gop driver and uos IGD driver will use
graphics stolen memory(gsm) when enable GVT-d.
This patch pass-thru gsm to uos gpu.
After set physical GPU gsm size 64MB in host BIOS:
Here is the steps:
(1) set gsm gpa(guest physical addrress) 0xDB000000;
(2) get gsm hpa(host physical addrress);
(3) build EPT mapping for gsm.
v1 -> v2:
* initialize the EPT mapping for passthrough GPU gsm region
in passthru_init instead of reading the BDSM config space
v2 -> v3:
* add EPT unmap when deinit
* change some micro name
Tracked-On: #4360
Signed-off-by: Junming Liu <junming.liu@intel.com>
Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>
Reviewed-by: Liu XinYun <xinyun.liu@intel.com>
Reviewed-by: Shuo A Liu <shuo.a.liu@intel.com>
Reviewed-by: Wu Binbin <binbin.wu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
4d882731ce