---
 target/riscv/cpu.c | 1 +
 target/riscv/cpu.h | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 0bbfd7f457..4e305249b3 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -516,6 +516,7 @@ static Property riscv_cpu_properties[] = {
     DEFINE_PROP_BOOL("u", RISCVCPU, cfg.ext_u, true),
     /* This is experimental so mark with 'x-' */
     DEFINE_PROP_BOOL("x-h", RISCVCPU, cfg.ext_h, false),
+    DEFINE_PROP_BOOL("x-j", RISCVCPU, cfg.ext_j, false),
     DEFINE_PROP_BOOL("x-v", RISCVCPU, cfg.ext_v, false),
     DEFINE_PROP_BOOL("Counters", RISCVCPU, cfg.ext_counters, true),
     DEFINE_PROP_BOOL("Zifencei", RISCVCPU, cfg.ext_ifencei, true),
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index de275782e6..eca611a367 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -66,6 +66,7 @@
 #define RVS RV('S')
 #define RVU RV('U')
 #define RVH RV('H')
+#define RVJ RV('J')
 
 /* S extension denotes that Supervisor mode exists, however it is possible
    to have a core that support S mode but does not have an MMU and there
@@ -277,6 +278,7 @@ struct RISCVCPU {
         bool ext_s;
         bool ext_u;
         bool ext_h;
+        bool ext_j;
         bool ext_v;
         bool ext_counters;
         bool ext_ifencei;
-- 
2.20.1