On 8/12/2014 2:48 PM, Gavin Shan wrote: > The VFIO driver is routing LSI interrupts by capturing, masking, > and then delivering. When passing though Mellanox 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. > > # lspci | grep Mellanox > 0001:05:00.0 Ethernet controller: Mellanox Technologies MT27500 \ > Family [ConnectX-3] > 0005:01:00.0 Ethernet controller: Mellanox Technologies MT26448 \ > [ConnectX EN 10GigE, PCIe 2.0 5GT/s] (rev b0) > > It's confirmed by Amir Vadai that all Mellanox devices have same > problem. The patch marks broken INTx masking for all Mellanox > adapters. > > Cc: Amir Vadai <amirv@xxxxxxxxxxxx> > Suggested-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx> > --- > v3: Mark broken INTx masking for all Mellanox adapters > --- > drivers/pci/quirks.c | 2 ++ > 1 file changed, 2 insertions(+) > Acked-By: Amir Vadai <amirv@xxxxxxxxxxxx> -- 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
