> -----Original Message----- > From: Nguyen, Michael H > Sent: Thursday, December 11, 2014 8:13 PM > To: [email protected] > 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 <[email protected]> > > 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 <[email protected]>
Reviewed-by: Jon Bloomfield <[email protected]> _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
