(xen) stable/for-linus-3.7-rc0-tag for v3.7-rc0

Hey Linus,

Please git pull the following tag:

git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git stable/for-linus-3.7-rc0-tag

which 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.

That is it. Please pull!

 arch/x86/xen/enlighten.c           |   18 +++++++++++++++-
 arch/x86/xen/mmu.c                 |   41 ++++++++++++++++++++++++++++++++++++
 drivers/tty/hvc/hvc_xen.c          |    5 +++-
 drivers/xen/xenbus/xenbus_xs.c     |   21 ++++++++++++++++++
 include/xen/interface/hvm/hvm_op.h |   19 ++++++++++++++++
 5 files changed, 102 insertions(+), 2 deletions(-)

David Vrabel (1):
xen/hvc: handle backend CLOSED without CLOSING

Konrad Rzeszutek Wilk (3):
xen/bootup: allow read_tscp call for Xen PV guests. xen/bootup: allow {read|write}_cr8 pvops call. xen/pv-on-hvm kexec: add quirk for Xen 3.4 and shutdown watches.

Olaf Hering (1):
xen pv-on-hvm: add pfn_is_ram helper for kdump