diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 8e60a122d4..c1956dc29b 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -122,6 +122,7 @@ static const struct isa_ext_data isa_edata_arr[] = {
     ISA_EXT_DATA_ENTRY(zvkned, PRIV_VERSION_1_12_0, ext_zvkned),
     ISA_EXT_DATA_ENTRY(zvknha, PRIV_VERSION_1_12_0, ext_zvknha),
     ISA_EXT_DATA_ENTRY(zvknhb, PRIV_VERSION_1_12_0, ext_zvknhb),
+    ISA_EXT_DATA_ENTRY(zvksed, PRIV_VERSION_1_12_0, ext_zvksed),
     ISA_EXT_DATA_ENTRY(zvksh, PRIV_VERSION_1_12_0, ext_zvksh),
     ISA_EXT_DATA_ENTRY(zhinx, PRIV_VERSION_1_12_0, ext_zhinx),
     ISA_EXT_DATA_ENTRY(zhinxmin, PRIV_VERSION_1_12_0, ext_zhinxmin),
@@ -1200,7 +1201,8 @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
      * in qemu
      */
     if ((cpu->cfg.ext_zvbb || cpu->cfg.ext_zvkg || cpu->cfg.ext_zvkned ||
-         cpu->cfg.ext_zvknha || cpu->cfg.ext_zvksh) && !cpu->cfg.ext_zve32f) {
+         cpu->cfg.ext_zvknha || cpu->cfg.ext_zvksed || cpu->cfg.ext_zvksh) &&
+        !cpu->cfg.ext_zve32f) {
         error_setg(errp,
                    "Vector crypto extensions require V or Zve* extensions");
         return;
diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h
index b125b0b33f..a3ece218bf 100644
--- a/target/riscv/cpu_cfg.h
+++ b/target/riscv/cpu_cfg.h
@@ -89,6 +89,7 @@ struct RISCVCPUConfig {
     bool ext_zvkned;
     bool ext_zvknha;
     bool ext_zvknhb;
+    bool ext_zvksed;
     bool ext_zvksh;
     bool ext_zmmul;
     bool ext_zvfh;
diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index a4fe1ff5ca..16e6726666 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -1244,3 +1244,7 @@ DEF_HELPER_5(vsm3c_vi, void, ptr, ptr, i32, env, i32)
 
 DEF_HELPER_5(vghsh_vv, void, ptr, ptr, ptr, env, i32)
 DEF_HELPER_4(vgmul_vv, void, ptr, ptr, env, i32)
+
+DEF_HELPER_5(vsm4k_vi, void, ptr, ptr, i32, env, i32)
+DEF_HELPER_4(vsm4r_vv, void, ptr, ptr, env, i32)
+DEF_HELPER_4(vsm4r_vs, void, ptr, ptr, env, i32)
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index b10497afd3..dab38e23e3 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -961,3 +961,8 @@ vsm3c_vi    101011 1 ..... ..... 010 ..... 1110111 @r_vm_1
 # *** Zvkg vector crypto extension ***
 vghsh_vv    101100 1 ..... ..... 010 ..... 1110111 @r_vm_1
 vgmul_vv    101000 1 ..... 10001 010 ..... 1110111 @r2_vm_1
+
+# *** Zvksed vector crypto extension ***
+vsm4k_vi    100001 1 ..... ..... 010 ..... 1110111 @r_vm_1
+vsm4r_vv    101000 1 ..... 10000 010 ..... 1110111 @r2_vm_1
+vsm4r_vs    101001 1 ..... 10000 010 ..... 1110111 @r2_vm_1
diff --git a/target/riscv/insn_trans/trans_rvvk.c.inc b/target/riscv/insn_trans/trans_rvvk.c.inc
index e5ccb26c45..1de9dcb6eb 100644
--- a/target/riscv/insn_trans/trans_rvvk.c.inc
+++ b/target/riscv/insn_trans/trans_rvvk.c.inc
@@ -540,3 +540,46 @@ static bool vghsh_check(DisasContext *s, arg_rmrr *a)
 }
 
 GEN_VV_UNMASKED_TRANS(vghsh_vv, vghsh_check, ZVKG_EGS)
+
+/*
+ * Zvksed
+ */
+
+#define ZVKSED_EGS 4
+
+static bool zvksed_check(DisasContext *s)
+{
+    int egw_bytes = ZVKSED_EGS << s->sew;
+    return s->cfg_ptr->ext_zvksed == true &&
+           require_rvv(s) &&
+           vext_check_isa_ill(s) &&
+           MAXSZ(s) >= egw_bytes &&
+           s->sew == MO_32;
+}
+
+static bool vsm4k_vi_check(DisasContext *s, arg_rmrr *a)
+{
+    return zvksed_check(s) &&
+           require_align(a->rd, s->lmul) &&
+           require_align(a->rs2, s->lmul);
+}
+
+GEN_VI_UNMASKED_TRANS(vsm4k_vi, vsm4k_vi_check, ZVKSED_EGS)
+
+static bool vsm4r_vv_check(DisasContext *s, arg_rmr *a)
+{
+    return zvksed_check(s) &&
+           require_align(a->rd, s->lmul) &&
+           require_align(a->rs2, s->lmul);
+}
+
+GEN_V_UNMASKED_TRANS(vsm4r_vv, vsm4r_vv_check, ZVKSED_EGS)
+
+static bool vsm4r_vs_check(DisasContext *s, arg_rmr *a)
+{
+    return zvksed_check(s) &&
+           !is_overlapped(a->rd, 1 << MAX(s->lmul, 0), a->rs2, 1) &&
+           require_align(a->rd, s->lmul);
+}
+
+GEN_V_UNMASKED_TRANS(vsm4r_vs, vsm4r_vs_check, ZVKSED_EGS)
diff --git a/target/riscv/vcrypto_helper.c b/target/riscv/vcrypto_helper.c
index 04e6374211..9bdd564438 100644
--- a/target/riscv/vcrypto_helper.c
+++ b/target/riscv/vcrypto_helper.c
@@ -23,6 +23,7 @@
 #include "qemu/bswap.h"
 #include "cpu.h"
 #include "crypto/aes.h"
+#include "crypto/sm4.h"
 #include "exec/memop.h"
 #include "exec/exec-all.h"
 #include "exec/helper-proto.h"
@@ -923,3 +924,129 @@ void HELPER(vgmul_vv)(void *vd_vptr, void *vs2_vptr, CPURISCVState *env,
     vext_set_elems_1s(vd, vta, env->vl * 4, total_elems * 4);
     env->vstart = 0;
 }
+
+void HELPER(vsm4k_vi)(void *vd, void *vs2, uint32_t uimm5, CPURISCVState *env,
+                      uint32_t desc)
+{
+    const uint32_t egs = 4;
+    uint32_t rnd = uimm5 & 0x7;
+    uint32_t group_start = env->vstart / egs;
+    uint32_t group_end = env->vl / egs;
+    uint32_t esz = sizeof(uint32_t);
+    uint32_t total_elems = vext_get_total_elems(env, desc, esz);
+
+    for (uint32_t i = group_start; i < group_end; ++i) {
+        uint32_t vstart = i * egs;
+        uint32_t vend = (i + 1) * egs;
+        uint32_t rk[4] = {0};
+        uint32_t tmp[8] = {0};
+
+        for (uint32_t j = vstart; j < vend; ++j) {
+            rk[j - vstart] = *((uint32_t *)vs2 + H4(j));
+        }
+
+        for (uint32_t j = 0; j < egs; ++j) {
+            tmp[j] = rk[j];
+        }
+
+        for (uint32_t j = 0; j < egs; ++j) {
+            uint32_t b, s;
+            b = tmp[j + 1] ^ tmp[j + 2] ^ tmp[j + 3] ^ sm4_ck[rnd * 4 + j];
+
+            s = sm4_subword(b);
+
+            tmp[j + 4] = tmp[j] ^ (s ^ rol32(s, 13) ^ rol32(s, 23));
+        }
+
+        for (uint32_t j = vstart; j < vend; ++j) {
+            *((uint32_t *)vd + H4(j)) = tmp[egs + (j - vstart)];
+        }
+    }
+
+    env->vstart = 0;
+    /* set tail elements to 1s */
+    vext_set_elems_1s(vd, vext_vta(desc), env->vl * esz, total_elems * esz);
+}
+
+static void do_sm4_round(uint32_t *rk, uint32_t *buf)
+{
+    const uint32_t egs = 4;
+    uint32_t s, b;
+
+    for (uint32_t j = egs; j < egs * 2; ++j) {
+        b = buf[j - 3] ^ buf[j - 2] ^ buf[j - 1] ^ rk[j - 4];
+
+        s = sm4_subword(b);
+
+        buf[j] = buf[j - 4] ^ (s ^ rol32(s, 2) ^ rol32(s, 10) ^ rol32(s, 18) ^
+                               rol32(s, 24));
+    }
+}
+
+void HELPER(vsm4r_vv)(void *vd, void *vs2, CPURISCVState *env, uint32_t desc)
+{
+    const uint32_t egs = 4;
+    uint32_t group_start = env->vstart / egs;
+    uint32_t group_end = env->vl / egs;
+    uint32_t esz = sizeof(uint32_t);
+    uint32_t total_elems = vext_get_total_elems(env, desc, esz);
+
+    for (uint32_t i = group_start; i < group_end; ++i) {
+        uint32_t vstart = i * egs;
+        uint32_t vend = (i + 1) * egs;
+        uint32_t rk[4] = {0};
+        uint32_t tmp[8] = {0};
+
+        for (uint32_t j = vstart; j < vend; ++j) {
+            rk[j - vstart] = *((uint32_t *)vs2 + H4(j));
+        }
+
+        for (uint32_t j = vstart; j < vend; ++j) {
+            tmp[j - vstart] = *((uint32_t *)vd + H4(j));
+        }
+
+        do_sm4_round(rk, tmp);
+
+        for (uint32_t j = vstart; j < vend; ++j) {
+            *((uint32_t *)vd + H4(j)) = tmp[egs + (j - vstart)];
+        }
+    }
+
+    env->vstart = 0;
+    /* set tail elements to 1s */
+    vext_set_elems_1s(vd, vext_vta(desc), env->vl * esz, total_elems * esz);
+}
+
+void HELPER(vsm4r_vs)(void *vd, void *vs2, CPURISCVState *env, uint32_t desc)
+{
+    const uint32_t egs = 4;
+    uint32_t group_start = env->vstart / egs;
+    uint32_t group_end = env->vl / egs;
+    uint32_t esz = sizeof(uint32_t);
+    uint32_t total_elems = vext_get_total_elems(env, desc, esz);
+
+    for (uint32_t i = group_start; i < group_end; ++i) {
+        uint32_t vstart = i * egs;
+        uint32_t vend = (i + 1) * egs;
+        uint32_t rk[4] = {0};
+        uint32_t tmp[8] = {0};
+
+        for (uint32_t j = 0; j < egs; ++j) {
+            rk[j] = *((uint32_t *)vs2 + H4(j));
+        }
+
+        for (uint32_t j = vstart; j < vend; ++j) {
+            tmp[j - vstart] = *((uint32_t *)vd + H4(j));
+        }
+
+        do_sm4_round(rk, tmp);
+
+        for (uint32_t j = vstart; j < vend; ++j) {
+            *((uint32_t *)vd + H4(j)) = tmp[egs + (j - vstart)];
+        }
+    }
+
+    env->vstart = 0;
+    /* set tail elements to 1s */
+    vext_set_elems_1s(vd, vext_vta(desc), env->vl * esz, total_elems * esz);
+}
