sm6375-common: Make fastrpc_shell_3 publicly available

* Used by GCAM for DSP-accelerated HDR processing
 * Arguably we should label /vendor/dsp/cdsp/fastrpc_shell_3 to
   same_process_hal_file like Pixels, but the partition is prebuilt thus
   we're unable to relabel it.
 * Copy the file to writable tmpfs, setup attributes and bind mount back
   to workaround the limitation.

[ghostrider-reborn]:
Allow adsp/cdsprpcd and neuralnetworks HAL to access fastrpc_shell_3

[kras edit:
 1. rename some contexts as per qva/kona
 2. extend to allow camera HAL and VPP service to access it as well]

Co-authored-by: Adithya R <gh0strider.2k18.reborn@gmail.com>
Change-Id: Ide90e5c7307d413db5ece736e859559f06679545

rootdir/etc/init.qcom.rc

@@ -84,6 +84,11 @@ on init
 on post-fs
     chmod 0755 /sys/kernel/debug/tracing
 
+    mkdir /mnt/vendor/dsp 0770 root root
+    copy /vendor/dsp/cdsp/fastrpc_shell_3 /mnt/vendor/dsp/fastrpc_shell_3
+    chmod 0644 /mnt/vendor/dsp/fastrpc_shell_3
+    mount none /mnt/vendor/dsp/fastrpc_shell_3 /vendor/dsp/cdsp/fastrpc_shell_3 bind
+
 on early-boot
     # set RLIMIT_MEMLOCK to 64MB
     setrlimit 8 67108864 67108864

sepolicy/vendor/adsprpcd.te

@@ -1 +1,4 @@
+type public_adsprpcd_file, file_type;
+
+r_dir_file(vendor_adsprpcd, public_adsprpcd_file)
 r_dir_file(vendor_adsprpcd, vendor_sysfs_graphics)

sepolicy/vendor/app.te

@@ -1,2 +1,5 @@
 get_prop({ appdomain -isolated_app }, vendor_fingerprint_prop)
-get_prop({ appdomain -isolated_app }, vendor_tee_listener_prop)
+get_prop({ appdomain -isolated_app }, vendor_tee_listener_prop)
+
+allow { appdomain -isolated_app } adsprpcd_file:dir r_dir_perms;
+allow { appdomain -isolated_app } public_adsprpcd_file:file r_file_perms;

sepolicy/vendor/cdsprpcd.te

@@ -0,0 +1 @@
+r_dir_file(vendor_cdsprpcd, public_adsprpcd_file)

sepolicy/vendor/file_contexts

@@ -15,6 +15,11 @@
 # Camera
 /mnt/vendor/persist/camera(/.*)?							u:object_r:camera_persist_file:s0
 
+# Hexagon DSP-side executable needed for Halide operation
+# This is labeled as public_adsprpcd_file as it needs to be read by apps
+# (e.g. Google Camera App)
+/mnt/vendor/dsp/fastrpc_shell_3                                         u:object_r:public_adsprpcd_file:s0
+
 # Fingerprint
 /dev/goodix_fp										u:object_r:vendor_fingerprint_device:s0
 /dev/silead_fp										u:object_r:vendor_fingerprint_device:s0

sepolicy/vendor/hal_camera_default.te

@@ -1,2 +1,4 @@
 r_dir_file(hal_camera_default, camera_persist_file)
 set_prop(hal_camera_default, vendor_camera_sensor_prop)
+
+allow hal_camera_default public_adsprpcd_file:file r_file_perms;

sepolicy/vendor/hal_neuralnetworks_default.te

@@ -0,0 +1 @@
+r_dir_file(vendor_hal_neuralnetworks_default, public_adsprpcd_file)

sepolicy/vendor/init.te

@@ -0,0 +1 @@
+allow init adsprpcd_file:file mounton;

sepolicy/vendor/vppservice.te

@@ -0,0 +1 @@
+r_dir_file(vendor_vppservice, public_adsprpcd_file)