From: Ben Widawsky <[email protected]> Daniel requested in the bug that I use a 3GB fallback size. Since this is not in the spec as a valid size, I decided against it. We could potentially add a patch to bump it to 3GB on top of this one.
This probably should be CC: stable - but I'll let the powers that be decide that one. v2: Change ifdef to 32b, instead of ifndef update comment Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76619 Signed-off-by: Ben Widawsky <[email protected]> --- drivers/gpu/drm/i915/i915_gem_gtt.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 846b6ee..d03a540 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1759,6 +1759,14 @@ static inline unsigned int gen8_get_total_gtt_size(u16 bdw_gmch_ctl) bdw_gmch_ctl &= BDW_GMCH_GGMS_MASK; if (bdw_gmch_ctl) bdw_gmch_ctl = 1 << bdw_gmch_ctl; + +#ifdef CONFIG_32BIT + /* Limit 32B platforms to a 2GB GGTT + 4 << 20 / pte size * PAGE_SIZE */ + if (bdw_gmch_ctl > 4) + bdw_gmch_ctl = 4; +#endif + return bdw_gmch_ctl << 20; } -- 1.9.2 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
