diff options
| author | Laszlo Ersek <lersek@redhat.com> | 2012-10-17 11:55:55 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-10-19 15:17:47 -0400 |
| commit | 8a5248fe10b101104d92d01438f918e899414fd1 (patch) | |
| tree | a995ee103e16708cc393fcf11f6bdef07de9adb7 /drivers/xen | |
| parent | e9d1aa05da264cf7e1906b81a90d6abfdbe3700b (diff) | |
| download | lwn-8a5248fe10b101104d92d01438f918e899414fd1.tar.gz lwn-8a5248fe10b101104d92d01438f918e899414fd1.zip | |
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: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/xen-pciback/vpci.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/xen/xen-pciback/vpci.c b/drivers/xen/xen-pciback/vpci.c index 46d140baebd8..0f478ac483cd 100644 --- a/drivers/xen/xen-pciback/vpci.c +++ b/drivers/xen/xen-pciback/vpci.c @@ -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 */ - for (slot = 0; slot < PCI_SLOT_MAX; slot++) { - if (!list_empty(&vpci_dev->dev_list[slot])) { + /* + * 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])) + 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; } } |