From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/perf/arm_pmu_platform.c | 245 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 245 insertions(+) create mode 100644 drivers/perf/arm_pmu_platform.c (limited to 'drivers/perf/arm_pmu_platform.c') diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platform.c new file mode 100644 index 000000000..933b96e24 --- /dev/null +++ b/drivers/perf/arm_pmu_platform.c @@ -0,0 +1,245 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * platform_device probing code for ARM performance counters. + * + * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles + * Copyright (C) 2010 ARM Ltd., Will Deacon + */ +#define pr_fmt(fmt) "hw perfevents: " fmt +#define dev_fmt pr_fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static int probe_current_pmu(struct arm_pmu *pmu, + const struct pmu_probe_info *info) +{ + int cpu = get_cpu(); + unsigned int cpuid = read_cpuid_id(); + int ret = -ENODEV; + + pr_info("probing PMU on CPU %d\n", cpu); + + for (; info->init != NULL; info++) { + if ((cpuid & info->mask) != info->cpuid) + continue; + ret = info->init(pmu); + break; + } + + put_cpu(); + return ret; +} + +static int pmu_parse_percpu_irq(struct arm_pmu *pmu, int irq) +{ + int cpu, ret; + struct pmu_hw_events __percpu *hw_events = pmu->hw_events; + + ret = irq_get_percpu_devid_partition(irq, &pmu->supported_cpus); + if (ret) + return ret; + + for_each_cpu(cpu, &pmu->supported_cpus) + per_cpu(hw_events->irq, cpu) = irq; + + return 0; +} + +static bool pmu_has_irq_affinity(struct device_node *node) +{ + return !!of_find_property(node, "interrupt-affinity", NULL); +} + +static int pmu_parse_irq_affinity(struct device *dev, int i) +{ + struct device_node *dn; + int cpu; + + /* + * If we don't have an interrupt-affinity property, we guess irq + * affinity matches our logical CPU order, as we used to assume. + * This is fragile, so we'll warn in pmu_parse_irqs(). + */ + if (!pmu_has_irq_affinity(dev->of_node)) + return i; + + dn = of_parse_phandle(dev->of_node, "interrupt-affinity", i); + if (!dn) { + dev_warn(dev, "failed to parse interrupt-affinity[%d]\n", i); + return -EINVAL; + } + + cpu = of_cpu_node_to_id(dn); + if (cpu < 0) { + dev_warn(dev, "failed to find logical CPU for %pOFn\n", dn); + cpu = nr_cpu_ids; + } + + of_node_put(dn); + + return cpu; +} + +static int pmu_parse_irqs(struct arm_pmu *pmu) +{ + int i = 0, num_irqs; + struct platform_device *pdev = pmu->plat_device; + struct pmu_hw_events __percpu *hw_events = pmu->hw_events; + struct device *dev = &pdev->dev; + + num_irqs = platform_irq_count(pdev); + if (num_irqs < 0) + return dev_err_probe(dev, num_irqs, "unable to count PMU IRQs\n"); + + /* + * In this case we have no idea which CPUs are covered by the PMU. + * To match our prior behaviour, we assume all CPUs in this case. + */ + if (num_irqs == 0) { + dev_warn(dev, "no irqs for PMU, sampling events not supported\n"); + pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT; + cpumask_setall(&pmu->supported_cpus); + return 0; + } + + if (num_irqs == 1) { + int irq = platform_get_irq(pdev, 0); + if ((irq > 0) && irq_is_percpu_devid(irq)) + return pmu_parse_percpu_irq(pmu, irq); + } + + if (nr_cpu_ids != 1 && !pmu_has_irq_affinity(dev->of_node)) + dev_warn(dev, "no interrupt-affinity property, guessing.\n"); + + for (i = 0; i < num_irqs; i++) { + int cpu, irq; + + irq = platform_get_irq(pdev, i); + if (WARN_ON(irq <= 0)) + continue; + + if (irq_is_percpu_devid(irq)) { + dev_warn(dev, "multiple PPIs or mismatched SPI/PPI detected\n"); + return -EINVAL; + } + + cpu = pmu_parse_irq_affinity(dev, i); + if (cpu < 0) + return cpu; + if (cpu >= nr_cpu_ids) + continue; + + if (per_cpu(hw_events->irq, cpu)) { + dev_warn(dev, "multiple PMU IRQs for the same CPU detected\n"); + return -EINVAL; + } + + per_cpu(hw_events->irq, cpu) = irq; + cpumask_set_cpu(cpu, &pmu->supported_cpus); + } + + return 0; +} + +static int armpmu_request_irqs(struct arm_pmu *armpmu) +{ + struct pmu_hw_events __percpu *hw_events = armpmu->hw_events; + int cpu, err = 0; + + for_each_cpu(cpu, &armpmu->supported_cpus) { + int irq = per_cpu(hw_events->irq, cpu); + if (!irq) + continue; + + err = armpmu_request_irq(irq, cpu); + if (err) + break; + } + + return err; +} + +static void armpmu_free_irqs(struct arm_pmu *armpmu) +{ + int cpu; + struct pmu_hw_events __percpu *hw_events = armpmu->hw_events; + + for_each_cpu(cpu, &armpmu->supported_cpus) { + int irq = per_cpu(hw_events->irq, cpu); + + armpmu_free_irq(irq, cpu); + } +} + +int arm_pmu_device_probe(struct platform_device *pdev, + const struct of_device_id *of_table, + const struct pmu_probe_info *probe_table) +{ + armpmu_init_fn init_fn; + struct device *dev = &pdev->dev; + struct arm_pmu *pmu; + int ret = -ENODEV; + + pmu = armpmu_alloc(); + if (!pmu) + return -ENOMEM; + + pmu->plat_device = pdev; + + ret = pmu_parse_irqs(pmu); + if (ret) + goto out_free; + + init_fn = of_device_get_match_data(dev); + if (init_fn) { + pmu->secure_access = of_property_read_bool(dev->of_node, + "secure-reg-access"); + + /* arm64 systems boot only as non-secure */ + if (IS_ENABLED(CONFIG_ARM64) && pmu->secure_access) { + dev_warn(dev, "ignoring \"secure-reg-access\" property for arm64\n"); + pmu->secure_access = false; + } + + ret = init_fn(pmu); + } else if (probe_table) { + cpumask_setall(&pmu->supported_cpus); + ret = probe_current_pmu(pmu, probe_table); + } + + if (ret) { + dev_err(dev, "failed to probe PMU!\n"); + goto out_free; + } + + ret = armpmu_request_irqs(pmu); + if (ret) + goto out_free_irqs; + + ret = armpmu_register(pmu); + if (ret) { + dev_err(dev, "failed to register PMU devices!\n"); + goto out_free_irqs; + } + + return 0; + +out_free_irqs: + armpmu_free_irqs(pmu); +out_free: + armpmu_free(pmu); + return ret; +} -- cgit v1.2.3