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(). ... --- arch/parisc/kernel/process.c | 295 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 295 insertions(+) create mode 100644 arch/parisc/kernel/process.c (limited to 'arch/parisc/kernel/process.c') diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c new file mode 100644 index 000000000..c064719b4 --- /dev/null +++ b/arch/parisc/kernel/process.c @@ -0,0 +1,295 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * PARISC Architecture-dependent parts of process handling + * based on the work for i386 + * + * Copyright (C) 1999-2003 Matthew Wilcox + * Copyright (C) 2000 Martin K Petersen + * Copyright (C) 2000 John Marvin + * Copyright (C) 2000 David Huggins-Daines + * Copyright (C) 2000-2003 Paul Bame + * Copyright (C) 2000 Philipp Rumpf + * Copyright (C) 2000 David Kennedy + * Copyright (C) 2000 Richard Hirst + * Copyright (C) 2000 Grant Grundler + * Copyright (C) 2001 Alan Modra + * Copyright (C) 2001-2002 Ryan Bradetich + * Copyright (C) 2001-2014 Helge Deller + * Copyright (C) 2002 Randolph Chung + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#define COMMAND_GLOBAL F_EXTEND(0xfffe0030) +#define CMD_RESET 5 /* reset any module */ + +/* +** The Wright Brothers and Gecko systems have a H/W problem +** (Lasi...'nuf said) may cause a broadcast reset to lockup +** the system. An HVERSION dependent PDC call was developed +** to perform a "safe", platform specific broadcast reset instead +** of kludging up all the code. +** +** Older machines which do not implement PDC_BROADCAST_RESET will +** return (with an error) and the regular broadcast reset can be +** issued. Obviously, if the PDC does implement PDC_BROADCAST_RESET +** the PDC call will not return (the system will be reset). +*/ +void machine_restart(char *cmd) +{ +#ifdef FASTBOOT_SELFTEST_SUPPORT + /* + ** If user has modified the Firmware Selftest Bitmap, + ** run the tests specified in the bitmap after the + ** system is rebooted w/PDC_DO_RESET. + ** + ** ftc_bitmap = 0x1AUL "Skip destructive memory tests" + ** + ** Using "directed resets" at each processor with the MEM_TOC + ** vector cleared will also avoid running destructive + ** memory self tests. (Not implemented yet) + */ + if (ftc_bitmap) { + pdc_do_firm_test_reset(ftc_bitmap); + } +#endif + /* set up a new led state on systems shipped with a LED State panel */ + pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN); + + /* "Normal" system reset */ + pdc_do_reset(); + + /* Nope...box should reset with just CMD_RESET now */ + gsc_writel(CMD_RESET, COMMAND_GLOBAL); + + /* Wait for RESET to lay us to rest. */ + while (1) ; + +} + +void (*chassis_power_off)(void); + +/* + * This routine is called from sys_reboot to actually turn off the + * machine + */ +void machine_power_off(void) +{ + /* If there is a registered power off handler, call it. */ + if (chassis_power_off) + chassis_power_off(); + + /* Put the soft power button back under hardware control. + * If the user had already pressed the power button, the + * following call will immediately power off. */ + pdc_soft_power_button(0); + + pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN); + + /* ipmi_poweroff may have been installed. */ + do_kernel_power_off(); + + /* It seems we have no way to power the system off via + * software. The user has to press the button himself. */ + + printk(KERN_EMERG "System shut down completed.\n" + "Please power this system off now."); + + /* prevent soft lockup/stalled CPU messages for endless loop. */ + rcu_sysrq_start(); + lockup_detector_soft_poweroff(); + for (;;); +} + +void (*pm_power_off)(void); +EXPORT_SYMBOL(pm_power_off); + +void machine_halt(void) +{ + machine_power_off(); +} + +void flush_thread(void) +{ + /* Only needs to handle fpu stuff or perf monitors. + ** REVISIT: several arches implement a "lazy fpu state". + */ +} + +/* + * Idle thread support + * + * Detect when running on QEMU with SeaBIOS PDC Firmware and let + * QEMU idle the host too. + */ + +int running_on_qemu __ro_after_init; +EXPORT_SYMBOL(running_on_qemu); + +/* + * Called from the idle thread for the CPU which has been shutdown. + */ +void arch_cpu_idle_dead(void) +{ +#ifdef CONFIG_HOTPLUG_CPU + idle_task_exit(); + + local_irq_disable(); + + /* Tell __cpu_die() that this CPU is now safe to dispose of. */ + (void)cpu_report_death(); + + /* Ensure that the cache lines are written out. */ + flush_cache_all_local(); + flush_tlb_all_local(NULL); + + /* Let PDC firmware put CPU into firmware idle loop. */ + __pdc_cpu_rendezvous(); + + pr_warn("PDC does not provide rendezvous function.\n"); +#endif + while (1); +} + +void __cpuidle arch_cpu_idle(void) +{ + /* nop on real hardware, qemu will idle sleep. */ + asm volatile("or %%r10,%%r10,%%r10\n":::); +} + +static int __init parisc_idle_init(void) +{ + if (!running_on_qemu) + cpu_idle_poll_ctrl(1); + + return 0; +} +arch_initcall(parisc_idle_init); + +/* + * Copy architecture-specific thread state + */ +int +copy_thread(struct task_struct *p, const struct kernel_clone_args *args) +{ + unsigned long clone_flags = args->flags; + unsigned long usp = args->stack; + unsigned long tls = args->tls; + struct pt_regs *cregs = &(p->thread.regs); + void *stack = task_stack_page(p); + + /* We have to use void * instead of a function pointer, because + * function pointers aren't a pointer to the function on 64-bit. + * Make them const so the compiler knows they live in .text */ + extern void * const ret_from_kernel_thread; + extern void * const child_return; + + if (unlikely(args->fn)) { + /* kernel thread */ + memset(cregs, 0, sizeof(struct pt_regs)); + if (args->idle) /* idle thread */ + return 0; + /* Must exit via ret_from_kernel_thread in order + * to call schedule_tail() + */ + cregs->ksp = (unsigned long) stack + FRAME_SIZE + PT_SZ_ALGN; + cregs->kpc = (unsigned long) &ret_from_kernel_thread; + /* + * Copy function and argument to be called from + * ret_from_kernel_thread. + */ +#ifdef CONFIG_64BIT + cregs->gr[27] = ((unsigned long *)args->fn)[3]; + cregs->gr[26] = ((unsigned long *)args->fn)[2]; +#else + cregs->gr[26] = (unsigned long) args->fn; +#endif + cregs->gr[25] = (unsigned long) args->fn_arg; + } else { + /* user thread */ + /* usp must be word aligned. This also prevents users from + * passing in the value 1 (which is the signal for a special + * return for a kernel thread) */ + if (usp) { + usp = ALIGN(usp, 4); + if (likely(usp)) + cregs->gr[30] = usp; + } + cregs->ksp = (unsigned long) stack + FRAME_SIZE; + cregs->kpc = (unsigned long) &child_return; + + /* Setup thread TLS area */ + if (clone_flags & CLONE_SETTLS) + cregs->cr27 = tls; + } + + return 0; +} + +unsigned long +__get_wchan(struct task_struct *p) +{ + struct unwind_frame_info info; + unsigned long ip; + int count = 0; + + /* + * These bracket the sleeping functions.. + */ + + unwind_frame_init_from_blocked_task(&info, p); + do { + if (unwind_once(&info) < 0) + return 0; + if (task_is_running(p)) + return 0; + ip = info.ip; + if (!in_sched_functions(ip)) + return ip; + } while (count++ < MAX_UNWIND_ENTRIES); + return 0; +} + +static inline unsigned long brk_rnd(void) +{ + return (get_random_u32() & BRK_RND_MASK) << PAGE_SHIFT; +} + +unsigned long arch_randomize_brk(struct mm_struct *mm) +{ + unsigned long ret = PAGE_ALIGN(mm->brk + brk_rnd()); + + if (ret < mm->brk) + return mm->brk; + return ret; +} -- cgit v1.2.3