From: Gerd Hoffmann <kraxel@redhat.com>
To: Markus Armbruster <armbru@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 2/2] all vga: fail graicefully when vga ports are taken
Date: Tue, 18 May 2010 14:45:40 +0200 [thread overview]
Message-ID: <4BF28BF4.4070602@redhat.com> (raw)
In-Reply-To: <m3sk5pl787.fsf@blackfin.pond.sub.org>
On 05/18/10 14:33, Markus Armbruster wrote:
> Gerd Hoffmann<kraxel@redhat.com> writes:
>
>> Try to pci hotplug a vga card, watch qemu die with hw_error().
>> This patch fixes it.
>
> Looks good.
>
> Are there any other hot-pluggable devices that acquire single-use
> resources such as fixed I/O ports?
Any PCI device doing ISA compatibility stuff I'd guess, which makes IDE
a candidate. Checking ...
Yes (hw/ide/piix.c):
ide_init_ioport(&d->bus[0], 0x1f0, 0x3f6);
ide_init_ioport(&d->bus[1], 0x170, 0x376);
Those are tagged with "no-user" though due to being hard-coded in pc.c,
so any attempt to hot-plug one of those should fail way before it
attempts to grab the I/O ports.
cheers,
Gerd
next prev parent reply other threads:[~2010-05-18 12:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-11 20:43 [Qemu-devel] [PATCH 1/2] ioport: add function to check whenever a port is assigned or not Gerd Hoffmann
2010-05-11 20:43 ` [Qemu-devel] [PATCH 2/2] all vga: fail graicefully when vga ports are taken Gerd Hoffmann
2010-05-12 18:59 ` Blue Swirl
2010-05-18 12:33 ` Markus Armbruster
2010-05-18 12:45 ` Gerd Hoffmann [this message]
2010-05-18 14:06 ` Markus Armbruster
-- strict thread matches above, loose matches on Subject: below --
2010-05-19 9:54 [Qemu-devel] [PATCH 1/2] ioport: add function to check whenever a port is assigned or not Gerd Hoffmann
2010-05-19 9:54 ` [Qemu-devel] [PATCH 2/2] all vga: fail graicefully when vga ports are taken Gerd Hoffmann
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