[PATCH v3 37/39] accel: Declare AccelClass::[un]realize_cpu() handlers

[Richard Henderson <richard.henderson@linaro.org>]

From: Philippe Mathieu-Daudé <philmd@linaro.org>

Currently accel_cpu_realize() only performs target-specific
realization. Introduce the [un]realize_cpu fields in the
base AccelClass to be able to perform target-agnostic
[un]realization of vCPUs.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230915190009.68404-4-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/qemu/accel.h |  2 ++
 accel/accel-target.c | 21 +++++++++++++++++++--
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/include/qemu/accel.h b/include/qemu/accel.h
index 7b02cb40e5..0b6031bd82 100644
--- a/include/qemu/accel.h
+++ b/include/qemu/accel.h
@@ -43,6 +43,8 @@ typedef struct AccelClass {
     bool (*has_memory)(MachineState *ms, AddressSpace *as,
                        hwaddr start_addr, hwaddr size);
 #endif
+    bool (*realize_cpu)(CPUState *cpu, Error **errp);
+    void (*unrealize_cpu)(CPUState *cpu);
 
     /* gdbstub related hooks */
     int (*gdbstub_supported_sstep_flags)(void);
diff --git a/accel/accel-target.c b/accel/accel-target.c
index cc3a45e663..6d427f2b9d 100644
--- a/accel/accel-target.c
+++ b/accel/accel-target.c
@@ -122,15 +122,32 @@ void accel_cpu_instance_init(CPUState *cpu)
 bool accel_cpu_realize(CPUState *cpu, Error **errp)
 {
     CPUClass *cc = CPU_GET_CLASS(cpu);
+    AccelState *accel = current_accel();
+    AccelClass *acc = ACCEL_GET_CLASS(accel);
 
-    if (cc->accel_cpu && cc->accel_cpu->cpu_realizefn) {
-        return cc->accel_cpu->cpu_realizefn(cpu, errp);
+    /* target specific realization */
+    if (cc->accel_cpu && cc->accel_cpu->cpu_realizefn
+        && !cc->accel_cpu->cpu_realizefn(cpu, errp)) {
+        return false;
     }
+
+    /* generic realization */
+    if (acc->realize_cpu && !acc->realize_cpu(cpu, errp)) {
+        return false;
+    }
+
     return true;
 }
 
 void accel_cpu_unrealize(CPUState *cpu)
 {
+    AccelState *accel = current_accel();
+    AccelClass *acc = ACCEL_GET_CLASS(accel);
+
+    /* generic unrealization */
+    if (acc->unrealize_cpu) {
+        acc->unrealize_cpu(cpu);
+    }
 }
 
 int accel_supported_gdbstub_sstep_flags(void)
-- 
2.34.1