diff options
| author | Himanshu Chauhan <hchauhan@ventanamicro.com> | 2023-06-05 22:15:48 +0530 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2023-06-13 17:45:30 +1000 |
| commit | a574b27af4fe340684ca9f20560a1b01905e4364 (patch) | |
| tree | 9c1053cadf1deb1faa99991dafd05ceed32d7d82 /target/riscv | |
| parent | 949b6bcb27295eb04350afac32a45b698fc50104 (diff) | |
target/riscv: Smepmp: Return error when access permission not allowed in PMP
On an address match, skip checking for default permissions and return error
based on access defined in PMP configuration.
v3 Changes:
o Removed explicit return of boolean value from comparision
of priv/allowed_priv
v2 Changes:
o Removed goto to return in place when address matches
o Call pmp_hart_has_privs_default at the end of the loop
Fixes: 90b1fafce06 ("target/riscv: Smepmp: Skip applying default rules when address matches")
Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Message-Id: <20230605164548.715336-1-hchauhan@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'target/riscv')
| -rw-r--r-- | target/riscv/pmp.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index 418738afd8..9d8db493e6 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -291,7 +291,6 @@ bool pmp_hart_has_privs(CPURISCVState *env, target_ulong addr, pmp_priv_t *allowed_privs, target_ulong mode) { int i = 0; - bool ret = false; int pmp_size = 0; target_ulong s = 0; target_ulong e = 0; @@ -435,17 +434,12 @@ bool pmp_hart_has_privs(CPURISCVState *env, target_ulong addr, * defined with PMP must be used. We shouldn't fallback on * finding default privileges. */ - ret = true; - break; + return (privs & *allowed_privs) == privs; } } /* No rule matched */ - if (!ret) { - ret = pmp_hart_has_privs_default(env, privs, allowed_privs, mode); - } - - return ret; + return pmp_hart_has_privs_default(env, privs, allowed_privs, mode); } /* |