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  • x86-vdso-2020-06-01

    cd2f45b7 · x86/vdso/Makefile: Add vobjs32 · 
    Clean up various aspects of the vDSO code, no change in
functionality intended.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • x86_cache_updates_for_5.8

    0c4d5ba1 · x86/resctrl: Support wider MBM counters · 
    Add support for wider Memory Bandwidth Monitoring counters by querying
their width from CPUID. As a prerequsite, streamline and unify the CPUID
detection of the respective resource control attributes. By Reinette
Chatre.

  • x86-platform-2020-06-01

    33649bf4 · x86/apic/uv: Remove code for unused distributed GRU mode · 
    This tree cleans up various aspects of the UV platform support code,
it removes unnecessary functions and cleans up the rest.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • x86-mm-2020-06-01

    0fcfdf55 · Documentation: Add L1D flushing Documentation · 
    Misc changes:

 - Unexport various PAT primitives

 - Unexport per-CPU tlbstate

 - Provide an opt-in (prctl driven) mechanism to flush the L1D cache on context switch.
   The goal is to allow tasks that are paranoid due to the recent snoop assisted data
   sampling vulnerabilites, to flush their L1D on being switched out.
   This protects their data from being snooped or leaked via side channels
   after the task has context switched out.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • x86-fpu-2020-06-01

    55e00fb6 · x86/fpu/xstate: Restore supervisor states for signal return · 
    Most of the changes here related to 'XSAVES supervisor state' support,
which is a feature that allows kernel-only data to be automatically
saved/restored by the FPU context switching code.

CPU features that can be supported this way are Intel PT, 'PASID' and
CET features.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • sched-core-2020-06-01

    1f8db415 · sched/headers: Split out open-coded prototypes into kernel/sched/smp.h · 
    Misc updates:

 -

  • x86-cpu-2020-06-01

    3d81b3d1 · x86/cpu: Use RDRAND and RDSEED mnemonics in archrandom.h · 
    Misc updates:

 - Extend the x86 family/model macros with a steppings dimension,
   because x86 life isn't complex enough and Intel uses steppings to
   differentiate between different CPUs. :-/

 - Convert the TSC deadline timer quirks to the steppings macros.

 - Clean up asm mnemonics.

 - Fix the handling of an AMD erratum, or in other words, fix a kernel erratum.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • x86-cleanups-2020-06-01

    2ca41f55 · x86/spinlock: Remove obsolete ticket spinlock macros and types · 
    Misc cleanups, with an emphasis on removing obsolete/dead code.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • x86-build-2020-06-01

    38f3e775 · x86/Kconfig: Update config and kernel doc for MPK feature on AMD · 
    Misc dependency fixes, plus a documentation update about memory protection keys support.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • x86-boot-2020-06-01

    5214028d · x86/boot: Correct relocation destination on old linkers · 
    Misc updates:

 - Add the initrdmem= boot option to specify an initrd embedded in RAM (flash most likely)
 - Sanitize the CS value earlier during boot, which also fixes SEV-ES.
 - Various fixes and smaller cleanups.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • smp-core-2020-06-01

    fb7fb84a · cpu/hotplug: Remove __freeze_secondary_cpus() · 
    Misc cleanups in the SMP hotplug and cross-call code.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • perf-core-2020-06-01

    5cde2653 · perf/x86/rapl: Add AMD Fam17h RAPL support · 
    Kernel side changes:

  - Add AMD Fam17h RAPL support
  - Introduce CAP_PERFMON to kernel and user space
  - Add Zhaoxin CPU support
  - Misc fixes and cleanups

Tooling changes:

  perf record:

    - Introduce --switch-output-event to use arbitrary events to be setup
      and read from a side band thread and, when they take place a signal
      be sent to the main 'perf record' thread, reusing the --switch-output
      code to take perf.data snapshots from the --overwrite ring buffer, e.g.:

	# perf record --overwrite -e sched:* \
		      --switch-output-event syscalls:*connect* \
		      workload

      will take perf.data.YYYYMMDDHHMMSS snapshots up to around the
      connect syscalls.

    - Add --num-synthesize-threads option to control degree of parallelism of the
      synthesize_mmap() code which is scanning /proc/PID/task/PID/maps and can be
      time consuming. This mimics pre-existing behaviour in 'perf top'.

  perf bench:

    - Add a multi-threaded synthesize benchmark.
    - Add kallsyms parsing benchmark.

  Intel PT support:

    - Stitch LBR records from multiple samples to get deeper backtraces,
      there are caveats, see the csets for details.
    - Allow using Intel PT to synthesize callchains for regular events.
    - Add support for synthesizing branch stacks for regular events (cycles,
      instructions, etc) from Intel PT data.

  Misc changes:

    - Updated perf vendor events for power9 and Coresight.
    - Add flamegraph.py script via 'perf flamegraph'
    - Misc other changes, fixes and cleanups - see the Git log for details.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • acpi-5.8-rc1

    48ccdedd · Merge branches 'acpi-apei', 'acpi-pmic', 'acpi-video' and 'acpi-dptf' · 
    ACPI updates for 5.8-rc1

 - Update the ACPICA code in the kernel to upstream revision
   20200430:

   * Move acpi_gbl_next_cmd_num definition (Erik Kaneda).

   * Ignore AE_ALREADY_EXISTS status in the disassembler when parsing
     create operators (Erik Kaneda).

   * Add status checks to the dispatcher (Erik Kaneda).

   * Fix required parameters for _NIG and _NIH (Erik Kaneda).

   * Make acpi_protocol_lengths static (Yue Haibing).

 - Fix ACPI table reference counting errors in several places, mostly
   in error code paths (Hanjun Guo).

 - Extend the Generic Event Device (GED) driver to support _Exx and
   _Lxx handler methods (Ard Biesheuvel).

 - Add new acpi_evaluate_reg() helper and modify the ACPI PCI hotplug
   code to use it (Hans de Goede).

 - Add new DPTF battery participant driver and make the DPFT power
   participant driver create more sysfs device attributes (Srinivas
   Pandruvada).

 - Improve the handling of memory failures in APEI (James Morse).

 - Add new blacklist entry for Acer TravelMate 5735Z to the backlight
   driver (Paul Menzel).

 - Add i2c address for thermal control to the PMIC driver (Mauro
   Carvalho Chehab).

 - Allow the ACPI processor idle driver to work on platforms with
   only one ACPI C-state present (Zhang Rui).

 - Fix kobject reference count leaks in error code paths in two
   places (Qiushi Wu).

 - Delete unused proc filename macros and make some symbols static
   (Pascal Terjan, Zheng Zengkai, Zou Wei).

  • pnp-5.8-rc1

    9361797c · PNPBIOS: Replace zero-length array with flexible-array · 
    PNP update for 5.8-rc1

Replace a zero-length array with a flexible-array (Gustavo A. R. Silva).

  • objtool-core-2020-06-01

    0decf1f8 · objtool: Enable compilation of objtool for all architectures · 
    There are a lot of objtool changes in this cycle, all across the map:

 - Speed up objtool significantly, especially when there are large number of sections
 - Improve objtool's understanding of special instructions such as IRET,
   to reduce the number of annotations required
 - Implement 'noinstr' validation
 - Do baby steps for non-x86 objtool use
 - Simplify/fix retpoline decoding
 - Add vmlinux validation
 - Improve documentation
 - Fix various bugs and apply smaller cleanups

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • pm-5.8-rc1

    a34024d9 · Merge branches 'pm-devfreq', 'powercap', 'pm-docs' and 'pm-tools' · 
    Power management updates for 5.8-rc1

 - Rework the system-wide PM driver flags to make them easier to
   understand and use and update their documentation (Rafael Wysocki,
   Alan Stern).

 - Allow cpuidle governors to be switched at run time regardless of
   the kernel configuration and update the related documentation
   accordingly (Hanjun Guo).

 - Improve the resume device handling in the user space hibernarion
   interface code (Domenico Andreoli).

 - Document the intel-speed-select sysfs interface (Srinivas
   Pandruvada).

 - Make the ACPI code handing suspend to idle print more debug
   messages to help diagnose issues with it (Rafael Wysocki).

 - Fix a helper routine in the cpufreq core and correct a typo in
   the struct cpufreq_driver kerneldoc comment (Rafael Wysocki, Wang
   Wenhu).

 - Update cpufreq drivers:

   * Make the intel_pstate driver start in the passive mode by
     default on systems without HWP (Rafael Wysocki).

   * Add i.MX7ULP support to the imx-cpufreq-dt driver and add
     i.MX7ULP to the cpufreq-dt-platdev blacklist (Peng Fan).

   * Convert the qoriq cpufreq driver to a platform one, make the
     platform code create a suitable device object for it and add
     platform dependencies to it (Mian Yousaf Kaukab, Geert
     Uytterhoeven).

   * Fix wrong compatible binding in the qcom driver (Ansuel Smith).

   * Build the omap driver by default for ARCH_OMAP2PLUS (Anders
     Roxell).

   * Add r8a7742 SoC support to the dt cpufreq driver (Lad Prabhakar).

 - Update cpuidle core and drivers:

   * Fix three reference count leaks in error code paths in the
     cpuidle core (Qiushi Wu).

   * Convert Qualcomm SPM to a generic cpuidle driver (Stephan
     Gerhold).

   * Fix up the execution order when entering a domain idle state in
     the PSCI driver (Ulf Hansson).

 - Fix a reference counting issue related to clock management and
   clean up two oddities in the PM-runtime framework (Rafael Wysocki,
   Andy Shevchenko).

 - Add ElkhartLake support to the Intel RAPL power capping driver
   and remove an unused local MSR definition from it (Jacob Pan,
   Sumeet Pawnikar).

 - Update devfreq core and drivers:

   * Replace strncpy() with strscpy() in the devfreq core and use
     lockdep asserts instead of manual checks for a locked mutex in
     it (Dmitry Osipenko, Krzysztof Kozlowski).

   * Add a generic imx bus scaling driver and make it register an
     interconnect device (Leonard Crestez, Gustavo A. R. Silva).

   * Make the cpufreq notifier in the tegra30 driver take boosting
     into account and delete an unuseful error message from that
     driver (Dmitry Osipenko, Markus Elfring).

 - Remove unneeded semicolon from the cpupower code (Zou Wei).

  • locking-core-2020-06-01

    19f545b6 · zram: Use local lock to protect per-CPU data · 
    The biggest change to core locking facilities in this cycle is the introduction
of local_lock_t - this primitive comes from the -rt project and identifies
CPU-local locking dependencies normally handled opaquely beind preempt_disable()
or local_irq_save/disable() critical sections.

The generated code on mainline kernels doesn't change as a result, but still there
are benefits: improved debugging and better documentation of data structure
accesses.

The new local_lock_t primitives are introduced and then utilized in a couple of
kernel subsystems. No change in functionality is intended.

There's also other smaller changes and cleanups.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • efi-core-2020-06-01

    e9524fb9 · efi/x86: Don't blow away existing initrd · 
    The EFI changes for this cycle are:

 - preliminary changes for RISC-V
 - Add support for setting the resolution on the EFI framebuffer
 - Simplify kernel image loading for arm64
 - Move .bss into .data via the linker script instead of relying on symbol
   annotations.
 - Get rid of __pure getters to access global variables
 - Clean up the config table matching arrays
 - Rename pr_efi/pr_efi_err to efi_info/efi_err, and use them consistently
 - Simplify and unify initrd loading
 - Parse the builtin command line on x86 (if provided)
 - Implement printk() support, including support for wide character strings
 - Simplify GDT handling in early mixed mode thunking code
 - Some other minor fixes and cleanups

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • core-rcu-2020-06-01

    cb3cb673 · Merge branch 'WIP.core/rcu' into core/rcu, to pick up two x86/entry dependencies · 
    The RCU updates for this cycle were:

 - RCU-tasks update, including addition of RCU Tasks Trace for
   BPF use and TASKS_RUDE_RCU
 - kfree_rcu() updates.
 - Remove scheduler locking restriction
 - RCU CPU stall warning updates.
 - Torture-test updates.
 - Miscellaneous fixes and other updates.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

  • core-kprobes-2020-06-01

    66e9b071 · kprobes: Prevent probes in .noinstr.text section · 
    Various kprobes updates, mostly centered around cleaning up the no-instrumentation
logic, instead of the current per debug facility blacklist, use the more generic
.noinstr.text approach, combined with a 'noinstr' marker for functions.

Also add instrumentation_begin()/end() to better manage the exact place in entry
code where instrumentation may be used.

Also add a kprobes blacklist for modules.

Signed-off-by: Ingo Molnar <mingo@kernel.org>