Merge remote-tracking branch 'remotes/borntraeger/tags/kvm-s390-20140227' into staging

Several features, fixes and cleanups for kvm/s390:

- sclp event facility: cleanup structure. This allows to use
  realize/unrealize   as well as migration support via vmsd
- reboot: Two fixes that make reboot much more reliable
- ipl: make elf loading more robust
- flic interrupt controller: This allows to migrate floating
  interrupts, as well as clear them on reset etc.
- enable async_pf feature of KVM on s390
- several sclp fixes and cleanups
- several sigp fixes and cleanups

* remotes/borntraeger/tags/kvm-s390-20140227: (22 commits)
  s390x/ipl: Fix crash of ELF images with arbitrary entry points
  s390x/kvm: Rework priv instruction handlers
  s390x/kvm: Add missing SIGP CPU RESET order
  s390x/kvm: Rework SIGP INITIAL CPU RESET handler
  s390x/cpu: Use ioctl to reset state in the kernel
  s390-ccw.img: new binary rom to match latest fixes
  s390-ccw.img: Fix sporadic errors with ccw boot image - initialize css
  s390-ccw.img: Fix sporadic reboot hangs: Initialize next_idx
  s390x/event-facility: exploit realize/unrealize
  s390x/event-facility: add support for live migration
  s390x/event-facility: code restructure
  s390x/event-facility: some renaming
  s390x/sclp: Fixed setting of condition code register
  s390x/sclp: Add missing checks to SCLP handler
  s390x/sclp: Fixed the size of sccb and code parameter
  s390x/eventfacility: mask out commands
  s390x/virtio-hcall: Specification exception for illegal subcodes
  s390x/virtio-hcall: Add range check for hypervisor call
  s390x/kvm: Fixed bad SIGP SET-ARCHITECTURE handler
  s390x/async_pf: Check for apf extension and enable pfault
  ...

Conflicts:
	linux-headers/linux/kvm.h

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c
index ff57b806e4..1a8c1cc39f 100644
--- a/target-s390x/cpu.c
+++ b/target-s390x/cpu.c
@@ -83,6 +83,7 @@ static void s390_cpu_reset(CPUState *s)
     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
     CPUS390XState *env = &cpu->env;
 
+    env->pfault_token = -1UL;
     s390_del_running_cpu(cpu);
     scc->parent_reset(s);
 #if !defined(CONFIG_USER_ONLY)
@@ -105,6 +106,17 @@ static void s390_cpu_initial_reset(CPUState *s)
     /* architectured initial values for CR 0 and 14 */
     env->cregs[0] = CR0_RESET;
     env->cregs[14] = CR14_RESET;
+
+    env->pfault_token = -1UL;
+
+#if defined(CONFIG_KVM)
+    /* Reset state inside the kernel that we cannot access yet from QEMU. */
+    if (kvm_enabled()) {
+        if (kvm_vcpu_ioctl(s, KVM_S390_INITIAL_RESET, NULL)) {
+            perror("Initial CPU reset failed");
+        }
+    }
+#endif
 }
 
 /* CPUClass:reset() */
@@ -123,6 +135,9 @@ static void s390_cpu_full_reset(CPUState *s)
     /* architectured initial values for CR 0 and 14 */
     env->cregs[0] = CR0_RESET;
     env->cregs[14] = CR14_RESET;
+
+    env->pfault_token = -1UL;
+
     /* set halted to 1 to make sure we can add the cpu in
      * s390_ipl_cpu code, where CPUState::halted is set back to 0
      * after incrementing the cpu counter */