Linux kernel documentation tree maintained by Jonathan Corbet http://mirrors.hust.edu.cn/git/lwn.git/atom?h=docs-5.16-2 2021-11-11T12:09:34+00:00 2021-11-11T12:09:34+00:00 Like Xu likexu@tencent.com 2021-11-03T09:17:16+00:00 urn:sha1:5863702561e625903ec678551cb056a4b19e0b8a Just like what we do in the x86_get_event_constraints(), the PERF_X86_EVENT_LBR_SELECT flag should also be propagated to event->hw.flags so that the host lbr driver can save/restore MSR_LBR_SELECT for the special vlbr event created by KVM or BPF. Fixes: 097e4311cda9 ("perf/x86: Add constraint to create guest LBR event without hw counter") Reported-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Like Xu <likexu@tencent.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Wanpeng Li <wanpengli@tencent.com> Link: https://lore.kernel.org/r/20211103091716.59906-1-likexu@tencent.com 2021-11-11T12:09:34+00:00 Wanpeng Li wanpengli@tencent.com 2021-11-05T07:20:51+00:00 urn:sha1:0fe39a3929ac7af980347814d552a734b51adacf lbr_select in kvm guest has residual data even if kvm guest is poweroff. We can get residual data in the next boot. Because lbr_select is not reset during kvm vlbr release. Let's reset LBR_SELECT during vlbr reset. Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/1636096851-36623-1-git-send-email-wanpengli@tencent.com 2021-11-06T21:36:12+00:00 Linus Torvalds torvalds@linux-foundation.org 2021-11-06T21:36:12+00:00 urn:sha1:0c5c62ddf88c34bc83b66e4ac9beb2bb0e1887d4 Pull pci updates from Bjorn Helgaas: "Enumeration: - Conserve IRQs by setting up portdrv IRQs only when there are users (Jan Kiszka) - Rework and simplify _OSC negotiation for control of PCIe features (Joerg Roedel) - Remove struct pci_dev.driver pointer since it's redundant with the struct device.driver pointer (Uwe Kleine-König) Resource management: - Coalesce contiguous host bridge apertures from _CRS to accommodate BARs that cover more than one aperture (Kai-Heng Feng) Sysfs: - Check CAP_SYS_ADMIN before parsing user input (Krzysztof Wilczyński) - Return -EINVAL consistently from "store" functions (Krzysztof Wilczyński) - Use sysfs_emit() in endpoint "show" functions to avoid buffer overruns (Kunihiko Hayashi) PCIe native device hotplug: - Ignore Link Down/Up caused by resets during error recovery so endpoint drivers can remain bound to the device (Lukas Wunner) Virtualization: - Avoid bus resets on Atheros QCA6174, where they hang the device (Ingmar Klein) - Work around Pericom PI7C9X2G switch packet drop erratum by using store and forward mode instead of cut-through (Nathan Rossi) - Avoid trying to enable AtomicOps on VFs; the PF setting applies to all VFs (Selvin Xavier) MSI: - Document that /sys/bus/pci/devices/.../irq contains the legacy INTx interrupt or the IRQ of the first MSI (not MSI-X) vector (Barry Song) VPD: - Add pci_read_vpd_any() and pci_write_vpd_any() to access anywhere in the possible VPD space; use these to simplify the cxgb3 driver (Heiner Kallweit) Peer-to-peer DMA: - Add (not subtract) the bus offset when calculating DMA address (Wang Lu) ASPM: - Re-enable LTR at Downstream Ports so they don't report Unsupported Requests when reset or hot-added devices send LTR messages (Mingchuang Qiao) Apple PCIe controller driver: - Add driver for Apple M1 PCIe controller (Alyssa Rosenzweig, Marc Zyngier) Cadence PCIe controller driver: - Return success when probe succeeds instead of falling into error path (Li Chen) HiSilicon Kirin PCIe controller driver: - Reorganize PHY logic and add support for external PHY drivers (Mauro Carvalho Chehab) - Support PERST# GPIOs for HiKey970 external PEX 8606 bridge (Mauro Carvalho Chehab) - Add Kirin 970 support (Mauro Carvalho Chehab) - Make driver removable (Mauro Carvalho Chehab) Intel VMD host bridge driver: - If IOMMU supports interrupt remapping, leave VMD MSI-X remapping enabled (Adrian Huang) - Number each controller so we can tell them apart in /proc/interrupts (Chunguang Xu) - Avoid building on UML because VMD depends on x86 bare metal APIs (Johannes Berg) Marvell Aardvark PCIe controller driver: - Define macros for PCI_EXP_DEVCTL_PAYLOAD_* (Pali Rohár) - Set Max Payload Size to 512 bytes per Marvell spec (Pali Rohár) - Downgrade PIO Response Status messages to debug level (Marek Behún) - Preserve CRS SV (Config Request Retry Software Visibility) bit in emulated Root Control register (Pali Rohár) - Fix issue in configuring reference clock (Pali Rohár) - Don't clear status bits for masked interrupts (Pali Rohár) - Don't mask unused interrupts (Pali Rohár) - Avoid code repetition in advk_pcie_rd_conf() (Marek Behún) - Retry config accesses on CRS response (Pali Rohár) - Simplify emulated Root Capabilities initialization (Pali Rohár) - Fix several link training issues (Pali Rohár) - Fix link-up checking via LTSSM (Pali Rohár) - Fix reporting of Data Link Layer Link Active (Pali Rohár) - Fix emulation of W1C bits (Marek Behún) - Fix MSI domain .alloc() method to return zero on success (Marek Behún) - Read entire 16-bit MSI vector in MSI handler, not just low 8 bits (Marek Behún) - Clear Root Port I/O Space, Memory Space, and Bus Master Enable bits at startup; PCI core will set those as necessary (Pali Rohár) - When operating as a Root Port, set class code to "PCI Bridge" instead of the default "Mass Storage Controller" (Pali Rohár) - Add emulation for PCI_BRIDGE_CTL_BUS_RESET since aardvark doesn't implement this per spec (Pali Rohár) - Add emulation of option ROM BAR since aardvark doesn't implement this per spec (Pali Rohár) MediaTek MT7621 PCIe controller driver: - Add MediaTek MT7621 PCIe host controller driver and DT binding (Sergio Paracuellos) Qualcomm PCIe controller driver: - Add SC8180x compatible string (Bjorn Andersson) - Add endpoint controller driver and DT binding (Manivannan Sadhasivam) - Restructure to use of_device_get_match_data() (Prasad Malisetty) - Add SC7280-specific pcie_1_pipe_clk_src handling (Prasad Malisetty) Renesas R-Car PCIe controller driver: - Remove unnecessary includes (Geert Uytterhoeven) Rockchip DesignWare PCIe controller driver: - Add DT binding (Simon Xue) Socionext UniPhier Pro5 controller driver: - Serialize INTx masking/unmasking (Kunihiko Hayashi) Synopsys DesignWare PCIe controller driver: - Run dwc .host_init() method before registering MSI interrupt handler so we can deal with pending interrupts left by bootloader (Bjorn Andersson) - Clean up Kconfig dependencies (Andy Shevchenko) - Export symbols to allow more modular drivers (Luca Ceresoli) TI DRA7xx PCIe controller driver: - Allow host and endpoint drivers to be modules (Luca Ceresoli) - Enable external clock if present (Luca Ceresoli) TI J721E PCIe driver: - Disable PHY when probe fails after initializing it (Christophe JAILLET) MicroSemi Switchtec management driver: - Return error to application when command execution fails because an out-of-band reset has cleared the device BARs, Memory Space Enable, etc (Kelvin Cao) - Fix MRPC error status handling issue (Kelvin Cao) - Mask out other bits when reading of management VEP instance ID (Kelvin Cao) - Return EOPNOTSUPP instead of ENOTSUPP from sysfs show functions (Kelvin Cao) - Add check of event support (Logan Gunthorpe) Miscellaneous: - Remove unused pci_pool wrappers, which have been replaced by dma_pool (Cai Huoqing) - Use 'unsigned int' instead of bare 'unsigned' (Krzysztof Wilczyński) - Use kstrtobool() directly, sans strtobool() wrapper (Krzysztof Wilczyński) - Fix some sscanf(), sprintf() format mismatches (Krzysztof Wilczyński) - Update PCI subsystem information in MAINTAINERS (Krzysztof Wilczyński) - Correct some misspellings (Krzysztof Wilczyński)" * tag 'pci-v5.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (137 commits) PCI: Add ACS quirk for Pericom PI7C9X2G switches PCI: apple: Configure RID to SID mapper on device addition iommu/dart: Exclude MSI doorbell from PCIe device IOVA range PCI: apple: Implement MSI support PCI: apple: Add INTx and per-port interrupt support PCI: kirin: Allow removing the driver PCI: kirin: De-init the dwc driver PCI: kirin: Disable clkreq during poweroff sequence PCI: kirin: Move the power-off code to a common routine PCI: kirin: Add power_off support for Kirin 960 PHY PCI: kirin: Allow building it as a module PCI: kirin: Add MODULE_* macros PCI: kirin: Add Kirin 970 compatible PCI: kirin: Support PERST# GPIOs for HiKey970 external PEX 8606 bridge PCI: apple: Set up reference clocks when probing PCI: apple: Add initial hardware bring-up PCI: of: Allow matching of an interrupt-map local to a PCI device of/irq: Allow matching of an interrupt-map local to an interrupt controller irqdomain: Make of_phandle_args_to_fwspec() generally available PCI: Do not enable AtomicOps on VFs ... 2021-11-02T13:20:58+00:00 Linus Torvalds torvalds@linux-foundation.org 2021-11-02T13:20:58+00:00 urn:sha1:fc02cb2b37fe2cbf1d3334b9f0f0eab9431766c4 Pull networking updates from Jakub Kicinski: "Core: - Remove socket skb caches - Add a SO_RESERVE_MEM socket op to forward allocate buffer space and avoid memory accounting overhead on each message sent - Introduce managed neighbor entries - added by control plane and resolved by the kernel for use in acceleration paths (BPF / XDP right now, HW offload users will benefit as well) - Make neighbor eviction on link down controllable by userspace to work around WiFi networks with bad roaming implementations - vrf: Rework interaction with netfilter/conntrack - fq_codel: implement L4S style ce_threshold_ect1 marking - sch: Eliminate unnecessary RCU waits in mini_qdisc_pair_swap() BPF: - Add support for new btf kind BTF_KIND_TAG, arbitrary type tagging as implemented in LLVM14 - Introduce bpf_get_branch_snapshot() to capture Last Branch Records - Implement variadic trace_printk helper - Add a new Bloomfilter map type - Track <8-byte scalar spill and refill - Access hw timestamp through BPF's __sk_buff - Disallow unprivileged BPF by default - Document BPF licensing Netfilter: - Introduce egress hook for looking at raw outgoing packets - Allow matching on and modifying inner headers / payload data - Add NFT_META_IFTYPE to match on the interface type either from ingress or egress Protocols: - Multi-Path TCP: - increase default max additional subflows to 2 - rework forward memory allocation - add getsockopts: MPTCP_INFO, MPTCP_TCPINFO, MPTCP_SUBFLOW_ADDRS - MCTP flow support allowing lower layer drivers to configure msg muxing as needed - Automatic Multicast Tunneling (AMT) driver based on RFC7450 - HSR support the redbox supervision frames (IEC-62439-3:2018) - Support for the ip6ip6 encapsulation of IOAM - Netlink interface for CAN-FD's Transmitter Delay Compensation - Support SMC-Rv2 eliminating the current same-subnet restriction, by exploiting the UDP encapsulation feature of RoCE adapters - TLS: add SM4 GCM/CCM crypto support - Bluetooth: initial support for link quality and audio/codec offload Driver APIs: - Add a batched interface for RX buffer allocation in AF_XDP buffer pool - ethtool: Add ability to control transceiver modules' power mode - phy: Introduce supported interfaces bitmap to express MAC capabilities and simplify PHY code - Drop rtnl_lock from DSA .port_fdb_{add,del} callbacks New drivers: - WiFi driver for Realtek 8852AE 802.11ax devices (rtw89) - Ethernet driver for ASIX AX88796C SPI device (x88796c) Drivers: - Broadcom PHYs - support 72165, 7712 16nm PHYs - support IDDQ-SR for additional power savings - PHY support for QCA8081, QCA9561 PHYs - NXP DPAA2: support for IRQ coalescing - NXP Ethernet (enetc): support for software TCP segmentation - Renesas Ethernet (ravb) - support DMAC and EMAC blocks of Gigabit-capable IP found on RZ/G2L SoC - Intel 100G Ethernet - support for eswitch offload of TC/OvS flow API, including offload of GRE, VxLAN, Geneve tunneling - support application device queues - ability to assign Rx and Tx queues to application threads - PTP and PPS (pulse-per-second) extensions - Broadcom Ethernet (bnxt) - devlink health reporting and device reload extensions - Mellanox Ethernet (mlx5) - offload macvlan interfaces - support HW offload of TC rules involving OVS internal ports - support HW-GRO and header/data split - support application device queues - Marvell OcteonTx2: - add XDP support for PF - add PTP support for VF - Qualcomm Ethernet switch (qca8k): support for QCA8328 - Realtek Ethernet DSA switch (rtl8366rb) - support bridge offload - support STP, fast aging, disabling address learning - support for Realtek RTL8365MB-VC, a 4+1 port 10M/100M/1GE switch - Mellanox Ethernet/IB switch (mlxsw) - multi-level qdisc hierarchy offload (e.g. RED, prio and shaping) - offload root TBF qdisc as port shaper - support multiple routing interface MAC address prefixes - support for IP-in-IP with IPv6 underlay - MediaTek WiFi (mt76) - mt7921 - ASPM, 6GHz, SDIO and testmode support - mt7915 - LED and TWT support - Qualcomm WiFi (ath11k) - include channel rx and tx time in survey dump statistics - support for 80P80 and 160 MHz bandwidths - support channel 2 in 6 GHz band - spectral scan support for QCN9074 - support for rx decapsulation offload (data frames in 802.3 format) - Qualcomm phone SoC WiFi (wcn36xx) - enable Idle Mode Power Save (IMPS) to reduce power consumption during idle - Bluetooth driver support for MediaTek MT7922 and MT7921 - Enable support for AOSP Bluetooth extension in Qualcomm WCN399x and Realtek 8822C/8852A - Microsoft vNIC driver (mana) - support hibernation and kexec - Google vNIC driver (gve) - support for jumbo frames - implement Rx page reuse Refactor: - Make all writes to netdev->dev_addr go thru helpers, so that we can add this address to the address rbtree and handle the updates - Various TCP cleanups and optimizations including improvements to CPU cache use - Simplify the gnet_stats, Qdisc stats' handling and remove qdisc->running sequence counter - Driver changes and API updates to address devlink locking deficiencies" * tag 'net-next-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2122 commits) Revert "net: avoid double accounting for pure zerocopy skbs" selftests: net: add arp_ndisc_evict_nocarrier net: ndisc: introduce ndisc_evict_nocarrier sysctl parameter net: arp: introduce arp_evict_nocarrier sysctl parameter libbpf: Deprecate AF_XDP support kbuild: Unify options for BTF generation for vmlinux and modules selftests/bpf: Add a testcase for 64-bit bounds propagation issue. bpf: Fix propagation of signed bounds from 64-bit min/max into 32-bit. bpf: Fix propagation of bounds from 64-bit min/max into 32-bit and var_off. net: vmxnet3: remove multiple false checks in vmxnet3_ethtool.c net: avoid double accounting for pure zerocopy skbs tcp: rename sk_wmem_free_skb netdevsim: fix uninit value in nsim_drv_configure_vfs() selftests/bpf: Fix also no-alu32 strobemeta selftest bpf: Add missing map_delete_elem method to bloom filter map selftests/bpf: Add bloom map success test for userspace calls bpf: Add alignment padding for "map_extra" + consolidate holes bpf: Bloom filter map naming fixups selftests/bpf: Add test cases for struct_ops prog bpf: Add dummy BPF STRUCT_OPS for test purpose ... 2021-11-01T20:12:15+00:00 Linus Torvalds torvalds@linux-foundation.org 2021-11-01T20:12:15+00:00 urn:sha1:91e1c99e175ae6bb6be765c6fcd40e869f8f6aee Pull perf updates from Thomas Gleixner: "Core: - Allow ftrace to instrument parts of the perf core code - Add a new mem_hops field to perf_mem_data_src which allows to represent intra-node/package or inter-node/off-package details to prepare for next generation systems which have more hieararchy within the node/pacakge level. Tools: - Update for the new mem_hops field in perf_mem_data_src Arch: - A set of constraints fixes for the Intel uncore PMU - The usual set of small fixes and improvements for x86 and PPC" * tag 'perf-core-2021-10-31' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel: Fix ICL/SPR INST_RETIRED.PREC_DIST encodings powerpc/perf: Fix data source encodings for L2.1 and L3.1 accesses tools/perf: Add mem_hops field in perf_mem_data_src structure perf: Add mem_hops field in perf_mem_data_src structure perf: Add comment about current state of PERF_MEM_LVL_* namespace and remove an extra line perf/core: Allow ftrace for functions in kernel/event/core.c perf/x86: Add new event for AUX output counter index perf/x86: Add compiler barrier after updating BTS perf/x86/intel/uncore: Fix Intel SPR M3UPI event constraints perf/x86/intel/uncore: Fix Intel SPR M2PCIE event constraints perf/x86/intel/uncore: Fix Intel SPR IIO event constraints perf/x86/intel/uncore: Fix Intel SPR CHA event constraints perf/x86/intel/uncore: Fix Intel ICX IIO event constraints perf/x86/intel/uncore: Fix invalid unit check perf/x86/intel/uncore: Support extra IMC channel on Ice Lake server 2021-10-30T14:37:24+00:00 Stephane Eranian eranian@google.com 2021-10-14T00:12:14+00:00 urn:sha1:2de71ee153efa93099d2ab864acffeec70a8dcd5 This patch fixes the encoding for INST_RETIRED.PREC_DIST as published by Intel (download.01.org/perfmon/) for Icelake. The official encoding is event code 0x00 umask 0x1, a change from Skylake where it was code 0xc0 umask 0x1. With this patch applied it is possible to run: $ perf record -a -e cpu/event=0x00,umask=0x1/pp ..... Whereas before this would fail. To avoid problems with tools which may use the old code, we maintain the old encoding for Icelake. Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20211014001214.2680534-1-eranian@google.com 2021-10-18T14:20:15+00:00 Uwe Kleine-König u.kleine-koenig@pengutronix.de 2021-10-12T21:38:32+00:00 urn:sha1:ba51521b11a15caaae3fddd93c1ead2ffe6b557b Struct pci_driver contains a struct device_driver, so for PCI devices, it's easy to convert a device_driver * to a pci_driver * with to_pci_driver(). The device_driver * is in struct device, so we don't need to also keep track of the pci_driver * in struct pci_dev. Replace pdev->driver with to_pci_driver(). This is a step toward removing pci_dev->driver. [bhelgaas: split to separate patch] Link: https://lore.kernel.org/r/20211004125935.2300113-11-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> 2021-10-15T09:25:31+00:00 Adrian Hunter adrian.hunter@intel.com 2021-09-07T16:39:01+00:00 urn:sha1:8b8ff8cc3b8155c18162e8b1f70e1230db176862 PEBS-via-PT records contain a mask of applicable counters. To identify which event belongs to which counter, a side-band event is needed. Until now, there has been no side-band event, and consequently users were limited to using a single event. Add such a side-band event. Note the event is optimised to output only when the counter index changes for an event. That works only so long as all PEBS-via-PT events are scheduled together, which they are for a recording session because they are in a single group. Also no attribute bit is used to select the new event, so a new kernel is not compatible with older perf tools. The assumption being that PEBS-via-PT is sufficiently esoteric that users will not be troubled by this. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210907163903.11820-2-adrian.hunter@intel.com 2021-10-07T22:24:06+00:00 Jakub Kicinski kuba@kernel.org 2021-10-07T22:24:06+00:00 urn:sha1:9fe1155233c8290ca6e206053e531ef87f9026ea No conflicts. Signed-off-by: Jakub Kicinski <kuba@kernel.org> 2021-10-01T11:57:54+00:00 Kan Liang kan.liang@linux.intel.com 2021-09-28T15:19:03+00:00 urn:sha1:ecc2123e09f9e71ddc6c53d71e283b8ada685fe2 According to the latest event list, the event encoding 0xEF is only available on the first 4 counters. Add it into the event constraints table. Fixes: 6017608936c1 ("perf/x86/intel: Add Icelake support") Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/1632842343-25862-1-git-send-email-kan.liang@linux.intel.com