[PATCH v10 1/3] drm/i915: Disconnect 32 and 48 bit ppGTT support

Zhenyu Wang
2017-08-14T07:41:38Z

From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

Configurations like virtualized environments may support only 48 bit
ppGTT without supporting 32 bit ppGTT. Support this by disconnecting
the relationship of the two feature bits.

Cc: Tina Zhang <tina.zhang@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 10aa7762d9a6..a5eada1b93c5 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -180,10 +180,15 @@ int intel_sanitize_enable_ppgtt(struct drm_i915_private *dev_priv,
return 0;
}

- if (INTEL_GEN(dev_priv) >= 8 && i915.enable_execlists && has_full_ppgtt)
- return has_full_48bit_ppgtt ? 3 : 2;
- else
- return has_aliasing_ppgtt ? 1 : 0;
+ if (INTEL_GEN(dev_priv) >= 8 && i915.enable_execlists) {
+ if (has_full_48bit_ppgtt)
+ return 3;
+
+ if (has_full_ppgtt)
+ return 2;
+ }
+
+ return has_aliasing_ppgtt ? 1 : 0;
}

static int ppgtt_bind_vma(struct i915_vma *vma,
--
2.14.0