1. 02 Dec, 2016 1 commit
    • David Woodhouse's avatar
      iommu/vt-d: Fix PASID table allocation · d88a1bd0
      David Woodhouse authored
      commit 91017044 upstream.
      
      Somehow I ended up with an off-by-three error in calculating the size of
      the PASID and PASID State tables, which triggers allocations failures as
      those tables unfortunately have to be physically contiguous.
      
      In fact, even the *correct* maximum size of 8MiB is problematic and is
      wont to lead to allocation failures. Since I have extracted a promise
      that this *will* be fixed in hardware, I'm happy to limit it on the
      current hardware to a maximum of 0x20000 PASIDs, which gives us 1MiB
      tables — still not ideal, but better than before.
      
      Reported by Mika Kuoppala <mika.kuoppala@linux.intel.com> and also by
      Xunlei Pang <xlpang@redhat.com> who submitted a simpler patch to fix
      only the allocation (and not the free) to the "correct" limit... which
      was still problematic.
      Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      d88a1bd0
  2. 26 Nov, 2016 32 commits
  3. 21 Nov, 2016 7 commits