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drm/i915/gvt: use cmd to restore in-context mmios to hw for gen9 platform

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for restore-inhibit context, hardware will not load in-context mmios
(engine context part) to hardware, but hardware will save the mmio
values in hardware back to context image. So, in order to save correct
values of vGPU back to context image, values of vGPU mmios have to be
loaded into hardware first for restore-inhibit context.

In this patch, the mechanism is applied to all gen9 platform.

The reason excluding gen8 platforms is only because of lacking of testing
on those platforms.

v3: for mocs registers, goto in-context mmios save-restore path for skl
platform as well (weinan li)
v2: update vreg when scanning indirect context for inhibit context for
gen9

Cc: Weinan Li <weinan.z.li@intel.com>
Acked-by: Weinan Li <weinan.z.li@intel.com>
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Yan Zhao
2019-05-07 22:14:04 -04:00
committed by Zhenyu Wang
parent a8c2d5ab9e
commit df2ea3c296
3 changed files with 13 additions and 15 deletions
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4
drivers/gpu/drm/i915/gvt/scheduler.c
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@@ -300,9 +300,7 @@ static int copy_workload_to_ring_buffer(struct intel_vgpu_workload *workload)
u32 *cs;
int err;
if ((IS_KABYLAKE(req->i915) || IS_BROXTON(req->i915)
|| IS_COFFEELAKE(req->i915))
&& is_inhibit_context(req->hw_context))
if (IS_GEN(req->i915, 9) && is_inhibit_context(req->hw_context))
intel_vgpu_restore_inhibit_context(vgpu, req);
/*