[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH RFC 0/3] pci: complete master abort protocol
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] [PATCH RFC 0/3] pci: complete master abort protocol |
Date: |
Mon, 2 Sep 2013 15:30:12 +0100 |
On 2 September 2013 15:13, Marcel Apfelbaum <address@hidden> wrote:
> Note: The series is incomplete, for review only
>
> PCI spec requires that a transaction that has not been claimed
> by any PCI bus devices will be terminated by the initiator
> with "master abort". For read transactions -1(FFFFFFFF) is returned and
> writes are silently dropped. (already implemented in quemu)
...but only erroneously and by breaking a pile of other boards.
> Note:
> For the moment the code assumes that all the reads/writes on
> pci address space are done by the cpu.
This is a bogus assumption in the presence of bus mastering
PCI devices, which aren't exactly uncommon.
-- PMM
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, (continued)
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Peter Maydell, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Marcel Apfelbaum, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Andreas Färber, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Peter Maydell, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Michael S. Tsirkin, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Peter Maydell, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Michael S. Tsirkin, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Peter Maydell, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Marcel Apfelbaum, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Michael S. Tsirkin, 2013/09/02
Re: [Qemu-devel] [PATCH RFC 0/3] pci: complete master abort protocol,
Peter Maydell <=