1. 14 Sep, 2013 23 commits
  2. 07 Sep, 2013 15 commits
  3. 29 Aug, 2013 2 commits
    • Greg Kroah-Hartman's avatar
      Linux 3.4.60 · f571d16d
      Greg Kroah-Hartman authored
      f571d16d
    • David Vrabel's avatar
      x86/xen: do not identity map UNUSABLE regions in the machine E820 · fc431b04
      David Vrabel authored
      commit 3bc38cbc
      
       upstream.
      
      If there are UNUSABLE regions in the machine memory map, dom0 will
      attempt to map them 1:1 which is not permitted by Xen and the kernel
      will crash.
      
      There isn't anything interesting in the UNUSABLE region that the dom0
      kernel needs access to so we can avoid making the 1:1 mapping and
      treat it as RAM.
      
      We only do this for dom0, as that is where tboot case shows up.
      A PV domU could have an UNUSABLE region in its pseudo-physical map
      and would need to be handled in another patch.
      
      This fixes a boot failure on hosts with tboot.
      
      tboot marks a region in the e820 map as unusable and the dom0 kernel
      would attempt to map this region and Xen does not permit unusable
      regions to be mapped by guests.
      
        (XEN)  0000000000000000 - 0000000000060000 (usable)
        (XEN)  0000000000060000 - 0000000000068000 (reserved)
        (XEN)  0000000000068000 - 000000000009e000 (usable)
        (XEN)  0000000000100000 - 0000000000800000 (usable)
        (XEN)  0000000000800000 - 0000000000972000 (unusable)
      
      tboot marked this region as unusable.
      
        (XEN)  0000000000972000 - 00000000cf200000 (usable)
        (XEN)  00000000cf200000 - 00000000cf38f000 (reserved)
        (XEN)  00000000cf38f000 - 00000000cf3ce000 (ACPI data)
        (XEN)  00000000cf3ce000 - 00000000d0000000 (reserved)
        (XEN)  00000000e0000000 - 00000000f0000000 (reserved)
        (XEN)  00000000fe000000 - 0000000100000000 (reserved)
        (XEN)  0000000100000000 - 0000000630000000 (usable)
      Signed-off-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
      [v1: Altered the patch and description with domU's with UNUSABLE regions]
      Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      fc431b04