From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Fri, 5 Sep 2014 10:52:46 -0300
Subject: [PATCH] Introduce cpu_clean_all_dirty

Introduce cpu_clean_all_dirty, to force subsequent cpu_synchronize_all_states
to read in-kernel register state.

Cc: qemu-stable@nongnu.org
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit de9d61e83d43be9069e6646fa9d57a3f47779d28)

Conflicts:
	cpus.c
---
 cpus.c                | 9 +++++++++
 include/sysemu/cpus.h | 1 +
 include/sysemu/kvm.h  | 8 ++++++++
 kvm-all.c             | 5 +++++
 4 files changed, 23 insertions(+)

diff --git a/cpus.c b/cpus.c
index 0f65e76..ab0de51 100644
--- a/cpus.c
+++ b/cpus.c
@@ -434,6 +434,15 @@ bool cpu_is_stopped(CPUState *cpu)
     return !runstate_is_running() || cpu->stopped;
 }
 
+void cpu_clean_all_dirty(void)
+{
+    CPUState *cpu;
+
+    for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {
+        cpu_clean_state(cpu);
+    }
+}
+
 static int do_vm_stop(RunState state)
 {
     int ret = 0;
diff --git a/include/sysemu/cpus.h b/include/sysemu/cpus.h
index 6502488..4f8a3df 100644
--- a/include/sysemu/cpus.h
+++ b/include/sysemu/cpus.h
@@ -10,6 +10,7 @@ void cpu_stop_current(void);
 void cpu_synchronize_all_states(void);
 void cpu_synchronize_all_post_reset(void);
 void cpu_synchronize_all_post_init(void);
+void cpu_clean_all_dirty(void);
 
 void qtest_clock_warp(int64_t dest);
 
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index de74411..83a107a 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -290,6 +290,7 @@ int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
 
 void kvm_cpu_synchronize_post_reset(CPUState *cpu);
 void kvm_cpu_synchronize_post_init(CPUState *cpu);
+void kvm_cpu_clean_state(CPUState *cpu);
 
 static inline void cpu_synchronize_post_reset(CPUState *cpu)
 {
@@ -305,6 +306,13 @@ static inline void cpu_synchronize_post_init(CPUState *cpu)
     }
 }
 
+static inline void cpu_clean_state(CPUState *cpu)
+{
+    if (kvm_enabled()) {
+        kvm_cpu_clean_state(cpu);
+    }
+}
+
 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg);
 void kvm_irqchip_release_virq(KVMState *s, int virq);
diff --git a/kvm-all.c b/kvm-all.c
index 783b8ec..369c221 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1625,6 +1625,11 @@ void kvm_cpu_synchronize_post_init(CPUState *cpu)
     run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, cpu);
 }
 
+void kvm_cpu_clean_state(CPUState *cpu)
+{
+    cpu->kvm_vcpu_dirty = false;
+}
+
 int kvm_cpu_exec(CPUState *cpu)
 {
     struct kvm_run *run = cpu->kvm_run;