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drm/i915: add a context parameter to {en, dis}able zero address mapping

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Export a new context parameter that can be set/queried through the
context_{get,set}param ioctls.  This parameter is passed as a context
flag and decides whether or not a GPU address mapping is allowed to
be made at address zero.  The default is to allow such mappings.

Signed-off-by: David Weinehall <david.weinehall@intel.com>
Acked-by: "Zou, Nanhai" <nanhai.zou@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
David Weinehall
2015-05-20 17:00:13 +03:00
committed by Daniel Vetter
parent 4373f0f24e
commit b1b38278e1
4 changed files with 26 additions and 4 deletions
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include/uapi/drm/i915_drm.h
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@@ -1106,6 +1106,7 @@ struct drm_i915_gem_context_param {
__u32 size;
__u64 param;
#define I915_CONTEXT_PARAM_BAN_PERIOD 0x1
#define I915_CONTEXT_PARAM_NO_ZEROMAP 0x2
__u64 value;
};