• Linus Torvalds's avatar
    Merge tag 'stable/for-linus-3.7-rc0-tag' of... · ccff9b1d
    Linus Torvalds authored
    Merge tag 'stable/for-linus-3.7-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
    
    Pull Xen fixes from Konrad Rzeszutek Wilk:
     "This has four bug-fixes and one tiny feature that I forgot to put
      initially in my tree due to oversight.
    
      The feature is for kdump kernels to speed up the /proc/vmcore reading.
      There is a ram_is_pfn helper function that the different platforms can
      register for.  We are now doing that.
    
      The bug-fixes cover some embarrassing struct pv_cpu_ops variables
      being set to NULL on Xen (but not baremetal).  We had a similar issue
      in the past with {write|read}_msr_safe and this fills the three
      missing ones.  The other bug-fix is to make the console output (hvc)
      be capable of dealing with misbehaving backends and not fall flat on
      its face.  Lastly, a quirk for older XenBus implementations that came
      with an ancient v3.4 hypervisor (so RHEL5 based) - reading of certain
      non-existent attributes just hangs the guest during bootup - so we
      take precaution of not doing that on such older installations.
    
      Feature:
       - Register a pfn_is_ram helper to speed up reading of /proc/vmcore.
      Bug-fixes:
       - Three pvops call for Xen were undefined causing BUG_ONs.
       - Add a quirk so that the shutdown watches (used by kdump) are not
         used with older Xen (3.4).
       - Fix ungraceful state transition for the HVC console."
    
    * tag 'stable/for-linus-3.7-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
      xen/pv-on-hvm kexec: add quirk for Xen 3.4 and shutdown watches.
      xen/bootup: allow {read|write}_cr8 pvops call.
      xen/bootup: allow read_tscp call for Xen PV guests.
      xen pv-on-hvm: add pfn_is_ram helper for kdump
      xen/hvc: handle backend CLOSED without CLOSING
    ccff9b1d
mmu.c 63.7 KB