Re: [Qemu-devel] [PATCH] vfio-pci: Fix Nvidia MSI ACK through 0x88000 quirk

2013-11-11 Thread Dave Airlie
On Tue, Nov 12, 2013 at 8:32 AM, Alex Williamson wrote: > On Tue, 2013-11-12 at 07:55 +1000, Dave Airlie wrote: >> On Tue, Nov 12, 2013 at 7:43 AM, Alex Williamson >> wrote: >> > When MSI is enabled on Nvidia GeForce cards the driver seems to >> > acknowledge the interrupt by writing a 0xff byte

Re: [Qemu-devel] [PATCH] vfio-pci: Fix Nvidia MSI ACK through 0x88000 quirk

2013-11-11 Thread Alex Williamson
On Tue, 2013-11-12 at 07:55 +1000, Dave Airlie wrote: > On Tue, Nov 12, 2013 at 7:43 AM, Alex Williamson > wrote: > > When MSI is enabled on Nvidia GeForce cards the driver seems to > > acknowledge the interrupt by writing a 0xff byte to the MSI capability > > ID register using the PCI config spac

Re: [Qemu-devel] [PATCH] vfio-pci: Fix Nvidia MSI ACK through 0x88000 quirk

2013-11-11 Thread Dave Airlie
On Tue, Nov 12, 2013 at 7:43 AM, Alex Williamson wrote: > When MSI is enabled on Nvidia GeForce cards the driver seems to > acknowledge the interrupt by writing a 0xff byte to the MSI capability > ID register using the PCI config space mirror at offset 0x88000 from > BAR0. Without this, the devic

[Qemu-devel] [PATCH] vfio-pci: Fix Nvidia MSI ACK through 0x88000 quirk

2013-11-11 Thread Alex Williamson
When MSI is enabled on Nvidia GeForce cards the driver seems to acknowledge the interrupt by writing a 0xff byte to the MSI capability ID register using the PCI config space mirror at offset 0x88000 from BAR0. Without this, the device will only fire a single interrupt. VFIO handles the PCI capabil