target/riscv: Add support for Zve32x extension

Add support for Zve32x extension and replace some checks for Zve32f with
Zve32x, since Zve32f depends on Zve32x.

Signed-off-by: Jason Chien <jason.chien@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-ID: <20240328022343.6871-2-jason.chien@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

target/riscv/cpu.c

@@ -153,6 +153,7 @@ const RISCVIsaExtData isa_edata_arr[] = {
     ISA_EXT_DATA_ENTRY(zvbb, PRIV_VERSION_1_12_0, ext_zvbb),
     ISA_EXT_DATA_ENTRY(zvbc, PRIV_VERSION_1_12_0, ext_zvbc),
     ISA_EXT_DATA_ENTRY(zve32f, PRIV_VERSION_1_10_0, ext_zve32f),
+    ISA_EXT_DATA_ENTRY(zve32x, PRIV_VERSION_1_10_0, ext_zve32x),
     ISA_EXT_DATA_ENTRY(zve64f, PRIV_VERSION_1_10_0, ext_zve64f),
     ISA_EXT_DATA_ENTRY(zve64d, PRIV_VERSION_1_10_0, ext_zve64d),
     ISA_EXT_DATA_ENTRY(zvfbfmin, PRIV_VERSION_1_12_0, ext_zvfbfmin),
@@ -1472,6 +1473,7 @@ const RISCVCPUMultiExtConfig riscv_cpu_extensions[] = {
     MULTI_EXT_CFG_BOOL("zfh", ext_zfh, false),
     MULTI_EXT_CFG_BOOL("zfhmin", ext_zfhmin, false),
     MULTI_EXT_CFG_BOOL("zve32f", ext_zve32f, false),
+    MULTI_EXT_CFG_BOOL("zve32x", ext_zve32x, false),
     MULTI_EXT_CFG_BOOL("zve64f", ext_zve64f, false),
     MULTI_EXT_CFG_BOOL("zve64d", ext_zve64d, false),
     MULTI_EXT_CFG_BOOL("zvfbfmin", ext_zvfbfmin, false),

target/riscv/cpu_cfg.h

@@ -91,6 +91,7 @@ struct RISCVCPUConfig {
     bool ext_zhinx;
     bool ext_zhinxmin;
     bool ext_zve32f;
+    bool ext_zve32x;
     bool ext_zve64f;
     bool ext_zve64d;
     bool ext_zvbb;

target/riscv/cpu_helper.c

@@ -73,7 +73,7 @@ void cpu_get_tb_cpu_state(CPURISCVState *env, vaddr *pc,
     *pc = env->xl == MXL_RV32 ? env->pc & UINT32_MAX : env->pc;
     *cs_base = 0;
 
-    if (cpu->cfg.ext_zve32f) {
+    if (cpu->cfg.ext_zve32x) {
         /*
          * If env->vl equals to VLMAX, we can use generic vector operation
          * expanders (GVEC) to accerlate the vector operations.

target/riscv/csr.c

@@ -93,7 +93,7 @@ static RISCVException fs(CPURISCVState *env, int csrno)
 
 static RISCVException vs(CPURISCVState *env, int csrno)
 {
-    if (riscv_cpu_cfg(env)->ext_zve32f) {
+    if (riscv_cpu_cfg(env)->ext_zve32x) {
 #if !defined(CONFIG_USER_ONLY)
         if (!env->debugger && !riscv_cpu_vector_enabled(env)) {
             return RISCV_EXCP_ILLEGAL_INST;

target/riscv/insn_trans/trans_rvv.c.inc

@@ -149,7 +149,7 @@ static bool do_vsetvl(DisasContext *s, int rd, int rs1, TCGv s2)
 {
     TCGv s1, dst;
 
-    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32f) {
+    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32x) {
         return false;
     }
 
@@ -179,7 +179,7 @@ static bool do_vsetivli(DisasContext *s, int rd, TCGv s1, TCGv s2)
 {
     TCGv dst;
 
-    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32f) {
+    if (!require_rvv(s) || !s->cfg_ptr->ext_zve32x) {
         return false;
     }
 

target/riscv/tcg/tcg-cpu.c

@@ -511,9 +511,13 @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
         return;
     }
 
-    if (cpu->cfg.ext_zve32f && !riscv_has_ext(env, RVF)) {
+    /* The Zve32f extension depends on the Zve32x extension */
-        error_setg(errp, "Zve32f/Zve64f extensions require F extension");
+    if (cpu->cfg.ext_zve32f) {
-        return;
+        if (!riscv_has_ext(env, RVF)) {
+            error_setg(errp, "Zve32f/Zve64f extensions require F extension");
+            return;
+        }
+        cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zve32x), true);
     }
 
     if (cpu->cfg.ext_zvfh) {
@@ -658,13 +662,9 @@ void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
         cpu_cfg_ext_auto_update(cpu, CPU_CFG_OFFSET(ext_zvbc), true);
     }
 
-    /*
-     * In principle Zve*x would also suffice here, were they supported
-     * in qemu
-     */
     if ((cpu->cfg.ext_zvbb || cpu->cfg.ext_zvkb || cpu->cfg.ext_zvkg ||
          cpu->cfg.ext_zvkned || cpu->cfg.ext_zvknha || cpu->cfg.ext_zvksed ||
-         cpu->cfg.ext_zvksh) && !cpu->cfg.ext_zve32f) {
+         cpu->cfg.ext_zvksh) && !cpu->cfg.ext_zve32x) {
         error_setg(errp,
                    "Vector crypto extensions require V or Zve* extensions");
         return;