From: Min He <min.he@xxxxxxxxx>
Fix wrong initial csb read pointer value. This fixes the random
engine timeout issue in guest when guest boots up.
Fixes: 8453d674ae7e ("drm/i915/gvt: vGPU execlist virtualization")
Cc: stable@xxxxxxxxxxxxxxx # v4.10+
Signed-off-by: Min He <min.he@xxxxxxxxx>
Signed-off-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gvt/execlist.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gvt/execlist.c b/drivers/gpu/drm/i915/gvt/execlist.c
index ce4276a7cf9c..536bde8638c8 100644
--- a/drivers/gpu/drm/i915/gvt/execlist.c
+++ b/drivers/gpu/drm/i915/gvt/execlist.c
@@ -776,7 +776,8 @@ static void init_vgpu_execlist(struct intel_vgpu *vgpu, int ring_id)
_EL_OFFSET_STATUS_PTR);
ctx_status_ptr.dw = vgpu_vreg(vgpu, ctx_status_ptr_reg);
- ctx_status_ptr.read_ptr = ctx_status_ptr.write_ptr = 0x7;
+ ctx_status_ptr.read_ptr = 0;
+ ctx_status_ptr.write_ptr = 0x7;
vgpu_vreg(vgpu, ctx_status_ptr_reg) = ctx_status_ptr.dw;
}
--
2.11.0