1. 06 Jul, 2016 2 commits
  2. 23 Oct, 2015 1 commit
  3. 08 Sep, 2015 1 commit
  4. 16 Mar, 2015 2 commits
    • David Vrabel's avatar
      xen/privcmd: improve performance of MMAPBATCH_V2 · 4e8c0c8c
      David Vrabel authored
      Make the IOCTL_PRIVCMD_MMAPBATCH_V2 (and older V1 version) map
      multiple frames at a time rather than one at a time, despite the pages
      being non-consecutive GFNs.
      
      xen_remap_foreign_mfn_array() is added which maps an array of GFNs
      (instead of a consecutive range of GFNs).
      
      Since per-frame errors are returned in an array, privcmd must set the
      MMAPBATCH_V1 error bits as part of the "report errors" phase, after
      all the frames are mapped.
      
      Migrate times are significantly improved (when using a PV toolstack
      domain).  For example, for an idle 12 GiB PV guest:
      
              Before     After
        real  0m38.179s  0m26.868s
        user  0m15.096s  0m13.652s
        sys   0m28.988s  0m18.732s
      Signed-off-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
      Reviewed-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
      4e8c0c8c
    • David Vrabel's avatar
      xen: unify foreign GFN map/unmap for auto-xlated physmap guests · 628c28ee
      David Vrabel authored
      Auto-translated physmap guests (arm, arm64 and x86 PVHVM/PVH) map and
      unmap foreign GFNs using the same method (updating the physmap).
      Unify the two arm and x86 implementations into one commont one.
      
      Note that on arm and arm64, the correct error code will be returned
      (instead of always -EFAULT) and map/unmap failure warnings are no
      longer printed.  These changes are required if the foreign domain is
      paging (-ENOENT failures are expected and must be propagated up to the
      caller).
      Signed-off-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
      Reviewed-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
      628c28ee