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2019-01-04drivers/perf: hisi: Fixup one DDRC PMU register offsetShaokun Zhang
For DDRC PMU, each PMU counter is fixed-purpose. There is a mismatch between perf list and driver definition on rw_chg event. # perf list | grep chg hisi_sccl1_ddrc0/rnk_chg/ [Kernel PMU event] hisi_sccl1_ddrc0/rw_chg/ [Kernel PMU event] But the register offset of rw_chg event is not defined in the driver, meanwhile bnk_chg register offset is mis-defined, let's fixup it. Fixes: 904dcf03f086 ("perf: hisi: Add support for HiSilicon SoC DDRC PMU driver") Cc: stable@vger.kernel.org Cc: John Garry <john.garry@huawei.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Reported-by: Weijian Huang <huangweijian4@hisilicon.com> Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-12-06drivers/perf: Add Cavium ThunderX2 SoC UNCORE PMU driverKulkarni, Ganapatrao
This patch adds a perf driver for the PMU UNCORE devices DDR4 Memory Controller(DMC) and Level 3 Cache(L3C). Each PMU supports up to 4 counters. All counters lack overflow interrupt and are sampled periodically. Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com> [will: consistent enum cpuhp_state naming] Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-11-29perf: arm_spe: handle devm_kasprintf() failureNicholas Mc Guire
devm_kasprintf() may return NULL on failure of internal allocation thus the assignment to 'name' is not safe if unchecked. If NULL is passed in for name then perf_pmu_register() would not fail but rather silently jump to skip_type which is not the intent here. As perf_pmu_register() may also return -ENOMEM returning -ENOMEM in the (unlikely) failure case of devm_kasprintf() should be fine here as well. Acked-by: Mark Rutland <mark.rutland@arm.com> Fixes: d5d9696b0380 ("drivers/perf: Add support for ARMv8.2 Statistical Profiling Extension") Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> [will: reworded error message] Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-11-21drivers/perf: xgene: Add CPU hotplug supportHoan Tran
If the CPU assigned to the xgene PMU is taken offline, then subsequent perf invocations on the PMU will fail: # echo 0 > /sys/devices/system/cpu/cpu0/online # perf stat -a -e l3c0/cycle-count/,l3c0/write/ sleep 1 Error: The sys_perf_event_open() syscall returned with 19 (No such device) for event (l3c0/cycle-count/). /bin/dmesg may provide additional information. No CONFIG_PERF_EVENTS=y kernel support configured? This patch implements a hotplug notifier in the xgene PMU driver so that the PMU context is migrated to another online CPU should its assigned CPU disappear. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Hoan Tran <hoan.tran@amperecomputing.com> [will: Made naming of new cpuhp_state enum entry consistent] Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-11-21perf: arm_spe: Enable automatic DT loadingJeremy Linton
When built as a module, the spe driver isn't automatically loaded on DT systems. Add the MODULE_DEVICE_TABLE entry. Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-10-22Merge tag 'arm64-upstream' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Catalin Marinas: "Apart from some new arm64 features and clean-ups, this also contains the core mmu_gather changes for tracking the levels of the page table being cleared and a minor update to the generic compat_sys_sigaltstack() introducing COMPAT_SIGMINSKSZ. Summary: - Core mmu_gather changes which allow tracking the levels of page-table being cleared together with the arm64 low-level flushing routines - Support for the new ARMv8.5 PSTATE.SSBS bit which can be used to mitigate Spectre-v4 dynamically without trapping to EL3 firmware - Introduce COMPAT_SIGMINSTKSZ for use in compat_sys_sigaltstack - Optimise emulation of MRS instructions to ID_* registers on ARMv8.4 - Support for Common Not Private (CnP) translations allowing threads of the same CPU to share the TLB entries - Accelerated crc32 routines - Move swapper_pg_dir to the rodata section - Trap WFI instruction executed in user space - ARM erratum 1188874 workaround (arch_timer) - Miscellaneous fixes and clean-ups" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (78 commits) arm64: KVM: Guests can skip __install_bp_hardening_cb()s HYP work arm64: cpufeature: Trap CTR_EL0 access only where it is necessary arm64: cpufeature: Fix handling of CTR_EL0.IDC field arm64: cpufeature: ctr: Fix cpu capability check for late CPUs Documentation/arm64: HugeTLB page implementation arm64: mm: Use __pa_symbol() for set_swapper_pgd() arm64: Add silicon-errata.txt entry for ARM erratum 1188873 Revert "arm64: uaccess: implement unsafe accessors" arm64: mm: Drop the unused cpu parameter MAINTAINERS: fix bad sdei paths arm64: mm: Use #ifdef for the __PAGETABLE_P?D_FOLDED defines arm64: Fix typo in a comment in arch/arm64/mm/kasan_init.c arm64: xen: Use existing helper to check interrupt status arm64: Use daifflag_restore after bp_hardening arm64: daifflags: Use irqflags functions for daifflags arm64: arch_timer: avoid unused function warning arm64: Trap WFI executed in userspace arm64: docs: Document SSBS HWCAP arm64: docs: Fix typos in ELF hwcaps arm64/kprobes: remove an extra semicolon in arch_prepare_kprobe ...
2018-10-12arm64: perf: Reject stand-alone CHAIN events for PMUv3Will Deacon
It doesn't make sense for a perf event to be configured as a CHAIN event in isolation, so extend the arm_pmu structure with a ->filter_match() function to allow the backend PMU implementation to reject CHAIN events early. Cc: <stable@vger.kernel.org> Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-10-01perf: Convert to using %pOFn instead of device_node.nameRob Herring
In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-arm-kernel@lists.infradead.org Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2018-08-18Merge tag 'char-misc-4.19-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver updates from Greg KH: "Here is the bit set of char/misc drivers for 4.19-rc1 There is a lot here, much more than normal, seems like everyone is writing new driver subsystems these days... Anyway, major things here are: - new FSI driver subsystem, yet-another-powerpc low-level hardware bus - gnss, finally an in-kernel GPS subsystem to try to tame all of the crazy out-of-tree drivers that have been floating around for years, combined with some really hacky userspace implementations. This is only for GNSS receivers, but you have to start somewhere, and this is great to see. Other than that, there are new slimbus drivers, new coresight drivers, new fpga drivers, and loads of DT bindings for all of these and existing drivers. All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (255 commits) android: binder: Rate-limit debug and userspace triggered err msgs fsi: sbefifo: Bump max command length fsi: scom: Fix NULL dereference misc: mic: SCIF Fix scif_get_new_port() error handling misc: cxl: changed asterisk position genwqe: card_base: Use true and false for boolean values misc: eeprom: assignment outside the if statement uio: potential double frees if __uio_register_device() fails eeprom: idt_89hpesx: clean up an error pointer vs NULL inconsistency misc: ti-st: Fix memory leak in the error path of probe() android: binder: Show extra_buffers_size in trace firmware: vpd: Fix section enabled flag on vpd_section_destroy platform: goldfish: Retire pdev_bus goldfish: Use dedicated macros instead of manual bit shifting goldfish: Add missing includes to goldfish.h mux: adgs1408: new driver for Analog Devices ADGS1408/1409 mux dt-bindings: mux: add adi,adgs1408 Drivers: hv: vmbus: Cleanup synic memory free path Drivers: hv: vmbus: Remove use of slow_virt_to_phys() Drivers: hv: vmbus: Reset the channel callback in vmbus_onoffer_rescind() ...
2018-07-27Merge branch 'for-next/perf' of ↵Will Deacon
git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into aarch64/for-next/core Pull in arm perf updates, including support for 64-bit (chained) event counters and some non-critical fixes for some of the system PMU drivers. Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-07-26drivers/perf: arm-ccn: Use devm_ioremap_resource() to map memorySudeep Holla
Instead of checking the return value of platform_get_resource(), we can use devm_ioremap_resource() which has the NULL pointer check and the memory region requesting. devm_ioremap_resource is designed to replace calls to devm_request_mem_region followed by devm_ioremap, so let's use the same. Cc: Will Deacon <will.deacon@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-07-24drivers/perf: hisi: update the sccl_id/ccl_id when MT is supportedShaokun Zhang
MT bit in MPIDR_EL1 is now supported in certain HiSilicon platforms, so the mapping between sccl_id/ccl_id and affinity level needs to be updated from the generic encoding we originally used. Cc: John Garry <john.garry@huawei.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com> [will: fixed comment] Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-07-16Merge 4.18-rc5 into char-misc-nextGreg Kroah-Hartman
We want the char-misc fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-10arm64: perf: Add support for chaining event countersSuzuki K Poulose
Add support for 64bit event by using chained event counters and 64bit cycle counters. PMUv3 allows chaining a pair of adjacent 32-bit counters, effectively forming a 64-bit counter. The low/even counter is programmed to count the event of interest, and the high/odd counter is programmed to count the CHAIN event, taken when the low/even counter overflows. For CPU cycles, when 64bit mode is requested, the cycle counter is used in 64bit mode. If the cycle counter is not available, falls back to chaining. Cc: Will Deacon <will.deacon@arm.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-07-10arm_pmu: Tidy up clear_event_idx call backsSuzuki K Poulose
The armpmu uses get_event_idx callback to allocate an event counter for a given event, which marks the selected counter as "used". Now, when we delete the counter, the arm_pmu goes ahead and clears the "used" bit and then invokes the "clear_event_idx" call back, which kind of splits the job between the core code and the backend. To keep things tidy, mandate the implementation of clear_event_idx() and add it for exisiting backends. This will be useful for adding the chained event support, where we leave the event idx maintenance to the backend. Also, when an event is removed from the PMU, reset the hw.idx to indicate that a counter is not allocated for this event, to help the backends do better checks. This will be also used for the chain counter support. Cc: Will Deacon <will.deacon@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-07-10arm_pmu: Add support for 64bit event countersSuzuki K Poulose
Each PMU has a set of 32bit event counters. But in some special cases, the events could be counted using counters which are effectively 64bit wide. e.g, Arm V8 PMUv3 has a 64 bit cycle counter which can count only the CPU cycles. Also, the PMU can chain the event counters to effectively count as a 64bit counter. Add support for tracking the events that uses 64bit counters. This only affects the periods set for each counter in the core driver. Cc: Will Deacon <will.deacon@arm.com> Reviewed-by: Julien Thierry <julien.thierry@arm.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-07-10arm_pmu: Clean up maximum period handlingSuzuki K Poulose
Each PMU defines their max_period of the counter as the maximum value that can be counted. Since all the PMU backends support 32bit counters by default, let us remove the redundant field. No functional changes. Cc: Will Deacon <will.deacon@arm.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-07-07headers: separate linux/mod_devicetable.h from linux/platform_device.hRandy Dunlap
At over 4000 #includes, <linux/platform_device.h> is the 9th most #included header file in the Linux kernel. It does not need <linux/mod_devicetable.h>, so drop that header and explicitly add <linux/mod_devicetable.h> to source files that need it. 4146 #include <linux/platform_device.h> After this patch, there are 225 files that use <linux/mod_devicetable.h>, for a reduction of around 3900 times that <linux/mod_devicetable.h> does not have to be read & parsed. 225 #include <linux/mod_devicetable.h> This patch was build-tested on 20 different arch-es. It also makes these drivers SubmitChecklist#1 compliant. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kbuild test robot <lkp@intel.com> # drivers/media/platform/vimc/ Reported-by: kbuild test robot <lkp@intel.com> # drivers/pinctrl/pinctrl-u300.c Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-04drivers/perf: Initialise return value in armpmu_request_irqs()Will Deacon
If a PMU doesn't have any IRQs, we should return 0 from armpmu_request_irqs(), rather than uninitialised stack. Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-07-02perf/arm-cci: Remove VLA usageKees Cook
In the quest to remove all stack VLA usage from the kernel[1], this removes the VLA in favor of a maximum size and adds a sanity check at registration time. The sizes are all explicitly enumerated already, so this just collects them into macros. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-06-18drivers/perf: xgene_pmu: Fix IOB SLOW PMU parser errorHoan Tran
This patch fixes the below parser error of the IOB SLOW PMU. # perf stat -a -e iob-slow0/cycle-count/ sleep 1 evenf syntax error: 'iob-slow0/cycle-count/' \___ parser error It replaces the "-" character by "_" character inside the PMU name. Signed-off-by: Hoan Tran <hoan.tran@amperecomputing.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-05-29drivers/bus: arm-cci: fix build warningsArnd Bergmann
When the arm-cci driver is enabled, but both CONFIG_ARM_CCI5xx_PMU and CONFIG_ARM_CCI400_PMU are not, we get a warning about how parts of the driver are never used: drivers/perf/arm-cci.c:1454:29: error: 'cci_pmu_models' defined but not used [-Werror=unused-variable] drivers/perf/arm-cci.c:693:16: error: 'cci_pmu_event_show' defined but not used [-Werror=unused-function] drivers/perf/arm-cci.c:685:16: error: 'cci_pmu_format_show' defined but not used [-Werror=unused-function] Marking all three functions as __maybe_unused avoids the warnings in randconfig builds. I'm doing this lacking any ideas for a better fix. Fixes: 3de6be7a3dd8 ("drivers/bus: Split Arm CCI driver") Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-05-22drivers/perf: Remove ARM_SPE_PMU explicit PERF_EVENTS dependencyJohn Garry
Since commit bddb9b68d3fb ("drivers/perf: commonise PERF_EVENTS dependency"), all perf drivers depend on PERF_EVENTS config under a common menu. Config ARM_SPE_PMU still declares explicitly a dependency on PERF_EVENTS, which is unneeded, so remove it. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-05-21drivers/perf: arm-ccn: don't log to dmesg in event_initMark Rutland
The ARM CCN PMU driver uses dev_warn() to complain about parameters in the user-provided perf_event_attr. This means that under normal operation (e.g. a single invocation of the perf tool), a number of messages warnings may be logged to dmesg. Tools may issue multiple syscalls to probe for feature support, and multiple applications (from multiple users) can attempt to open events simultaneously, so this is not very helpful, even if a user happens to have access to dmesg. Worse, this can push important information out of the dmesg ring buffer, and can significantly slow down syscall fuzzers, vastly increasing the time it takes to find critical bugs. Demote the dev_warn() instances to dev_dbg(), as is the case for all other PMU drivers under drivers/perf/. Users who wish to debug PMU event initialisation can enable dynamic debug to receive these messages. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-05-21perf/arm-cci: Allow building as a moduleRobin Murphy
Fill in the few extra bits and annotations needed to make the driver work properly as a module, and jiggle the Kconfig to expose the driver-level ARM_CCI_PMU option. Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-05-21perf/arm-cci: Remove pointless PMU disablingRobin Murphy
The CCI PMU driver bears some legacy remnants of the arm_pmu framework from when it was split in c6f85cb4305b ("bus: cci: move away from arm_pmu framework"). In particular this perf_pmu_{dis,en}able() dance around pmu->add which was fixed for arm_pmu in a9e469d1c89b ("drivers/perf: arm_pmu: remove pointless PMU disabling"). For the exact same reasons (i.e. perf core already does this around the call anyway), give cci_pmu_add() the exact same change, which also prevents having to export those core functions to build it as a module. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-05-21perf/arm-cc*: Fix MODULE_LICENSE() tagsRobin Murphy
The CCI/CCN drivers are licensed under GPLv2, but the MODULE_LICENSE() tags are using the bare "GPL" string implying GPLv2 or later. Fix them to match their actual file license. Acked-by: Pawel Moll <pawel.moll@arm.com> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-05-21arm_pmu: simplify arm_pmu::handle_irqMark Rutland
The arm_pmu::handle_irq() callback has the same prototype as a generic IRQ handler, taking the IRQ number and a void pointer argument which it must convert to an arm_pmu pointer. This means that all arm_pmu::handle_irq() take an IRQ number they never use, and all must explicitly cast the void pointer to an arm_pmu pointer. Instead, let's change arm_pmu::handle_irq to take an arm_pmu pointer, allowing these casts to be removed. The redundant IRQ number parameter is also removed. Suggested-by: Hoeun Ryu <hoeun.ryu@lge.com> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-05-21perf/arm-cci: Remove unnecessary period adjustmentRobin Murphy
Since sampling events are rejected up-front by cci_pmu_event_init(), it doesn't make much sense to go fiddling with the sampling period later. This would seem to be just another leftover artefact of the arm_pmu framwork, and as such can go. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-05-21perf: simplify getting .drvdataWolfram Sang
We should get drvdata from struct device directly. Going via platform_device is an unneeded step back and forth. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-04-05Merge tag 'armsoc-drivers' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC driver updates from Arnd Bergmann: "The main addition this time around is the new ARM "SCMI" framework, which is the latest in a series of standards coming from ARM to do power management in a platform independent way. This has been through many review cycles, and it relies on a rather interesting way of using the mailbox subsystem, but in the end I agreed that Sudeep's version was the best we could do after all. Other changes include: - the ARM CCN driver is moved out of drivers/bus into drivers/perf, which makes more sense. Similarly, the performance monitoring portion of the CCI driver are moved the same way and cleaned up a little more. - a series of updates to the SCPI framework - support for the Mediatek mt7623a SoC in drivers/soc - support for additional NVIDIA Tegra hardware in drivers/soc - a new reset driver for Socionext Uniphier - lesser bug fixes in drivers/soc, drivers/tee, drivers/memory, and drivers/firmware and drivers/reset across platforms" * tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (87 commits) reset: uniphier: add ethernet reset control support for PXs3 reset: stm32mp1: Enable stm32mp1 reset driver dt-bindings: reset: add STM32MP1 resets reset: uniphier: add Pro4/Pro5/PXs2 audio systems reset control reset: imx7: add 'depends on HAS_IOMEM' to fix unmet dependency reset: modify the way reset lookup works for board files reset: add support for non-DT systems clk: scmi: use devm_of_clk_add_hw_provider() API and drop scmi_clocks_remove firmware: arm_scmi: prevent accessing rate_discrete uninitialized hwmon: (scmi) return -EINVAL when sensor information is unavailable amlogic: meson-gx-socinfo: Update soc ids soc/tegra: pmc: Use the new reset APIs to manage reset controllers soc: mediatek: update power domain data of MT2712 dt-bindings: soc: update MT2712 power dt-bindings cpufreq: scmi: add thermal dependency soc: mediatek: fix the mistaken pointer accessed when subdomains are added soc: mediatek: add SCPSYS power domain driver for MediaTek MT7623A SoC soc: mediatek: avoid hardcoded value with bus_prot_mask dt-bindings: soc: add header files required for MT7623A SCPSYS dt-binding dt-bindings: soc: add SCPSYS binding for MT7623 and MT7623A SoC ...
2018-04-04Merge tag 'arm64-upstream' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Will Deacon: "Nothing particularly stands out here, probably because people were tied up with spectre/meltdown stuff last time around. Still, the main pieces are: - Rework of our CPU features framework so that we can whitelist CPUs that don't require kpti even in a heterogeneous system - Support for the IDC/DIC architecture extensions, which allow us to elide instruction and data cache maintenance when writing out instructions - Removal of the large memory model which resulted in suboptimal codegen by the compiler and increased the use of literal pools, which could potentially be used as ROP gadgets since they are mapped as executable - Rework of forced signal delivery so that the siginfo_t is well-formed and handling of show_unhandled_signals is consolidated and made consistent between different fault types - More siginfo cleanup based on the initial patches from Eric Biederman - Workaround for Cortex-A55 erratum #1024718 - Some small ACPI IORT updates and cleanups from Lorenzo Pieralisi - Misc cleanups and non-critical fixes" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (70 commits) arm64: uaccess: Fix omissions from usercopy whitelist arm64: fpsimd: Split cpu field out from struct fpsimd_state arm64: tlbflush: avoid writing RES0 bits arm64: cmpxchg: Include linux/compiler.h in asm/cmpxchg.h arm64: move percpu cmpxchg implementation from cmpxchg.h to percpu.h arm64: cmpxchg: Include build_bug.h instead of bug.h for BUILD_BUG arm64: lse: Include compiler_types.h and export.h for out-of-line LL/SC arm64: fpsimd: include <linux/init.h> in fpsimd.h drivers/perf: arm_pmu_platform: do not warn about affinity on uniprocessor perf: arm_spe: include linux/vmalloc.h for vmap() Revert "arm64: Revert L1_CACHE_SHIFT back to 6 (64-byte cache line size)" arm64: cpufeature: Avoid warnings due to unused symbols arm64: Add work around for Arm Cortex-A55 Erratum 1024718 arm64: Delay enabling hardware DBM feature arm64: Add MIDR encoding for Arm Cortex-A55 and Cortex-A35 arm64: capabilities: Handle shared entries arm64: capabilities: Add support for checks based on a list of MIDRs arm64: Add helpers for checking CPU MIDR against a range arm64: capabilities: Clean up midr range helpers arm64: capabilities: Change scope of VHE to Boot CPU feature ...
2018-03-27drivers/perf: arm_pmu_platform: do not warn about affinity on uniprocessorAlexander Monakov
If there is exactly one CPU present, there is no ambiguity: do not warn that PMU setup would need to guess IRQ affinity. Cc: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Alexander Monakov <amonakov@ispras.ru> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-03-27perf: arm_spe: include linux/vmalloc.h for vmap()Arnd Bergmann
On linux-next, I get a build failure in some configurations: drivers/perf/arm_spe_pmu.c: In function 'arm_spe_pmu_setup_aux': drivers/perf/arm_spe_pmu.c:857:14: error: implicit declaration of function 'vmap'; did you mean 'swap'? [-Werror=implicit-function-declaration] buf->base = vmap(pglist, nr_pages, VM_MAP, PAGE_KERNEL); ^~~~ swap drivers/perf/arm_spe_pmu.c:857:37: error: 'VM_MAP' undeclared (first use in this function); did you mean 'VM_MPX'? buf->base = vmap(pglist, nr_pages, VM_MAP, PAGE_KERNEL); ^~~~~~ VM_MPX drivers/perf/arm_spe_pmu.c:857:37: note: each undeclared identifier is reported only once for each function it appears in drivers/perf/arm_spe_pmu.c: In function 'arm_spe_pmu_free_aux': drivers/perf/arm_spe_pmu.c:878:2: error: implicit declaration of function 'vunmap'; did you mean 'iounmap'? [-Werror=implicit-function-declaration] vmap() is declared in linux/vmalloc.h, so we should include that header file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> [will: add additional missing #includes reported by Mark] Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-03-19Merge tag 'v4.16-rc6' into perf/core, to pick up fixesIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-16perf: Fix sibling iterationPeter Zijlstra
Mark noticed that the change to sibling_list changed some iteration semantics; because previously we used group_list as list entry, sibling events would always have an empty sibling_list. But because we now use sibling_list for both list head and list entry, siblings will report as having siblings. Fix this with a custom for_each_sibling_event() iterator. Fixes: 8343aae66167 ("perf/core: Remove perf_event::group_entry") Reported-by: Mark Rutland <mark.rutland@arm.com> Suggested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: vincent.weaver@maine.edu Cc: alexander.shishkin@linux.intel.com Cc: torvalds@linux-foundation.org Cc: alexey.budankov@linux.intel.com Cc: valery.cherepennikov@intel.com Cc: eranian@google.com Cc: acme@redhat.com Cc: linux-tip-commits@vger.kernel.org Cc: davidcc@google.com Cc: kan.liang@intel.com Cc: Dmitry.Prohorov@intel.com Cc: jolsa@redhat.com Link: https://lkml.kernel.org/r/20180315170129.GX4043@hirez.programming.kicks-ass.net
2018-03-12perf/core: Remove perf_event::group_entryPeter Zijlstra
Now that all the grouping is done with RB trees, we no longer need group_entry and can replace the whole thing with sibling_list. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Carrillo-Cisneros <davidcc@google.com> Cc: Dmitri Prokhorov <Dmitry.Prohorov@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Valery Cherepennikov <valery.cherepennikov@intel.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-06perf/arm-cci: Untangle global cci_ctrl_baseRobin Murphy
Depending directly on the bus driver's global cci_ctrl_base variable is a little unpleasant, and exporting it to allow the PMU driver to be modular would be even more so. Let's make things a little better abstracted by adding the control register block to the cci_pmu instance data alongside the PMU register block, and communicating the mapped address from the bus driver via platform data. It's not practical to try the same thing for the bus driver itself, given that the globals are entangled with the hairy assembly code for port control, so we leave them be there. It would however be prudent to move them to the __ro_after_init section in passing, since the addresses really should never be changing once set. Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-03-06perf/arm-cci: Clean up model discoveryRobin Murphy
Since I am the self-appointed of_device_get_match_data() police, it's only right that I should clean up this driver while I'm otherwise touching it. This also reveals that we're passing around a struct platform_device in places where we only ever care about its regular device, so straighten that out in the process. Acked-by: Punit Agrawal <punit.agrawal@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-03-06perf/arm-cci: Simplify CPU hotplugRobin Murphy
Realistically, systems with multiple CCIs are unlikely to ever exist, and since the driver only actually supports a single instance anyway there's really no need to do the multi-instance hotplug state dance. Take the opportunity to simplify the hotplug-related code all over, addressing the context-migration TODO in the process for good measure. Acked-by: Punit Agrawal <punit.agrawal@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-03-06drivers/bus: Split Arm CCI driverRobin Murphy
The arm-cci driver is really two entirely separate drivers; one for MCPM port control and the other for the performance monitors. Since they are already relatively self-contained, let's take the plunge and move the PMU parts out to drivers/perf where they belong these days. For non-MCPM systems this leaves a small dependency on the remaining "bus" stub for initial probing and discovery, but we end up with something that still fits the general pattern of its fellow system PMU drivers to ease future maintenance. Moving code to a new file also offers a perfect excuse to modernise the license/copyright headers and clean up some funky linewraps on the way. Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Suzuki Poulose <suzuki.poulose@arm.com> Acked-by: Punit Agrawal <punit.agrawal@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-03-06drivers/bus: Move Arm CCN PMU driverRobin Murphy
The arm-ccn driver is purely a perf driver for the CCN PMU, not a bus driver in the sense of the other residents of drivers/bus/, so let's move it to the appropriate place for SoC PMU drivers. Not to mention moving the documentation accordingly as well. Acked-by: Pawel Moll <pawel.moll@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-02-28arm_pmu: Use disable_irq_nosync when disabling SPI in CPU teardown hookWill Deacon
Commit 6de3f79112cc ("arm_pmu: explicitly enable/disable SPIs at hotplug") moved all of the arm_pmu IRQ enable/disable calls to the CPU hotplug hooks, regardless of whether they are implemented as PPIs or SPIs. This can lead to us sleeping from atomic context due to disable_irq blocking: | BUG: sleeping function called from invalid context at kernel/irq/manage.c:112 | in_atomic(): 1, irqs_disabled(): 128, pid: 15, name: migration/1 | no locks held by migration/1/15. | irq event stamp: 192 | hardirqs last enabled at (191): [<00000000803c2507>] | _raw_spin_unlock_irq+0x2c/0x4c | hardirqs last disabled at (192): [<000000007f57ad28>] multi_cpu_stop+0x9c/0x140 | softirqs last enabled at (0): [<0000000004ee1b58>] | copy_process.isra.77.part.78+0x43c/0x1504 | softirqs last disabled at (0): [< (null)>] (null) | CPU: 1 PID: 15 Comm: migration/1 Not tainted 4.16.0-rc3-salvator-x #1651 | Hardware name: Renesas Salvator-X board based on r8a7796 (DT) | Call trace: | dump_backtrace+0x0/0x140 | show_stack+0x14/0x1c | dump_stack+0xb4/0xf0 | ___might_sleep+0x1fc/0x218 | __might_sleep+0x70/0x80 | synchronize_irq+0x40/0xa8 | disable_irq+0x20/0x2c | arm_perf_teardown_cpu+0x80/0xac Since the interrupt is always CPU-affine and this code is running with interrupts disabled, we can just use disable_irq_nosync as we know there isn't a concurrent invocation of the handler to worry about. Fixes: 6de3f79112cc ("arm_pmu: explicitly enable/disable SPIs at hotplug") Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2018-02-20arm_pmu: acpi: request IRQs up-frontMark Rutland
We can't request IRQs in atomic context, so for ACPI systems we'll have to request them up-front, and later associate them with CPUs. This patch reorganises the arm_pmu code to do so. As we no longer have the arm_pmu structure at probe time, a number of prototypes need to be adjusted, requiring changes to the common arm_pmu code and arm_pmu platform code. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-02-20arm_pmu: note IRQs and PMUs per-cpuMark Rutland
To support ACPI systems, we need to request IRQs before we know the associated PMU, and thus we need some percpu variable that the IRQ handler can find the PMU from. As we're going to request IRQs without the PMU, we can't rely on the arm_pmu::active_irqs mask, and similarly need to track requested IRQs with a percpu variable. Signed-off-by: Mark Rutland <mark.rutland@arm.com> [will: made armpmu_count_irq_users static] Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-02-20arm_pmu: explicitly enable/disable SPIs at hotplugMark Rutland
To support ACPI systems, we need to request IRQs before CPUs are hotplugged, and thus we need to request IRQs before we know their associated PMU. This is problematic if a PMU IRQ is pending out of reset, as it may be taken before we know the PMU, and thus the IRQ handler won't be able to handle it, leaving it screaming. To avoid such problems, lets request all IRQs in a disabled state, and explicitly enable/disable them at hotplug time, when we're sure the PMU has been probed. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-02-20arm_pmu: acpi: check for mismatched PPIsMark Rutland
The arm_pmu platform code explicitly checks for mismatched PPIs at probe time, while the ACPI code leaves this to the core code. Future refactoring will make this difficult for the core code to check, so let's have the ACPI code check this explicitly. As before, upon a failure we'll continue on without an interrupt. Ho hum. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-02-20arm_pmu: add armpmu_alloc_atomic()Mark Rutland
In ACPI systems, we don't know the makeup of CPUs until we hotplug them on, and thus have to allocate the PMU datastructures at hotplug time. Thus, we must use GFP_ATOMIC allocations. Let's add an armpmu_alloc_atomic() that we can use in this case. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-02-20arm_pmu: fold platform helpers into platform codeMark Rutland
The armpmu_{request,free}_irqs() helpers are only used by arm_pmu_platform.c, so let's fold them in and make them static. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-02-20arm_pmu: kill arm_pmu_platdataMark Rutland
Now that we have no platforms passing platform data to the arm_pmu code, we can get rid of the platdata and associated hooks, paving the way for rework of our IRQ handling. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>