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2022-12-13Merge tag 'drm-next-2022-12-13' of git://anongit.freedesktop.org/drm/drmLinus Torvalds2-6/+14
Pull drm updates from Dave Airlie: "The biggest highlight is that the accel subsystem framework is merged. Hopefully for 6.3 we will be able to line up a driver to use it. In drivers land, i915 enables DG2 support by default now, and nouveau has a big stability refactoring and initial ampere support, AMD includes new hw IP support and should build on ARM again. There is also an ofdrm driver to take over offb on platforms it's used. Stuff outside my tree, the dma-buf patches hit a few places, the vc4 firmware changes also do, and i915 has some interactions with MEI for discrete GPUs. I think all of those should have been acked/reviewed by relevant parties. New driver: - ofdrm - replacement for offb fbdev: - add support for nomodeset fourcc: - add Vivante tiled modifier core: - atomic-helpers: CRTC primary plane test fixes, fb access hooks - connector: TV API consistency, cmdline parser improvements - send connector hotplug on cleanup - sort makefile objects tests: - sort kunit tests - improve DP-MST tests - add kunit helpers to create a device sched: - module param for scheduling policy - refcounting fix buddy: - add back random seed log ttm: - convert ttm_resource to size_t - optimize pool allocations edid: - HFVSDB parsing support fixes - logging/debug improvements - DSC quirks dma-buf: - Add unlocked vmap and attachment mapping - move drivers to common locking convention - locking improvements firmware: - new API for rPI firmware and vc4 xilinx: - zynqmp: displayport bridge support - dpsub fix bridge: - adv7533: Remove dynamic lane switching - it6505: Runtime PM support, sync improvements - ps8640: Handle AUX defer messages - tc358775: Drop soft-reset over I2C panel: - panel-edp: Add INX N116BGE-EA2 C2 and C4 support. - Jadard JD9365DA-H3 - NewVision NV3051D amdgpu: - DCN support on ARM - DCN 2.1 secure display - Sienna Cichlid mode2 reset fixes - new GC 11.x firmware versions - drop AMD specific DSC workarounds in favour of drm code - clang warning fixes - scheduler rework - SR-IOV fixes - GPUVM locking fixes - fix memory leak in CS IOCTL error path - flexible array updates - enable new GC/PSP/SMU/NBIO IP - GFX preemption support for gfx9 amdkfd: - cache size fixes - userptr fixes - enable cooperative launch on gfx 10.3 - enable GC 11.0.4 KFD support radeon: - replace kmap with kmap_local_page - ACPI ref count fix - HDA audio notifier support i915: - DG2 enabled by default - MTL enablement work - hotplug refactoring - VBT improvements - Display and watermark refactoring - ADL-P workaround - temp disable runtime_pm for discrete- - fix for A380 as a secondary GPU - Wa_18017747507 for DG2 - CS timestamp support fixes for gen5 and earlier - never purge busy TTM objects - use i915_sg_dma_sizes for all backends - demote GuC kernel contexts to normal priority - gvt: refactor for new MDEV interface - enable DC power states on eDP ports - fix gen 2/3 workarounds nouveau: - fix page fault handling - Ampere acceleration support - driver stability improvements - nva3 backlight support msm: - MSM_INFO_GET_FLAGS support - DPU: XR30 and P010 image formats - Qualcomm SM6115 support - DSI PHY support for QCM2290 - HDMI: refactored dev init path - remove exclusive-fence hack - fix speed-bin detection - enable clamp to idle on 7c3 - improved hangcheck detection vmwgfx: - fb and cursor refactoring - convert to generic hashtable - cursor improvements etnaviv: - hw workarounds - softpin MMU fixes ast: - atomic gamma LUT support - convert to SHMEM lcdif: - support YUV planes - Increase DMA burst size - FIFO threshold tuning meson: - fix return type of cvbs mode_valid mgag200: - fix PLL setup on some revisions sun4i: - A100 and D1 support udl: - modesetting improvements - hot unplug support vc4: - support PAL-M - fix regression preventing 4K @ 60Hz - fix NULL ptr deref v3d: - switch to drm managed resources renesas: - RZ/G2L DSI support - DU Kconfig cleanup mediatek: - fixup dpi and hdmi - MT8188 dpi support - MT8195 AFBC support tegra: - NVDEC hardware on Tegra234 SoC hdlcd: - switch to drm managed resources ingenic: - fix registration error path hisilicon: - convert to drm_mode_init maildp: - use managed resources mtk: - use drm_mode_init rockchip: - use drm_mode_copy" * tag 'drm-next-2022-12-13' of git://anongit.freedesktop.org/drm/drm: (1397 commits) drm/amdgpu: fix mmhub register base coding error drm/amdgpu: add tmz support for GC IP v11.0.4 drm/amdgpu: enable GFX Clock Gating control for GC IP v11.0.4 drm/amdgpu: enable GFX Power Gating for GC IP v11.0.4 drm/amdgpu: enable GFX IP v11.0.4 CG support drm/amdgpu: Make amdgpu_ring_mux functions as static drm/amdgpu: generally allow over-commit during BO allocation drm/amd/display: fix array index out of bound error in DCN32 DML drm/amd/display: 3.2.215 drm/amd/display: set optimized required for comp buf changes drm/amd/display: Add debug option to skip PSR CRTC disable drm/amd/display: correct DML calc error of UrgentLatency drm/amd/display: correct static_screen_event_mask drm/amd/display: Ensure commit_streams returns the DC return code drm/amd/display: read invalid ddc pin status cause engine busy drm/amd/display: Bypass DET swath fill check for max clocks drm/amd/display: Disable uclk pstate for subvp pipes drm/amd/display: Fix DCN2.1 default DSC clocks drm/amd/display: Enable dp_hdmi21_pcon support drm/amd/display: prevent seamless boot on displays that don't have the preferred dig ...
2022-12-13Merge tag 'media/v6.2-1' of ↵Linus Torvalds8-29/+552
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - DVB core changes to avoid refcount troubles and UAF - DVB API/core has gained support for DVB-C2 and DVB-S2X - New sensor drivers: ov08x40, ov4689.c, st-vgxy61 and tc358746.c - Removal of an unused sensor driver: s5k4ecgx - Move microchip_csi2dc to a new directory, named after the manufacturer - Add media controller support to Microship drivers - Old Atmel/Microship drivers that don't use media controler got moved to staging - New drivers added for Renesas RZ/G2L CRU and MIPI CSI-2 support - Allwinner A31 camera sensor driver code was now split into a bridge and a separate processor driver - Added a virtual stateless decoder driver in order to test core support for stateless drivers and test userspace apps using it - removed platform-based support for ov9650, as this is not used anymore - atomisp now uses videobuf2 and supports normal mmap mode - the imx7-media-csi driver got promoted from staging - rcar-vin driver has gained support for gen3 UDS (Up Down Scaler) - most i2c drivers now use I2C .probe_new() kAPI - lots of drivers fixes, cleanups and improvements * tag 'media/v6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (544 commits) media: s5c73m3: Switch to GPIO descriptors media: i2c: s5k5baf: switch to using gpiod API media: i2c: s5k6a3: switch to using gpiod API media: imx: remove code for non-existing config IMX_GPT_ICAP media: si470x: Fix use-after-free in si470x_int_in_callback() media: staging: stkwebcam: Restore MEDIA_{USB,CAMERA}_SUPPORT dependencies media: coda: Add check for kmalloc media: coda: Add check for dcoda_iram_alloc dt-bindings: media: s5c73m3: Fix reset-gpio descriptor media: dt-bindings: allwinner: h6-vpu-g2: Add IOMMU reference property media: s5k4ecgx: Delete driver media: s5k4ecgx: Switch to GPIO descriptors media: Switch to use dev_err_probe() helper headers: Remove some left-over license text in include/uapi/linux/v4l2-* headers: Remove some left-over license text in include/uapi/linux/dvb/ media: usb: pwc-uncompress: Use flex array destination for memcpy() media: s5p-mfc: Fix to handle reference queue during finishing media: s5p-mfc: Clear workbit to handle error condition media: s5p-mfc: Fix in register read and write for H264 media: imx: Use get_mbus_config instead of parsing upstream DT endpoints ...
2022-12-13Merge tag 'for-6.2/dm-changes' of ↵Linus Torvalds1-0/+8
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper updates from Mike Snitzer: - Fix use-after-free races due to missing resource cleanup during DM target destruction in DM targets: thin-pool, cache, integrity and clone. - Fix ABBA deadlocks in DM thin-pool and cache targets due to their use of a bufio client (that has a shrinker whose locking can cause the incorrect locking order). - Fix DM cache target to set its needs_check flag after first aborting the metadata (whereby using reset persistent-data objects to update the superblock with, otherwise the superblock update could be dropped due to aborting metadata). This was found with code-inspection when comparing with the equivalent in DM thinp code. - Fix DM thin-pool's presume to continue resuming the device even if the pool in is fail mode -- otherwise bios may never be failed up the IO stack (which will prevent resetting the thin-pool target via table reload) - Fix DM thin-pool's metadata to use proper btree root (from previous transaction) if metadata commit failed. - Add 'waitfor' module param to DM module (dm_mod) to allow dm-init to wait for the specified device before continuing with its DM target initialization. * tag 'for-6.2/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm thin: Use last transaction's pmd->root when commit failed dm init: add dm-mod.waitfor to wait for asynchronously probed block devices dm ioctl: fix a couple ioctl codes dm ioctl: a small code cleanup in list_version_get_info dm thin: resume even if in FAIL mode dm cache: set needs_check flag after aborting metadata dm cache: Fix ABBA deadlock between shrink_slab and dm_cache_metadata_abort dm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata dm integrity: Fix UAF in dm_integrity_dtr() dm cache: Fix UAF in destroy() dm clone: Fix UAF in clone_dtr() dm thin: Fix UAF in run_timer_softirq()
2022-12-13Merge tag 'mm-nonmm-stable-2022-12-12' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-MM updates from Andrew Morton: - A ptrace API cleanup series from Sergey Shtylyov - Fixes and cleanups for kexec from ye xingchen - nilfs2 updates from Ryusuke Konishi - squashfs feature work from Xiaoming Ni: permit configuration of the filesystem's compression concurrency from the mount command line - A series from Akinobu Mita which addresses bound checking errors when writing to debugfs files - A series from Yang Yingliang to address rapidio memory leaks - A series from Zheng Yejian to address possible overflow errors in encode_comp_t() - And a whole shower of singleton patches all over the place * tag 'mm-nonmm-stable-2022-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (79 commits) ipc: fix memory leak in init_mqueue_fs() hfsplus: fix bug causing custom uid and gid being unable to be assigned with mount rapidio: devices: fix missing put_device in mport_cdev_open kcov: fix spelling typos in comments hfs: Fix OOB Write in hfs_asc2mac hfs: fix OOB Read in __hfs_brec_find relay: fix type mismatch when allocating memory in relay_create_buf() ocfs2: always read both high and low parts of dinode link count io-mapping: move some code within the include guarded section kernel: kcsan: kcsan_test: build without structleak plugin mailmap: update email for Iskren Chernev eventfd: change int to __u64 in eventfd_signal() ifndef CONFIG_EVENTFD rapidio: fix possible UAF when kfifo_alloc() fails relay: use strscpy() is more robust and safer cpumask: limit visibility of FORCE_NR_CPUS acct: fix potential integer overflow in encode_comp_t() acct: fix accuracy loss for input value of encode_comp_t() linux/init.h: include <linux/build_bug.h> and <linux/stringify.h> rapidio: rio: fix possible name leak in rio_register_mport() rapidio: fix possible name leaks when rio_add_device() fails ...
2022-12-13Merge tag 'docs-6.2' of git://git.lwn.net/linuxLinus Torvalds5-156/+102
Pull documentation updates from Jonathan Corbet: "This was a not-too-busy cycle for documentation; highlights include: - The beginnings of a set of translations into Spanish, headed up by Carlos Bilbao - More Chinese translations - A change to the Sphinx "alabaster" theme by default for HTML generation. Unlike the previous default (Read the Docs), alabaster is shipped with Sphinx by default, reducing the number of other dependencies that need to be installed. It also (IMO) produces a cleaner and more readable result. - The ability to render the documentation into the texinfo format (something Sphinx could always do, we just never wired it up until now) Plus the usual collection of typo fixes, build-warning fixes, and minor updates" * tag 'docs-6.2' of git://git.lwn.net/linux: (67 commits) Documentation/features: Use loongarch instead of loong Documentation/features-refresh.sh: Only sed the beginning "arch" of ARCH_DIR docs/zh_CN: Fix '.. only::' directive's expression docs/sp_SP: Add memory-barriers.txt Spanish translation docs/zh_CN/LoongArch: Update links of LoongArch ISA Vol1 and ELF psABI docs/LoongArch: Update links of LoongArch ISA Vol1 and ELF psABI Documentation/features: Update feature lists for 6.1 Documentation: Fixed a typo in bootconfig.rst docs/sp_SP: Add process coding-style translation docs/sp_SP: Add kernel-docs.rst Spanish translation docs: Create translations/sp_SP/process/, move submitting-patches.rst docs: Add book to process/kernel-docs.rst docs: Retire old resources from kernel-docs.rst docs: Update maintainer of kernel-docs.rst Documentation: riscv: Document the sv57 VM layout Documentation: USB: correct possessive "its" usage math64: fix kernel-doc return value warnings math64: add kernel-doc for DIV64_U64_ROUND_UP math64: favor kernel-doc from header files doc: add texinfodocs and infodocs targets ...
2022-12-13Merge tag 'linux-kselftest-next-6.2-rc1' of ↵Linus Torvalds1-20/+174
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull Kselftest updates from Shuah Khan: "Several fixes and enhancements to existing tests and a few new tests: - add new amd-pstate tests and fix and enhance existing ones - add new watchdog tests and enhance existing ones to improve coverage - fixes to ftrace, splice_read, rtc, and efivars tests - fixes to handle egrep obsolescence in the latest grep release - miscellaneous spelling and SPDX fixes" * tag 'linux-kselftest-next-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (24 commits) selftests/ftrace: Use long for synthetic event probe test selftests/tpm2: Split async tests call to separate shell script runner selftests: splice_read: Fix sysfs read cases selftests: ftrace: Use "grep -E" instead of "egrep" selftests: gpio: Use "grep -E" instead of "egrep" selftests: kselftest_deps: Use "grep -E" instead of "egrep" selftests/efivarfs: Add checking of the test return value cpufreq: amd-pstate: fix spdxcheck warnings for amd-pstate-ut.c selftests: rtc: skip when RTC is not present selftests/ftrace: event_triggers: wait longer for test_event_enable selftests/vDSO: Add riscv getcpu & gettimeofday test Documentation: amd-pstate: Add tbench and gitsource test introduction selftests: amd-pstate: Trigger gitsource benchmark and test cpus selftests: amd-pstate: Trigger tbench benchmark and test cpus selftests: amd-pstate: Split basic.sh into run.sh and basic.sh. selftests: amd-pstate: Rename amd-pstate-ut.sh to basic.sh. selftests/ftrace: Convert tracer tests to use 'requires' to specify program dependency selftests/ftrace: Add check for ping command for trigger tests selftests/watchdog: Fix spelling mistake "Temeprature" -> "Temperature" selftests/watchdog: add test for WDIOC_GETTEMP ...
2022-12-13Merge tag 'random-6.2-rc1-for-linus' of ↵Linus Torvalds1-11/+9
git://git.kernel.org/pub/scm/linux/kernel/git/crng/random Pull random number generator updates from Jason Donenfeld: - Replace prandom_u32_max() and various open-coded variants of it, there is now a new family of functions that uses fast rejection sampling to choose properly uniformly random numbers within an interval: get_random_u32_below(ceil) - [0, ceil) get_random_u32_above(floor) - (floor, U32_MAX] get_random_u32_inclusive(floor, ceil) - [floor, ceil] Coccinelle was used to convert all current users of prandom_u32_max(), as well as many open-coded patterns, resulting in improvements throughout the tree. I'll have a "late" 6.1-rc1 pull for you that removes the now unused prandom_u32_max() function, just in case any other trees add a new use case of it that needs to converted. According to linux-next, there may be two trivial cases of prandom_u32_max() reintroductions that are fixable with a 's/.../.../'. So I'll have for you a final conversion patch doing that alongside the removal patch during the second week. This is a treewide change that touches many files throughout. - More consistent use of get_random_canary(). - Updates to comments, documentation, tests, headers, and simplification in configuration. - The arch_get_random*_early() abstraction was only used by arm64 and wasn't entirely useful, so this has been replaced by code that works in all relevant contexts. - The kernel will use and manage random seeds in non-volatile EFI variables, refreshing a variable with a fresh seed when the RNG is initialized. The RNG GUID namespace is then hidden from efivarfs to prevent accidental leakage. These changes are split into random.c infrastructure code used in the EFI subsystem, in this pull request, and related support inside of EFISTUB, in Ard's EFI tree. These are co-dependent for full functionality, but the order of merging doesn't matter. - Part of the infrastructure added for the EFI support is also used for an improvement to the way vsprintf initializes its siphash key, replacing an sleep loop wart. - The hardware RNG framework now always calls its correct random.c input function, add_hwgenerator_randomness(), rather than sometimes going through helpers better suited for other cases. - The add_latent_entropy() function has long been called from the fork handler, but is a no-op when the latent entropy gcc plugin isn't used, which is fine for the purposes of latent entropy. But it was missing out on the cycle counter that was also being mixed in beside the latent entropy variable. So now, if the latent entropy gcc plugin isn't enabled, add_latent_entropy() will expand to a call to add_device_randomness(NULL, 0), which adds a cycle counter, without the absent latent entropy variable. - The RNG is now reseeded from a delayed worker, rather than on demand when used. Always running from a worker allows it to make use of the CPU RNG on platforms like S390x, whose instructions are too slow to do so from interrupts. It also has the effect of adding in new inputs more frequently with more regularity, amounting to a long term transcript of random values. Plus, it helps a bit with the upcoming vDSO implementation (which isn't yet ready for 6.2). - The jitter entropy algorithm now tries to execute on many different CPUs, round-robining, in hopes of hitting even more memory latencies and other unpredictable effects. It also will mix in a cycle counter when the entropy timer fires, in addition to being mixed in from the main loop, to account more explicitly for fluctuations in that timer firing. And the state it touches is now kept within the same cache line, so that it's assured that the different execution contexts will cause latencies. * tag 'random-6.2-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random: (23 commits) random: include <linux/once.h> in the right header random: align entropy_timer_state to cache line random: mix in cycle counter when jitter timer fires random: spread out jitter callback to different CPUs random: remove extraneous period and add a missing one in comments efi: random: refresh non-volatile random seed when RNG is initialized vsprintf: initialize siphash key using notifier random: add back async readiness notifier random: reseed in delayed work rather than on-demand random: always mix cycle counter in add_latent_entropy() hw_random: use add_hwgenerator_randomness() for early entropy random: modernize documentation comment on get_random_bytes() random: adjust comment to account for removed function random: remove early archrandom abstraction random: use random.trust_{bootloader,cpu} command line option only stackprotector: actually use get_random_canary() stackprotector: move get_random_canary() into stackprotector.h treewide: use get_random_u32_inclusive() when possible treewide: use get_random_u32_{above,below}() instead of manual loop treewide: use get_random_u32_below() instead of deprecated function ...
2022-12-13Merge tag 'x86_splitlock_for_6.2' of ↵Linus Torvalds1-0/+23
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 splitlock updates from Dave Hansen: "Add a sysctl to control the split lock misery mode. This enables users to reduce the penalty inflicted on split lock users. There are some proprietary, binary-only games which became entirely unplayable with the old penalty. Anyone opting into the new mode is, of course, more exposed to the DoS nasitness inherent with split locks, but they can play their games again" * tag 'x86_splitlock_for_6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/split_lock: Add sysctl to control the misery mode
2022-12-12Merge tag 's390-6.2-1' of ↵Linus Torvalds1-0/+11
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Alexander Gordeev: - Factor out handle_write() function and simplify 3215 console write operation - When 3170 terminal emulator is connected to the 3215 console driver the boot time could be very long due to limited buffer space or missing operator input. Add con3215_drop command line parameter and con3215_drop sysfs attribute file to instruct the kernel drop console data when such conditions are met - Fix white space errors in 3215 console driver - Move enum paiext_mode definition to a header file and rename it to paievt_mode to indicate this is now used for several events. Rename PAI_MODE_COUNTER to PAI_MODE_COUNTING to make consistent with PAI_MODE_SAMPLING - Simplify the logic of PMU pai_crypto mapped buffer reference counter and make it consistent with PMU pai_ext - Rename PMU pai_crypto mapped buffer structure member users to active_events to make it consistent with PMU pai_ext - Enable HUGETLB_PAGE_OPTIMIZE_VMEMMAP configuration option. This results in saving of 12K per 1M hugetlb page (~1.2%) and 32764K per 2G hugetlb page (~1.6%) - Use generic serial.h, bugs.h, shmparam.h and vga.h header files and scrap s390-specific versions - The generic percpu setup code does not expect the s390-like implementation and emits a warning. To get rid of that warning and provide sane CPU-to-node and CPU-to-CPU distance mappings implementat a minimal version of setup_per_cpu_areas() - Use kstrtobool() instead of strtobool() for re-IPL sysfs device attributes - Avoid unnecessary lookup of a pointer to MSI descriptor when setting IRQ affinity for a PCI device - Get rid of "an incompatible function type cast" warning by changing debug_sprintf_format_fn() function prototype so it matches the debug_format_proc_t function type - Remove unused info_blk_hdr__pcpus() and get_page_state() functions - Get rid of clang "unused unused insn cache ops function" warning by moving s390_insn definition to a private header - Get rid of clang "unused function" warning by making function raw3270_state_final() only available if CONFIG_TN3270_CONSOLE is enabled - Use kstrobool() to parse sclp_con_drop parameter to make it identical to the con3215_drop parameter and allow passing values like "yes" and "true" - Use sysfs_emit() for all SCLP sysfs show functions, which is the current standard way to generate output strings - Make SCLP con_drop sysfs attribute also writable and allow to change its value during runtime. This makes SCLP console drop handling consistent with the 3215 device driver - Virtual and physical addresses are indentical on s390. However, there is still a confusion when pointers are directly casted to physical addresses or vice versa. Use correct address converters virt_to_phys() and phys_to_virt() for s390 channel IO drivers - Support for power managemant has been removed from s390 since quite some time. Remove unused power managemant code from the appldata device driver - Allow memory tools like KASAN see memory accesses from the checksum code. Switch to GENERIC_CSUM if KASAN is enabled, just like x86 does - Add support of ECKD DASDs disks so it could be used as boot and dump devices - Follow checkpatch recommendations and use octal values instead of S_IRUGO and S_IWUSR for dump device attributes in sysfs - Changes to vx-insn.h do not cause a recompile of C files that use asm(".include \"asm/vx-insn.h\"\n") magic to access vector instruction macros from inline assemblies. Add wrapper include header file to avoid this problem - Use vector instruction macros instead of byte patterns to increase register validation routine readability - The current machine check register validation handling does not take into account various scenarios and might lead to killing a wrong user process or potentially ignore corrupted FPU registers. Simplify logic of the machine check handler and stop the whole machine if the previous context was kerenel mode. If the previous context was user mode, kill the current task - Introduce sclp_emergency_printk() function which can be used to emit a message in emergency cases. It is supposed to be used in cases where regular console device drivers may not work anymore, e.g. unrecoverable machine checks Keep the early Service-Call Control Block so it can also be used after initdata has been freed to allow sclp_emergency_printk() implementation - In case a system will be stopped because of an unrecoverable machine check error print the machine check interruption code to give a hint of what went wrong - Move storage error checking from the assembly entry code to C in order to simplify machine check handling. Enter the handler with DAT turned on, which simplifies the entry code even more - The machine check extended save areas are allocated using a private "nmi_save_areas" slab cache which guarantees a required power-of-two alignment. Get rid of that cache in favour of kmalloc() * tag 's390-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (38 commits) s390/nmi: get rid of private slab cache s390/nmi: move storage error checking back to C, enter with DAT on s390/nmi: print machine check interruption code before stopping system s390/sclp: introduce sclp_emergency_printk() s390/sclp: keep sclp_early_sccb s390/nmi: rework register validation handling s390/nmi: use vector instruction macros instead of byte patterns s390/vx: add vx-insn.h wrapper include file s390/ipl: use octal values instead of S_* macros s390/ipl: add eckd dump support s390/ipl: add eckd support vfio/ccw: identify CCW data addresses as physical vfio/ccw: sort out physical vs virtual pointers usage s390/checksum: support GENERIC_CSUM, enable it for KASAN s390/appldata: remove power management callbacks s390/cio: sort out physical vs virtual pointers usage s390/sclp: allow to change sclp_console_drop during runtime s390/sclp: convert to use sysfs_emit() s390/sclp: use kstrobool() to parse sclp_con_drop parameter s390/3270: make raw3270_state_final() depend on CONFIG_TN3270_CONSOLE ...
2022-12-12Merge tag 'arm64-upstream' of ↵Linus Torvalds5-53/+445
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Will Deacon: "The highlights this time are support for dynamically enabling and disabling Clang's Shadow Call Stack at boot and a long-awaited optimisation to the way in which we handle the SVE register state on system call entry to avoid taking unnecessary traps from userspace. Summary: ACPI: - Enable FPDT support for boot-time profiling - Fix CPU PMU probing to work better with PREEMPT_RT - Update SMMUv3 MSI DeviceID parsing to latest IORT spec - APMT support for probing Arm CoreSight PMU devices CPU features: - Advertise new SVE instructions (v2.1) - Advertise range prefetch instruction - Advertise CSSC ("Common Short Sequence Compression") scalar instructions, adding things like min, max, abs, popcount - Enable DIT (Data Independent Timing) when running in the kernel - More conversion of system register fields over to the generated header CPU misfeatures: - Workaround for Cortex-A715 erratum #2645198 Dynamic SCS: - Support for dynamic shadow call stacks to allow switching at runtime between Clang's SCS implementation and the CPU's pointer authentication feature when it is supported (complete with scary DWARF parser!) Tracing and debug: - Remove static ftrace in favour of, err, dynamic ftrace! - Seperate 'struct ftrace_regs' from 'struct pt_regs' in core ftrace and existing arch code - Introduce and implement FTRACE_WITH_ARGS on arm64 to replace the old FTRACE_WITH_REGS - Extend 'crashkernel=' parameter with default value and fallback to placement above 4G physical if initial (low) allocation fails SVE: - Optimisation to avoid disabling SVE unconditionally on syscall entry and just zeroing the non-shared state on return instead Exceptions: - Rework of undefined instruction handling to avoid serialisation on global lock (this includes emulation of user accesses to the ID registers) Perf and PMU: - Support for TLP filters in Hisilicon's PCIe PMU device - Support for the DDR PMU present in Amlogic Meson G12 SoCs - Support for the terribly-named "CoreSight PMU" architecture from Arm (and Nvidia's implementation of said architecture) Misc: - Tighten up our boot protocol for systems with memory above 52 bits physical - Const-ify static keys to satisty jump label asm constraints - Trivial FFA driver cleanups in preparation for v1.1 support - Export the kernel_neon_* APIs as GPL symbols - Harden our instruction generation routines against instrumentation - A bunch of robustness improvements to our arch-specific selftests - Minor cleanups and fixes all over (kbuild, kprobes, kfence, PMU, ...)" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (151 commits) arm64: kprobes: Return DBG_HOOK_ERROR if kprobes can not handle a BRK arm64: kprobes: Let arch do_page_fault() fix up page fault in user handler arm64: Prohibit instrumentation on arch_stack_walk() arm64:uprobe fix the uprobe SWBP_INSN in big-endian arm64: alternatives: add __init/__initconst to some functions/variables arm_pmu: Drop redundant armpmu->map_event() in armpmu_event_init() kselftest/arm64: Allow epoll_wait() to return more than one result kselftest/arm64: Don't drain output while spawning children kselftest/arm64: Hold fp-stress children until they're all spawned arm64/sysreg: Remove duplicate definitions from asm/sysreg.h arm64/sysreg: Convert ID_DFR1_EL1 to automatic generation arm64/sysreg: Convert ID_DFR0_EL1 to automatic generation arm64/sysreg: Convert ID_AFR0_EL1 to automatic generation arm64/sysreg: Convert ID_MMFR5_EL1 to automatic generation arm64/sysreg: Convert MVFR2_EL1 to automatic generation arm64/sysreg: Convert MVFR1_EL1 to automatic generation arm64/sysreg: Convert MVFR0_EL1 to automatic generation arm64/sysreg: Convert ID_PFR2_EL1 to automatic generation arm64/sysreg: Convert ID_PFR1_EL1 to automatic generation arm64/sysreg: Convert ID_PFR0_EL1 to automatic generation ...
2022-12-06Merge branch 'for-next/perf' into for-next/coreWill Deacon4-44/+439
* for-next/perf: (21 commits) arm_pmu: Drop redundant armpmu->map_event() in armpmu_event_init() drivers/perf: hisi: Add TLP filter support Documentation: perf: Indent filter options list of hisi-pcie-pmu docs: perf: Fix PMU instance name of hisi-pcie-pmu drivers/perf: hisi: Fix some event id for hisi-pcie-pmu arm64/perf: Replace PMU version number '0' with ID_AA64DFR0_EL1_PMUVer_NI perf/amlogic: Remove unused header inclusions of <linux/version.h> perf/amlogic: Fix build error for x86_64 allmodconfig dt-binding: perf: Add Amlogic DDR PMU docs/perf: Add documentation for the Amlogic G12 DDR PMU perf/amlogic: Add support for Amlogic meson G12 SoC DDR PMU driver MAINTAINERS: Update HiSilicon PMU maintainers perf: arm_cspmu: Fix module cyclic dependency perf: arm_cspmu: Fix build failure on x86_64 perf: arm_cspmu: Fix modular builds due to missing MODULE_LICENSE()s perf: arm_cspmu: Add support for NVIDIA SCF and MCF attribute perf: arm_cspmu: Add support for ARM CoreSight PMU driver perf/smmuv3: Fix hotplug callback leak in arm_smmu_pmu_init() perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init() drivers: perf: marvell_cn10k: Fix hotplug callback leak in tad_pmu_init() ...
2022-12-03Documentation: Fixed a typo in bootconfig.rstKushagra Verma1-1/+1
Fixed a typo in the word 'concatenated'. Signed-off-by: Kushagra Verma <kushagra765@outlook.com> Link: https://lore.kernel.org/r/HK0PR01MB2801DA243B726141A97FE92EF8179@HK0PR01MB2801.apcprd01.prod.exchangelabs.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-12-03dm init: add dm-mod.waitfor to wait for asynchronously probed block devicesPeter Korsgaard1-0/+8
Just calling wait_for_device_probe() is not enough to ensure that asynchronously probed block devices are available (E.G. mmc, usb), so add a "dm-mod.waitfor=<device1>[,..,<deviceN>]" parameter to get dm-init to explicitly wait for specific block devices before initializing the tables with logic similar to the rootwait logic that was introduced with commit cc1ed7542c8c ("init: wait for asynchronously scanned block devices"). E.G. with dm-verity on mmc using: dm-mod.waitfor="PARTLABEL=hash-a,PARTLABEL=root-a" [ 0.671671] device-mapper: init: waiting for all devices to be available before creating mapped devices [ 0.671679] device-mapper: init: waiting for device PARTLABEL=hash-a ... [ 0.710695] mmc0: new HS200 MMC card at address 0001 [ 0.711158] mmcblk0: mmc0:0001 004GA0 3.69 GiB [ 0.715954] mmcblk0boot0: mmc0:0001 004GA0 partition 1 2.00 MiB [ 0.722085] mmcblk0boot1: mmc0:0001 004GA0 partition 2 2.00 MiB [ 0.728093] mmcblk0rpmb: mmc0:0001 004GA0 partition 3 512 KiB, chardev (249:0) [ 0.738274] mmcblk0: p1 p2 p3 p4 p5 p6 p7 [ 0.751282] device-mapper: init: waiting for device PARTLABEL=root-a ... [ 0.751306] device-mapper: init: all devices available [ 0.751683] device-mapper: verity: sha256 using implementation "sha256-generic" [ 0.759344] device-mapper: ioctl: dm-0 (vroot) is ready [ 0.766540] VFS: Mounted root (squashfs filesystem) readonly on device 254:0. Signed-off-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2022-11-30Merge tag 'drm-accel-2022-11-22' of ↵Dave Airlie1-0/+5
https://git.kernel.org/pub/scm/linux/kernel/git/ogabbay/accel into drm-next This tag contains the patches that add the new compute acceleration subsystem, which is part of the DRM subsystem. The patches: - Add a new directory at drivers/accel. - Add a new major (261) for compute accelerators. - Add a new DRM minor type for compute accelerators. - Integrate the accel core code with DRM core code. - Add documentation for the accel subsystem. Signed-off-by: Dave Airlie <airlied@redhat.com> some acks from the list (some are in the patch series): Acked-by: Daniel Stone <daniels@collabora.com> Acked-by: Sonal Santan <sonal.santan@amd.com> Acked-by: Maxime Ripard <maxime@cerno.tech> Acked-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> Tested-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> From: Oded Gabbay <ogabbay@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20221122112222.GA352082@ogabbay-vm-u20.habana-labs.com
2022-11-29drivers/perf: hisi: Add TLP filter supportYicong Yang1-0/+18
The PMU support to filter the TLP when counting the bandwidth with below options: - only count the TLP headers - only count the TLP payloads - count both TLP headers and payloads In the current driver it's default to count the TLP payloads only, which will have an implicity side effects that on the traffic only have header only TLPs, we'll get no data. Make this user configuration through "len_mode" parameter and make it default to count both TLP headers and payloads when user not specified. Also update the documentation for it. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/20221117084136.53572-5-yangyicong@huawei.com Signed-off-by: Will Deacon <will@kernel.org>
2022-11-29Documentation: perf: Indent filter options list of hisi-pcie-pmuBagas Sanjaya1-37/+43
The "Filter options" list have a rather ugly indentation. Also, the first paragraph after list name is rendered without separator (as continuation from the name). Align the list by indenting the list items and add a blank line separator for each list name. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/20221117084136.53572-4-yangyicong@huawei.com Signed-off-by: Will Deacon <will@kernel.org>
2022-11-29docs: perf: Fix PMU instance name of hisi-pcie-pmuYicong Yang1-11/+11
The PMU instance will be called hisi_pcie<sicl>_core<core> rather than hisi_pcie<sicl>_<core>. Fix this in the documentation. Fixes: c8602008e247 ("docs: perf: Add description for HiSilicon PCIe PMU driver") Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/20221117084136.53572-3-yangyicong@huawei.com Signed-off-by: Will Deacon <will@kernel.org>
2022-11-25media: vivid.rst: fix TV and S-Video Inputs sectionDeming Wang1-1/+1
remove the double word 'in'. Signed-off-by: Deming Wang <wangdeming@inspur.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2022-11-25media: admin-guide: cec.rstHans Verkuil4-24/+371
Document administration details about CEC devices. This was formerly documented in a cec-status.txt I kept on my website, but this really belongs here as an admin guide. Updated the original cec-status.txt, and converted it to .rst. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2022-11-25media: visl: add virtual stateless decoder driverDaniel Almeida2-0/+176
A virtual stateless device for stateless uAPI development purposes. This tool's objective is to help the development and testing of userspace applications that use the V4L2 stateless API to decode media. A userspace implementation can use visl to run a decoding loop even when no hardware is available or when the kernel uAPI for the codec has not been upstreamed yet. This can reveal bugs at an early stage. This driver can also trace the contents of the V4L2 controls submitted to it. It can also dump the contents of the vb2 buffers through a debugfs interface. This is in many ways similar to the tracing infrastructure available for other popular encode/decode APIs out there and can help develop a userspace application by using another (working) one as a reference. Note that no actual decoding of video frames is performed by visl. The V4L2 test pattern generator is used to write various debug information to the capture buffers instead. Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2022-11-24Backmerge tag 'v6.1-rc6' into drm-nextDave Airlie1-1/+1
Linux 6.1-rc6 This is needed for drm-misc-next and tegra. Signed-off-by: Dave Airlie <airlied@redhat.com>
2022-11-22Documentation: add amd-pstate kernel command line optionsPerry Yuan1-0/+11
Add a new amd pstate driver command line option to enable driver passive working mode via MSR and shared memory interface to request desired performance within abstract scale and the power management firmware (SMU) convert the perf requests into actual hardware pstates. Also the `disable` parameter can disable the pstate driver loading by adding `amd_pstate=disable` to kernel command line. Acked-by: Huang Rui <ray.huang@amd.com> Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com> Tested-by: Wyes Karny <wyes.karny@amd.com> Signed-off-by: Perry Yuan <Perry.Yuan@amd.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-11-22Documentation: amd-pstate: add driver working mode introductionPerry Yuan1-17/+13
Introduce the `amd_pstate` driver new working mode with `amd_pstate=passive` added to kernel command line. If there is no passive mode enabled by user, amd_pstate driver will be disabled by default for now. Acked-by: Huang Rui <ray.huang@amd.com> Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com> Tested-by: Wyes Karny <wyes.karny@amd.com> Signed-off-by: Perry Yuan <Perry.Yuan@amd.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-11-22drivers/accel: define kconfig and register a new majorOded Gabbay1-0/+5
Add a new Kconfig for the accel subsystem. The Kconfig currently contains only the basic CONFIG_DRM_ACCEL option that will be used to decide whether to compile the accel registration code. Therefore, the kconfig option is defined as bool. The accel code will be compiled as part of drm.ko and will be called directly from the DRM core code. The reason we compile it as part of drm.ko and not as a separate module is because of cyclic dependency between drm.ko and the separate module (if it would have existed). This is due to the fact that DRM core code calls accel functions and vice-versa. The accelerator devices will be exposed to the user space with a new, dedicated major number - 261. The accel init function registers the new major number as a char device and create corresponding sysfs and debugfs root entries, similar to what is done in DRM init function. I added a new header called drm_accel.h to include/drm/, that will hold the prototypes of the drm_accel.c functions. In case CONFIG_DRM_ACCEL is set to 'N', that header will contain empty inline implementations of those functions, to allow DRM core code to compile successfully without dependency on CONFIG_DRM_ACCEL. I Updated the MAINTAINERS file accordingly with the newly added folder and I have taken the liberty to appropriate the dri-devel mailing list and the dri-devel IRC channel for the accel subsystem. Signed-off-by: Oded Gabbay <ogabbay@kernel.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Dave Airlie <airlied@redhat.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> Tested-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> Reviewed-by: Melissa Wen <mwen@igalia.com>
2022-11-21docs/perf: Add documentation for the Amlogic G12 DDR PMUJiucheng Xu2-0/+71
Add a user guide to show how to use DDR PMU to monitor DDR bandwidth on Amlogic G12 SoC Signed-off-by: Jiucheng Xu <jiucheng.xu@amlogic.com> Reviewed-by: Chris Healy <healych@amazon.com> Link: https://lore.kernel.org/r/20221121021602.3306998-2-jiucheng.xu@amlogic.com Signed-off-by: Will Deacon <will@kernel.org>
2022-11-19core_pattern: add CPU specifierOleksandr Natalenko1-0/+1
Statistically, in a large deployment regular segfaults may indicate a CPU issue. Currently, it is not possible to find out what CPU the segfault happened on. There are at least two attempts to improve segfault logging with this regard, but they do not help in case the logs rotate. Hence, lets make sure it is possible to permanently record a CPU the task ran on using a new core_pattern specifier. Link: https://lkml.kernel.org/r/20220903064330.20772-1-oleksandr@redhat.com Signed-off-by: Oleksandr Natalenko <oleksandr@redhat.com> Suggested-by: Renaud Métrich <rmetrich@redhat.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: "Eric W . Biederman" <ebiederm@xmission.com> Cc: Grzegorz Halat <ghalat@redhat.com> Cc: "Guilherme G. Piccoli" <gpiccoli@igalia.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Jason A. Donenfeld <Jason@zx2c4.com> Cc: Joel Savitz <jsavitz@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kees Cook <keescook@chromium.org> Cc: Laurent Dufour <ldufour@linux.ibm.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: Stephen Kitt <steve@sk2.org> Cc: Will Deacon <will@kernel.org> Cc: Xiaoming Ni <nixiaoming@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-11-18arm64: kdump: Support crashkernel=X fall back to reserve region above DMA zonesZhen Lei1-1/+1
For crashkernel=X without '@offset', select a region within DMA zones first, and fall back to reserve region above DMA zones. This allows users to use the same configuration on multiple platforms. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Acked-by: Baoquan He <bhe@redhat.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20221116121044.1690-3-thunder.leizhen@huawei.com Signed-off-by: Will Deacon <will@kernel.org>
2022-11-18arm64: kdump: Provide default size when crashkernel=Y,low is not specifiedZhen Lei1-8/+5
Try to allocate at least 128 MiB low memory automatically for the case that crashkernel=,high is explicitly specified, while crashkenrel=,low is omitted. This allows users to focus more on the high memory requirements of their business rather than the low memory requirements of the crash kernel booting. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Acked-by: Baoquan He <bhe@redhat.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20221116121044.1690-2-thunder.leizhen@huawei.com Signed-off-by: Will Deacon <will@kernel.org>
2022-11-18random: use random.trust_{bootloader,cpu} command line option onlyJason A. Donenfeld1-11/+9
It's very unusual to have both a command line option and a compile time option, and apparently that's confusing to people. Also, basically everybody enables the compile time option now, which means people who want to disable this wind up having to use the command line option to ensure that anyway. So just reduce the number of moving pieces and nix the compile time option in favor of the more versatile command line option. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2022-11-16drm: Move nomodeset kernel parameter to drivers/videoThomas Zimmermann1-6/+9
Move the nomodeset kernel parameter to drivers/video to make it available to non-DRM drivers. Adapt the interface, but keep the DRM interface drm_firmware_drivers_only() to avoid churn within DRM. The function should later be inlined into callers. The parameter disables any DRM graphics driver that would replace a driver for firmware-provided scanout buffers. It is an option to easily fallback to basic graphics output if the hardware's native driver is broken. Moving it to a more prominent location wil make it available to fbdev as well. v2: * clarify the meaning of the nomodeset parameter (Javier) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221111133024.9897-2-tzimmermann@suse.de
2022-11-15perf: arm_cspmu: Add support for NVIDIA SCF and MCF attributeBesar Wicaksono2-0/+300
Add support for NVIDIA System Cache Fabric (SCF) and Memory Control Fabric (MCF) PMU attributes for CoreSight PMU implementation in NVIDIA devices. Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com> Link: https://lore.kernel.org/r/20221111222330.48602-3-bwicaksono@nvidia.com Signed-off-by: Will Deacon <will@kernel.org>
2022-11-10x86/split_lock: Add sysctl to control the misery modeGuilherme G. Piccoli1-0/+23
Commit b041b525dab9 ("x86/split_lock: Make life miserable for split lockers") changed the way the split lock detector works when in "warn" mode; basically, it not only shows the warn message, but also intentionally introduces a slowdown through sleeping plus serialization mechanism on such task. Based on discussions in [0], seems the warning alone wasn't enough motivation for userspace developers to fix their applications. This slowdown is enough to totally break some proprietary (aka. unfixable) userspace[1]. Happens that originally the proposal in [0] was to add a new mode which would warns + slowdown the "split locking" task, keeping the old warn mode untouched. In the end, that idea was discarded and the regular/default "warn" mode now slows down the applications. This is quite aggressive with regards proprietary/legacy programs that basically are unable to properly run in kernel with this change. While it is understandable that a malicious application could DoS by split locking, it seems unacceptable to regress old/proprietary userspace programs through a default configuration that previously worked. An example of such breakage was reported in [1]. Add a sysctl to allow controlling the "misery mode" behavior, as per Thomas suggestion on [2]. This way, users running legacy and/or proprietary software are allowed to still execute them with a decent performance while still observing the warning messages on kernel log. [0] https://lore.kernel.org/lkml/20220217012721.9694-1-tony.luck@intel.com/ [1] https://github.com/doitsujin/dxvk/issues/2938 [2] https://lore.kernel.org/lkml/87pmf4bter.ffs@tglx/ [ dhansen: minor changelog tweaks, including clarifying the actual problem ] Fixes: b041b525dab9 ("x86/split_lock: Make life miserable for split lockers") Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Tested-by: Andre Almeida <andrealmeid@igalia.com> Link: https://lore.kernel.org/all/20221024200254.635256-1-gpiccoli%40igalia.com
2022-11-10docs: admin-guide: hw_random: Make document title more generic and conciseJonathan Neuschäfer1-3/+3
The hw_random subsystem no longer works only on specific Intel chipsets; make the title of hw_random.rst reflect this fact. While we're at it, also remove the words "Linux support for", since it's clear from context that this is a document about Linux. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Link: https://lore.kernel.org/r/20221101160119.955997-1-j.neuschaefer@gmx.net Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-11-09Docs/admin-guide/mm/zswap: remove a paragraph about zswap being a new featureDavid Heidelberg1-7/+1
Nine years have passed since Linux 3.11. Signed-off-by: David Heidelberg <david@ixit.cz> Link: https://lore.kernel.org/r/20221104122612.14906-1-david@ixit.cz Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-11-08media: vimc: Update device configuration in the documentationDafna Hirschfeld1-4/+4
Current configuration in the document is outdated and doesn't work. Update it to match the configuration described in the following commit: commit 9b4a9b31b9ae ("media: vimc: Enable set resolution at the scaler src pad") Fixed commit description: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Dafna Hirschfeld <dafna@fastmail.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2022-11-01Documentation: amd-pstate: Add tbench and gitsource test introductionMeng Li1-20/+174
Introduce tbench and gitsource test cases design and implementation. Monitor cpus changes about performance and power consumption etc. Signed-off-by: Meng Li <li.meng@amd.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2022-10-26s390/con3215: Drop console data printout when buffer fullThomas Richter1-0/+11
Using z/VM the 3270 terminal emulator also emulates an IBM 3215 console which outputs line by line. When the screen is full, the console enters the MORE... state and waits for the operator to confirm the data on the screen by pressing a clear key. If this does not happen in the default time frame (currently 50 seconds) the console enters the HOLDING state. It then waits another time frame (currently 10 seconds) before the output continues on the next screen. When the operator presses the clear key during these wait times, the output continues immediately. This may lead to a very long boot time when the console has to print many messages, also the system may hang because of the console's limited buffer space and the system waits for the console output to drain and finally to finish. This problem can only occur when a terminal emulator is actually connected to the 3215 console driver. If not z/VM simply drops console output. Remedy this rare situation and add a kernel boot command line parameter con3215_drop. It can be set to 0 (do not drop) or 1 (do drop) which is the default. This instructs the kernel drop console data when the console buffer is full. This speeds up the boot time considerable and also does not hang the system anymore. Add a sysfs attribute file for console IBM 3215 named con_drop. This allows for changing the behavior after the boot, for example when during interactive debugging a panic/crash is expected. Here is a test of the new behavior using the following test program: #/bin/bash declare -i cnt=4 mode=$(cat /sys/bus/ccw/drivers/3215/con_drop) [ $mode = yes ] && cnt=25 echo "cons_drop $(cat /sys/bus/ccw/drivers/3215/con_drop)" echo "vmcp term more 5 2" vmcp term more 5 2 echo "Run $cnt iterations of "'echo t > /proc/sysrq-trigger' for i in $(seq $cnt) do echo "$i. command 'echo t > /proc/sysrq-trigger' at $(date +%F,%T)" echo t > /proc/sysrq-trigger sleep 1 done echo "droptest done" > /dev/kmsg # Output with sysfs attribute con_drop set to 1: # ./droptest.sh cons_drop yes vmcp term more 5 2 Run 25 iterations of echo t > /proc/sysrq-trigger 1. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:09 2. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:10 3. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:11 4. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:12 5. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:13 6. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:14 7. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:15 8. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:16 9. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:17 10. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:18 11. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:19 12. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:20 13. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:21 14. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:22 15. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:23 16. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:24 17. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:25 18. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:26 19. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:27 20. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:28 21. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:29 22. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:30 23. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:31 24. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:32 25. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:15:33 # There are no hangs anymore. Output with sysfs attribute con_drop set to 0 and identical setting for z/VM console 'term more 5 2'. Sometimes hitting the clear key at the x3270 console to progress output. # ./droptest.sh cons_drop no vmcp term more 5 2 Run 4 iterations of echo t > /proc/sysrq-trigger 1. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:20:58 2. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:24:32 3. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:28:04 4. command 'echo t > /proc/sysrq-trigger' at 2022-09-02,10:31:37 # Details: Enable function raw3215_write() to handle tab expansion and newlines and feed it with input not larger than the console buffer of 65536 bytes. Function raw3125_putchar() just forwards its character for output to raw3215_write(). This moves tab to blank conversion to one function raw3215_write() which also does call raw3215_make_room() to wait for enough free buffer space. Function handle_write() loops over all its input and segments input into chunks of console buffer size (should the input be larger). Rework tab expansion handling logic to avoid code duplication. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com> Acked-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2022-10-25media: vivid.rst: loop_video is set on the capture devnodeHans Verkuil1-1/+1
The example on how to use and test Capture Overlay specified the wrong video device node. Back in 2015 the loop_video control moved from the output device to the capture device, but this example code is still referring to the output video device. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2022-10-22Merge tag 'acpi-6.1-rc2' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI fixes from Rafael Wysocki: "These fix issues introduced during this merge window (ACPI/PCI, device enumeration and documentation) and some other ones found recently. Specifics: - Add missing device reference counting to acpi_get_pci_dev() after changing it recently (Rafael Wysocki) - Fix resource list walk in acpi_dma_get_range() (Robin Murphy) - Add IRQ override quirk for LENOVO IdeaPad and extend the IRQ override warning message (Jiri Slaby) - Fix integer overflow in ghes_estatus_pool_init() (Ashish Kalra) - Fix multiple error records handling in one of the ACPI extlog driver code paths (Tony Luck) - Prune DSDT override documentation from index after dropping it (Bagas Sanjaya)" * tag 'acpi-6.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: scan: Fix DMA range assignment ACPI: PCI: Fix device reference counting in acpi_get_pci_dev() ACPI: resource: note more about IRQ override ACPI: resource: do IRQ override on LENOVO IdeaPad ACPI: extlog: Handle multiple records ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init() Documentation: ACPI: Prune DSDT override documentation from index
2022-10-21Merge branches 'acpi-scan', 'acpi-resource', 'acpi-apei', 'acpi-extlog' and ↵Rafael J. Wysocki1-1/+0
'acpi-docs' Merge assorted ACPI fixes for 6.1-rc2: - Fix resource list walk in acpi_dma_get_range() (Robin Murphy). - Add IRQ override quirk for LENOVO IdeaPad and extend the IRQ override warning message (Jiri Slaby). - Fix integer overflow in ghes_estatus_pool_init() (Ashish Kalra). - Fix multiple error records handling in one of the ACPI extlog driver code paths (Tony Luck). - Prune DSDT override documentation from index after dropping it (Bagas Sanjaya). * acpi-scan: ACPI: scan: Fix DMA range assignment * acpi-resource: ACPI: resource: note more about IRQ override ACPI: resource: do IRQ override on LENOVO IdeaPad * acpi-apei: ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init() * acpi-extlog: ACPI: extlog: Handle multiple records * acpi-docs: Documentation: ACPI: Prune DSDT override documentation from index
2022-10-20docs: sysctl/fs: re-order, prettifyStephen Kitt2-98/+92
This brings the text markup in line with sysctl/abi and sysctl/kernel: * the entries are ordered alphabetically * the table of contents is automatically generated * markup is used as appropriate for constants etc. The content isn't fully up-to-date but the obsolete entries are gone, so remove the kernel version mention. Signed-off-by: Stephen Kitt <steve@sk2.org> Link: https://lore.kernel.org/r/20220930102937.135841-6-steve@sk2.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-10-20docs: sysctl/fs: remove references to super-max/-nrStephen Kitt1-10/+0
These were removed in 2.4.7.8. Remove references to super-max and super-nr in the sysctl documentation. Signed-off-by: Stephen Kitt <steve@sk2.org> Link: https://lore.kernel.org/r/20220930102937.135841-5-steve@sk2.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-10-20docs: sysctl/fs: merge the aio sectionsStephen Kitt1-13/+5
There are two sections documenting aio-nr and aio-max-nr, merge them. I kept the second explanation of aio-nr, which seems clearer to me, along with the effects of the values from the first section. Signed-off-by: Stephen Kitt <steve@sk2.org> Link: https://lore.kernel.org/r/20220930102937.135841-4-steve@sk2.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-10-20docs: sysctl/fs: remove references to dquot-max/-nrStephen Kitt1-16/+0
dquot-max was removed in 2.4.10.5; dquot-nr was replaced with dqstats in 2.5.18 which is now /proc/sys/fs/quota. Remove references to dquot-max and dquot-nr in the sysctl documentation. Signed-off-by: Stephen Kitt <steve@sk2.org> Link: https://lore.kernel.org/r/20220930102937.135841-3-steve@sk2.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-10-20docs: sysctl/fs: remove references to inode-maxStephen Kitt1-12/+4
inode-max was removed in 2.3.20pre1, remove references to it in the sysctl documentation. Signed-off-by: Stephen Kitt <steve@sk2.org> Link: https://lore.kernel.org/r/20220930102937.135841-2-steve@sk2.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2022-10-19dm verity: Add documentation for try_verify_in_tasklet optionMilan Broz1-0/+4
Add documentation that was missing from commit 5721d4e5a9cd ("dm verity: Add optional "try_verify_in_tasklet" feature"). Signed-off-by: Milan Broz <gmazyland@gmail.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2022-10-14Merge tag 'sched-psi-2022-10-14' of ↵Linus Torvalds1-0/+23
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull PSI updates from Ingo Molnar: - Various performance optimizations, resulting in a 4%-9% speedup in the mmtests/config-scheduler-perfpipe micro-benchmark. - New interface to turn PSI on/off on a per cgroup level. * tag 'sched-psi-2022-10-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/psi: Per-cgroup PSI accounting disable/re-enable interface sched/psi: Cache parent psi_group to speed up group iteration sched/psi: Consolidate cgroup_psi() sched/psi: Add PSI_IRQ to track IRQ/SOFTIRQ pressure sched/psi: Remove NR_ONCPU task accounting sched/psi: Optimize task switch inside shared cgroups again sched/psi: Move private helpers to sched/stats.h sched/psi: Save percpu memory when !psi_cgroups_enabled sched/psi: Don't create cgroup PSI files when psi_disabled sched/psi: Fix periodic aggregation shut off
2022-10-13Documentation: ACPI: Prune DSDT override documentation from indexBagas Sanjaya1-1/+0
Commit d206cef03c4827 ("ACPI: docs: Drop useless DSDT override documentation") removes useless DSDT override documentation. However, the commit forgets to prune the documentation entry from table of contents of ACPI admin guide documentation, hence triggers Sphinx warning: Documentation/admin-guide/acpi/index.rst:8: WARNING: toctree contains reference to nonexisting document 'admin-guide/acpi/dsdt-override' Prune the entry to fix the warning. Fixes: d206cef03c4827 ("ACPI: docs: Drop useless DSDT override documentation") Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-10-13Merge tag 'for-linus-6.1-rc1-tag' of ↵Linus Torvalds1-0/+6
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen updates from Juergen Gross: - Some minor typo fixes - A fix of the Xen pcifront driver for supporting the device model to run in a Linux stub domain - A cleanup of the pcifront driver - A series to enable grant-based virtio with Xen on x86 - A cleanup of Xen PV guests to distinguish between safe and faulting MSR accesses - Two fixes of the Xen gntdev driver - Two fixes of the new xen grant DMA driver * tag 'for-linus-6.1-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: Kconfig: Fix spelling mistake "Maxmium" -> "Maximum" xen/pv: support selecting safe/unsafe msr accesses xen/pv: refactor msr access functions to support safe and unsafe accesses xen/pv: fix vendor checks for pmu emulation xen/pv: add fault recovery control to pmu msr accesses xen/virtio: enable grant based virtio on x86 xen/virtio: use dom0 as default backend for CONFIG_XEN_VIRTIO_FORCE_GRANT xen/virtio: restructure xen grant dma setup xen/pcifront: move xenstore config scanning into sub-function xen/gntdev: Accommodate VMA splitting xen/gntdev: Prevent leaking grants xen/virtio: Fix potential deadlock when accessing xen_grant_dma_devices xen/virtio: Fix n_pages calculation in xen_grant_dma_map(unmap)_page() xen/xenbus: Fix spelling mistake "hardward" -> "hardware" xen-pcifront: Handle missed Connected state
2022-10-12Merge tag 'mm-nonmm-stable-2022-10-11' of ↵Linus Torvalds1-0/+5
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-MM updates from Andrew Morton: - hfs and hfsplus kmap API modernization (Fabio Francesco) - make crash-kexec work properly when invoked from an NMI-time panic (Valentin Schneider) - ntfs bugfixes (Hawkins Jiawei) - improve IPC msg scalability by replacing atomic_t's with percpu counters (Jiebin Sun) - nilfs2 cleanups (Minghao Chi) - lots of other single patches all over the tree! * tag 'mm-nonmm-stable-2022-10-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (71 commits) include/linux/entry-common.h: remove has_signal comment of arch_do_signal_or_restart() prototype proc: test how it holds up with mapping'less process mailmap: update Frank Rowand email address ia64: mca: use strscpy() is more robust and safer init/Kconfig: fix unmet direct dependencies ia64: update config files nilfs2: replace WARN_ONs by nilfs_error for checkpoint acquisition failure fork: remove duplicate included header files init/main.c: remove unnecessary (void*) conversions proc: mark more files as permanent nilfs2: remove the unneeded result variable nilfs2: delete unnecessary checks before brelse() checkpatch: warn for non-standard fixes tag style usr/gen_init_cpio.c: remove unnecessary -1 values from int file ipc/msg: mitigate the lock contention with percpu counter percpu: add percpu_counter_add_local and percpu_counter_sub_local fs/ocfs2: fix repeated words in comments relay: use kvcalloc to alloc page array in relay_alloc_page_array proc: make config PROC_CHILDREN depend on PROC_FS fs: uninline inode_maybe_inc_iversion() ...
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