[v3,05/13] accel/tcg: Restrict cpu_loop_exit_requested() to TCG

Commit Message

Philippe Mathieu-Daudé April 30, 2024, 12:27 p.m. UTC

Next commit will restrict IcountDecr to TCG, so the
inlined cpu_loop_exit_requested(), which is specific
to TCG, won't compile when TCG is disabled. Move it
to the new "exec/cpu-loop.h" header.

Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
Reviewed-by: Richard Henderson <[e-mail]>
Message-Id: <[e-mail]>
---
 include/exec/cpu-loop.h       | 35 +++++++++++++++++++++++++++++++++++
 include/exec/exec-all.h       | 17 -----------------
 accel/tcg/cpu-exec.c          |  1 +
 target/arm/tcg/helper-a64.c   |  1 +
 target/s390x/tcg/mem_helper.c |  1 +
 5 files changed, 38 insertions(+), 17 deletions(-)
 create mode 100644 include/exec/cpu-loop.h

Patch

diff --git a/include/exec/cpu-loop.h b/include/exec/cpu-loop.h
new file mode 100644
index 0000000000..36ce4064fd
--- /dev/null
+++ b/include/exec/cpu-loop.h
@@ -0,0 +1,35 @@ 
+/*
+ *  Translation CPU loop (target agnostic)
+ *
+ *  Copyright (c) 2003 Fabrice Bellard
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+#ifndef TRANSLATION_CPU_LOOP_H
+#define TRANSLATION_CPU_LOOP_H
+
+#ifndef CONFIG_TCG
+#error Can only include this header with TCG
+#endif
+
+#include "qemu/atomic.h"
+#include "hw/core/cpu.h"
+
+/**
+ * cpu_loop_exit_requested:
+ * @cpu: The CPU state to be tested
+ *
+ * Indicate if somebody asked for a return of the CPU to the main loop
+ * (e.g., via cpu_exit() or cpu_interrupt()).
+ *
+ * This is helpful for architectures that support interruptible
+ * instructions. After writing back all state to registers/memory, this
+ * call can be used to check if it makes sense to return to the main loop
+ * or to continue executing the interruptible instruction.
+ */
+static inline bool cpu_loop_exit_requested(CPUState *cpu)
+{
+    return (int32_t)qatomic_read(&cpu->neg.icount_decr.u32) < 0;
+}
+
+#endif
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 2cd7b8f61b..544e35dd24 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -29,23 +29,6 @@ 
 #include "exec/translation-block.h"
 #include "qemu/clang-tsa.h"
 
-/**
- * cpu_loop_exit_requested:
- * @cpu: The CPU state to be tested
- *
- * Indicate if somebody asked for a return of the CPU to the main loop
- * (e.g., via cpu_exit() or cpu_interrupt()).
- *
- * This is helpful for architectures that support interruptible
- * instructions. After writing back all state to registers/memory, this
- * call can be used to check if it makes sense to return to the main loop
- * or to continue executing the interruptible instruction.
- */
-static inline bool cpu_loop_exit_requested(CPUState *cpu)
-{
-    return (int32_t)qatomic_read(&cpu->neg.icount_decr.u32) < 0;
-}
-
 #if !defined(CONFIG_USER_ONLY) && defined(CONFIG_TCG)
 /* cputlb.c */
 /**
diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index 9af66bc191..eedba056ba 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -32,6 +32,7 @@ 
 #include "qemu/main-loop.h"
 #include "sysemu/cpus.h"
 #include "exec/cpu-all.h"
+#include "exec/cpu-loop.h"
 #include "sysemu/cpu-timers.h"
 #include "exec/replay-core.h"
 #include "sysemu/tcg.h"
diff --git a/target/arm/tcg/helper-a64.c b/target/arm/tcg/helper-a64.c
index 0ea8668ab4..b294f6bfd0 100644
--- a/target/arm/tcg/helper-a64.c
+++ b/target/arm/tcg/helper-a64.c
@@ -29,6 +29,7 @@ 
 #include "internals.h"
 #include "qemu/crc32c.h"
 #include "exec/exec-all.h"
+#include "exec/cpu-loop.h"
 #include "exec/cpu_ldst.h"
 #include "qemu/int128.h"
 #include "qemu/atomic128.h"
diff --git a/target/s390x/tcg/mem_helper.c b/target/s390x/tcg/mem_helper.c
index 6a308c5553..8435825fa5 100644
--- a/target/s390x/tcg/mem_helper.c
+++ b/target/s390x/tcg/mem_helper.c
@@ -26,6 +26,7 @@ 
 #include "exec/helper-proto.h"
 #include "exec/exec-all.h"
 #include "exec/page-protection.h"
+#include "exec/cpu-loop.h"
 #include "exec/cpu_ldst.h"
 #include "hw/core/tcg-cpu-ops.h"
 #include "qemu/int128.h"