Re: [Qemu-devel] [PATCH 0/3] pci: allow PCI bus slots to be marked as reserved

[Marcel Apfelbaum]

On 11/07/2017 18:31, Michael S. Tsirkin wrote:
> On Fri, Jul 07, 2017 at 08:43:59AM +0100, Mark Cave-Ayland wrote:
> > For some machines it is impossible to plug devices into a particular PCI bus
> > slot, e.g. for a real Ultra 5 there are 2 PCI bridges attached to the root
> > bus behind which all devices must be plugged. Ignoring this rule will cause
> > problems with interrupt routing since the interrupt numbers are calculated
> > based upon PCI bridge id and secondary PCI bus slot id.
> >
> > This patchset adds a new dev_reserved_mask property to PCIBus which is a
> > bitmask used to indicate whether PCI bus slots are reserved, i.e. they cannot
> > be used for hot or cold plugging on a particular PCI bus.
> >
> > Signed-off-by: Mark Cave-Ayland <address@hidden>

Hi Michael,

> Could you please point me at series making use of this
> functionality?

There is a discussion upstream, I am not aware of patches yet.

https://lists.gnu.org/archive/html/qemu-devel/2017-07/msg00771.html

Thanks,
Marcel


> Thanks!
>
> > Mark Cave-Ayland (3):
> >    pci: move check for existing devfn into new pci_bus_devfn_available()
> >      helper
> >    pci: add dev_reserved_mask property to PCIBus
> >    pci: add reserved slot check to do_pci_register_device()
> >
> >   hw/pci/pci.c             |   34 ++++++++++++++++++++++++++++++----
> >   include/hw/pci/pci_bus.h |    1 +
> >   2 files changed, 31 insertions(+), 4 deletions(-)
> >
> > --
> > 1.7.10.4