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(). ... --- drivers/iommu/iommufd/ioas.c | 398 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 398 insertions(+) create mode 100644 drivers/iommu/iommufd/ioas.c (limited to 'drivers/iommu/iommufd/ioas.c') diff --git a/drivers/iommu/iommufd/ioas.c b/drivers/iommu/iommufd/ioas.c new file mode 100644 index 000000000..31577e9d4 --- /dev/null +++ b/drivers/iommu/iommufd/ioas.c @@ -0,0 +1,398 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES + */ +#include +#include +#include +#include + +#include "io_pagetable.h" + +void iommufd_ioas_destroy(struct iommufd_object *obj) +{ + struct iommufd_ioas *ioas = container_of(obj, struct iommufd_ioas, obj); + int rc; + + rc = iopt_unmap_all(&ioas->iopt, NULL); + WARN_ON(rc && rc != -ENOENT); + iopt_destroy_table(&ioas->iopt); + mutex_destroy(&ioas->mutex); +} + +struct iommufd_ioas *iommufd_ioas_alloc(struct iommufd_ctx *ictx) +{ + struct iommufd_ioas *ioas; + + ioas = iommufd_object_alloc(ictx, ioas, IOMMUFD_OBJ_IOAS); + if (IS_ERR(ioas)) + return ioas; + + iopt_init_table(&ioas->iopt); + INIT_LIST_HEAD(&ioas->hwpt_list); + mutex_init(&ioas->mutex); + return ioas; +} + +int iommufd_ioas_alloc_ioctl(struct iommufd_ucmd *ucmd) +{ + struct iommu_ioas_alloc *cmd = ucmd->cmd; + struct iommufd_ioas *ioas; + int rc; + + if (cmd->flags) + return -EOPNOTSUPP; + + ioas = iommufd_ioas_alloc(ucmd->ictx); + if (IS_ERR(ioas)) + return PTR_ERR(ioas); + + cmd->out_ioas_id = ioas->obj.id; + rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); + if (rc) + goto out_table; + iommufd_object_finalize(ucmd->ictx, &ioas->obj); + return 0; + +out_table: + iommufd_object_abort_and_destroy(ucmd->ictx, &ioas->obj); + return rc; +} + +int iommufd_ioas_iova_ranges(struct iommufd_ucmd *ucmd) +{ + struct iommu_iova_range __user *ranges; + struct iommu_ioas_iova_ranges *cmd = ucmd->cmd; + struct iommufd_ioas *ioas; + struct interval_tree_span_iter span; + u32 max_iovas; + int rc; + + if (cmd->__reserved) + return -EOPNOTSUPP; + + ioas = iommufd_get_ioas(ucmd, cmd->ioas_id); + if (IS_ERR(ioas)) + return PTR_ERR(ioas); + + down_read(&ioas->iopt.iova_rwsem); + max_iovas = cmd->num_iovas; + ranges = u64_to_user_ptr(cmd->allowed_iovas); + cmd->num_iovas = 0; + cmd->out_iova_alignment = ioas->iopt.iova_alignment; + interval_tree_for_each_span(&span, &ioas->iopt.reserved_itree, 0, + ULONG_MAX) { + if (!span.is_hole) + continue; + if (cmd->num_iovas < max_iovas) { + struct iommu_iova_range elm = { + .start = span.start_hole, + .last = span.last_hole, + }; + + if (copy_to_user(&ranges[cmd->num_iovas], &elm, + sizeof(elm))) { + rc = -EFAULT; + goto out_put; + } + } + cmd->num_iovas++; + } + rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); + if (rc) + goto out_put; + if (cmd->num_iovas > max_iovas) + rc = -EMSGSIZE; +out_put: + up_read(&ioas->iopt.iova_rwsem); + iommufd_put_object(&ioas->obj); + return rc; +} + +static int iommufd_ioas_load_iovas(struct rb_root_cached *itree, + struct iommu_iova_range __user *ranges, + u32 num) +{ + u32 i; + + for (i = 0; i != num; i++) { + struct iommu_iova_range range; + struct iopt_allowed *allowed; + + if (copy_from_user(&range, ranges + i, sizeof(range))) + return -EFAULT; + + if (range.start >= range.last) + return -EINVAL; + + if (interval_tree_iter_first(itree, range.start, range.last)) + return -EINVAL; + + allowed = kzalloc(sizeof(*allowed), GFP_KERNEL_ACCOUNT); + if (!allowed) + return -ENOMEM; + allowed->node.start = range.start; + allowed->node.last = range.last; + + interval_tree_insert(&allowed->node, itree); + } + return 0; +} + +int iommufd_ioas_allow_iovas(struct iommufd_ucmd *ucmd) +{ + struct iommu_ioas_allow_iovas *cmd = ucmd->cmd; + struct rb_root_cached allowed_iova = RB_ROOT_CACHED; + struct interval_tree_node *node; + struct iommufd_ioas *ioas; + struct io_pagetable *iopt; + int rc = 0; + + if (cmd->__reserved) + return -EOPNOTSUPP; + + ioas = iommufd_get_ioas(ucmd, cmd->ioas_id); + if (IS_ERR(ioas)) + return PTR_ERR(ioas); + iopt = &ioas->iopt; + + rc = iommufd_ioas_load_iovas(&allowed_iova, + u64_to_user_ptr(cmd->allowed_iovas), + cmd->num_iovas); + if (rc) + goto out_free; + + /* + * We want the allowed tree update to be atomic, so we have to keep the + * original nodes around, and keep track of the new nodes as we allocate + * memory for them. The simplest solution is to have a new/old tree and + * then swap new for old. On success we free the old tree, on failure we + * free the new tree. + */ + rc = iopt_set_allow_iova(iopt, &allowed_iova); +out_free: + while ((node = interval_tree_iter_first(&allowed_iova, 0, ULONG_MAX))) { + interval_tree_remove(node, &allowed_iova); + kfree(container_of(node, struct iopt_allowed, node)); + } + iommufd_put_object(&ioas->obj); + return rc; +} + +static int conv_iommu_prot(u32 map_flags) +{ + /* + * We provide no manual cache coherency ioctls to userspace and most + * architectures make the CPU ops for cache flushing privileged. + * Therefore we require the underlying IOMMU to support CPU coherent + * operation. Support for IOMMU_CACHE is enforced by the + * IOMMU_CAP_CACHE_COHERENCY test during bind. + */ + int iommu_prot = IOMMU_CACHE; + + if (map_flags & IOMMU_IOAS_MAP_WRITEABLE) + iommu_prot |= IOMMU_WRITE; + if (map_flags & IOMMU_IOAS_MAP_READABLE) + iommu_prot |= IOMMU_READ; + return iommu_prot; +} + +int iommufd_ioas_map(struct iommufd_ucmd *ucmd) +{ + struct iommu_ioas_map *cmd = ucmd->cmd; + unsigned long iova = cmd->iova; + struct iommufd_ioas *ioas; + unsigned int flags = 0; + int rc; + + if ((cmd->flags & + ~(IOMMU_IOAS_MAP_FIXED_IOVA | IOMMU_IOAS_MAP_WRITEABLE | + IOMMU_IOAS_MAP_READABLE)) || + cmd->__reserved) + return -EOPNOTSUPP; + if (cmd->iova >= ULONG_MAX || cmd->length >= ULONG_MAX) + return -EOVERFLOW; + + ioas = iommufd_get_ioas(ucmd, cmd->ioas_id); + if (IS_ERR(ioas)) + return PTR_ERR(ioas); + + if (!(cmd->flags & IOMMU_IOAS_MAP_FIXED_IOVA)) + flags = IOPT_ALLOC_IOVA; + rc = iopt_map_user_pages(ucmd->ictx, &ioas->iopt, &iova, + u64_to_user_ptr(cmd->user_va), cmd->length, + conv_iommu_prot(cmd->flags), flags); + if (rc) + goto out_put; + + cmd->iova = iova; + rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); +out_put: + iommufd_put_object(&ioas->obj); + return rc; +} + +int iommufd_ioas_copy(struct iommufd_ucmd *ucmd) +{ + struct iommu_ioas_copy *cmd = ucmd->cmd; + struct iommufd_ioas *src_ioas; + struct iommufd_ioas *dst_ioas; + unsigned int flags = 0; + LIST_HEAD(pages_list); + unsigned long iova; + int rc; + + iommufd_test_syz_conv_iova_id(ucmd, cmd->src_ioas_id, &cmd->src_iova, + &cmd->flags); + + if ((cmd->flags & + ~(IOMMU_IOAS_MAP_FIXED_IOVA | IOMMU_IOAS_MAP_WRITEABLE | + IOMMU_IOAS_MAP_READABLE))) + return -EOPNOTSUPP; + if (cmd->length >= ULONG_MAX || cmd->src_iova >= ULONG_MAX || + cmd->dst_iova >= ULONG_MAX) + return -EOVERFLOW; + + src_ioas = iommufd_get_ioas(ucmd, cmd->src_ioas_id); + if (IS_ERR(src_ioas)) + return PTR_ERR(src_ioas); + rc = iopt_get_pages(&src_ioas->iopt, cmd->src_iova, cmd->length, + &pages_list); + iommufd_put_object(&src_ioas->obj); + if (rc) + return rc; + + dst_ioas = iommufd_get_ioas(ucmd, cmd->dst_ioas_id); + if (IS_ERR(dst_ioas)) { + rc = PTR_ERR(dst_ioas); + goto out_pages; + } + + if (!(cmd->flags & IOMMU_IOAS_MAP_FIXED_IOVA)) + flags = IOPT_ALLOC_IOVA; + iova = cmd->dst_iova; + rc = iopt_map_pages(&dst_ioas->iopt, &pages_list, cmd->length, &iova, + conv_iommu_prot(cmd->flags), flags); + if (rc) + goto out_put_dst; + + cmd->dst_iova = iova; + rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); +out_put_dst: + iommufd_put_object(&dst_ioas->obj); +out_pages: + iopt_free_pages_list(&pages_list); + return rc; +} + +int iommufd_ioas_unmap(struct iommufd_ucmd *ucmd) +{ + struct iommu_ioas_unmap *cmd = ucmd->cmd; + struct iommufd_ioas *ioas; + unsigned long unmapped = 0; + int rc; + + ioas = iommufd_get_ioas(ucmd, cmd->ioas_id); + if (IS_ERR(ioas)) + return PTR_ERR(ioas); + + if (cmd->iova == 0 && cmd->length == U64_MAX) { + rc = iopt_unmap_all(&ioas->iopt, &unmapped); + if (rc) + goto out_put; + } else { + if (cmd->iova >= ULONG_MAX || cmd->length >= ULONG_MAX) { + rc = -EOVERFLOW; + goto out_put; + } + rc = iopt_unmap_iova(&ioas->iopt, cmd->iova, cmd->length, + &unmapped); + if (rc) + goto out_put; + } + + cmd->length = unmapped; + rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); + +out_put: + iommufd_put_object(&ioas->obj); + return rc; +} + +int iommufd_option_rlimit_mode(struct iommu_option *cmd, + struct iommufd_ctx *ictx) +{ + if (cmd->object_id) + return -EOPNOTSUPP; + + if (cmd->op == IOMMU_OPTION_OP_GET) { + cmd->val64 = ictx->account_mode == IOPT_PAGES_ACCOUNT_MM; + return 0; + } + if (cmd->op == IOMMU_OPTION_OP_SET) { + int rc = 0; + + if (!capable(CAP_SYS_RESOURCE)) + return -EPERM; + + xa_lock(&ictx->objects); + if (!xa_empty(&ictx->objects)) { + rc = -EBUSY; + } else { + if (cmd->val64 == 0) + ictx->account_mode = IOPT_PAGES_ACCOUNT_USER; + else if (cmd->val64 == 1) + ictx->account_mode = IOPT_PAGES_ACCOUNT_MM; + else + rc = -EINVAL; + } + xa_unlock(&ictx->objects); + + return rc; + } + return -EOPNOTSUPP; +} + +static int iommufd_ioas_option_huge_pages(struct iommu_option *cmd, + struct iommufd_ioas *ioas) +{ + if (cmd->op == IOMMU_OPTION_OP_GET) { + cmd->val64 = !ioas->iopt.disable_large_pages; + return 0; + } + if (cmd->op == IOMMU_OPTION_OP_SET) { + if (cmd->val64 == 0) + return iopt_disable_large_pages(&ioas->iopt); + if (cmd->val64 == 1) { + iopt_enable_large_pages(&ioas->iopt); + return 0; + } + return -EINVAL; + } + return -EOPNOTSUPP; +} + +int iommufd_ioas_option(struct iommufd_ucmd *ucmd) +{ + struct iommu_option *cmd = ucmd->cmd; + struct iommufd_ioas *ioas; + int rc = 0; + + if (cmd->__reserved) + return -EOPNOTSUPP; + + ioas = iommufd_get_ioas(ucmd, cmd->object_id); + if (IS_ERR(ioas)) + return PTR_ERR(ioas); + + switch (cmd->option_id) { + case IOMMU_OPTION_HUGE_PAGES: + rc = iommufd_ioas_option_huge_pages(cmd, ioas); + break; + default: + rc = -EOPNOTSUPP; + } + + iommufd_put_object(&ioas->obj); + return rc; +} -- cgit v1.2.3