platform_system_sepolicy/private/performanced.te
Inseob Kim 75806ef3c5 Minimize public policy
Ideally, public should only contain APIs (types / attributes) for
vendor. The other statements like allow/neverallow/typeattributes are
regarded as implementation detail for platform and should be in private.

Bug: 232023812
Test: m selinux_policy
Test: diff <(git diff --staged | grep "^-" | cut -b2- | sort) \
           <(git diff --staged | grep "^+" | cut -b2- | sort)
Test: remove comments on plat_sepolicy.cil, replace base_typeattr_*
      to base_typeattr and then compare old and new plat_sepolicy.cil
Change-Id: I5e7d2da4465ab0216de6bacdf03077d37f6ffe12
2024-03-28 00:33:46 +00:00

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typeattribute performanced coredomain;
init_daemon_domain(performanced)
# Needed to check for app permissions.
binder_use(performanced)
binder_call(performanced, system_server)
allow performanced permission_service:service_manager find;
pdx_server(performanced, performance_client)
# TODO: use file caps to obtain sys_nice instead of setuid / setgid.
allow performanced self:global_capability_class_set { setuid setgid sys_nice };
# Access /proc to validate we're only affecting threads in the same thread group.
# Performanced also shields unbound kernel threads. It scans every task in the
# root cpu set, but only affects the kernel threads.
r_dir_file(performanced, { appdomain bufferhubd kernel surfaceflinger })
dontaudit performanced domain:dir read;
allow performanced { appdomain bufferhubd kernel surfaceflinger }:process setsched;
# These /proc accesses only show up in permissive mode but they
# generate a lot of noise in the log.
userdebug_or_eng(`
dontaudit performanced domain:dir open;
dontaudit performanced domain:file { open read getattr };
')
# Access /dev/cpuset/cpuset.cpus
r_dir_file(performanced, cgroup)
r_dir_file(performanced, cgroup_v2)