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/hyperv-iommu.c | 343 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 343 insertions(+) create mode 100644 drivers/iommu/hyperv-iommu.c (limited to 'drivers/iommu/hyperv-iommu.c') diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c new file mode 100644 index 000000000..8302db7f7 --- /dev/null +++ b/drivers/iommu/hyperv-iommu.c @@ -0,0 +1,343 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Hyper-V stub IOMMU driver. + * + * Copyright (C) 2019, Microsoft, Inc. + * + * Author : Lan Tianyu + */ + +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#include "irq_remapping.h" + +#ifdef CONFIG_IRQ_REMAP + +/* + * According 82093AA IO-APIC spec , IO APIC has a 24-entry Interrupt + * Redirection Table. Hyper-V exposes one single IO-APIC and so define + * 24 IO APIC remmapping entries. + */ +#define IOAPIC_REMAPPING_ENTRY 24 + +static cpumask_t ioapic_max_cpumask = { CPU_BITS_NONE }; +static struct irq_domain *ioapic_ir_domain; + +static int hyperv_ir_set_affinity(struct irq_data *data, + const struct cpumask *mask, bool force) +{ + struct irq_data *parent = data->parent_data; + struct irq_cfg *cfg = irqd_cfg(data); + int ret; + + /* Return error If new irq affinity is out of ioapic_max_cpumask. */ + if (!cpumask_subset(mask, &ioapic_max_cpumask)) + return -EINVAL; + + ret = parent->chip->irq_set_affinity(parent, mask, force); + if (ret < 0 || ret == IRQ_SET_MASK_OK_DONE) + return ret; + + send_cleanup_vector(cfg); + + return 0; +} + +static struct irq_chip hyperv_ir_chip = { + .name = "HYPERV-IR", + .irq_ack = apic_ack_irq, + .irq_set_affinity = hyperv_ir_set_affinity, +}; + +static int hyperv_irq_remapping_alloc(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs, + void *arg) +{ + struct irq_alloc_info *info = arg; + struct irq_data *irq_data; + int ret = 0; + + if (!info || info->type != X86_IRQ_ALLOC_TYPE_IOAPIC || nr_irqs > 1) + return -EINVAL; + + ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg); + if (ret < 0) + return ret; + + irq_data = irq_domain_get_irq_data(domain, virq); + if (!irq_data) { + irq_domain_free_irqs_common(domain, virq, nr_irqs); + return -EINVAL; + } + + irq_data->chip = &hyperv_ir_chip; + + /* + * Hypver-V IO APIC irq affinity should be in the scope of + * ioapic_max_cpumask because no irq remapping support. + */ + irq_data_update_affinity(irq_data, &ioapic_max_cpumask); + + return 0; +} + +static void hyperv_irq_remapping_free(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs) +{ + irq_domain_free_irqs_common(domain, virq, nr_irqs); +} + +static int hyperv_irq_remapping_select(struct irq_domain *d, + struct irq_fwspec *fwspec, + enum irq_domain_bus_token bus_token) +{ + /* Claim the only I/O APIC emulated by Hyper-V */ + return x86_fwspec_is_ioapic(fwspec); +} + +static const struct irq_domain_ops hyperv_ir_domain_ops = { + .select = hyperv_irq_remapping_select, + .alloc = hyperv_irq_remapping_alloc, + .free = hyperv_irq_remapping_free, +}; + +static const struct irq_domain_ops hyperv_root_ir_domain_ops; +static int __init hyperv_prepare_irq_remapping(void) +{ + struct fwnode_handle *fn; + int i; + const char *name; + const struct irq_domain_ops *ops; + + /* + * For a Hyper-V root partition, ms_hyperv_msi_ext_dest_id() + * will always return false. + */ + if (!hypervisor_is_type(X86_HYPER_MS_HYPERV) || + x86_init.hyper.msi_ext_dest_id()) + return -ENODEV; + + if (hv_root_partition) { + name = "HYPERV-ROOT-IR"; + ops = &hyperv_root_ir_domain_ops; + } else { + name = "HYPERV-IR"; + ops = &hyperv_ir_domain_ops; + } + + fn = irq_domain_alloc_named_id_fwnode(name, 0); + if (!fn) + return -ENOMEM; + + ioapic_ir_domain = + irq_domain_create_hierarchy(arch_get_ir_parent_domain(), + 0, IOAPIC_REMAPPING_ENTRY, fn, ops, NULL); + + if (!ioapic_ir_domain) { + irq_domain_free_fwnode(fn); + return -ENOMEM; + } + + if (hv_root_partition) + return 0; /* The rest is only relevant to guests */ + + /* + * Hyper-V doesn't provide irq remapping function for + * IO-APIC and so IO-APIC only accepts 8-bit APIC ID. + * Cpu's APIC ID is read from ACPI MADT table and APIC IDs + * in the MADT table on Hyper-v are sorted monotonic increasingly. + * APIC ID reflects cpu topology. There maybe some APIC ID + * gaps when cpu number in a socket is not power of two. Prepare + * max cpu affinity for IOAPIC irqs. Scan cpu 0-255 and set cpu + * into ioapic_max_cpumask if its APIC ID is less than 256. + */ + for (i = min_t(unsigned int, num_possible_cpus() - 1, 255); i >= 0; i--) + if (cpu_physical_id(i) < 256) + cpumask_set_cpu(i, &ioapic_max_cpumask); + + return 0; +} + +static int __init hyperv_enable_irq_remapping(void) +{ + if (x2apic_supported()) + return IRQ_REMAP_X2APIC_MODE; + return IRQ_REMAP_XAPIC_MODE; +} + +struct irq_remap_ops hyperv_irq_remap_ops = { + .prepare = hyperv_prepare_irq_remapping, + .enable = hyperv_enable_irq_remapping, +}; + +/* IRQ remapping domain when Linux runs as the root partition */ +struct hyperv_root_ir_data { + u8 ioapic_id; + bool is_level; + struct hv_interrupt_entry entry; +}; + +static void +hyperv_root_ir_compose_msi_msg(struct irq_data *irq_data, struct msi_msg *msg) +{ + u64 status; + u32 vector; + struct irq_cfg *cfg; + int ioapic_id; + const struct cpumask *affinity; + int cpu; + struct hv_interrupt_entry entry; + struct hyperv_root_ir_data *data = irq_data->chip_data; + struct IO_APIC_route_entry e; + + cfg = irqd_cfg(irq_data); + affinity = irq_data_get_effective_affinity_mask(irq_data); + cpu = cpumask_first_and(affinity, cpu_online_mask); + + vector = cfg->vector; + ioapic_id = data->ioapic_id; + + if (data->entry.source == HV_DEVICE_TYPE_IOAPIC + && data->entry.ioapic_rte.as_uint64) { + entry = data->entry; + + status = hv_unmap_ioapic_interrupt(ioapic_id, &entry); + + if (status != HV_STATUS_SUCCESS) + pr_debug("%s: unexpected unmap status %lld\n", __func__, status); + + data->entry.ioapic_rte.as_uint64 = 0; + data->entry.source = 0; /* Invalid source */ + } + + + status = hv_map_ioapic_interrupt(ioapic_id, data->is_level, cpu, + vector, &entry); + + if (status != HV_STATUS_SUCCESS) { + pr_err("%s: map hypercall failed, status %lld\n", __func__, status); + return; + } + + data->entry = entry; + + /* Turn it into an IO_APIC_route_entry, and generate MSI MSG. */ + e.w1 = entry.ioapic_rte.low_uint32; + e.w2 = entry.ioapic_rte.high_uint32; + + memset(msg, 0, sizeof(*msg)); + msg->arch_data.vector = e.vector; + msg->arch_data.delivery_mode = e.delivery_mode; + msg->arch_addr_lo.dest_mode_logical = e.dest_mode_logical; + msg->arch_addr_lo.dmar_format = e.ir_format; + msg->arch_addr_lo.dmar_index_0_14 = e.ir_index_0_14; +} + +static int hyperv_root_ir_set_affinity(struct irq_data *data, + const struct cpumask *mask, bool force) +{ + struct irq_data *parent = data->parent_data; + struct irq_cfg *cfg = irqd_cfg(data); + int ret; + + ret = parent->chip->irq_set_affinity(parent, mask, force); + if (ret < 0 || ret == IRQ_SET_MASK_OK_DONE) + return ret; + + send_cleanup_vector(cfg); + + return 0; +} + +static struct irq_chip hyperv_root_ir_chip = { + .name = "HYPERV-ROOT-IR", + .irq_ack = apic_ack_irq, + .irq_set_affinity = hyperv_root_ir_set_affinity, + .irq_compose_msi_msg = hyperv_root_ir_compose_msi_msg, +}; + +static int hyperv_root_irq_remapping_alloc(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs, + void *arg) +{ + struct irq_alloc_info *info = arg; + struct irq_data *irq_data; + struct hyperv_root_ir_data *data; + int ret = 0; + + if (!info || info->type != X86_IRQ_ALLOC_TYPE_IOAPIC || nr_irqs > 1) + return -EINVAL; + + ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg); + if (ret < 0) + return ret; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) { + irq_domain_free_irqs_common(domain, virq, nr_irqs); + return -ENOMEM; + } + + irq_data = irq_domain_get_irq_data(domain, virq); + if (!irq_data) { + kfree(data); + irq_domain_free_irqs_common(domain, virq, nr_irqs); + return -EINVAL; + } + + data->ioapic_id = info->devid; + data->is_level = info->ioapic.is_level; + + irq_data->chip = &hyperv_root_ir_chip; + irq_data->chip_data = data; + + return 0; +} + +static void hyperv_root_irq_remapping_free(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs) +{ + struct irq_data *irq_data; + struct hyperv_root_ir_data *data; + struct hv_interrupt_entry *e; + int i; + + for (i = 0; i < nr_irqs; i++) { + irq_data = irq_domain_get_irq_data(domain, virq + i); + + if (irq_data && irq_data->chip_data) { + data = irq_data->chip_data; + e = &data->entry; + + if (e->source == HV_DEVICE_TYPE_IOAPIC + && e->ioapic_rte.as_uint64) + hv_unmap_ioapic_interrupt(data->ioapic_id, + &data->entry); + + kfree(data); + } + } + + irq_domain_free_irqs_common(domain, virq, nr_irqs); +} + +static const struct irq_domain_ops hyperv_root_ir_domain_ops = { + .select = hyperv_irq_remapping_select, + .alloc = hyperv_root_irq_remapping_alloc, + .free = hyperv_root_irq_remapping_free, +}; + +#endif -- cgit v1.2.3