[PULL 09/89] target/riscv: add cfg properties for Zc* extension

[Alistair Francis]

From: Weiwei Li <liweiwei@iscas.ac.cn>

Add properties for Zca,Zcb,Zcf,Zcd,Zcmp,Zcmt extension.
Add check for these properties.

Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230307081403.61950-2-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h |  6 ++++++
 target/riscv/cpu.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 5adefe4ab5..e5f7c860d1 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -438,6 +438,12 @@ struct RISCVCPUConfig {
     bool ext_zbkc;
     bool ext_zbkx;
     bool ext_zbs;
+    bool ext_zca;
+    bool ext_zcb;
+    bool ext_zcd;
+    bool ext_zcf;
+    bool ext_zcmp;
+    bool ext_zcmt;
     bool ext_zk;
     bool ext_zkn;
     bool ext_zknd;
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index cea0d3cbdd..97b0a77d8e 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -939,6 +939,49 @@ static void riscv_cpu_validate_set_extensions(RISCVCPU 
*cpu, Error **errp)
         }
     }
 
+    if (cpu->cfg.ext_c) {
+        cpu->cfg.ext_zca = true;
+        if (cpu->cfg.ext_f && env->misa_mxl_max == MXL_RV32) {
+            cpu->cfg.ext_zcf = true;
+        }
+        if (cpu->cfg.ext_d) {
+            cpu->cfg.ext_zcd = true;
+        }
+    }
+
+    if (env->misa_mxl_max != MXL_RV32 && cpu->cfg.ext_zcf) {
+        error_setg(errp, "Zcf extension is only relevant to RV32");
+        return;
+    }
+
+    if (!cpu->cfg.ext_f && cpu->cfg.ext_zcf) {
+        error_setg(errp, "Zcf extension requires F extension");
+        return;
+    }
+
+    if (!cpu->cfg.ext_d && cpu->cfg.ext_zcd) {
+        error_setg(errp, "Zcd extension requires D extension");
+        return;
+    }
+
+    if ((cpu->cfg.ext_zcf || cpu->cfg.ext_zcd || cpu->cfg.ext_zcb ||
+         cpu->cfg.ext_zcmp || cpu->cfg.ext_zcmt) && !cpu->cfg.ext_zca) {
+        error_setg(errp, "Zcf/Zcd/Zcb/Zcmp/Zcmt extensions require Zca "
+                         "extension");
+        return;
+    }
+
+    if (cpu->cfg.ext_zcd && (cpu->cfg.ext_zcmp || cpu->cfg.ext_zcmt)) {
+        error_setg(errp, "Zcmp/Zcmt extensions are incompatible with "
+                         "Zcd extension");
+        return;
+    }
+
+    if (cpu->cfg.ext_zcmt && !cpu->cfg.ext_icsr) {
+        error_setg(errp, "Zcmt extension requires Zicsr extension");
+        return;
+    }
+
     if (cpu->cfg.ext_zk) {
         cpu->cfg.ext_zkn = true;
         cpu->cfg.ext_zkr = true;
-- 
2.40.0