kernel/linux.git - Linux kernel stable tree (mirror)

Age	Commit message (Collapse)	Author	Files	Lines
2023-10-19	drivers/perf: hisi: use cpuhp_state_remove_instance_nocalls() for ↵	Hao Chen	1	-4/+4
	hisi_hns3_pmu uninit process When tearing down a 'hisi_hns3' PMU, we mistakenly run the CPU hotplug callbacks after the device has been unregistered, leading to fireworks when we try to execute empty function callbacks within the driver: \| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 \| CPU: 0 PID: 15 Comm: cpuhp/0 Tainted: G W O 5.12.0-rc4+ #1 \| Hardware name: , BIOS KpxxxFPGA 1P B600 V143 04/22/2021 \| pstate: 80400009 (Nzcv daif +PAN -UAO -TCO BTYPE=--) \| pc : perf_pmu_migrate_context+0x98/0x38c \| lr : perf_pmu_migrate_context+0x94/0x38c \| \| Call trace: \| perf_pmu_migrate_context+0x98/0x38c \| hisi_hns3_pmu_offline_cpu+0x104/0x12c [hisi_hns3_pmu] Use cpuhp_state_remove_instance_nocalls() instead of cpuhp_state_remove_instance() so that the notifiers don't execute after the PMU device has been unregistered. Fixes: 66637ab137b4 ("drivers/perf: hisi: add driver for HNS3 PMU") Signed-off-by: Hao Chen <chenhao418@huawei.com> Signed-off-by: Jijie Shao <shaojijie@huawei.com> Reviewed-by: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/20231019091352.998964-1-shaojijie@huawei.com [will: Rewrote commit message] Signed-off-by: Will Deacon <will@kernel.org>
2022-07-06	drivers/perf: hisi: add driver for HNS3 PMU	Guangbin Huang	1	-0/+1671
	HNS3(HiSilicon Network System 3) PMU is RCiEP device in HiSilicon SoC NIC, supports collection of performance statistics such as bandwidth, latency, packet rate and interrupt rate. NIC of each SICL has one PMU device for it. Driver registers each PMU device to perf, and exports information of supported events, filter mode of each event, bdf range, hardware clock frequency, identifier and so on via sysfs. Each PMU device has its own registers of control, counters and interrupt, and it supports 8 hardware events, each hardward event has its own registers for configuration, counters and interrupt. Filter options contains: config - select event port - select physical port of nic tc - select tc(must be used with port) func - select PF/VF queue - select queue of PF/VF(must be used with func) intr - select interrupt number(must be used with func) global - select all functions of IO DIE Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com> Reviewed-by: John Garry <john.garry@huawei.com> Reviewed-by: Shaokun Zhang <zhangshaokun@hisilicon.com> Link: https://lore.kernel.org/r/20220628063419.38514-3-huangguangbin2@huawei.com Signed-off-by: Will Deacon <will@kernel.org>