[PATCH 00/18] [uq/master] MCE & IO exit fixes, prepare for VCPU loop reuse

[Jan Kiszka <jan.kiszka@web.de>]

This series has three major topics:
 - add required kernel reentry after IO exits
 - provide MCE forwarding under !CONFIG_IOTHREAD
 - prepare kvm_cpu_exec for qemu-kvm reuse

Along these lines, several cleanups and simplifcations are applied to
cpus.c and the KVM VCPU execution bits. The first patch should of course
be dropped if uq/master is applied without "kvm: Drop return value of
kvm_cpu_exec".

Note that I did not yet to test the MCE support. Is there an easy way to
trigger valid MCE events at kernel level? Or do I need to fake SIGBUS at
qemu level?

Jan Kiszka (18):
  Revert "kvm: Drop return value of kvm_cpu_exec"
  kvm: Drop redundant kvm_enabled from kvm_cpu_thread_fn
  kvm: Provide sigbus services arch-independently
  Refactor signal setup functions in cpus.c
  kvm: Set up signal mask also for !CONFIG_IOTHREAD
  kvm: Refactor qemu_kvm_eat_signals
  kvm: Add MCE signal support for !CONFIG_IOTHREAD
  kvm: Handle kvm_init_vcpu errors
  Refactor kvm&tcg function names in cpus.c
  Fix a few coding style violations in cpus.c
  Introduce VCPU self-signaling service
  kvm: Move irqchip event processing out of inner loop
  kvm: Unconditionally reenter kernel after IO exits
  kvm: Remove static return code of kvm_handle_io
  kvm: Leave kvm_cpu_exec directly after KVM_EXIT_SHUTDOWN
  kvm: Separate TCG from KVM cpu execution
  kvm: x86: Prepare VCPU loop for in-kernel irqchip
  kvm: Drop return values from kvm_arch_pre/post_run

 cpu-exec.c         |   19 +--
 cpus.c             |  521 +++++++++++++++++++++++++++++++---------------------
 kvm-all.c          |   76 +++++----
 kvm-stub.c         |    9 +-
 kvm.h              |   14 +-
 qemu-common.h      |    1 +
 target-i386/kvm.c  |   90 +++++-----
 target-ppc/kvm.c   |   16 ++-
 target-s390x/kvm.c |   16 ++-
 9 files changed, 444 insertions(+), 318 deletions(-)