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Re: [Qemu-devel] [PATCH 00/10] Fix versatile_pci (and break versatilepb
From: |
Arnd Bergmann |
Subject: |
Re: [Qemu-devel] [PATCH 00/10] Fix versatile_pci (and break versatilepb linux guests!) |
Date: |
Sun, 24 Mar 2013 22:45:28 +0000 |
User-agent: |
KMail/1.12.2 (Linux/3.8.0-13-generic; KDE/4.3.2; x86_64; ; ) |
On Sunday 24 March 2013, Peter Maydell wrote:
> OK, I'll give that a go tomorrow.
>
> While you're here, do you know what the point of the PCI_SELFID
> register is? The h/w docs are clear that the OS has to write
> the slot number of the board itself in to this register, but
> again I don't see why the OS has to tell the hardware something
> it already knows. On QEMU I just implemented this register as
> a no-op and everything seems to still function...
>
I don't know really, but I think it has something to do with the
versatile board being plugged into a backplane that has multiple
slots. Apparently there is something the hardware cannot figure
out itself, e.g. whether to route the interrupts in or out of the
slot.
Arnd
- Re: [Qemu-devel] [PATCH 07/10] versatile_pci: Implement the correct PCI IRQ mapping, (continued)
- [Qemu-devel] [PATCH 05/10] versatile_pci: Use separate PCI I/O space rather than system I/O space, Peter Maydell, 2013/03/24
- [Qemu-devel] [PATCH 04/10] versatile_pci: Change to subclassing TYPE_PCI_HOST_BRIDGE, Peter Maydell, 2013/03/24
- Re: [Qemu-devel] [PATCH 00/10] Fix versatile_pci (and break versatilepb linux guests!), Aurelien Jarno, 2013/03/24
- Re: [Qemu-devel] [PATCH 00/10] Fix versatile_pci (and break versatilepb linux guests!), Peter Maydell, 2013/03/24
- Re: [Qemu-devel] [PATCH 00/10] Fix versatile_pci (and break versatilepb linux guests!), Michael S. Tsirkin, 2013/03/24
- Re: [Qemu-devel] [PATCH 00/10] Fix versatile_pci (and break versatilepb linux guests!), Michael S. Tsirkin, 2013/03/24
- Re: [Qemu-devel] [PATCH 00/10] Fix versatile_pci (and break versatilepb linux guests!), Arnd Bergmann, 2013/03/24
- Re: [Qemu-devel] [PATCH 00/10] Fix versatile_pci (and break versatilepb linux guests!), Peter Maydell, 2013/03/25
- Re: [Qemu-devel] [PATCH 00/10] Fix versatile_pci (and break versatilepb linux guests!), Michael S. Tsirkin, 2013/03/24