mirror of https://gitee.com/openkylin/linux.git
45 Commits
Author | SHA1 | Message | Date |
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Linus Torvalds | 09d79d1033 |
Connect the newly RST-formatted documentation to the rest; this had to wait
until the input pull was done. There's also a few small fixes that wandered in. -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJZFKWWAAoJEI3ONVYwIuV6e1QP/iuwl4dBo9wl8KZAarErCWSf uAXx33ca4dnPOoxbDwRtg41ioSrF69vVjJp35oyBBSOVyDhQiLvec0Fq6EGObRo4 Xsoe0JwvadqY+aTETxXm3Id4aZHk3OMyCtZRinomeU9tN5dRNQaffvLG6Rtl7JK2 /tlqeNTmD1hLoD7azuvhwKfPYWDaYvmqd5I6F/2ANhYyJSg7pivpuN3Xfpf8GaiG wmaCqF0OLKBXfTPQwC69YX7PPye3AOGUbIYt6RwfVhutKkXjazsH7n3vSJD63UFn 8/1eh+UjOGWfriz5oih3DTd+Hf1A7KhRCyxoOSReo78Z3k3YXqmOFgCCgfE0oX71 2WIdEBHiNnHNH8bdaTMIfqjG0JvNzYmXq+uXvHWiW8juhE/2ZhNRG+uyrRiADctm TWjC4v219yY5h2IMcfyWOyLi1q/4zM3nmc8J1Ia+J9jH6ICKM+8sMrHaMyoSlCIQ FcYe6gQdD1NepV675QiZUObCxUWu840jNSqYtF+0Ck/DREJKDEAdS7cmCxfDSAgf oh6LsSHZy8tMyeOa9Wf9d5EPzK/eqd7x/vMKPI3jaETrwdXZzjO6Bn3codWx/gl6 7E/xqE8qCremcOWHIyx9jhd6T38swD+NScLU9CfRCKh+mddRDy3IiXD6NBo+m6Rq echBXgxl/P0CIck2W4Ql =Zk24 -----END PGP SIGNATURE----- Merge tag 'docs-4.12-2' of git://git.lwn.net/linux Pull more documentation updates from Jonathan Corbet: "Connect the newly RST-formatted documentation to the rest; this had to wait until the input pull was done. There's also a few small fixes that wandered in" * tag 'docs-4.12-2' of git://git.lwn.net/linux: doc: replace FTP URL to kernel.org with HTTPS one docs: update references to the device io book Documentation: earlycon: fix Marvell Armada 3700 UART name docs-rst: add input docs at main index and use kernel-figure |
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Linus Torvalds | 73ccb023a2 |
NFS client updates for Linux 4.12
Highlights include: Stable bugfixes: - Fix use after free in write error path - Use GFP_NOIO for two allocations in writeback - Fix a hang in OPEN related to server reboot - Check the result of nfs4_pnfs_ds_connect - Fix an rcu lock leak Features: - Removal of the unmaintained and unused OSD pNFS layout - Cleanup and removal of lots of unnecessary dprintk()s - Cleanup and removal of some memory failure paths now that GFP_NOFS is guaranteed to never fail. - Remove the v3-only data server limitation on pNFS/flexfiles Bugfixes: - RPC/RDMA connection handling bugfixes - Copy offload: fixes to ensure the copied data is COMMITed to disk. - Readdir: switch back to using the ->iterate VFS interface - File locking fixes from Ben Coddington - Various use-after-free and deadlock issues in pNFS - Write path bugfixes -----BEGIN PGP SIGNATURE----- iQIbBAABAgAGBQJZE0KiAAoJEGcL54qWCgDy/moP93wZ+cGnN5sC+nsirqj4eUiM BQKKonweNQIoYRwp5B9jLTxsUMIxRasV5W3BbqEm4PUtBYXfqQ7SfLv7RboKbd4M RJB9PS+sjx3Fxf65mhveKziwUFLvQCQ3+we0TpUga6+7SBiGlgPKBfisk7frC0nt BbYBuGaWXMPxO0BnR8adNwqiGINPDSzB+8sgjiT8zkZLm4lrew2eV7TDvwVOguD+ S2vLPGhg1F9wu8aG731MgiSNaeCgsBP6I5D29fTTD7z1DCNMQXOoHcX8k4KwwIDB sHRR0tVBsg+1B7WdH4y41GQ03rn3o2DHeJB5cdYGaEu4lx7CecCzt0o0dfAkNizT 5LxbQxIHPNYMeZmP2T0oD41zQyfjKqrdRSPnXi3dPD98NwaM1Lqv+Kzb/eXzupXp vJ7859PQCa3KjQ1IFhwdXTmh53J1c8SzEDpzz7WX0R0saRyxeIJsm30MmdPqKu7Z notjsXxrTmjIhC+0vFLey1kejFDh+b0gT6UIwoMdx39VL9AM6DVL7HsrU1kEwCdf f8otaLcm0WoUaseF+cMtfRNGEqCMxPywwz7mEKlGiVZgyAM8VfzH+s5j6/u6ncwS ASwRclwwPAZN97rzl0exZxuaRwFZd7oFT1zrviPWvv+0SUPuy258J6QpolUSavgi Qh7f3QR65K+QX9QbO1g= =7Nm2 -----END PGP SIGNATURE----- Merge tag 'nfs-for-4.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs Pull NFS client updates from Trond Myklebust: "Highlights include: Stable bugfixes: - Fix use after free in write error path - Use GFP_NOIO for two allocations in writeback - Fix a hang in OPEN related to server reboot - Check the result of nfs4_pnfs_ds_connect - Fix an rcu lock leak Features: - Removal of the unmaintained and unused OSD pNFS layout - Cleanup and removal of lots of unnecessary dprintk()s - Cleanup and removal of some memory failure paths now that GFP_NOFS is guaranteed to never fail. - Remove the v3-only data server limitation on pNFS/flexfiles Bugfixes: - RPC/RDMA connection handling bugfixes - Copy offload: fixes to ensure the copied data is COMMITed to disk. - Readdir: switch back to using the ->iterate VFS interface - File locking fixes from Ben Coddington - Various use-after-free and deadlock issues in pNFS - Write path bugfixes" * tag 'nfs-for-4.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (89 commits) pNFS/flexfiles: Always attempt to call layoutstats when flexfiles is enabled NFSv4.1: Work around a Linux server bug... NFS append COMMIT after synchronous COPY NFSv4: Fix exclusive create attributes encoding NFSv4: Fix an rcu lock leak nfs: use kmap/kunmap directly NFS: always treat the invocation of nfs_getattr as cache hit when noac is on Fix nfs_client refcounting if kmalloc fails in nfs4_proc_exchange_id and nfs4_proc_async_renew NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION pNFS: Fix NULL dereference in pnfs_generic_alloc_ds_commits pNFS: Fix a typo in pnfs_generic_alloc_ds_commits pNFS: Fix a deadlock when coalescing writes and returning the layout pNFS: Don't clear the layout return info if there are segments to return pNFS: Ensure we commit the layout if it has been invalidated pNFS: Don't send COMMITs to the DSes if the server invalidated our layout pNFS/flexfiles: Fix up the ff_layout_write_pagelist failure path pNFS: Ensure we check layout validity before marking it for return NFS4.1 handle interrupted slot reuse from ERR_DELAY NFSv4: check return value of xdr_inline_decode nfs/filelayout: fix NULL pointer dereference in fl_pnfs_update_layout() ... |
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Linus Torvalds | de4d195308 |
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar: "The main changes are: - Debloat RCU headers - Parallelize SRCU callback handling (plus overlapping patches) - Improve the performance of Tree SRCU on a CPU-hotplug stress test - Documentation updates - Miscellaneous fixes" * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (74 commits) rcu: Open-code the rcu_cblist_n_lazy_cbs() function rcu: Open-code the rcu_cblist_n_cbs() function rcu: Open-code the rcu_cblist_empty() function rcu: Separately compile large rcu_segcblist functions srcu: Debloat the <linux/rcu_segcblist.h> header srcu: Adjust default auto-expediting holdoff srcu: Specify auto-expedite holdoff time srcu: Expedite first synchronize_srcu() when idle srcu: Expedited grace periods with reduced memory contention srcu: Make rcutorture writer stalls print SRCU GP state srcu: Exact tracking of srcu_data structures containing callbacks srcu: Make SRCU be built by default srcu: Fix Kconfig botch when SRCU not selected rcu: Make non-preemptive schedule be Tasks RCU quiescent state srcu: Expedite srcu_schedule_cbs_snp() callback invocation srcu: Parallelize callback handling kvm: Move srcu_struct fields to end of struct kvm rcu: Fix typo in PER_RCU_NODE_PERIOD header comment rcu: Use true/false in assignment to bool rcu: Use bool value directly ... |
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Linus Torvalds | 28b47809b2 |
IOMMU Updates for Linux v4.12
This includes: * Some code optimizations for the Intel VT-d driver * Code to switch off a previously enabled Intel IOMMU * Support for 'struct iommu_device' for OMAP, Rockchip and Mediatek IOMMUs * Some header optimizations for IOMMU core code headers and a few fixes that became necessary in other parts of the kernel because of that * ACPI/IORT updates and fixes * Some Exynos IOMMU optimizations * Code updates for the IOMMU dma-api code to bring it closer to use per-cpu iova caches * New command-line option to set default domain type allocated by the iommu core code * Another command line option to allow the Intel IOMMU switched off in a tboot environment * ARM/SMMU: TLB sync optimisations for SMMUv2, Support for using an IDENTITY domain in conjunction with DMA ops, Support for SMR masking, Support for 16-bit ASIDs (was previously broken) * Various other small fixes and improvements -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABAgAGBQJZEY4XAAoJECvwRC2XARrjth0QAKV56zjnFclv39aDo6eCq9CT 51+XT4bPY5VKQ2+Jx76TBNObHmGK+8KEMHfT9khpWJtFCDyy25SGckLry1nYqmZs tSTsbj4sOeCyKzOLITlRN9/OzKXkjKAxYuq+sQZZFDFYf3kCM/eag0dGAU6aVLNp tkIal3CSpGjCQ9M5JohrtQ1mwiGqCIkMIgvnBjRw+bfpLnQNG+VL6VU2G3RAkV2b 5Vbdoy+P7ZQnJSZr/bibYL2BaQs2diR4gOppT5YbsfniMq4QYSjheu1xBboGX8b7 sx8yuPi4370irSan0BDvlvdQdjBKIRiDjfGEKDhRwPhtvN6JREGakhEOC8MySQ37 mP96B72Lmd+a7DEl5udOL7tQILA0DcUCX0aOyF714khnZuFU5tVlCotb/36xeJ+T FPc3RbEVQ90m8dYU6MNJ+ahtb/ZapxGTRfisIigB6wlnZa0Evabp9EJSce6oJMkm whbBhDubeEU18n9XAaofMbu+P2LAzq8cxiRMlsDvT4mIy7jO86jjCmhpu1Tfn2GY 4wrEQZdWOMvhUsIhObXA0aC3BzC506uvnKPW3qy041RaxBuelWiBi29qzYbhxzkr DLDpWbUZNYPyFJjttpavyQb2/XRduBTJdVP1pQpkJNDsW5jLiBkpSqm9xNADapRY vLSYRX0JCIquaD+PAuxn =3aE8 -----END PGP SIGNATURE----- Merge tag 'iommu-updates-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull IOMMU updates from Joerg Roedel: - code optimizations for the Intel VT-d driver - ability to switch off a previously enabled Intel IOMMU - support for 'struct iommu_device' for OMAP, Rockchip and Mediatek IOMMUs - header optimizations for IOMMU core code headers and a few fixes that became necessary in other parts of the kernel because of that - ACPI/IORT updates and fixes - Exynos IOMMU optimizations - updates for the IOMMU dma-api code to bring it closer to use per-cpu iova caches - new command-line option to set default domain type allocated by the iommu core code - another command line option to allow the Intel IOMMU switched off in a tboot environment - ARM/SMMU: TLB sync optimisations for SMMUv2, Support for using an IDENTITY domain in conjunction with DMA ops, Support for SMR masking, Support for 16-bit ASIDs (was previously broken) - various other small fixes and improvements * tag 'iommu-updates-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (63 commits) soc/qbman: Move dma-mapping.h include to qman_priv.h soc/qbman: Fix implicit header dependency now causing build fails iommu: Remove trace-events include from iommu.h iommu: Remove pci.h include from trace/events/iommu.h arm: dma-mapping: Don't override dma_ops in arch_setup_dma_ops() ACPI/IORT: Fix CONFIG_IOMMU_API dependency iommu/vt-d: Don't print the failure message when booting non-kdump kernel iommu: Move report_iommu_fault() to iommu.c iommu: Include device.h in iommu.h x86, iommu/vt-d: Add an option to disable Intel IOMMU force on iommu/arm-smmu: Return IOVA in iova_to_phys when SMMU is bypassed iommu/arm-smmu: Correct sid to mask iommu/amd: Fix incorrect error handling in amd_iommu_bind_pasid() iommu: Make iommu_bus_notifier return NOTIFY_DONE rather than error code omap3isp: Remove iommu_group related code iommu/omap: Add iommu-group support iommu/omap: Make use of 'struct iommu_device' iommu/omap: Store iommu_dev pointer in arch_data iommu/omap: Move data structures to omap-iommu.h iommu/omap: Drop legacy-style device support ... |
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Andre Przywara | f7c864e7ee |
Documentation: earlycon: fix Marvell Armada 3700 UART name
The Marvell Armada 3700 UART uses "ar3700_uart" for its earlycon name. Adjust documentation to match the code. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Joerg Roedel | 2c0248d688 | Merge branches 'arm/exynos', 'arm/omap', 'arm/rockchip', 'arm/mediatek', 'arm/smmu', 'arm/core', 'x86/vt-d', 'x86/amd' and 'core' into next | |
Linus Torvalds | 7af4c727c7 |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Pull HID subsystem updates from Jiri Kosina: - The need for HID_QUIRK_NO_INIT_REPORTS per-device quirk has been growing dramatically during past years, so the time has come to switch over the default, and perform the pro-active reading only in cases where it's really needed (multitouch, wacom). The only place where this behavior is (in some form) preserved is hiddev so that we don't introduce userspace-visible change of behavior. From Benjamin Tissoires - HID++ support for power_supply / baterry reporting. From Benjamin Tissoires and Bastien Nocera - Vast improvements / rework of DS3 and DS4 in Sony driver. From Roderick Colenbrander - Improvment (in terms of getting closer to the Microsoft's interpretation of slightly ambiguous specification) of logical range interpretation in case null-state is set in the rdesc. From Valtteri Heikkilä and Tomasz Kramkowski - A lot of newly supported device IDs and small assorted fixes * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (71 commits) HID: usbhid: Add HID_QUIRK_NOGET for Aten CS-1758 KVM switch HID: asus: support backlight on USB keyboards HID: wacom: Move wacom_remote_irq and wacom_remote_status_irq HID: wacom: generic: sync pad events only for actual packets HID: sony: remove redundant check for -ve err HID: sony: Make sure to unregister sensors on failure HID: sony: Make DS4 bt poll interval adjustable HID: sony: Set proper bit flags on DS4 output report HID: sony: DS4 use brighter LED colors HID: sony: Improve navigation controller axis/button mapping HID: sony: Use DS3 MAC address as unique identifier on USB HID: logitech-hidpp: add a sysfs file to tell we support power_supply HID: logitech-hidpp: enable HID++ 1.0 battery reporting HID: logitech-hidpp: add support for battery status for the K750 HID: logitech-hidpp: battery: provide CAPACITY_LEVEL HID: logitech-hidpp: rename battery level into capacity HID: logitech-hidpp: battery: provide ONLINE property HID: logitech-hidpp: notify battery on connect HID: logitech-hidpp: return an error if the queried feature is not present HID: logitech-hidpp: create the battery for all types of HID++ devices ... |
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Jiri Kosina | 4d6ca227c7 | Merge branch 'for-4.12/asus' into for-linus | |
Linus Torvalds | 7d6a31c394 |
Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 debug updates from Ingo Molnar: "The biggest update is the addition of USB3 debug port based early-console. Greg was fine with the USB changes and with the routing of these patches: https://www.spinics.net/lists/linux-usb/msg155093.html" * 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: usb/doc: Add document for USB3 debug port usage usb/serial: Add DBC debug device support to usb_debug x86/earlyprintk: Add support for earlyprintk via USB3 debug port usb/early: Add driver for xhci debug capability x86/timers: Add simple udelay calibration |
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Linus Torvalds | 3dee9fb2a4 |
Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS updates from Ingo Molnar: "The main changes in this cycle were: - add the 'Corrected Errors Collector' kernel feature which collect and monitor correctable errors statistics and will preemptively (soft-)offline physical pages that have a suspiciously high error count. - handle MCE errors during kexec() more gracefully - factor out and deprecate the /dev/mcelog driver - ... plus misc fixes and cleanpus" * 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mce: Check MCi_STATUS[MISCV] for usable addr on Intel only ACPI/APEI: Use setup_deferrable_timer() x86/mce: Update notifier priority check x86/mce: Enable PPIN for Knights Landing/Mill x86/mce: Do not register notifiers with invalid prio x86/mce: Factor out and deprecate the /dev/mcelog driver RAS: Add a Corrected Errors Collector x86/mce: Rename mce_log to mce_log_buffer x86/mce: Rename mce_log()'s argument x86/mce: Init some CPU features early x86/mce: Handle broadcasted MCE gracefully with kexec |
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Hans-Christian Noren Egtvedt | c0c74acbb6 |
docs: remove all references to AVR32 architecture
The AVR32 architecture support has been removed from the Linux kernel, hence remove all references to it from Documentation. Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> Signed-off-by: Håvard Skinnemoen <hskinnemoen@gmail.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> |
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Paul E. McKenney | 22607d66bb |
srcu: Specify auto-expedite holdoff time
On small systems, in the absence of readers, expedited SRCU grace periods can complete in less than a microsecond. This means that an eight-CPU system can have all CPUs doing synchronize_srcu() in a tight loop and almost always expedite. This might actually be desirable in some situations, but in general it is a good way to needlessly burn CPU cycles. And in those situations where it is desirable, your friend is the function synchronize_srcu_expedited(). For other situations, this commit adds a kernel parameter that specifies a holdoff between completing the last SRCU grace period and auto-expediting the next. If the next grace period starts before the holdoff expires, auto-expediting is disabled. The holdoff is 50 microseconds by default, and can be tuned to the desired number of nanoseconds. A value of zero disables auto-expediting. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Tested-by: Mike Galbraith <efault@gmx.de> |
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Shaohua Li | bfd20f1cc8 |
x86, iommu/vt-d: Add an option to disable Intel IOMMU force on
IOMMU harms performance signficantly when we run very fast networking workloads. It's 40GB networking doing XDP test. Software overhead is almost unaware, but it's the IOTLB miss (based on our analysis) which kills the performance. We observed the same performance issue even with software passthrough (identity mapping), only the hardware passthrough survives. The pps with iommu (with software passthrough) is only about ~30% of that without it. This is a limitation in hardware based on our observation, so we'd like to disable the IOMMU force on, but we do want to use TBOOT and we can sacrifice the DMA security bought by IOMMU. I must admit I know nothing about TBOOT, but TBOOT guys (cc-ed) think not eabling IOMMU is totally ok. So introduce a new boot option to disable the force on. It's kind of silly we need to run into intel_iommu_init even without force on, but we need to disable TBOOT PMR registers. For system without the boot option, nothing is changed. Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> |
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Christoph Hellwig | 6d22323b2e |
nfs: remove the objlayout driver
The objlayout code has been in the tree, but it's been unmaintained and no server product for it actually ever shipped. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> |
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Joerg Roedel | acf7f76b64 | Merge branch 'for-joerg/arm-smmu/updates' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu | |
Will Deacon | fccb4e3b8a |
iommu: Allow default domain type to be set on the kernel command line
The IOMMU core currently initialises the default domain for each group to IOMMU_DOMAIN_DMA, under the assumption that devices will use IOMMU-backed DMA ops by default. However, in some cases it is desirable for the DMA ops to bypass the IOMMU for performance reasons, reserving use of translation for subsystems such as VFIO that require it for enforcing device isolation. Rather than modify each IOMMU driver to provide different semantics for DMA domains, instead we introduce a command line parameter that can be used to change the type of the default domain. Passthrough can then be specified using "iommu.passthrough=1" on the kernel command line. Signed-off-by: Will Deacon <will.deacon@arm.com> |
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Mark Rutland | b0845ce583 |
kasan: report only the first error by default
Disable kasan after the first report. There are several reasons for this: - Single bug quite often has multiple invalid memory accesses causing storm in the dmesg. - Write OOB access might corrupt metadata so the next report will print bogus alloc/free stacktraces. - Reports after the first easily could be not bugs by itself but just side effects of the first one. Given that multiple reports usually only do harm, it makes sense to disable kasan after the first one. If user wants to see all the reports, the boot-time parameter kasan_multi_shot must be used. [aryabinin@virtuozzo.com: wrote changelog and doc, added missing include] Link: http://lkml.kernel.org/r/20170323154416.30257-1-aryabinin@virtuozzo.com Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Borislav Petkov | 011d826111 |
RAS: Add a Corrected Errors Collector
Introduce a simple data structure for collecting correctable errors along with accessors. More detailed description in the code itself. The error decoding is done with the decoding chain now and mce_first_notifier() gets to see the error first and the CEC decides whether to log it and then the rest of the chain doesn't hear about it - basically the main reason for the CE collector - or to continue running the notifiers. When the CEC hits the action threshold, it will try to soft-offine the page containing the ECC and then the whole decoding chain gets to see the error. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/20170327093304.10683-5-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Lu Baolu | 1b5aeebf3a |
x86/earlyprintk: Add support for earlyprintk via USB3 debug port
Add support for earlyprintk by writing debug messages to the USB3 debug port. Users can use this type of early printk by specifying the kernel parameter of "earlyprintk=xdbc". This gives users a chance of providing debugging output. The hardware for USB3 debug port requires DMA memory blocks. This requires to delay setting up debugging hardware and registering boot console until the memblocks are filled. Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mathias Nyman <mathias.nyman@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linux-usb@vger.kernel.org Link: http://lkml.kernel.org/r/1490083293-3792-4-git-send-email-baolu.lu@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Linus Torvalds | c1aa905a30 |
Power management updates for v4.11-rc2
- Three fixes for intel_pstate problems related to the passive mode (in which it acts as a regular cpufreq scaling driver), two for the handling of global P-state limits and one for the handling of the cpu_frequency tracepoint in that mode (Rafael Wysocki). - Three fixes for the handling of P-state limits in intel_pstate in the active mode (Rafael Wysocki). - Introduction of a new cpufreq.off=1 kernel command line argument that will disable cpufreq entirely if passed to the kernel and is simply hooked up to the existing code used by Xen (Len Brown). - Fix for the schedutil cpufreq governor to prevent it from using stale raw frequency values in configurations with mutiple CPUs sharing one policy object and a cleanup for it reducing its overhead slightly (Viresh Kumar). -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJYwc9bAAoJEILEb/54YlRxU24P/2RPFpRYNtGNfbnvmyNjcA5H MLQ/i0HEqhBVsfsj2Kmy6sRkY/X/kqnOiD2PzGcaOMTtMx2FcLNHzNqH0P0I7A4W 9wzUcq0SC5FzTJcLryN4gtJa3tfBDHjr6peAcZyji5t3DbGa+mygVwH8IGyr4feo u7PE/6eXLfkRIySwG/kCI/YVE8tWuhjDHbjhR1pjgyrMjhDbPP480Mgsi4eDRRTO BwGVyQJXoMo9e7/vZ8Y8Fkt7PMxYeyeE1yAGHkJzjkFfdrkZrn3IUPfgVgxy8IPV N3w1BB+H84duEswPZH2patdIKQxXG3r0eaGHTXZIwy+5sHyc3mUMJ1FeHR67gasd Z4p4hylTP+dGZGDo4G7PbVX4V6zEP+LSxgOQYjbo4n6k3nJJOrIF4wt+l5+tQz5m Y+V6XVHgZm1LyFgjj06jMeVSmk6SS7X0qBHJ4WcfGzV/J+vStXmIvAmljs+cd/u2 R9z1W/rxelZFKT+4lRCuztpBYfJvlE5nXyM1XwC6Rz6QjFax0pJAHUPFznWyq24C GlMAvQWPapDEoOvDrS/QKeqX1ROOYf2FwHs+uvPPCvOxMjL9NCQsQ34tqCM3MiL/ ebk3uZ0xC1e0LaOB87xr7tfsag12MyZzSCwX0D8nBLBLvntpa/xQwE5+4vu9ZguD xlarnIsEh6bTwTVH6DJP =Gwp7 -----END PGP SIGNATURE----- Merge tag 'pm-4.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management fixes from Rafael Wysocki: "These fix several issues in the intel_pstate driver and one issue in the schedutil cpufreq governor, clean up that governor a bit and hook up existing code for disabling cpufreq to a new kernel command line option. Specifics: - Three fixes for intel_pstate problems related to the passive mode (in which it acts as a regular cpufreq scaling driver), two for the handling of global P-state limits and one for the handling of the cpu_frequency tracepoint in that mode (Rafael Wysocki). - Three fixes for the handling of P-state limits in intel_pstate in the active mode (Rafael Wysocki). - Introduction of a new cpufreq.off=1 kernel command line argument that will disable cpufreq entirely if passed to the kernel and is simply hooked up to the existing code used by Xen (Len Brown). - Fix for the schedutil cpufreq governor to prevent it from using stale raw frequency values in configurations with mutiple CPUs sharing one policy object and a cleanup for it reducing its overhead slightly (Viresh Kumar)" * tag 'pm-4.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq: intel_pstate: Do not reinit performance limits in ->setpolicy cpufreq: intel_pstate: Fix intel_pstate_verify_policy() cpufreq: intel_pstate: Fix global settings in active mode cpufreq: Add the "cpufreq.off=1" cmdline option cpufreq: schedutil: Pass sg_policy to get_next_freq() cpufreq: schedutil: move cached_raw_freq to struct sugov_policy cpufreq: intel_pstate: Avoid triggering cpu_frequency tracepoint unnecessarily cpufreq: intel_pstate: Fix intel_cpufreq_verify_policy() cpufreq: intel_pstate: Do not use performance_limits in passive mode |
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Rafael J. Wysocki | fd8e57d5d3 |
Merge branch 'pm-cpufreq'
* pm-cpufreq: cpufreq: intel_pstate: Do not reinit performance limits in ->setpolicy cpufreq: intel_pstate: Fix intel_pstate_verify_policy() cpufreq: intel_pstate: Fix global settings in active mode cpufreq: Add the "cpufreq.off=1" cmdline option cpufreq: intel_pstate: Avoid triggering cpu_frequency tracepoint unnecessarily cpufreq: intel_pstate: Fix intel_cpufreq_verify_policy() cpufreq: intel_pstate: Do not use performance_limits in passive mode |
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Linus Torvalds | f26db9649a |
There was some breakage with the changes for jump labels in the 4.11 merge
window. Namely powerpc broke as jump labels uses the two LSB bits as flags in initialization. A check was added to make sure that all jump label entries were 4 bytes aligned, but powerpc didn't work that way for modules. Adding an alignment in the module linker script appeared to be the best solution. Jump labels also added an anonymous union to access those LSB bits as a normal long. But because this structure had static initialization, it broke older compilers that could not statically initialize anonymous unions without brackets. The command line parameter for setting function graph filter broke the "EMPTY_HASH" descriptor by modifying it instead of creating a new hash to hold the entries. The command line parameter ftrace_graph_max_depth was added to allow its setting at boot time. It uses existing code and only the command line hook was added. This is not really a fix, but as it uses existing code without affecting anything else, I added it to this release. It was ready before the merge window closed, but I wanted to let it sit in linux-next for a couple of days first. -----BEGIN PGP SIGNATURE----- iQExBAABCAAbBQJYvNrAFBxyb3N0ZWR0QGdvb2RtaXMub3JnAAoJEMm5BfJq2Y3L JGQIAMkayeZ0OCyYHRPR4EcCrdE3fATmt1huJWHrMPnT4/fLabL8XQqrOpnOBMq1 GFZb1SMkBmvGtAHF4GbvCxnIUfDQko6BTQAd8EMea1WM8+Kb66/BLgJawjWIU9I0 dNYre9ONgR2NOzkz6nfKRXnmy0lRcOweBb09YYGSzY11Md7d8T3T4TUrPNZdYrO9 8ZMbF4qRd9KLMRHcsWqvhWhBISxWnmtUSlthfweukKgDMy8OKpb7pR0ckjtYwsWX RF41jqLqzSUqtd/nE2Sj/aT8XOP4pfrKEUuNM4SBj8q5jmNcZuqi8Q9wItu3LWR2 jqM/9UKTzaCr9cchwuvUC0i+jWc= =kDql -----END PGP SIGNATURE----- Merge tag 'trace-v4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing fixes from Steven Rostedt: "There was some breakage with the changes for jump labels in the 4.11 merge window: - powerpc broke as jump labels uses the two LSB bits as flags in initialization. A check was added to make sure that all jump label entries were 4 bytes aligned, but powerpc didn't work that way for modules. Adding an alignment in the module linker script appeared to be the best solution. - Jump labels also added an anonymous union to access those LSB bits as a normal long. But because this structure had static initialization, it broke older compilers that could not statically initialize anonymous unions without brackets. - The command line parameter for setting function graph filter broke the "EMPTY_HASH" descriptor by modifying it instead of creating a new hash to hold the entries. - The command line parameter ftrace_graph_max_depth was added to allow its setting at boot time. It uses existing code and only the command line hook was added. This is not really a fix, but as it uses existing code without affecting anything else, I added it to this release. It was ready before the merge window closed, but I wanted to let it sit in linux-next for a couple of days first" * tag 'trace-v4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: ftrace/graph: Add ftrace_graph_max_depth kernel parameter tracing: Add #undef to fix compile error jump_label: Add comment about initialization order for anonymous unions jump_label: Fix anonymous union initialization module: set __jump_table alignment to 8 ftrace/graph: Do not modify the EMPTY_HASH for the function_graph filter tracing: Fix code comment for ftrace_ops_get_func() |
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Tobias Jakobi | 933bfe4d27 |
HID: usbhid: extend polling interval configuration to joysticks
For mouse devices we can currently change the polling interval via usbhid.mousepoll. Implement the same thing for joysticks, so users can reduce input latency this way. This has been tested with a Logitech RumblePad 2 with jspoll=2, resulting in a polling rate of 500Hz (verified with evhz). Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> |
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Len Brown | d82f269255 |
cpufreq: Add the "cpufreq.off=1" cmdline option
Add the "cpufreq.off=1" cmdline option. At boot-time, this allows a user to request CONFIG_CPU_FREQ=n behavior from a kernel built with CONFIG_CPU_FREQ=y. This is analogous to the existing "cpuidle.off=1" option and CONFIG_CPU_IDLE=y This capability is valuable when we need to debug end-user issues in the BIOS or in Linux. It is also convenient for enabling comparisons, which may otherwise require a new kernel, or help from BIOS SETUP, which may be buggy or unavailable. Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Todd Brandt | 65a50c6562 |
ftrace/graph: Add ftrace_graph_max_depth kernel parameter
Early trace callgraphs can be extremely large on systems with several seconds of boot time. The max_depth parameter limits how deep the graph trace goes and reduces the output size. This parameter is the same as the max_graph_depth file in tracefs. Link: http://lkml.kernel.org/r/1488499935-23216-1-git-send-email-todd.e.brandt@linux.intel.com Signed-off-by: Todd Brandt <todd.e.brandt@linux.intel.com> [ changed comments about debugfs to tracefs ] Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
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Tejun Heo | 1663f26df3 |
slub: make sysfs directories for memcg sub-caches optional
SLUB creates a per-cache directory under /sys/kernel/slab which hosts a bunch of debug files. Usually, there aren't that many caches on a system and this doesn't really matter; however, if memcg is in use, each cache can have per-cgroup sub-caches. SLUB creates the same directories for these sub-caches under /sys/kernel/slab/$CACHE/cgroup. Unfortunately, because there can be a lot of cgroups, active or draining, the product of the numbers of caches, cgroups and files in each directory can reach a very high number - hundreds of thousands is commonplace. Millions and beyond aren't difficult to reach either. What's under /sys/kernel/slab is primarily for debugging and the information and control on the a root cache already cover its sub-caches. While having a separate directory for each sub-cache can be helpful for development, it doesn't make much sense to pay this amount of overhead by default. This patch introduces a boot parameter slub_memcg_sysfs which determines whether to create sysfs directories for per-memcg sub-caches. It also adds CONFIG_SLUB_MEMCG_SYSFS_ON which determines the boot parameter's default value and defaults to 0. [akpm@linux-foundation.org: kset_unregister(NULL) is legal] Link: http://lkml.kernel.org/r/20170204145203.GB26958@mtj.duckdns.org Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds | 37c85961c3 |
TTY/Serial driver patches for 4.11-rc1
Here is the big tty/serial driver patchset for 4.11-rc1. Not much here, but a lot of little fixes and individual serial driver updates all over the subsystem. Majority are for the sh-sci driver and platform (the arch-specific changes have acks from the maintainer). The start of the "serial bus" code is here as well, but nothing is converted to use it yet. That work is still ongoing, hopefully will start to show up across different subsystems for 4.12 (bluetooth is one major place that will be used.) All of these have been in linux-next for a while with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCWK2lDg8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ylwfwCgyExa4x8Lur2nZyu8cgcaVRU68VAAoNQh0WJt EZdEhEkRMt4d64j+ApYI =iv7x -----END PGP SIGNATURE----- Merge tag 'tty-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver updates from Greg KH: "Here is the big tty/serial driver patchset for 4.11-rc1. Not much here, but a lot of little fixes and individual serial driver updates all over the subsystem. Majority are for the sh-sci driver and platform (the arch-specific changes have acks from the maintainer). The start of the "serial bus" code is here as well, but nothing is converted to use it yet. That work is still ongoing, hopefully will start to show up across different subsystems for 4.12 (bluetooth is one major place that will be used.) All of these have been in linux-next for a while with no reported issues" * tag 'tty-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (109 commits) tty: pl011: Work around QDF2400 E44 stuck BUSY bit atmel_serial: Use the fractional divider when possible tty: Remove extra include in HVC console tty framework serial: exar: Enable MSI support serial: exar: Move register defines from uapi header to consumer site serial: pci: Remove unused pci_boards entries serial: exar: Move Commtech adapters to 8250_exar as well serial: exar: Fix feature control register constants serial: exar: Fix initialization of EXAR registers for ports > 0 serial: exar: Fix mapping of port I/O resources serial: sh-sci: fix hardware RX trigger level setting tty/serial: atmel: ensure state is restored after suspending serial: 8250_dw: Avoid "too much work" from bogus rx timeout interrupt serdev: ttyport: check whether tty_init_dev() fails serial: 8250_pci: make pciserial_detach_ports() static ARM: dts: STiH410-b2260: Enable HW flow-control ARM: dts: STiH407-family: Use new Pinctrl groups ARM: dts: STiH407-pinctrl: Add Pinctrl group for HW flow-control ARM: dts: STiH410-b2260: Identify the UART RTS line dt-bindings: serial: Update 'uart-has-rtscts' description ... |
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Linus Torvalds | e30aee9e10 |
char/misc driver patches for 4.11-rc1
Here is the big char/misc driver patchset for 4.11-rc1. Lots of different driver subsystems updated here. Rework for the hyperv subsystem to handle new platforms better, mei and w1 and extcon driver updates, as well as a number of other "minor" driver updates. Full details are in the shortlog below. All of these have been in linux-next for a while with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCWK2iRQ8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ynhFACguVE+/ixj5u5bT5DXQaZNai/6zIAAmgMWwd/t YTD2cwsJsGbTT1fY3SUe =CiSI -----END PGP SIGNATURE----- Merge tag 'char-misc-4.11-rc1' of 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 patchset for 4.11-rc1. Lots of different driver subsystems updated here: rework for the hyperv subsystem to handle new platforms better, mei and w1 and extcon driver updates, as well as a number of other "minor" driver updates. All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (169 commits) goldfish: Sanitize the broken interrupt handler x86/platform/goldfish: Prevent unconditional loading vmbus: replace modulus operation with subtraction vmbus: constify parameters where possible vmbus: expose hv_begin/end_read vmbus: remove conditional locking of vmbus_write vmbus: add direct isr callback mode vmbus: change to per channel tasklet vmbus: put related per-cpu variable together vmbus: callback is in softirq not workqueue binder: Add support for file-descriptor arrays binder: Add support for scatter-gather binder: Add extra size to allocator binder: Refactor binder_transact() binder: Support multiple /dev instances binder: Deal with contexts in debugfs binder: Support multiple context managers binder: Split flat_binder_object auxdisplay: ht16k33: remove private workqueue auxdisplay: ht16k33: rework input device initialization ... |
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Linus Torvalds | ff47d8c050 |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Martin Schwidefsky: - New entropy generation for the pseudo random number generator. - Early boot printk output via sclp to help debug crashes on boot. This needs to be enabled with a kernel parameter. - Add proper no-execute support with a bit in the page table entry. - Bug fixes and cleanups. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (65 commits) s390/syscall: fix single stepped system calls s390/zcrypt: make ap_bus explicitly non-modular s390/zcrypt: Removed unneeded debug feature directory creation. s390: add missing "do {} while (0)" loop constructs to multiline macros s390/mm: add cond_resched call to kernel page table dumper s390: get rid of MACHINE_HAS_PFMF and MACHINE_HAS_HPAGE s390/mm: make memory_block_size_bytes available for !MEMORY_HOTPLUG s390: replace ACCESS_ONCE with READ_ONCE s390: Audit and remove any remaining unnecessary uses of module.h s390: mm: Audit and remove any unnecessary uses of module.h s390: kernel: Audit and remove any unnecessary uses of module.h s390/kdump: Use "LINUX" ELF note name instead of "CORE" s390: add no-execute support s390: report new vector facilities s390: use correct input data address for setup_randomness s390/sclp: get rid of common response code handling s390/sclp: don't add new lines to each printed string s390/sclp: make early sclp code readable s390/sclp: disable early sclp code as soon as the base sclp driver is active s390/sclp: move early printk code to drivers ... |
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Linus Torvalds | 8a9365a472 |
Merge branch 'x86-cpufeature-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cpufeature updates from Ingo Molnar: "The main changes in this cycle were related to enable ring-3 MONITOR/MWAIT instructions support on supported CPUs, by Grzegorz Andrejczuk and Piotr Luc" * 'x86-cpufeature-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/cpufeature: Move RING3MWAIT feature to avoid conflicts x86/cpufeature: Enable RING3MWAIT for Knights Mill x86/cpufeature: Enable RING3MWAIT for Knights Landing x86/cpufeature: Add RING3MWAIT to CPU features x86/elf: Add HWCAP2 to expose ring 3 MONITOR/MWAIT x86/msr: Add MSR_MISC_FEATURE_ENABLES and RING3MWAIT bit x86/cpufeature: Add AVX512_VPOPCNTDQ feature |
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Linus Torvalds | f7458a5d63 |
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar: "The RCU changes in this cycle are: - Dynticks updates, consolidating open-coded counter accesses into a well-defined API - SRCU updates: Simplify algorithm, add formal verification - Documentation updates - Miscellaneous fixes - Torture-test updates Most of the diffstat comes from the relatively large documentation update" * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (42 commits) srcu: Reduce probability of SRCU ->unlock_count[] counter overflow rcutorture: Add CBMC-based formal verification for SRCU srcu: Force full grace-period ordering srcu: Implement more-efficient reader counts rcu: Adjust FQS offline checks for exact online-CPU detection rcu: Check cond_resched_rcu_qs() state less often to reduce GP overhead rcu: Abstract extended quiescent state determination rcu: Abstract dynticks extended quiescent state enter/exit operations rcu: Add lockdep checks to synchronous expedited primitives rcu: Eliminate unused expedited_normal counter llist: Clarify comments about when locking is needed rcu: Fix comment in rcu_organize_nocb_kthreads() rcu: Enable RCU tracepoints by default to aid in debugging rcu: Make rcu_cpu_starting() use its "cpu" argument rcu: Add comment headers to expedited-grace-period counter functions rcu: Don't wake rcuc/X kthreads on NOCB CPUs rcu: Re-enable TASKS_RCU for User Mode Linux rcu: Once again use NMI-based stack traces in stall warnings rcu: Remove short-term CPU kicking rcu: Add long-term CPU kicking ... |
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Thomas Gleixner | 47512cfd0d |
x86/platform/goldfish: Prevent unconditional loading
The goldfish platform code registers the platform device unconditionally
which causes havoc in several ways if the goldfish_pdev_bus driver is
enabled:
- Access to the hardcoded physical memory region, which is either not
available or contains stuff which is completely unrelated.
- Prevents that the interrupt of the serial port can be requested
- In case of a spurious interrupt it goes into a infinite loop in the
interrupt handler of the pdev_bus driver (which needs to be fixed
seperately).
Add a 'goldfish' command line option to make the registration opt-in when
the platform is compiled in.
I'm seriously grumpy about this engineering trainwreck, which has seven
SOBs from Intel developers for 50 lines of code. And none of them figured
out that this is broken. Impressive fail!
Fixes:
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Ding Tianhong | 5444ea6a7f |
clocksource/drivers/arm_arch_timer: Remove fsl-a008585 parameter
Having a command line option to flip the errata handling for a particular erratum is a little bit unusual, and it's vastly superior to pass this in the DT. By common consensus, it's best to kill off the command line parameter. Signed-off-by: Ding Tianhong <dingtianhong@huawei.com> [Mark: split patch, reword commit message] Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> |
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Grzegorz Andrejczuk | e16fd002af |
x86/cpufeature: Enable RING3MWAIT for Knights Landing
Enable ring 3 MONITOR/MWAIT for Intel Xeon Phi x200 codenamed Knights Landing. Presence of this feature cannot be detected automatically (by reading any other MSR) therefore it is required to explicitly check for the family and model of the CPU before attempting to enable it. Signed-off-by: Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com> Cc: Piotr.Luc@intel.com Cc: dave.hansen@linux.intel.com Link: http://lkml.kernel.org/r/1484918557-15481-5-git-send-email-grzegorz.andrejczuk@intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
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Heiko Carstens | 89175cf766 |
s390: provide sclp based boot console
Use the early sclp code to provide a boot console. This boot console is available if the kernel parameter "earlyprintk" has been specified, just like it works for other architectures that also provide an early boot console. This makes debugging of early problems much easier, since now we finally have working console output even before memory detection is running. The boot console will be automatically disabled as soon as another console will be registered. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
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Paul E. McKenney | e3c50dfbbd |
doc: Add rcutree.rcu_kick_kthreads to kernel-parameters.txt
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> |
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Martin Blumenstingl | ec84aa0a92 |
tty: serial: lantiq: implement earlycon support
This allows enabling earlycon for devices with a Lantiq serial console by splitting lqasc_serial_port_write() from lqasc_console_write() and re-using the new function for earlycon's write callback. The kernel-parameter name matches the driver name ("lantiq"), similar to how other drivers implement this. Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Linus Torvalds | 2fd8774c79 |
Merge branch 'stable/for-linus-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb
Pull swiotlb fixes from Konrad Rzeszutek Wilk: "This has one fix to make i915 work when using Xen SWIOTLB, and a feature from Geert to aid in debugging of devices that can't do DMA outside the 32-bit address space. The feature from Geert is on top of v4.10 merge window commit (specifically you pulling my previous branch), as his changes were dependent on the Documentation/ movement patches. I figured it would just easier than me trying than to cherry-pick the Documentation patches to satisfy git. The patches have been soaking since 12/20, albeit I updated the last patch due to linux-next catching an compiler error and adding an Tested-and-Reported-by tag" * 'stable/for-linus-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb: swiotlb: Export swiotlb_max_segment to users swiotlb: Add swiotlb=noforce debug option swiotlb: Convert swiotlb_force from int to enum x86, swiotlb: Simplify pci_swiotlb_detect_override() |
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Lv Zheng | 9c4aa1eecb |
ACPI / sysfs: Provide quirk mechanism to prevent GPE flooding
Sometimes, the users may require a quirk to be provided from ACPI subsystem core to prevent a GPE from flooding. Normally, if a GPE cannot be dispatched, ACPICA core automatically prevents the GPE from firing. But there are cases the GPE is dispatched by _Lxx/_Exx provided via AML table, and OSPM is lacking of the knowledge to get _Lxx/_Exx correctly executed to handle the GPE, thus the GPE flooding may still occur. The existing quirk mechanism can be enabled/disabled using the following commands to prevent such kind of GPE flooding during runtime: # echo mask > /sys/firmware/acpi/interrupts/gpe00 # echo unmask > /sys/firmware/acpi/interrupts/gpe00 To avoid GPE flooding during boot, we need a boot stage mechanism. This patch provides such a boot stage quirk mechanism to stop this kind of GPE flooding. This patch doesn't fix any feature gap but since the new feature gaps could be found in the future endlessly, and can disappear if the feature gaps are filled, providing a boot parameter rather than a DMI table should suffice. Link: https://bugzilla.kernel.org/show_bug.cgi?id=53071 Link: https://bugzilla.kernel.org/show_bug.cgi?id=117481 Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/887793 Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Mimi Zohar | d68a6fe9fc |
ima: define a canonical binary_runtime_measurements list format
The IMA binary_runtime_measurements list is currently in platform native format. To allow restoring a measurement list carried across kexec with a different endianness than the targeted kernel, this patch defines little-endian as the canonical format. For big endian systems wanting to save/restore the measurement list from a system with a different endianness, a new boot command line parameter named "ima_canonical_fmt" is defined. Considerations: use of the "ima_canonical_fmt" boot command line option will break existing userspace applications on big endian systems expecting the binary_runtime_measurements list to be in platform native format. Link: http://lkml.kernel.org/r/1480554346-29071-10-git-send-email-zohar@linux.vnet.ibm.com Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Acked-by: Dmitry Kasatkin <dmitry.kasatkin@gmail.com> Cc: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Andreas Steffen <andreas.steffen@strongswan.org> Cc: Josh Sklar <sklar@linux.vnet.ibm.com> Cc: Dave Young <dyoung@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Geert Uytterhoeven | fff5d99225 |
swiotlb: Add swiotlb=noforce debug option
On architectures like arm64, swiotlb is tied intimately to the core architecture DMA support. In addition, ZONE_DMA cannot be disabled. To aid debugging and catch devices not supporting DMA to memory outside the 32-bit address space, add a kernel command line option "swiotlb=noforce", which disables the use of bounce buffers. If specified, trying to map memory that cannot be used with DMA will fail, and a rate-limited warning will be printed. Note that io_tlb_nslabs is set to 1, which is the minimal supported value. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
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Linus Torvalds | 7b9dc3f75f |
Power management material for v4.10-rc1
- New cpufreq driver for Broadcom STB SoCs and a Device Tree binding for it (Markus Mayer). - Support for ARM Integrator/AP and Integrator/CP in the generic DT cpufreq driver and elimination of the old Integrator cpufreq driver (Linus Walleij). - Support for the zx296718, r8a7743 and r8a7745, Socionext UniPhier, and PXA SoCs in the the generic DT cpufreq driver (Baoyou Xie, Geert Uytterhoeven, Masahiro Yamada, Robert Jarzmik). - cpufreq core fix to eliminate races that may lead to using inactive policy objects and related cleanups (Rafael Wysocki). - cpufreq schedutil governor update to make it use SCHED_FIFO kernel threads (instead of regular workqueues) for doing delayed work (to reduce the response latency in some cases) and related cleanups (Viresh Kumar). - New cpufreq sysfs attribute for resetting statistics (Markus Mayer). - cpufreq governors fixes and cleanups (Chen Yu, Stratos Karafotis, Viresh Kumar). - Support for using generic cpufreq governors in the intel_pstate driver (Rafael Wysocki). - Support for per-logical-CPU P-state limits and the EPP/EPB (Energy Performance Preference/Energy Performance Bias) knobs in the intel_pstate driver (Srinivas Pandruvada). - New CPU ID for Knights Mill in intel_pstate (Piotr Luc). - intel_pstate driver modification to use the P-state selection algorithm based on CPU load on platforms with the system profile in the ACPI tables set to "mobile" (Srinivas Pandruvada). - intel_pstate driver cleanups (Arnd Bergmann, Rafael Wysocki, Srinivas Pandruvada). - cpufreq powernv driver updates including fast switching support (for the schedutil governor), fixes and cleanus (Akshay Adiga, Andrew Donnellan, Denis Kirjanov). - acpi-cpufreq driver rework to switch it over to the new CPU offline/online state machine (Sebastian Andrzej Siewior). - Assorted cleanups in cpufreq drivers (Wei Yongjun, Prashanth Prakash). - Idle injection rework (to make it use the regular idle path instead of a home-grown custom one) and related powerclamp thermal driver updates (Peter Zijlstra, Jacob Pan, Petr Mladek, Sebastian Andrzej Siewior). - New CPU IDs for Atom Z34xx and Knights Mill in intel_idle (Andy Shevchenko, Piotr Luc). - intel_idle driver cleanups and switch over to using the new CPU offline/online state machine (Anna-Maria Gleixner, Sebastian Andrzej Siewior). - cpuidle DT driver update to support suspend-to-idle properly (Sudeep Holla). - cpuidle core cleanups and misc updates (Daniel Lezcano, Pan Bian, Rafael Wysocki). - Preliminary support for power domains including CPUs in the generic power domains (genpd) framework and related DT bindings (Lina Iyer). - Assorted fixes and cleanups in the generic power domains (genpd) framework (Colin Ian King, Dan Carpenter, Geert Uytterhoeven). - Preliminary support for devices with multiple voltage regulators and related fixes and cleanups in the Operating Performance Points (OPP) library (Viresh Kumar, Masahiro Yamada, Stephen Boyd). - System sleep state selection interface rework to make it easier to support suspend-to-idle as the default system suspend method (Rafael Wysocki). - PM core fixes and cleanups, mostly related to the interactions between the system suspend and runtime PM frameworks (Ulf Hansson, Sahitya Tummala, Tony Lindgren). - Latency tolerance PM QoS framework imorovements (Andrew Lutomirski). - New Knights Mill CPU ID for the Intel RAPL power capping driver (Piotr Luc). - Intel RAPL power capping driver fixes, cleanups and switch over to using the new CPU offline/online state machine (Jacob Pan, Thomas Gleixner, Sebastian Andrzej Siewior). - Fixes and cleanups in the exynos-ppmu, exynos-nocp, rk3399_dmc, rockchip-dfi devfreq drivers and the devfreq core (Axel Lin, Chanwoo Choi, Javier Martinez Canillas, MyungJoo Ham, Viresh Kumar). - Fix for false-positive KASAN warnings during resume from ACPI S3 (suspend-to-RAM) on x86 (Josh Poimboeuf). - Memory map verification during resume from hibernation on x86 to ensure a consistent address space layout (Chen Yu). - Wakeup sources debugging enhancement (Xing Wei). - rockchip-io AVS driver cleanup (Shawn Lin). -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJYTx4+AAoJEILEb/54YlRx9f8P/2SlNHUENW5qh6FtCw00oC2u UqJerQJ2L38UgbgxbE/0VYblma9rFABDWC1eO2xN2XdcdW5UPBKPVvNcOgNe1Clh gjy3RxZXVpmjfzt2kGfsTLEuGnHqwvx51hTUkeA2LwvkOal45xb8ZESmy8opCtiv iG4LwmPHoxdX5Za5nA9ItFKzxyO1EoyNSnBYAVwALDHxmNOfxEcRevfurASt/0M9 brCCZJA0/sZxeL0lBdy8fNQPIBTUfCoTJG/MtmzGrObJ9wMFvEDfXrVEyZiWs/zA AAZ4kQL77enrIKgrLN8e0G6LzTLHoVcvn38Xjf24dKUqhd7ACBhYcnW+jK3+7EAd gjZ8efObQsiuyK/EDLUNw35tt96CHOqfrQCj2tIwRVvk9EekLqAGXdIndTCr2kYW RpefmP5kMljnm/nQFOVLwMEUQMuVkvUE7EgxADy7DoDmepBFC4ICRDWPye70R2kC 0O1Tn2PAQq4Fd1tyI9TYYz0YQQkRoaRb5rfYUSzbRbeCdsphUopp4Vhsiyn6IcnF XnLbg6pRAat82MoS9n4pfO/VCo8vkErKA8tut9G7TDakkrJoEE7l31PdKW0hP3f6 sBo6xXy6WTeivU/o/i8TbM6K4mA37pBaj78ooIkWLgg5fzRaS2+0xSPVy2H9x1m5 LymHcobCK9rSZ1l208Fe =vhxI -----END PGP SIGNATURE----- Merge tag 'pm-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: "Again, cpufreq gets more changes than the other parts this time (one new driver, one old driver less, a bunch of enhancements of the existing code, new CPU IDs, fixes, cleanups) There also are some changes in cpuidle (idle injection rework, a couple of new CPU IDs, online/offline rework in intel_idle, fixes and cleanups), in the generic power domains framework (mostly related to supporting power domains containing CPUs), and in the Operating Performance Points (OPP) library (mostly related to supporting devices with multiple voltage regulators) In addition to that, the system sleep state selection interface is modified to make it easier for distributions with unchanged user space to support suspend-to-idle as the default system suspend method, some issues are fixed in the PM core, the latency tolerance PM QoS framework is improved a bit, the Intel RAPL power capping driver is cleaned up and there are some fixes and cleanups in the devfreq subsystem Specifics: - New cpufreq driver for Broadcom STB SoCs and a Device Tree binding for it (Markus Mayer) - Support for ARM Integrator/AP and Integrator/CP in the generic DT cpufreq driver and elimination of the old Integrator cpufreq driver (Linus Walleij) - Support for the zx296718, r8a7743 and r8a7745, Socionext UniPhier, and PXA SoCs in the the generic DT cpufreq driver (Baoyou Xie, Geert Uytterhoeven, Masahiro Yamada, Robert Jarzmik) - cpufreq core fix to eliminate races that may lead to using inactive policy objects and related cleanups (Rafael Wysocki) - cpufreq schedutil governor update to make it use SCHED_FIFO kernel threads (instead of regular workqueues) for doing delayed work (to reduce the response latency in some cases) and related cleanups (Viresh Kumar) - New cpufreq sysfs attribute for resetting statistics (Markus Mayer) - cpufreq governors fixes and cleanups (Chen Yu, Stratos Karafotis, Viresh Kumar) - Support for using generic cpufreq governors in the intel_pstate driver (Rafael Wysocki) - Support for per-logical-CPU P-state limits and the EPP/EPB (Energy Performance Preference/Energy Performance Bias) knobs in the intel_pstate driver (Srinivas Pandruvada) - New CPU ID for Knights Mill in intel_pstate (Piotr Luc) - intel_pstate driver modification to use the P-state selection algorithm based on CPU load on platforms with the system profile in the ACPI tables set to "mobile" (Srinivas Pandruvada) - intel_pstate driver cleanups (Arnd Bergmann, Rafael Wysocki, Srinivas Pandruvada) - cpufreq powernv driver updates including fast switching support (for the schedutil governor), fixes and cleanus (Akshay Adiga, Andrew Donnellan, Denis Kirjanov) - acpi-cpufreq driver rework to switch it over to the new CPU offline/online state machine (Sebastian Andrzej Siewior) - Assorted cleanups in cpufreq drivers (Wei Yongjun, Prashanth Prakash) - Idle injection rework (to make it use the regular idle path instead of a home-grown custom one) and related powerclamp thermal driver updates (Peter Zijlstra, Jacob Pan, Petr Mladek, Sebastian Andrzej Siewior) - New CPU IDs for Atom Z34xx and Knights Mill in intel_idle (Andy Shevchenko, Piotr Luc) - intel_idle driver cleanups and switch over to using the new CPU offline/online state machine (Anna-Maria Gleixner, Sebastian Andrzej Siewior) - cpuidle DT driver update to support suspend-to-idle properly (Sudeep Holla) - cpuidle core cleanups and misc updates (Daniel Lezcano, Pan Bian, Rafael Wysocki) - Preliminary support for power domains including CPUs in the generic power domains (genpd) framework and related DT bindings (Lina Iyer) - Assorted fixes and cleanups in the generic power domains (genpd) framework (Colin Ian King, Dan Carpenter, Geert Uytterhoeven) - Preliminary support for devices with multiple voltage regulators and related fixes and cleanups in the Operating Performance Points (OPP) library (Viresh Kumar, Masahiro Yamada, Stephen Boyd) - System sleep state selection interface rework to make it easier to support suspend-to-idle as the default system suspend method (Rafael Wysocki) - PM core fixes and cleanups, mostly related to the interactions between the system suspend and runtime PM frameworks (Ulf Hansson, Sahitya Tummala, Tony Lindgren) - Latency tolerance PM QoS framework imorovements (Andrew Lutomirski) - New Knights Mill CPU ID for the Intel RAPL power capping driver (Piotr Luc) - Intel RAPL power capping driver fixes, cleanups and switch over to using the new CPU offline/online state machine (Jacob Pan, Thomas Gleixner, Sebastian Andrzej Siewior) - Fixes and cleanups in the exynos-ppmu, exynos-nocp, rk3399_dmc, rockchip-dfi devfreq drivers and the devfreq core (Axel Lin, Chanwoo Choi, Javier Martinez Canillas, MyungJoo Ham, Viresh Kumar) - Fix for false-positive KASAN warnings during resume from ACPI S3 (suspend-to-RAM) on x86 (Josh Poimboeuf) - Memory map verification during resume from hibernation on x86 to ensure a consistent address space layout (Chen Yu) - Wakeup sources debugging enhancement (Xing Wei) - rockchip-io AVS driver cleanup (Shawn Lin)" * tag 'pm-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (127 commits) devfreq: rk3399_dmc: Don't use OPP structures outside of RCU locks devfreq: rk3399_dmc: Remove dangling rcu_read_unlock() devfreq: exynos: Don't use OPP structures outside of RCU locks Documentation: intel_pstate: Document HWP energy/performance hints cpufreq: intel_pstate: Support for energy performance hints with HWP cpufreq: intel_pstate: Add locking around HWP requests PM / sleep: Print active wakeup sources when blocking on wakeup_count reads PM / core: Fix bug in the error handling of async suspend PM / wakeirq: Fix dedicated wakeirq for drivers not using autosuspend PM / Domains: Fix compatible for domain idle state PM / OPP: Don't WARN on multiple calls to dev_pm_opp_set_regulators() PM / OPP: Allow platform specific custom set_opp() callbacks PM / OPP: Separate out _generic_set_opp() PM / OPP: Add infrastructure to manage multiple regulators PM / OPP: Pass struct dev_pm_opp_supply to _set_opp_voltage() PM / OPP: Manage supply's voltage/current in a separate structure PM / OPP: Don't use OPP structure outside of rcu protected section PM / OPP: Reword binding supporting multiple regulators per device PM / OPP: Fix incorrect cpu-supply property in binding cpuidle: Add a kerneldoc comment to cpuidle_use_deepest_state() .. |
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Linus Torvalds | e7aa8c2eb1 |
These are the documentation changes for 4.10.
It's another busy cycle for the docs tree, as the sphinx conversion continues. Highlights include: - Further work on PDF output, which remains a bit of a pain but should be more solid now. - Five more DocBook template files converted to Sphinx. Only 27 to go... Lots of plain-text files have also been converted and integrated. - Images in binary formats have been replaced with more source-friendly versions. - Various bits of organizational work, including the renaming of various files discussed at the kernel summit. - New documentation for the device_link mechanism. ...and, of course, lots of typo fixes and small updates. -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJYTbl7AAoJEI3ONVYwIuV63NIP/REwzThnGWFJMRSuq8Ieq2r9 sFSQsaGTGlhyKiDoEooo+SO/Za3uTonjK+e7WZg8mhdiEdamta5aociU/71C1Yy/ T9ur0FhcGblrvZ1NidSDvCLwuECZOMMei7mgLZ9a+KCpc4ANqqTVZSUm1blKcqhF XelhVXxBa0ar35l/pVzyCxkdNXRWXv+MJZE8hp5XAdTdr11DS7UY9zrZdH31axtf BZlbYJrvB8WPydU6myTjRpirA17Hu7uU64MsL3bNIEiRQ+nVghEzQC8uxeUCvfVx r0H5AgGGQeir+e8GEv2T20SPZ+dumXs+y/HehKNb3jS3gV0mo+pKPeUhwLIxr+Zh QY64gf+jYf5ISHwAJRnU0Ima72ehObzSbx9Dko10nhq2OvbR5f83gjz9t9jKYFU7 RDowICA8lwqyRbHRoVfyoW8CpVhWFpMFu3yNeJMckeTish3m7ANqzaWslbsqIP5G zxgFMIrVVSbeae+sUeygtEJAnWI09aZ4tuaUXYtGWwu6ikC/3aV6DryP4bthG2LF A19uV4nMrLuuh8g2wiTHHjMfjYRwvSn+f9yaolwJhwyNDXQzRPy+ZJ3W/6olOkXC bAxTmVRCW5GA/fmSrfXmW1KbnxlWfP2C62hzZQ09UHxzTHdR97oFLDQdZhKo1uwf pmSJR0hVeRUmA4uw6+Su =A0EV -----END PGP SIGNATURE----- Merge tag 'docs-4.10' of git://git.lwn.net/linux Pull documentation update from Jonathan Corbet: "These are the documentation changes for 4.10. It's another busy cycle for the docs tree, as the sphinx conversion continues. Highlights include: - Further work on PDF output, which remains a bit of a pain but should be more solid now. - Five more DocBook template files converted to Sphinx. Only 27 to go... Lots of plain-text files have also been converted and integrated. - Images in binary formats have been replaced with more source-friendly versions. - Various bits of organizational work, including the renaming of various files discussed at the kernel summit. - New documentation for the device_link mechanism. ... and, of course, lots of typo fixes and small updates" * tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits) dma-buf: Extract dma-buf.rst Update Documentation/00-INDEX docs: 00-INDEX: document directories/files with no docs docs: 00-INDEX: remove non-existing entries docs: 00-INDEX: add missing entries for documentation files/dirs docs: 00-INDEX: consolidate process/ and admin-guide/ description scripts: add a script to check if Documentation/00-INDEX is sane Docs: change sh -> awk in REPORTING-BUGS Documentation/core-api/device_link: Add initial documentation core-api: remove an unexpected unident ppc/idle: Add documentation for powersave=off Doc: Correct typo, "Introdution" => "Introduction" Documentation/atomic_ops.txt: convert to ReST markup Documentation/local_ops.txt: convert to ReST markup Documentation/assoc_array.txt: convert to ReST markup docs-rst: parse-headers.pl: cleanup the documentation docs-rst: fix media cleandocs target docs-rst: media/Makefile: reorganize the rules docs-rst: media: build SVG from graphviz files docs-rst: replace bayer.png by a SVG image ... |
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Balbir Singh | c3cbd075fc |
ppc/idle: Add documentation for powersave=off
Update kernel-parameters.txt to add Documentation for powersave=off. Signed-off-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Jani Nikula | e52347bd66 |
Documentation/admin-guide: split the kernel parameter list to a separate file
Include the literal kernel parameter list from a separate file. This helps the pdf build. Signed-off-by: Jani Nikula <jani.nikula@intel.com> |