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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /arch/mips/kernel/syscall.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
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Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
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(). ...
Diffstat (limited to 'arch/mips/kernel/syscall.c')
-rw-r--r--arch/mips/kernel/syscall.c242
1 files changed, 242 insertions, 0 deletions
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
new file mode 100644
index 000000000..ae93a607d
--- /dev/null
+++ b/arch/mips/kernel/syscall.c
@@ -0,0 +1,242 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995, 1996, 1997, 2000, 2001, 05 by Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2001 MIPS Technologies, Inc.
+ */
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <linux/fs.h>
+#include <linux/smp.h>
+#include <linux/ptrace.h>
+#include <linux/string.h>
+#include <linux/syscalls.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+#include <linux/unistd.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/compiler.h>
+#include <linux/ipc.h>
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+#include <linux/elf.h>
+#include <linux/sched/task_stack.h>
+
+#include <asm/asm.h>
+#include <asm/asm-eva.h>
+#include <asm/branch.h>
+#include <asm/cachectl.h>
+#include <asm/cacheflush.h>
+#include <asm/asm-offsets.h>
+#include <asm/signal.h>
+#include <asm/sim.h>
+#include <asm/shmparam.h>
+#include <asm/sync.h>
+#include <asm/sysmips.h>
+#include <asm/switch_to.h>
+
+/*
+ * For historic reasons the pipe(2) syscall on MIPS has an unusual calling
+ * convention. It returns results in registers $v0 / $v1 which means there
+ * is no need for it to do verify the validity of a userspace pointer
+ * argument. Historically that used to be expensive in Linux. These days
+ * the performance advantage is negligible.
+ */
+asmlinkage int sysm_pipe(void)
+{
+ int fd[2];
+ int error = do_pipe_flags(fd, 0);
+ if (error)
+ return error;
+ current_pt_regs()->regs[3] = fd[1];
+ return fd[0];
+}
+
+SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
+ unsigned long, prot, unsigned long, flags, unsigned long,
+ fd, off_t, offset)
+{
+ if (offset & ~PAGE_MASK)
+ return -EINVAL;
+ return ksys_mmap_pgoff(addr, len, prot, flags, fd,
+ offset >> PAGE_SHIFT);
+}
+
+SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
+ unsigned long, prot, unsigned long, flags, unsigned long, fd,
+ unsigned long, pgoff)
+{
+ if (pgoff & (~PAGE_MASK >> 12))
+ return -EINVAL;
+
+ return ksys_mmap_pgoff(addr, len, prot, flags, fd,
+ pgoff >> (PAGE_SHIFT - 12));
+}
+
+save_static_function(sys_fork);
+save_static_function(sys_clone);
+save_static_function(sys_clone3);
+
+SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
+{
+ struct thread_info *ti = task_thread_info(current);
+
+ ti->tp_value = addr;
+ if (cpu_has_userlocal)
+ write_c0_userlocal(addr);
+
+ return 0;
+}
+
+static inline int mips_atomic_set(unsigned long addr, unsigned long new)
+{
+ unsigned long old, tmp;
+ struct pt_regs *regs;
+ unsigned int err;
+
+ if (unlikely(addr & 3))
+ return -EINVAL;
+
+ if (unlikely(!access_ok((const void __user *)addr, 4)))
+ return -EINVAL;
+
+ if (cpu_has_llsc && IS_ENABLED(CONFIG_WAR_R10000_LLSC)) {
+ __asm__ __volatile__ (
+ " .set push \n"
+ " .set arch=r4000 \n"
+ " li %[err], 0 \n"
+ "1: ll %[old], (%[addr]) \n"
+ " move %[tmp], %[new] \n"
+ "2: sc %[tmp], (%[addr]) \n"
+ " beqzl %[tmp], 1b \n"
+ "3: \n"
+ " .insn \n"
+ " .section .fixup,\"ax\" \n"
+ "4: li %[err], %[efault] \n"
+ " j 3b \n"
+ " .previous \n"
+ " .section __ex_table,\"a\" \n"
+ " "STR(PTR_WD)" 1b, 4b \n"
+ " "STR(PTR_WD)" 2b, 4b \n"
+ " .previous \n"
+ " .set pop \n"
+ : [old] "=&r" (old),
+ [err] "=&r" (err),
+ [tmp] "=&r" (tmp)
+ : [addr] "r" (addr),
+ [new] "r" (new),
+ [efault] "i" (-EFAULT)
+ : "memory");
+ } else if (cpu_has_llsc) {
+ __asm__ __volatile__ (
+ " .set push \n"
+ " .set "MIPS_ISA_ARCH_LEVEL" \n"
+ " li %[err], 0 \n"
+ "1: \n"
+ " " __SYNC(full, loongson3_war) " \n"
+ user_ll("%[old]", "(%[addr])")
+ " move %[tmp], %[new] \n"
+ "2: \n"
+ user_sc("%[tmp]", "(%[addr])")
+ " beqz %[tmp], 1b \n"
+ "3: \n"
+ " .insn \n"
+ " .section .fixup,\"ax\" \n"
+ "5: li %[err], %[efault] \n"
+ " j 3b \n"
+ " .previous \n"
+ " .section __ex_table,\"a\" \n"
+ " "STR(PTR_WD)" 1b, 5b \n"
+ " "STR(PTR_WD)" 2b, 5b \n"
+ " .previous \n"
+ " .set pop \n"
+ : [old] "=&r" (old),
+ [err] "=&r" (err),
+ [tmp] "=&r" (tmp)
+ : [addr] "r" (addr),
+ [new] "r" (new),
+ [efault] "i" (-EFAULT)
+ : "memory");
+ } else {
+ do {
+ preempt_disable();
+ ll_bit = 1;
+ ll_task = current;
+ preempt_enable();
+
+ err = __get_user(old, (unsigned int *) addr);
+ err |= __put_user(new, (unsigned int *) addr);
+ if (err)
+ break;
+ rmb();
+ } while (!ll_bit);
+ }
+
+ if (unlikely(err))
+ return err;
+
+ regs = current_pt_regs();
+ regs->regs[2] = old;
+ regs->regs[7] = 0; /* No error */
+
+ /*
+ * Don't let your children do this ...
+ */
+ __asm__ __volatile__(
+ " move $29, %0 \n"
+ " j syscall_exit \n"
+ : /* no outputs */
+ : "r" (regs));
+
+ /* unreached. Honestly. */
+ unreachable();
+}
+
+/*
+ * mips_atomic_set() normally returns directly via syscall_exit potentially
+ * clobbering static registers, so be sure to preserve them.
+ */
+save_static_function(sys_sysmips);
+
+SYSCALL_DEFINE3(sysmips, long, cmd, long, arg1, long, arg2)
+{
+ switch (cmd) {
+ case MIPS_ATOMIC_SET:
+ return mips_atomic_set(arg1, arg2);
+
+ case MIPS_FIXADE:
+ if (arg1 & ~3)
+ return -EINVAL;
+
+ if (arg1 & 1)
+ set_thread_flag(TIF_FIXADE);
+ else
+ clear_thread_flag(TIF_FIXADE);
+ if (arg1 & 2)
+ set_thread_flag(TIF_LOGADE);
+ else
+ clear_thread_flag(TIF_LOGADE);
+
+ return 0;
+
+ case FLUSH_CACHE:
+ __flush_cache_all();
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+/*
+ * No implemented yet ...
+ */
+SYSCALL_DEFINE3(cachectl, char *, addr, int, nbytes, int, op)
+{
+ return -ENOSYS;
+}