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>

1 files changed, 31 insertions, 0 deletions

diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 25eefea7ab..e9d30c52b4 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.
  *