From 8f5e2b306b4e26db0ec65e0a27b232b179c9122b Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 2 Sep 2019 05:02:43 +0100 Subject: [PATCH] drm/i915: Restrict the aliasing-ppgtt to the size of the ggtt The aliasing-ppgtt is not allowed to be smaller than the ggtt, nor should we advertise it as being any bigger, or else we may get sued for false advertisement. Testcase: igt/gem_exec_big Fixes: 0b718ba1e884 ("drm/i915/gtt: Downgrade Cherryview back to aliasing-ppgtt") Signed-off-by: Chris Wilson Cc: Matthew Auld Reviewed-by: Matthew Auld Link: https://patchwork.freedesktop.org/patch/msgid/20190902040303.14195-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_gem_gtt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index ee51fd1a6207..906dc6fff383 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -2597,6 +2597,8 @@ static int init_aliasing_ppgtt(struct i915_ggtt *ggtt) GEM_BUG_ON(ggtt->vm.vma_ops.unbind_vma != ggtt_unbind_vma); ggtt->vm.vma_ops.unbind_vma = aliasing_gtt_unbind_vma; + ppgtt->vm.total = ggtt->vm.total; + return 0; err_ppgtt: