xavi/android_kernel_m2note/arch/arm64/kernel/perf_event.c, branch o-8.1

Get rid of __cpuinit

2017-04-11T09:00:11+00:00

This commit is the result of find . -name '*.c' | xargs sed -i 's/ __cpuinit / /g' find . -name '*.c' | xargs sed -i 's/ __cpuexit / /g' find . -name '*.c' | xargs sed -i 's/ __cpuinitdata / /g' find . -name '*.c' | xargs sed -i 's/ __cpuinit$//g' find ./arch/ -name '*.h' | xargs sed -i 's/ __cpuinit//g' find . -name '*.c' | xargs sed -i 's/^__cpuinit //g' find . -name '*.c' | xargs sed -i 's/^__cpuinitdata //g' find . -name '*.c' | xargs sed -i 's/\*__cpuinit /\*/g' find . -name '*.c' | xargs sed -i 's/ __cpuinitconst / /g' find . -name '*.h' | xargs sed -i 's/ __cpuinit / /g' find . -name '*.h' | xargs sed -i 's/ __cpuinitdata / /g' git add . git reset include/linux/init.h git checkout -- include/linux/init.h based off : https://github.com/jollaman999/jolla-kernel_bullhead/commit/bc15db84a622eed7d61d3ece579b577154d0ec29

arm64: perf: reject groups spanning multiple HW PMUs

2016-11-07T12:46:53+00:00

The perf core implicitly rejects events spanning multiple HW PMUs, as in these cases the event->ctx will differ. However this validation is performed after pmu::event_init() is called in perf_init_event(), and thus pmu::event_init() may be called with a group leader from a different HW PMU. The ARM64 PMU driver does not take this fact into account, and when validating groups assumes that it can call to_arm_pmu(event->pmu) for any HW event. When the event in question is from another HW PMU this is wrong, and results in dereferencing garbage. This patch updates the ARM64 PMU driver to first test for and reject events from other PMUs, moving the to_arm_pmu and related logic after this test. Fixes a crash triggered by perf_fuzzer on Linux-4.0-rc2, with a CCI PMU present: Bad mode in Synchronous Abort handler detected, code 0x86000006 -- IABT (current EL) CPU: 0 PID: 1371 Comm: perf_fuzzer Not tainted 3.19.0+ #249 Hardware name: V2F-1XV7 Cortex-A53x2 SMM (DT) task: ffffffc07c73a280 ti: ffffffc07b0a0000 task.ti: ffffffc07b0a0000 PC is at 0x0 LR is at validate_event+0x90/0xa8 pc : [<0000000000000000>] lr : [] pstate: 00000145 sp : ffffffc07b0a3ba0 [< (null)>] (null) [] armpmu_event_init+0x174/0x3cc [] perf_try_init_event+0x34/0x70 [] perf_init_event+0xe0/0x10c [] perf_event_alloc+0x288/0x358 [] SyS_perf_event_open+0x464/0x98c Code: bad PC value Also cleans up the code to use the arm_pmu only when we know that we are dealing with an arm pmu event. Cc: Will Deacon Acked-by: Mark Rutland Acked-by: Peter Ziljstra (Intel) Signed-off-by: Suzuki K. Poulose Signed-off-by: Will Deacon

arm64: kernel: perf: add cpu hotplug notifier

2016-11-07T12:46:49+00:00

When a CPU is taken offline, its PMU registers content is lost and needs to be reset on power up, since for most of the PMU registers content is UNKNOWN upon CPU reset. This patch implements a cpu hotplug notifier and hooks the reset call in the respective notifier callback function. Cc: Will Deacon Cc: Mark Rutland Signed-off-by: Lorenzo Pieralisi Change-Id: I779158c4edb4e88f15d9bfebf6cf8af208a64259 Ticket: PORRIDGE-450

first commit

2016-08-15T02:19:42+00:00