commit 58f67ee7424234d65edd9b82deefefea5151e5c5
author Haibo Huang <hhb@google.com> Sun Nov 04 09:50:05 2018 -0800
committer Haibo Huang <hhb@google.com> Mon Nov 19 18:57:50 2018 +0000
tree 699019a52a195a052ce638e18aaadb33b90281e0
parent b4a50b8b433e93150435cc4a8806354f3d60e4be

Writes cpu variant information to dev/

This change adds a command to init.rc to write cpu variant information to a file under dev/

Test: sync to device and make sure corresponding files are created.
Change-Id: Ibf90967f13f72af925c82ff79bd973ef4cdc4068

rootdir/init.rc

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 636daea..349168e 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -269,6 +269,12 @@
     # that they can be chown'd to system:system later on boot
     write /sys/class/leds/vibrator/trigger "transient"
 
+    # This is used by Bionic to select optimized routines.
+    write /dev/cpu_variant:${ro.bionic.arch} ${ro.bionic.cpu_variant}
+    chmod 0444 /dev/cpu_variant:${ro.bionic.arch}
+    write /dev/cpu_variant:${ro.bionic.2nd_arch} ${ro.bionic.2nd_cpu_variant}
+    chmod 0444 /dev/cpu_variant:${ro.bionic.2nd_arch}
+
     # Setup APEX mount point and its security context
     mount tmpfs tmpfs /apex nodev noexec nosuid
     chmod 0755 /apex