tree 8c875220d6deca0c44c975c3271d4f77f0e17dcb
parent 42882336e62aab00278114392a16374f272a0c99
author Chris Wilson <chris@chris-wilson.co.uk> 1540834165 +0000
committer Chris Wilson <chris@chris-wilson.co.uk> 1540836925 +0000

drm/i915/selftests: Test vm isolation

The vm of two contexts are supposed to be independent, such that a stray
write by one cannot be detected by another. Normally the GTT is filled
explicitly by userspace, but the space in between objects is filled with
a scratch page -- and that scratch page should not be able to form an
inter-context backchannel.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181029172925.10159-1-chris@chris-wilson.co.uk