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2020-12-25Merge tag 'docs-5.11-2' of git://git.lwn.net/linuxLinus Torvalds1-1/+1
Pull documentation fixes from Jonathan Corbet: "A small set of late-arriving, small documentation fixes" * tag 'docs-5.11-2' of git://git.lwn.net/linux: docs: admin-guide: Fix default value of max_map_count in sysctl/vm.rst Documentation/submitting-patches: Document the SoB chain Documentation: process: Correct numbering docs: submitting-patches: Trivial - fix grammatical error
2020-12-23Merge tag 'for-5.11/dm-changes' of ↵Linus Torvalds1-1/+6
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper updates from Mike Snitzer: - Add DM verity support for signature verification with 2nd keyring - Fix DM verity to skip verity work if IO completes with error while system is shutting down - Add new DM multipath "IO affinity" path selector that maps IO destined to a given path to a specific CPU based on user provided mapping - Rename DM multipath path selector source files to have "dm-ps" prefix - Add REQ_NOWAIT support to some other simple DM targets that don't block in more elaborate ways waiting for IO - Export DM crypt's kcryptd workqueue via sysfs (WQ_SYSFS) - Fix error return code in DM's target_message() if empty message is received - A handful of other small cleanups * tag 'for-5.11/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm cache: simplify the return expression of load_mapping() dm ebs: avoid double unlikely() notation when using IS_ERR() dm verity: skip verity work if I/O error when system is shutting down dm crypt: export sysfs of kcryptd workqueue dm ioctl: fix error return code in target_message dm crypt: Constify static crypt_iv_operations dm: add support for REQ_NOWAIT to various targets dm: rename multipath path selector source files to have "dm-ps" prefix dm mpath: add IO affinity path selector dm verity: Add support for signature verification with 2nd keyring dm: remove unnecessary current->bio_list check when submitting split bio
2020-12-21docs: admin-guide: Fix default value of max_map_count in sysctl/vm.rstFengfei Xi1-1/+1
Since the default value of sysctl_max_map_count is defined as DEFAULT_MAX_MAP_COUNT from mm/util.c int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT; DEFAULT_MAX_MAP_COUNT is defined as 65530 (65535-5) in include/linux/mm.h #define MAPCOUNT_ELF_CORE_MARGIN (5) #define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN) Signed-off-by: Fengfei Xi <xi.fengfei@h3c.com> Link: https://lore.kernel.org/r/20201210082134.36957-1-xi.fengfei@h3c.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-12-20Merge tag 'perf-tools-2020-12-19' of ↵Linus Torvalds1-11/+70
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux Pull perf tools updates from Arnaldo Carvalho de Melo: "perf record: - Fix memory leak when using '--user-regs=?' to list registers aarch64 support: - Add aarch64 registers to 'perf record's' --user-regs command line option aarch64 hw tracing support: - Decode memory tagging properties - Improve ARM's auxtrace support - Add support for ARMv8.3-SPE perf kvm: - Add kvm-stat for arm64 perf stat: - Add --quiet option Cleanups: - Fixup function names wrt what is in libperf and what is in tools/perf Build: - Allow building without libbpf in older systems New kernel features: - Initial support for data/code page size sample type, more to come perf annotate: - Support MIPS instruction extended support perf stack unwinding: - Fix separate debug info files when using elfutils' libdw's unwinder perf vendor events: - Update Intel's Skylake client events to v50 - Add JSON metrics for ARM's imx8mm DDR Perf - Support printing metric groups for system PMUs perf build id: - Prep work for supporting having the build id provided by the kernel in PERF_RECORD_MMAP2 metadata events perf stat: - Support regex pattern in --for-each-cgroup pipe mode: - Allow to use stdio functions for pipe mode - Support 'perf report's' --header-only for pipe mode - Support pipe mode display in 'perf evlist' Documentation: - Update information about CAP_PERFMON" * tag 'perf-tools-2020-12-19' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (134 commits) perf mem: Factor out a function to generate sort order perf sort: Add sort option for data page size perf script: Support data page size tools headers UAPI: Update asm-generic/unistd.h tools headers cpufeatures: Sync with the kernel sources tools headers UAPI: Sync linux/prctl.h with the kernel sources tools headers UAPI: Sync linux/fscrypt.h with the kernel sources tools headers UAPI: Sync linux/const.h with the kernel headers tools arch x86: Sync the msr-index.h copy with the kernel sources perf trace beauty: Update copy of linux/socket.h with the kernel sources tools headers: Update linux/ctype.h with the kernel sources tools headers: Add conditional __has_builtin() tools headers: Get tools's linux/compiler.h closer to the kernel's tools headers UAPI: Sync linux/stat.h with the kernel sources tools headers: Syncronize linux/build_bug.h with the kernel sources perf tools: Reformat record's control fd man text perf config: Fix example command in manpage to conform to syntax specified in the SYNOPSIS section. perf test: Make sample-parsing test aware of PERF_SAMPLE_{CODE,DATA}_PAGE_SIZE perf tools: Add support to read build id from compressed elf perf debug: Add debug_set_file function ...
2020-12-20Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-0/+10
Pull KVM updates from Paolo Bonzini: "Much x86 work was pushed out to 5.12, but ARM more than made up for it. ARM: - PSCI relay at EL2 when "protected KVM" is enabled - New exception injection code - Simplification of AArch32 system register handling - Fix PMU accesses when no PMU is enabled - Expose CSV3 on non-Meltdown hosts - Cache hierarchy discovery fixes - PV steal-time cleanups - Allow function pointers at EL2 - Various host EL2 entry cleanups - Simplification of the EL2 vector allocation s390: - memcg accouting for s390 specific parts of kvm and gmap - selftest for diag318 - new kvm_stat for when async_pf falls back to sync x86: - Tracepoints for the new pagetable code from 5.10 - Catch VFIO and KVM irqfd events before userspace - Reporting dirty pages to userspace with a ring buffer - SEV-ES host support - Nested VMX support for wait-for-SIPI activity state - New feature flag (AVX512 FP16) - New system ioctl to report Hyper-V-compatible paravirtualization features Generic: - Selftest improvements" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (171 commits) KVM: SVM: fix 32-bit compilation KVM: SVM: Add AP_JUMP_TABLE support in prep for AP booting KVM: SVM: Provide support to launch and run an SEV-ES guest KVM: SVM: Provide an updated VMRUN invocation for SEV-ES guests KVM: SVM: Provide support for SEV-ES vCPU loading KVM: SVM: Provide support for SEV-ES vCPU creation/loading KVM: SVM: Update ASID allocation to support SEV-ES guests KVM: SVM: Set the encryption mask for the SVM host save area KVM: SVM: Add NMI support for an SEV-ES guest KVM: SVM: Guest FPU state save/restore not needed for SEV-ES guest KVM: SVM: Do not report support for SMM for an SEV-ES guest KVM: x86: Update __get_sregs() / __set_sregs() to support SEV-ES KVM: SVM: Add support for CR8 write traps for an SEV-ES guest KVM: SVM: Add support for CR4 write traps for an SEV-ES guest KVM: SVM: Add support for CR0 write traps for an SEV-ES guest KVM: SVM: Add support for EFER write traps for an SEV-ES guest KVM: SVM: Support string IO operations for an SEV-ES guest KVM: SVM: Support MMIO for an SEV-ES guest KVM: SVM: Create trace events for VMGEXIT MSR protocol processing KVM: SVM: Create trace events for VMGEXIT processing ...
2020-12-17Merge remote-tracking branch 'torvalds/master' into perf/coreArnaldo Carvalho de Melo55-552/+1897
To pick up fixes and check what UAPI headers need to be synched. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-12-17Merge tag 'arm-soc-drivers-5.11' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc Pull ARM SoC driver updates from Arnd Bergmann: "There are a couple of subsystems maintained by other people that merge their drivers through the SoC tree, those changes include: - The SCMI firmware framework gains support for sensor notifications and for controlling voltage domains. - A large update for the Tegra memory controller driver, integrating it better with the interconnect framework - The memory controller subsystem gains support for Mediatek MT8192 - The reset controller framework gains support for sharing pulsed resets For Soc specific drivers in drivers/soc, the main changes are - The Allwinner/sunxi MBUS gets a rework for the way it handles dma_map_ops and offsets between physical and dma address spaces. - An errata fix plus some cleanups for Freescale Layerscape SoCs - A cleanup for renesas drivers regarding MMIO accesses. - New SoC specific drivers for Mediatek MT8192 and MT8183 power domains - New SoC specific drivers for Aspeed AST2600 LPC bus control and SoC identification. - Core Power Domain support for Qualcomm MSM8916, MSM8939, SDM660 and SDX55. - A rework of the TI AM33xx 'genpd' power domain support to use information from DT instead of platform data - Support for TI AM64x SoCs - Allow building some Amlogic drivers as modules instead of built-in Finally, there are numerous cleanups and smaller bug fixes for Mediatek, Tegra, Samsung, Qualcomm, TI OMAP, Amlogic, Rockchips, Renesas, and Xilinx SoCs" * tag 'arm-soc-drivers-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (222 commits) soc: mediatek: mmsys: Specify HAS_IOMEM dependency for MTK_MMSYS firmware: xilinx: Properly align function parameter firmware: xilinx: Add a blank line after function declaration firmware: xilinx: Remove additional newline firmware: xilinx: Fix kernel-doc warnings firmware: xlnx-zynqmp: fix compilation warning soc: xilinx: vcu: add missing register NUM_CORE soc: xilinx: vcu: use vcu-settings syscon registers dt-bindings: soc: xlnx: extract xlnx, vcu-settings to separate binding soc: xilinx: vcu: drop useless success message clk: samsung: mark PM functions as __maybe_unused soc: samsung: exynos-chipid: initialize later - with arch_initcall soc: samsung: exynos-chipid: order list of SoCs by name memory: jz4780_nemc: Fix potential NULL dereference in jz4780_nemc_probe() memory: ti-emif-sram: only build for ARMv7 memory: tegra30: Support interconnect framework memory: tegra20: Support hardware versioning and clean up OPP table initialization dt-bindings: memory: tegra20-emc: Document opp-supported-hw property soc: rockchip: io-domain: Fix error return code in rockchip_iodomain_probe() reset-controller: ti: force the write operation when assert or deassert ...
2020-12-17Merge tag 'iommu-updates-v5.11' of ↵Linus Torvalds1-5/+0
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull IOMMU updates from Will Deacon: "There's a good mixture of improvements to the core code and driver changes across the board. One thing worth pointing out is that this includes a quirk to work around behaviour in the i915 driver (see 65f746e8285f ("iommu: Add quirk for Intel graphic devices in map_sg")), which otherwise interacts badly with the conversion of the intel IOMMU driver over to the DMA-IOMMU APU but has being fixed properly in the DRM tree. We'll revert the quirk later this cycle once we've confirmed that things don't fall apart without it. Summary: - IOVA allocation optimisations and removal of unused code - Introduction of DOMAIN_ATTR_IO_PGTABLE_CFG for parameterising the page-table of an IOMMU domain - Support for changing the default domain type in sysfs - Optimisation to the way in which identity-mapped regions are created - Driver updates: * Arm SMMU updates, including continued work on Shared Virtual Memory * Tegra SMMU updates, including support for PCI devices * Intel VT-D updates, including conversion to the IOMMU-DMA API - Cleanup, kerneldoc and minor refactoring" * tag 'iommu-updates-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (50 commits) iommu/amd: Add sanity check for interrupt remapping table length macros dma-iommu: remove __iommu_dma_mmap iommu/io-pgtable: Remove tlb_flush_leaf iommu: Stop exporting free_iova_mem() iommu: Stop exporting alloc_iova_mem() iommu: Delete split_and_remove_iova() iommu/io-pgtable-arm: Remove unused 'level' parameter from iopte_type() macro iommu: Defer the early return in arm_(v7s/lpae)_map iommu: Improve the performance for direct_mapping iommu: avoid taking iova_rbtree_lock twice iommu/vt-d: Avoid GFP_ATOMIC where it is not needed iommu/vt-d: Remove set but not used variable iommu: return error code when it can't get group iommu: Fix htmldocs warnings in sysfs-kernel-iommu_groups iommu: arm-smmu-impl: Add a space before open parenthesis iommu: arm-smmu-impl: Use table to list QCOM implementations iommu/arm-smmu: Move non-strict mode to use io_pgtable_domain_attr iommu/arm-smmu: Add support for pagetable config domain attribute iommu: Document usage of "/sys/kernel/iommu_groups/<grp_id>/type" file iommu: Take lock before reading iommu group default domain type ...
2020-12-16Merge tag 'pstore-v5.11-rc1' of ↵Linus Torvalds1-5/+2
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull pstore updates from Kees Cook: - Clean up unused but exposed API (Christoph Hellwig) - Provide KCONFIG for default size of kmsg buffer (Vasile-Laurentiu Stanimir) * tag 'pstore-v5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: pstore: Move kmsg_bytes default into Kconfig pstore/blk: remove {un,}register_pstore_blk pstore/blk: update the command line example pstore/zone: cap the maximum device size
2020-12-16kdump: append uts_namespace.name offset to VMCOREINFOAlexander Egorenkov1-0/+6
The offset of the field 'init_uts_ns.name' has changed since commit 9a56493f6942 ("uts: Use generic ns_common::count"). Make the offset of the field 'uts_namespace.name' available in VMCOREINFO because tools like 'crash-utility' and 'makedumpfile' must be able to read it from crash dumps. Link: https://lore.kernel.org/r/159644978167.604812.1773586504374412107.stgit@localhost.localdomain Link: https://lkml.kernel.org/r/20200930102328.396488-1-egorenar@linux.ibm.com Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com> Acked-by: lijiang <lijiang@redhat.com> Acked-by: Baoquan He <bhe@redhat.com> Cc: Dave Young <dyoung@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: "Eric W . Biederman" <ebiederm@xmission.com> Cc: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Kees Cook <keescook@chromium.org> Cc: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-16Merge branch 'akpm' (patches from Andrew)Linus Torvalds2-24/+12
Merge more updates from Andrew Morton: "More MM work: a memcg scalability improvememt" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm/lru: revise the comments of lru_lock mm/lru: introduce relock_page_lruvec() mm/lru: replace pgdat lru_lock with lruvec lock mm/swap.c: serialize memcg changes in pagevec_lru_move_fn mm/compaction: do page isolation first in compaction mm/lru: introduce TestClearPageLRU() mm/mlock: remove __munlock_isolate_lru_page() mm/mlock: remove lru_lock on TestClearPageMlocked mm/vmscan: remove lruvec reget in move_pages_to_lru mm/lru: move lock into lru_note_cost mm/swap.c: fold vm event PGROTATED into pagevec_move_tail_fn mm/memcg: add debug checking in lock_page_memcg mm: page_idle_get_page() does not need lru_lock mm/rmap: stop store reordering issue on page->mapping mm/vmscan: remove unnecessary lruvec adding mm/thp: narrow lru locking mm/thp: simplify lru_add_page_tail() mm/thp: use head for head page in lru_add_page_tail() mm/thp: move lru_add_page_tail() to huge_memory.c
2020-12-16mm/lru: revise the comments of lru_lockHugh Dickins2-24/+12
Since we changed the pgdat->lru_lock to lruvec->lru_lock, it's time to fix the incorrect comments in code. Also fixed some zone->lru_lock comment error from ancient time. etc. I struggled to understand the comment above move_pages_to_lru() (surely it never calls page_referenced()), and eventually realized that most of it had got separated from shrink_active_list(): move that comment back. Link: https://lkml.kernel.org/r/1604566549-62481-20-git-send-email-alex.shi@linux.alibaba.com Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Tejun Heo <tj@kernel.org> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Jann Horn <jannh@google.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Matthew Wilcox <willy@infradead.org> Cc: Alexander Duyck <alexander.duyck@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: "Chen, Rong A" <rong.a.chen@intel.com> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Michal Hocko <mhocko@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Mika Penttilä <mika.penttila@nextfour.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Shakeel Butt <shakeelb@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yang Shi <yang.shi@linux.alibaba.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-16Merge tag 'char-misc-5.11-rc1' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char / misc driver updates from Greg KH: "Here is the big char/misc driver update for 5.11-rc1. Continuing the tradition of previous -rc1 pulls, there seems to be more and more tiny driver subsystems flowing through this tree. Lots of different things, all of which have been in linux-next for a while with no reported issues: - extcon driver updates - habannalab driver updates - mei driver updates - uio driver updates - binder fixes and features added - soundwire driver updates - mhi bus driver updates - phy driver updates - coresight driver updates - fpga driver updates - speakup driver updates - slimbus driver updates - various small char and misc driver updates" * tag 'char-misc-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (305 commits) extcon: max77693: Fix modalias string extcon: fsa9480: Support TI TSU6111 variant extcon: fsa9480: Rewrite bindings in YAML and extend dt-bindings: extcon: add binding for TUSB320 extcon: Add driver for TI TUSB320 slimbus: qcom: fix potential NULL dereference in qcom_slim_prg_slew() siox: Make remove callback return void siox: Use bus_type functions for probe, remove and shutdown spmi: Add driver shutdown support spmi: fix some coding style issues at the spmi core spmi: get rid of a warning when built with W=1 uio: uio_hv_generic: use devm_kzalloc() for private data alloc uio: uio_fsl_elbc_gpcm: use device-managed allocators uio: uio_aec: use devm_kzalloc() for uio_info object uio: uio_cif: use devm_kzalloc() for uio_info object uio: uio_netx: use devm_kzalloc() for or uio_info object uio: uio_mf624: use devm_kzalloc() for uio_info object uio: uio_sercos3: use device-managed functions for simple allocs uio: uio_dmem_genirq: finalize conversion of probe to devm_ handlers uio: uio_dmem_genirq: convert simple allocations to device-managed ...
2020-12-16Merge tag 'usb-5.11-rc1' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB / Thunderbolt updates from Greg KH: "Here is the big USB and thunderbolt pull request for 5.11-rc1. Nothing major in here, just the grind of constant development to support new hardware and fix old issues: - thunderbolt updates for new USB4 hardware - cdns3 major driver updates - lots of typec updates and additions as more hardware is available - usb serial driver updates and fixes - other tiny USB driver updates All have been in linux-next with no reported issues" * tag 'usb-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (172 commits) usb: phy: convert comma to semicolon usb: ucsi: convert comma to semicolon usb: typec: tcpm: convert comma to semicolon usb: typec: tcpm: Update vbus_vsafe0v on init usb: typec: tcpci: Enable bleed discharge when auto discharge is enabled usb: typec: Add class for plug alt mode device USB: typec: tcpci: Add Bleed discharge to POWER_CONTROL definition USB: typec: tcpm: Add a 30ms room for tPSSourceOn in PR_SWAP USB: typec: tcpm: Fix PR_SWAP error handling USB: typec: tcpm: Hard Reset after not receiving a Request USB: gadget: f_fs: remove likely/unlikely usb: gadget: f_fs: Re-use SS descriptors for SuperSpeedPlus USB: gadget: f_midi: setup SuperSpeed Plus descriptors USB: gadget: f_acm: add support for SuperSpeed Plus USB: gadget: f_rndis: fix bitrate for SuperSpeed and above usb: typec: intel_pmc_mux: Configure cable generation value for USB4 MAINTAINERS: Add myself as a reviewer for CADENCE USB3 DRD IP DRIVER usb: chipidea: ci_hdrc_imx: Use of_device_get_match_data() usb: chipidea: usbmisc_imx: Use of_device_get_match_data() usb: cdns3: fix NULL pointer dereference on no platform data ...
2020-12-16Merge tag 'net-next-5.11' of ↵Linus Torvalds4-392/+0
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - support "prefer busy polling" NAPI operation mode, where we defer softirq for some time expecting applications to periodically busy poll - AF_XDP: improve efficiency by more batching and hindering the adjacency cache prefetcher - af_packet: make packet_fanout.arr size configurable up to 64K - tcp: optimize TCP zero copy receive in presence of partial or unaligned reads making zero copy a performance win for much smaller messages - XDP: add bulk APIs for returning / freeing frames - sched: support fragmenting IP packets as they come out of conntrack - net: allow virtual netdevs to forward UDP L4 and fraglist GSO skbs BPF: - BPF switch from crude rlimit-based to memcg-based memory accounting - BPF type format information for kernel modules and related tracing enhancements - BPF implement task local storage for BPF LSM - allow the FENTRY/FEXIT/RAW_TP tracing programs to use bpf_sk_storage Protocols: - mptcp: improve multiple xmit streams support, memory accounting and many smaller improvements - TLS: support CHACHA20-POLY1305 cipher - seg6: add support for SRv6 End.DT4/DT6 behavior - sctp: Implement RFC 6951: UDP Encapsulation of SCTP - ppp_generic: add ability to bridge channels directly - bridge: Connectivity Fault Management (CFM) support as is defined in IEEE 802.1Q section 12.14. Drivers: - mlx5: make use of the new auxiliary bus to organize the driver internals - mlx5: more accurate port TX timestamping support - mlxsw: - improve the efficiency of offloaded next hop updates by using the new nexthop object API - support blackhole nexthops - support IEEE 802.1ad (Q-in-Q) bridging - rtw88: major bluetooth co-existance improvements - iwlwifi: support new 6 GHz frequency band - ath11k: Fast Initial Link Setup (FILS) - mt7915: dual band concurrent (DBDC) support - net: ipa: add basic support for IPA v4.5 Refactor: - a few pieces of in_interrupt() cleanup work from Sebastian Andrzej Siewior - phy: add support for shared interrupts; get rid of multiple driver APIs and have the drivers write a full IRQ handler, slight growth of driver code should be compensated by the simpler API which also allows shared IRQs - add common code for handling netdev per-cpu counters - move TX packet re-allocation from Ethernet switch tag drivers to a central place - improve efficiency and rename nla_strlcpy - number of W=1 warning cleanups as we now catch those in a patchwork build bot Old code removal: - wan: delete the DLCI / SDLA drivers - wimax: move to staging - wifi: remove old WDS wifi bridging support" * tag 'net-next-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1922 commits) net: hns3: fix expression that is currently always true net: fix proc_fs init handling in af_packet and tls nfc: pn533: convert comma to semicolon af_vsock: Assign the vsock transport considering the vsock address flags af_vsock: Set VMADDR_FLAG_TO_HOST flag on the receive path vsock_addr: Check for supported flag values vm_sockets: Add VMADDR_FLAG_TO_HOST vsock flag vm_sockets: Add flags field in the vsock address data structure net: Disable NETIF_F_HW_TLS_TX when HW_CSUM is disabled tcp: Add logic to check for SYN w/ data in tcp_simple_retransmit net: mscc: ocelot: install MAC addresses in .ndo_set_rx_mode from process context nfc: s3fwrn5: Release the nfc firmware net: vxget: clean up sparse warnings mlxsw: spectrum_router: Use eXtended mezzanine to offload IPv4 router mlxsw: spectrum: Set KVH XLT cache mode for Spectrum2/3 mlxsw: spectrum_router_xm: Introduce basic XM cache flushing mlxsw: reg: Add Router LPM Cache Enable Register mlxsw: reg: Add Router LPM Cache ML Delete Register mlxsw: spectrum_router_xm: Implement L-value tracking for M-index mlxsw: reg: Add XM Router M Table Register ...
2020-12-15Merge branch 'akpm' (patches from Andrew)Linus Torvalds6-52/+43
Merge misc updates from Andrew Morton: - a few random little subsystems - almost all of the MM patches which are staged ahead of linux-next material. I'll trickle to post-linux-next work in as the dependents get merged up. Subsystems affected by this patch series: kthread, kbuild, ide, ntfs, ocfs2, arch, and mm (slab-generic, slab, slub, dax, debug, pagecache, gup, swap, shmem, memcg, pagemap, mremap, hmm, vmalloc, documentation, kasan, pagealloc, memory-failure, hugetlb, vmscan, z3fold, compaction, oom-kill, migration, cma, page-poison, userfaultfd, zswap, zsmalloc, uaccess, zram, and cleanups). * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (200 commits) mm: cleanup kstrto*() usage mm: fix fall-through warnings for Clang mm: slub: convert sysfs sprintf family to sysfs_emit/sysfs_emit_at mm: shmem: convert shmem_enabled_show to use sysfs_emit_at mm:backing-dev: use sysfs_emit in macro defining functions mm: huge_memory: convert remaining use of sprintf to sysfs_emit and neatening mm: use sysfs_emit for struct kobject * uses mm: fix kernel-doc markups zram: break the strict dependency from lzo zram: add stat to gather incompressible pages since zram set up zram: support page writeback mm/process_vm_access: remove redundant initialization of iov_r mm/zsmalloc.c: rework the list_add code in insert_zspage() mm/zswap: move to use crypto_acomp API for hardware acceleration mm/zswap: fix passing zero to 'PTR_ERR' warning mm/zswap: make struct kernel_param_ops definitions const userfaultfd/selftests: hint the test runner on required privilege userfaultfd/selftests: fix retval check for userfaultfd_open() userfaultfd/selftests: always dump something in modes userfaultfd: selftests: make __{s,u}64 format specifiers portable ...
2020-12-15zram: add stat to gather incompressible pages since zram set upMinchan Kim1-0/+1
Currently, zram supports the stat via /sys/block/zram/mm_stat to represent how many of incompressible pages are stored at the moment but it couldn't show how many times incompressible pages were wrote down since zram set up. It's also good indication to see how zram is effective in the system. Link: https://lkml.kernel.org/r/20201130201907.1284910-1-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15zram: support page writebackMinchan Kim1-0/+5
There is demand to writeback specific process pages to backing store instead of all idles pages in the system due to storage wear out concerns and to launching latency of apps which are most of the time idle but are critical for resume latency. This patch extends the writeback knob to support a specific page writeback. Link: https://lkml.kernel.org/r/20201020190506.3758660-1-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15userfaultfd: add user-mode only option to unprivileged_userfaultfd sysctl knobLokesh Gidra1-5/+10
With this change, when the knob is set to 0, it allows unprivileged users to call userfaultfd, like when it is set to 1, but with the restriction that page faults from only user-mode can be handled. In this mode, an unprivileged user (without SYS_CAP_PTRACE capability) must pass UFFD_USER_MODE_ONLY to userfaultd or the API will fail with EPERM. This enables administrators to reduce the likelihood that an attacker with access to userfaultfd can delay faulting kernel code to widen timing windows for other exploits. The default value of this knob is changed to 0. This is required for correct functioning of pipe mutex. However, this will fail postcopy live migration, which will be unnoticeable to the VM guests. To avoid this, set 'vm.userfault = 1' in /sys/sysctl.conf. The main reason this change is desirable as in the short term is that the Android userland will behave as with the sysctl set to zero. So without this commit, any Linux binary using userfaultfd to manage its memory would behave differently if run within the Android userland. For more details, refer to Andrea's reply [1]. [1] https://lore.kernel.org/lkml/20200904033438.GI9411@redhat.com/ Link: https://lkml.kernel.org/r/20201120030411.2690816-3-lokeshgidra@google.com Signed-off-by: Lokesh Gidra <lokeshgidra@google.com> Reviewed-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Peter Xu <peterx@redhat.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Stephen Smalley <stephen.smalley.work@gmail.com> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Daniel Colascione <dancol@dancol.org> Cc: "Joel Fernandes (Google)" <joel@joelfernandes.org> Cc: Kalesh Singh <kaleshsingh@google.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Jeff Vander Stoep <jeffv@google.com> Cc: <calin@google.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Shaohua Li <shli@fb.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Nitin Gupta <nigupta@nvidia.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Iurii Zaikin <yzaikin@google.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Daniel Colascione <dancol@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15docs/vm: remove unused 3 items explanation for /proc/vmstatAlex Shi1-15/+0
Commit 5647bc293ab1 ("mm: compaction: Move migration fail/success stats to migrate.c"), removed 3 items in /proc/vmstat. but the docs still has their explanation. let's remove them. "compact_blocks_moved", "compact_pages_moved", "compact_pagemigrate_failed", Link: https://lkml.kernel.org/r/1605520282-51993-1-git-send-email-alex.shi@linux.alibaba.com Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com> Reviewed-by: Zi Yan <ziy@nvidia.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Yang Shi <yang.shi@linux.alibaba.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15mm: memcontrol: account pagetables per nodeShakeel Butt1-0/+3
For many workloads, pagetable consumption is significant and it makes sense to expose it in the memory.stat for the memory cgroups. However at the moment, the pagetables are accounted per-zone. Converting them to per-node and using the right interface will correctly account for the memory cgroups as well. [akpm@linux-foundation.org: export __mod_lruvec_page_state to modules for arch/mips/kvm/] Link: https://lkml.kernel.org/r/20201130212541.2781790-3-shakeelb@google.com Signed-off-by: Shakeel Butt <shakeelb@google.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Roman Gushchin <guro@fb.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15docs: cgroup-v1: reflect the deprecation of the non-hierarchical modeRoman Gushchin2-32/+16
Update cgroup v1 docs after the deprecation of the non-hierarchical mode of the memory controller. Link: https://lkml.kernel.org/r/20201110220800.929549-3-guro@fb.com Signed-off-by: Roman Gushchin <guro@fb.com> Reviewed-by: Shakeel Butt <shakeelb@google.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15mm: memcontrol: add file_thp, shmem_thp to memory.statJohannes Weiner1-0/+8
As huge page usage in the page cache and for shmem files proliferates in our production environment, the performance monitoring team has asked for per-cgroup stats on those pages. We already track and export anon_thp per cgroup. We already track file THP and shmem THP per node, so making them per-cgroup is only a matter of switching from node to lruvec counters. All callsites are in places where the pages are charged and locked, so page->memcg is stable. [hannes@cmpxchg.org: add documentation] Link: https://lkml.kernel.org/r/20201026174029.GC548555@cmpxchg.org Link: https://lkml.kernel.org/r/20201022151844.489337-1-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Rik van Riel <riel@surriel.com> Reviewed-by: Shakeel Butt <shakeelb@google.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15Merge tag 'core-entry-2020-12-14' of ↵Linus Torvalds2-0/+91
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull core entry/exit updates from Thomas Gleixner: "A set of updates for entry/exit handling: - More generalization of entry/exit functionality - The consolidation work to reclaim TIF flags on x86 and also for non-x86 specific TIF flags which are solely relevant for syscall related work and have been moved into their own storage space. The x86 specific part had to be merged in to avoid a major conflict. - The TIF_NOTIFY_SIGNAL work which replaces the inefficient signal delivery mode of task work and results in an impressive performance improvement for io_uring. The non-x86 consolidation of this is going to come seperate via Jens. - The selective syscall redirection facility which provides a clean and efficient way to support the non-Linux syscalls of WINE by catching them at syscall entry and redirecting them to the user space emulation. This can be utilized for other purposes as well and has been designed carefully to avoid overhead for the regular fastpath. This includes the core changes and the x86 support code. - Simplification of the context tracking entry/exit handling for the users of the generic entry code which guarantee the proper ordering and protection. - Preparatory changes to make the generic entry code accomodate S390 specific requirements which are mostly related to their syscall restart mechanism" * tag 'core-entry-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits) entry: Add syscall_exit_to_user_mode_work() entry: Add exit_to_user_mode() wrapper entry_Add_enter_from_user_mode_wrapper entry: Rename exit_to_user_mode() entry: Rename enter_from_user_mode() docs: Document Syscall User Dispatch selftests: Add benchmark for syscall user dispatch selftests: Add kselftest for syscall user dispatch entry: Support Syscall User Dispatch on common syscall entry kernel: Implement selective syscall userspace redirection signal: Expose SYS_USER_DISPATCH si_code type x86: vdso: Expose sigreturn address on vdso to the kernel MAINTAINERS: Add entry for common entry code entry: Fix boot for !CONFIG_GENERIC_ENTRY x86: Support HAVE_CONTEXT_TRACKING_OFFSTACK context_tracking: Only define schedule_user() on !HAVE_CONTEXT_TRACKING_OFFSTACK archs sched: Detect call to schedule from critical entry code context_tracking: Don't implement exception_enter/exit() on CONFIG_HAVE_CONTEXT_TRACKING_OFFSTACK context_tracking: Introduce HAVE_CONTEXT_TRACKING_OFFSTACK x86: Reclaim unused x86 TI flags ...
2020-12-15Merge tag 'docs-5.11' of git://git.lwn.net/linuxLinus Torvalds42-66/+1721
Pull documentation updates from Jonathan Corbet: "A much quieter cycle for documentation (happily), with, one hopes, the bulk of the churn behind us. Significant stuff in this pull includes: - A set of new Chinese translations - Italian translation updates - A mechanism from Mauro to automatically format Documentation/features for the built docs - Automatic cross references without explicit :ref: markup - A new reset-controller document - An extensive new document on reporting problems from Thorsten That last patch also adds the CC-BY-4.0 license to LICENSES/dual; there was some discussion on this, but we seem to have consensus and an ack from Greg for that addition" * tag 'docs-5.11' of git://git.lwn.net/linux: (50 commits) docs: fix broken cross reference in translations/zh_CN docs: Note that sphinx 1.7 will be required soon docs: update requirements to install six module docs: reporting-issues: move 'outdated, need help' note to proper place docs: Update documentation to reflect what TAINT_CPU_OUT_OF_SPEC means docs: add a reset controller chapter to the driver API docs docs: make reporting-bugs.rst obsolete docs: Add a new text describing how to report bugs LICENSES: Add the CC-BY-4.0 license Documentation: fix multiple typos found in the admin-guide subdirectory Documentation: fix typos found in admin-guide subdirectory kernel-doc: Fix example in Nested structs/unions docs: clean up sysctl/kernel: titles, version docs: trace: fix event state structure name docs: nios2: add missing ReST file scripts: get_feat.pl: reduce table width for all features output scripts: get_feat.pl: change the group by order scripts: get_feat.pl: make complete table more coincise scripts: kernel-doc: fix parsing function-like typedefs Documentation: fix typos found in process, dev-tools, and doc-guide subdirectories ...
2020-12-15Merge tag 'x86_sgx_for_v5.11' of ↵Linus Torvalds1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 SGC support from Borislav Petkov: "Intel Software Guard eXtensions enablement. This has been long in the making, we were one revision number short of 42. :) Intel SGX is new hardware functionality that can be used by applications to populate protected regions of user code and data called enclaves. Once activated, the new hardware protects enclave code and data from outside access and modification. Enclaves provide a place to store secrets and process data with those secrets. SGX has been used, for example, to decrypt video without exposing the decryption keys to nosy debuggers that might be used to subvert DRM. Software has generally been rewritten specifically to run in enclaves, but there are also projects that try to run limited unmodified software in enclaves. Most of the functionality is concentrated into arch/x86/kernel/cpu/sgx/ except the addition of a new mprotect() hook to control enclave page permissions and support for vDSO exceptions fixup which will is used by SGX enclaves. All this work by Sean Christopherson, Jarkko Sakkinen and many others" * tag 'x86_sgx_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits) x86/sgx: Return -EINVAL on a zero length buffer in sgx_ioc_enclave_add_pages() x86/sgx: Fix a typo in kernel-doc markup x86/sgx: Fix sgx_ioc_enclave_provision() kernel-doc comment x86/sgx: Return -ERESTARTSYS in sgx_ioc_enclave_add_pages() selftests/sgx: Use a statically generated 3072-bit RSA key x86/sgx: Clarify 'laundry_list' locking x86/sgx: Update MAINTAINERS Documentation/x86: Document SGX kernel architecture x86/sgx: Add ptrace() support for the SGX driver x86/sgx: Add a page reclaimer selftests/x86: Add a selftest for SGX x86/vdso: Implement a vDSO for Intel SGX enclave call x86/traps: Attempt to fixup exceptions in vDSO before signaling x86/fault: Add a helper function to sanitize error code x86/vdso: Add support for exception fixup in vDSO functions x86/sgx: Add SGX_IOC_ENCLAVE_PROVISION x86/sgx: Add SGX_IOC_ENCLAVE_INIT x86/sgx: Add SGX_IOC_ENCLAVE_ADD_PAGES x86/sgx: Add SGX_IOC_ENCLAVE_CREATE x86/sgx: Add an SGX misc driver interface ...
2020-12-14Merge tag 'media/v5.11-1' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - some rework at the uAPI pixel format docs - the smiapp driver has started to gain support for MIPI CSS camera sensors and was renamed - two new sensor drivers: ov02a10 and ov9734 - Meson gained a driver for the 2D acceleration unit - Rockchip rkisp1 driver was promoted from staging - Cedrus driver gained support for VP8 - two new remote controller keymaps were added - the usual set of fixes cleanups and driver improvements * tag 'media/v5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (447 commits) media: ccs: Add support for obtaining C-PHY configuration from firmware media: ccs-pll: Print pixel rates media: ccs: Print written register values media: ccs: Add support for DDR OP SYS and OP PIX clocks media: ccs-pll: Add support for DDR OP system and pixel clocks media: ccs: Dual PLL support media: ccs-pll: Add trivial dual PLL support media: ccs-pll: Separate VT divisor limit calculation from the rest media: ccs-pll: Fix VT post-PLL divisor calculation media: ccs-pll: Make VT divisors 16-bit media: ccs-pll: Rework bounds checks media: ccs-pll: Print relevant information on PLL tree media: ccs-pll: Better separate OP and VT sub-tree calculation media: ccs-pll: Check for derating and overrating, support non-derating sensors media: ccs-pll: Split off VT subtree calculation media: ccs-pll: Add C-PHY support media: ccs-pll: Add sanity checks media: ccs-pll: Add support flexible OP PLL pixel clock divider media: ccs-pll: Support two cycles per pixel on OP domain media: ccs-pll: Add support for extended input PLL clock divider ...
2020-12-10docs: reporting-issues: move 'outdated, need help' note to proper placeThorsten Leemhuis1-12/+12
Move the 'this section is a placeholder for now and needs help by someone with domain knowledge' note one section upwards to the place where it belongs: the 'Decode failure messages' section. Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> Link: https://lore.kernel.org/r/d3894ba4a302beed661304cbcdc062c6dcfe3e58.1607489877.git.linux@leemhuis.info Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-12-09USB: UAS: introduce a quirk to set no_write_sameOliver Neukum1-0/+1
UAS does not share the pessimistic assumption storage is making that devices cannot deal with WRITE_SAME. A few devices supported by UAS, are reported to not deal well with WRITE_SAME. Those need a quirk. Add it to the device that needs it. Reported-by: David C. Partridge <david.partridge@perdrix.co.uk> Signed-off-by: Oliver Neukum <oneukum@suse.com> Cc: stable <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20201209152639.9195-1-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-12-08docs: Update documentation to reflect what TAINT_CPU_OUT_OF_SPEC meansMathieu Chouquet-Stringer2-6/+19
Here's a patch updating the meaning of TAINT_CPU_OUT_OF_SPEC after Borislav introduced changes in a7e1f67ed29f and upcoming patches in tip. TAINT_CPU_OUT_OF_SPEC now means a bit more what it implies as the flag isn't set just because of a CPU misconfiguration or mismatch. Historically it was for SMP kernel oops on an officially SMP incapable processor but now it also covers CPUs whose MSRs have been incorrectly poked at from userspace, drivers being used on non supported architectures, broken firmware, mismatched CPUs, ... Update documentation and script to reflect that. Signed-off-by: Mathieu Chouquet-Stringer <me@mathieu.digital> Link: https://lore.kernel.org/r/20201202153244.709752-1-me@mathieu.digital Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-12-08docs: make reporting-bugs.rst obsoleteThorsten Leemhuis5-5/+10
Make various places which point to Documentation/admin-guide/reporting-bugs.rst point to Documentation/admin-guide/reporting-issues.rst instead. That document is brand new and as of now is not completely finished. But even at this stage it's a lot more helpful and accurate than reporting-bugs.rst. Hence also add a note to reporting-bugs.rst, telling people they're better off reading reporting-issues.rst instead. reporting-bugs.rst is scheduled for removal once reporting-issues.rst is considered ready. Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> Link: https://lore.kernel.org/r/3df7c2d16de112b47bb6e6158138608e78562bf5.1607063223.git.linux@leemhuis.info Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-12-08docs: Add a new text describing how to report bugsThorsten Leemhuis2-0/+1632
Add a mostly finished document describing how to report issues with the Linux kernel to its developers. It is designed to be a lot more straight forward and easier to follow than the current text about this (Documentation/admin-guide/reporting-bugs.rst); at the same time the new text should be more helpful for people unfamiliar with the topic, as it provides a lot more details, too. The main work on the text is done, but some polishing is still needed. The text also needs to be reviewed by more people and a few issues still might need some discussion. To make these tasks easier, it was decided ([1]) to add this document to the kernel sources in parallel to the existing text; the latter will be removed once this text is considered good enough(tm). This document is quite long and provides a lot of details, but was carefully crafted to make sure it's can also serve people that are in a hurry. That's mainly achieved by having a TDLR and a step-by-step guide, which should be good enough for quite a lot of people. Everybody that wants or need more explanations can find them in a reference section, which describes all the needed steps in detail. Thanks to this structure the text can work for kernel developers that just need to look something up, experienced FLOSS contributors that are unfamiliar with the kernel's bug reporting workflow, and users reporting something upstream for the first time. The text is thus a bit like the kernel itself, which works well for embedded machines, a typical desktop PC, cloud servers, and HPC. The document was written in the hope it will improve the quality of the bug reports, especially those that come from people unfamiliar with how Linux kernel development works. Sadly quite a few reports from this group are currently of poor quality and/or get submitted to the wrong place. Part of the problem is the old reporting-bugs document, as it makes its essence hard to grasp; it's and also inaccurate and slightly outdated in a few spots. Due to this quite a few valid reports are ignored in the end, which is annoying for those that compiled them and bad for the kernel's quality. The document near the top points out that it's still unfinished, but nevertheless ready for consumption. Those few areas in the text that might need some further discussion contain a note pointing this out. Besides lack of review from core developers there is only one major issue left: the section 'Decode failure message' is known to be outdated: it's waiting for someone familiar with the topic to write something up or give at least provide some hints and pointers what to write there. The new document is dual-licensed under GPL-2.0+ or CC-BY-4.0. The latter is way more liberal and makes it attractive to use this text as a base when writing about this topic on websites or in books. This hopefully increases the chances that such texts are accurate and stick to official way of doing things. [1] https://lkml.kernel.org/r/20201118172958.5b014a44@lwn.net Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> CC: Thomas Gleixner <tglx@linutronix.de> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CC: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/e2db808f954744b79f10937a923d9c99bdca1fca.1607063223.git.linux@leemhuis.info Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-12-08Documentation: fix multiple typos found in the admin-guide subdirectoryAndrew Klychkov24-35/+35
Fix thirty five typos in dm-integrity.rst, dm-raid.rst, dm-zoned.rst, verity.rst, writecache.rst, tsx_async_abort.rst, md.rst, bttv.rst, dvb_references.rst, frontend-cardlist.rst, gspca-cardlist.rst, ipu3.rst, remote-controller.rst, mm/index.rst, numaperf.rst, userfaultfd.rst, module-signing.rst, imx-ddr.rst, intel-speed-select.rst, intel_pstate.rst, ramoops.rst, abi.rst, kernel.rst, vm.rst Signed-off-by: Andrew Klychkov <andrew.a.klychkov@gmail.com> Link: https://lore.kernel.org/r/20201204072848.GA49895@spblnx124.lan Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-12-08Documentation: fix typos found in admin-guide subdirectoryAndrew Klychkov8-12/+12
Fixed twelve typos in cppc_sysfs.rst, binderfs.rst, paride.rst, zram.rst, bug-hunting.rst, introduction.rst, usage.rst, dm-crypt.rst Signed-off-by: Andrew Klychkov <andrew.a.klychkov@gmail.com> Reviewed-by: Jonathan Corbet <corbet@lwn.net> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/20201204070235.GA48631@spblnx124.lan Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-12-08docs: clean up sysctl/kernel: titles, versionStephen Kitt1-7/+7
This cleans up a few titles with extra colons, and removes the reference to kernel 2.2. The docs don't yet cover *all* of 5.10 or 5.11, but I think they're close enough. Most entries are documented, and have been checked against current kernels. Signed-off-by: Stephen Kitt <steve@sk2.org> Link: https://lore.kernel.org/r/20201208074922.30359-1-steve@sk2.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-12-07Merge 5.10-rc7 into char-misc-nextGreg Kroah-Hartman1-5/+15
We want the fixes in here, and this resolves a merge issue with drivers/misc/habanalabs/common/memory.c. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-12-05dm verity: Add support for signature verification with 2nd keyringMickaël Salaün1-1/+6
Add a new configuration DM_VERITY_VERIFY_ROOTHASH_SIG_SECONDARY_KEYRING to enable dm-verity signatures to be verified against the secondary trusted keyring. Instead of relying on the builtin trusted keyring (with hard-coded certificates), the second trusted keyring can include certificate authorities from the builtin trusted keyring and child certificates loaded at run time. Using the secondary trusted keyring enables to use dm-verity disks (e.g. loop devices) signed by keys which did not exist at kernel build time, leveraging the certificate chain of trust model. In practice, this makes it possible to update certificates without kernel update and reboot, aligning with module and kernel (kexec) signature verification which already use the secondary trusted keyring. Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2020-12-04KVM: arm64: Add kvm-arm.mode early kernel parameterDavid Brazdil1-0/+10
Add an early parameter that allows users to select the mode of operation for KVM/arm64. For now, the only supported value is "protected". By passing this flag users opt into the hypervisor placing additional restrictions on the host kernel. These allow the hypervisor to spawn guests whose state is kept private from the host. Restrictions will include stage-2 address translation to prevent host from accessing guest memory, filtering its SMC calls, etc. Without this parameter, the default behaviour remains selecting VHE/nVHE based on hardware support and CONFIG_ARM64_VHE. Signed-off-by: David Brazdil <dbrazdil@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20201202184122.26046-2-dbrazdil@google.com
2020-12-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-5/+15
Conflicts: drivers/net/ethernet/ibm/ibmvnic.c Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-04docs: admin-guide: add a features listMauro Carvalho Chehab2-0/+4
Add a feature list matrix at the admin-guide. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/f6c1e366fbc7ce1c9c94c7dc6c7852c6377cc0be.1606748711.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-12-03media: admin-guide/pixfmt-meta-rkisp1.rst: pixfmt reference conforming with ↵Helen Koike1-2/+2
macro Fix warnings from make htmlddocs: Documentation/output/videodev2.h.rst:6: WARNING: undefined label: v4l2-meta-fmt-rk-isp1-params (if the link has no caption the label must precede a section header) Documentation/output/videodev2.h.rst:6: WARNING: undefined label: v4l2-meta-fmt-rk-isp1-stat-3a (if the link has no caption the label must precede a section header) Fixes: df22026aebd8 ("media: videodev2.h, v4l2-ioctl: add rkisp1 meta buffer format") Signed-off-by: Helen Koike <helen.koike@collabora.com> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-12-02Merge tag 'trace-v5.10-rc6-bootconfig' of ↵Linus Torvalds1-1/+3
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull bootconfig fixes from Steven Rostedt: "Have bootconfig size and checksum be little endian In case the bootconfig is created on one kind of endian machine, and then read on the other kind of endian kernel, the size and checksum will be incorrect. Instead, have both the size and checksum always be little endian and have the tool and the kernel convert it from little endian to or from the host endian" * tag 'trace-v5.10-rc6-bootconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: docs: bootconfig: Add the endianness of fields tools/bootconfig: Store size and checksum in footer as le32 bootconfig: Load size and checksum in the footer as le32
2020-12-02docs: Document Syscall User DispatchGabriel Krisman Bertazi2-0/+91
Explain the interface, provide some background and security notes. [ tglx: Add note about non-visibility, add it to the index and fix the kerneldoc warning ] Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Andy Lutomirski <luto@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20201127193238.821364-8-krisman@collabora.com
2020-12-02Merge tag 'trace-v5.10-rc6' of ↵Linus Torvalds1-5/+13
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing fixes from Steven Rostedt: - Use correct timestamp variable for ring buffer write stamp update - Fix up before stamp and write stamp when crossing ring buffer sub buffers - Keep a zero delta in ring buffer in slow path if cmpxchg fails - Fix trace_printk static buffer for archs that care - Fix ftrace record accounting for ftrace ops with trampolines - Fix DYNAMIC_FTRACE_WITH_DIRECT_CALLS dependency - Remove WARN_ON in hwlat tracer that triggers on something that is OK - Make "my_tramp" trampoline in ftrace direct sample code global - Fixes in the bootconfig tool for better alignment management * tag 'trace-v5.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: ring-buffer: Always check to put back before stamp when crossing pages ftrace: Fix DYNAMIC_FTRACE_WITH_DIRECT_CALLS dependency ftrace: Fix updating FTRACE_FL_TRAMP tracing: Fix alignment of static buffer tracing: Remove WARN_ON in start_thread() samples/ftrace: Mark my_tramp[12]? global ring-buffer: Set the right timestamp in the slow path of __rb_reserve_next() ring-buffer: Update write stamp with the correct ts docs: bootconfig: Update file format on initrd image tools/bootconfig: Align the bootconfig applied initrd image size to 4 tools/bootconfig: Fix to check the write failure correctly tools/bootconfig: Fix errno reference after printf()
2020-12-01pstore/blk: remove {un,}register_pstore_blkChristoph Hellwig1-4/+1
This interface is entirely unused, so remove them and various bits of unreachable code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20201016132047.3068029-4-hch@lst.de
2020-12-01pstore/blk: update the command line exampleChristoph Hellwig1-1/+1
Use the human readable device name instead of the device number, and add the required best_effort parameter. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: WeiXiong Liao <gmpy.liaowx@gmail.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20201016132047.3068029-3-hch@lst.de
2020-12-01docs: bootconfig: Add the endianness of fieldsMasami Hiramatsu1-1/+3
Add a description about the endianness of the size and the checksum fields. Those must be stored as le32 instead of u32. This will allow us to apply bootconfig to the cross build initrd without caring the endianness. Link: https://lkml.kernel.org/r/160583936246.547349.10964204130590955409.stgit@devnote2 Reported-by: Steven Rostedt <rostedt@goodmis.org> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-11-30Documentation/admin-guide: mark memmap parameter is supported by a few ↵Barry Song2-1/+2
architectures early_param memmap is only implemented on X86, MIPS and XTENSA. To avoid wasting users’ time on trying this on platform like ARM, mark it clearly. Signed-off-by: Barry Song <song.bao.hua@hisilicon.com> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Link: https://lore.kernel.org/r/20201128195121.2556-1-song.bao.hua@hisilicon.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-11-30Merge remote-tracking branch 'torvalds/master' into perf/coreArnaldo Carvalho de Melo2-2/+9
To pick up fixes. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-11-30Merge 5.10-rc6 into char-misc-nextGreg Kroah-Hartman1-0/+7
We need the fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>