From: Alistair Francis <alistair.francis@wdc.com>
Date: Fri, 24 Apr 2020 01:47:38 +0000 (-0700)
Subject: target/riscv: Use a smaller guess size for no-MMU PMP
X-Git-Tag: qemu-xen-4.15.0~124^2~16
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=1145188e091aa4675b09882b6bd500c50b87547f;p=qemu-xen.git

target/riscv: Use a smaller guess size for no-MMU PMP

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bin.meng@windriver.com>
---

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;
     }