> -----Original Message----- > From: Nguyen, Michael H > Sent: Thursday, December 11, 2014 8:13 PM > To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx > Cc: Bloomfield, Jon; Brad Volkin > Subject: [PATCH v7 3/5] drm/i915: Use batch length instead of object size in > command parser > > From: Brad Volkin <bradley.d.volkin@xxxxxxxxx> > > Previously we couldn't trust the user-supplied batch length because it came > directly from userspace (i.e. untrusted code). It would have affected what > commands software parsed without regard to what hardware would actually > execute, leaving a potential hole. > > With the parser now copying the user supplied batch buffer and writing > MI_NOP commands to any space after the copied region, we can safely use > the batch length input. This should be a performance win as the actual batch > length is frequently much smaller than the allocated object size. > > v2: Fix handling of non-zero batch_start_offset > > Issue: VIZ-4719 > Signed-off-by: Brad Volkin <bradley.d.volkin@xxxxxxxxx> Reviewed-by: Jon Bloomfield <jon.bloomfield@xxxxxxxxx> _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
