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(). ... --- tools/testing/selftests/powerpc/mm/subpage_prot.c | 236 ++++++++++++++++++++++ 1 file changed, 236 insertions(+) create mode 100644 tools/testing/selftests/powerpc/mm/subpage_prot.c (limited to 'tools/testing/selftests/powerpc/mm/subpage_prot.c') diff --git a/tools/testing/selftests/powerpc/mm/subpage_prot.c b/tools/testing/selftests/powerpc/mm/subpage_prot.c new file mode 100644 index 000000000..3ae77ba93 --- /dev/null +++ b/tools/testing/selftests/powerpc/mm/subpage_prot.c @@ -0,0 +1,236 @@ +/* + * Copyright IBM Corp. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2.1 of the GNU Lesser General Public License + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "utils.h" + +char *file_name; + +int in_test; +volatile int faulted; +volatile void *dar; +int errors; + +static void segv(int signum, siginfo_t *info, void *ctxt_v) +{ + ucontext_t *ctxt = (ucontext_t *)ctxt_v; + struct pt_regs *regs = ctxt->uc_mcontext.regs; + + if (!in_test) { + fprintf(stderr, "Segfault outside of test !\n"); + exit(1); + } + + faulted = 1; + dar = (void *)regs->dar; + regs->nip += 4; +} + +static inline void do_read(const volatile void *addr) +{ + int ret; + + asm volatile("lwz %0,0(%1); twi 0,%0,0; isync;\n" + : "=r" (ret) : "r" (addr) : "memory"); +} + +static inline void do_write(const volatile void *addr) +{ + int val = 0x1234567; + + asm volatile("stw %0,0(%1); sync; \n" + : : "r" (val), "r" (addr) : "memory"); +} + +static inline void check_faulted(void *addr, long page, long subpage, int write) +{ + int want_fault = (subpage == ((page + 3) % 16)); + + if (write) + want_fault |= (subpage == ((page + 1) % 16)); + + if (faulted != want_fault) { + printf("Failed at %p (p=%ld,sp=%ld,w=%d), want=%s, got=%s !\n", + addr, page, subpage, write, + want_fault ? "fault" : "pass", + faulted ? "fault" : "pass"); + ++errors; + } + + if (faulted) { + if (dar != addr) { + printf("Fault expected at %p and happened at %p !\n", + addr, dar); + } + faulted = 0; + asm volatile("sync" : : : "memory"); + } +} + +static int run_test(void *addr, unsigned long size) +{ + unsigned int *map; + long i, j, pages, err; + + pages = size / 0x10000; + map = malloc(pages * 4); + assert(map); + + /* + * for each page, mark subpage i % 16 read only and subpage + * (i + 3) % 16 inaccessible + */ + for (i = 0; i < pages; i++) { + map[i] = (0x40000000 >> (((i + 1) * 2) % 32)) | + (0xc0000000 >> (((i + 3) * 2) % 32)); + } + + err = syscall(__NR_subpage_prot, addr, size, map); + if (err) { + perror("subpage_perm"); + return 1; + } + free(map); + + in_test = 1; + errors = 0; + for (i = 0; i < pages; i++) { + for (j = 0; j < 16; j++, addr += 0x1000) { + do_read(addr); + check_faulted(addr, i, j, 0); + do_write(addr); + check_faulted(addr, i, j, 1); + } + } + + in_test = 0; + if (errors) { + printf("%d errors detected\n", errors); + return 1; + } + + return 0; +} + +static int syscall_available(void) +{ + int rc; + + errno = 0; + rc = syscall(__NR_subpage_prot, 0, 0, 0); + + return rc == 0 || (errno != ENOENT && errno != ENOSYS); +} + +int test_anon(void) +{ + unsigned long align; + struct sigaction act = { + .sa_sigaction = segv, + .sa_flags = SA_SIGINFO + }; + void *mallocblock; + unsigned long mallocsize; + + SKIP_IF(!syscall_available()); + + if (getpagesize() != 0x10000) { + fprintf(stderr, "Kernel page size must be 64K!\n"); + return 1; + } + + sigaction(SIGSEGV, &act, NULL); + + mallocsize = 4 * 16 * 1024 * 1024; + + FAIL_IF(posix_memalign(&mallocblock, 64 * 1024, mallocsize)); + + align = (unsigned long)mallocblock; + if (align & 0xffff) + align = (align | 0xffff) + 1; + + mallocblock = (void *)align; + + printf("allocated malloc block of 0x%lx bytes at %p\n", + mallocsize, mallocblock); + + printf("testing malloc block...\n"); + + return run_test(mallocblock, mallocsize); +} + +int test_file(void) +{ + struct sigaction act = { + .sa_sigaction = segv, + .sa_flags = SA_SIGINFO + }; + void *fileblock; + off_t filesize; + int fd; + + SKIP_IF(!syscall_available()); + + fd = open(file_name, O_RDWR); + if (fd == -1) { + perror("failed to open file"); + return 1; + } + sigaction(SIGSEGV, &act, NULL); + + filesize = lseek(fd, 0, SEEK_END); + if (filesize & 0xffff) + filesize &= ~0xfffful; + + fileblock = mmap(NULL, filesize, PROT_READ | PROT_WRITE, + MAP_SHARED, fd, 0); + if (fileblock == MAP_FAILED) { + perror("failed to map file"); + return 1; + } + printf("allocated %s for 0x%lx bytes at %p\n", + file_name, filesize, fileblock); + + printf("testing file map...\n"); + + return run_test(fileblock, filesize); +} + +int main(int argc, char *argv[]) +{ + int rc; + + rc = test_harness(test_anon, "subpage_prot_anon"); + if (rc) + return rc; + + if (argc > 1) + file_name = argv[1]; + else + file_name = "tempfile"; + + return test_harness(test_file, "subpage_prot_file"); +} -- cgit v1.2.3