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Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addres
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses |
Date: |
Mon, 9 Sep 2013 19:00:14 +0300 |
On Mon, Sep 09, 2013 at 03:58:36PM +0100, Peter Maydell wrote:
> On 9 September 2013 15:51, Marcel Apfelbaum <address@hidden> wrote:
> > On Mon, 2013-09-09 at 15:21 +0100, Peter Maydell wrote:
> >> No, it's perfectly possible for a bus master transaction
> >> to abort. The PC's host controller happens to be set up so
> >> that bus master DMA covers the whole of the PCI memory space
> >> and so it's probably not possible to get an abort on that
> >> platform, but this isn't necessarily the case. For instance
> >> the versatilePB's PCI controller only responds to accesses
> >> within its programmed MMIO BAR ranges, so if the device
> >> or the controller have been misconfigured you can get an
> >> abort when the device tries to do DMA. (This usually causes
> >> the device to decide something has gone seriously wrong.
> > Thanks, I am not familiar with versatilePB, I may be able
> > to code it, I don't know how to test it
>
> Don't worry about testing versatilePB particularly; you
> just need to make sure your code can cope with master
> aborts by device initiated transactions.
>
> -- PMM
Device in question being PCI host right?
Just remove the assumption it's device 0...
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, (continued)
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Michael S. Tsirkin, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Peter Maydell, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Marcel Apfelbaum, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Peter Maydell, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Marcel Apfelbaum, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Peter Maydell, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Marcel Apfelbaum, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Peter Maydell, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Marcel Apfelbaum, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Peter Maydell, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses,
Michael S. Tsirkin <=
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Peter Maydell, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Michael S. Tsirkin, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Jan Kiszka, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Peter Maydell, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Jan Kiszka, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Peter Maydell, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Jan Kiszka, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Michael S. Tsirkin, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Peter Maydell, 2013/09/09
- Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses, Jan Kiszka, 2013/09/09