[Qemu-devel] [PATCH v1 5/5] target-microblaze: mmu: Make the TLBX MISS bit read-only

[Edgar E. Iglesias]

From: "Edgar E. Iglesias" <address@hidden>

Make the TLBX MISS bit read-only.

Signed-off-by: Edgar E. Iglesias <address@hidden>
---
 target/microblaze/mmu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/microblaze/mmu.c b/target/microblaze/mmu.c
index 8391811900..9d5e6aa8a5 100644
--- a/target/microblaze/mmu.c
+++ b/target/microblaze/mmu.c
@@ -273,6 +273,10 @@ void mmu_write(CPUMBState *env, uint32_t rn, uint32_t v)
                 env->mmu.regs[rn] = v;
             }
             break;
+        case MMU_R_TLBX:
+            /* Bit 31 is read-only.  */
+            env->mmu.regs[rn] = deposit32(env->mmu.regs[rn], 0, 31, v);
+            break;
         case MMU_R_TLBSX:
         {
             struct microblaze_mmu_lookup lu;
-- 
2.14.1