[patch uq/master 1/9] kvm: set cpu_single_env around KVM_RUN ioctl

[Marcelo Tosatti <mtosatti@xxxxxxxxxx>]

Zero cpu_single_env before leaving global lock protection, and
restore on return.

Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>

Index: qemu/kvm-all.c
===================================================================
--- qemu.orig/kvm-all.c
+++ qemu/kvm-all.c
@@ -846,9 +846,11 @@ int kvm_cpu_exec(CPUState *env)
         }
 
         kvm_arch_pre_run(env, run);
+        cpu_single_env = NULL;
         qemu_mutex_unlock_iothread();
         ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
         qemu_mutex_lock_iothread();
+        cpu_single_env = env;
         kvm_arch_post_run(env, run);
 
         if (ret == -EINTR || ret == -EAGAIN) {


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