Re: [PATCH kernel v11 32/34] powerpc/mmu: Add userspace-to-physical addresses translation cache

2015-06-01 Thread David Gibson
On Fri, May 29, 2015 at 06:44:56PM +1000, Alexey Kardashevskiy wrote: We are adding support for DMA memory pre-registration to be used in conjunction with VFIO. The idea is that the userspace which is going to run a guest may want to pre-register a user space memory region so it all gets

[PATCH kernel v11 32/34] powerpc/mmu: Add userspace-to-physical addresses translation cache

2015-05-29 Thread Alexey Kardashevskiy
We are adding support for DMA memory pre-registration to be used in conjunction with VFIO. The idea is that the userspace which is going to run a guest may want to pre-register a user space memory region so it all gets pinned once and never goes away. Having this done, a hypervisor will not have