[PATCH v5 1/9] target/riscv: add cfg properties for Zc* extension

[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>
Cc: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/riscv/cpu.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 target/riscv/cpu.h |  6 ++++++
 2 files changed, 49 insertions(+)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 042fd541b4..1ab04ab246 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -805,6 +805,49 @@ static void riscv_cpu_realize(DeviceState *dev, 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 extensionrequires 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;
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 9bd539d77a..6e915b6937 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -434,6 +434,12 @@ 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;
-- 
2.25.1