target/riscv/csr.c: use riscv_cpu_cfg() to avoid env_cpu() pointers

A common trend in this file is to retrieve a RISCVCPU pointer by first
retrieving a CPUState pointer via env_cpu(). The CPU pointer is used
only to access the RISCVCPUConfig object and nothing else.

Let's use riscv_cpu_cfg() to access what we need directly without these
2 pointers.

Suggested-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20230224174520.92490-4-dbarboza@ventanamicro.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

1 files changed, 12 insertions, 38 deletions

diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index bf456fe..86e183f 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -46,10 +46,8 @@ static RISCVException smstateen_acc_ok(CPURISCVState *env, int index,
                                        uint64_t bit)
 {
     bool virt = riscv_cpu_virt_enabled(env);
-    CPUState *cs = env_cpu(env);
-    RISCVCPU *cpu = RISCV_CPU(cs);
 
-    if (env->priv == PRV_M || !cpu->cfg.ext_smstateen) {
+    if (env->priv == PRV_M || !riscv_cpu_cfg(env)->ext_smstateen) {
         return RISCV_EXCP_NONE;
     }
 
@@ -81,7 +79,7 @@ static RISCVException fs(CPURISCVState *env, int csrno)
 {
 #if !defined(CONFIG_USER_ONLY)
     if (!env->debugger && !riscv_cpu_fp_enabled(env) &&
-        !RISCV_CPU(env_cpu(env))->cfg.ext_zfinx) {
+        !riscv_cpu_cfg(env)->ext_zfinx) {
         return RISCV_EXCP_ILLEGAL_INST;
     }
 #endif
@@ -90,11 +88,9 @@ static RISCVException fs(CPURISCVState *env, int csrno)
 
 static RISCVException vs(CPURISCVState *env, int csrno)
 {
-    CPUState *cs = env_cpu(env);
-    RISCVCPU *cpu = RISCV_CPU(cs);
-
     if (env->misa_ext & RVV ||
-        cpu->cfg.ext_zve32f || cpu->cfg.ext_zve64f) {
+        riscv_cpu_cfg(env)->ext_zve32f ||
+        riscv_cpu_cfg(env)->ext_zve64f) {
 #if !defined(CONFIG_USER_ONLY)
         if (!env->debugger && !riscv_cpu_vector_enabled(env)) {
             return RISCV_EXCP_ILLEGAL_INST;
@@ -193,10 +189,7 @@ static RISCVException mctr32(CPURISCVState *env, int csrno)
 
 static RISCVException sscofpmf(CPURISCVState *env, int csrno)
 {
-    CPUState *cs = env_cpu(env);
-    RISCVCPU *cpu = RISCV_CPU(cs);
-
-    if (!cpu->cfg.ext_sscofpmf) {
+    if (!riscv_cpu_cfg(env)->ext_sscofpmf) {
         return RISCV_EXCP_ILLEGAL_INST;
     }
 
@@ -319,10 +312,7 @@ static RISCVException umode32(CPURISCVState *env, int csrno)
 
 static RISCVException mstateen(CPURISCVState *env, int csrno)
 {
-    CPUState *cs = env_cpu(env);
-    RISCVCPU *cpu = RISCV_CPU(cs);
-
-    if (!cpu->cfg.ext_smstateen) {
+    if (!riscv_cpu_cfg(env)->ext_smstateen) {
         return RISCV_EXCP_ILLEGAL_INST;
     }
 
@@ -331,10 +321,7 @@ static RISCVException mstateen(CPURISCVState *env, int csrno)
 
 static RISCVException hstateen_pred(CPURISCVState *env, int csrno, int base)
 {
-    CPUState *cs = env_cpu(env);
-    RISCVCPU *cpu = RISCV_CPU(cs);
-
-    if (!cpu->cfg.ext_smstateen) {
+    if (!riscv_cpu_cfg(env)->ext_smstateen) {
         return RISCV_EXCP_ILLEGAL_INST;
     }
 
@@ -361,10 +348,8 @@ static RISCVException sstateen(CPURISCVState *env, int csrno)
 {
     bool virt = riscv_cpu_virt_enabled(env);
     int index = csrno - CSR_SSTATEEN0;
-    CPUState *cs = env_cpu(env);
-    RISCVCPU *cpu = RISCV_CPU(cs);
 
-    if (!cpu->cfg.ext_smstateen) {
+    if (!riscv_cpu_cfg(env)->ext_smstateen) {
         return RISCV_EXCP_ILLEGAL_INST;
     }
 
@@ -916,11 +901,9 @@ static RISCVException read_timeh(CPURISCVState *env, int csrno,
 
 static RISCVException sstc(CPURISCVState *env, int csrno)
 {
-    CPUState *cs = env_cpu(env);
-    RISCVCPU *cpu = RISCV_CPU(cs);
     bool hmode_check = false;
 
-    if (!cpu->cfg.ext_sstc || !env->rdtime_fn) {
+    if (!riscv_cpu_cfg(env)->ext_sstc || !env->rdtime_fn) {
         return RISCV_EXCP_ILLEGAL_INST;
     }
 
@@ -1150,30 +1133,21 @@ static RISCVException write_ignore(CPURISCVState *env, int csrno,
 static RISCVException read_mvendorid(CPURISCVState *env, int csrno,
                                      target_ulong *val)
 {
-    CPUState *cs = env_cpu(env);
-    RISCVCPU *cpu = RISCV_CPU(cs);
-
-    *val = cpu->cfg.mvendorid;
+    *val = riscv_cpu_cfg(env)->mvendorid;
     return RISCV_EXCP_NONE;
 }
 
 static RISCVException read_marchid(CPURISCVState *env, int csrno,
                                    target_ulong *val)
 {
-    CPUState *cs = env_cpu(env);
-    RISCVCPU *cpu = RISCV_CPU(cs);
-
-    *val = cpu->cfg.marchid;
+    *val = riscv_cpu_cfg(env)->marchid;
     return RISCV_EXCP_NONE;
 }
 
 static RISCVException read_mimpid(CPURISCVState *env, int csrno,
                                   target_ulong *val)
 {
-    CPUState *cs = env_cpu(env);
-    RISCVCPU *cpu = RISCV_CPU(cs);
-
-    *val = cpu->cfg.mimpid;
+    *val = riscv_cpu_cfg(env)->mimpid;
     return RISCV_EXCP_NONE;
 }