Re: Purpose of translate MSI interrupt into INTx for guest passthrough

2021-01-14 Thread Roger Pau Monné
On Wed, Jan 13, 2021 at 09:00:47PM +, Andrew Cooper wrote: > On 12/01/2021 15:51, Roger Pau Monné wrote: > > On Tue, Jan 12, 2021 at 09:48:17AM -0500, Jason Andryuk wrote: > >> On Tue, Jan 12, 2021 at 9:25 AM Roger Pau Monné > >> wrote: > >>> Dropping Qing He as this address bounces. > >>> >

Re: Purpose of translate MSI interrupt into INTx for guest passthrough

2021-01-13 Thread Andrew Cooper
On 12/01/2021 15:51, Roger Pau Monné wrote: > On Tue, Jan 12, 2021 at 09:48:17AM -0500, Jason Andryuk wrote: >> On Tue, Jan 12, 2021 at 9:25 AM Roger Pau Monné wrote: >>> Dropping Qing He as this address bounces. >>> >>> On Tue, Jan 12, 2021 at 03:10:57PM +0100, Roger Pau Monné wrote: Hello,

Re: Purpose of translate MSI interrupt into INTx for guest passthrough

2021-01-12 Thread Roger Pau Monné
On Tue, Jan 12, 2021 at 09:48:17AM -0500, Jason Andryuk wrote: > On Tue, Jan 12, 2021 at 9:25 AM Roger Pau Monné wrote: > > > > Dropping Qing He as this address bounces. > > > > On Tue, Jan 12, 2021 at 03:10:57PM +0100, Roger Pau Monné wrote: > > > Hello, > > > > > > While trying to do some cleanu

Re: Purpose of translate MSI interrupt into INTx for guest passthrough

2021-01-12 Thread Jason Andryuk
On Tue, Jan 12, 2021 at 9:25 AM Roger Pau Monné wrote: > > Dropping Qing He as this address bounces. > > On Tue, Jan 12, 2021 at 03:10:57PM +0100, Roger Pau Monné wrote: > > Hello, > > > > While trying to do some cleanup of the Xen interrupt support for pci > > pass though I came across the MSI to

Re: Purpose of translate MSI interrupt into INTx for guest passthrough

2021-01-12 Thread Roger Pau Monné
Dropping Qing He as this address bounces. On Tue, Jan 12, 2021 at 03:10:57PM +0100, Roger Pau Monné wrote: > Hello, > > While trying to do some cleanup of the Xen interrupt support for pci > pass though I came across the MSI to INTx translation that Xen is in > theory capable of performing (ie: u

Purpose of translate MSI interrupt into INTx for guest passthrough

2021-01-12 Thread Roger Pau Monné
Hello, While trying to do some cleanup of the Xen interrupt support for pci pass though I came across the MSI to INTx translation that Xen is in theory capable of performing (ie: use a physical MSI interrupt source and inject that as an INTx to a guest). AFAICT such functionality is not wired up