[PATCH 1/3] target-i386: add a subsection of vcpu's TSC rate in vmstate_x86_cpu

[Haozhong Zhang <haozhong.zhang@xxxxxxxxx>]

The newly added subsection 'vmstate_tsc_khz' in this patch results in
vcpu's TSC rate being saved on the source machine and loaded on the
target machine during the migration.

Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
---
 target-i386/machine.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/target-i386/machine.c b/target-i386/machine.c
index 9fa0563..80108a3 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -752,6 +752,25 @@ static const VMStateDescription vmstate_xss = {
     }
 };
 
+static bool tsc_khz_needed(void *opaque)
+{
+    X86CPU *cpu = opaque;
+    CPUX86State *env = &cpu->env;
+
+    return env->tsc_khz != 0;
+}
+
+static const VMStateDescription vmstate_tsc_khz = {
+    .name = "cpu/tsc_khz",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = tsc_khz_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_INT64(env.tsc_khz, X86CPU),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 VMStateDescription vmstate_x86_cpu = {
     .name = "cpu",
     .version_id = 12,
@@ -871,6 +890,7 @@ VMStateDescription vmstate_x86_cpu = {
         &vmstate_msr_hyperv_crash,
         &vmstate_avx512,
         &vmstate_xss,
+        &vmstate_tsc_khz,
         NULL
     }
 };
-- 
2.4.8

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