[Qemu-devel] [PATCH-4.2 v1 2/6] target/riscv: Remove strict perm checking for CSR R/W

[Alistair Francis <alistair.francis@wdc.com>]

The privledge check based on the CSR address mask 0x300 doesn't work
when using Hypervisor extensions so remove the check

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/csr.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index e0d4586760..af3b762c8b 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -797,9 +797,8 @@ int riscv_csrrw(CPURISCVState *env, int csrno, target_ulong *ret_value,
 
     /* check privileges and return -1 if check fails */
 #if !defined(CONFIG_USER_ONLY)
-    int csr_priv = get_field(csrno, 0x300);
     int read_only = get_field(csrno, 0xC00) == 3;
-    if ((write_mask && read_only) || (env->priv < csr_priv)) {
+    if (write_mask && read_only) {
         return -1;
     }
 #endif
-- 
2.22.0