commit 9dfeca7c6b1d3a8f36531bbbac0322a9907bcd86
author Bharata B Rao <bharata@linux.vnet.ibm.com> Thu May 12 09:18:12 2016 +0530
committer David Gibson <david@gibson.dropbear.id.au> Mon May 30 14:03:29 2016 +1000
tree 0bfac7dc935693d7a68537c4fd55ba4e34ea9126
parent 1c59eb39cf75e660b1ac4ea95ef789c84021a1c4

exec: Do vmstate unregistration from cpu_exec_exit()

cpu_exec_init() does vmstate_register for the CPU device. This needs to be
undone from cpu_exec_exit(). This change is needed to support CPU hot
removal.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
[dwg: added missing include to fix compile on some archs]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

exec.c

diff --git a/exec.c b/exec.c
index a1dfc01..7261172 100644
--- a/exec.c
+++ b/exec.c
@@ -57,6 +57,8 @@
 #include "exec/ram_addr.h"
 #include "exec/log.h"
 
+#include "migration/vmstate.h"
+
 #include "qemu/range.h"
 #ifndef _WIN32
 #include "qemu/mmap-alloc.h"
@@ -637,6 +639,8 @@
 
 void cpu_exec_exit(CPUState *cpu)
 {
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+
 #if defined(CONFIG_USER_ONLY)
     cpu_list_lock();
 #endif
@@ -654,6 +658,13 @@
 #if defined(CONFIG_USER_ONLY)
     cpu_list_unlock();
 #endif
+
+    if (cc->vmsd != NULL) {
+        vmstate_unregister(NULL, cc->vmsd, cpu);
+    }
+    if (qdev_get_vmsd(DEVICE(cpu)) == NULL) {
+        vmstate_unregister(NULL, &vmstate_cpu_common, cpu);
+    }
 }
 
 void cpu_exec_init(CPUState *cpu, Error **errp)