[PATCH v2 2/9] i386/machine: Use VMSTATE_UINTTL_SUB_ARRAY for vmstate of CPUX86State.regs

[Zhao Liu <zhao1.liu@intel.com>]

Before expanding the number of elements in the CPUX86State.regs array,
first use VMSTATE_UINTTL_SUB_ARRAY for the regs' vmstate to avoid the
type_check_array failure.

VMSTATE_UINTTL_SUB_ARRAY will also be used for subsequently added elements
in regs array.

Tested-by: Xudong Hao <xudong.hao@intel.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
Changes since v1:
 * New patch.
---
 include/migration/cpu.h | 4 ++++
 target/i386/machine.c   | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/migration/cpu.h b/include/migration/cpu.h
index ca7cc0479e79..1335abe22301 100644
--- a/include/migration/cpu.h
+++ b/include/migration/cpu.h
@@ -21,6 +21,8 @@
     VMSTATE_UINT64_V(_f, _s, _v)
 #define VMSTATE_UINTTL_ARRAY_V(_f, _s, _n, _v)                        \
     VMSTATE_UINT64_ARRAY_V(_f, _s, _n, _v)
+#define VMSTATE_UINTTL_SUB_ARRAY(_f, _s, _start, _num)                \
+    VMSTATE_UINT64_SUB_ARRAY(_f, _s, _start, _num)
 #define VMSTATE_UINTTL_2DARRAY_V(_f, _s, _n1, _n2, _v)                \
     VMSTATE_UINT64_2DARRAY_V(_f, _s, _n1, _n2, _v)
 #define VMSTATE_UINTTL_TEST(_f, _s, _t)                               \
@@ -40,6 +42,8 @@
     VMSTATE_UINT32_V(_f, _s, _v)
 #define VMSTATE_UINTTL_ARRAY_V(_f, _s, _n, _v)                        \
     VMSTATE_UINT32_ARRAY_V(_f, _s, _n, _v)
+#define VMSTATE_UINTTL_SUB_ARRAY(_f, _s, _start, _num)                \
+    VMSTATE_UINT32_SUB_ARRAY(_f, _s, _start, _num)
 #define VMSTATE_UINTTL_2DARRAY_V(_f, _s, _n1, _n2, _v)                \
     VMSTATE_UINT32_2DARRAY_V(_f, _s, _n1, _n2, _v)
 #define VMSTATE_UINTTL_TEST(_f, _s, _t)                               \
diff --git a/target/i386/machine.c b/target/i386/machine.c
index 57a968c30db3..0882dc3eb09e 100644
--- a/target/i386/machine.c
+++ b/target/i386/machine.c
@@ -1748,7 +1748,7 @@ const VMStateDescription vmstate_x86_cpu = {
     .pre_save = cpu_pre_save,
     .post_load = cpu_post_load,
     .fields = (const VMStateField[]) {
-        VMSTATE_UINTTL_ARRAY(env.regs, X86CPU, CPU_NB_REGS),
+        VMSTATE_UINTTL_SUB_ARRAY(env.regs, X86CPU, 0, CPU_NB_REGS),
         VMSTATE_UINTTL(env.eip, X86CPU),
         VMSTATE_UINTTL(env.eflags, X86CPU),
         VMSTATE_UINT32(env.hflags, X86CPU),
-- 
2.34.1