Add check for Zvfh and Zvfhmin.

Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
---
 target/riscv/cpu.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index c5c60d9e4d..e9832ea544 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -768,6 +768,20 @@ static void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp)
         return;
     }
 
+    if (cpu->cfg.ext_zvfh) {
+        cpu->cfg.ext_zvfhmin = true;
+    }
+
+    if (cpu->cfg.ext_zvfhmin && !cpu->cfg.ext_zve32f) {
+        error_setg(errp, "Zvfh/Zvfhmin extensions require Zve32f extension");
+        return;
+    }
+
+    if (cpu->cfg.ext_zvfh && !cpu->cfg.ext_zfhmin) {
+        error_setg(errp, "Zvfh extensions requires Zfhmin extension");
+        return;
+    }
+
     /* Set the ISA extensions, checks should have happened above */
     if (cpu->cfg.ext_zhinx) {
         cpu->cfg.ext_zhinxmin = true;
-- 
2.25.1