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register_vga_regions
2011 Nov 27
5
[PATCH] qemu-xen: Intel GPU passthrough, fix OpRegion mapping.
The OpRegion shouldn''t be mapped 1:1 because the address in the host
can''t be used in the guest directly.
This patch traps read and write access to the opregion of the Intel
GPU config space (offset 0xfc).
To work correctly this patch needs a change in hvmloader.
HVMloader will allocate 2 pages for the OpRegion and write this address
on the config space of the Intel GPU. Qemu