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/hexagon/kernel/signal.c | 256 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 256 insertions(+) create mode 100644 arch/hexagon/kernel/signal.c (limited to 'arch/hexagon/kernel/signal.c') diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c new file mode 100644 index 000000000..bcba31e9e --- /dev/null +++ b/arch/hexagon/kernel/signal.c @@ -0,0 +1,256 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Signal support for Hexagon processor + * + * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +struct rt_sigframe { + unsigned long tramp[2]; + struct siginfo info; + struct ucontext uc; +}; + +static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, + size_t frame_size) +{ + unsigned long sp = sigsp(regs->r29, ksig); + + return (void __user *)((sp - frame_size) & ~(sizeof(long long) - 1)); +} + +static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc) +{ + unsigned long tmp; + int err = 0; + + err |= copy_to_user(&sc->sc_regs.r0, ®s->r00, + 32*sizeof(unsigned long)); + + err |= __put_user(regs->sa0, &sc->sc_regs.sa0); + err |= __put_user(regs->lc0, &sc->sc_regs.lc0); + err |= __put_user(regs->sa1, &sc->sc_regs.sa1); + err |= __put_user(regs->lc1, &sc->sc_regs.lc1); + err |= __put_user(regs->m0, &sc->sc_regs.m0); + err |= __put_user(regs->m1, &sc->sc_regs.m1); + err |= __put_user(regs->usr, &sc->sc_regs.usr); + err |= __put_user(regs->preds, &sc->sc_regs.p3_0); + err |= __put_user(regs->gp, &sc->sc_regs.gp); + err |= __put_user(regs->ugp, &sc->sc_regs.ugp); +#if CONFIG_HEXAGON_ARCH_VERSION >= 4 + err |= __put_user(regs->cs0, &sc->sc_regs.cs0); + err |= __put_user(regs->cs1, &sc->sc_regs.cs1); +#endif + tmp = pt_elr(regs); err |= __put_user(tmp, &sc->sc_regs.pc); + tmp = pt_cause(regs); err |= __put_user(tmp, &sc->sc_regs.cause); + tmp = pt_badva(regs); err |= __put_user(tmp, &sc->sc_regs.badva); + + return err; +} + +static int restore_sigcontext(struct pt_regs *regs, + struct sigcontext __user *sc) +{ + unsigned long tmp; + int err = 0; + + err |= copy_from_user(®s->r00, &sc->sc_regs.r0, + 32 * sizeof(unsigned long)); + + err |= __get_user(regs->sa0, &sc->sc_regs.sa0); + err |= __get_user(regs->lc0, &sc->sc_regs.lc0); + err |= __get_user(regs->sa1, &sc->sc_regs.sa1); + err |= __get_user(regs->lc1, &sc->sc_regs.lc1); + err |= __get_user(regs->m0, &sc->sc_regs.m0); + err |= __get_user(regs->m1, &sc->sc_regs.m1); + err |= __get_user(regs->usr, &sc->sc_regs.usr); + err |= __get_user(regs->preds, &sc->sc_regs.p3_0); + err |= __get_user(regs->gp, &sc->sc_regs.gp); + err |= __get_user(regs->ugp, &sc->sc_regs.ugp); +#if CONFIG_HEXAGON_ARCH_VERSION >= 4 + err |= __get_user(regs->cs0, &sc->sc_regs.cs0); + err |= __get_user(regs->cs1, &sc->sc_regs.cs1); +#endif + err |= __get_user(tmp, &sc->sc_regs.pc); pt_set_elr(regs, tmp); + + return err; +} + +/* + * Setup signal stack frame with siginfo structure + */ +static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, + struct pt_regs *regs) +{ + int err = 0; + struct rt_sigframe __user *frame; + struct hexagon_vdso *vdso = current->mm->context.vdso; + + frame = get_sigframe(ksig, regs, sizeof(struct rt_sigframe)); + + if (!access_ok(frame, sizeof(struct rt_sigframe))) + return -EFAULT; + + if (copy_siginfo_to_user(&frame->info, &ksig->info)) + return -EFAULT; + + /* The on-stack signal trampoline is no longer executed; + * however, the libgcc signal frame unwinding code checks for + * the presence of these two numeric magic values. + */ + err |= __put_user(0x7800d166, &frame->tramp[0]); + err |= __put_user(0x5400c004, &frame->tramp[1]); + err |= setup_sigcontext(regs, &frame->uc.uc_mcontext); + err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); + err |= __save_altstack(&frame->uc.uc_stack, user_stack_pointer(regs)); + if (err) + return -EFAULT; + + /* Load r0/r1 pair with signumber/siginfo pointer... */ + regs->r0100 = ((unsigned long long)((unsigned long)&frame->info) << 32) + | (unsigned long long)ksig->sig; + regs->r02 = (unsigned long) &frame->uc; + regs->r31 = (unsigned long) vdso->rt_signal_trampoline; + pt_psp(regs) = (unsigned long) frame; + pt_set_elr(regs, (unsigned long)ksig->ka.sa.sa_handler); + + return 0; +} + +/* + * Setup invocation of signal handler + */ +static void handle_signal(struct ksignal *ksig, struct pt_regs *regs) +{ + int ret; + + /* + * If we're handling a signal that aborted a system call, + * set up the error return value before adding the signal + * frame to the stack. + */ + + if (regs->syscall_nr >= 0) { + switch (regs->r00) { + case -ERESTART_RESTARTBLOCK: + case -ERESTARTNOHAND: + regs->r00 = -EINTR; + break; + case -ERESTARTSYS: + if (!(ksig->ka.sa.sa_flags & SA_RESTART)) { + regs->r00 = -EINTR; + break; + } + fallthrough; + case -ERESTARTNOINTR: + regs->r06 = regs->syscall_nr; + pt_set_elr(regs, pt_elr(regs) - 4); + regs->r00 = regs->restart_r0; + break; + default: + break; + } + } + + /* + * Set up the stack frame; not doing the SA_SIGINFO thing. We + * only set up the rt_frame flavor. + */ + /* If there was an error on setup, no signal was delivered. */ + ret = setup_rt_frame(ksig, sigmask_to_save(), regs); + + signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP)); +} + +/* + * Called from return-from-event code. + */ +void do_signal(struct pt_regs *regs) +{ + struct ksignal ksig; + + if (!user_mode(regs)) + return; + + if (get_signal(&ksig)) { + handle_signal(&ksig, regs); + return; + } + + /* + * No (more) signals; if we came from a system call, handle the restart. + */ + + if (regs->syscall_nr >= 0) { + switch (regs->r00) { + case -ERESTARTNOHAND: + case -ERESTARTSYS: + case -ERESTARTNOINTR: + regs->r06 = regs->syscall_nr; + break; + case -ERESTART_RESTARTBLOCK: + regs->r06 = __NR_restart_syscall; + break; + default: + goto no_restart; + } + pt_set_elr(regs, pt_elr(regs) - 4); + regs->r00 = regs->restart_r0; + } + +no_restart: + /* If there's no signal to deliver, put the saved sigmask back */ + restore_saved_sigmask(); +} + +/* + * Architecture-specific wrappers for signal-related system calls + */ + +asmlinkage int sys_rt_sigreturn(void) +{ + struct pt_regs *regs = current_pt_regs(); + struct rt_sigframe __user *frame; + sigset_t blocked; + + /* Always make any pending restarted system calls return -EINTR */ + current->restart_block.fn = do_no_restart_syscall; + + frame = (struct rt_sigframe __user *)pt_psp(regs); + if (!access_ok(frame, sizeof(*frame))) + goto badframe; + if (__copy_from_user(&blocked, &frame->uc.uc_sigmask, sizeof(blocked))) + goto badframe; + + set_current_blocked(&blocked); + + if (restore_sigcontext(regs, &frame->uc.uc_mcontext)) + goto badframe; + + /* Restore the user's stack as well */ + pt_psp(regs) = regs->r29; + + regs->syscall_nr = -1; + + if (restore_altstack(&frame->uc.uc_stack)) + goto badframe; + + return regs->r00; + +badframe: + force_sig(SIGSEGV); + return 0; +} -- cgit v1.2.3