Merge remote-tracking branch 'borntraeger/tags/kdump' into staging

This is a set of patches dealing with kdump support for s390x/kvm.
kdump on s390x uses subcode 1 of diagnose 0x308 to put the hardware
in a defined state. This is different from a full reset, since it
does not touch all CPU registers.
These patches define the cpu resets, the subsystem reset a load
function and also wires up the "nmi" command to issue a RESTART
interrupt as defined in the z/Architecture principles of operation.

This allows recent guest kernels with properly setup userspace
to trigger kdump:
- via guest crash
- via nmi from the host

# gpg: Signature made Fri 30 Aug 2013 07:19:18 AM CDT using RSA key ID B5A61C7C
# gpg: Can't check signature: public key not found

# By Christian Borntraeger (5) and Eugene (jno) Dvurechenski (2)
# Via Christian Borntraeger
* borntraeger/tags/kdump:
  s390: wire up nmi command to raise a RESTART interrupt on S390
  s390: Implement load normal reset
  s390/cpu: split CPU reset into architectured functions
  s390: provide a cpu load normal function
  s390: provide I/O subsystem reset
  s390/kvm: basic implementation of diagnose 308 subcode 6
  s390x/kvm: Fix switch/case indentation for handle_diag

Message-id: 1377810649-47484-1-git-send-email-borntraeger@de.ibm.com

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