Re: [Qemu-devel] [PATCH] fix MSI injection on Xen

2016-01-05 Thread Stefano Stabellini
On Fri, 18 Dec 2015, Stefano Stabellini wrote: > On Wed, 2 Dec 2015, Michael S. Tsirkin wrote: > > On Wed, Dec 02, 2015 at 05:16:18PM +, Stefano Stabellini wrote: > > > On Wed, 2 Dec 2015, Michael S. Tsirkin wrote: > > > > On Wed, Dec 02, 2015 at 04:56:21PM +, Stefano Stabellini wrote: > >

Re: [Qemu-devel] [PATCH] fix MSI injection on Xen

2015-12-18 Thread Stefano Stabellini
On Wed, 2 Dec 2015, Michael S. Tsirkin wrote: > On Wed, Dec 02, 2015 at 05:16:18PM +, Stefano Stabellini wrote: > > On Wed, 2 Dec 2015, Michael S. Tsirkin wrote: > > > On Wed, Dec 02, 2015 at 04:56:21PM +, Stefano Stabellini wrote: > > > > On Xen MSIs can be remapped into pirqs, which are

[Qemu-devel] [PATCH] fix MSI injection on Xen

2015-12-02 Thread Stefano Stabellini
On Xen MSIs can be remapped into pirqs, which are a type of event channels. It's mostly for the benefit of PCI passthrough devices, to avoid the overhead of interacting with the emulated lapic. However remapping interrupts and MSIs is also supported for emulated devices, such as the e1000 and

Re: [Qemu-devel] [PATCH] fix MSI injection on Xen

2015-12-02 Thread Michael S. Tsirkin
On Wed, Dec 02, 2015 at 05:16:18PM +, Stefano Stabellini wrote: > On Wed, 2 Dec 2015, Michael S. Tsirkin wrote: > > On Wed, Dec 02, 2015 at 04:56:21PM +, Stefano Stabellini wrote: > > > On Xen MSIs can be remapped into pirqs, which are a type of event > > > channels. It's mostly for the

Re: [Qemu-devel] [PATCH] fix MSI injection on Xen

2015-12-02 Thread Stefano Stabellini
On Wed, 2 Dec 2015, Michael S. Tsirkin wrote: > On Wed, Dec 02, 2015 at 04:56:21PM +, Stefano Stabellini wrote: > > On Xen MSIs can be remapped into pirqs, which are a type of event > > channels. It's mostly for the benefit of PCI passthrough devices, to > > avoid the overhead of interacting

Re: [Qemu-devel] [PATCH] fix MSI injection on Xen

2015-12-02 Thread Michael S. Tsirkin
On Wed, Dec 02, 2015 at 04:56:21PM +, Stefano Stabellini wrote: > On Xen MSIs can be remapped into pirqs, which are a type of event > channels. It's mostly for the benefit of PCI passthrough devices, to > avoid the overhead of interacting with the emulated lapic. > > However remapping