tests: Exclude ARM KVM tests from nightly run

Our Jenkin's server is an X86 host and cannot run ARM KVM.

Change-Id: Id10988aefa2534e73407c6a241fb3d5c9d958b7c
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/64111
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
diff --git a/tests/nightly.sh b/tests/nightly.sh
index dc871f6..a503e9e 100755
--- a/tests/nightly.sh
+++ b/tests/nightly.sh
@@ -115,7 +115,8 @@
 cd "${gem5_root}/tests"
 ./main.py run -j${compile_threads} -vv \
     --exclude-tags ".*" --include-tags kvm --exclude-tags very\-long \
-    --exclude-tags debug --exclude-tags fast --exclude-tags ARM
+    --exclude-tags debug --exclude-tags fast --exclude-tags ARM \
+    --exclude-tags aarch64
 cd "${gem5_root}"
 
 # For the GPU tests we compile and run the GPU ISA inside a gcn-gpu container.