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drm/i915: Explicitly mark Global GTT address spaces

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So far we have been relying on vm->file pointer being NULL to declare
something GGTT.

This has the unfortunate consequence that the default kernel context is
also declared GGTT and interferes with the following patch which wants to
instantiate VMA's and execute requests against the kernel context.

Change the is_ggtt test to use an explicit flag in struct address_space to
solve this issue.

Note that the bit used is free since there is an alignment hole in the
struct.

v2:
 * Mark mock ggtt.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180831143643.12366-1-tvrtko.ursulin@linux.intel.com
This commit is contained in:
Tvrtko Ursulin
2018-08-31 15:36:43 +01:00
committed by Chris Wilson
parent 2b5cf4ef54
commit 48e905048f
3 changed files with 8 additions and 1 deletions
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2
drivers/gpu/drm/i915/selftests/mock_gtt.c
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@@ -118,6 +118,8 @@ void mock_init_ggtt(struct drm_i915_private *i915)
ggtt->vm.vma_ops.clear_pages = clear_pages;
i915_address_space_init(&ggtt->vm, i915);
ggtt->vm.is_ggtt = true;
}
void mock_fini_ggtt(struct drm_i915_private *i915)