Re: [RFC PATCHv2 0/3] Support for nesting IOMMUs in VFIO

2014-07-14 Thread Will Deacon
On Thu, Jul 10, 2014 at 05:14:05PM +0100, Alex Williamson wrote: > On Thu, 2014-07-10 at 16:45 +0100, Will Deacon wrote: > > On Thu, Jul 10, 2014 at 04:38:18PM +0100, Alex Williamson wrote: > > > On Thu, 2014-07-10 at 12:34 +0100, Will Deacon wrote: > > > > Do you think that returning something lik

Re: [RFC PATCHv2 0/3] Support for nesting IOMMUs in VFIO

2014-07-10 Thread Alex Williamson
On Thu, 2014-07-10 at 16:45 +0100, Will Deacon wrote: > On Thu, Jul 10, 2014 at 04:38:18PM +0100, Alex Williamson wrote: > > On Thu, 2014-07-10 at 12:34 +0100, Will Deacon wrote: > > > On Wed, Jul 09, 2014 at 09:37:15PM +0100, Alex Williamson wrote: > > > > On Wed, 2014-07-09 at 19:28 +0100, Will D

Re: [RFC PATCHv2 0/3] Support for nesting IOMMUs in VFIO

2014-07-10 Thread Will Deacon
On Thu, Jul 10, 2014 at 04:38:18PM +0100, Alex Williamson wrote: > On Thu, 2014-07-10 at 12:34 +0100, Will Deacon wrote: > > On Wed, Jul 09, 2014 at 09:37:15PM +0100, Alex Williamson wrote: > > > On Wed, 2014-07-09 at 19:28 +0100, Will Deacon wrote: > > > > Hello, > > > > > > > > This is v2 of the

Re: [RFC PATCHv2 0/3] Support for nesting IOMMUs in VFIO

2014-07-10 Thread Alex Williamson
On Thu, 2014-07-10 at 12:34 +0100, Will Deacon wrote: > Hey Alex, > > On Wed, Jul 09, 2014 at 09:37:15PM +0100, Alex Williamson wrote: > > On Wed, 2014-07-09 at 19:28 +0100, Will Deacon wrote: > > > Hello, > > > > > > This is v2 of the RFC I originally posted here: > > > > > > RFCv1: http://per

Re: [RFC PATCHv2 0/3] Support for nesting IOMMUs in VFIO

2014-07-10 Thread Will Deacon
Hey Alex, On Wed, Jul 09, 2014 at 09:37:15PM +0100, Alex Williamson wrote: > On Wed, 2014-07-09 at 19:28 +0100, Will Deacon wrote: > > Hello, > > > > This is v2 of the RFC I originally posted here: > > > > RFCv1: http://permalink.gmane.org/gmane.linux.kernel.iommu/5552 > > > > It's changed sig

Re: [RFC PATCHv2 0/3] Support for nesting IOMMUs in VFIO

2014-07-09 Thread Alex Williamson
On Wed, 2014-07-09 at 19:28 +0100, Will Deacon wrote: > Hello, > > This is v2 of the RFC I originally posted here: > > RFCv1: http://permalink.gmane.org/gmane.linux.kernel.iommu/5552 > > It's changed significantly since then, based on helpful feedback from > Alex. In particular, I no longer but

[RFC PATCHv2 0/3] Support for nesting IOMMUs in VFIO

2014-07-09 Thread Will Deacon
Hello, This is v2 of the RFC I originally posted here: RFCv1: http://permalink.gmane.org/gmane.linux.kernel.iommu/5552 It's changed significantly since then, based on helpful feedback from Alex. In particular, I no longer butcher the IOMMU API, instead making use of a new iommu_attr to indicate