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Enable MTE in -eng builds on zuma devices.

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MTE is a low overhead tool which enables detection of memory
safety bugs in interactive workloads. See
https://source.android.com/docs/security/test/memory-safety/arm-mte
for background and information.

This change enables MTE by default on -eng builds on zuma
builds.

Co-authored-by: Evgenii Stepanov <eugenis@google.com>
Test: Device boots and no MTE crashes
Test: sanitizer-status mte
Bug: 316398899
Change-Id: Iff5ab9d7031d8b97bf762d85f6760a092631e121
This commit is contained in:
Nick Kralevich
2024-10-10 16:14:20 -07:00
parent bb0ccb1c08
commit 2676f4bf00
3 changed files with 35 additions and 2 deletions
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8
BoardConfig-common.mk
View File

@@ -38,9 +38,17 @@ BOARD_KERNEL_CMDLINE += rcupdate.rcu_expedited=1 rcu_nocbs=all rcutree.enable_rc
BOARD_KERNEL_CMDLINE += swiotlb=1024
BOARD_KERNEL_CMDLINE += cgroup.memory=nokmem
BOARD_KERNEL_CMDLINE += sysctl.kernel.sched_pelt_multiplier=4
ifeq (,$(filter %_fullmte,$(TARGET_PRODUCT)))
ifneq (,$(filter eng,$(TARGET_BUILD_VARIANT)))
BOARD_KERNEL_CMDLINE += kasan=off
BOARD_KERNEL_CMDLINE += bootloader.pixel.MTE_FORCE_ON
ifeq ($(filter memtag_heap,$(SANITIZE_TARGET)),)
SANITIZE_TARGET := $(strip $(SANITIZE_TARGET) memtag_heap)
endif
endif
endif
BOARD_BOOTCONFIG += androidboot.boot_devices=13200000.ufs
TARGET_NO_BOOTLOADER := true

16
conf/init.eng.memtag.rc Normal file
View File

@@ -0,0 +1,16 @@
# MTE in -eng build: litle and mid cores in Sync mode
# Big core in Asymm mode to work around a performance issue (b/266613799)
on init
# Per-core mode overrides.
# Little Cores: sync
write /sys/devices/system/cpu/cpu0/mte_tcf_preferred sync
write /sys/devices/system/cpu/cpu1/mte_tcf_preferred sync
write /sys/devices/system/cpu/cpu2/mte_tcf_preferred sync
write /sys/devices/system/cpu/cpu3/mte_tcf_preferred sync
# Mid Cores: sync
write /sys/devices/system/cpu/cpu4/mte_tcf_preferred sync
write /sys/devices/system/cpu/cpu5/mte_tcf_preferred sync
write /sys/devices/system/cpu/cpu6/mte_tcf_preferred sync
write /sys/devices/system/cpu/cpu7/mte_tcf_preferred sync
# Big Core: asymm
write /sys/devices/system/cpu/cpu8/mte_tcf_preferred asymm

13
device-common.mk
View File

@@ -49,9 +49,10 @@ PRODUCT_PRODUCT_PROPERTIES += \
ro.preventative_fsck = 1
# Indicate that the bootloader supports the MTE developer option switch
# (MISC_MEMTAG_MODE_MEMTAG_ONCE), with the exception of _fullmte products that
# force enable MTE.
# (MISC_MEMTAG_MODE_MEMTAG_ONCE), with the exception of _fullmte products and
# eng products that force enable MTE
ifeq (,$(filter %_fullmte,$(TARGET_PRODUCT)))
ifeq (,$(filter eng,$(TARGET_BUILD_VARIANT)))
PRODUCT_PRODUCT_PROPERTIES += ro.arm64.memtag.bootctl_supported=1
# N.B. persist properties in product Makefiles aren't actually persisted to the data
# partition, so they will actually go away if we remove them here, or if the user
@@ -61,3 +62,11 @@ PRODUCT_PRODUCT_PROPERTIES += persist.arm64.memtag.app.com.google.android.blueto
PRODUCT_PRODUCT_PROPERTIES += persist.arm64.memtag.app.com.android.nfc=off
PRODUCT_PRODUCT_PROPERTIES += persist.arm64.memtag.system_server=off
endif
endif
ifeq (,$(filter %_fullmte,$(TARGET_PRODUCT)))
ifneq (,$(filter eng,$(TARGET_BUILD_VARIANT)))
PRODUCT_COPY_FILES += \
device/google/zuma/conf/init.eng.memtag.rc:$(TARGET_COPY_OUT_VENDOR)/etc/init/init.eng.memtag.rc
endif
endif