tree b6b6f5a0ea1c1699dc7bc10dfc3dab03268b2854
parent 7308b7bd678d408ee4c97ee78dd08d097ad45607
author Jan Beulich <jbeulich@suse.com> 1621354422 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1623321833 +0200

xen-pciback: redo VF placement in the virtual topology

The commit referenced below was incomplete: It merely affected what
would get written to the vdev-<N> xenstore node. The guest would still
find the function at the original function number as long as
__xen_pcibk_get_pci_dev() wouldn't be in sync. The same goes for AER wrt
__xen_pcibk_get_pcifront_dev().

Undo overriding the function to zero and instead make sure that VFs at
function zero remain alone in their slot. This has the added benefit of
improving overall capacity, considering that there's only a total of 32
slots available right now (PCI segment and bus can both only ever be
zero at present).

This is upstream commit 4ba50e7c423c29639878c00573288869aa627068.

Fixes: 8a5248fe10b1 ("xen PV passthru: assign SR-IOV virtual functions to 
separate virtual slots")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/8def783b-404c-3452-196d-3f3fd4d72c9e@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>