[PATCH 1/1] target/riscv: correct csr_ops[CSR_MSECCFG]

[Heinrich Schuchardt]

The CSR register mseccfg is used by multiple extensions: Smepm and Zkr.

Consider this when checking the existence of the register.

Fixes: 77442380ecbe ("target/riscv: rvk: add CSR support for Zkr")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
---
 target/riscv/csr.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 4b4ab56c40..07c0cfb7d8 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -523,11 +523,14 @@ static RISCVException pmp(CPURISCVState *env, int csrno)
     return RISCV_EXCP_ILLEGAL_INST;
 }
 
-static RISCVException epmp(CPURISCVState *env, int csrno)
+static RISCVException have_mseccfg(CPURISCVState *env, int csrno)
 {
     if (riscv_cpu_cfg(env)->epmp) {
         return RISCV_EXCP_NONE;
     }
+    if (riscv_cpu_cfg(env)->ext_zkr) {
+        return RISCV_EXCP_NONE;
+    }
 
     return RISCV_EXCP_ILLEGAL_INST;
 }
@@ -4379,7 +4382,7 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = {
     [CSR_VSIPH]       = { "vsiph",       aia_hmode32, NULL, NULL, rmw_vsiph },
 
     /* Physical Memory Protection */
-    [CSR_MSECCFG]    = { "mseccfg",  epmp, read_mseccfg, write_mseccfg,
+    [CSR_MSECCFG]    = { "mseccfg",   have_mseccfg, read_mseccfg, 
write_mseccfg,
                          .min_priv_ver = PRIV_VERSION_1_11_0           },
     [CSR_PMPCFG0]    = { "pmpcfg0",   pmp, read_pmpcfg,  write_pmpcfg  },
     [CSR_PMPCFG1]    = { "pmpcfg1",   pmp, read_pmpcfg,  write_pmpcfg  },
-- 
2.40.1