Re: [PATCH RFC] vhost: basic device IOTLB support

2016-01-05 Thread Jason Wang
On 01/05/2016 11:18 AM, Yang Zhang wrote: > On 2016/1/4 14:22, Jason Wang wrote: >> >> >> On 01/04/2016 09:39 AM, Yang Zhang wrote: >>> On 2015/12/31 15:13, Jason Wang wrote: This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace

Re: [PATCH RFC] vhost: basic device IOTLB support

2016-01-04 Thread Yang Zhang
On 2016/1/4 14:22, Jason Wang wrote: On 01/04/2016 09:39 AM, Yang Zhang wrote: On 2015/12/31 15:13, Jason Wang wrote: This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace(qemu) implementation of iommu for a secure DMA environment in

Re: [PATCH RFC] vhost: basic device IOTLB support

2016-01-03 Thread Jason Wang
On 01/04/2016 09:39 AM, Yang Zhang wrote: > On 2015/12/31 15:13, Jason Wang wrote: >> This patch tries to implement an device IOTLB for vhost. This could be >> used with for co-operation with userspace(qemu) implementation of >> iommu for a secure DMA environment in guest. >> >> The idea is simpl

Re: [PATCH RFC] vhost: basic device IOTLB support

2016-01-03 Thread Jason Wang
On 12/31/2015 07:17 PM, Michael S. Tsirkin wrote: > On Thu, Dec 31, 2015 at 03:13:45PM +0800, Jason Wang wrote: >> This patch tries to implement an device IOTLB for vhost. This could be >> used with for co-operation with userspace(qemu) implementation of >> iommu for a secure DMA environment in g

Re: [PATCH RFC] vhost: basic device IOTLB support

2016-01-03 Thread Yang Zhang
On 2015/12/31 15:13, Jason Wang wrote: This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace(qemu) implementation of iommu for a secure DMA environment in guest. The idea is simple. When vhost meets an IOTLB miss, it will request the ass

Re: [PATCH RFC] vhost: basic device IOTLB support

2015-12-31 Thread Michael S. Tsirkin
On Thu, Dec 31, 2015 at 03:13:45PM +0800, Jason Wang wrote: > This patch tries to implement an device IOTLB for vhost. This could be > used with for co-operation with userspace(qemu) implementation of > iommu for a secure DMA environment in guest. > > The idea is simple. When vhost meets an IOTLB

[PATCH RFC] vhost: basic device IOTLB support

2015-12-30 Thread Jason Wang
This patch tries to implement an device IOTLB for vhost. This could be used with for co-operation with userspace(qemu) implementation of iommu for a secure DMA environment in guest. The idea is simple. When vhost meets an IOTLB miss, it will request the assistance of userspace to do the translatio