From a34f83639490a5cc11a9d5c1b3773d4b6eb69a9e Mon Sep 17 00:00:00 2001 From: Min He Date: Thu, 6 Apr 2017 11:01:45 +0800 Subject: [PATCH] drm/i915/gvt: set the correct default value of CTX STATUS PTR 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@vger.kernel.org # v4.10+ Signed-off-by: Min He Signed-off-by: Zhenyu Wang --- 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 f1f426a97aa9..d186c157f65f 100644 --- a/drivers/gpu/drm/i915/gvt/execlist.c +++ b/drivers/gpu/drm/i915/gvt/execlist.c @@ -775,7 +775,8 @@ 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; } -- 2.20.1