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/powerpc/kernel/reloc_32.S | 205 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 205 insertions(+) create mode 100644 arch/powerpc/kernel/reloc_32.S (limited to 'arch/powerpc/kernel/reloc_32.S') diff --git a/arch/powerpc/kernel/reloc_32.S b/arch/powerpc/kernel/reloc_32.S new file mode 100644 index 000000000..0508c14b4 --- /dev/null +++ b/arch/powerpc/kernel/reloc_32.S @@ -0,0 +1,205 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Code to process dynamic relocations for PPC32. + * + * Copyrights (C) IBM Corporation, 2011. + * Author: Suzuki Poulose + * + * - Based on ppc64 code - reloc_64.S + */ + +#include + +/* Dynamic section table entry tags */ +DT_RELA = 7 /* Tag for Elf32_Rela section */ +DT_RELASZ = 8 /* Size of the Rela relocs */ +DT_RELAENT = 9 /* Size of one Rela reloc entry */ + +STN_UNDEF = 0 /* Undefined symbol index */ +STB_LOCAL = 0 /* Local binding for the symbol */ + +R_PPC_ADDR16_LO = 4 /* Lower half of (S+A) */ +R_PPC_ADDR16_HI = 5 /* Upper half of (S+A) */ +R_PPC_ADDR16_HA = 6 /* High Adjusted (S+A) */ +R_PPC_RELATIVE = 22 + +/* + * r3 = desired final address + */ + +_GLOBAL(relocate) + + mflr r0 /* Save our LR */ + bcl 20,31,$+4 /* Find our current runtime address */ +0: mflr r12 /* Make it accessible */ + mtlr r0 + + lwz r11, (p_dyn - 0b)(r12) + add r11, r11, r12 /* runtime address of .dynamic section */ + lwz r9, (p_rela - 0b)(r12) + add r9, r9, r12 /* runtime address of .rela.dyn section */ + lwz r10, (p_st - 0b)(r12) + add r10, r10, r12 /* runtime address of _stext section */ + lwz r13, (p_sym - 0b)(r12) + add r13, r13, r12 /* runtime address of .dynsym section */ + + /* + * Scan the dynamic section for RELA, RELASZ entries + */ + li r6, 0 + li r7, 0 + li r8, 0 +1: lwz r5, 0(r11) /* ELF_Dyn.d_tag */ + cmpwi r5, 0 /* End of ELF_Dyn[] */ + beq eodyn + cmpwi r5, DT_RELA + bne relasz + lwz r7, 4(r11) /* r7 = rela.link */ + b skip +relasz: + cmpwi r5, DT_RELASZ + bne relaent + lwz r8, 4(r11) /* r8 = Total Rela relocs size */ + b skip +relaent: + cmpwi r5, DT_RELAENT + bne skip + lwz r6, 4(r11) /* r6 = Size of one Rela reloc */ +skip: + addi r11, r11, 8 + b 1b +eodyn: /* End of Dyn Table scan */ + + /* Check if we have found all the entries */ + cmpwi r7, 0 + beq done + cmpwi r8, 0 + beq done + cmpwi r6, 0 + beq done + + + /* + * Work out the current offset from the link time address of .rela + * section. + * cur_offset[r7] = rela.run[r9] - rela.link [r7] + * _stext.link[r12] = _stext.run[r10] - cur_offset[r7] + * final_offset[r3] = _stext.final[r3] - _stext.link[r12] + */ + subf r7, r7, r9 /* cur_offset */ + subf r12, r7, r10 + subf r3, r12, r3 /* final_offset */ + + subf r8, r6, r8 /* relaz -= relaent */ + /* + * Scan through the .rela table and process each entry + * r9 - points to the current .rela table entry + * r13 - points to the symbol table + */ + + /* + * Check if we have a relocation based on symbol + * r5 will hold the value of the symbol. + */ +applyrela: + lwz r4, 4(r9) /* r4 = rela.r_info */ + srwi r5, r4, 8 /* ELF32_R_SYM(r_info) */ + cmpwi r5, STN_UNDEF /* sym == STN_UNDEF ? */ + beq get_type /* value = 0 */ + /* Find the value of the symbol at index(r5) */ + slwi r5, r5, 4 /* r5 = r5 * sizeof(Elf32_Sym) */ + add r12, r13, r5 /* r12 = &__dyn_sym[Index] */ + + /* + * GNU ld has a bug, where dynamic relocs based on + * STB_LOCAL symbols, the value should be assumed + * to be zero. - Alan Modra + */ + /* XXX: Do we need to check if we are using GNU ld ? */ + lbz r5, 12(r12) /* r5 = dyn_sym[Index].st_info */ + extrwi r5, r5, 4, 24 /* r5 = ELF32_ST_BIND(r5) */ + cmpwi r5, STB_LOCAL /* st_value = 0, ld bug */ + beq get_type /* We have r5 = 0 */ + lwz r5, 4(r12) /* r5 = __dyn_sym[Index].st_value */ + +get_type: + /* Load the relocation type to r4 */ + extrwi r4, r4, 8, 24 /* r4 = ELF32_R_TYPE(r_info) = ((char*)r4)[3] */ + + /* R_PPC_RELATIVE */ + cmpwi r4, R_PPC_RELATIVE + bne hi16 + lwz r4, 0(r9) /* r_offset */ + lwz r0, 8(r9) /* r_addend */ + add r0, r0, r3 /* final addend */ + stwx r0, r4, r7 /* memory[r4+r7]) = (u32)r0 */ + b nxtrela /* continue */ + + /* R_PPC_ADDR16_HI */ +hi16: + cmpwi r4, R_PPC_ADDR16_HI + bne ha16 + lwz r4, 0(r9) /* r_offset */ + lwz r0, 8(r9) /* r_addend */ + add r0, r0, r3 + add r0, r0, r5 /* r0 = (S+A+Offset) */ + extrwi r0, r0, 16, 0 /* r0 = (r0 >> 16) */ + b store_half + + /* R_PPC_ADDR16_HA */ +ha16: + cmpwi r4, R_PPC_ADDR16_HA + bne lo16 + lwz r4, 0(r9) /* r_offset */ + lwz r0, 8(r9) /* r_addend */ + add r0, r0, r3 + add r0, r0, r5 /* r0 = (S+A+Offset) */ + extrwi r5, r0, 1, 16 /* Extract bit 16 */ + extrwi r0, r0, 16, 0 /* r0 = (r0 >> 16) */ + add r0, r0, r5 /* Add it to r0 */ + b store_half + + /* R_PPC_ADDR16_LO */ +lo16: + cmpwi r4, R_PPC_ADDR16_LO + bne unknown_type + lwz r4, 0(r9) /* r_offset */ + lwz r0, 8(r9) /* r_addend */ + add r0, r0, r3 + add r0, r0, r5 /* r0 = (S+A+Offset) */ + extrwi r0, r0, 16, 16 /* r0 &= 0xffff */ + /* Fall through to */ + + /* Store half word */ +store_half: + sthx r0, r4, r7 /* memory[r4+r7] = (u16)r0 */ + +nxtrela: + /* + * We have to flush the modified instructions to the + * main storage from the d-cache. And also, invalidate the + * cached instructions in i-cache which has been modified. + * + * We delay the sync / isync operation till the end, since + * we won't be executing the modified instructions until + * we return from here. + */ + dcbst r4,r7 + sync /* Ensure the data is flushed before icbi */ + icbi r4,r7 +unknown_type: + cmpwi r8, 0 /* relasz = 0 ? */ + ble done + add r9, r9, r6 /* move to next entry in the .rela table */ + subf r8, r6, r8 /* relasz -= relaent */ + b applyrela + +done: + sync /* Wait for the flush to finish */ + isync /* Discard prefetched instructions */ + blr + +p_dyn: .long __dynamic_start - 0b +p_rela: .long __rela_dyn_start - 0b +p_sym: .long __dynamic_symtab - 0b +p_st: .long _stext - 0b -- cgit v1.2.3