[PULL,15/61] target/riscv: Support virtual time context synchronization

Commit Message

Alistair Francis Jan. 21, 2022, 5:57 a.m. UTC

From: Yifei Jiang <[e-mail]>

Add virtual time context description to vmstate_kvmtimer. After cpu being
loaded, virtual time context is updated to KVM.

Signed-off-by: Yifei Jiang <[e-mail]>
Signed-off-by: Mingwang Li <[e-mail]>
Reviewed-by: Anup Patel <[e-mail]>
Reviewed-by: Alistair Francis <[e-mail]>
Message-id: [e-mail]
Signed-off-by: Alistair Francis <[e-mail]>
---
 target/riscv/machine.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

Patch

diff --git a/target/riscv/machine.c b/target/riscv/machine.c
index 13b9ab375b..098670e680 100644
--- a/target/riscv/machine.c
+++ b/target/riscv/machine.c
@@ -185,6 +185,35 @@  static const VMStateDescription vmstate_rv128 = {
     }
 };
 
+static bool kvmtimer_needed(void *opaque)
+{
+    return kvm_enabled();
+}
+
+static int cpu_post_load(void *opaque, int version_id)
+{
+    RISCVCPU *cpu = opaque;
+    CPURISCVState *env = &cpu->env;
+
+    env->kvm_timer_dirty = true;
+    return 0;
+}
+
+static const VMStateDescription vmstate_kvmtimer = {
+    .name = "cpu/kvmtimer",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = kvmtimer_needed,
+    .post_load = cpu_post_load,
+    .fields = (VMStateField[]) {
+        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()
+    }
+};
+
 const VMStateDescription vmstate_riscv_cpu = {
     .name = "cpu",
     .version_id = 3,
@@ -240,6 +269,7 @@  const VMStateDescription vmstate_riscv_cpu = {
         &vmstate_vector,
         &vmstate_pointermasking,
         &vmstate_rv128,
+        &vmstate_kvmtimer,
         NULL
     }
 };