1. 27 Jan, 2020 1 commit
    • Raghu Krishnamurthy's avatar
      T589: Fix insufficient ordering guarantees in bakery lock · c0018913
      Raghu Krishnamurthy authored
      
      
      bakery_lock_get() uses DMB LD after lock acquisition and
      bakery_lock_release() uses DMB ST before releasing the lock. This is
      insufficient in both cases. With just DMB LD, stores in the critical
      section can be reordered before the DMB LD which could mean writes in
      the critical section completing before the lock has been acquired
      successfully. Similarly, with just DMB ST, a load in the critical section
      could be reordered after the the DMB ST. DMB is the least expensive
      barrier that can provide the required ordering.
      Signed-off-by: default avatarRaghu Krishnamurthy <raghu.ncstate@icloud.com>
      Change-Id: Ieb74cbf5b76b09e1789331b71f37f7c660221b0e
      c0018913
  2. 24 Jan, 2020 30 commits
  3. 23 Jan, 2020 9 commits