On Thu, Jan 20, 2011 at 03:57:39PM +0900, Isaku Yamahata wrote:
> make pci_find_device() ARI aware.
>
> Signed-off-by: Isaku Yamahata <yamah...@valinux.co.jp>
> ---
> hw/pci.c | 7 +++++++
> 1 files changed, 7 insertions(+), 0 deletions(-)
>
> diff --git a/hw/pci.c b/hw/pci.c
> index 8d0e3df..851f350 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -1596,11 +1596,18 @@ PCIBus *pci_find_bus(PCIBus *bus, int bus_num)
>
> PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int slot, int function)
> {
> + PCIDevice *d;
> bus = pci_find_bus(bus, bus_num);
>
> if (!bus)
> return NULL;
>
> + d = bus->parent_dev;
> + if (d && pci_is_express(d) &&
> + pcie_cap_get_type(d) == PCI_EXP_TYPE_DOWNSTREAM &&
> + !pcie_cap_is_ari_enabled(d) && slot > 0) {
> + return NULL;
> + }
> return bus->devices[PCI_DEVFN(slot, function)];
> }
I'd like to split this express-specific code out in some way.
Further, the downstream port always has a single slot.
Maybe it shouldn't be a bus at all, but this needs some thought.
How about we put flag in PCIBus that says that a single
slot is supported? Downstream ports would just set it.
> --
> 1.7.1.1
