Re: [Qemu-devel] [RFC PATCH 00/10] spapr: vfio: Enable Dynamic DMA windows (DDW)

2014-08-10 Thread Alexey Kardashevskiy
On 08/05/2014 11:30 AM, Alexey Kardashevskiy wrote: > On 07/31/2014 07:34 PM, Alexey Kardashevskiy wrote: >> At the moment sPAPR PHB supports only a single 32bit window >> which is normally 1..2GB which is not enough for high performance devices. >> >> PAPR spec enables creating an additional windo

Re: [Qemu-devel] [RFC PATCH 00/10] spapr: vfio: Enable Dynamic DMA windows (DDW)

2014-08-04 Thread Alexey Kardashevskiy
On 07/31/2014 07:34 PM, Alexey Kardashevskiy wrote: > At the moment sPAPR PHB supports only a single 32bit window > which is normally 1..2GB which is not enough for high performance devices. > > PAPR spec enables creating an additional window(s) to support 64bit > DMA and bigger page sizes. > > T

[Qemu-devel] [RFC PATCH 00/10] spapr: vfio: Enable Dynamic DMA windows (DDW)

2014-07-31 Thread Alexey Kardashevskiy
At the moment sPAPR PHB supports only a single 32bit window which is normally 1..2GB which is not enough for high performance devices. PAPR spec enables creating an additional window(s) to support 64bit DMA and bigger page sizes. This patchset adds DDW support for pseries. The host kernel changes