From 1b5120d74b1e19c12f8f476f8015a0ac87e11878 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@linaro.org>
Date: Fri, 15 Sep 2023 22:55:33 +0200
Subject: [PATCH] accel: Introduce cpu_exec_reset_hold()
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Introduce cpu_exec_reset_hold() which call an accelerator
specific AccelOpsClass::cpu_reset_hold() handler.

Define a stub on TCG user emulation, because CPU reset is
irrelevant there.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230918104153.24433-3-philmd@linaro.org>
---
 accel/tcg/user-exec-stub.c | 4 ++++
 hw/core/cpu-common.c       | 1 +
 include/hw/core/cpu.h      | 1 +
 include/sysemu/accel-ops.h | 1 +
 system/cpus.c              | 7 +++++++
 5 files changed, 14 insertions(+)

diff --git a/accel/tcg/user-exec-stub.c b/accel/tcg/user-exec-stub.c
index 2dc6fd9c4e..4fbe2dbdc8 100644
--- a/accel/tcg/user-exec-stub.c
+++ b/accel/tcg/user-exec-stub.c
@@ -14,6 +14,10 @@ void qemu_init_vcpu(CPUState *cpu)
 {
 }
 
+void cpu_exec_reset_hold(CPUState *cpu)
+{
+}
+
 /* User mode emulation does not support record/replay yet.  */
 
 bool replay_exception(void)
diff --git a/hw/core/cpu-common.c b/hw/core/cpu-common.c
index 29c917c5dc..7d266c36ac 100644
--- a/hw/core/cpu-common.c
+++ b/hw/core/cpu-common.c
@@ -137,6 +137,7 @@ static void cpu_common_reset_hold(Object *obj)
     cpu->crash_occurred = false;
     cpu->cflags_next_tb = -1;
 
+    cpu_exec_reset_hold(cpu);
     if (tcg_enabled()) {
         tcg_flush_jmp_cache(cpu);
         tcg_flush_softmmu_tlb(cpu);
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 18593db5b2..6373aa4501 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -1153,6 +1153,7 @@ void cpu_class_init_props(DeviceClass *dc);
 void cpu_exec_initfn(CPUState *cpu);
 void cpu_exec_realizefn(CPUState *cpu, Error **errp);
 void cpu_exec_unrealizefn(CPUState *cpu);
+void cpu_exec_reset_hold(CPUState *cpu);
 
 /**
  * target_words_bigendian:
diff --git a/include/sysemu/accel-ops.h b/include/sysemu/accel-ops.h
index 3c1fab4b1e..ef91fc28bb 100644
--- a/include/sysemu/accel-ops.h
+++ b/include/sysemu/accel-ops.h
@@ -30,6 +30,7 @@ struct AccelOpsClass {
     void (*ops_init)(AccelOpsClass *ops);
 
     bool (*cpus_are_resettable)(void);
+    void (*cpu_reset_hold)(CPUState *cpu);
 
     void (*create_vcpu_thread)(CPUState *cpu); /* MANDATORY NON-NULL */
     void (*kick_vcpu_thread)(CPUState *cpu);
diff --git a/system/cpus.c b/system/cpus.c
index 0848e0dbdb..952f15868c 100644
--- a/system/cpus.c
+++ b/system/cpus.c
@@ -201,6 +201,13 @@ bool cpus_are_resettable(void)
     return true;
 }
 
+void cpu_exec_reset_hold(CPUState *cpu)
+{
+    if (cpus_accel->cpu_reset_hold) {
+        cpus_accel->cpu_reset_hold(cpu);
+    }
+}
+
 int64_t cpus_get_virtual_clock(void)
 {
     /*