 ` [Qemu-devel] [RFC PATCH 3/6] hw/arm: deprecate the Gumstix boards Philippe Mathieu-Daudé
2017-11-08 2:28 ` [Qemu-devel] [RFC PATCH 4/6] hw/ppc: deprecate the PReP machine Philippe Mathieu-Daudé
2017-11-08 2:28 ` [Qemu-devel] [RFC PATCH 5/6] hw/i386: deprecate the pc-0.10 and pc-0.11 machines Philippe Mathieu-Daudé
2017-11-08 2:48 ` Alexey Kardashevskiy
2017-11-08 3:28 ` Philippe Mathieu-Daudé
2017-11-08 9:13 ` Daniel P. Berrange
2017-11-08 10:43 ` Thomas Huth
2017-11-08 9:16 ` Daniel P. Berrange
2017-11-08 10:15 ` Thomas Huth
2017-11-08 11:36 ` Thomas Huth
2017-11-08 2:28 ` [Qemu-devel] [RFC PATCH 6/6] hw/i386: deprecate the "isapc" machine Philippe Mathieu-Daudé
2017-11-08 3:29 ` Philippe Mathieu-Daudé
2017-11-08 9:09 ` Daniel P. Berrange
2017-11-08 9:44 ` Gerd Hoffmann
2017-11-08 10:05 ` Thomas Huth [this message]
2017-11-08 9:10 ` [Qemu-devel] [RFC PATCH 0/6] generic way to deprecate machines Daniel P. Berrange
2018-05-04 17:15 ` Thomas Huth
2018-05-08 15:47 ` Philippe Mathieu-Daudé
2018-05-11 13:55 ` [Qemu-devel] Publishing binary images for testing (was Re: [RFC PATCH 0/6] generic way to deprecate machines) Eduardo Habkost
2018-05-11 14:27 ` Cleber Rosa
2018-05-18 18:16 ` Alistair Francis
2018-05-22 16:17 ` Cleber Rosa
2018-05-22 16:34 ` Alistair Francis
2019-06-17 5:17 ` [Qemu-devel] Publishing binary images for testing Philippe Mathieu-Daudé
2019-08-16 10:51 ` Philippe Mathieu-Daudé
2019-08-19 13:10 ` Cleber Rosa
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