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Re: [Qemu-devel] [PATCHv2 0/2] pci: allow PCI bus slots to be marked as


From: Mark Cave-Ayland
Subject: Re: [Qemu-devel] [PATCHv2 0/2] pci: allow PCI bus slots to be marked as reserved
Date: Fri, 14 Jul 2017 10:59:14 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1

On 11/07/17 22:44, 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 slot_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>
> 
> v2:
> - Rename dev_reserved_mask to slot_reserved_mask as suggested by Marcel
> - Squash patches 2 and 3 together
> 
> 
> Mark Cave-Ayland (2):
>   pci: move check for existing devfn into new pci_bus_devfn_available()
>     helper
>   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(-)

Ping? Any further feedback on the v2 version? My latest set of sun4u
patches is dependent upon this patchset and it's freeze coming up next week!


ATB,

Mark.



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