[PATCH 2/2] target/arm: Bail out early on 0-length tlb range invalidate

[Idan Horowitz]

If the given range specifies no addresses to be flushed there's no reason
to schedule a function on all CPUs that does nothing.

Signed-off-by: Idan Horowitz <idan.horowitz@gmail.com>
---
 target/arm/helper.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index cfca0f5ba6..1e819835c2 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -4564,6 +4564,10 @@ static void do_rvae_write(CPUARMState *env, uint64_t 
value,
     length = tlbi_aa64_range_get_length(env, value);
     bits = tlbbits_for_regime(env, one_idx, baseaddr);
 
+    if (length == 0) {
+        return;
+    }
+
     if (synced) {
         tlb_flush_range_by_mmuidx_all_cpus_synced(env_cpu(env),
                                                   baseaddr,
-- 
2.33.1