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

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Submitter Marcelo Tosatti
Date May 4, 2010, 12:45 p.m.
Message ID <20100504124634.157938055@redhat.com>
Download mbox | patch
Permalink /patch/51608/
State New
Headers show

Comments

Marcelo Tosatti - May 4, 2010, 12:45 p.m.
Zero cpu_single_env before leaving global lock protection, and
restore on return.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Patch

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) {