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drm/i915/gvt: Fix shadow context descriptor 

We need to be careful to only update addr mode for gvt shadow context
descriptor but keep other valid config. This fixes GPU hang caused by
invalid descriptor submitted for gvt workload.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Zhenyu Wang 2017-02-13 17:07:19 +08:00
parent 5b3cac1916
commit 03806edc35
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/gvt/scheduler.c
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@ -169,7 +169,8 @@ static int dispatch_workload(struct intel_vgpu_workload *workload)
gvt_dbg_sched("ring id %d prepare to dispatch workload %p\n",
ring_id, workload);
shadow_ctx->desc_template = workload->ctx_desc.addressing_mode <<
shadow_ctx->desc_template &= ~(0x3 << GEN8_CTX_ADDRESSING_MODE_SHIFT);
shadow_ctx->desc_template |= workload->ctx_desc.addressing_mode <<
GEN8_CTX_ADDRESSING_MODE_SHIFT;
mutex_lock(&dev_priv->drm.struct_mutex);