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dm:passthrough graphics stolen memory to uos gpu

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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>
This commit is contained in:
Junming Liu
2020-01-10 22:21:20 +00:00
committed by wenlingz
parent f9f64d356f
commit 4d882731ce
3 changed files with 30 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
devicemodel/include/pcireg.h
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@@ -1066,6 +1066,6 @@
#define PCIM_OSC_CTL_PCIE_CAP_STRUCT 0x10 /* Various Capability Structures */
/* Graphics definitions */
#define PCIR_GMCH_CTL 0x50 /*GMCH grpahics control register */
#define PCIM_GMCH_CTL_GMS 0xFF00 /*GMS - stolen memory bits 15:8 */
#define PCIR_BDSM 0x5C /* BDSM graphics base data of stolen memory register */
#define PCIM_BDSM_GSM_MASK 0xFFF00000 /* bits 31:20 contains the base address of stolen memory */
#endif