[Qemu-devel] [PATCH] provide cpu_index to env mapping

[Glauber Costa <glommer@redhat.com>]

There are some people interested in, given a cpu number,
pick its CPUState. KVM is an example, although not yet in tree.
This patch provides a way of doing that.

Signed-off-by: Glauber Costa <glommer@redhat.com>
---
 cpu-all.h |    1 +
 exec.c    |   13 +++++++++++++
 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/cpu-all.h b/cpu-all.h
index dc9b034..8990be3 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -741,6 +741,7 @@ int page_check_range(target_ulong start, target_ulong len, int flags);
 
 void cpu_exec_init_all(unsigned long tb_size);
 CPUState *cpu_copy(CPUState *env);
+CPUState *qemu_get_cpu(int cpu);
 
 void cpu_dump_state(CPUState *env, FILE *f,
                     int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
diff --git a/exec.c b/exec.c
index 52f4e89..6c26cb6 100644
--- a/exec.c
+++ b/exec.c
@@ -541,6 +541,19 @@ static int cpu_common_load(QEMUFile *f, void *opaque, int version_id)
 }
 #endif
 
+CPUState *qemu_get_cpu(int cpu)
+{
+    CPUState *env = first_cpu;
+
+    while (env) {
+        if (env->cpu_index == cpu)
+            break;
+        env = env->next_cpu;
+    }
+
+    return env;
+}
+
 void cpu_exec_init(CPUState *env)
 {
     CPUState **penv;
-- 
1.5.6.6