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Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addres
From: |
Marcel Apfelbaum |
Subject: |
Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses |
Date: |
Mon, 09 Sep 2013 16:15:37 +0300 |
On Mon, 2013-09-09 at 14:02 +0100, Peter Maydell wrote:
> On 9 September 2013 13:59, Michael S. Tsirkin <address@hidden> wrote:
> > On Mon, Sep 09, 2013 at 01:52:11PM +0100, Peter Maydell wrote:
> >> It would be conceptually nicer not to treat host bridges as
> >> a special case but instead to just report the abort back
> >> to whatever the PCI master was (which might be a device
> >> doing DMA). That might be a lot of effort though.
>
> > Yes. As a shortcut, what I suggest is registering the
> > device that wants to be notified of master aborts with
> > the bus.
>
> Can you just pick the device which is (a subclass of)
> TYPE_PCI_HOST_BRIDGE, or do we have host bridges which
> aren't using that class?
This is what I would really want to do, but some HOST Bridge devices
inherit directly from PCI_DEVICE.
TYPE_PCI_HOST_BRIDGE derives from TYPE_SYS_BUS_DEVICE which
is a not a PCI device and does not help us here (not a PCI_DEVICE
on the bus)
Strangely TYPE_Q35_HOST_DEVICE derives from TYPE_SYS_BUS_DEVICE
and it hold as composition a PCIDevice that will be part of
the bus, as opposed to TYPE_I440FX_PCI_DEVICE which directly
inherits from PCI_DEVICE.
It seems to me as a dead end, or we need to re-factor the current
hierarchy.
Marcel
>
> -- PMM
- Re: [Qemu-devel] [PATCH RFC v2 1/2] memory: allow MemoryRegion's priority field to accept negative values, (continued)
- [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, Michael S. Tsirkin, 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, Michael S. Tsirkin, 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, 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 <=
- 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, 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, 2013/09/09