| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.10 51/69] drm/i915/gvt: set the correct default value of CTX STATUS PTR | Date | Wed, 19 Apr 2017 16:37:20 +0200 |
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4.10-stable review patch. If anyone has any objections, please let me know.
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From: Min He <min.he@intel.com>
commit a34f83639490a5cc11a9d5c1b3773d4b6eb69a9e upstream.
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") Signed-off-by: Min He <min.he@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/gpu/drm/i915/gvt/execlist.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/gvt/execlist.c +++ b/drivers/gpu/drm/i915/gvt/execlist.c @@ -778,7 +778,8 @@ static void init_vgpu_execlist(struct in _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; }
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