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/paca.c | 321 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 321 insertions(+) create mode 100644 arch/powerpc/kernel/paca.c (limited to 'arch/powerpc/kernel/paca.c') diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c new file mode 100644 index 000000000..be8db402e --- /dev/null +++ b/arch/powerpc/kernel/paca.c @@ -0,0 +1,321 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * c 2001 PPC 64 Team, IBM Corp + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include "setup.h" + +#ifndef CONFIG_SMP +#define boot_cpuid 0 +#endif + +static void *__init alloc_paca_data(unsigned long size, unsigned long align, + unsigned long limit, int cpu) +{ + void *ptr; + int nid; + + /* + * boot_cpuid paca is allocated very early before cpu_to_node is up. + * Set bottom-up mode, because the boot CPU should be on node-0, + * which will put its paca in the right place. + */ + if (cpu == boot_cpuid) { + nid = NUMA_NO_NODE; + memblock_set_bottom_up(true); + } else { + nid = early_cpu_to_node(cpu); + } + + ptr = memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT, + limit, nid); + if (!ptr) + panic("cannot allocate paca data"); + + if (cpu == boot_cpuid) + memblock_set_bottom_up(false); + + return ptr; +} + +#ifdef CONFIG_PPC_PSERIES + +#define LPPACA_SIZE 0x400 + +static void *__init alloc_shared_lppaca(unsigned long size, unsigned long limit, + int cpu) +{ + size_t shared_lppaca_total_size = PAGE_ALIGN(nr_cpu_ids * LPPACA_SIZE); + static unsigned long shared_lppaca_size; + static void *shared_lppaca; + void *ptr; + + if (!shared_lppaca) { + memblock_set_bottom_up(true); + + /* + * See Documentation/powerpc/ultravisor.rst for more details. + * + * UV/HV data sharing is in PAGE_SIZE granularity. In order to + * minimize the number of pages shared, align the allocation to + * PAGE_SIZE. + */ + shared_lppaca = + memblock_alloc_try_nid(shared_lppaca_total_size, + PAGE_SIZE, MEMBLOCK_LOW_LIMIT, + limit, NUMA_NO_NODE); + if (!shared_lppaca) + panic("cannot allocate shared data"); + + memblock_set_bottom_up(false); + uv_share_page(PHYS_PFN(__pa(shared_lppaca)), + shared_lppaca_total_size >> PAGE_SHIFT); + } + + ptr = shared_lppaca + shared_lppaca_size; + shared_lppaca_size += size; + + /* + * This is very early in boot, so no harm done if the kernel crashes at + * this point. + */ + BUG_ON(shared_lppaca_size > shared_lppaca_total_size); + + return ptr; +} + +/* + * See asm/lppaca.h for more detail. + * + * lppaca structures must must be 1kB in size, L1 cache line aligned, + * and not cross 4kB boundary. A 1kB size and 1kB alignment will satisfy + * these requirements. + */ +static inline void init_lppaca(struct lppaca *lppaca) +{ + BUILD_BUG_ON(sizeof(struct lppaca) != 640); + + *lppaca = (struct lppaca) { + .desc = cpu_to_be32(0xd397d781), /* "LpPa" */ + .size = cpu_to_be16(LPPACA_SIZE), + .fpregs_in_use = 1, + .slb_count = cpu_to_be16(64), + .vmxregs_in_use = 0, + .page_ins = 0, }; +}; + +static struct lppaca * __init new_lppaca(int cpu, unsigned long limit) +{ + struct lppaca *lp; + + BUILD_BUG_ON(sizeof(struct lppaca) > LPPACA_SIZE); + + if (early_cpu_has_feature(CPU_FTR_HVMODE)) + return NULL; + + if (is_secure_guest()) + lp = alloc_shared_lppaca(LPPACA_SIZE, limit, cpu); + else + lp = alloc_paca_data(LPPACA_SIZE, 0x400, limit, cpu); + + init_lppaca(lp); + + return lp; +} +#endif /* CONFIG_PPC_PSERIES */ + +#ifdef CONFIG_PPC_64S_HASH_MMU +/* + * 3 persistent SLBs are allocated here. The buffer will be zero + * initially, hence will all be invaild until we actually write them. + * + * If you make the number of persistent SLB entries dynamic, please also + * update PR KVM to flush and restore them accordingly. + */ +static struct slb_shadow * __init new_slb_shadow(int cpu, unsigned long limit) +{ + struct slb_shadow *s; + + if (cpu != boot_cpuid) { + /* + * Boot CPU comes here before early_radix_enabled + * is parsed (e.g., for disable_radix). So allocate + * always and this will be fixed up in free_unused_pacas. + */ + if (early_radix_enabled()) + return NULL; + } + + s = alloc_paca_data(sizeof(*s), L1_CACHE_BYTES, limit, cpu); + + s->persistent = cpu_to_be32(SLB_NUM_BOLTED); + s->buffer_length = cpu_to_be32(sizeof(*s)); + + return s; +} +#endif /* CONFIG_PPC_64S_HASH_MMU */ + +/* The Paca is an array with one entry per processor. Each contains an + * lppaca, which contains the information shared between the + * hypervisor and Linux. + * On systems with hardware multi-threading, there are two threads + * per processor. The Paca array must contain an entry for each thread. + * The VPD Areas will give a max logical processors = 2 * max physical + * processors. The processor VPD array needs one entry per physical + * processor (not thread). + */ +struct paca_struct **paca_ptrs __read_mostly; +EXPORT_SYMBOL(paca_ptrs); + +void __init initialise_paca(struct paca_struct *new_paca, int cpu) +{ +#ifdef CONFIG_PPC_PSERIES + new_paca->lppaca_ptr = NULL; +#endif +#ifdef CONFIG_PPC_BOOK3E_64 + new_paca->kernel_pgd = swapper_pg_dir; +#endif + new_paca->lock_token = 0x8000; + new_paca->paca_index = cpu; + new_paca->kernel_toc = kernel_toc_addr(); + new_paca->kernelbase = (unsigned long) _stext; + /* Only set MSR:IR/DR when MMU is initialized */ + new_paca->kernel_msr = MSR_KERNEL & ~(MSR_IR | MSR_DR); + new_paca->hw_cpu_id = 0xffff; + new_paca->kexec_state = KEXEC_STATE_NONE; + new_paca->__current = &init_task; + new_paca->data_offset = 0xfeeeeeeeeeeeeeeeULL; +#ifdef CONFIG_PPC_64S_HASH_MMU + new_paca->slb_shadow_ptr = NULL; +#endif + +#ifdef CONFIG_PPC_BOOK3E_64 + /* For now -- if we have threads this will be adjusted later */ + new_paca->tcd_ptr = &new_paca->tcd; +#endif +} + +/* Put the paca pointer into r13 and SPRG_PACA */ +void setup_paca(struct paca_struct *new_paca) +{ + /* Setup r13 */ + local_paca = new_paca; + +#ifdef CONFIG_PPC_BOOK3E_64 + /* On Book3E, initialize the TLB miss exception frames */ + mtspr(SPRN_SPRG_TLB_EXFRAME, local_paca->extlb); +#else + /* + * In HV mode, we setup both HPACA and PACA to avoid problems + * if we do a GET_PACA() before the feature fixups have been + * applied. + * + * Normally you should test against CPU_FTR_HVMODE, but CPU features + * are not yet set up when we first reach here. + */ + if (mfmsr() & MSR_HV) + mtspr(SPRN_SPRG_HPACA, local_paca); +#endif + mtspr(SPRN_SPRG_PACA, local_paca); + +} + +static int __initdata paca_nr_cpu_ids; +static int __initdata paca_ptrs_size; +static int __initdata paca_struct_size; + +void __init allocate_paca_ptrs(void) +{ + paca_nr_cpu_ids = nr_cpu_ids; + + paca_ptrs_size = sizeof(struct paca_struct *) * nr_cpu_ids; + paca_ptrs = memblock_alloc_raw(paca_ptrs_size, SMP_CACHE_BYTES); + if (!paca_ptrs) + panic("Failed to allocate %d bytes for paca pointers\n", + paca_ptrs_size); + + memset(paca_ptrs, 0x88, paca_ptrs_size); +} + +void __init allocate_paca(int cpu) +{ + u64 limit; + struct paca_struct *paca; + + BUG_ON(cpu >= paca_nr_cpu_ids); + +#ifdef CONFIG_PPC_BOOK3S_64 + /* + * We access pacas in real mode, and cannot take SLB faults + * on them when in virtual mode, so allocate them accordingly. + */ + limit = min(ppc64_bolted_size(), ppc64_rma_size); +#else + limit = ppc64_rma_size; +#endif + + paca = alloc_paca_data(sizeof(struct paca_struct), L1_CACHE_BYTES, + limit, cpu); + paca_ptrs[cpu] = paca; + + initialise_paca(paca, cpu); +#ifdef CONFIG_PPC_PSERIES + paca->lppaca_ptr = new_lppaca(cpu, limit); +#endif +#ifdef CONFIG_PPC_64S_HASH_MMU + paca->slb_shadow_ptr = new_slb_shadow(cpu, limit); +#endif + paca_struct_size += sizeof(struct paca_struct); +} + +void __init free_unused_pacas(void) +{ + int new_ptrs_size; + + new_ptrs_size = sizeof(struct paca_struct *) * nr_cpu_ids; + if (new_ptrs_size < paca_ptrs_size) + memblock_phys_free(__pa(paca_ptrs) + new_ptrs_size, + paca_ptrs_size - new_ptrs_size); + + paca_nr_cpu_ids = nr_cpu_ids; + paca_ptrs_size = new_ptrs_size; + +#ifdef CONFIG_PPC_64S_HASH_MMU + if (early_radix_enabled()) { + /* Ugly fixup, see new_slb_shadow() */ + memblock_phys_free(__pa(paca_ptrs[boot_cpuid]->slb_shadow_ptr), + sizeof(struct slb_shadow)); + paca_ptrs[boot_cpuid]->slb_shadow_ptr = NULL; + } +#endif + + printk(KERN_DEBUG "Allocated %u bytes for %u pacas\n", + paca_ptrs_size + paca_struct_size, nr_cpu_ids); +} + +#ifdef CONFIG_PPC_64S_HASH_MMU +void copy_mm_to_paca(struct mm_struct *mm) +{ + mm_context_t *context = &mm->context; + + VM_BUG_ON(!mm_ctx_slb_addr_limit(context)); + memcpy(&get_paca()->mm_ctx_low_slices_psize, mm_ctx_low_slices(context), + LOW_SLICE_ARRAY_SZ); + memcpy(&get_paca()->mm_ctx_high_slices_psize, mm_ctx_high_slices(context), + TASK_SLICE_ARRAY_SZ(context)); +} +#endif /* CONFIG_PPC_64S_HASH_MMU */ -- cgit v1.2.3