3 files changed, 28 insertions, 0 deletions
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h
index 8501a33..bc05dce 100644
--- a/include/exec/cpu-all.h
+++ b/include/exec/cpu-all.h
@@ -311,6 +311,10 @@ CPUArchState *cpu_copy(CPUArchState *env);
 #define TLB_MMIO            (1 << (TARGET_PAGE_BITS_MIN - 2))
 #define TLB_WATCHPOINT      0
 
+static inline int cpu_mmu_index(CPUState *cs, bool ifetch)
+{
+    return MMU_USER_IDX;
+}
 #else
 
 /*
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index dcbd5f5..9ead1be 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -8,6 +8,7 @@
 #include "exec/hwaddr.h"
 #endif
 #include "hw/core/cpu.h"
+#include "tcg/debug-assert.h"
 
 #define EXCP_INTERRUPT  0x10000 /* async interruption */
 #define EXCP_HLT        0x10001 /* hlt instruction reached */
@@ -262,4 +263,24 @@ static inline CPUState *env_cpu(CPUArchState *env)
     return (void *)env - sizeof(CPUState);
 }
 
+#ifndef CONFIG_USER_ONLY
+/**
+ * cpu_mmu_index:
+ * @env: The cpu environment
+ * @ifetch: True for code access, false for data access.
+ *
+ * Return the core mmu index for the current translation regime.
+ * This function is used by generic TCG code paths.
+ *
+ * The user-only version of this function is inline in cpu-all.h,
+ * where it always returns MMU_USER_IDX.
+ */
+static inline int cpu_mmu_index(CPUState *cs, bool ifetch)
+{
+    int ret = cs->cc->mmu_index(cs, ifetch);
+    tcg_debug_assert(ret >= 0 && ret < NB_MMU_MODES);
+    return ret;
+}
+#endif /* !CONFIG_USER_ONLY */
+
 #endif /* CPU_COMMON_H */
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 2c284d6..4385ce5 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -103,6 +103,8 @@ struct SysemuCPUOps;
  * @parse_features: Callback to parse command line arguments.
  * @reset_dump_flags: #CPUDumpFlags to use for reset logging.
  * @has_work: Callback for checking if there is work to do.
+ * @mmu_index: Callback for choosing softmmu mmu index;
+ *       may be used internally by memory_rw_debug without TCG.
  * @memory_rw_debug: Callback for GDB memory access.
  * @dump_state: Callback for dumping state.
  * @query_cpu_fast:
@@ -150,6 +152,7 @@ struct CPUClass {
     void (*parse_features)(const char *typename, char *str, Error **errp);
 
     bool (*has_work)(CPUState *cpu);
+    int (*mmu_index)(CPUState *cpu, bool ifetch);
     int (*memory_rw_debug)(CPUState *cpu, vaddr addr,
                            uint8_t *buf, int len, bool is_write);
     void (*dump_state)(CPUState *cpu, FILE *, int flags);