From: stove <[email protected]>
Commit 38c83e8d3a33 ("target/riscv: raise an exception when CSRRS/CSRRC
writes a read-only CSR") changed the behavior of riscv_csrrw, which
would formerly be treated as read-only if the write mask were set to 0.
Fixes an exception being raised when accessing read-only vector CSRs
like vtype.
Fixes: 38c83e8d3a33 ("target/riscv: raise an exception when CSRRS/CSRRC writes
a read-only CSR")
Signed-off-by: stove <[email protected]>
Reviewed-by: Daniel Henrique Barboza <[email protected]>
Message-ID: <[email protected]>
Signed-off-by: Alistair Francis <[email protected]>
---
target/riscv/cpu.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 738e68fa6e..2c2266415e 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -874,7 +874,7 @@ static inline void riscv_csr_write(CPURISCVState *env, int
csrno,
static inline target_ulong riscv_csr_read(CPURISCVState *env, int csrno)
{
target_ulong val = 0;
- riscv_csrrw(env, csrno, &val, 0, 0, 0);
+ riscv_csrr(env, csrno, &val);
return val;
}
--
2.51.0
