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7027 commits

Author SHA1 Message Date
Linus Torvalds c958423470 Tracing updates for 5.12
- Update to the way irqs and preemption is tracked via the trace event PC field
 
  - Fix handling of unregistering event failing due to allocate memory.
    This is only triggered by failure injection, as it is pretty much guaranteed
    to have less than a page allocation succeed.
 
  - Do not show the useless "filter" or "enable" files for the "ftrace" trace
    system, as they have no effect on doing anything.
 
  - Add a warning if kprobes are registered more than once.
 
  - Synthetic events now have their fields parsed by semicolons.
    Old formats without semicolons will still work, but new features will
    require them.
 
  - New option to allow trace events to show %p without hashing in trace file.
    The trace file can only be read by root, and reading the raw event buffer
    did not have any pointers hashed, so this does not expose anything new.
 
  - New directory in tools called tools/tracing, where a new tool that reads
    sequential latency reports from the ftrace latency tracers.
 
  - Other minor fixes and cleanups.
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Merge tag 'trace-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:

 - Update to the way irqs and preemption is tracked via the trace event
   PC field

 - Fix handling of unregistering event failing due to allocate memory.
   This is only triggered by failure injection, as it is pretty much
   guaranteed to have less than a page allocation succeed.

 - Do not show the useless "filter" or "enable" files for the "ftrace"
   trace system, as they have no effect on doing anything.

 - Add a warning if kprobes are registered more than once.

 - Synthetic events now have their fields parsed by semicolons. Old
   formats without semicolons will still work, but new features will
   require them.

 - New option to allow trace events to show %p without hashing in trace
   file. The trace file can only be read by root, and reading the raw
   event buffer did not have any pointers hashed, so this does not
   expose anything new.

 - New directory in tools called tools/tracing, where a new tool that
   reads sequential latency reports from the ftrace latency tracers.

 - Other minor fixes and cleanups.

* tag 'trace-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (33 commits)
  kprobes: Fix to delay the kprobes jump optimization
  tracing/tools: Add the latency-collector to tools directory
  tracing: Make hash-ptr option default
  tracing: Add ptr-hash option to show the hashed pointer value
  tracing: Update the stage 3 of trace event macro comment
  tracing: Show real address for trace event arguments
  selftests/ftrace: Add '!event' synthetic event syntax check
  selftests/ftrace: Update synthetic event syntax errors
  tracing: Add a backward-compatibility check for synthetic event creation
  tracing: Update synth command errors
  tracing: Rework synthetic event command parsing
  tracing/dynevent: Delegate parsing to create function
  kprobes: Warn if the kprobe is reregistered
  ftrace: Remove unused ftrace_force_update()
  tracepoints: Code clean up
  tracepoints: Do not punish non static call users
  tracepoints: Remove unnecessary "data_args" macro parameter
  tracing: Do not create "enable" or "filter" files for ftrace event subsystem
  kernel: trace: preemptirq_delay_test: add cpu affinity
  tracepoint: Do not fail unregistering a probe due to memory failure
  ...
2021-02-22 14:07:15 -08:00
Linus Torvalds b2bec7d8a4 printk changes for 5.12
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Merge tag 'printk-for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

Pull printk updates from Petr Mladek:

 - New "no_hash_pointers" kernel parameter causes that %p shows raw
   pointer values instead of hashed ones. It is intended only for
   debugging purposes. Misuse is prevented by a fat warning message that
   is inspired by trace_printk().

 - Prevent a possible deadlock when flushing printk_safe buffers during
   panic().

 - Fix performance regression caused by the lockless printk ringbuffer.
   It was visible with huge log buffer and long messages.

 - Documentation fix-up.

* tag 'printk-for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
  lib/vsprintf: no_hash_pointers prints all addresses as unhashed
  kselftest: add support for skipped tests
  lib: use KSTM_MODULE_GLOBALS macro in kselftest drivers
  printk: avoid prb_first_valid_seq() where possible
  printk: fix deadlock when kernel panic
  printk: rectify kernel-doc for prb_rec_init_wr()
2021-02-22 11:04:36 -08:00
Linus Torvalds 783955f03d linux-kselftest-kunit-5.12-rc1
This KUnit update for Linux 5.12-rc1 consists of consists of:
 
 -- support for filtering test suites using glob from Daniel Latypov.
 
    "kunit_filter.glob" command line option is passed to the UML
    kernel, which currently only supports filtering by suite name.
    This support allows running different subsets of tests, e.g.
 
    $ ./tools/testing/kunit/kunit.py build
    $ ./tools/testing/kunit/kunit.py exec 'list*'
    $ ./tools/testing/kunit/kunit.py exec 'kunit*'
 
 -- several fixes and cleanups also from Daniel Latypov.
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Merge tag 'linux-kselftest-kunit-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull KUnit updates from Shuah Khan

 - support for filtering test suites using glob from Daniel Latypov.

     "kunit_filter.glob" command line option is passed to the UML
     kernel, which currently only supports filtering by suite name.
     This support allows running different subsets of tests, e.g.

      $ ./tools/testing/kunit/kunit.py build
      $ ./tools/testing/kunit/kunit.py exec 'list*'
      $ ./tools/testing/kunit/kunit.py exec 'kunit*'

 - several fixes and cleanups also from Daniel Latypov.

* tag 'linux-kselftest-kunit-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  kunit: tool: fix unintentional statefulness in run_kernel()
  kunit: tool: add support for filtering suites by glob
  kunit: add kunit.filter_glob cmdline option to filter suites
  kunit: don't show `1 == 1` in failed assertion messages
  kunit: make kunit_tool accept optional path to .kunitconfig fragment
  Documentation: kunit: add tips.rst for small examples
  KUnit: Docs: make start.rst example Kconfig follow style.rst
  kunit: tool: simplify kconfig is_subset_of() logic
  minor: kunit: tool: fix unit test so it can run from non-root dir
  kunit: tool: use `with open()` in unit test
  kunit: tool: stop using bare asserts in unit test
  kunit: tool: fix unit test cleanup handling
2021-02-22 11:03:00 -08:00
Linus Torvalds 80215095ce linux-kselftest-next-5.12-rc1
This Kselftest update for Linux 5.12-rc1 consists of:
 
 - dmabuf-heaps test fixes and cleanups from John Stultz.
 - seccomp test fix to accept any valid fd in user_notification_addfd.
 - Minor fixes to breakpoints and vDSO tests.
 - Minor code cleanups to ipc and x86 tests.
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Merge tag 'linux-kselftest-next-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull Kselftest updates from Shuah Khan:

 - dmabuf-heaps test fixes and cleanups from John Stultz

 - seccomp test fix to accept any valid fd in user_notification_addfd

 - Minor fixes to breakpoints and vDSO tests

 - Minor code cleanups to ipc and x86 tests

* tag 'linux-kselftest-next-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/seccomp: Accept any valid fd in user_notification_addfd
  selftests/timens: add futex binary to .gitignore
  selftests: breakpoints: Use correct error messages in breakpoint_test_arm64.c
  selftests/vDSO: fix ABI selftest on riscv
  selftests/x86/ldt_gdt: remove unneeded semicolon
  selftests/ipc: remove unneeded semicolon
  kselftests: dmabuf-heaps: Add extra checking that allocated buffers are zeroed
  kselftests: dmabuf-heaps: Cleanup test output
  kselftests: dmabuf-heaps: Softly fail if don't find a vgem device
  kselftests: dmabuf-heaps: Add clearer checks on DMABUF_BEGIN/END_SYNC
  kselftests: dmabuf-heaps: Fix Makefile's inclusion of the kernel's usr/include dir
2021-02-22 11:01:53 -08:00
Linus Torvalds 0e63a5c6ba It has been a relatively quiet cycle in docsland.
- As promised, the minimum Sphinx version to build the docs is now 1.7,
    and we have dropped support for Python 2 entirely.  That allowed the
    removal of a bunch of compatibility code.
 
  - A set of treewide warning fixups from Mauro that I applied after it
    became clear nobody else was going to deal with them.
 
  - The automarkup mechanism can now create cross-references from relative
    paths to RST files.
 
  - More translations, typo fixes, and warning fixes.
 
 No conflicts with any other tree as far as I know.
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Merge tag 'docs-5.12' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "It has been a relatively quiet cycle in docsland.

   - As promised, the minimum Sphinx version to build the docs is now
     1.7, and we have dropped support for Python 2 entirely. That
     allowed the removal of a bunch of compatibility code.

   - A set of treewide warning fixups from Mauro that I applied after it
     became clear nobody else was going to deal with them.

   - The automarkup mechanism can now create cross-references from
     relative paths to RST files.

   - More translations, typo fixes, and warning fixes"

* tag 'docs-5.12' of git://git.lwn.net/linux: (75 commits)
  docs: kernel-hacking: be more civil
  docs: Remove the Microsoft rhetoric
  Documentation/admin-guide: kernel-parameters: Update nohlt section
  doc/admin-guide: fix spelling mistake: "perfomance" -> "performance"
  docs: Document cross-referencing using relative path
  docs: Enable usage of relative paths to docs on automarkup
  docs: thermal: fix spelling mistakes
  Documentation: admin-guide: Update kvm/xen config option
  docs: Make syscalls' helpers naming consistent
  coding-style.rst: Avoid comma statements
  Documentation: /proc/loadavg: add 3 more field descriptions
  Documentation/submitting-patches: Add blurb about backtraces in commit messages
  Docs: drop Python 2 support
  Move our minimum Sphinx version to 1.7
  Documentation: input: define ABS_PRESSURE/ABS_MT_PRESSURE resolution as grams
  scripts/kernel-doc: add internal hyperlink to DOC: sections
  Update Documentation/admin-guide/sysctl/fs.rst
  docs: Update DTB format references
  docs: zh_CN: add iio index.rst translation
  docs/zh_CN: add iio ep93xx_adc.rst translation
  ...
2021-02-22 10:57:46 -08:00
Linus Torvalds 3672ac8ac0 RDMA 5.12 merge window pull request
- Driver updates and bug fixes: siw, hns, bnxt_re, mlx5, efa
 
 - Significant rework in rxe to get it ready to have XRC support added
 
 - Several rts bug fixes
 
 - Big series to get to 'make W=1' cleanness, primarily updating kdocs
 
 - Support for creating a RDMA MR from a DMABUF fd to allow PCI peer to
   peer transfers to GPU VRAM
 
 - Device disassociation now works properly with umad
 
 - Work to support more than 255 ports on a RDMA device
 
 - Further support for the new HNS HIP09 hardware
 
 - Coding style cleanups: comma to semicolon, unneded semicolon/blank
   lines, remove 'h' printk format, don't check for NULL before kfree,
   use true/false for bool.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma updates from Jason Gunthorpe:
 "This is quite a small cycle, if not for Lee's 70 patches cleaning the
  kdocs it would be well below typical for patch count.

  Most of the interesting work here was in the HNS and rxe drivers which
  got fairly major internal changes.

  Summary:

   - Driver updates and bug fixes: siw, hns, bnxt_re, mlx5, efa

   - Significant rework in rxe to get it ready to have XRC support added

   - Several rts bug fixes

   - Big series to get to 'make W=1' cleanness, primarily updating kdocs

   - Support for creating a RDMA MR from a DMABUF fd to allow PCI peer
     to peer transfers to GPU VRAM

   - Device disassociation now works properly with umad

   - Work to support more than 255 ports on a RDMA device

   - Further support for the new HNS HIP09 hardware

   - Coding style cleanups: comma to semicolon, unneded semicolon/blank
     lines, remove 'h' printk format, don't check for NULL before kfree,
     use true/false for bool"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (205 commits)
  RDMA/rtrs-srv: Do not pass a valid pointer to PTR_ERR()
  RDMA/srp: Fix support for unpopulated and unbalanced NUMA nodes
  RDMA/mlx5: Fail QP creation if the device can not support the CQE TS
  RDMA/mlx5: Allow CQ creation without attached EQs
  RDMA/rtrs-srv-sysfs: fix missing put_device
  RDMA/rtrs-srv: fix memory leak by missing kobject free
  RDMA/rtrs: Only allow addition of path to an already established session
  RDMA/rtrs-srv: Fix stack-out-of-bounds
  RDMA/rxe: Remove unused pkt->offset
  RDMA/ucma: Fix use-after-free bug in ucma_create_uevent
  RDMA/core: Fix kernel doc warnings for ib_port_immutable_read()
  RDMA/qedr: Use true and false for bool variable
  RDMA/hns: Adjust definition of FRMR fields
  RDMA/hns: Refactor process of posting CMDQ
  RDMA/hns: Adjust fields and variables about CMDQ tail/head
  RDMA/hns: Remove redundant operations on CMDQ
  RDMA/hns: Fixes missing error code of CMDQ
  RDMA/hns: Remove unused member and variable of CMDQ
  RDMA/ipoib: Remove racy Subnet Manager sendonly join checks
  RDMA/mlx5: Support 400Gbps IB rate in mlx5 driver
  ...
2021-02-22 10:27:48 -08:00
Linus Torvalds 882d6edfc4 gpio updates for v5.12
- new driver for the Toshiba Visconti platform
 - rework of interrupt handling in gpio-tegra
 - updates for GPIO selftests: we're now using the character device to perform
   the subsystem checks
 - support for a new rcar variant + some code refactoring
 - refactoring of gpio-ep93xx
 - SPDX License identifier has been updated in the uapi header so that userspace
   programs bundling it can become fully REUSE-compliant
 - improvements to pwm handling in gpio-mvebu
 - support for interrupt handling and power management for gpio-xilinx as well
   as some code refactoring
 - support for a new chip variant in gpio-pca953x
 - removal of drivers: zte xs & intel-mid and removal of leftovers from
   intel-msic
 - impovements to intel drivers pulled from Andy Shevchenko
 - improvements to the gpio-aggregator virtual GPIO driver
 - and several minor tweaks and fixes to code and documentation all over the
   place
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Merge tag 'gpio-updates-for-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski:
 "It's been a relatively calm release cycle and we're actually removing
  more code than we're adding.

  Summary:

   - new driver for the Toshiba Visconti platform

   - rework of interrupt handling in gpio-tegra

   - updates for GPIO selftests: we're now using the character device to
     perform the subsystem checks

   - support for a new rcar variant + some code refactoring

   - refactoring of gpio-ep93xx

   - SPDX License identifier has been updated in the uapi header so that
     userspace programs bundling it can become fully REUSE-compliant

   - improvements to pwm handling in gpio-mvebu

   - support for interrupt handling and power management for gpio-xilinx
     as well as some code refactoring

   - support for a new chip variant in gpio-pca953x

   - removal of drivers: zte xs & intel-mid and removal of leftovers
     from intel-msic

   - impovements to intel drivers pulled from Andy Shevchenko

   - improvements to the gpio-aggregator virtual GPIO driver

   - and several minor tweaks and fixes to code and documentation all
     over the place"

* tag 'gpio-updates-for-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (71 commits)
  gpio: pcf857x: Fix missing first interrupt
  gpio: ep93xx: refactor base IRQ number
  gpio: ep93xx: refactor ep93xx_gpio_add_bank
  gpio: ep93xx: Fix typo s/hierarchial/hierarchical
  gpio: ep93xx: drop to_irq binding
  gpio: ep93xx: Fix wrong irq numbers in port F
  gpio: uapi: use the preferred SPDX license identifier
  gpio: gpio-xilinx: Add check if width exceeds 32
  gpio: gpio-xilinx: Add support for suspend and resume
  gpio: gpio-xilinx: Add interrupt support
  gpio: gpio-xilinx: Reduce spinlock array to array
  gpio: gpio-xilinx: Simplify with dev_err_probe()
  gpio: msic: Drop driver from Makefile
  gpio: wcove: Split out to_ireg() helper and deduplicate the code
  gpio: wcove: Switch to use regmap_set_bits(), regmap_clear_bits()
  gpio: wcove: Get rid of error prone casting in IRQ handler
  gpio: intel-mid: Remove driver for deprecated platform
  gpio: msic: Remove driver for deprecated platform
  gpio: aggregator: Remove trailing comma in terminator entries
  gpio: aggregator: Use compound literal from the header
  ...
2021-02-22 10:00:46 -08:00
Linus Torvalds 3e10585335 x86:
- Support for userspace to emulate Xen hypercalls
 - Raise the maximum number of user memslots
 - Scalability improvements for the new MMU.  Instead of the complex
   "fast page fault" logic that is used in mmu.c, tdp_mmu.c uses an
   rwlock so that page faults are concurrent, but the code that can run
   against page faults is limited.  Right now only page faults take the
   lock for reading; in the future this will be extended to some
   cases of page table destruction.  I hope to switch the default MMU
   around 5.12-rc3 (some testing was delayed due to Chinese New Year).
 - Cleanups for MAXPHYADDR checks
 - Use static calls for vendor-specific callbacks
 - On AMD, use VMLOAD/VMSAVE to save and restore host state
 - Stop using deprecated jump label APIs
 - Workaround for AMD erratum that made nested virtualization unreliable
 - Support for LBR emulation in the guest
 - Support for communicating bus lock vmexits to userspace
 - Add support for SEV attestation command
 - Miscellaneous cleanups
 
 PPC:
 - Support for second data watchpoint on POWER10
 - Remove some complex workarounds for buggy early versions of POWER9
 - Guest entry/exit fixes
 
 ARM64
 - Make the nVHE EL2 object relocatable
 - Cleanups for concurrent translation faults hitting the same page
 - Support for the standard TRNG hypervisor call
 - A bunch of small PMU/Debug fixes
 - Simplification of the early init hypercall handling
 
 Non-KVM changes (with acks):
 - Detection of contended rwlocks (implemented only for qrwlocks,
   because KVM only needs it for x86)
 - Allow __DISABLE_EXPORTS from assembly code
 - Provide a saner follow_pfn replacements for modules
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Paolo Bonzini:
 "x86:

   - Support for userspace to emulate Xen hypercalls

   - Raise the maximum number of user memslots

   - Scalability improvements for the new MMU.

     Instead of the complex "fast page fault" logic that is used in
     mmu.c, tdp_mmu.c uses an rwlock so that page faults are concurrent,
     but the code that can run against page faults is limited. Right now
     only page faults take the lock for reading; in the future this will
     be extended to some cases of page table destruction. I hope to
     switch the default MMU around 5.12-rc3 (some testing was delayed
     due to Chinese New Year).

   - Cleanups for MAXPHYADDR checks

   - Use static calls for vendor-specific callbacks

   - On AMD, use VMLOAD/VMSAVE to save and restore host state

   - Stop using deprecated jump label APIs

   - Workaround for AMD erratum that made nested virtualization
     unreliable

   - Support for LBR emulation in the guest

   - Support for communicating bus lock vmexits to userspace

   - Add support for SEV attestation command

   - Miscellaneous cleanups

  PPC:

   - Support for second data watchpoint on POWER10

   - Remove some complex workarounds for buggy early versions of POWER9

   - Guest entry/exit fixes

  ARM64:

   - Make the nVHE EL2 object relocatable

   - Cleanups for concurrent translation faults hitting the same page

   - Support for the standard TRNG hypervisor call

   - A bunch of small PMU/Debug fixes

   - Simplification of the early init hypercall handling

  Non-KVM changes (with acks):

   - Detection of contended rwlocks (implemented only for qrwlocks,
     because KVM only needs it for x86)

   - Allow __DISABLE_EXPORTS from assembly code

   - Provide a saner follow_pfn replacements for modules"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (192 commits)
  KVM: x86/xen: Explicitly pad struct compat_vcpu_info to 64 bytes
  KVM: selftests: Don't bother mapping GVA for Xen shinfo test
  KVM: selftests: Fix hex vs. decimal snafu in Xen test
  KVM: selftests: Fix size of memslots created by Xen tests
  KVM: selftests: Ignore recently added Xen tests' build output
  KVM: selftests: Add missing header file needed by xAPIC IPI tests
  KVM: selftests: Add operand to vmsave/vmload/vmrun in svm.c
  KVM: SVM: Make symbol 'svm_gp_erratum_intercept' static
  locking/arch: Move qrwlock.h include after qspinlock.h
  KVM: PPC: Book3S HV: Fix host radix SLB optimisation with hash guests
  KVM: PPC: Book3S HV: Ensure radix guest has no SLB entries
  KVM: PPC: Don't always report hash MMU capability for P9 < DD2.2
  KVM: PPC: Book3S HV: Save and restore FSCR in the P9 path
  KVM: PPC: remove unneeded semicolon
  KVM: PPC: Book3S HV: Use POWER9 SLBIA IH=6 variant to clear SLB
  KVM: PPC: Book3S HV: No need to clear radix host SLB before loading HPT guest
  KVM: PPC: Book3S HV: Fix radix guest SLB side channel
  KVM: PPC: Book3S HV: Remove support for running HPT guest on RPT host without mixed mode support
  KVM: PPC: Book3S HV: Introduce new capability for 2nd DAWR
  KVM: PPC: Book3S HV: Add infrastructure to support 2nd DAWR
  ...
2021-02-21 13:31:43 -08:00
Linus Torvalds 99ca0edb41 arm64 updates for 5.12
- vDSO build improvements including support for building with BSD.
 
  - Cleanup to the AMU support code and initialisation rework to support
    cpufreq drivers built as modules.
 
  - Removal of synthetic frame record from exception stack when entering
    the kernel from EL0.
 
  - Add support for the TRNG firmware call introduced by Arm spec
    DEN0098.
 
  - Cleanup and refactoring across the board.
 
  - Avoid calling arch_get_random_seed_long() from
    add_interrupt_randomness()
 
  - Perf and PMU updates including support for Cortex-A78 and the v8.3
    SPE extensions.
 
  - Significant steps along the road to leaving the MMU enabled during
    kexec relocation.
 
  - Faultaround changes to initialise prefaulted PTEs as 'old' when
    hardware access-flag updates are supported, which drastically
    improves vmscan performance.
 
  - CPU errata updates for Cortex-A76 (#1463225) and Cortex-A55
    (#1024718)
 
  - Preparatory work for yielding the vector unit at a finer granularity
    in the crypto code, which in turn will one day allow us to defer
    softirq processing when it is in use.
 
  - Support for overriding CPU ID register fields on the command-line.
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Will Deacon:

 - vDSO build improvements including support for building with BSD.

 - Cleanup to the AMU support code and initialisation rework to support
   cpufreq drivers built as modules.

 - Removal of synthetic frame record from exception stack when entering
   the kernel from EL0.

 - Add support for the TRNG firmware call introduced by Arm spec
   DEN0098.

 - Cleanup and refactoring across the board.

 - Avoid calling arch_get_random_seed_long() from
   add_interrupt_randomness()

 - Perf and PMU updates including support for Cortex-A78 and the v8.3
   SPE extensions.

 - Significant steps along the road to leaving the MMU enabled during
   kexec relocation.

 - Faultaround changes to initialise prefaulted PTEs as 'old' when
   hardware access-flag updates are supported, which drastically
   improves vmscan performance.

 - CPU errata updates for Cortex-A76 (#1463225) and Cortex-A55
   (#1024718)

 - Preparatory work for yielding the vector unit at a finer granularity
   in the crypto code, which in turn will one day allow us to defer
   softirq processing when it is in use.

 - Support for overriding CPU ID register fields on the command-line.

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (85 commits)
  drivers/perf: Replace spin_lock_irqsave to spin_lock
  mm: filemap: Fix microblaze build failure with 'mmu_defconfig'
  arm64: Make CPU_BIG_ENDIAN depend on ld.bfd or ld.lld 13.0.0+
  arm64: cpufeatures: Allow disabling of Pointer Auth from the command-line
  arm64: Defer enabling pointer authentication on boot core
  arm64: cpufeatures: Allow disabling of BTI from the command-line
  arm64: Move "nokaslr" over to the early cpufeature infrastructure
  KVM: arm64: Document HVC_VHE_RESTART stub hypercall
  arm64: Make kvm-arm.mode={nvhe, protected} an alias of id_aa64mmfr1.vh=0
  arm64: Add an aliasing facility for the idreg override
  arm64: Honor VHE being disabled from the command-line
  arm64: Allow ID_AA64MMFR1_EL1.VH to be overridden from the command line
  arm64: cpufeature: Add an early command-line cpufeature override facility
  arm64: Extract early FDT mapping from kaslr_early_init()
  arm64: cpufeature: Use IDreg override in __read_sysreg_by_encoding()
  arm64: cpufeature: Add global feature override facility
  arm64: Move SCTLR_EL1 initialisation to EL-agnostic code
  arm64: Simplify init_el2_state to be non-VHE only
  arm64: Move VHE-specific SPE setup to mutate_to_vhe()
  arm64: Drop early setting of MDSCR_EL2.TPMS
  ...
2021-02-21 13:08:42 -08:00
Linus Torvalds d089f48fba These are the latest RCU updates for v5.12:
- Documentation updates.
 
  - Miscellaneous fixes.
 
  - kfree_rcu() updates: Addition of mem_dump_obj() to provide allocator return
    addresses to more easily locate bugs.  This has a couple of RCU-related commits,
    but is mostly MM.  Was pulled in with akpm's agreement.
 
  - Per-callback-batch tracking of numbers of callbacks,
    which enables better debugging information and smarter
    reactions to large numbers of callbacks.
 
  - The first round of changes to allow CPUs to be runtime switched from and to
    callback-offloaded state.
 
  - CONFIG_PREEMPT_RT-related changes.
 
  - RCU CPU stall warning updates.
 
  - Addition of polling grace-period APIs for SRCU.
 
  - Torture-test and torture-test scripting updates, including a "torture everything"
    script that runs rcutorture, locktorture, scftorture, rcuscale, and refscale.
    Plus does an allmodconfig build.
 
  - nolibc fixes for the torture tests
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'core-rcu-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull RCU updates from Ingo Molnar:
 "These are the latest RCU updates for v5.12:

   - Documentation updates.

   - Miscellaneous fixes.

   - kfree_rcu() updates: Addition of mem_dump_obj() to provide
     allocator return addresses to more easily locate bugs. This has a
     couple of RCU-related commits, but is mostly MM. Was pulled in with
     akpm's agreement.

   - Per-callback-batch tracking of numbers of callbacks, which enables
     better debugging information and smarter reactions to large numbers
     of callbacks.

   - The first round of changes to allow CPUs to be runtime switched
     from and to callback-offloaded state.

   - CONFIG_PREEMPT_RT-related changes.

   - RCU CPU stall warning updates.

   - Addition of polling grace-period APIs for SRCU.

   - Torture-test and torture-test scripting updates, including a
     "torture everything" script that runs rcutorture, locktorture,
     scftorture, rcuscale, and refscale. Plus does an allmodconfig
     build.

   - nolibc fixes for the torture tests"

* tag 'core-rcu-2021-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (130 commits)
  percpu_ref: Dump mem_dump_obj() info upon reference-count underflow
  rcu: Make call_rcu() print mem_dump_obj() info for double-freed callback
  mm: Make mem_obj_dump() vmalloc() dumps include start and length
  mm: Make mem_dump_obj() handle vmalloc() memory
  mm: Make mem_dump_obj() handle NULL and zero-sized pointers
  mm: Add mem_dump_obj() to print source of memory block
  tools/rcutorture: Fix position of -lgcc in mkinitrd.sh
  tools/nolibc: Fix position of -lgcc in the documented example
  tools/nolibc: Emit detailed error for missing alternate syscall number definitions
  tools/nolibc: Remove incorrect definitions of __ARCH_WANT_*
  tools/nolibc: Get timeval, timespec and timezone from linux/time.h
  tools/nolibc: Implement poll() based on ppoll()
  tools/nolibc: Implement fork() based on clone()
  tools/nolibc: Make getpgrp() fall back to getpgid(0)
  tools/nolibc: Make dup2() rely on dup3() when available
  tools/nolibc: Add the definition for dup()
  rcutorture: Add rcutree.use_softirq=0 to RUDE01 and TASKS01
  torture: Maintain torture-specific set of CPUs-online books
  torture: Clean up after torture-test CPU hotplugging
  rcutorture: Make object_debug also double call_rcu() heap object
  ...
2021-02-21 12:04:41 -08:00
Linus Torvalds 317d4f4593 - Complete the MSR write filtering by applying it to the MSR ioctl
interface too.
 
 - Other misc small fixups.
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Merge tag 'x86_misc_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 misc updates from Borislav Petkov:

 - Complete the MSR write filtering by applying it to the MSR ioctl
   interface too.

 - Other misc small fixups.

* tag 'x86_misc_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/MSR: Filter MSR writes through X86_IOC_WRMSR_REGS ioctl too
  selftests/fpu: Fix debugfs_simple_attr.cocci warning
  selftests/x86: Use __builtin_ia32_read/writeeflags
  x86/reboot: Add Zotac ZBOX CI327 nano PCI reboot quirk
2021-02-20 19:44:19 -08:00
Jason Gunthorpe 7289e26f39 Linux 5.11
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Merge tag 'v5.11' into rdma.git for-next

Linux 5.11

Merged to resolve conflicts with RDMA rc commits

- drivers/infiniband/sw/rxe/rxe_net.c
  The final logic is to call rxe_get_dev_from_net() again with the master
  netdev if the packet was rx'd on a vlan. To keep the elimination of the
  local variables requires a trivial edit to the code in -rc

Link: https://lore.kernel.org/r/20210210131542.215ea67c@canb.auug.org.au
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-02-18 11:19:29 -04:00
Jakub Kicinski b646acd5eb net: re-solve some conflicts after net -> net-next merge
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-02-16 23:12:23 -08:00
David S. Miller d489ded1a3 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-02-16 17:51:13 -08:00
David S. Miller b8af417e4d Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Daniel Borkmann says:

====================
pull-request: bpf-next 2021-02-16

The following pull-request contains BPF updates for your *net-next* tree.

There's a small merge conflict between 7eeba1706e ("tcp: Add receive timestamp
support for receive zerocopy.") from net-next tree and 9cacf81f81 ("bpf: Remove
extra lock_sock for TCP_ZEROCOPY_RECEIVE") from bpf-next tree. Resolve as follows:

  [...]
                lock_sock(sk);
                err = tcp_zerocopy_receive(sk, &zc, &tss);
                err = BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN(sk, level, optname,
                                                          &zc, &len, err);
                release_sock(sk);
  [...]

We've added 116 non-merge commits during the last 27 day(s) which contain
a total of 156 files changed, 5662 insertions(+), 1489 deletions(-).

The main changes are:

1) Adds support of pointers to types with known size among global function
   args to overcome the limit on max # of allowed args, from Dmitrii Banshchikov.

2) Add bpf_iter for task_vma which can be used to generate information similar
   to /proc/pid/maps, from Song Liu.

3) Enable bpf_{g,s}etsockopt() from all sock_addr related program hooks. Allow
   rewriting bind user ports from BPF side below the ip_unprivileged_port_start
   range, both from Stanislav Fomichev.

4) Prevent recursion on fentry/fexit & sleepable programs and allow map-in-map
   as well as per-cpu maps for the latter, from Alexei Starovoitov.

5) Add selftest script to run BPF CI locally. Also enable BPF ringbuffer
   for sleepable programs, both from KP Singh.

6) Extend verifier to enable variable offset read/write access to the BPF
   program stack, from Andrei Matei.

7) Improve tc & XDP MTU handling and add a new bpf_check_mtu() helper to
   query device MTU from programs, from Jesper Dangaard Brouer.

8) Allow bpf_get_socket_cookie() helper also be called from [sleepable] BPF
   tracing programs, from Florent Revest.

9) Extend x86 JIT to pad JMPs with NOPs for helping image to converge when
   otherwise too many passes are required, from Gary Lin.

10) Verifier fixes on atomics with BPF_FETCH as well as function-by-function
    verification both related to zero-extension handling, from Ilya Leoshkevich.

11) Better kernel build integration of resolve_btfids tool, from Jiri Olsa.

12) Batch of AF_XDP selftest cleanups and small performance improvement
    for libbpf's xsk map redirect for newer kernels, from Björn Töpel.

13) Follow-up BPF doc and verifier improvements around atomics with
    BPF_FETCH, from Brendan Jackman.

14) Permit zero-sized data sections e.g. if ELF .rodata section contains
    read-only data from local variables, from Yonghong Song.

15) veth driver skb bulk-allocation for ndo_xdp_xmit, from Lorenzo Bianconi.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-16 13:14:06 -08:00
Kent Gibson 94329e158e selftests: gpio: add CONFIG_GPIO_CDEV to config
GPIO CDEV is now optional and required for the selftests so add it to
the config.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-02-15 11:43:29 +01:00
Kent Gibson 10f33652c0 selftests: gpio: port to GPIO uAPI v2
Add a port to the GPIO uAPI v2 interface and make it the default.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-02-15 11:43:28 +01:00
Kent Gibson 999e71c351 selftests: remove obsolete gpio references from kselftest_deps.sh
GPIO Makefile has been greatly simplified so remove references to lines
which no longer exist.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-02-15 11:43:28 +01:00
Kent Gibson 01e1250f13 selftests: remove obsolete build restriction for gpio
Build restrictions related to the gpio-mockup-chardev helper are
no longer relevant so remove them.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-02-15 11:43:28 +01:00
Kent Gibson e029759861 selftests: gpio: remove obsolete gpio-mockup-chardev.c
GPIO selftests have changed to new gpio-mockup-cdev helper, so remove
old gpio-mockup-chardev helper.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-02-15 11:43:28 +01:00
Kent Gibson 8bc395a6a2 selftests: gpio: rework and simplify test implementation
The GPIO mockup selftests are overly complicated with separate
implementations of the tests for sysfs and cdev uAPI, and with the cdev
implementation being dependent on tools/gpio and libmount.

Rework the test implementation to provide a common test suite with a
simplified pluggable uAPI interface.  The cdev implementation utilises
the GPIO uAPI directly to remove the dependence on tools/gpio.
The simplified uAPI interface removes the need for any file system mount
checks in C, and so removes the dependence on libmount.

The rework also fixes the sysfs test implementation which has been broken
since the device created in the multiple gpiochip case was split into
separate devices.

Fixes: 8a39f597bc ("gpio: mockup: rework device probing")
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-02-15 11:43:28 +01:00
Timur Tabi d9d4de2309 kselftest: add support for skipped tests
Update the kselftest framework to allow client drivers to
specify that some tests were skipped.

Signed-off-by: Timur Tabi <timur@kernel.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Tested-by: Petr Mladek <pmladek@suse.com>
Acked-by: Marco Elver <elver@google.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20210214161348.369023-3-timur@kernel.org
2021-02-15 11:07:42 +01:00
Dmitrii Banshchikov 8b08807d03 selftests/bpf: Add unit tests for pointers in global functions
test_global_func9  - check valid pointer's scenarios
test_global_func10 - check that a smaller type cannot be passed as a
                     larger one
test_global_func11 - check that CTX pointer cannot be passed
test_global_func12 - check access to a null pointer
test_global_func13 - check access to an arbitrary pointer value
test_global_func14 - check that an opaque pointer cannot be passed
test_global_func15 - check that a variable has an unknown value after
		     it was passed to a global function by pointer
test_global_func16 - check access to uninitialized stack memory

test_global_func_args - check read and write operations through a pointer

Signed-off-by: Dmitrii Banshchikov <me@ubique.spb.ru>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210212205642.620788-5-me@ubique.spb.ru
2021-02-12 17:37:23 -08:00
Guillaume Nault c09bfd9a5d selftests: tc: Add generic mpls matching support for tc-flower
Add tests in tc_flower.sh for generic matching on MPLS Label Stack
Entries. The label, tc, bos and ttl fields are tested for the first
and second labels. For each field, the minimal and maximal values are
tested (the former at depth 1 and the later at depth 2).
There are also tests for matching the presence of a label stack entry
at a given depth.

In order to reduce the amount of code, all "lse" subcommands are tested
in match_mpls_lse_test(). Action "continue" is used, so that test
packets are evaluated by all filters. Then, we can verify if each
filter matched the expected number of packets.

Some versions of tc-flower produced invalid json output when dumping
MPLS filters with depth > 1. Skip the test if tc isn't recent enough.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12 17:13:52 -08:00
Guillaume Nault 203ee5cd72 selftests: tc: Add basic mpls_* matching support for tc-flower
Add tests in tc_flower.sh for mpls_label, mpls_tc, mpls_bos and
mpls_ttl. For each keyword, test the minimal and maximal values.

Selectively skip these new mpls tests for tc versions that don't
support them.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12 17:13:52 -08:00
Davide Caratti d212683805 flow_dissector: fix TTL and TOS dissection on IPv4 fragments
the following command:

 # tc filter add dev $h2 ingress protocol ip pref 1 handle 101 flower \
   $tcflags dst_ip 192.0.2.2 ip_ttl 63 action drop

doesn't drop all IPv4 packets that match the configured TTL / destination
address. In particular, if "fragment offset" or "more fragments" have non
zero value in the IPv4 header, setting of FLOW_DISSECTOR_KEY_IP is simply
ignored. Fix this dissecting IPv4 TTL and TOS before fragment info; while
at it, add a selftest for tc flower's match on 'ip_ttl' that verifies the
correct behavior.

Fixes: 518d8a2e9b ("net/flow_dissector: add support for dissection of misc ip header fields")
Reported-by: Shuang Li <shuali@redhat.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12 17:03:51 -08:00
Matthieu Baerts 5f88117f25 selftests: mptcp: fail if not enough SYN/3rd ACK
If we receive less MPCapable SYN or 3rd ACK than expected, we now mark
the test as failed.

On the other hand, if we receive more, we keep the warning but we add a
hint that it is probably due to retransmissions and that's why we don't
mark the test as failed.

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/148
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12 16:20:34 -08:00
Matthieu Baerts 45759a8715 selftests: mptcp: display warnings on one line
Before we had this in case of SYN retransmissions:

  (...)
  # ns4 MPTCP -> ns2 (10.0.1.2:10034      ) MPTCP	(duration  1201ms) [ OK ]
  # ns4 MPTCP -> ns2 (dead:beef:1::2:10035) MPTCP	(duration  1242ms) [ OK ]
  # ns4 MPTCP -> ns2 (10.0.2.1:10036      ) MPTCP	ns2-60143c00-cDZWo4 SYNRX: MPTCP -> MPTCP: expect 11, got
  # 13
  # (duration  6221ms) [ OK ]
  # ns4 MPTCP -> ns2 (dead:beef:2::1:10037) MPTCP	(duration  1427ms) [ OK ]
  # ns4 MPTCP -> ns3 (10.0.2.2:10038      ) MPTCP	(duration   881ms) [ OK ]
  (...)

Now we have:

  (...)
  # ns4 MPTCP -> ns2 (10.0.1.2:10034      ) MPTCP	(duration  1201ms) [ OK ]
  # ns4 MPTCP -> ns2 (dead:beef:1::2:10035) MPTCP	(duration  1242ms) [ OK ]
  # ns4 MPTCP -> ns2 (10.0.2.1:10036      ) MPTCP	(duration  6221ms) [ OK ] WARN: SYNRX: expect 11, got 13
  # ns4 MPTCP -> ns2 (dead:beef:2::1:10037) MPTCP	(duration  1427ms) [ OK ]
  # ns4 MPTCP -> ns3 (10.0.2.2:10038      ) MPTCP	(duration   881ms) [ OK ]
  (...)

So we put everything on one line, keep the durations and "OK" aligned
and removed duplicated info to short the warning.

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12 16:20:34 -08:00
Matthieu Baerts f384221a38 selftests: mptcp: fix ACKRX debug message
Info from received MPCapable SYN were printed instead of the ones from
received MPCapable 3rd ACK.

Fixes: fed61c4b58 ("selftests: mptcp: make 2nd net namespace use tcp syn cookies unconditionally")
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12 16:20:34 -08:00
Paolo Abeni 767389c8dd selftests: mptcp: dump more info on errors
Even if that may sound completely unlikely, the mptcp implementation
is not perfect, yet.

When the self-tests report an error we usually need more information
of what the scripts currently report. iproute allow provides
some additional goodies since a few releases, let's dump them.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12 16:20:34 -08:00
Jesper Dangaard Brouer b62eba5632 selftests/bpf: Tests using bpf_check_mtu BPF-helper
Adding selftest for BPF-helper bpf_check_mtu(). Making sure
it can be used from both XDP and TC.

V16:
 - Fix 'void' function definition

V11:
 - Addresse nitpicks from Andrii Nakryiko

V10:
 - Remove errno non-zero test in CHECK_ATTR()
 - Addresse comments from Andrii Nakryiko

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/161287791989.790810.13612620012522164562.stgit@firesoul
2021-02-13 01:15:28 +01:00
Jesper Dangaard Brouer 6b8838be7e selftests/bpf: Use bpf_check_mtu in selftest test_cls_redirect
This demonstrate how bpf_check_mtu() helper can easily be used together
with bpf_skb_adjust_room() helper, prior to doing size adjustment, as
delta argument is already setup.

Hint: This specific test can be selected like this:
 ./test_progs -t cls_redirect

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/161287791481.790810.4444271170546646080.stgit@firesoul
2021-02-13 01:15:28 +01:00
Song Liu e8168840e1 selftests/bpf: Add test for bpf_iter_task_vma
The test dumps information similar to /proc/pid/maps. The first line of
the output is compared against the /proc file to make sure they match.

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210212183107.50963-4-songliubraving@fb.com
2021-02-12 12:56:54 -08:00
Martin KaFai Lau a79e88dd2c bpf: selftests: Add non function pointer test to struct_ops
This patch adds a "void *owner" member.  The existing
bpf_tcp_ca test will ensure the bpf_cubic.o and bpf_dctcp.o
can be loaded.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210212021037.267278-1-kafai@fb.com
2021-02-12 11:49:36 -08:00
Paolo Bonzini 8c6e67bec3 KVM/arm64 updates for Linux 5.12
- Make the nVHE EL2 object relocatable, resulting in much more
   maintainable code
 - Handle concurrent translation faults hitting the same page
   in a more elegant way
 - Support for the standard TRNG hypervisor call
 - A bunch of small PMU/Debug fixes
 - Allow the disabling of symbol export from assembly code
 - Simplification of the early init hypercall handling
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Merge tag 'kvmarm-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 updates for Linux 5.12

- Make the nVHE EL2 object relocatable, resulting in much more
  maintainable code
- Handle concurrent translation faults hitting the same page
  in a more elegant way
- Support for the standard TRNG hypervisor call
- A bunch of small PMU/Debug fixes
- Allow the disabling of symbol export from assembly code
- Simplification of the early init hypercall handling
2021-02-12 11:23:44 -05:00
Ingo Molnar 2b392cb11c Merge branch 'for-mingo-nolibc' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull nolibc fixes from Paul E. McKenney.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2021-02-12 12:59:14 +01:00
Ingo Molnar 85e853c5ec Merge branch 'for-mingo-rcu' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU updates from Paul E. McKenney:

- Documentation updates.

- Miscellaneous fixes.

- kfree_rcu() updates: Addition of mem_dump_obj() to provide allocator return
  addresses to more easily locate bugs.  This has a couple of RCU-related commits,
  but is mostly MM.  Was pulled in with akpm's agreement.

- Per-callback-batch tracking of numbers of callbacks,
  which enables better debugging information and smarter
  reactions to large numbers of callbacks.

- The first round of changes to allow CPUs to be runtime switched from and to
  callback-offloaded state.

- CONFIG_PREEMPT_RT-related changes.

- RCU CPU stall warning updates.
- Addition of polling grace-period APIs for SRCU.

- Torture-test and torture-test scripting updates, including a "torture everything"
  script that runs rcutorture, locktorture, scftorture, rcuscale, and refscale.
  Plus does an allmodconfig build.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2021-02-12 12:56:55 +01:00
Florent Revest 6fdd671baa selftests/bpf: Add a selftest for the tracing bpf_get_socket_cookie
This builds up on the existing socket cookie test which checks whether
the bpf_get_socket_cookie helpers provide the same value in
cgroup/connect6 and sockops programs for a socket created by the
userspace part of the test.

Instead of having an update_cookie sockops program tag a socket local
storage with 0xFF, this uses both an update_cookie_sockops program and
an update_cookie_tracing program which succesively tag the socket with
0x0F and then 0xF0.

Signed-off-by: Florent Revest <revest@chromium.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: KP Singh <kpsingh@kernel.org>
Link: https://lore.kernel.org/bpf/20210210111406.785541-5-revest@chromium.org
2021-02-11 17:44:41 -08:00
Florent Revest 6cd4dcc3fb selftests/bpf: Use vmlinux.h in socket_cookie_prog.c
When migrating from the bpf.h's to the vmlinux.h's definition of struct
bps_sock, an interesting LLVM behavior happened. LLVM started producing
two fetches of ctx->sk in the sockops program this means that the
verifier could not keep track of the NULL-check on ctx->sk. Therefore,
we need to extract ctx->sk in a variable before checking and
dereferencing it.

Signed-off-by: Florent Revest <revest@chromium.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: KP Singh <kpsingh@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210210111406.785541-4-revest@chromium.org
2021-02-11 17:44:41 -08:00
Florent Revest 61f8c9c8f3 selftests/bpf: Integrate the socket_cookie test to test_progs
Currently, the selftest for the BPF socket_cookie helpers is built and
run independently from test_progs. It's easy to forget and hard to
maintain.

This patch moves the socket cookies test into prog_tests/ and vastly
simplifies its logic by:
- rewriting the loading code with BPF skeletons
- rewriting the server/client code with network helpers
- rewriting the cgroup code with test__join_cgroup
- rewriting the error handling code with CHECKs

Signed-off-by: Florent Revest <revest@chromium.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: KP Singh <kpsingh@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210210111406.785541-3-revest@chromium.org
2021-02-11 17:44:41 -08:00
Tom Zanussi 7d5367539a selftests/ftrace: Add '!event' synthetic event syntax check
Add a check confirming that '!event' alone will remove a synthetic
event.

Link: https://lkml.kernel.org/r/1dff3f03d18542cece08c10d6323d8a8dba11e42.1612208610.git.zanussi@kernel.org

Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2021-02-11 16:22:32 -05:00
Tom Zanussi b5734e997e selftests/ftrace: Update synthetic event syntax errors
Some of the synthetic event errors and positions have changed in the
code - update those and add several more tests.

Also add a runtime check to ensure that the kernel supports dynamic
strings in synthetic events, which these tests require.

Link: https://lkml.kernel.org/r/51402656433455baead34f068c6e9466b64df9c0.1612208610.git.zanussi@kernel.org

Fixes: 81ff92a93d (selftests/ftrace: Add test case for synthetic event syntax errors)
Reported-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2021-02-11 16:22:20 -05:00
Björn Töpel 732fa32330 selftests/bpf: Convert test_xdp_redirect.sh to bash
The test_xdp_redirect.sh script uses a bash feature, '&>'. On systems,
e.g. Debian, where '/bin/sh' is dash, this will not work as
expected. Use bash in the shebang to get the expected behavior.

Further, using 'set -e' means that the error of a command cannot be
captured without the command being executed with '&&' or '||'. Let us
restructure the ping-commands, and use them as an if-expression, so
that we can capture the return value.

v4: Added missing Fixes:, and removed local variables. (Andrii)
v3: Reintroduced /bin/bash, and kept 'set -e'. (Andrii)
v2: Kept /bin/sh and removed bashisms. (Randy)

Fixes: 996139e801 ("selftests: bpf: add a test for XDP redirect")
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210211082029.1687666-1-bjorn.topel@gmail.com
2021-02-11 16:28:02 +01:00
Alexei Starovoitov 750e5d7649 selftests/bpf: Add a test for map-in-map and per-cpu maps in sleepable progs
Add a basic test for map-in-map and per-cpu maps in sleepable programs.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: KP Singh <kpsingh@kernel.org>
Link: https://lore.kernel.org/bpf/20210210033634.62081-10-alexei.starovoitov@gmail.com
2021-02-11 16:19:28 +01:00
Alexei Starovoitov dcf33b6f4d selftests/bpf: Improve recursion selftest
Since recursion_misses counter is available in bpf_prog_info
improve the selftest to make sure it's counting correctly.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210210033634.62081-8-alexei.starovoitov@gmail.com
2021-02-11 16:19:24 +01:00
Alexei Starovoitov 406c557edc selftest/bpf: Add a recursion test
Add recursive non-sleepable fentry program as a test.
All attach points where sleepable progs can execute are non recursive so far.
The recursion protection mechanism for sleepable cannot be activated yet.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210210033634.62081-6-alexei.starovoitov@gmail.com
2021-02-11 16:19:16 +01:00
Alexei Starovoitov ca06f55b90 bpf: Add per-program recursion prevention mechanism
Since both sleepable and non-sleepable programs execute under migrate_disable
add recursion prevention mechanism to both types of programs when they're
executed via bpf trampoline.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210210033634.62081-5-alexei.starovoitov@gmail.com
2021-02-11 16:19:13 +01:00
Sean Christopherson f1b83973a1 KVM: selftests: Don't bother mapping GVA for Xen shinfo test
Don't bother mapping the Xen shinfo pages into the guest, they don't need
to be accessed using the GVAs and passing a define with "GPA" in the name
to addr_gva2hpa() is confusing.

Cc: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210210182609.435200-5-seanjc@google.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-11 08:02:49 -05:00
Sean Christopherson fc79ef3e7b KVM: selftests: Fix hex vs. decimal snafu in Xen test
The Xen shinfo selftest uses '40' when setting the GPA of the vCPU info
struct, but checks for the result at '0x40'.  Arbitrarily use the hex
version to resolve the bug.

Fixes: 8d4e7e8083 ("KVM: x86: declare Xen HVM shared info capability and add test case")
Cc: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210210182609.435200-4-seanjc@google.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-11 08:02:09 -05:00
Sean Christopherson a685d99208 KVM: selftests: Fix size of memslots created by Xen tests
For better or worse, the memslot APIs take the number of pages, not the
size in bytes.  The Xen tests need 2 pages, not 8192 pages.

Fixes: 8d4e7e8083 ("KVM: x86: declare Xen HVM shared info capability and add test case")
Cc: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210210182609.435200-3-seanjc@google.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-11 08:02:09 -05:00