Host YongFeng CPU has 0x1f leaf by default, so that enable it for
Guest CPU by default as well.

Suggested-by: Ewan Hai <ewanhai-oc@zhaoxin.com>
Tested-by: Yi Lai <yi1.lai@intel.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
Changes Since v1:
 * New patch suggested by Ewan.
---
 target/i386/cpu.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 44394fa72248..8d67cadec2f2 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6543,8 +6543,11 @@ static const X86CPUDefinition builtin_x86_defs[] = {
             },
             {
                 .version = 3,
-                .note = "with the cache model",
+                .note = "with the cache model and 0x1f leaf",
                 .cache_info = &yongfeng_cache_info,
+                .props = (PropValue[]) {
+                    { "x-force-cpuid-0x1f", "on" },
+                }
             },
             { /* end of list */ }
         }
-- 
2.34.1