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drm/i915/gvt: update RING_START reg of vGPU when the context is submitted to i915

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The guest may use this register to identify the running state of one
context. Emulate it as the value in context image as if the context runs
on the GPU hardware.

Signed-off-by: Weinan Li <weinan.z.li@intel.com>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Weinan Li 2019-09-02 13:57:59 +08:00 committed by Zhenyu Wang
parent 0a3242bdb4
commit 4a5322560a
1 changed files with 17 additions and 0 deletions
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17
drivers/gpu/drm/i915/gvt/scheduler.c
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@ -573,6 +573,16 @@ static int prepare_shadow_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx)
return 0;
}
static void update_vreg_in_ctx(struct intel_vgpu_workload *workload)
{
struct intel_vgpu *vgpu = workload->vgpu;
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
u32 ring_base;
ring_base = dev_priv->engine[workload->ring_id]->mmio_base;
vgpu_vreg_t(vgpu, RING_START(ring_base)) = workload->rb_start;
}
static void release_shadow_batch_buffer(struct intel_vgpu_workload *workload)
{
struct intel_vgpu *vgpu = workload->vgpu;
@ -1002,6 +1012,13 @@ static int workload_thread(void *priv)
if (need_force_wake)
intel_uncore_forcewake_get(&gvt->dev_priv->uncore,
FORCEWAKE_ALL);
/*
* Update the vReg of the vGPU which submitted this
* workload. The vGPU may use these registers for checking
* the context state. The value comes from GPU commands
* in this workload.
*/
update_vreg_in_ctx(workload);
ret = dispatch_workload(workload);