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Commit 8a5248fe authored by Laszlo Ersek's avatar Laszlo Ersek Committed by Konrad Rzeszutek Wilk
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xen PV passthru: assign SR-IOV virtual functions to separate virtual slots 



VFs are reported as single-function devices in PCI_HEADER_TYPE, which
causes pci_scan_slot() in the PV domU to skip all VFs beyond #0 in the
pciback-provided slot. Avoid this by assigning each VF to a separate
virtual slot.

Acked-by: default avatarJan Beulich <jbeulich@suse.com>
Signed-off-by: default avatarLaszlo Ersek <lersek@redhat.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent e9d1aa05

drivers/xen/xen-pciback/vpci.c

+10 −4
Original line number Diff line number Diff line
@@ -89,9 +89,15 @@ static int __xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev, 


	mutex_lock(&vpci_dev->lock);



	/* Keep multi-function devices together on the virtual PCI bus */

	/*

	 * Keep multi-function devices together on the virtual PCI bus, except

	 * virtual functions.

	 */

	if (!dev->is_virtfn) {

		for (slot = 0; slot < PCI_SLOT_MAX; slot++) {

		if (!list_empty(&vpci_dev->dev_list[slot])) {

			if (list_empty(&vpci_dev->dev_list[slot]))

				continue;



			t = list_entry(list_first(&vpci_dev->dev_list[slot]),

				       struct pci_dev_entry, list);
@@ -116,7 +122,7 @@ static int __xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev, 
			       pci_name(dev), slot);

			list_add_tail(&dev_entry->list,

				      &vpci_dev->dev_list[slot]);

			func = PCI_FUNC(dev->devfn);

			func = dev->is_virtfn ? 0 : PCI_FUNC(dev->devfn);

			goto unlock;

		}

	}