[PATCH 13/18] target/riscv: Allow debugger to access seed CSR

[Bin Meng]

At present seed CSR is not reported in the CSR XML hence gdb cannot
access it.

Fix it by addding a debugger check in its predicate() routine.

Signed-off-by: Bin Meng <bm...@tinylab.org>
---

 target/riscv/csr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 515b05348b..f1075b5728 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -458,6 +458,10 @@ static RISCVException seed(CPURISCVState *env, int csrno)
     }
 
 #if !defined(CONFIG_USER_ONLY)
+    if (env->debugger) {
+        return RISCV_EXCP_NONE;
+    }
+
     /*
      * With a CSR read-write instruction:
      * 1) The seed CSR is always available in machine mode as normal.
-- 
2.25.1