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/sparc/kernel/kgdb_64.c | 201 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 arch/sparc/kernel/kgdb_64.c (limited to 'arch/sparc/kernel/kgdb_64.c') diff --git a/arch/sparc/kernel/kgdb_64.c b/arch/sparc/kernel/kgdb_64.c new file mode 100644 index 000000000..177746ae2 --- /dev/null +++ b/arch/sparc/kernel/kgdb_64.c @@ -0,0 +1,201 @@ +// SPDX-License-Identifier: GPL-2.0 +/* kgdb.c: KGDB support for 64-bit sparc. + * + * Copyright (C) 2008 David S. Miller + */ + +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "kernel.h" + +void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs) +{ + struct reg_window *win; + int i; + + gdb_regs[GDB_G0] = 0; + for (i = 0; i < 15; i++) + gdb_regs[GDB_G1 + i] = regs->u_regs[UREG_G1 + i]; + + win = (struct reg_window *) (regs->u_regs[UREG_FP] + STACK_BIAS); + for (i = 0; i < 8; i++) + gdb_regs[GDB_L0 + i] = win->locals[i]; + for (i = 0; i < 8; i++) + gdb_regs[GDB_I0 + i] = win->ins[i]; + + for (i = GDB_F0; i <= GDB_F62; i++) + gdb_regs[i] = 0; + + gdb_regs[GDB_PC] = regs->tpc; + gdb_regs[GDB_NPC] = regs->tnpc; + gdb_regs[GDB_STATE] = regs->tstate; + gdb_regs[GDB_FSR] = 0; + gdb_regs[GDB_FPRS] = 0; + gdb_regs[GDB_Y] = regs->y; +} + +void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p) +{ + struct thread_info *t = task_thread_info(p); + extern unsigned int switch_to_pc; + extern unsigned int ret_from_fork; + struct reg_window *win; + unsigned long pc, cwp; + int i; + + for (i = GDB_G0; i < GDB_G6; i++) + gdb_regs[i] = 0; + gdb_regs[GDB_G6] = (unsigned long) t; + gdb_regs[GDB_G7] = (unsigned long) p; + for (i = GDB_O0; i < GDB_SP; i++) + gdb_regs[i] = 0; + gdb_regs[GDB_SP] = t->ksp; + gdb_regs[GDB_O7] = 0; + + win = (struct reg_window *) (t->ksp + STACK_BIAS); + for (i = 0; i < 8; i++) + gdb_regs[GDB_L0 + i] = win->locals[i]; + for (i = 0; i < 8; i++) + gdb_regs[GDB_I0 + i] = win->ins[i]; + + for (i = GDB_F0; i <= GDB_F62; i++) + gdb_regs[i] = 0; + + if (t->new_child) + pc = (unsigned long) &ret_from_fork; + else + pc = (unsigned long) &switch_to_pc; + + gdb_regs[GDB_PC] = pc; + gdb_regs[GDB_NPC] = pc + 4; + + cwp = __thread_flag_byte_ptr(t)[TI_FLAG_BYTE_CWP]; + + gdb_regs[GDB_STATE] = (TSTATE_PRIV | TSTATE_IE | cwp); + gdb_regs[GDB_FSR] = 0; + gdb_regs[GDB_FPRS] = 0; + gdb_regs[GDB_Y] = 0; +} + +void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs) +{ + struct reg_window *win; + int i; + + for (i = 0; i < 15; i++) + regs->u_regs[UREG_G1 + i] = gdb_regs[GDB_G1 + i]; + + /* If the TSTATE register is changing, we have to preserve + * the CWP field, otherwise window save/restore explodes. + */ + if (regs->tstate != gdb_regs[GDB_STATE]) { + unsigned long cwp = regs->tstate & TSTATE_CWP; + + regs->tstate = (gdb_regs[GDB_STATE] & ~TSTATE_CWP) | cwp; + } + + regs->tpc = gdb_regs[GDB_PC]; + regs->tnpc = gdb_regs[GDB_NPC]; + regs->y = gdb_regs[GDB_Y]; + + win = (struct reg_window *) (regs->u_regs[UREG_FP] + STACK_BIAS); + for (i = 0; i < 8; i++) + win->locals[i] = gdb_regs[GDB_L0 + i]; + for (i = 0; i < 8; i++) + win->ins[i] = gdb_regs[GDB_I0 + i]; +} + +#ifdef CONFIG_SMP +void __irq_entry smp_kgdb_capture_client(int irq, struct pt_regs *regs) +{ + unsigned long flags; + + __asm__ __volatile__("rdpr %%pstate, %0\n\t" + "wrpr %0, %1, %%pstate" + : "=r" (flags) + : "i" (PSTATE_IE)); + + flushw_all(); + + if (atomic_read(&kgdb_active) != -1) + kgdb_nmicallback(raw_smp_processor_id(), regs); + + __asm__ __volatile__("wrpr %0, 0, %%pstate" + : : "r" (flags)); +} +#endif + +int kgdb_arch_handle_exception(int e_vector, int signo, int err_code, + char *remcomInBuffer, char *remcomOutBuffer, + struct pt_regs *linux_regs) +{ + unsigned long addr; + char *ptr; + + switch (remcomInBuffer[0]) { + case 'c': + /* try to read optional parameter, pc unchanged if no parm */ + ptr = &remcomInBuffer[1]; + if (kgdb_hex2long(&ptr, &addr)) { + linux_regs->tpc = addr; + linux_regs->tnpc = addr + 4; + } + fallthrough; + + case 'D': + case 'k': + if (linux_regs->tpc == (unsigned long) arch_kgdb_breakpoint) { + linux_regs->tpc = linux_regs->tnpc; + linux_regs->tnpc += 4; + } + return 0; + } + return -1; +} + +asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs) +{ + enum ctx_state prev_state = exception_enter(); + unsigned long flags; + + if (user_mode(regs)) { + bad_trap(regs, trap_level); + goto out; + } + + flushw_all(); + + local_irq_save(flags); + kgdb_handle_exception(0x172, SIGTRAP, 0, regs); + local_irq_restore(flags); +out: + exception_exit(prev_state); +} + +int kgdb_arch_init(void) +{ + return 0; +} + +void kgdb_arch_exit(void) +{ +} + +void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip) +{ + regs->tpc = ip; + regs->tnpc = regs->tpc + 4; +} + +const struct kgdb_arch arch_kgdb_ops = { + /* Breakpoint instruction: ta 0x72 */ + .gdb_bpt_instr = { 0x91, 0xd0, 0x20, 0x72 }, +}; -- cgit v1.2.3