drm/i915/gvt: refine mocs save restore policy

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Save and restore the mocs regs of one VM in GVT-g burning too much CPU
utilization. Add LRI command scan to monitor the change of mocs registers,
save the state in vreg, and use delta update policy to restore them.
It can obviously reduce the MMIO r/w count, and improve the performance
of context switch.

Signed-off-by: Weinan Li <weinan.z.li@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

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Weinan Li 2017-12-13 10:47:01 +08:00 • committed by Zhenyu Wang

parent e47107ad37

commit f402f2d6c3

2 changed files with 37 additions and 15 deletions

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19

drivers/gpu/drm/i915/gvt/cmd_parser.c

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33

drivers/gpu/drm/i915/gvt/mmio_context.c

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