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/dscr/.gitignore | 8 ++ tools/testing/selftests/powerpc/dscr/Makefile | 13 +++ tools/testing/selftests/powerpc/dscr/dscr.h | 115 +++++++++++++++++++ .../selftests/powerpc/dscr/dscr_default_test.c | 126 +++++++++++++++++++++ .../selftests/powerpc/dscr/dscr_explicit_test.c | 70 ++++++++++++ .../powerpc/dscr/dscr_inherit_exec_test.c | 108 ++++++++++++++++++ .../selftests/powerpc/dscr/dscr_inherit_test.c | 86 ++++++++++++++ .../selftests/powerpc/dscr/dscr_sysfs_test.c | 103 +++++++++++++++++ .../powerpc/dscr/dscr_sysfs_thread_test.c | 79 +++++++++++++ .../selftests/powerpc/dscr/dscr_user_test.c | 60 ++++++++++ tools/testing/selftests/powerpc/dscr/settings | 1 + 11 files changed, 769 insertions(+) create mode 100644 tools/testing/selftests/powerpc/dscr/.gitignore create mode 100644 tools/testing/selftests/powerpc/dscr/Makefile create mode 100644 tools/testing/selftests/powerpc/dscr/dscr.h create mode 100644 tools/testing/selftests/powerpc/dscr/dscr_default_test.c create mode 100644 tools/testing/selftests/powerpc/dscr/dscr_explicit_test.c create mode 100644 tools/testing/selftests/powerpc/dscr/dscr_inherit_exec_test.c create mode 100644 tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c create mode 100644 tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c create mode 100644 tools/testing/selftests/powerpc/dscr/dscr_sysfs_thread_test.c create mode 100644 tools/testing/selftests/powerpc/dscr/dscr_user_test.c create mode 100644 tools/testing/selftests/powerpc/dscr/settings (limited to 'tools/testing/selftests/powerpc/dscr') diff --git a/tools/testing/selftests/powerpc/dscr/.gitignore b/tools/testing/selftests/powerpc/dscr/.gitignore new file mode 100644 index 000000000..1d08b15af --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/.gitignore @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0-only +dscr_default_test +dscr_explicit_test +dscr_inherit_exec_test +dscr_inherit_test +dscr_sysfs_test +dscr_sysfs_thread_test +dscr_user_test diff --git a/tools/testing/selftests/powerpc/dscr/Makefile b/tools/testing/selftests/powerpc/dscr/Makefile new file mode 100644 index 000000000..845db6273 --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/Makefile @@ -0,0 +1,13 @@ +# SPDX-License-Identifier: GPL-2.0 +TEST_GEN_PROGS := dscr_default_test dscr_explicit_test dscr_user_test \ + dscr_inherit_test dscr_inherit_exec_test dscr_sysfs_test \ + dscr_sysfs_thread_test + +TEST_FILES := settings + +top_srcdir = ../../../../.. +include ../../lib.mk + +$(OUTPUT)/dscr_default_test: LDLIBS += -lpthread + +$(TEST_GEN_PROGS): ../harness.c ../utils.c diff --git a/tools/testing/selftests/powerpc/dscr/dscr.h b/tools/testing/selftests/powerpc/dscr/dscr.h new file mode 100644 index 000000000..b703714e7 --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/dscr.h @@ -0,0 +1,115 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * POWER Data Stream Control Register (DSCR) + * + * This header file contains helper functions and macros + * required for all the DSCR related test cases. + * + * Copyright 2012, Anton Blanchard, IBM Corporation. + * Copyright 2015, Anshuman Khandual, IBM Corporation. + */ +#ifndef _SELFTESTS_POWERPC_DSCR_DSCR_H +#define _SELFTESTS_POWERPC_DSCR_DSCR_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "reg.h" +#include "utils.h" + +#define THREADS 100 /* Max threads */ +#define COUNT 100 /* Max iterations */ +#define DSCR_MAX 16 /* Max DSCR value */ +#define LEN_MAX 100 /* Max name length */ + +#define DSCR_DEFAULT "/sys/devices/system/cpu/dscr_default" +#define CPU_PATH "/sys/devices/system/cpu/" + +#define rmb() asm volatile("lwsync":::"memory") +#define wmb() asm volatile("lwsync":::"memory") + +#define READ_ONCE(x) (*(volatile typeof(x) *)&(x)) + +/* Prilvilege state DSCR access */ +inline unsigned long get_dscr(void) +{ + return mfspr(SPRN_DSCR_PRIV); +} + +inline void set_dscr(unsigned long val) +{ + mtspr(SPRN_DSCR_PRIV, val); +} + +/* Problem state DSCR access */ +inline unsigned long get_dscr_usr(void) +{ + return mfspr(SPRN_DSCR); +} + +inline void set_dscr_usr(unsigned long val) +{ + mtspr(SPRN_DSCR, val); +} + +/* Default DSCR access */ +unsigned long get_default_dscr(void) +{ + int fd = -1, ret; + char buf[16]; + unsigned long val; + + if (fd == -1) { + fd = open(DSCR_DEFAULT, O_RDONLY); + if (fd == -1) { + perror("open() failed"); + exit(1); + } + } + memset(buf, 0, sizeof(buf)); + lseek(fd, 0, SEEK_SET); + ret = read(fd, buf, sizeof(buf)); + if (ret == -1) { + perror("read() failed"); + exit(1); + } + sscanf(buf, "%lx", &val); + close(fd); + return val; +} + +void set_default_dscr(unsigned long val) +{ + int fd = -1, ret; + char buf[16]; + + if (fd == -1) { + fd = open(DSCR_DEFAULT, O_RDWR); + if (fd == -1) { + perror("open() failed"); + exit(1); + } + } + sprintf(buf, "%lx\n", val); + ret = write(fd, buf, strlen(buf)); + if (ret == -1) { + perror("write() failed"); + exit(1); + } + close(fd); +} + +double uniform_deviate(int seed) +{ + return seed * (1.0 / (RAND_MAX + 1.0)); +} +#endif /* _SELFTESTS_POWERPC_DSCR_DSCR_H */ diff --git a/tools/testing/selftests/powerpc/dscr/dscr_default_test.c b/tools/testing/selftests/powerpc/dscr/dscr_default_test.c new file mode 100644 index 000000000..e76611e60 --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/dscr_default_test.c @@ -0,0 +1,126 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * POWER Data Stream Control Register (DSCR) default test + * + * This test modifies the system wide default DSCR through + * it's sysfs interface and then verifies that all threads + * see the correct changed DSCR value immediately. + * + * Copyright 2012, Anton Blanchard, IBM Corporation. + * Copyright 2015, Anshuman Khandual, IBM Corporation. + */ +#include "dscr.h" + +static unsigned long dscr; /* System DSCR default */ +static unsigned long sequence; +static unsigned long result[THREADS]; + +static void *do_test(void *in) +{ + unsigned long thread = (unsigned long)in; + unsigned long i; + + for (i = 0; i < COUNT; i++) { + unsigned long d, cur_dscr, cur_dscr_usr; + unsigned long s1, s2; + + s1 = READ_ONCE(sequence); + if (s1 & 1) + continue; + rmb(); + + d = dscr; + cur_dscr = get_dscr(); + cur_dscr_usr = get_dscr_usr(); + + rmb(); + s2 = sequence; + + if (s1 != s2) + continue; + + if (cur_dscr != d) { + fprintf(stderr, "thread %ld kernel DSCR should be %ld " + "but is %ld\n", thread, d, cur_dscr); + result[thread] = 1; + pthread_exit(&result[thread]); + } + + if (cur_dscr_usr != d) { + fprintf(stderr, "thread %ld user DSCR should be %ld " + "but is %ld\n", thread, d, cur_dscr_usr); + result[thread] = 1; + pthread_exit(&result[thread]); + } + } + result[thread] = 0; + pthread_exit(&result[thread]); +} + +int dscr_default(void) +{ + pthread_t threads[THREADS]; + unsigned long i, *status[THREADS]; + unsigned long orig_dscr_default; + + SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR)); + + orig_dscr_default = get_default_dscr(); + + /* Initial DSCR default */ + dscr = 1; + set_default_dscr(dscr); + + /* Spawn all testing threads */ + for (i = 0; i < THREADS; i++) { + if (pthread_create(&threads[i], NULL, do_test, (void *)i)) { + perror("pthread_create() failed"); + goto fail; + } + } + + srand(getpid()); + + /* Keep changing the DSCR default */ + for (i = 0; i < COUNT; i++) { + double ret = uniform_deviate(rand()); + + if (ret < 0.0001) { + sequence++; + wmb(); + + dscr++; + if (dscr > DSCR_MAX) + dscr = 0; + + set_default_dscr(dscr); + + wmb(); + sequence++; + } + } + + /* Individual testing thread exit status */ + for (i = 0; i < THREADS; i++) { + if (pthread_join(threads[i], (void **)&(status[i]))) { + perror("pthread_join() failed"); + goto fail; + } + + if (*status[i]) { + printf("%ldth thread failed to join with %ld status\n", + i, *status[i]); + goto fail; + } + } + set_default_dscr(orig_dscr_default); + return 0; +fail: + set_default_dscr(orig_dscr_default); + return 1; +} + +int main(int argc, char *argv[]) +{ + return test_harness(dscr_default, "dscr_default_test"); +} diff --git a/tools/testing/selftests/powerpc/dscr/dscr_explicit_test.c b/tools/testing/selftests/powerpc/dscr/dscr_explicit_test.c new file mode 100644 index 000000000..32fcf2b32 --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/dscr_explicit_test.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * POWER Data Stream Control Register (DSCR) explicit test + * + * This test modifies the DSCR value using mtspr instruction and + * verifies the change with mfspr instruction. It uses both the + * privilege state SPR and the problem state SPR for this purpose. + * + * When using the privilege state SPR, the instructions such as + * mfspr or mtspr are priviledged and the kernel emulates them + * for us. Instructions using problem state SPR can be exuecuted + * directly without any emulation if the HW supports them. Else + * they also get emulated by the kernel. + * + * Copyright 2012, Anton Blanchard, IBM Corporation. + * Copyright 2015, Anshuman Khandual, IBM Corporation. + */ +#include "dscr.h" + +int dscr_explicit(void) +{ + unsigned long i, dscr = 0; + + SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR)); + + srand(getpid()); + set_dscr(dscr); + + for (i = 0; i < COUNT; i++) { + unsigned long cur_dscr, cur_dscr_usr; + double ret = uniform_deviate(rand()); + + if (ret < 0.001) { + dscr++; + if (dscr > DSCR_MAX) + dscr = 0; + + set_dscr(dscr); + } + + cur_dscr = get_dscr(); + if (cur_dscr != dscr) { + fprintf(stderr, "Kernel DSCR should be %ld but " + "is %ld\n", dscr, cur_dscr); + return 1; + } + + ret = uniform_deviate(rand()); + if (ret < 0.001) { + dscr++; + if (dscr > DSCR_MAX) + dscr = 0; + + set_dscr_usr(dscr); + } + + cur_dscr_usr = get_dscr_usr(); + if (cur_dscr_usr != dscr) { + fprintf(stderr, "User DSCR should be %ld but " + "is %ld\n", dscr, cur_dscr_usr); + return 1; + } + } + return 0; +} + +int main(int argc, char *argv[]) +{ + return test_harness(dscr_explicit, "dscr_explicit_test"); +} diff --git a/tools/testing/selftests/powerpc/dscr/dscr_inherit_exec_test.c b/tools/testing/selftests/powerpc/dscr/dscr_inherit_exec_test.c new file mode 100644 index 000000000..c6a81b2d6 --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/dscr_inherit_exec_test.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * POWER Data Stream Control Register (DSCR) fork exec test + * + * This testcase modifies the DSCR using mtspr, forks & execs and + * verifies that the child is using the changed DSCR using mfspr. + * + * When using the privilege state SPR, the instructions such as + * mfspr or mtspr are privileged and the kernel emulates them + * for us. Instructions using problem state SPR can be executed + * directly without any emulation if the HW supports them. Else + * they also get emulated by the kernel. + * + * Copyright 2012, Anton Blanchard, IBM Corporation. + * Copyright 2015, Anshuman Khandual, IBM Corporation. + */ +#include "dscr.h" + +static char *prog; + +static void do_exec(unsigned long parent_dscr) +{ + unsigned long cur_dscr, cur_dscr_usr; + + cur_dscr = get_dscr(); + cur_dscr_usr = get_dscr_usr(); + + if (cur_dscr != parent_dscr) { + fprintf(stderr, "Parent DSCR %ld was not inherited " + "over exec (kernel value)\n", parent_dscr); + exit(1); + } + + if (cur_dscr_usr != parent_dscr) { + fprintf(stderr, "Parent DSCR %ld was not inherited " + "over exec (user value)\n", parent_dscr); + exit(1); + } + exit(0); +} + +int dscr_inherit_exec(void) +{ + unsigned long i, dscr = 0; + pid_t pid; + + SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR)); + + for (i = 0; i < COUNT; i++) { + dscr++; + if (dscr > DSCR_MAX) + dscr = 0; + + if (dscr == get_default_dscr()) + continue; + + if (i % 2 == 0) + set_dscr_usr(dscr); + else + set_dscr(dscr); + + pid = fork(); + if (pid == -1) { + perror("fork() failed"); + exit(1); + } else if (pid) { + int status; + + if (waitpid(pid, &status, 0) == -1) { + perror("waitpid() failed"); + exit(1); + } + + if (!WIFEXITED(status)) { + fprintf(stderr, "Child didn't exit cleanly\n"); + exit(1); + } + + if (WEXITSTATUS(status) != 0) { + fprintf(stderr, "Child didn't exit cleanly\n"); + return 1; + } + } else { + char dscr_str[16]; + + sprintf(dscr_str, "%ld", dscr); + execlp(prog, prog, "exec", dscr_str, NULL); + exit(1); + } + } + return 0; +} + +int main(int argc, char *argv[]) +{ + if (argc == 3 && !strcmp(argv[1], "exec")) { + unsigned long parent_dscr; + + parent_dscr = atoi(argv[2]); + do_exec(parent_dscr); + } else if (argc != 1) { + fprintf(stderr, "Usage: %s\n", argv[0]); + exit(1); + } + + prog = argv[0]; + return test_harness(dscr_inherit_exec, "dscr_inherit_exec_test"); +} diff --git a/tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c b/tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c new file mode 100644 index 000000000..f9dfd3d3c --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/dscr_inherit_test.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * POWER Data Stream Control Register (DSCR) fork test + * + * This testcase modifies the DSCR using mtspr, forks and then + * verifies that the child process has the correct changed DSCR + * value using mfspr. + * + * When using the privilege state SPR, the instructions such as + * mfspr or mtspr are priviledged and the kernel emulates them + * for us. Instructions using problem state SPR can be exuecuted + * directly without any emulation if the HW supports them. Else + * they also get emulated by the kernel. + * + * Copyright 2012, Anton Blanchard, IBM Corporation. + * Copyright 2015, Anshuman Khandual, IBM Corporation. + */ +#include "dscr.h" + +int dscr_inherit(void) +{ + unsigned long i, dscr = 0; + pid_t pid; + + SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR)); + + srand(getpid()); + set_dscr(dscr); + + for (i = 0; i < COUNT; i++) { + unsigned long cur_dscr, cur_dscr_usr; + + dscr++; + if (dscr > DSCR_MAX) + dscr = 0; + + if (i % 2 == 0) + set_dscr_usr(dscr); + else + set_dscr(dscr); + + pid = fork(); + if (pid == -1) { + perror("fork() failed"); + exit(1); + } else if (pid) { + int status; + + if (waitpid(pid, &status, 0) == -1) { + perror("waitpid() failed"); + exit(1); + } + + if (!WIFEXITED(status)) { + fprintf(stderr, "Child didn't exit cleanly\n"); + exit(1); + } + + if (WEXITSTATUS(status) != 0) { + fprintf(stderr, "Child didn't exit cleanly\n"); + return 1; + } + } else { + cur_dscr = get_dscr(); + if (cur_dscr != dscr) { + fprintf(stderr, "Kernel DSCR should be %ld " + "but is %ld\n", dscr, cur_dscr); + exit(1); + } + + cur_dscr_usr = get_dscr_usr(); + if (cur_dscr_usr != dscr) { + fprintf(stderr, "User DSCR should be %ld " + "but is %ld\n", dscr, cur_dscr_usr); + exit(1); + } + exit(0); + } + } + return 0; +} + +int main(int argc, char *argv[]) +{ + return test_harness(dscr_inherit, "dscr_inherit_test"); +} diff --git a/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c new file mode 100644 index 000000000..f20d1c166 --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * POWER Data Stream Control Register (DSCR) sysfs interface test + * + * This test updates to system wide DSCR default through the sysfs interface + * and then verifies that all the CPU specific DSCR defaults are updated as + * well verified from their sysfs interfaces. + * + * Copyright 2015, Anshuman Khandual, IBM Corporation. + */ +#include "dscr.h" + +static int check_cpu_dscr_default(char *file, unsigned long val) +{ + char buf[10]; + int fd, rc; + + fd = open(file, O_RDWR); + if (fd == -1) { + perror("open() failed"); + return 1; + } + + rc = read(fd, buf, sizeof(buf)); + if (rc == -1) { + perror("read() failed"); + close(fd); + return 1; + } + close(fd); + + buf[rc] = '\0'; + if (strtol(buf, NULL, 16) != val) { + printf("DSCR match failed: %ld (system) %ld (cpu)\n", + val, strtol(buf, NULL, 16)); + return 1; + } + return 0; +} + +static int check_all_cpu_dscr_defaults(unsigned long val) +{ + DIR *sysfs; + struct dirent *dp; + char file[LEN_MAX]; + + sysfs = opendir(CPU_PATH); + if (!sysfs) { + perror("opendir() failed"); + return 1; + } + + while ((dp = readdir(sysfs))) { + int len; + + if (!(dp->d_type & DT_DIR)) + continue; + if (!strcmp(dp->d_name, "cpuidle")) + continue; + if (!strstr(dp->d_name, "cpu")) + continue; + + len = snprintf(file, LEN_MAX, "%s%s/dscr", CPU_PATH, dp->d_name); + if (len >= LEN_MAX) + continue; + if (access(file, F_OK)) + continue; + + if (check_cpu_dscr_default(file, val)) { + closedir(sysfs); + return 1; + } + } + closedir(sysfs); + return 0; +} + +int dscr_sysfs(void) +{ + unsigned long orig_dscr_default; + int i, j; + + SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR)); + + orig_dscr_default = get_default_dscr(); + for (i = 0; i < COUNT; i++) { + for (j = 0; j < DSCR_MAX; j++) { + set_default_dscr(j); + if (check_all_cpu_dscr_defaults(j)) + goto fail; + } + } + set_default_dscr(orig_dscr_default); + return 0; +fail: + set_default_dscr(orig_dscr_default); + return 1; +} + +int main(int argc, char *argv[]) +{ + return test_harness(dscr_sysfs, "dscr_sysfs_test"); +} diff --git a/tools/testing/selftests/powerpc/dscr/dscr_sysfs_thread_test.c b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_thread_test.c new file mode 100644 index 000000000..191ed126f --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_thread_test.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * POWER Data Stream Control Register (DSCR) sysfs thread test + * + * This test updates the system wide DSCR default value through + * sysfs interface which should then update all the CPU specific + * DSCR default values which must also be then visible to threads + * executing on individual CPUs on the system. + * + * Copyright 2015, Anshuman Khandual, IBM Corporation. + */ +#define _GNU_SOURCE +#include "dscr.h" + +static int test_thread_dscr(unsigned long val) +{ + unsigned long cur_dscr, cur_dscr_usr; + + cur_dscr = get_dscr(); + cur_dscr_usr = get_dscr_usr(); + + if (val != cur_dscr) { + printf("[cpu %d] Kernel DSCR should be %ld but is %ld\n", + sched_getcpu(), val, cur_dscr); + return 1; + } + + if (val != cur_dscr_usr) { + printf("[cpu %d] User DSCR should be %ld but is %ld\n", + sched_getcpu(), val, cur_dscr_usr); + return 1; + } + return 0; +} + +static int check_cpu_dscr_thread(unsigned long val) +{ + cpu_set_t mask; + int cpu; + + for (cpu = 0; cpu < CPU_SETSIZE; cpu++) { + CPU_ZERO(&mask); + CPU_SET(cpu, &mask); + if (sched_setaffinity(0, sizeof(mask), &mask)) + continue; + + if (test_thread_dscr(val)) + return 1; + } + return 0; + +} + +int dscr_sysfs_thread(void) +{ + unsigned long orig_dscr_default; + int i, j; + + SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR)); + + orig_dscr_default = get_default_dscr(); + for (i = 0; i < COUNT; i++) { + for (j = 0; j < DSCR_MAX; j++) { + set_default_dscr(j); + if (check_cpu_dscr_thread(j)) + goto fail; + } + } + set_default_dscr(orig_dscr_default); + return 0; +fail: + set_default_dscr(orig_dscr_default); + return 1; +} + +int main(int argc, char *argv[]) +{ + return test_harness(dscr_sysfs_thread, "dscr_sysfs_thread_test"); +} diff --git a/tools/testing/selftests/powerpc/dscr/dscr_user_test.c b/tools/testing/selftests/powerpc/dscr/dscr_user_test.c new file mode 100644 index 000000000..e09072446 --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/dscr_user_test.c @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * POWER Data Stream Control Register (DSCR) SPR test + * + * This test modifies the DSCR value through both the SPR number + * based mtspr instruction and then makes sure that the same is + * reflected through mfspr instruction using either of the SPR + * numbers. + * + * When using the privilege state SPR, the instructions such as + * mfspr or mtspr are priviledged and the kernel emulates them + * for us. Instructions using problem state SPR can be exuecuted + * directly without any emulation if the HW supports them. Else + * they also get emulated by the kernel. + * + * Copyright 2013, Anton Blanchard, IBM Corporation. + * Copyright 2015, Anshuman Khandual, IBM Corporation. + */ +#include "dscr.h" + +static int check_dscr(char *str) +{ + unsigned long cur_dscr, cur_dscr_usr; + + cur_dscr = get_dscr(); + cur_dscr_usr = get_dscr_usr(); + if (cur_dscr != cur_dscr_usr) { + printf("%s set, kernel get %lx != user get %lx\n", + str, cur_dscr, cur_dscr_usr); + return 1; + } + return 0; +} + +int dscr_user(void) +{ + int i; + + SKIP_IF(!have_hwcap2(PPC_FEATURE2_DSCR)); + + check_dscr(""); + + for (i = 0; i < COUNT; i++) { + set_dscr(i); + if (check_dscr("kernel")) + return 1; + } + + for (i = 0; i < COUNT; i++) { + set_dscr_usr(i); + if (check_dscr("user")) + return 1; + } + return 0; +} + +int main(int argc, char *argv[]) +{ + return test_harness(dscr_user, "dscr_user_test"); +} diff --git a/tools/testing/selftests/powerpc/dscr/settings b/tools/testing/selftests/powerpc/dscr/settings new file mode 100644 index 000000000..e7b941753 --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/settings @@ -0,0 +1 @@ +timeout=0 -- cgit v1.2.3