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| /linux/drivers/gpu/drm/i915/gem/ |
| H A D | i915_gem_userptr.c | diff 63430347713a5ba48617687cc8b2aa1f01514432 Mon Oct 18 19:45:04 CEST 2021 Matthew Auld <matthew.auld@intel.com> drm/i915/userptr: add paranoid flush-on-acquire
Even though userptr objects are always coherent with the GPU, with no
way for userspace to change this with the set_caching ioctl, even on
non-LLC platforms, there is still the 'Bypass LCC' mocs setting, which
might permit reading the contents of main memory directly.
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211018174508.2137279-5-matthew.auld@intel.com
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