From: Jamie Lokier <jamie@shareable.org>
To: Gleb Natapov <gleb@redhat.com>
Cc: qemu-devel@nongnu.org, Gerd Hoffmann <kraxel@redhat.com>,
Avi Kivity <avi@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 2/2] Route IOAPIC interrupts via ISA bus
Date: Thu, 27 Aug 2009 09:18:32 +0100 [thread overview]
Message-ID: <20090827081832.GA22631@shareable.org> (raw)
In-Reply-To: <20090827075728.GJ30093@redhat.com>
Gleb Natapov wrote:
> On Thu, Aug 27, 2009 at 09:40:06AM +0200, Gerd Hoffmann wrote:
> > Or does it mean we must emulate a more recent chipset?
> >
> That too will work.
Note that if you change the chipset, it'll break some existing Windows VMs.
I had this problem when porting a Windows Server 2003 VM from Virtual
PC to QEMU: Virtual PC emulates a PIIX4, while QEMU provides a PIIX3
(even though there's a PIIX4 in the source code, it's not used for PC
emulation). The ported image would not boot because of the change of
chipset, until I patched the registry to accomodate the change.
It will be the same the other way: When some Windows VMs see a change
from PIIX3 to a later chipset, they will not boot.
Some Windows VMs don't care as much. XP seems to be more like Linux,
in that it adapts to different devices at boot time.
-- Jamie
>
> --
> Gleb.
>
>
next prev parent reply other threads:[~2009-08-27 8:18 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-09 16:44 [Qemu-devel] [PATCH 0/2] Disentagle ISA IRQs Avi Kivity
2009-08-09 16:44 ` [Qemu-devel] [PATCH 1/2] Route PC irqs to ISA bus instead of i8259 directly Avi Kivity
2009-08-10 8:34 ` Gerd Hoffmann
2009-08-10 8:46 ` Avi Kivity
2009-08-10 9:04 ` Alexander Graf
2009-08-10 9:43 ` Avi Kivity
2009-08-10 9:45 ` Stefan Assmann
2009-08-10 9:52 ` Avi Kivity
2009-08-10 13:20 ` Olaf Dabrunz
2009-08-10 13:14 ` Olaf Dabrunz
2009-08-09 16:44 ` [Qemu-devel] [PATCH 2/2] Route IOAPIC interrupts via ISA bus Avi Kivity
2009-08-10 8:38 ` Gerd Hoffmann
2009-08-26 16:03 ` Gerd Hoffmann
2009-08-26 16:06 ` Avi Kivity
2009-08-26 16:30 ` Gerd Hoffmann
2009-08-26 19:09 ` Gleb Natapov
2009-08-27 7:40 ` Gerd Hoffmann
2009-08-27 7:57 ` Gleb Natapov
2009-08-27 8:18 ` Jamie Lokier [this message]
2009-08-27 8:24 ` Gleb Natapov
2009-08-27 8:55 ` Gerd Hoffmann
2009-08-27 10:35 ` Isaku Yamahata
2009-08-27 21:07 ` [Qemu-devel] " Bjørn Mork
2009-08-27 4:53 ` [Qemu-devel] " Avi Kivity
2009-08-27 7:35 ` Gerd Hoffmann
2009-08-27 7:57 ` Avi Kivity
2009-08-27 8:13 ` Gerd Hoffmann
2009-08-27 8:26 ` Avi Kivity
2009-08-28 2:20 ` Beth Kon
2009-08-29 17:47 ` Avi Kivity
2009-08-30 2:09 ` Beth Kon
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