s5: Add ramoops shell script to vendor

Bug: 147082732
Test: Encrypt and decrypt ramoops successfully
Change-Id: Ie7caf943e3e1ff3db664d6b14c06b93a7700f0ae
Signed-off-by: achigoliu <achigoliu@google.com>

device.mk

@@ -114,6 +114,7 @@ PRODUCT_COPY_FILES += \
     $(LOCAL_PATH)/sensors.hals.conf:$(TARGET_COPY_OUT_VENDOR)/etc/sensors/hals.conf \
     $(LOCAL_PATH)/thermal-engine-$(PRODUCT_HARDWARE).conf:$(TARGET_COPY_OUT_VENDOR)/etc/thermal-engine-$(PRODUCT_HARDWARE).conf \
     $(LOCAL_PATH)/ueventd.rc:$(TARGET_COPY_OUT_VENDOR)/ueventd.rc \
+    $(LOCAL_PATH)/init.ramoops.sh:$(TARGET_COPY_OUT_VENDOR)/bin/init.ramoops.sh \
 
 MSM_VIDC_TARGET_LIST := sm6150 # Get the color format from kernel headers
 MASTER_SIDE_CP_TARGET_LIST := sm6150 # ION specific settings

init.ramoops.sh

@@ -0,0 +1,18 @@
+#!/vendor/bin/sh
+
+# Decrypt the keys and write them to the kernel
+ramoops -D
+
+if [ $? -eq 0 ]; then
+    # Pivot (and decrypt)
+    echo 1 > /sys/devices/virtual/ramoops/pstore/use_alt
+else
+    setprop vendor.ramoops.decryption.error $?
+fi
+
+# Trigger remount of pstore regardless of decryption state
+setprop vendor.ramoops.decrypted true
+
+# Generate keys (if none exist), and load the keys to carveout
+ramoops -g -l -c
+