On Wed, 2017-09-27 at 06:52:31 UTC, Alexey Kardashevskiy wrote: > In order to make generic IOV code work, the physical function IOV BAR > should start from offset of the first VF. Since M64 segments share > PE number space across PHB, and some PEs may be in use at the time > when IOV is enabled, the existing code shifts the IOV BAR to the index > of the first PE/VF. This creates a hole in IOMEM space which can be > potentially taken by some other device. > > This reserves a temporary hole on a parent and releases it when IOV is > disabled; the temporary resources are stored in pci_dn to avoid > kmalloc/free. > > Cc: linux-pci@xxxxxxxxxxxxxxx > Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> > Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > Signed-off-by: Alexey Kardashevskiy <aik@xxxxxxxxx> > Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/d6f934fd48803d9e58040e2cbab2fe cheers
