accel/tcg: Restrict TCGCPUOps::cpu_exec_interrupt() to sysemu

All targets call TCGCPUOps::cpu_exec_interrupt() from sysemu code.
Move its declaration to restrict it to system emulation.
Extend the code guarded.
Restrict the static inlined need_replay_interrupt() method to
avoid a "defined but not used" warning.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210911165434.531552-24-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

accel/tcg/cpu-exec.c

@@ -685,6 +685,7 @@ static inline bool cpu_handle_exception(CPUState *cpu, int *ret)
     return false;
 }
 
+#ifndef CONFIG_USER_ONLY
 /*
  * CPU_INTERRUPT_POLL is a virtual event which gets converted into a
  * "real" interrupt event later. It does not need to be recorded for
@@ -698,12 +699,11 @@ static inline bool need_replay_interrupt(int interrupt_request)
     return true;
 #endif
 }
+#endif /* !CONFIG_USER_ONLY */
 
 static inline bool cpu_handle_interrupt(CPUState *cpu,
                                         TranslationBlock **last_tb)
 {
-    CPUClass *cc = CPU_GET_CLASS(cpu);
-
     /* Clear the interrupt flag now since we're processing
      * cpu->interrupt_request and cpu->exit_request.
      * Ensure zeroing happens before reading cpu->exit_request or
@@ -725,6 +725,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu,
             qemu_mutex_unlock_iothread();
             return true;
         }
+#if !defined(CONFIG_USER_ONLY)
         if (replay_mode == REPLAY_MODE_PLAY && !replay_has_interrupt()) {
             /* Do nothing */
         } else if (interrupt_request & CPU_INTERRUPT_HALT) {
@@ -753,12 +754,14 @@ static inline bool cpu_handle_interrupt(CPUState *cpu,
             qemu_mutex_unlock_iothread();
             return true;
         }
-#endif
+#endif /* !TARGET_I386 */
         /* The target hook has 3 exit conditions:
            False when the interrupt isn't processed,
            True when it is, and we should restart on a new TB,
            and via longjmp via cpu_loop_exit.  */
         else {
+            CPUClass *cc = CPU_GET_CLASS(cpu);
+
             if (cc->tcg_ops->cpu_exec_interrupt &&
                 cc->tcg_ops->cpu_exec_interrupt(cpu, interrupt_request)) {
                 if (need_replay_interrupt(interrupt_request)) {
@@ -777,6 +780,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu,
              * reload the 'interrupt_request' value */
             interrupt_request = cpu->interrupt_request;
         }
+#endif /* !CONFIG_USER_ONLY */
         if (interrupt_request & CPU_INTERRUPT_EXITTB) {
             cpu->interrupt_request &= ~CPU_INTERRUPT_EXITTB;
             /* ensure that no TB jump will be modified as

include/hw/core/tcg-cpu-ops.h

@@ -35,8 +35,6 @@ struct TCGCPUOps {
     void (*cpu_exec_enter)(CPUState *cpu);
     /** @cpu_exec_exit: Callback for cpu_exec cleanup */
     void (*cpu_exec_exit)(CPUState *cpu);
-    /** @cpu_exec_interrupt: Callback for processing interrupts in cpu_exec */
-    bool (*cpu_exec_interrupt)(CPUState *cpu, int interrupt_request);
     /**
      * @tlb_fill: Handle a softmmu tlb miss or user-only address fault
      *
@@ -68,6 +66,8 @@ struct TCGCPUOps {
     void (*do_interrupt)(CPUState *cpu);
 #endif /* !CONFIG_USER_ONLY || !TARGET_I386 */
 #ifdef CONFIG_SOFTMMU
+    /** @cpu_exec_interrupt: Callback for processing interrupts in cpu_exec */
+    bool (*cpu_exec_interrupt)(CPUState *cpu, int interrupt_request);
     /**
      * @do_transaction_failed: Callback for handling failed memory transactions
      * (ie bus faults or external aborts; not MMU faults)