Re: [PATCH kernel 1/3] vfio_pci: Allow mapping extra regions

2018-11-07 Thread David Gibson
On Mon, Oct 15, 2018 at 08:42:31PM +1100, Alexey Kardashevskiy wrote: 65;5402;1c> So far we only allowed mapping of MMIO BARs to the userspace. However > there there are GPUs with on-board coherent RAM accessible via side > channels which we also want to map to the userspace. The first client > fo

[PATCH kernel 1/3] vfio_pci: Allow mapping extra regions

2018-10-15 Thread Alexey Kardashevskiy
So far we only allowed mapping of MMIO BARs to the userspace. However there there are GPUs with on-board coherent RAM accessible via side channels which we also want to map to the userspace. The first client for this is NVIDIA V100 GPU with NVLink2 direct links to a POWER9 NPU-enabled CPU; such GPU