On Thu, Jul 31, 2014 at 10:06:30PM -0600, Alex Williamson wrote: >On Fri, 2014-08-01 at 13:51 +1000, Gavin Shan wrote: >> The VFIO driver is routing LSI interrupts by capturing, masking, >> and then delivering. When passing though Mallanox adapters from >> host to guest, interrupt storm was reported from host and guest. >> That's because we can't mask the LSI interrupt with help of PCI >> command register. >> >> The patch marks broken INTx masking for Mellanox devices so that >> the VFIO driver will always mask the interrupt from interrupt >> controller side to avoid interrupt storm. >> >> Suggested-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> >> Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx> >> --- >> drivers/pci/quirks.c | 4 ++++ >> 1 file changed, 4 insertions(+) >> >> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c >> index d0f6926..8c2b96f 100644 >> --- a/drivers/pci/quirks.c >> +++ b/drivers/pci/quirks.c >> @@ -2977,6 +2977,10 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CHELSIO, 0x0030, >> quirk_broken_intx_masking); >> DECLARE_PCI_FIXUP_HEADER(0x1814, 0x0601, /* Ralink RT2800 802.11n PCI */ >> quirk_broken_intx_masking); >> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MELLANOX, 0x1003, >> + quirk_broken_intx_masking); >> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MELLANOX, 0x6750, >> + quirk_broken_intx_masking); >> /* >> * Realtek RTL8169 PCI Gigabit Ethernet Controller (rev 10) >> * Subsystem: Realtek RTL8169/8110 Family PCI Gigabit Ethernet NIC > >Is there an lspci description for the devices that we can also include? >You might also want to cc the driver maintainers to see if they're aware >or have any comments. Thanks, > Yes, I'll include that in next revision and cc driver's maintainer. Thanks, Gavin -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
