Chris Wilson 0f46daa1a2 drm/i915: Force CPU synchronisation even if userspace requests ASYNC ... The goal here was to minimise doing any thing or any check inside the kernel that was not strictly required. For a userspace that assumes complete control over the cache domains, the kernel is usually using outdated information and may trigger clflushes where none were required. However, swapping is a situation where userspace has no knowledge of the domain transfer, and will leave the object in the CPU cache. The kernel must flush this out to the backing storage prior to use with the GPU. As we use an asynchronous task tracked by an implicit fence for this, we also need to cancel the ASYNC flag on the object so that the object will wait for the clflush to complete before being executed. This also absolves userspace of the responsibility imposed by commit 77ae995789 ("drm/i915: Enable userspace to opt-out of implicit fencing") that its needed to ensure that the object was out of the CPU cache prior to use on the GPU. Fixes: 77ae995789 ("drm/i915: Enable userspace to opt-out of implicit fencing") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101571 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Jason Ekstrand <jason@jlekstrand.net> Reviewed-by: Jason Ekstrand <jason@jlekstrand.net> Link: https://patchwork.freedesktop.org/patch/msgid/20170721145037.25105-5-chris@chris-wilson.co.uk Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>		2017-07-27 09:39:00 +02:00
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drm	drm/i915: Force CPU synchronisation even if userspace requests ASYNC	2017-07-27 09:39:00 +02:00
host1x	Linux 4.12-rc7	2017-06-27 08:28:30 +10:00
ipu-v3	drm: Convert to using %pOF instead of full_name	2017-07-26 13:45:06 +02:00
vga	sched/wait: Rename wait_queue_t => wait_queue_entry_t	2017-06-20 12:18:27 +02:00
Makefile	…