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1d1d0af679
Whenever, we unbind (or change fence registers) on an object, we must revoke any and all mmap_gtt using the previous bindings. Those user PTEs point at the GGTT which know points into a new object, the wrong object. Ergo, those PTEs must be cleared so that any user access provokes a new page fault. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com> Reviewed-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191107180601.30815-5-chris@chris-wilson.co.uk |
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