From: Juan Quintela <quintela@redhat.com>
To: Thomas Huth <thuth@redhat.com>
Cc: qemu-devel@nongnu.org, "Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"Hervé Poussineau" <hpoussin@reactos.org>,
"Gerd Hoffmann" <kraxel@redhat.com>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>
Subject: Re: [PATCH v2 3/4] hw/display/vga-mmio: QOM'ify vga_mmio_init() as TYPE_VGA_MMIO
Date: Tue, 14 Dec 2021 13:05:29 +0100 [thread overview]
Message-ID: <87o85jz912.fsf@secure.mitica> (raw)
In-Reply-To: <99ebc4fb-f061-1e57-da07-e66035bacf9b@redhat.com> (Thomas Huth's message of "Mon, 13 Dec 2021 11:48:20 +0100")
Thomas Huth <thuth@redhat.com> wrote:
> On 06/12/2021 23.45, Philippe Mathieu-Daudé wrote:
>> Introduce TYPE_VGA_MMIO, a sysbus device.
>> While there is no change in the vga_mmio_init()
>> interface, this is a migration compatibility break
>> of the MIPS Acer Pica 61 Jazz machine (pica61).
>
> It's unfortunate, but as far as I know, it would be pretty difficult
> or even impossible to get this done without versioned machine types?
> So IMHO it's ok to break this in this case here.
Hi
My understanding is that outside of x86*, and now ppc, arm and s390,
no one else really cares about migration compatibility. I am not even
sure if they really care about migration at all O:-)
So, if the code is better for other reasons, I will not wonder about
migration compatibility.
Later, Juan.
next prev parent reply other threads:[~2021-12-14 12:07 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-06 22:45 [PATCH v2 0/4] hw/display: QOM'ify vga_mmio_init() as TYPE_VGA_MMIO Philippe Mathieu-Daudé
2021-12-06 22:45 ` [PATCH v2 1/4] hw/display: Rename VGA_ISA_MM -> VGA_MMIO Philippe Mathieu-Daudé
2021-12-06 22:45 ` [PATCH v2 2/4] hw/display/vga-mmio: Inline vga_mm_init() Philippe Mathieu-Daudé
2021-12-06 22:45 ` [PATCH v2 3/4] hw/display/vga-mmio: QOM'ify vga_mmio_init() as TYPE_VGA_MMIO Philippe Mathieu-Daudé
2021-12-13 10:48 ` Thomas Huth
2021-12-13 11:05 ` Philippe Mathieu-Daudé
2021-12-13 22:46 ` Mark Cave-Ayland
2021-12-14 12:05 ` Juan Quintela [this message]
2021-12-14 12:52 ` Daniel P. Berrangé
2021-12-14 13:07 ` Philippe Mathieu-Daudé
2021-12-06 22:45 ` [PATCH v2 4/4] hw/mips/jazz: Inline vga_mmio_init() and remove it Philippe Mathieu-Daudé
2021-12-13 10:15 ` Thomas Huth
2021-12-13 9:53 ` [PATCH v2 0/4] hw/display: QOM'ify vga_mmio_init() as TYPE_VGA_MMIO Philippe Mathieu-Daudé
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