[PATCH 0/3] kvm-s390: revised version of kvm-s390 guest memory handling - rebased v2

[ehrhardt@linux.vnet.ibm.com]

From: Christian Ehrhardt <ehrhardt@de.ibm.com>

As requested this is a rebased patch on top of the already applied v3
of the patch series.

*updates to already applied version*
- remove dependency to KVM_REQ_MMU_RELOAD in generic code
- remove explicit barrier after test_and_clear_bit as it is implied
- ensure the wait_on_bit waiter is notified
- move the reset of requests to kvm_vcpu_release to drop them early
- ensure dropping all vcpu requests while freeing a vcpu
- ensure kick allocations (might_sleep) are out of atomic context
- update vcpu->cpu in kvm-s390 arch handler for load/put
- centralize consumption of vcpu->request bits
- updates on running vcpus can now be handled without need to rerun the vcpu
- kvm_arch_set_memory_region waits until the bit is consumed by the vcpu
- kickout only scheduled vcpus (wait might hang forever on non-scheduled vcpus)

Note: further unification of make_all_cpu_request and the kick mechanism is
planned, but it might be good to split it from this step towards commonality.

Patches included:
Subject: [PATCH 1/3] kvm-s390: infrastructure to kick vcpus out of guest state - rebased
Subject: [PATCH 2/3] kvm-s390: update vcpu->cpu - rebased
Subject: [PATCH 3/3] kvm-s390: streamline memslot handling - rebased v2

Overall-Diffstat:
 arch/s390/include/asm/kvm_host.h |    2 +-
 arch/s390/kvm/intercept.c        |   10 ++++++----
 arch/s390/kvm/kvm-s390.c         |   36 +++++++++++++++++++++++++-----------
 arch/s390/kvm/kvm-s390.h         |   22 +++++++++++++++++++++-
 arch/s390/kvm/sigp.c             |   31 +++++++++++++++++++++----------
 virt/kvm/kvm_main.c              |    6 ++++++
 6 files changed, 80 insertions(+), 27 deletions(-)