From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>

Make TLBSX write-only and guest-error log reads from it.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
 target/microblaze/mmu.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/target/microblaze/mmu.c b/target/microblaze/mmu.c
index a0f06758f8..8391811900 100644
--- a/target/microblaze/mmu.c
+++ b/target/microblaze/mmu.c
@@ -182,7 +182,7 @@ done:
 uint32_t mmu_read(CPUMBState *env, uint32_t rn)
 {
     unsigned int i;
-    uint32_t r;
+    uint32_t r = 0;
 
     if (env->mmu.c_mmu < 2 || !env->mmu.c_mmu_tlb_access) {
         qemu_log_mask(LOG_GUEST_ERROR, "MMU access on MMU-less system\n");
@@ -211,6 +211,9 @@ uint32_t mmu_read(CPUMBState *env, uint32_t rn)
             }
             r = env->mmu.regs[rn];
             break;
+        case MMU_R_TLBSX:
+            qemu_log_mask(LOG_GUEST_ERROR, "TLBSX is write-only.\n");
+            break;
         default:
             r = env->mmu.regs[rn];
             break;
-- 
2.14.1