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authorMichael S. Tsirkin <mst@redhat.com>2017-06-23 22:25:03 +0300
committerMichael S. Tsirkin <mst@redhat.com>2017-08-08 00:31:09 +0300
commite2a7f28693aea7e194ec1435697ec4feb24f8a6f (patch)
treeb8bc5f69eacde2ddfeb8554ef7ab8f4e731bc6b0
parenta41c78c135eb1850826e96b2154690323ff66719 (diff)
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cpu: add APIs to allocate/free CPU environment
These will be implemented and then used by follow-up patches. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-rw-r--r--include/qom/cpu.h31
-rw-r--r--qom/cpu.c34
2 files changed, 65 insertions, 0 deletions
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 25eefea..e9d30c5 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -162,6 +162,10 @@ typedef struct CPUClass {
void (*dump_statistics)(CPUState *cpu, FILE *f,
fprintf_function cpu_fprintf, int flags);
int64_t (*get_arch_id)(CPUState *cpu);
+ void * (*alloc_env)(CPUState *cpu);
+ void (*get_env)(CPUState *cpu, void *env);
+ void (*set_env)(CPUState *cpu, void *env);
+ void (*free_env)(CPUState *cpu, void *env);
bool (*get_paging_enabled)(const CPUState *cpu);
void (*get_memory_mapping)(CPUState *cpu, MemoryMappingList *list,
Error **errp);
@@ -440,6 +444,33 @@ extern bool mttcg_enabled;
#define qemu_tcg_mttcg_enabled() (mttcg_enabled)
/**
+ * cpu_alloc_env: allocate CPU environment structure
+ * @cpu: allocate environment structure for this CPU
+ */
+void *cpu_alloc_env(CPUState *cpu);
+
+/**
+ * cpu_get_env: retrieve CPU environment structure
+ * @cpu: CPU to use
+ * @env: environment structure to use
+ */
+void cpu_get_env(CPUState *cpu, void *env);
+
+/**
+ * cpu_set_env: switch to given CPU environment
+ * @cpu: CPU to use
+ * @env: environment structure to use
+ */
+void cpu_set_env(CPUState *cpu, void *env);
+
+/**
+ * cpu_free_env: free CPU environment structure
+ * @cpu: free environment structure for this CPU
+ * @env: structure to free
+ */
+void cpu_free_env(CPUState *cpu, void *env);
+
+/**
* cpu_paging_enabled:
* @cpu: The CPU whose state is to be inspected.
*
diff --git a/qom/cpu.c b/qom/cpu.c
index 4f38db0..9201fd9 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -89,6 +89,40 @@ out:
return cpu;
}
+void *cpu_alloc_env(CPUState *cpu)
+{
+ CPUClass *cc = CPU_GET_CLASS(cpu);
+
+ return cc->alloc_env ? cc->alloc_env(cpu) : NULL;
+}
+
+void cpu_get_env(CPUState *cpu, void *env)
+{
+ CPUClass *cc = CPU_GET_CLASS(cpu);
+
+ if (cc->get_env) {
+ cc->get_env(cpu, env);
+ }
+}
+
+void cpu_set_env(CPUState *cpu, void *env)
+{
+ CPUClass *cc = CPU_GET_CLASS(cpu);
+
+ if (cc->set_env) {
+ cc->set_env(cpu, env);
+ }
+}
+
+void cpu_free_env(CPUState *cpu, void *env)
+{
+ CPUClass *cc = CPU_GET_CLASS(cpu);
+
+ if (cc->free_env) {
+ cc->free_env(cpu, env);
+ }
+}
+
bool cpu_paging_enabled(const CPUState *cpu)
{
CPUClass *cc = CPU_GET_CLASS(cpu);