Re: [dpdk-dev] [PATCH] vfio: Include No-IOMMU mode

2015-12-02 Thread Michael S. Tsirkin
On Wed, Dec 02, 2015 at 05:19:18PM +0100, Thomas Monjalon wrote: > Hi, > > 2015-12-02 08:28, Alex Williamson: > > On Mon, 2015-11-16 at 19:12 +0200, Avi Kivity wrote: > > > On 11/16/2015 07:06 PM, Alex Williamson wrote: > > > > FYI, this is now in v4.4-rc1 (the slightly modified v2 version). I wa

Re: [dpdk-dev] [PATCH] vfio: Include No-IOMMU mode

2015-12-02 Thread Thomas Monjalon
Hi, 2015-12-02 08:28, Alex Williamson: > On Mon, 2015-11-16 at 19:12 +0200, Avi Kivity wrote: > > On 11/16/2015 07:06 PM, Alex Williamson wrote: > > > FYI, this is now in v4.4-rc1 (the slightly modified v2 version). I want > > > to give fair warning though that while we seem to agree on this idea

Re: [PATCH] vfio: Include No-IOMMU mode

2015-12-02 Thread Alex Williamson
On Mon, 2015-11-16 at 19:12 +0200, Avi Kivity wrote: > On 11/16/2015 07:06 PM, Alex Williamson wrote: > > On Wed, 2015-10-28 at 15:21 -0600, Alex Williamson wrote: > >> There is really no way to safely give a user full access to a DMA > >> capable device without an IOMMU to protect the host system.

Re: [PATCH] vfio: Include No-IOMMU mode

2015-11-16 Thread Avi Kivity
On 11/16/2015 07:06 PM, Alex Williamson wrote: On Wed, 2015-10-28 at 15:21 -0600, Alex Williamson wrote: There is really no way to safely give a user full access to a DMA capable device without an IOMMU to protect the host system. There is also no way to provide DMA translation, for use cases s

Re: [PATCH] vfio: Include No-IOMMU mode

2015-11-16 Thread Alex Williamson
On Wed, 2015-10-28 at 15:21 -0600, Alex Williamson wrote: > There is really no way to safely give a user full access to a DMA > capable device without an IOMMU to protect the host system. There is > also no way to provide DMA translation, for use cases such as device > assignment to virtual machin

Re: [PATCH] vfio: Include No-IOMMU mode

2015-10-28 Thread Michael S. Tsirkin
On Wed, Oct 28, 2015 at 03:21:45PM -0600, Alex Williamson wrote: > There is really no way to safely give a user full access to a DMA > capable device without an IOMMU to protect the host system. There is > also no way to provide DMA translation, for use cases such as device > assignment to virtual

[PATCH] vfio: Include No-IOMMU mode

2015-10-28 Thread Alex Williamson
There is really no way to safely give a user full access to a DMA capable device without an IOMMU to protect the host system. There is also no way to provide DMA translation, for use cases such as device assignment to virtual machines. However, there are still those users that want userspace driv