This is just an update if you are interested in the outcome. I turns
out that my MTRR (Memory Type Range Register) configuration does not
take effect so that the shared memory region is always uncachable. My
shared memory is located at 0xf24, and the MTRR settings are
below:
> cat /proc/mtrr
r
Hi Folks,
I'm using PCI device pass-through to pass a network device to a VM.
Since one of my additional requirements is to share a memory between
VM and host, I pre-allocate a memory at host (say physaddr: 0x100) and
put this address into the BAR2 of the network device's pci
configuration space.
