[RFC PATCH 04/12] arm/sdei: add system reset callback

[Heyi Guo <guoheyi@huawei.com>]

For this is a logical device which is not attached to system bus, we
cannot use DeviceClass->reset interface directly. Instead we register
our own reset callback to reset SDEI services when system resets.

Signed-off-by: Heyi Guo <guoheyi@huawei.com>
Signed-off-by: Jingyi Wang <wangjingyi11@huawei.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Dave Martin <Dave.Martin@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: James Morse <james.morse@arm.com>
---
 target/arm/sdei.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/target/arm/sdei.c b/target/arm/sdei.c
index b40fa36..f9a1208 100644
--- a/target/arm/sdei.c
+++ b/target/arm/sdei.c
@@ -1083,6 +1083,26 @@ static void qemu_sde_init(QemuSDEState *s)
     qemu_private_sde_init(s);
 }
 
+static void qemu_sde_reset(void *opaque)
+{
+    int64_t         ret;
+    CPUState        *cs;
+    QemuSDEState    *s = opaque;
+
+    CPU_FOREACH(cs) {
+        QemuSDECpu *sde_cpu = get_sde_cpu(s, cs);
+        sdei_private_reset_common(s, cs, true);
+        sde_cpu->masked = true;
+        sde_cpu->critical_running_event = SDEI_INVALID_EVENT_ID;
+        sde_cpu->normal_running_event = SDEI_INVALID_EVENT_ID;
+    }
+
+    ret = sdei_shared_reset_common(s, first_cpu, true);
+    if (ret) {
+        error_report("SDEI system reset failed: 0x%lx", ret);
+    }
+}
+
 static int qemu_sdei_pre_save(void *opaque)
 {
     QemuSDEState *s = opaque;
@@ -1235,6 +1255,7 @@ static void sdei_initfn(Object *obj)
     sde_state = s;
 
     qemu_sde_init(s);
+    qemu_register_reset(qemu_sde_reset, s);
 }
 
 static void qemu_sde_class_init(ObjectClass *klass, void *data)
-- 
1.8.3.1