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Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE
From: |
Avi Kivity |
Subject: |
Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE |
Date: |
Sun, 04 Mar 2012 14:28:04 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120216 Thunderbird/10.0.1 |
On 03/04/2012 12:27 PM, Blue Swirl wrote:
> On Sun, Mar 4, 2012 at 09:46, Michael S. Tsirkin <address@hidden> wrote:
> > commit 5caef97a16010f818ea8b950e2ee24ba876643ad introduced
> > a regression: we do not make IO base/limit upper 16
> > bit registers writeable, so we should report a 16 bit
> > IO range type, not a 32 bit one.
> > Note that PCI_PREF_RANGE_TYPE_32 is 0x0, but PCI_IO_RANGE_TYPE_32 is 0x1.
> >
> > In particular, this broke sparc64.
> >
> > Note: this just reverts to behaviour prior to the patch.
> > Making PCI_IO_BASE_UPPER16 and PCI_IO_LIMIT_UPPER16
> > registers writeable should, and seems to, work just as well, but
> > as no system seems to actually be interested in 32 bit IO,
> > let's not make unnecessary changes.
> >
> > Reported-by: Mark Cave-Ayland <address@hidden>
> > Signed-off-by: Michael S. Tsirkin <address@hidden>
> >
> > Mark, can you confirm that this fixes the bug for you?
>
> No, running
> qemu-system-sparc64 -serial stdio
> still shows black screen and the following on console:
> OpenBIOS for Sparc64
> Unhandled Exception 0x0000000000000032
> PC = 0x00000000ffd19e18 NPC = 0x00000000ffd19e1c
> Stopping execution
>
> This unassigned memory exception is triggered because CMD646 IDE I/O
> registers are not accessible:
>
> (qemu) info pci
> Bus 0, device 5, function 0:
> IDE controller: PCI device 1095:0646
> IRQ 1.
> BAR0: I/O at 0xffffffffffffffff [0x0006].
> BAR1: I/O at 0xffffffffffffffff [0x0002].
> BAR2: I/O at 0xffffffffffffffff [0x0006].
> BAR3: I/O at 0xffffffffffffffff [0x0002].
> BAR4: I/O at 0xffffffffffffffff [0x000e].
> id ""
The BARs are not initialized, so they aren't accessible.
But perhaps the dump was not taken at the point of failure, can you
provide a relevant dump if so?
--
error compiling committee.c: too many arguments to function
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, (continued)
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Michael S. Tsirkin, 2012/03/04
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Blue Swirl, 2012/03/04
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Michael S. Tsirkin, 2012/03/04
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Blue Swirl, 2012/03/04
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Michael S. Tsirkin, 2012/03/04
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Blue Swirl, 2012/03/05
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Michael S. Tsirkin, 2012/03/06
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Mark Cave-Ayland, 2012/03/04
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Michael S. Tsirkin, 2012/03/04
- Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Michael S. Tsirkin, 2012/03/04
Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE,
Avi Kivity <=
Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Michael S. Tsirkin, 2012/03/04
Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Blue Swirl, 2012/03/04
Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Michael S. Tsirkin, 2012/03/04
Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Blue Swirl, 2012/03/04
Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Michael S. Tsirkin, 2012/03/04
Re: [Qemu-devel] [PATCH] pci: fix bridge IO/BASE, Blue Swirl, 2012/03/04