[PATCH v4 2/7] target/riscv: machine: Add debug state description

[Bin Meng <bmeng.cn@gmail.com>]

From: Bin Meng <bin.meng@windriver.com>

Add a subsection to machine.c to migrate debug CSR state.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---

(no changes since v2)

Changes in v2:
- new patch: add debug state description

 target/riscv/machine.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/target/riscv/machine.c b/target/riscv/machine.c
index 5178b3fec9..4921dad09d 100644
--- a/target/riscv/machine.c
+++ b/target/riscv/machine.c
@@ -216,7 +216,38 @@ static const VMStateDescription vmstate_kvmtimer = {
         VMSTATE_UINT64(env.kvm_timer_time, RISCVCPU),
         VMSTATE_UINT64(env.kvm_timer_compare, RISCVCPU),
         VMSTATE_UINT64(env.kvm_timer_state, RISCVCPU),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static bool debug_needed(void *opaque)
+{
+    RISCVCPU *cpu = opaque;
+    CPURISCVState *env = &cpu->env;
+
+    return riscv_feature(env, RISCV_FEATURE_DEBUG);
+}
 
+static const VMStateDescription vmstate_debug_type2 = {
+    .name = "cpu/debug/type2",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINTTL(mcontrol, type2_trigger_t),
+        VMSTATE_UINTTL(maddress, type2_trigger_t),
+        VMSTATE_END_OF_LIST()
+   }
+};
+
+static const VMStateDescription vmstate_debug = {
+    .name = "cpu/debug",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = debug_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINTTL(env.trigger_cur, RISCVCPU),
+        VMSTATE_STRUCT_ARRAY(env.type2_trig, RISCVCPU, TRIGGER_TYPE2_NUM,
+                             0, vmstate_debug_type2, type2_trigger_t),
         VMSTATE_END_OF_LIST()
     }
 };
@@ -292,6 +323,7 @@ const VMStateDescription vmstate_riscv_cpu = {
         &vmstate_pointermasking,
         &vmstate_rv128,
         &vmstate_kvmtimer,
+        &vmstate_debug,
         NULL
     }
 };
-- 
2.25.1