On 2/10/22 13:13, Matthew Auld wrote:
On platforms where there might be non-mappable LMEM, force userspace to
mark the buffers with the correct hint. When dumping the BO contents
during capture we need CPU access. Note this only applies to buffers
that can be placed in LMEM, and also doesn't impact DG1.
v2(Reported-by: kernel test robot <lkp@xxxxxxxxx>):
- Also update the function signature on !CONFIG_DRM_I915_CAPTURE_ERROR
builds.
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 498b458fd784..017f928cbcaf 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -1965,7 +1965,7 @@ eb_find_first_request_added(struct i915_execbuffer *eb)
#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
/* Stage with GFP_KERNEL allocations before we enter the signaling critical path */
-static void eb_capture_stage(struct i915_execbuffer *eb)
+static int eb_capture_stage(struct i915_execbuffer *eb)
{
const unsigned int count = eb->buffer_count;
unsigned int i = count, j;
@@ -1978,6 +1978,9 @@ static void eb_capture_stage(struct i915_execbuffer *eb)
if (!(flags & EXEC_OBJECT_CAPTURE))
continue;
+ if (vma->obj->flags & I915_BO_ALLOC_GPU_ONLY)
+ return -EINVAL;
With suitable adjustment regarding how we define the ALLOC_GPU_ONLY flag..
/Thomas
