- 06 1月, 2018 1 次提交
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由 Helge Deller 提交于
Add qemu idle sleep support when running under qemu with SeaBIOS PDC firmware. Like the power architecture we use the "or" assembler instructions, which translate to nops on real hardware, to indicate that qemu shall idle sleep. Signed-off-by: NHelge Deller <deller@gmx.de> Cc: Richard Henderson <rth@twiddle.net> CC: stable@vger.kernel.org # v4.9+
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- 03 1月, 2018 5 次提交
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由 Helge Deller 提交于
Qemu for PARISC reported on a 32bit SMP parisc kernel strange failures about "Not-handled unaligned insn 0x0e8011d6 and 0x0c2011c9." Those opcodes evaluate to the ldcw() assembly instruction which requires (on 32bit) an alignment of 16 bytes to ensure atomicity. As it turns out, qemu is correct and in our assembly code in entry.S and pacache.S we don't pay attention to the required alignment. This patch fixes the problem by aligning the lock offset in assembly code in the same manner as we do in our C-code. Signed-off-by: NHelge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> # v4.0+
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由 Helge Deller 提交于
Fixes: ad67b74d ("printk: hash addresses printed with %p") Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
Fixes: ad67b74d ("printk: hash addresses printed with %p") Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
Fixes: ad67b74d ("printk: hash addresses printed with %p") Signed-off-by: NHelge Deller <deller@gmx.de>
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由 Helge Deller 提交于
Fixes: ad67b74d ("printk: hash addresses printed with %p") Signed-off-by: NHelge Deller <deller@gmx.de>
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- 01 1月, 2018 16 次提交
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由 Linus Torvalds 提交于
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull x86 fixes from Thomas Gleixner: "A couple of fixlets for x86: - Fix the ESPFIX double fault handling for 5-level pagetables - Fix the commandline parsing for 'apic=' on 32bit systems and update documentation - Make zombie stack traces reliable - Fix kexec with stack canary - Fix the delivery mode for APICs which was missed when the x86 vector management was converted to single target delivery. Caused a regression due to the broken hardware which ignores affinity settings in lowest prio delivery mode. - Unbreak modules when AMD memory encryption is enabled - Remove an unused parameter of prepare_switch_to" * 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/apic: Switch all APICs to Fixed delivery mode x86/apic: Update the 'apic=' description of setting APIC driver x86/apic: Avoid wrong warning when parsing 'apic=' in X86-32 case x86-32: Fix kexec with stack canary (CONFIG_CC_STACKPROTECTOR) x86: Remove unused parameter of prepare_switch_to x86/stacktrace: Make zombie stack traces reliable x86/mm: Unbreak modules that use the DMA API x86/build: Make isoimage work on Debian x86/espfix/64: Fix espfix double-fault handling on 5-level systems
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull x86 page table isolation fixes from Thomas Gleixner: "Four patches addressing the PTI fallout as discussed and debugged yesterday: - Remove stale and pointless TLB flush invocations from the hotplug code - Remove stale preempt_disable/enable from __native_flush_tlb() - Plug the memory leak in the write_ldt() error path" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/ldt: Make LDT pgtable free conditional x86/ldt: Plug memory leak in error path x86/mm: Remove preempt_disable/enable() from __native_flush_tlb() x86/smpboot: Remove stale TLB flush invocations
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull timer fixes from Thomas Gleixner: "A pile of fixes for long standing issues with the timer wheel and the NOHZ code: - Prevent timer base confusion accross the nohz switch, which can cause unlocked access and data corruption - Reinitialize the stale base clock on cpu hotplug to prevent subtle side effects including rollovers on 32bit - Prevent an interrupt storm when the timer softirq is already pending caused by tick_nohz_stop_sched_tick() - Move the timer start tracepoint to a place where it actually makes sense - Add documentation to timerqueue functions as they caused confusion several times now" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: timerqueue: Document return values of timerqueue_add/del() timers: Invoke timer_start_debug() where it makes sense nohz: Prevent a timer interrupt storm in tick_nohz_stop_sched_tick() timers: Reinitialize per cpu bases on hotplug timers: Use deferrable base independent of base::nohz_active
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull smp fixlet from Thomas Gleixner: "A trivial build warning fix for newer compilers" * 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: cpu/hotplug: Move inline keyword at the beginning of declaration
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull scheduler fixes from Thomas Gleixner: "Three patches addressing the fallout of the CPU_ISOLATION changes especially with NO_HZ_FULL plus documentation of boot parameter dependency" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/isolation: Document boot parameters dependency on CONFIG_CPU_ISOLATION=y sched/isolation: Enable CONFIG_CPU_ISOLATION=y by default sched/isolation: Make CONFIG_NO_HZ_FULL select CONFIG_CPU_ISOLATION
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull perf fixes from Thomas Gleixner: - plug a memory leak in the intel pmu init code - clang fixes - tooling fix to avoid including kernel headers - a fix for jvmti to generate correct debug information for inlined code - replace backtick with a regular shell function - fix the build in hardened environments * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel: Plug memory leak in intel_pmu_init() x86/asm: Allow again using asm.h when building for the 'bpf' clang target tools arch s390: Do not include header files from the kernel sources perf jvmti: Generate correct debug information for inlined code perf tools: Fix up build in hardened environments perf tools: Use shell function for perl cflags retrieval
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull irq fixes from Thomas Gleixner: "A rather large update after the kaisered maintainer finally found time to handle regression reports. - The larger part addresses a regression caused by the x86 vector management rework. The reservation based model does not work reliably for MSI interrupts, if they cannot be masked (yes, yet another hw engineering trainwreck). The reason is that the reservation mode assigns a dummy vector when the interrupt is allocated and switches to a real vector when the interrupt is requested. If the MSI entry cannot be masked then the initialization might raise an interrupt before the interrupt is requested, which ends up as spurious interrupt and causes device malfunction and worse. The fix is to exclude MSI interrupts which do not support masking from reservation mode and assign a real vector right away. - Extend the extra lockdep class setup for nested interrupts with a class for the recently added irq_desc::request_mutex so lockdep can differeniate and does not emit false positive warnings. - A ratelimit guard for the bad irq printout so in case a bad irq comes back immediately the system does not drown in dmesg spam" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq/msi, x86/vector: Prevent reservation mode for non maskable MSI genirq/irqdomain: Rename early argument of irq_domain_activate_irq() x86/vector: Use IRQD_CAN_RESERVE flag genirq: Introduce IRQD_CAN_RESERVE flag genirq/msi: Handle reactivation only on success gpio: brcmstb: Make really use of the new lockdep class genirq: Guard handle_bad_irq log messages kernel/irq: Extend lockdep class for request mutex
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull objtool fixes from Thomas Gleixner: "Three fixlets for objtool: - Address two segfaults related to missing parameter and clang objects - Make it compile clean with clang" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: objtool: Fix seg fault with clang-compiled objects objtool: Fix seg fault caused by missing parameter objtool: Fix Clang enum conversion warning
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc由 Linus Torvalds 提交于
Pull char/misc fixes from Greg KH: "Here are six small fixes of some of the char/misc drivers that have been sent in to resolve reported issues. Nothing major, a binder use-after-free fix, some thunderbolt bugfixes, a hyper-v bugfix, and an nvmem driver fix. All of these have been in linux-next with no reported issues for a while" * tag 'char-misc-4.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: nvmem: meson-mx-efuse: fix reading from an offset other than 0 binder: fix proc->files use-after-free vmbus: unregister device_obj->channels_kset thunderbolt: Mask ring interrupt properly when polling starts MAINTAINERS: Add thunderbolt.rst to the Thunderbolt driver entry thunderbolt: Make pathname to force_power shorter
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由 Linus Torvalds 提交于
Merge tag 'driver-core-4.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core fixes from Greg KH: "Here are two driver core fixes for 4.15-rc6, resolving some reported issues. The first is a cacheinfo fix for DT based systems to resolve a reported issue that has been around for a while, and the other is to resolve a regression in the kobject uevent code that showed up in 4.15-rc1. Both have been in linux-next for a while with no reported issues" * tag 'driver-core-4.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: kobject: fix suppressing modalias in uevents delivered over netlink drivers: base: cacheinfo: fix cache type for non-architected system cache
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging由 Linus Torvalds 提交于
Pull staging fixes from Greg KH: "Here are three staging driver fixes for 4.15-rc6 The first resolves a bug in the lustre driver that came about due to a broken cleanup patch, due to crazy list usage in that codebase. The remaining two are ion driver fixes, finally getting the CMA interaction to work properly, resolving two regressions in that area of the code. All have been in linux-next with no reported issues for a while" * tag 'staging-4.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: staging: android: ion: Fix dma direction for dma_sync_sg_for_cpu/device staging: ion: Fix ion_cma_heap allocations staging: lustre: lnet: Fix recent breakage from list_for_each conversion
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty由 Linus Torvalds 提交于
Pull TTY fix from Greg KH: "Here is a single tty fix for a reported issue that you wrote the patch for :) It's been in linux-next for a week or so with no reported issues" * tag 'tty-4.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: n_tty: fix EXTPROC vs ICANON interaction with TIOCINQ (aka FIONREAD)
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb由 Linus Torvalds 提交于
Pull USB/PHY fixes from Greg KH: "Here are a number of small USB and PHY driver fixes for 4.15-rc6. Nothing major, but there are a number of regression fixes in here that resolve issues that have been reported a bunch. There are also the usual xhci fixes as well as a number of new usb serial device ids. All of these have been in linux-next for a while with no reported issues" * tag 'usb-4.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: usb: xhci: Add XHCI_TRUST_TX_LENGTH for Renesas uPD720201 xhci: Fix use-after-free in xhci debugfs xhci: Fix xhci debugfs NULL pointer dereference in resume from hibernate USB: serial: ftdi_sio: add id for Airbus DS P8GR usb: Add device quirk for Logitech HD Pro Webcam C925e usb: add RESET_RESUME for ELSA MicroLink 56K usbip: fix usbip bind writing random string after command in match_busid usbip: stub_rx: fix static checker warning on unnecessary checks usbip: prevent leaking socket pointer address in messages usbip: stub: stop printing kernel pointer addresses in messages usbip: vhci: stop printing kernel pointer addresses in messages USB: Fix off by one in type-specific length check of BOS SSP capability USB: serial: option: adding support for YUGA CLM920-NC5 phy: rcar-gen3-usb2: select USB_COMMON phy: rockchip-typec: add pm_runtime_disable in err case phy: cpcap-usb: Fix platform_get_irq_byname's error checking. phy: tegra: fix device-tree node lookups USB: serial: qcserial: add Sierra Wireless EM7565 USB: serial: option: add support for Telit ME910 PID 0x1101 USB: chipidea: msm: fix ulpi-node lookup
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由 Adam Borowski 提交于
The blackfin architecture has seen no maintainer action of any kind since April 2015. No new code, no pull requests, no acks to patches, no response to mails, nothing. The web site has an expired certificate (expiration Sep 2017, issued in 2013), the mailing list sees no answers either, with one exception: https://sourceforge.net/p/adi-buildroot/mailman/adi-buildroot-devel/ > > Steven is no longer working on this for ADI. Acked by me if this works. Thanks. > > Best regards, > Aaron Wu > Analog Devices Inc. But, Aaron doesn't seem to respond to queries either. Signed-off-by: NAdam Borowski <kilobyte@angband.pl> Acked-by: NLinus Walleij <linus.walleij@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc由 Linus Torvalds 提交于
Pull sparc bugfix from David Miller. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc64: repair calling incorrect hweight function from stubs
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- 31 12月, 2017 9 次提交
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由 Thomas Gleixner 提交于
Andy prefers to be paranoid about the pagetable free in the error path of write_ldt(). Make it conditional and warn whenever the installment of a secondary LDT fails. Requested-by: NAndy Lutomirski <luto@amacapital.net> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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由 Thomas Gleixner 提交于
The error path in write_ldt() tries to free 'old_ldt' instead of the newly allocated 'new_ldt', resulting in a memory leak. It also misses to clean up a half populated LDT pagetable, which is not a leak as it gets cleaned up when the process exits. Free both the potentially half populated LDT pagetable and the newly allocated LDT struct. This can be done unconditionally because once an LDT is mapped subsequent maps will succeed, because the PTE page is already populated and the two LDTs fit into that single page. Reported-by: NMathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Linus Torvalds <torvalds@linuxfoundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: f55f0501 ("x86/pti: Put the LDT in its own PGD if PTI is on") Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1712311121340.1899@nanosSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Thomas Gleixner 提交于
The preempt_disable/enable() pair in __native_flush_tlb() was added in commit: 5cf0791d ("x86/mm: Disable preemption during CR3 read+write") ... to protect the UP variant of flush_tlb_mm_range(). That preempt_disable/enable() pair should have been added to the UP variant of flush_tlb_mm_range() instead. The UP variant was removed with commit: ce4a4e56 ("x86/mm: Remove the UP asm/tlbflush.h code, always use the (formerly) SMP code") ... but the preempt_disable/enable() pair stayed around. The latest change to __native_flush_tlb() in commit: 6fd166aa ("x86/mm: Use/Fix PCID to optimize user/kernel switches") ... added an access to a per CPU variable outside the preempt disabled regions, which makes no sense at all. __native_flush_tlb() must always be called with at least preemption disabled. Remove the preempt_disable/enable() pair and add a WARN_ON_ONCE() to catch bad callers independent of the smp_processor_id() debugging. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: <stable@vger.kernel.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Linus Torvalds <torvalds@linuxfoundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20171230211829.679325424@linutronix.deSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Thomas Gleixner 提交于
smpboot_setup_warm_reset_vector() and smpboot_restore_warm_reset_vector() invoke local_flush_tlb() for no obvious reason. Digging in history revealed that the original code in the 2.1 era added those because the code manipulated a swapper_pg_dir pagetable entry. The pagetable manipulation was removed long ago in the 2.3 timeframe, but the TLB flush invocations stayed around forever. Remove them along with the pointless pr_debug()s which come from the same 2.1 change. Reported-by: NDominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: <stable@vger.kernel.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Linus Torvalds <torvalds@linuxfoundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20171230211829.586548655@linutronix.deSigned-off-by: NIngo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi由 Linus Torvalds 提交于
Pull SCSI fixes from James Bottomley: "Two simple fixes, both of which cause I/O hangs. The storvsc one is from the hyper-v which can hang under certain hot add/remove conditions and the other is generally, where removing a target and a device in close proximity can result in the release method being executed twice (and subsequent list and other corruption and an eventual panic)" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: storvsc: Fix scsi_cmd error assignments in storvsc_handle_error scsi: core: check for device state in __scsi_remove_target()
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由 Simon Ser 提交于
Fix a seg fault which happens when an input file provided to 'objtool orc generate' doesn't have a '.shstrtab' section (for instance, object files produced by clang don't have this section). Signed-off-by: NSimon Ser <contact@emersion.fr> Signed-off-by: NJosh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/c0f2231683e9bed40fac1f13ce2c33b8389854bc.1514666459.git.jpoimboe@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Simon Ser 提交于
Fix a seg fault when no parameter is provided to 'objtool orc'. Signed-off-by: NSimon Ser <contact@emersion.fr> Signed-off-by: NJosh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/9172803ec7ebb72535bcd0b7f966ae96d515968e.1514666459.git.jpoimboe@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid由 Linus Torvalds 提交于
Pull HID fixes from Jiri Kosina: - two cosmetic fixes from Daniel Axtens and Hans de Goede - fix for I2C command mismatch fix for cp2112 driver from Eudean Sun * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: core: lower log level for unknown main item tags to warnings HID: holtekff: move MODULE_* parameters out of #ifdef block HID: cp2112: Fix I2C_BLOCK_DATA transactions
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由 Linus Torvalds 提交于
It appears that hardened gentoo enables "-fstack-check" by default for gcc. That doesn't work _at_all_ for the kernel, because the kernel stack doesn't act like a user stack at all: it's much smaller, and it doesn't auto-expand on use. So the extra "probe one page below the stack" code generated by -fstack-check just breaks the kernel in horrible ways, causing infinite double faults etc. [ I have to say, that the particular code gcc generates looks very stupid even for user space where it works, but that's a separate issue. ] Reported-and-tested-by: NAlexander Tsoy <alexander@tsoy.me> Reported-and-tested-by: NToralf Förster <toralf.foerster@gmx.de> Cc: stable@kernel.org Cc: Dave Hansen <dave.hansen@intel.com> Cc: Jiri Kosina <jikos@kernel.org> Cc: Andy Lutomirski <luto@amacapital.net> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 30 12月, 2017 9 次提交
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull x86 page table isolation updates from Thomas Gleixner: "This is the final set of enabling page table isolation on x86: - Infrastructure patches for handling the extra page tables. - Patches which map the various bits and pieces which are required to get in and out of user space into the user space visible page tables. - The required changes to have CR3 switching in the entry/exit code. - Optimizations for the CR3 switching along with documentation how the ASID/PCID mechanism works. - Updates to dump pagetables to cover the user space page tables for W+X scans and extra debugfs files to analyze both the kernel and the user space visible page tables The whole functionality is compile time controlled via a config switch and can be turned on/off on the command line as well" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits) x86/ldt: Make the LDT mapping RO x86/mm/dump_pagetables: Allow dumping current pagetables x86/mm/dump_pagetables: Check user space page table for WX pages x86/mm/dump_pagetables: Add page table directory to the debugfs VFS hierarchy x86/mm/pti: Add Kconfig x86/dumpstack: Indicate in Oops whether PTI is configured and enabled x86/mm: Clarify the whole ASID/kernel PCID/user PCID naming x86/mm: Use INVPCID for __native_flush_tlb_single() x86/mm: Optimize RESTORE_CR3 x86/mm: Use/Fix PCID to optimize user/kernel switches x86/mm: Abstract switching CR3 x86/mm: Allow flushing for future ASID switches x86/pti: Map the vsyscall page if needed x86/pti: Put the LDT in its own PGD if PTI is on x86/mm/64: Make a full PGD-entry size hole in the memory map x86/events/intel/ds: Map debug buffers in cpu_entry_area x86/cpu_entry_area: Add debugstore entries to cpu_entry_area x86/mm/pti: Map ESPFIX into user space x86/mm/pti: Share entry text PMD x86/entry: Align entry text section to PMD boundary ...
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由 Thomas Gleixner 提交于
The return values of timerqueue_add/del() are not documented in the kernel doc comment. Add proper documentation. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: rt@linutronix.de Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Anna-Maria Gleixner <anna-maria@linutronix.de> Link: https://lkml.kernel.org/r/20171222145337.872681338@linutronix.de
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由 Thomas Gleixner 提交于
The timer start debug function is called before the proper timer base is set. As a consequence the trace data contains the stale CPU and flags values. Call the debug function after setting the new base and flags. Fixes: 500462a9 ("timers: Switch to a non-cascading wheel") Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: stable@vger.kernel.org Cc: rt@linutronix.de Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Anna-Maria Gleixner <anna-maria@linutronix.de> Link: https://lkml.kernel.org/r/20171222145337.792907137@linutronix.de
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由 Thomas Gleixner 提交于
The conditions in irq_exit() to invoke tick_nohz_irq_exit() which subsequently invokes tick_nohz_stop_sched_tick() are: if ((idle_cpu(cpu) && !need_resched()) || tick_nohz_full_cpu(cpu)) If need_resched() is not set, but a timer softirq is pending then this is an indication that the softirq code punted and delegated the execution to softirqd. need_resched() is not true because the current interrupted task takes precedence over softirqd. Invoking tick_nohz_irq_exit() in this case can cause an endless loop of timer interrupts because the timer wheel contains an expired timer, but softirqs are not yet executed. So it returns an immediate expiry request, which causes the timer to fire immediately again. Lather, rinse and repeat.... Prevent that by adding a check for a pending timer soft interrupt to the conditions in tick_nohz_stop_sched_tick() which avoid calling get_next_timer_interrupt(). That keeps the tick sched timer on the tick and prevents a repetitive programming of an already expired timer. Reported-by: NSebastian Siewior <bigeasy@linutronix.d> Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Acked-by: NFrederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Anna-Maria Gleixner <anna-maria@linutronix.de> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1712272156050.2431@nanos
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由 Thomas Gleixner 提交于
The timer wheel bases are not (re)initialized on CPU hotplug. That leaves them with a potentially stale clk and next_expiry valuem, which can cause trouble then the CPU is plugged. Add a prepare callback which forwards the clock, sets next_expiry to far in the future and reset the control flags to a known state. Set base->must_forward_clk so the first timer which is queued will try to forward the clock to current jiffies. Fixes: 500462a9 ("timers: Switch to a non-cascading wheel") Reported-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Anna-Maria Gleixner <anna-maria@linutronix.de> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1712272152200.2431@nanos
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由 Anna-Maria Gleixner 提交于
During boot and before base::nohz_active is set in the timer bases, deferrable timers are enqueued into the standard timer base. This works correctly as long as base::nohz_active is false. Once it base::nohz_active is set and a timer which was enqueued before that is accessed the lock selector code choses the lock of the deferred base. This causes unlocked access to the standard base and in case the timer is removed it does not clear the pending flag in the standard base bitmap which causes get_next_timer_interrupt() to return bogus values. To prevent that, the deferrable timers must be enqueued in the deferrable base, even when base::nohz_active is not set. Those deferrable timers also need to be expired unconditional. Fixes: 500462a9 ("timers: Switch to a non-cascading wheel") Signed-off-by: NAnna-Maria Gleixner <anna-maria@linutronix.de> Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Reviewed-by: NFrederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: stable@vger.kernel.org Cc: rt@linutronix.de Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Link: https://lkml.kernel.org/r/20171222145337.633328378@linutronix.de
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由 Thomas Gleixner 提交于
The new reservation mode for interrupts assigns a dummy vector when the interrupt is allocated and assigns a real vector when the interrupt is requested. The reservation mode prevents vector pressure when devices with a large amount of queues/interrupts are initialized, but only a minimal subset of those queues/interrupts is actually used. This mode has an issue with MSI interrupts which cannot be masked. If the driver is not careful or the hardware emits an interrupt before the device irq is requestd by the driver then the interrupt ends up on the dummy vector as a spurious interrupt which can cause malfunction of the device or in the worst case a lockup of the machine. Change the logic for the reservation mode so that the early activation of MSI interrupts checks whether: - the device is a PCI/MSI device - the reservation mode of the underlying irqdomain is activated - PCI/MSI masking is globally enabled - the PCI/MSI device uses either MSI-X, which supports masking, or MSI with the maskbit supported. If one of those conditions is false, then clear the reservation mode flag in the irq data of the interrupt and invoke irq_domain_activate_irq() with the reserve argument cleared. In the x86 vector code, clear the can_reserve flag in the vector allocation data so a subsequent free_irq() won't create the same situation again. The interrupt stays assigned to a real vector until pci_disable_msi() is invoked and all allocations are undone. Fixes: 4900be83 ("x86/vector/msi: Switch to global reservation mode") Reported-by: NAlexandru Chirvasitu <achirvasub@gmail.com> Reported-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Tested-by: NAlexandru Chirvasitu <achirvasub@gmail.com> Tested-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Dou Liyang <douly.fnst@cn.fujitsu.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: Mikael Pettersson <mikpelinux@gmail.com> Cc: Josh Poulson <jopoulso@microsoft.com> Cc: Mihai Costache <v-micos@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-pci@vger.kernel.org Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Saeed Mahameed <saeedm@mellanox.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: devel@linuxdriverproject.org Cc: KY Srinivasan <kys@microsoft.com> Cc: Alan Cox <alan@linux.intel.com> Cc: Sakari Ailus <sakari.ailus@intel.com>, Cc: linux-media@vger.kernel.org Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1712291406420.1899@nanos Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1712291409460.1899@nanos
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由 Thomas Gleixner 提交于
The 'early' argument of irq_domain_activate_irq() is actually used to denote reservation mode. To avoid confusion, rename it before abuse happens. No functional change. Fixes: 72491643 ("genirq/irqdomain: Update irq_domain_ops.activate() signature") Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Alexandru Chirvasitu <achirvasub@gmail.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Dou Liyang <douly.fnst@cn.fujitsu.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: Mikael Pettersson <mikpelinux@gmail.com> Cc: Josh Poulson <jopoulso@microsoft.com> Cc: Mihai Costache <v-micos@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-pci@vger.kernel.org Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Saeed Mahameed <saeedm@mellanox.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: devel@linuxdriverproject.org Cc: KY Srinivasan <kys@microsoft.com> Cc: Alan Cox <alan@linux.intel.com> Cc: Sakari Ailus <sakari.ailus@intel.com>, Cc: linux-media@vger.kernel.org
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由 Thomas Gleixner 提交于
Set the new CAN_RESERVE flag when the initial reservation for an interrupt happens. The flag is used in a subsequent patch to disable reservation mode for a certain class of MSI devices. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Tested-by: NAlexandru Chirvasitu <achirvasub@gmail.com> Tested-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Dou Liyang <douly.fnst@cn.fujitsu.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: Mikael Pettersson <mikpelinux@gmail.com> Cc: Josh Poulson <jopoulso@microsoft.com> Cc: Mihai Costache <v-micos@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-pci@vger.kernel.org Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Saeed Mahameed <saeedm@mellanox.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: devel@linuxdriverproject.org Cc: KY Srinivasan <kys@microsoft.com> Cc: Alan Cox <alan@linux.intel.com> Cc: Sakari Ailus <sakari.ailus@intel.com>, Cc: linux-media@vger.kernel.org
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