diff mbox series

[v4,10/10] target/riscv: Use a smaller guess size for no-MMU PMP

Message ID d65e90ab8ca5ee29ab26973c86a18549853a98cd.1590598125.git.alistair.francis@wdc.com
State New
Headers show
Series RISC-V Add the OpenTitan Machine | expand

Commit Message

Alistair Francis May 27, 2020, 4:50 p.m. UTC 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/pmp.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

Comments

Bin Meng May 28, 2020, 2:34 a.m. UTC | #1 
On Thu, May 28, 2020 at 12:59 AM Alistair Francis
<alistair.francis@wdc.com> wrote:
>
> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
> ---
>  target/riscv/pmp.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
>

Reviewed-by: Bin Meng <bin.meng@windriver.com>
diff mbox series

Patch

diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c
index 0e6b640fbd..9418660f1b 100644
--- a/target/riscv/pmp.c
+++ b/target/riscv/pmp.c
@@ -233,12 +233,16 @@  bool pmp_hart_has_privs(CPURISCVState *env, target_ulong addr,
         return true;
     }
 
-    /*
-     * if size is unknown (0), assume that all bytes
-     * from addr to the end of the page will be accessed.
-     */
     if (size == 0) {
-        pmp_size = -(addr | TARGET_PAGE_MASK);
+        if (riscv_feature(env, RISCV_FEATURE_MMU)) {
+            /*
+             * If size is unknown (0), assume that all bytes
+             * from addr to the end of the page will be accessed.
+             */
+            pmp_size = -(addr | TARGET_PAGE_MASK);
+        } else {
+            pmp_size = sizeof(target_ulong);
+        }
     } else {
         pmp_size = size;
     }