On 2016/1/27 8:06, Jike Song wrote:
On 01/26/2016 10:05 PM, Yang Zhang wrote:
On 2016/1/26 15:41, Jike Song wrote:
We will need to extend:
- VFIO_DEVICE_GET_REGION_INFO
a) adding a flag: DONT_MAP. For example, the MMIO of vgpu
should be trapped instead of being mmap-ed.
I may not in the context, but i am curious how to handle the DONT_MAP in
vfio driver? Since there are no real MMIO maps into the region and i
suppose the access to the region should be handled by vgpu in i915
driver, but currently most of the mmio accesses are handled by Qemu.
Hi Yang,
MMIO accesses are supposed to be handled in kernel, without vm-exiting
to QEMU, similar to in-kernel irqchip :)
The question is current vfio doesn't support it. The long discussion
between Alex and Kevin is what i am to understand how KVMGT works under
vfio framework.
--
best regards
yang
