Subject: [PATCH 06/13] Introduce cpu_clean_all_dirty

From: Marcelo Tosatti <[email-masked]>
Date: Mon, 22 Sep 2014 17:05:25 +0200

Message-id: <[email-masked]>
Patchwork-id: 61363
O-Subject: [PATCH RHEV-7.1 qemu-kvm-rhev 1/3] Introduce cpu_clean_all_dirty
Bugzilla: 1143054
RH-Acked-by: Eduardo Habkost <[email-masked]>
RH-Acked-by: Radim Krcmar <[email-masked]>
RH-Acked-by: Paolo Bonzini <[email-masked]>

commit de9d61e83d43be9069e6646fa9d57a3f47779d28 upstream of qemu-kvm.git uq/master branch
Author: Marcelo Tosatti <[email-masked]>

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

Cc: [email-masked]
Signed-off-by: Marcelo Tosatti <[email-masked]>
Signed-off-by: Paolo Bonzini <[email-masked]>
Signed-off-by: Miroslav Rezanina <[email-masked]>
---
 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 5e7f2cf..492defe 100644
--- a/cpus.c
+++ b/cpus.c
@@ -523,6 +523,15 @@ void cpu_synchronize_all_post_init(void)
     }
 }
 
+void cpu_clean_all_dirty(void)
+{
+    CPUState *cpu;
+
+    CPU_FOREACH(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 4f79081..3f162a9 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 174ea36..777dc66 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -348,6 +348,7 @@ int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
 void kvm_cpu_synchronize_state(CPUState *cpu);
 void kvm_cpu_synchronize_post_reset(CPUState *cpu);
 void kvm_cpu_synchronize_post_init(CPUState *cpu);
+void kvm_cpu_clean_state(CPUState *cpu);
 
 /* generic hooks - to be moved/refactored once there are more users */
 
@@ -372,6 +373,13 @@ 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 5091031..062002c 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1684,6 +1684,11 @@ void kvm_cpu_synchronize_post_init(CPUState *cpu)
     cpu->kvm_vcpu_dirty = false;
 }
 
+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;
-- 
1.8.3.1