renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-19 18:53:52 +08:00
Code
882,674 Commits 41 Branches 2 Tags 3.4 GiB
7794b1d418
Commit Graph

19908 Commits

Author SHA1 Message Date
Linus Torvalds
7794b1d418 powerpc updates for 5.5 
Highlights:
 
  - Infrastructure for secure boot on some bare metal Power9 machines. The
    firmware support is still in development, so the code here won't actually
    activate secure boot on any existing systems.
 
  - A change to xmon (our crash handler / pseudo-debugger) to restrict it to
    read-only mode when the kernel is lockdown'ed, otherwise it's trivial to drop
    into xmon and modify kernel data, such as the lockdown state.
 
  - Support for KASLR on 32-bit BookE machines (Freescale / NXP).
 
  - Fixes for our flush_icache_range() and __kernel_sync_dicache() (VDSO) to work
    with memory ranges >4GB.
 
  - Some reworks of the pseries CMM (Cooperative Memory Management) driver to
    make it behave more like other balloon drivers and enable some cleanups of
    generic mm code.
 
  - A series of fixes to our hardware breakpoint support to properly handle
    unaligned watchpoint addresses.
 
 Plus a bunch of other smaller improvements, fixes and cleanups.
 
 Thanks to:
   Alastair D'Silva, Andrew Donnellan, Aneesh Kumar K.V, Anthony Steinhauser,
   Cédric Le Goater, Chris Packham, Chris Smart, Christophe Leroy, Christopher M.
   Riedl, Christoph Hellwig, Claudio Carvalho, Daniel Axtens, David Hildenbrand,
   Deb McLemore, Diana Craciun, Eric Richter, Geert Uytterhoeven, Greg
   Kroah-Hartman, Greg Kurz, Gustavo L. F. Walbon, Hari Bathini, Harish, Jason
   Yan, Krzysztof Kozlowski, Leonardo Bras, Mathieu Malaterre, Mauro S. M.
   Rodrigues, Michal Suchanek, Mimi Zohar, Nathan Chancellor, Nathan Lynch, Nayna
   Jain, Nick Desaulniers, Oliver O'Halloran, Qian Cai, Rasmus Villemoes, Ravi
   Bangoria, Sam Bobroff, Santosh Sivaraj, Scott Wood, Thomas Huth, Tyrel
   Datwyler, Vaibhav Jain, Valentin Longchamp, YueHaibing.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAl3hBycTHG1wZUBlbGxl
 cm1hbi5pZC5hdQAKCRBR6+o8yOGlgApBEACk91MEQDYJ9MF9I6uN+85qb5p4pMsp
 rGzqnpt+XFidbDAc3eP63pYfIDSo3jtkQ2YL7shAnDOTvkO0md+Vqkl9Aq/G6FIf
 lDBlwbgkXMSxS/O2Lpvfn4NZAoK6dKmiV55LSgfliM62X3e2Saeg6TR55wBTgJ6/
 SlYPDwZfcVHOAiFS3UmfB+hkiIZk+AI5Zr5VAZvT2ZmeH36yAWkq4JgJI1uAk6m1
 /7iCnlfUjx/nl/BhnA3kjjmAgGCJ5s/WuVgwFMz47XpMBWGBhLWpMh/NqDTFb8ca
 kpiVQoVPQe2xyO3pL/kOwBy6sii26ftfHDhLKMy1hJdEhVQzS5LerPIMeh1qsU8Q
 hV/Cj+jfsrS/vBDOehj3jwx93t+861PmTOqgLnpYQ6Ltrt+2B/74+fufGMHE1kI3
 Ffo7xvNw4sw6bSziDxDFqUx2P1dFN5D5EJsJsYM98ekkVAAkzNqCDRvfD2QI8Pif
 VXWPYXqtNJTrVPJA0D7Yfo9FDNwhANd0f1zi7r/U5mVXBFUyKOlGqTQSkXgMrVeK
 3I7wHPOVGgdA5UUkfcd3pcuqsY081U9E//o5PUfj8ybO5JCwly8NoatbG+xHmKia
 a72uJT8MjCo9mGCHKDrwi9l/kqms6ZSv8RP+yMhGuB52YoiGc6PpVyab5jXIUd1N
 yTtBlC0YGW1JYw==
 =JHzg
 -----END PGP SIGNATURE-----

Merge tag 'powerpc-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "Highlights:

   - Infrastructure for secure boot on some bare metal Power9 machines.
     The firmware support is still in development, so the code here
     won't actually activate secure boot on any existing systems.

   - A change to xmon (our crash handler / pseudo-debugger) to restrict
     it to read-only mode when the kernel is lockdown'ed, otherwise it's
     trivial to drop into xmon and modify kernel data, such as the
     lockdown state.

   - Support for KASLR on 32-bit BookE machines (Freescale / NXP).

   - Fixes for our flush_icache_range() and __kernel_sync_dicache()
     (VDSO) to work with memory ranges >4GB.

   - Some reworks of the pseries CMM (Cooperative Memory Management)
     driver to make it behave more like other balloon drivers and enable
     some cleanups of generic mm code.

   - A series of fixes to our hardware breakpoint support to properly
     handle unaligned watchpoint addresses.

  Plus a bunch of other smaller improvements, fixes and cleanups.

  Thanks to: Alastair D'Silva, Andrew Donnellan, Aneesh Kumar K.V,
  Anthony Steinhauser, Cédric Le Goater, Chris Packham, Chris Smart,
  Christophe Leroy, Christopher M. Riedl, Christoph Hellwig, Claudio
  Carvalho, Daniel Axtens, David Hildenbrand, Deb McLemore, Diana
  Craciun, Eric Richter, Geert Uytterhoeven, Greg Kroah-Hartman, Greg
  Kurz, Gustavo L. F. Walbon, Hari Bathini, Harish, Jason Yan, Krzysztof
  Kozlowski, Leonardo Bras, Mathieu Malaterre, Mauro S. M. Rodrigues,
  Michal Suchanek, Mimi Zohar, Nathan Chancellor, Nathan Lynch, Nayna
  Jain, Nick Desaulniers, Oliver O'Halloran, Qian Cai, Rasmus Villemoes,
  Ravi Bangoria, Sam Bobroff, Santosh Sivaraj, Scott Wood, Thomas Huth,
  Tyrel Datwyler, Vaibhav Jain, Valentin Longchamp, YueHaibing"

* tag 'powerpc-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (144 commits)
  powerpc/fixmap: fix crash with HIGHMEM
  x86/efi: remove unused variables
  powerpc: Define arch_is_kernel_initmem_freed() for lockdep
  powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp
  powerpc: Avoid clang warnings around setjmp and longjmp
  powerpc: Don't add -mabi= flags when building with Clang
  powerpc: Fix Kconfig indentation
  powerpc/fixmap: don't clear fixmap area in paging_init()
  selftests/powerpc: spectre_v2 test must be built 64-bit
  powerpc/powernv: Disable native PCIe port management
  powerpc/kexec: Move kexec files into a dedicated subdir.
  powerpc/32: Split kexec low level code out of misc_32.S
  powerpc/sysdev: drop simple gpio
  powerpc/83xx: map IMMR with a BAT.
  powerpc/32s: automatically allocate BAT in setbat()
  powerpc/ioremap: warn on early use of ioremap()
  powerpc: Add support for GENERIC_EARLY_IOREMAP
  powerpc/fixmap: Use __fix_to_virt() instead of fix_to_virt()
  powerpc/8xx: use the fixmapped IMMR in cpm_reset()
  powerpc/8xx: add __init to cpm1 init functions
  ...
 2019-11-30 14:35:43 -08:00
Linus Torvalds
95f1fa9e34 New tracing features: 
- PERAMAENT flag to ftrace_ops when attaching a callback to a function
    As /proc/sys/kernel/ftrace_enabled when set to zero will disable all
    attached callbacks in ftrace, this has a detrimental impact on live
    kernel tracing, as it disables all that it patched. If a ftrace_ops
    is registered to ftrace with the PERMANENT flag set, it will prevent
    ftrace_enabled from being disabled, and if ftrace_enabled is already
    disabled, it will prevent a ftrace_ops with PREMANENT flag set from
    being registered.
 
  - New register_ftrace_direct(). As eBPF would like to register its own
    trampolines to be called by the ftrace nop locations directly,
    without going through the ftrace trampoline, this function has been
    added. This allows for eBPF trampolines to live along side of
    ftrace, perf, kprobe and live patching. It also utilizes the ftrace
    enabled_functions file that keeps track of functions that have been
    modified in the kernel, to allow for security auditing.
 
  - Allow for kernel internal use of ftrace instances. Subsystems in
    the kernel can now create and destroy their own tracing instances
    which allows them to have their own tracing buffer, and be able
    to record events without worrying about other users from writing over
    their data.
 
  - New seq_buf_hex_dump() that lets users use the hex_dump() in their
    seq_buf usage.
 
  - Notifications now added to tracing_max_latency to allow user space
    to know when a new max latency is hit by one of the latency tracers.
 
  - Wider spread use of generic compare operations for use of bsearch and
    friends.
 
  - More synthetic event fields may be defined (32 up from 16)
 
  - Use of xarray for architectures with sparse system calls, for the
    system call trace events.
 
 This along with small clean ups and fixes.
 -----BEGIN PGP SIGNATURE-----
 
 iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCXdwv4BQccm9zdGVkdEBn
 b29kbWlzLm9yZwAKCRAp5XQQmuv6qnB5AP91vsdHQjwE1+/UWG/cO+qFtKvn2QJK
 QmBRIJNH/s+1TAD/fAOhgw+ojSK3o/qc+NpvPTEW9AEwcJL1wacJUn+XbQc=
 =ztql
 -----END PGP SIGNATURE-----

Merge tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "New tracing features:

   - New PERMANENT flag to ftrace_ops when attaching a callback to a
     function.

     As /proc/sys/kernel/ftrace_enabled when set to zero will disable
     all attached callbacks in ftrace, this has a detrimental impact on
     live kernel tracing, as it disables all that it patched. If a
     ftrace_ops is registered to ftrace with the PERMANENT flag set, it
     will prevent ftrace_enabled from being disabled, and if
     ftrace_enabled is already disabled, it will prevent a ftrace_ops
     with PREMANENT flag set from being registered.

   - New register_ftrace_direct().

     As eBPF would like to register its own trampolines to be called by
     the ftrace nop locations directly, without going through the ftrace
     trampoline, this function has been added. This allows for eBPF
     trampolines to live along side of ftrace, perf, kprobe and live
     patching. It also utilizes the ftrace enabled_functions file that
     keeps track of functions that have been modified in the kernel, to
     allow for security auditing.

   - Allow for kernel internal use of ftrace instances.

     Subsystems in the kernel can now create and destroy their own
     tracing instances which allows them to have their own tracing
     buffer, and be able to record events without worrying about other
     users from writing over their data.

   - New seq_buf_hex_dump() that lets users use the hex_dump() in their
     seq_buf usage.

   - Notifications now added to tracing_max_latency to allow user space
     to know when a new max latency is hit by one of the latency
     tracers.

   - Wider spread use of generic compare operations for use of bsearch
     and friends.

   - More synthetic event fields may be defined (32 up from 16)

   - Use of xarray for architectures with sparse system calls, for the
     system call trace events.

  This along with small clean ups and fixes"

* tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (51 commits)
  tracing: Enable syscall optimization for MIPS
  tracing: Use xarray for syscall trace events
  tracing: Sample module to demonstrate kernel access to Ftrace instances.
  tracing: Adding new functions for kernel access to Ftrace instances
  tracing: Fix Kconfig indentation
  ring-buffer: Fix typos in function ring_buffer_producer
  ftrace: Use BIT() macro
  ftrace: Return ENOTSUPP when DYNAMIC_FTRACE_WITH_DIRECT_CALLS is not configured
  ftrace: Rename ftrace_graph_stub to ftrace_stub_graph
  ftrace: Add a helper function to modify_ftrace_direct() to allow arch optimization
  ftrace: Add helper find_direct_entry() to consolidate code
  ftrace: Add another check for match in register_ftrace_direct()
  ftrace: Fix accounting bug with direct->count in register_ftrace_direct()
  ftrace/selftests: Fix spelling mistake "wakeing" -> "waking"
  tracing: Increase SYNTH_FIELDS_MAX for synthetic_events
  ftrace/samples: Add a sample module that implements modify_ftrace_direct()
  ftrace: Add modify_ftrace_direct()
  tracing: Add missing "inline" in stub function of latency_fsnotify()
  tracing: Remove stray tab in TRACE_EVAL_MAP_FILE's help text
  tracing: Use seq_buf_hex_dump() to dump buffers
  ...
 2019-11-27 11:42:01 -08:00
Linus Torvalds
6a0e20cd8c First set of RISC-V updates for v5.5-rc1 
New features:
 
 - SECCOMP support
 
 - nommu support
 
 - SBI-less system support
 
 - M-Mode support
 
 - TLB flush optimizations
 
 Other improvements:
 
 - Pass the complete RISC-V ISA string supported by the CPU cores to
   userspace, rather than redacting parts of it in the kernel
 
 - Add platform DMA IP block data to the HiFive Unleashed board DT file
 
 - Add Makefile support for BZ2, LZ4, LZMA, LZO kernel image
   compression formats, in line with other architectures
 
 Cleanups:
 
 - Remove unnecessary PTE_PARENT_SIZE macro
 
 - Standardize include guard naming across arch/riscv
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEElRDoIDdEz9/svf2Kx4+xDQu9KksFAl3dkMcACgkQx4+xDQu9
 KksoQA/+MZdtMrSe+j5yep7ZO803ivdS5tPCjNI06An2Ps8OJmJKoU8zSCIbygfM
 xIQ8R5KVLjd1DTW3SKNrL3bUsH0PdwGHKj69z0gMA01kGBe5CfJEzHw03U4It++t
 xaPAYJje99xtdEzZMro/Z+/Gsz/XM5SDZmY4i6quSlHOmL0HP6zftk3jPvxO+XtD
 7unQJSHuZElqs984OmR+6DUTiaIlJ4P+/xxlFydswq19/tDNCXpukLhMHkOND3W+
 3dBHAp9U18dz2I8lD3xlppVbvgCnud7z+xa+XY1Q/BluoYIEe6714S+9lr8TCdTP
 43wL9hSvbDPyaydnmKU7VqwdcWrbVQkA7H3GtxeiUZYvyDdidk9sARqg0n6uoedw
 48uRfeI0jCQXh6XdFNMCqNgYPpcpHY3isMKVCi2U6TT0fNdUUC3f62qsOIP0vQXh
 4hDys5JzIoBKv8nz/ap+1xzUluBt6FGmySPlTbd8ryn2m2Yd0EsHjywcEGRJMrlM
 KcOYgLAKcr9rRF4ap/NqQy74AvC+pOcDVeUHPD0WXYDRQn6L0wbp8YElzRf8W1BC
 b7osrRSNLfzC2LsEUEK+qYHrT4+cuWBbkuobAEHMY/OnLW1OKEifZQIdknAE1/yg
 n2qy4DuA6qta+Q1GiH8OOt9AEYHPw+SDP3+qFaJK5ZZMb3v565A=
 =nbwY
 -----END PGP SIGNATURE-----

Merge tag 'riscv/for-v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V updates from Paul Walmsley:
 "New features:
   - SECCOMP support
   - nommu support
   - SBI-less system support
   - M-Mode support
   - TLB flush optimizations

  Other improvements:
   - Pass the complete RISC-V ISA string supported by the CPU cores to
     userspace, rather than redacting parts of it in the kernel
   - Add platform DMA IP block data to the HiFive Unleashed board DT
     file
   - Add Makefile support for BZ2, LZ4, LZMA, LZO kernel image
     compression formats, in line with other architectures

  Cleanups:
   - Remove unnecessary PTE_PARENT_SIZE macro
   - Standardize include guard naming across arch/riscv"

* tag 'riscv/for-v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (22 commits)
  riscv: provide a flat image loader
  riscv: add nommu support
  riscv: clear the instruction cache and all registers when booting
  riscv: read the hart ID from mhartid on boot
  riscv: provide native clint access for M-mode
  riscv: dts: add support for PDMA device of HiFive Unleashed Rev A00
  riscv: add support for MMIO access to the timer registers
  riscv: implement remote sfence.i using IPIs
  riscv: cleanup the default power off implementation
  riscv: poison SBI calls for M-mode
  riscv: don't allow selecting SBI based drivers for M-mode
  RISC-V: Add multiple compression image format.
  riscv: clean up the macro format in each header file
  riscv: Use PMD_SIZE to replace PTE_PARENT_SIZE
  riscv: abstract out CSR names for supervisor vs machine mode
  riscv: separate MMIO functions into their own header file
  riscv: enter WFI in default_power_off() if SBI does not shutdown
  RISC-V: Issue a tlb page flush if possible
  RISC-V: Issue a local tlbflush if possible.
  RISC-V: Do not invoke SBI call if cpumask is empty
  ...
 2019-11-27 11:27:59 -08:00
Linus Torvalds
0dd09bc02c Staging / IIO patches for 5.5-rc1 
Here is the big staging and iio set of patches for the 5.5-rc1 release.
 
 It's the usual huge collection of cleanup patches all over the
 drivers/staging/ area, along with a new staging driver, and a bunch of
 new IIO drivers as well.
 
 Full details are in the shortlog, but all of these have been in
 linux-next for a long time with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 
 iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXd6lVQ8cZ3JlZ0Brcm9h
 aC5jb20ACgkQMUfUDdst+ylFnwCgyvZ62uUyQTRey0zvNTe3I4fY9L4AnAnrz3ZC
 U6ZA2+Uj3O6qhAr5frRu
 =uv8S
 -----END PGP SIGNATURE-----

Merge tag 'staging-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging / iio updates from Greg KH:
 "Here is the big staging and iio set of patches for the 5.5-rc1
  release.

  It's the usual huge collection of cleanup patches all over the
  drivers/staging/ area, along with a new staging driver, and a bunch of
  new IIO drivers as well.

  Full details are in the shortlog, but all of these have been in
  linux-next for a long time with no reported issues"

* tag 'staging-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (548 commits)
  staging: vchiq: Have vchiq_dump_* functions return an error code
  staging: vchiq: Refactor indentation in vchiq_dump_* functions
  staging: fwserial: Fix Kconfig indentation (seven spaces)
  staging: vchiq_dump: Replace min with min_t
  staging: vchiq: Fix block comment format in vchiq_dump()
  staging: octeon: indent with tabs instead of spaces
  staging: comedi: usbduxfast: usbduxfast_ai_cmdtest rounding error
  staging: most: core: remove sysfs attr remove_link
  staging: vc04: Fix Kconfig indentation
  staging: pi433: Fix Kconfig indentation
  staging: nvec: Fix Kconfig indentation
  staging: most: Fix Kconfig indentation
  staging: fwserial: Fix Kconfig indentation
  staging: fbtft: Fix Kconfig indentation
  fbtft: Drop OF dependency
  fbtft: Make use of device property API
  fbtft: Drop useless #ifdef CONFIG_OF and dead code
  fbtft: Describe function parameters in kernel-doc
  fbtft: Make sure string is NULL terminated
  staging: rtl8723bs: remove set but not used variable 'change', 'pos'
  ...
 2019-11-27 10:57:52 -08:00
Linus Torvalds
59274c7164 USB patches for 5.5-rc1 
Here is the big set of USB patches for 5.5-rc1
 
 Lots of little things in here:
   - typec updates and additions
   - usb-serial drivers cleanups and fixes
   - misc USB drivers cleanups and fixes
   - gadget drivers new features and controllers added
   - usual xhci additions
   - other minor changes
 
 All of these have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 
 iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXd5+Iw8cZ3JlZ0Brcm9h
 aC5jb20ACgkQMUfUDdst+ylA4wCbB3P206oHeHLBe9Eika3D8gM9/fMAn2oWlmpB
 Xh7wr30FGC02zU/KBpJ1
 =U5qC
 -----END PGP SIGNATURE-----

Merge tag 'usb-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB updates from Greg KH:
 "Here is the big set of USB patches for 5.5-rc1

  Lots of little things in here:
   - typec updates and additions
   - usb-serial drivers cleanups and fixes
   - misc USB drivers cleanups and fixes
   - gadget drivers new features and controllers added
   - usual xhci additions
   - other minor changes

  All of these have been in linux-next with no reported issues"

* tag 'usb-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (223 commits)
  usb: gadget: udc: gr_udc: create debugfs directory under usb root
  usb: gadget: atmel: create debugfs directory under usb root
  usb: musb: create debugfs directory under usb root
  usb: serial: Fix Kconfig indentation
  usb: misc: Fix Kconfig indentation
  usb: gadget: Fix Kconfig indentation
  usb: host: Fix Kconfig indentation
  usb: dwc3: Fix Kconfig indentation
  usb: gadget: configfs: Fix missing spin_lock_init()
  usb-storage: Disable UAS on JMicron SATA enclosure
  USB: documentation: flags on usb-storage versus UAS
  USB: uas: heed CAPACITY_HEURISTICS
  USB: uas: honor flag to avoid CAPACITY16
  usb: host: xhci-tegra: Correct phy enable sequence
  usb-serial: cp201x: support Mark-10 digital force gauge
  usb: chipidea: imx: pinctrl for HSIC is optional
  usb: chipidea: imx: refine the error handling for hsic
  usb: chipidea: imx: change hsic power regulator as optional
  usb: chipidea: imx: check data->usbmisc_data against NULL before access
  usb: chipidea: core: change vbus-regulator as optional
  ...
 2019-11-27 10:46:34 -08:00
Linus Torvalds
9e7a03233e Power management updates for 5.5-rc1 
- Use nanoseconds (instead of microseconds) as the unit of time in
    the cpuidle core and simplify checks for disabled idle states in
    the idle loop (Rafael Wysocki).
 
  - Fix and clean up the teo cpuidle governor (Rafael Wysocki).
 
  - Fix the cpuidle registration error code path (Zhenzhong Duan).
 
  - Avoid excessive vmexits in the ACPI cpuidle driver (Yin Fengwei).
 
  - Extend the idle injection infrastructure to be able to measure the
    requested duration in nanoseconds and to allow an exit latency
    limit for idle states to be specified (Daniel Lezcano).
 
  - Fix cpufreq driver registration and clarify a comment in the
    cpufreq core (Viresh Kumar).
 
  - Add NULL checks to the show() and store() methods of sysfs
    attributes exposed by cpufreq (Kai Shen).
 
  - Update cpufreq drivers:
 
    * Fix for a plain int as pointer warning from sparse in
      intel_pstate (Jamal Shareef).
 
    * Fix for a hardcoded number of CPUs and stack bloat in the
      powernv driver (John Hubbard).
 
    * Updates to the ti-cpufreq driver and DT files to support new
      platforms and migrate bindings from opp-v1 to opp-v2 (Adam Ford,
      H. Nikolaus Schaller).
 
    * Merging of the arm_big_little and vexpress-spc drivers and
      related cleanup (Sudeep Holla).
 
    * Fix for imx's default speed grade value (Anson Huang).
 
    * Minor cleanup of the s3c64xx driver (Nathan Chancellor).
 
    * CPU speed bin detection fix for sun50i (Ondrej Jirman).
 
  - Appoint Chanwoo Choi as the new devfreq maintainer.
 
  - Update the devfreq core:
 
    * Check NULL governor in available_governors_show sysfs to prevent
      showing wrong governor information and fix a race condition
      between devfreq_update_status() and trans_stat_show() (Leonard
      Crestez).
 
    * Add new 'interrupt-driven' flag for devfreq governors to allow
      interrupt-driven governors to prevent the devfreq core from
      polling devices for status (Dmitry Osipenko).
 
    * Improve an error message in devfreq_add_device() (Matthias
      Kaehlcke).
 
  - Update devfreq drivers:
 
    * tegra30 driver fixes and cleanups (Dmitry Osipenko).
 
    * Removal of unused property from dt-binding documentation for
      the exynos-bus driver (Kamil Konieczny).
 
    * exynos-ppmu cleanup and DT bindings update (Lukasz Luba, Marek
      Szyprowski).
 
  - Add new CPU IDs for CometLake Mobile and Desktop to the Intel RAPL
    power capping driver (Zhang Rui).
 
  - Allow device initialization in the generic power domains (genpd)
    framework to be more straightforward and clean it up (Ulf Hansson).
 
  - Add support for adjusting OPP voltages at run time to the OPP
    framework (Stephen Boyd).
 
  - Avoid freeing memory that has never been allocated in the
    hibernation core (Andy Whitcroft).
 
  - Clean up function headers in a header file and coding style in the
    wakeup IRQs handling code (Ulf Hansson, Xiaofei Tan).
 
  - Clean up the SmartReflex adaptive voltage scaling (AVS) driver for
    ARM (Ben Dooks, Geert Uytterhoeven).
 
  - Wrap power management documentation to fit in 80 columns (Bjorn
    Helgaas).
 
  - Add pm-graph utility entry to MAINTAINERS (Todd Brandt).
 
  - Update the cpupower utility:
 
    * Fix the handling of set and info subcommands (Abhishek Goel).
 
    * Fix build warnings (Nathan Chancellor).
 
    * Improve mperf_monitor handling (Janakarajan Natarajan).
 -----BEGIN PGP SIGNATURE-----
 
 iQJGBAABCAAwFiEE4fcc61cGeeHD/fCwgsRv/nhiVHEFAl3dHGYSHHJqd0Byand5
 c29ja2kubmV0AAoJEILEb/54YlRxMcgP/1bMSkxlRHFOXYSRwS4YcvkUjlBHrCSi
 3qGRyYwhc+eRLqRc+2tcmQeQEeQRBqUt8etp7/9WxqS3nic/3Vdf6AFuhSpmJzo1
 6JTEutHMU5eP8lwQuKoUCJncCNdIfEOkd5T35E12W/ar5PwyJio0UByZJBnJBjD/
 p7/713ucq6ZH95OGncmCJ1S1UslFCZrSS2RRigDInu8gpEssnwN9zwaJbzUYrZHj
 BmnKpBpT8FdLmkpbOtmmiT7q2ZGpUEHhkaO916Knf/+BFdvydTXoR90FVvXKy8Zr
 QpOxaTdQB2ADifUa5zs8klVP6otmZhEO9vz8hVMUWGziqagObykQngzl8tqrKEBh
 hLI8eEG1IkEBCv5ThQbLcoaRXNpwriXXfvWPTPB8s84HJxNZ09F6pXsv1SLh96qC
 lj8Q5Yy2a3tlpsg4LB58XoJ54gOtlh8bWKkM0FytrFI/IP+HT4TUu/Rxgp1nDbGd
 tKzLvpn4Yo2h10seeDbYk3l79mogUYj50RmwjjPn+9RwS/Df4eIpNb6ibllGZUN/
 zcPZH5xlVfQRl2LKDufVN0nYSnoMZY/fU05p9XbUiJWd80LHYOb4Em1N6h/FNOyl
 alDhVwlxEvc2BQwL/gjYmN6Qxc7SsPTBrSGVwjWYY+FghOYQd/wBDQqQUeM21QKg
 ChOE3z/F/26r
 =GJvT
 -----END PGP SIGNATURE-----

Merge tag 'pm-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These include cpuidle changes to use nanoseconds (instead of
  microseconds) as the unit of time and to simplify checks for disabled
  idle states in the idle loop, some cpuidle fixes and governor updates,
  assorted cpufreq updates (driver updates mostly and a few core fixes
  and cleanups), devfreq updates (dominated by the tegra30 driver
  changes), new CPU IDs for the RAPL power capping driver, relatively
  minor updates of the generic power domains (genpd) and operation
  performance points (OPP) frameworks, and assorted fixes and cleanups.

  There are also two maintainer information updates: Chanwoo Choi will
  be maintaining the devfreq subsystem going forward and Todd Brandt is
  going to maintain the pm-graph utility (created by him).

  Specifics:

   - Use nanoseconds (instead of microseconds) as the unit of time in
     the cpuidle core and simplify checks for disabled idle states in
     the idle loop (Rafael Wysocki)

   - Fix and clean up the teo cpuidle governor (Rafael Wysocki)

   - Fix the cpuidle registration error code path (Zhenzhong Duan)

   - Avoid excessive vmexits in the ACPI cpuidle driver (Yin Fengwei)

   - Extend the idle injection infrastructure to be able to measure the
     requested duration in nanoseconds and to allow an exit latency
     limit for idle states to be specified (Daniel Lezcano)

   - Fix cpufreq driver registration and clarify a comment in the
     cpufreq core (Viresh Kumar)

   - Add NULL checks to the show() and store() methods of sysfs
     attributes exposed by cpufreq (Kai Shen)

   - Update cpufreq drivers:
      * Fix for a plain int as pointer warning from sparse in
        intel_pstate (Jamal Shareef)
      * Fix for a hardcoded number of CPUs and stack bloat in the
        powernv driver (John Hubbard)
      * Updates to the ti-cpufreq driver and DT files to support new
        platforms and migrate bindings from opp-v1 to opp-v2 (Adam Ford,
        H. Nikolaus Schaller)
      * Merging of the arm_big_little and vexpress-spc drivers and
        related cleanup (Sudeep Holla)
      * Fix for imx's default speed grade value (Anson Huang)
      * Minor cleanup of the s3c64xx driver (Nathan Chancellor)
      * CPU speed bin detection fix for sun50i (Ondrej Jirman)

   - Appoint Chanwoo Choi as the new devfreq maintainer.

   - Update the devfreq core:
      * Check NULL governor in available_governors_show sysfs to prevent
        showing wrong governor information and fix a race condition
        between devfreq_update_status() and trans_stat_show() (Leonard
        Crestez)
      * Add new 'interrupt-driven' flag for devfreq governors to allow
        interrupt-driven governors to prevent the devfreq core from
        polling devices for status (Dmitry Osipenko)
      * Improve an error message in devfreq_add_device() (Matthias
        Kaehlcke)

   - Update devfreq drivers:
      * tegra30 driver fixes and cleanups (Dmitry Osipenko)
      * Removal of unused property from dt-binding documentation for the
        exynos-bus driver (Kamil Konieczny)
      * exynos-ppmu cleanup and DT bindings update (Lukasz Luba, Marek
        Szyprowski)

   - Add new CPU IDs for CometLake Mobile and Desktop to the Intel RAPL
     power capping driver (Zhang Rui)

   - Allow device initialization in the generic power domains (genpd)
     framework to be more straightforward and clean it up (Ulf Hansson)

   - Add support for adjusting OPP voltages at run time to the OPP
     framework (Stephen Boyd)

   - Avoid freeing memory that has never been allocated in the
     hibernation core (Andy Whitcroft)

   - Clean up function headers in a header file and coding style in the
     wakeup IRQs handling code (Ulf Hansson, Xiaofei Tan)

   - Clean up the SmartReflex adaptive voltage scaling (AVS) driver for
     ARM (Ben Dooks, Geert Uytterhoeven)

   - Wrap power management documentation to fit in 80 columns (Bjorn
     Helgaas)

   - Add pm-graph utility entry to MAINTAINERS (Todd Brandt)

   - Update the cpupower utility:
      * Fix the handling of set and info subcommands (Abhishek Goel)
      * Fix build warnings (Nathan Chancellor)
      * Improve mperf_monitor handling (Janakarajan Natarajan)"

* tag 'pm-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (83 commits)
  PM: Wrap documentation to fit in 80 columns
  cpuidle: Pass exit latency limit to cpuidle_use_deepest_state()
  cpuidle: Allow idle injection to apply exit latency limit
  cpuidle: Introduce cpuidle_driver_state_disabled() for driver quirks
  cpuidle: teo: Avoid code duplication in conditionals
  cpufreq: Register drivers only after CPU devices have been registered
  cpuidle: teo: Avoid using "early hits" incorrectly
  cpuidle: teo: Exclude cpuidle overhead from computations
  PM / Domains: Convert to dev_to_genpd_safe() in genpd_syscore_switch()
  mmc: tmio: Avoid boilerplate code in ->runtime_suspend()
  PM / Domains: Implement the ->start() callback for genpd
  PM / Domains: Introduce dev_pm_domain_start()
  ARM: OMAP2+: SmartReflex: add omap_sr_pdata definition
  PM / wakeirq: remove unnecessary parentheses
  power: avs: smartreflex: Remove superfluous cast in debugfs_create_file() call
  cpuidle: Use nanoseconds as the unit of time
  PM / OPP: Support adjusting OPP voltages at runtime
  PM / core: Clean up some function headers in power.h
  cpufreq: Add NULL checks to show() and store() methods of cpufreq
  cpufreq: intel_pstate: Fix plain int as pointer warning from sparse
  ...
 2019-11-26 19:06:44 -08:00
Linus Torvalds
168829ad09 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull locking updates from Ingo Molnar:
 "The main changes in this cycle were:

   - A comprehensive rewrite of the robust/PI futex code's exit handling
     to fix various exit races. (Thomas Gleixner et al)

   - Rework the generic REFCOUNT_FULL implementation using
     atomic_fetch_* operations so that the performance impact of the
     cmpxchg() loops is mitigated for common refcount operations.

     With these performance improvements the generic implementation of
     refcount_t should be good enough for everybody - and this got
     confirmed by performance testing, so remove ARCH_HAS_REFCOUNT and
     REFCOUNT_FULL entirely, leaving the generic implementation enabled
     unconditionally. (Will Deacon)

   - Other misc changes, fixes, cleanups"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)
  lkdtm: Remove references to CONFIG_REFCOUNT_FULL
  locking/refcount: Remove unused 'refcount_error_report()' function
  locking/refcount: Consolidate implementations of refcount_t
  locking/refcount: Consolidate REFCOUNT_{MAX,SATURATED} definitions
  locking/refcount: Move saturation warnings out of line
  locking/refcount: Improve performance of generic REFCOUNT_FULL code
  locking/refcount: Move the bulk of the REFCOUNT_FULL implementation into the <linux/refcount.h> header
  locking/refcount: Remove unused refcount_*_checked() variants
  locking/refcount: Ensure integer operands are treated as signed
  locking/refcount: Define constants for saturation and max refcount values
  futex: Prevent exit livelock
  futex: Provide distinct return value when owner is exiting
  futex: Add mutex around futex exit
  futex: Provide state handling for exec() as well
  futex: Sanitize exit state handling
  futex: Mark the begin of futex exit explicitly
  futex: Set task::futex_state to DEAD right after handling futex exit
  futex: Split futex_mm_release() for exit/exec
  exit/exec: Seperate mm_release()
  futex: Replace PF_EXITPIDONE with a state
  ...
 2019-11-26 16:02:40 -08:00
Linus Torvalds
1ae78780ed Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull RCU updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Dynamic tick (nohz) updates, perhaps most notably changes to force
     the tick on when needed due to lengthy in-kernel execution on CPUs
     on which RCU is waiting.

   - Linux-kernel memory consistency model updates.

   - Replace rcu_swap_protected() with rcu_prepace_pointer().

   - Torture-test updates.

   - Documentation updates.

   - Miscellaneous fixes"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (51 commits)
  security/safesetid: Replace rcu_swap_protected() with rcu_replace_pointer()
  net/sched: Replace rcu_swap_protected() with rcu_replace_pointer()
  net/netfilter: Replace rcu_swap_protected() with rcu_replace_pointer()
  net/core: Replace rcu_swap_protected() with rcu_replace_pointer()
  bpf/cgroup: Replace rcu_swap_protected() with rcu_replace_pointer()
  fs/afs: Replace rcu_swap_protected() with rcu_replace_pointer()
  drivers/scsi: Replace rcu_swap_protected() with rcu_replace_pointer()
  drm/i915: Replace rcu_swap_protected() with rcu_replace_pointer()
  x86/kvm/pmu: Replace rcu_swap_protected() with rcu_replace_pointer()
  rcu: Upgrade rcu_swap_protected() to rcu_replace_pointer()
  rcu: Suppress levelspread uninitialized messages
  rcu: Fix uninitialized variable in nocb_gp_wait()
  rcu: Update descriptions for rcu_future_grace_period tracepoint
  rcu: Update descriptions for rcu_nocb_wake tracepoint
  rcu: Remove obsolete descriptions for rcu_barrier tracepoint
  rcu: Ensure that ->rcu_urgent_qs is set before resched IPI
  workqueue: Convert for_each_wq to use built-in list check
  rcu: Several rcu_segcblist functions can be static
  rcu: Remove unused function hlist_bl_del_init_rcu()
  Documentation: Rename rcu_node_context_switch() to rcu_note_context_switch()
  ...
 2019-11-26 15:42:43 -08:00
Linus Torvalds
3f59dbcace Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull perf updates from Ingo Molnar:
 "The main kernel side changes in this cycle were:

   - Various Intel-PT updates and optimizations (Alexander Shishkin)

   - Prohibit kprobes on Xen/KVM emulate prefixes (Masami Hiramatsu)

   - Add support for LSM and SELinux checks to control access to the
     perf syscall (Joel Fernandes)

   - Misc other changes, optimizations, fixes and cleanups - see the
     shortlog for details.

  There were numerous tooling changes as well - 254 non-merge commits.
  Here are the main changes - too many to list in detail:

   - Enhancements to core tooling infrastructure, perf.data, libperf,
     libtraceevent, event parsing, vendor events, Intel PT, callchains,
     BPF support and instruction decoding.

   - There were updates to the following tools:

        perf annotate
        perf diff
        perf inject
        perf kvm
        perf list
        perf maps
        perf parse
        perf probe
        perf record
        perf report
        perf script
        perf stat
        perf test
        perf trace

   - And a lot of other changes: please see the shortlog and Git log for
     more details"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (279 commits)
  perf parse: Fix potential memory leak when handling tracepoint errors
  perf probe: Fix spelling mistake "addrees" -> "address"
  libtraceevent: Fix memory leakage in copy_filter_type
  libtraceevent: Fix header installation
  perf intel-bts: Does not support AUX area sampling
  perf intel-pt: Add support for decoding AUX area samples
  perf intel-pt: Add support for recording AUX area samples
  perf pmu: When using default config, record which bits of config were changed by the user
  perf auxtrace: Add support for queuing AUX area samples
  perf session: Add facility to peek at all events
  perf auxtrace: Add support for dumping AUX area samples
  perf inject: Cut AUX area samples
  perf record: Add aux-sample-size config term
  perf record: Add support for AUX area sampling
  perf auxtrace: Add support for AUX area sample recording
  perf auxtrace: Move perf_evsel__find_pmu()
  perf record: Add a function to test for kernel support for AUX area sampling
  perf tools: Add kernel AUX area sampling definitions
  perf/core: Make the mlock accounting simple again
  perf report: Jump to symbol source view from total cycles view
  ...
 2019-11-26 15:04:47 -08:00
Linus Torvalds
ab851d49f6 Merge branch 'x86-iopl-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 iopl updates from Ingo Molnar:
 "This implements a nice simplification of the iopl and ioperm code that
  Thomas Gleixner discovered: we can implement the IO privilege features
  of the iopl system call by using the IO permission bitmap in
  permissive mode, while trapping CLI/STI/POPF/PUSHF uses in user-space
  if they change the interrupt flag.

  This implements that feature, with testing facilities and related
  cleanups"

[ "Simplification" may be an over-statement. The main goal is to avoid
  the cli/sti of iopl by effectively implementing the IO port access
  parts of iopl in terms of ioperm.

  This may end up not workign well in case people actually depend on
  cli/sti being available, or if there are mixed uses of iopl and
  ioperm. We will see..       - Linus ]

* 'x86-iopl-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
  x86/ioperm: Fix use of deprecated config option
  x86/entry/32: Clarify register saving in __switch_to_asm()
  selftests/x86/iopl: Extend test to cover IOPL emulation
  x86/ioperm: Extend IOPL config to control ioperm() as well
  x86/iopl: Remove legacy IOPL option
  x86/iopl: Restrict iopl() permission scope
  x86/iopl: Fixup misleading comment
  selftests/x86/ioperm: Extend testing so the shared bitmap is exercised
  x86/ioperm: Share I/O bitmap if identical
  x86/ioperm: Remove bitmap if all permissions dropped
  x86/ioperm: Move TSS bitmap update to exit to user work
  x86/ioperm: Add bitmap sequence number
  x86/ioperm: Move iobitmap data into a struct
  x86/tss: Move I/O bitmap data into a seperate struct
  x86/io: Speedup schedule out of I/O bitmap user
  x86/ioperm: Avoid bitmap allocation if no permissions are set
  x86/ioperm: Simplify first ioperm() invocation logic
  x86/iopl: Cleanup include maze
  x86/tss: Fix and move VMX BUILD_BUG_ON()
  x86/cpu: Unify cpu_init()
  ...
 2019-11-26 11:12:02 -08:00
Linus Torvalds
1d87200446 Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 asm updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Cross-arch changes to move the linker sections for NOTES and
     EXCEPTION_TABLE into the RO_DATA area, where they belong on most
     architectures. (Kees Cook)

   - Switch the x86 linker fill byte from x90 (NOP) to 0xcc (INT3), to
     trap jumps into the middle of those padding areas instead of
     sliding execution. (Kees Cook)

   - A thorough cleanup of symbol definitions within x86 assembler code.
     The rather randomly named macros got streamlined around a
     (hopefully) straightforward naming scheme:

        SYM_START(name, linkage, align...)
        SYM_END(name, sym_type)

        SYM_FUNC_START(name)
        SYM_FUNC_END(name)

        SYM_CODE_START(name)
        SYM_CODE_END(name)

        SYM_DATA_START(name)
        SYM_DATA_END(name)

     etc - with about three times of these basic primitives with some
     label, local symbol or attribute variant, expressed via postfixes.

     No change in functionality intended. (Jiri Slaby)

   - Misc other changes, cleanups and smaller fixes"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (67 commits)
  x86/entry/64: Remove pointless jump in paranoid_exit
  x86/entry/32: Remove unused resume_userspace label
  x86/build/vdso: Remove meaningless CFLAGS_REMOVE_*.o
  m68k: Convert missed RODATA to RO_DATA
  x86/vmlinux: Use INT3 instead of NOP for linker fill bytes
  x86/mm: Report actual image regions in /proc/iomem
  x86/mm: Report which part of kernel image is freed
  x86/mm: Remove redundant address-of operators on addresses
  xtensa: Move EXCEPTION_TABLE to RO_DATA segment
  powerpc: Move EXCEPTION_TABLE to RO_DATA segment
  parisc: Move EXCEPTION_TABLE to RO_DATA segment
  microblaze: Move EXCEPTION_TABLE to RO_DATA segment
  ia64: Move EXCEPTION_TABLE to RO_DATA segment
  h8300: Move EXCEPTION_TABLE to RO_DATA segment
  c6x: Move EXCEPTION_TABLE to RO_DATA segment
  arm64: Move EXCEPTION_TABLE to RO_DATA segment
  alpha: Move EXCEPTION_TABLE to RO_DATA segment
  x86/vmlinux: Move EXCEPTION_TABLE to RO_DATA segment
  x86/vmlinux: Actually use _etext for the end of the text segment
  vmlinux.lds.h: Allow EXCEPTION_TABLE to live in RO_DATA
  ...
 2019-11-26 10:42:40 -08:00
Linus Torvalds
5c4a1c090d Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 fixes from Ingo Molnar:
 "These are the fixes left over from the v5.4 cycle:

   - Various low level 32-bit entry code fixes and improvements by Andy
     Lutomirski, Peter Zijlstra and Thomas Gleixner.

   - Fix 32-bit Xen PV breakage, by Jan Beulich"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/entry/32: Fix FIXUP_ESPFIX_STACK with user CR3
  x86/pti/32: Calculate the various PTI cpu_entry_area sizes correctly, make the CPU_ENTRY_AREA_PAGES assert precise
  selftests/x86/sigreturn/32: Invalidate DS and ES when abusing the kernel
  selftests/x86/mov_ss_trap: Fix the SYSENTER test
  x86/entry/32: Fix NMI vs ESPFIX
  x86/entry/32: Unwind the ESPFIX stack earlier on exception entry
  x86/entry/32: Move FIXUP_FRAME after pushing %fs in SAVE_ALL
  x86/entry/32: Use %ss segment where required
  x86/entry/32: Fix IRET exception
  x86/cpu_entry_area: Add guard page for entry stack on 32bit
  x86/pti/32: Size initial_page_table correctly
  x86/doublefault/32: Fix stack canaries in the double fault handler
  x86/xen/32: Simplify ring check in xen_iret_crit_fixup()
  x86/xen/32: Make xen_iret_crit_fixup() independent of frame layout
  x86/stackframe/32: Repair 32-bit Xen PV
 2019-11-26 10:12:28 -08:00
Linus Torvalds
a25bbc2644 Merge branches 'x86-cpu-for-linus' and 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 cpu and fpu updates from Ingo Molnar:

 - math-emu fixes

 - CPUID updates

 - sanity-check RDRAND output to see whether the CPU at least pretends
   to produce random data

 - various unaligned-access across cachelines fixes in preparation of
   hardware level split-lock detection

 - fix MAXSMP constraints to not allow !CPUMASK_OFFSTACK kernels with
   larger than 512 NR_CPUS

 - misc FPU related cleanups

* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu: Align the x86_capability array to size of unsigned long
  x86/cpu: Align cpu_caps_cleared and cpu_caps_set to unsigned long
  x86/umip: Make the comments vendor-agnostic
  x86/Kconfig: Rename UMIP config parameter
  x86/Kconfig: Enforce limit of 512 CPUs with MAXSMP and no CPUMASK_OFFSTACK
  x86/cpufeatures: Add feature bit RDPRU on AMD
  x86/math-emu: Limit MATH_EMULATION to 486SX compatibles
  x86/math-emu: Check __copy_from_user() result
  x86/rdrand: Sanity-check RDRAND output

* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fpu: Use XFEATURE_FP/SSE enum values instead of hardcoded numbers
  x86/fpu: Shrink space allocated for xstate_comp_offsets
  x86/fpu: Update stale variable name in comment
 2019-11-26 08:58:08 -08:00
Linus Torvalds
fd2615908d Merge branches 'core-objtool-for-linus', 'x86-cleanups-for-linus' and 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 objtool, cleanup, and apic updates from Ingo Molnar:
 "Objtool:

   - Fix a gawk 5.0 incompatibility in gen-insn-attr-x86.awk. Most
     distros are still on gawk 4.2.x.

  Cleanup:

   - Misc cleanups, plus the removal of obsolete code such as Calgary
     IOMMU support, which code hasn't seen any real testing in a long
     time and there's no known users left.

  apic:

   - Two changes: a cleanup and a fix for an (old) race for oneshot
     threaded IRQ handlers"

* 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/insn: Fix awk regexp warnings

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Remove unused asm/rio.h
  x86: Fix typos in comments
  x86/pci: Remove #ifdef __KERNEL__ guard from <asm/pci.h>
  x86/pci: Remove pci_64.h
  x86: Remove the calgary IOMMU driver
  x86/apic, x86/uprobes: Correct parameter names in kernel-doc comments
  x86/kdump: Remove the unused crash_copy_backup_region()
  x86/nmi: Remove stale EDAC include leftover

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/ioapic: Rename misnamed functions
  x86/ioapic: Prevent inconsistent state when moving an interrupt
 2019-11-26 08:21:54 -08:00
Rafael J. Wysocki
e350b60f4e Merge branches 'pm-avs', 'pm-docs' and 'pm-tools' 
* pm-avs:
  ARM: OMAP2+: SmartReflex: add omap_sr_pdata definition
  power: avs: smartreflex: Remove superfluous cast in debugfs_create_file() call

* pm-docs:
  PM: Wrap documentation to fit in 80 columns

* pm-tools:
  cpupower: ToDo: Update ToDo with ideas for per_cpu_schedule handling
  cpupower: mperf_monitor: Update cpupower to use the RDPRU instruction
  cpupower: mperf_monitor: Introduce per_cpu_schedule flag
  cpupower: Move needs_root variable into a sub-struct
  cpupower : Handle set and info subcommands correctly
  pm-graph info added to MAINTAINERS
  tools/power/cpupower: Fix initializer override in hsw_ext_cstates
 2019-11-26 10:28:34 +01:00
Linus Torvalds
386403a115 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 
Pull networking updates from David Miller:
 "Another merge window, another pull full of stuff:

   1) Support alternative names for network devices, from Jiri Pirko.

   2) Introduce per-netns netdev notifiers, also from Jiri Pirko.

   3) Support MSG_PEEK in vsock/virtio, from Matias Ezequiel Vara
      Larsen.

   4) Allow compiling out the TLS TOE code, from Jakub Kicinski.

   5) Add several new tracepoints to the kTLS code, also from Jakub.

   6) Support set channels ethtool callback in ena driver, from Sameeh
      Jubran.

   7) New SCTP events SCTP_ADDR_ADDED, SCTP_ADDR_REMOVED,
      SCTP_ADDR_MADE_PRIM, and SCTP_SEND_FAILED_EVENT. From Xin Long.

   8) Add XDP support to mvneta driver, from Lorenzo Bianconi.

   9) Lots of netfilter hw offload fixes, cleanups and enhancements,
      from Pablo Neira Ayuso.

  10) PTP support for aquantia chips, from Egor Pomozov.

  11) Add UDP segmentation offload support to igb, ixgbe, and i40e. From
      Josh Hunt.

  12) Add smart nagle to tipc, from Jon Maloy.

  13) Support L2 field rewrite by TC offloads in bnxt_en, from Venkat
      Duvvuru.

  14) Add a flow mask cache to OVS, from Tonghao Zhang.

  15) Add XDP support to ice driver, from Maciej Fijalkowski.

  16) Add AF_XDP support to ice driver, from Krzysztof Kazimierczak.

  17) Support UDP GSO offload in atlantic driver, from Igor Russkikh.

  18) Support it in stmmac driver too, from Jose Abreu.

  19) Support TIPC encryption and auth, from Tuong Lien.

  20) Introduce BPF trampolines, from Alexei Starovoitov.

  21) Make page_pool API more numa friendly, from Saeed Mahameed.

  22) Introduce route hints to ipv4 and ipv6, from Paolo Abeni.

  23) Add UDP segmentation offload to cxgb4, Rahul Lakkireddy"

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1857 commits)
  libbpf: Fix usage of u32 in userspace code
  mm: Implement no-MMU variant of vmalloc_user_node_flags
  slip: Fix use-after-free Read in slip_open
  net: dsa: sja1105: fix sja1105_parse_rgmii_delays()
  macvlan: schedule bc_work even if error
  enetc: add support Credit Based Shaper(CBS) for hardware offload
  net: phy: add helpers phy_(un)lock_mdio_bus
  mdio_bus: don't use managed reset-controller
  ax88179_178a: add ethtool_op_get_ts_info()
  mlxsw: spectrum_router: Fix use of uninitialized adjacency index
  mlxsw: spectrum_router: After underlay moves, demote conflicting tunnels
  bpf: Simplify __bpf_arch_text_poke poke type handling
  bpf: Introduce BPF_TRACE_x helper for the tracing tests
  bpf: Add bpf_jit_blinding_enabled for !CONFIG_BPF_JIT
  bpf, testing: Add various tail call test cases
  bpf, x86: Emit patchable direct jump as tail call
  bpf: Constant map key tracking for prog array pokes
  bpf: Add poke dependency tracking for prog array maps
  bpf: Add initial poke descriptor table for jit images
  bpf: Move owner type, jited info into array auxiliary data
  ...
 2019-11-25 20:02:57 -08:00
Linus Torvalds
f838767555 Livepatching changes for 5.5 
-----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEESH4wyp42V4tXvYsjUqAMR0iAlPIFAl3bz1gACgkQUqAMR0iA
 lPI5fw//db5dOqAvBu/fz4k38Mc30okgCjtRh0+vhFXCCUXauQv2IhI19J2IiPpy
 4t/CjaUk2QSB06NDNUxt7XsuR0yAF4E0nJHUmkDKkN8UFsi7jAjxJ/92zH3x/LE0
 YWtVoWjGduO+QfLVlP22VVYh1pX5kOxXG2WTEiJtnkWYdkqtkEy7Cw2Rlzzrrym6
 6kIVi3nEPtn/hOnlF/Ii5SJWh+jJrSf+XwXiuIiBupT49Ujoa4KscmhkiHnAccXb
 ICJpsxBIdZLxHLe/c0YO3b8r4Hvms124vlIC19Z0l9VEJ++sphDOWRrL3Zq9tFw8
 FwIKq8Ex9UFfldOnpD5q/PRhM9Xgfsw8UYYZZpXQeW6z7qzv1iVpM6BQlt3dYQaL
 pb21UXIfzaTdZIsUgnetypbqWIFNZxovrhORpjqxo6WV4lSaVx4MPE2/Le/G8xPR
 DT+a6yyzTyM0XbZ0MCVDfuZ+ZRaA1zfKEcsYEu883b7yK4z+TZbT61vnEKqq8+40
 EgOZnNjBENZLRQY0RofQsO5zGwcaanVOtBOmYDXtP/fup8/1SRZ25zmmIVhvChJG
 iQwCDw6IMqnae/FsMb+kBTDCRJXpN028iYGY7UAoiCuvzc0qm0gJXsGdZLqMvjEh
 nEdKKN2ze+03s6I9AcISKdnbUVphhb/xeDKRBkMgcooWLrfWj5E=
 =i37E
 -----END PGP SIGNATURE-----

Merge tag 'livepatching-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching

Pull livepatching updates from Petr Mladek:

 - New API to track system state changes done be livepatch callbacks. It
   helps to maintain compatibility between livepatches.

 - Update Kconfig help text. ORC is another reliable unwinder.

 - Disable generic selftest timeout. Livepatch selftests have their own
   per-operation fine-grained timeouts.

* tag 'livepatching-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching:
  x86/stacktrace: update kconfig help text for reliable unwinders
  livepatch: Selftests of the API for tracking system state changes
  livepatch: Documentation of the new API for tracking system state changes
  livepatch: Allow to distinguish different version of system state changes
  livepatch: Basic API to track system state changes
  livepatch: Keep replaced patches until post_patch callback is called
  selftests/livepatch: Disable the timeout
 2019-11-25 19:43:48 -08:00
Linus Torvalds
436b2a8039 Printk changes for 5.5 
-----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEESH4wyp42V4tXvYsjUqAMR0iAlPIFAl3bpjoACgkQUqAMR0iA
 lPJJDA/+IJT4YCRp2TwV2jvIs0QzvXZrzEsxgCLibLE85mYTJgoQBD3W1bH2eyjp
 T/9U0Zh5PGr/84cHd4qiMxzo+5Olz930weG59NcO4RJBSr671aRYs5tJqwaQAZDR
 wlwaob5S28vUmjPxKulvxv6V3FdI79ZE9xrCOCSTQvz4iCLsGOu+Dn/qtF64pImX
 M/EXzPMBrByiQ8RTM4Ege8JoBqiCZPDG9GR3KPXIXQwEeQgIoeYxwRYakxSmSzz8
 W8NduFCbWavg/yHhghHikMiyOZeQzAt+V9k9WjOBTle3TGJegRhvjgI7508q3tXe
 jQTMGATBOPkIgFaZz7eEn/iBa3jZUIIOzDY93RYBmd26aBvwKLOma/Vkg5oGYl0u
 ZK+CMe+/xXl7brQxQ6JNsQhbSTjT+746LvLJlCvPbbPK9R0HeKNhsdKpGY3ugnmz
 VAnOFIAvWUHO7qx+J+EnOo5iiPpcwXZj4AjrwVrs/x5zVhzwQ+4DSU6rbNn0O1Ak
 ELrBqCQkQzh5kqK93jgMHeWQ9EOUp1Lj6PJhTeVnOx2x8tCOi6iTQFFrfdUPlZ6K
 2DajgrFhti4LvwVsohZlzZuKRm5EuwReLRSOn7PU5qoSm5rcouqMkdlYG/viwyhf
 mTVzEfrfemrIQOqWmzPrWEXlMj2mq8oJm4JkC+jJ/+HsfK4UU8I=
 =QCEy
 -----END PGP SIGNATURE-----

Merge tag 'printk-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk

Pull printk updates from Petr Mladek:

 - Allow to print symbolic error names via new %pe modifier.

 - Use pr_warn() instead of the remaining pr_warning() calls. Fix
   formatting of the related lines.

 - Add VSPRINTF entry to MAINTAINERS.

* tag 'printk-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk: (32 commits)
  checkpatch: don't warn about new vsprintf pointer extension '%pe'
  MAINTAINERS: Add VSPRINTF
  tools lib api: Renaming pr_warning to pr_warn
  ASoC: samsung: Use pr_warn instead of pr_warning
  lib: cpu_rmap: Use pr_warn instead of pr_warning
  trace: Use pr_warn instead of pr_warning
  dma-debug: Use pr_warn instead of pr_warning
  vgacon: Use pr_warn instead of pr_warning
  fs: afs: Use pr_warn instead of pr_warning
  sh/intc: Use pr_warn instead of pr_warning
  scsi: Use pr_warn instead of pr_warning
  platform/x86: intel_oaktrail: Use pr_warn instead of pr_warning
  platform/x86: asus-laptop: Use pr_warn instead of pr_warning
  platform/x86: eeepc-laptop: Use pr_warn instead of pr_warning
  oprofile: Use pr_warn instead of pr_warning
  of: Use pr_warn instead of pr_warning
  macintosh: Use pr_warn instead of pr_warning
  idsn: Use pr_warn instead of pr_warning
  ide: Use pr_warn instead of pr_warning
  crypto: n2: Use pr_warn instead of pr_warning
  ...
 2019-11-25 19:40:40 -08:00
Linus Torvalds
1b96a41b42 Merge branch 'for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 
Pull cgroup updates from Tejun Heo:
 "There are several notable changes here:

   - Single thread migrating itself has been optimized so that it
     doesn't need threadgroup rwsem anymore.

   - Freezer optimization to avoid unnecessary frozen state changes.

   - cgroup ID unification so that cgroup fs ino is the only unique ID
     used for the cgroup and can be used to directly look up live
     cgroups through filehandle interface on 64bit ino archs. On 32bit
     archs, cgroup fs ino is still the only ID in use but it is only
     unique when combined with gen.

   - selftest and other changes"

* 'for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (24 commits)
  writeback: fix -Wformat compilation warnings
  docs: cgroup: mm: Fix spelling of "list"
  cgroup: fix incorrect WARN_ON_ONCE() in cgroup_setup_root()
  cgroup: use cgrp->kn->id as the cgroup ID
  kernfs: use 64bit inos if ino_t is 64bit
  kernfs: implement custom exportfs ops and fid type
  kernfs: combine ino/id lookup functions into kernfs_find_and_get_node_by_id()
  kernfs: convert kernfs_node->id from union kernfs_node_id to u64
  kernfs: kernfs_find_and_get_node_by_ino() should only look up activated nodes
  kernfs: use dumber locking for kernfs_find_and_get_node_by_ino()
  netprio: use css ID instead of cgroup ID
  writeback: use ino_t for inodes in tracepoints
  kernfs: fix ino wrap-around detection
  kselftests: cgroup: Avoid the reuse of fd after it is deallocated
  cgroup: freezer: don't change task and cgroups status unnecessarily
  cgroup: use cgroup->last_bstat instead of cgroup->bstat_pending for consistency
  cgroup: remove cgroup_enable_task_cg_lists() optimization
  cgroup: pids: use atomic64_t for pids->limit
  selftests: cgroup: Run test_core under interfering stress
  selftests: cgroup: Add task migration tests
  ...
 2019-11-25 19:23:46 -08:00
Linus Torvalds
0acefef584 threads-v5.5 
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCXdfjBwAKCRCRxhvAZXjc
 onCBAP47WZ/ie7yjoDWhOI1QB7II3NGSzToakxpgJaWoB+NjTwEA7PGrSYVEbPrf
 pUhiEaEJ29t+cWUxX3+yDO+k7SA6BAY=
 =Ra58
 -----END PGP SIGNATURE-----

Merge tag 'threads-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux

Pull thread management updates from Christian Brauner:

 - A pidfd's fdinfo file currently contains the field "Pid:\t<pid>"
   where <pid> is the pid of the process in the pid namespace of the
   procfs instance the fdinfo file for the pidfd was opened in.

   The fdinfo file has now gained a new "NSpid:\t<ns-pid1>[\t<ns-pid2>[...]]"
   field which lists the pids of the process in all child pid namespaces
   provided the pid namespace of the procfs instance it is looked up
   under has an ancestoral relationship with the pid namespace of the
   process. If it does not 0 will be shown and no further pid namespaces
   will be listed. Tests included. (Christian Kellner)

 - If the process the pidfd references has already exited, print -1 for
   the Pid and NSpid fields in the pidfd's fdinfo file. Tests included.
   (me)

 - Add CLONE_CLEAR_SIGHAND. This lets callers clear all signal handler
   that are not SIG_DFL or SIG_IGN at process creation time. This
   originated as a feature request from glibc to improve performance and
   elimate races in their posix_spawn() implementation. Tests included.
   (me)

 - Add support for choosing a specific pid for a process with clone3().
   This is the feature which was part of the thread update for v5.4 but
   after a discussion at LPC in Lisbon we decided to delay it for one
   more cycle in order to make the interface more generic. This has now
   done. It is now possible to choose a specific pid in a whole pid
   namespaces (sub)hierarchy instead of just one pid namespace. In order
   to choose a specific pid the caller must have CAP_SYS_ADMIN in all
   owning user namespaces of the target pid namespaces. Tests included.
   (Adrian Reber)

 - Test improvements and extensions. (Andrei Vagin, me)

* tag 'threads-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  selftests/clone3: skip if clone3() is ENOSYS
  selftests/clone3: check that all pids are released on error paths
  selftests/clone3: report a correct number of fails
  selftests/clone3: flush stdout and stderr before clone3() and _exit()
  selftests: add tests for clone3() with *set_tid
  fork: extend clone3() to support setting a PID
  selftests: add tests for clone3()
  tests: test CLONE_CLEAR_SIGHAND
  clone3: add CLONE_CLEAR_SIGHAND
  pid: use pid_has_task() in pidfd_open()
  exit: use pid_has_task() in do_wait()
  pid: use pid_has_task() in __change_pid()
  test: verify fdinfo for pidfd of reaped process
  pidfd: check pid has attached task in fdinfo
  pidfd: add tests for NSpid info in fdinfo
  pidfd: add NSpid entries to fdinfo
 2019-11-25 18:36:49 -08:00
Linus Torvalds
752272f16d ARM: 
- Data abort report and injection
 - Steal time support
 - GICv4 performance improvements
 - vgic ITS emulation fixes
 - Simplify FWB handling
 - Enable halt polling counters
 - Make the emulated timer PREEMPT_RT compliant
 
 s390:
 - Small fixes and cleanups
 - selftest improvements
 - yield improvements
 
 PPC:
 - Add capability to tell userspace whether we can single-step the guest.
 - Improve the allocation of XIVE virtual processor IDs
 - Rewrite interrupt synthesis code to deliver interrupts in virtual
   mode when appropriate.
 - Minor cleanups and improvements.
 
 x86:
 - XSAVES support for AMD
 - more accurate report of nested guest TSC to the nested hypervisor
 - retpoline optimizations
 - support for nested 5-level page tables
 - PMU virtualization optimizations, and improved support for nested
   PMU virtualization
 - correct latching of INITs for nested virtualization
 - IOAPIC optimization
 - TSX_CTRL virtualization for more TAA happiness
 - improved allocation and flushing of SEV ASIDs
 - many bugfixes and cleanups
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
 iQEcBAABAgAGBQJd27PMAAoJEL/70l94x66DspsH+gPc6YWtKJFJH58Zj8NrNh6y
 t0FwDFcvUa51+m4jaY4L5Y8+zqu1dZFnPPhFGqNWpxrjCEvE/glQJv3BiUX06Seh
 aYUHNymGoYCTJOHaaGhV+NlgQaDuZOCOkIsOLAPehyFd1KojwB+FRC0xmO6aROPw
 9yQgYrKuK1UUn5HwxBNrMS4+Xv+2iKv/9sTnq1G4W2qX2NZQg84LVPg1zIdkCh3D
 3GOvoCBEk3ivQqjmdE7rP/InPr0XvW0b6TFhchIk8J6jEIQFHsmOUefiTvTxsIHV
 OKAZwvyeYPrYHA/aDZpaBmY2aR0ydfKDUQcviNIJoF1vOktGs0hvl3VbsmG8QCg=
 =OSI1
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Paolo Bonzini:
 "ARM:
   - data abort report and injection
   - steal time support
   - GICv4 performance improvements
   - vgic ITS emulation fixes
   - simplify FWB handling
   - enable halt polling counters
   - make the emulated timer PREEMPT_RT compliant

  s390:
   - small fixes and cleanups
   - selftest improvements
   - yield improvements

  PPC:
   - add capability to tell userspace whether we can single-step the
     guest
   - improve the allocation of XIVE virtual processor IDs
   - rewrite interrupt synthesis code to deliver interrupts in virtual
     mode when appropriate.
   - minor cleanups and improvements.

  x86:
   - XSAVES support for AMD
   - more accurate report of nested guest TSC to the nested hypervisor
   - retpoline optimizations
   - support for nested 5-level page tables
   - PMU virtualization optimizations, and improved support for nested
     PMU virtualization
   - correct latching of INITs for nested virtualization
   - IOAPIC optimization
   - TSX_CTRL virtualization for more TAA happiness
   - improved allocation and flushing of SEV ASIDs
   - many bugfixes and cleanups"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (127 commits)
  kvm: nVMX: Relax guest IA32_FEATURE_CONTROL constraints
  KVM: x86: Grab KVM's srcu lock when setting nested state
  KVM: x86: Open code shared_msr_update() in its only caller
  KVM: Fix jump label out_free_* in kvm_init()
  KVM: x86: Remove a spurious export of a static function
  KVM: x86: create mmu/ subdirectory
  KVM: nVMX: Remove unnecessary TLB flushes on L1<->L2 switches when L1 use apic-access-page
  KVM: x86: remove set but not used variable 'called'
  KVM: nVMX: Do not mark vmcs02->apic_access_page as dirty when unpinning
  KVM: vmx: use MSR_IA32_TSX_CTRL to hard-disable TSX on guest that lack it
  KVM: vmx: implement MSR_IA32_TSX_CTRL disable RTM functionality
  KVM: x86: implement MSR_IA32_TSX_CTRL effect on CPUID
  KVM: x86: do not modify masked bits of shared MSRs
  KVM: x86: fix presentation of TSX feature in ARCH_CAPABILITIES
  KVM: PPC: Book3S HV: XIVE: Fix potential page leak on error path
  KVM: PPC: Book3S HV: XIVE: Free previous EQ page when setting up a new one
  KVM: nVMX: Assume TLB entries of L1 and L2 are tagged differently if L0 use EPT
  KVM: x86: Unexport kvm_vcpu_reload_apic_access_page()
  KVM: nVMX: add CR4_LA57 bit to nested CR4_FIXED1
  KVM: nVMX: Use semi-colon instead of comma for exit-handlers initialization
  ...
 2019-11-25 18:02:36 -08:00
Linus Torvalds
4ba380f616 arm64 updates for 5.5: 
- On ARMv8 CPUs without hardware updates of the access flag, avoid
   failing cow_user_page() on PFN mappings if the pte is old. The patches
   introduce an arch_faults_on_old_pte() macro, defined as false on x86.
   When true, cow_user_page() makes the pte young before attempting
   __copy_from_user_inatomic().
 
 - Covert the synchronous exception handling paths in
   arch/arm64/kernel/entry.S to C.
 
 - FTRACE_WITH_REGS support for arm64.
 
 - ZONE_DMA re-introduced on arm64 to support Raspberry Pi 4
 
 - Several kselftest cases specific to arm64, together with a MAINTAINERS
   update for these files (moved to the ARM64 PORT entry).
 
 - Workaround for a Neoverse-N1 erratum where the CPU may fetch stale
   instructions under certain conditions.
 
 - Workaround for Cortex-A57 and A72 errata where the CPU may
   speculatively execute an AT instruction and associate a VMID with the
   wrong guest page tables (corrupting the TLB).
 
 - Perf updates for arm64: additional PMU topologies on HiSilicon
   platforms, support for CCN-512 interconnect, AXI ID filtering in the
   IMX8 DDR PMU, support for the CCPI2 uncore PMU in ThunderX2.
 
 - GICv3 optimisation to avoid a heavy barrier when accessing the
   ICC_PMR_EL1 register.
 
 - ELF HWCAP documentation updates and clean-up.
 
 - SMC calling convention conduit code clean-up.
 
 - KASLR diagnostics printed during boot
 
 - NVIDIA Carmel CPU added to the KPTI whitelist
 
 - Some arm64 mm clean-ups: use generic free_initrd_mem(), remove stale
   macro, simplify calculation in __create_pgd_mapping(), typos.
 
 - Kconfig clean-ups: CMDLINE_FORCE to depend on CMDLINE, choice for
   endinanness to help with allmodconfig.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEE5RElWfyWxS+3PLO2a9axLQDIXvEFAl3YJswACgkQa9axLQDI
 XvFwYg//aTGhNLew3ADgW2TYal7LyqetRROixPBrzqHLu2A8No1+QxHMaKxpZVyf
 pt25tABuLtPHql3qBzE0ltmfbLVsPj/3hULo404EJb9HLRfUnVGn7gcPkc+p4YAr
 IYkYPXJbk6OlJ84vI+4vXmDEF12bWCqamC9qZ+h99qTpMjFXFO17DSJ7xQ8Xic3A
 HHgCh4uA7gpTVOhLxaS6KIw+AZNYwvQxLXch2+wj6agbGX79uw9BeMhqVXdkPq8B
 RTDJpOdS970WOT4cHWOkmXwsqqGRqgsgyu+bRUJ0U72+0y6MX0qSHIUnVYGmNc5q
 Dtox4rryYLvkv/hbpkvjgVhv98q3J1mXt/CalChWB5dG4YwhJKN2jMiYuoAvB3WS
 6dR7Dfupgai9gq1uoKgBayS2O6iFLSa4g58vt3EqUBqmM7W7viGFPdLbuVio4ycn
 CNF2xZ8MZR6Wrh1JfggO7Hc11EJdSqESYfHO6V/pYB4pdpnqJLDoriYHXU7RsZrc
 HvnrIvQWKMwNbqBvpNbWvK5mpBMMX2pEienA3wOqKNH7MbepVsG+npOZTVTtl9tN
 FL0ePb/mKJu/2+gW8ntiqYn7EzjKprRmknOiT2FjWWo0PxgJ8lumefuhGZZbaOWt
 /aTAeD7qKd/UXLKGHF/9v3q4GEYUdCFOXP94szWVPyLv+D9h8L8=
 =TPL9
 -----END PGP SIGNATURE-----

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Catalin Marinas:
 "Apart from the arm64-specific bits (core arch and perf, new arm64
  selftests), it touches the generic cow_user_page() (reviewed by
  Kirill) together with a macro for x86 to preserve the existing
  behaviour on this architecture.

  Summary:

   - On ARMv8 CPUs without hardware updates of the access flag, avoid
     failing cow_user_page() on PFN mappings if the pte is old. The
     patches introduce an arch_faults_on_old_pte() macro, defined as
     false on x86. When true, cow_user_page() makes the pte young before
     attempting __copy_from_user_inatomic().

   - Covert the synchronous exception handling paths in
     arch/arm64/kernel/entry.S to C.

   - FTRACE_WITH_REGS support for arm64.

   - ZONE_DMA re-introduced on arm64 to support Raspberry Pi 4

   - Several kselftest cases specific to arm64, together with a
     MAINTAINERS update for these files (moved to the ARM64 PORT entry).

   - Workaround for a Neoverse-N1 erratum where the CPU may fetch stale
     instructions under certain conditions.

   - Workaround for Cortex-A57 and A72 errata where the CPU may
     speculatively execute an AT instruction and associate a VMID with
     the wrong guest page tables (corrupting the TLB).

   - Perf updates for arm64: additional PMU topologies on HiSilicon
     platforms, support for CCN-512 interconnect, AXI ID filtering in
     the IMX8 DDR PMU, support for the CCPI2 uncore PMU in ThunderX2.

   - GICv3 optimisation to avoid a heavy barrier when accessing the
     ICC_PMR_EL1 register.

   - ELF HWCAP documentation updates and clean-up.

   - SMC calling convention conduit code clean-up.

   - KASLR diagnostics printed during boot

   - NVIDIA Carmel CPU added to the KPTI whitelist

   - Some arm64 mm clean-ups: use generic free_initrd_mem(), remove
     stale macro, simplify calculation in __create_pgd_mapping(), typos.

   - Kconfig clean-ups: CMDLINE_FORCE to depend on CMDLINE, choice for
     endinanness to help with allmodconfig"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (93 commits)
  arm64: Kconfig: add a choice for endianness
  kselftest: arm64: fix spelling mistake "contiguos" -> "contiguous"
  arm64: Kconfig: make CMDLINE_FORCE depend on CMDLINE
  MAINTAINERS: Add arm64 selftests to the ARM64 PORT entry
  arm64: kaslr: Check command line before looking for a seed
  arm64: kaslr: Announce KASLR status on boot
  kselftest: arm64: fake_sigreturn_misaligned_sp
  kselftest: arm64: fake_sigreturn_bad_size
  kselftest: arm64: fake_sigreturn_duplicated_fpsimd
  kselftest: arm64: fake_sigreturn_missing_fpsimd
  kselftest: arm64: fake_sigreturn_bad_size_for_magic0
  kselftest: arm64: fake_sigreturn_bad_magic
  kselftest: arm64: add helper get_current_context
  kselftest: arm64: extend test_init functionalities
  kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht]
  kselftest: arm64: mangle_pstate_invalid_daif_bits
  kselftest: arm64: mangle_pstate_invalid_compat_toggle and common utils
  kselftest: arm64: extend toplevel skeleton Makefile
  drivers/perf: hisi: update the sccl_id/ccl_id for certain HiSilicon platform
  arm64: mm: reserve CMA and crashkernel in ZONE_DMA32
  ...
 2019-11-25 15:39:19 -08:00
Linus Torvalds
e25645b181 linux-kselftest-5.5-rc1-kunit 
This kselftest update for Linux 5.5-rc1 adds KUnit, a lightweight unit
 testing and mocking framework for the Linux kernel from Brendan Higgins.
 
 KUnit is not an end-to-end testing framework. It is currently supported
 on UML and sub-systems can write unit tests and run them in UML env.
 KUnit documentation is included in this update.
 
 In addition, this Kunit update adds 3 new kunit tests:
 
 - kunit test for proc sysctl from Iurii Zaikin
 - kunit test for the 'list' doubly linked list from David Gow
 - ext4 kunit test for decoding extended timestamps from Iurii Zaikin
 
 In the future KUnit will be linked to Kselftest framework to provide
 a way to trigger KUnit tests from user-space.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEPZKym/RZuOCGeA/kCwJExA0NQxwFAl3YfBQACgkQCwJExA0N
 QxzTjxAAiFhaDMhlpLhn1DpIUNvfKrIgDjJgajQAyMMs6TJK3OrD6J4WbpVD7wGo
 aqF9l6o64sY18JAo3s00j6AcAmVwNH7qzEEuzIQPjJvQ8C4sCWL3esEP4JHgFb2F
 snlSn5KjSsdC1D9N7uQIhgW76xPSyDrTwWQpglvmB9TwmJVBIl9zhu+unp73ufFJ
 N+ieDg8A6W/wDGYSq5JBSkJbuI0gL+daNwUYzxEEZIskndhpovOc82WAldECRm6x
 TfI0u39zTbrEO0DHgmYpyGbTN8TB2mXjH5HMjwg+KbHfKVTKKGvTK7XFs8mWGQpO
 n2meypZuwuIsRPOPcAVs+Gt2dc0jFODJVIV1EzA0WSv6TEdPqyhM/d13tHdCqjm9
 ic5wQ/hQQNEB1Dvg5ereXBaGGaoqP95y61ZpCS9vCXFXH+28E/B63Ebfs2IBIuqS
 Jv2KcoxabyZq3uGdjnn+mD7IM8rkvscRP4Ba31nXRgJIYDHAzqe7APN7y3on4NGx
 1q7lBlA3XZZ8qgo0zpLST20ck/qaL3tk4k8E1f8emh6CuyrCWtazgrWkMIlyEX0O
 8nre3uEAF9xUzB4+gZK4YmelN9Bld3Uv7Ippt1zTCiQ0FkEABQIMUrTZygy7Wfg6
 6qi4dk8frWW4Kt63gOXsMxr9FWTqDk+Ys4GPAVDVm1d0dzERn8k=
 =0zEe
 -----END PGP SIGNATURE-----

Merge tag 'linux-kselftest-5.5-rc1-kunit' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest KUnit support gtom Shuah Khan:
 "This adds KUnit, a lightweight unit testing and mocking framework for
  the Linux kernel from Brendan Higgins.

  KUnit is not an end-to-end testing framework. It is currently
  supported on UML and sub-systems can write unit tests and run them in
  UML env. KUnit documentation is included in this update.

  In addition, this Kunit update adds 3 new kunit tests:

   - proc sysctl test from Iurii Zaikin

   - the 'list' doubly linked list test from David Gow

   - ext4 tests for decoding extended timestamps from Iurii Zaikin

  In the future KUnit will be linked to Kselftest framework to provide a
  way to trigger KUnit tests from user-space"

* tag 'linux-kselftest-5.5-rc1-kunit' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (23 commits)
  lib/list-test: add a test for the 'list' doubly linked list
  ext4: add kunit test for decoding extended timestamps
  Documentation: kunit: Fix verification command
  kunit: Fix '--build_dir' option
  kunit: fix failure to build without printk
  MAINTAINERS: add proc sysctl KUnit test to PROC SYSCTL section
  kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec()
  MAINTAINERS: add entry for KUnit the unit testing framework
  Documentation: kunit: add documentation for KUnit
  kunit: defconfig: add defconfigs for building KUnit tests
  kunit: tool: add Python wrappers for running KUnit tests
  kunit: test: add tests for KUnit managed resources
  kunit: test: add the concept of assertions
  kunit: test: add tests for kunit test abort
  kunit: test: add support for test abort
  objtool: add kunit_try_catch_throw to the noreturn list
  kunit: test: add initial tests
  lib: enable building KUnit in lib/
  kunit: test: add the concept of expectations
  kunit: test: add assertion printing library
  ...
 2019-11-25 15:01:30 -08:00
Linus Torvalds
db7d275415 linux-kselftest-5.5-rc1-fixes 
This kselftest fixes update for Linux 5.5-rc1 consists of several
 fixes to tests and framework. Masami Hiramatsu fixed several tests
 to build and run correctly on arm and other 32bit architectures.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEPZKym/RZuOCGeA/kCwJExA0NQxwFAl3YLAsACgkQCwJExA0N
 QxySoxAAwTJgNDhyxWGLFzlReuILBitWuTbEg1KzlOMjKWHnDBHhO9GYqxScKt5Y
 fgjjwukvQyai0PGMKd4U+AXtxeSB+Wr9kID7AXuTeDyBOK1iu9Nr++vSkAByJla4
 qSVYf+Ja3Zu8kWs3S9rC1zs8dvMutA4FrjW7ig77quFxfSncwqIsTufo53gpBo5e
 tJ/VakouWiMV7oyDDPzqrs7Uz01CMmEsJXAkyHzb/nc+6NjJUpewRhZGkYXi89Le
 2nBvEUUpdLMphds+KxO51+e+5pnU0ZD4PtjGcQ4/SABWWrCvNKJ9Tn398AdcndYX
 NGQe9eohcSB47YKA+sNagi+B4UBfgz6GtYEsdAy8oNxxEGTg8apKygvIlfjmp8in
 EMcFF/r6Wwxufx4F9uRFLn48t4d/SAYqCne/RaSwb+IkAe+wyFKeTNP7bwqAwakE
 Uvfpjoya0n5IXBKV9v6MrJJZKwKw6J9mu51wahmx2MQveW8p4nqnzy3xZ8AWOqb/
 BezRWOgs85Yank8ovXfbAtxcdqKfw3BpDDO379OM7syvTMWNbLcfhpZ9wbyxB108
 lcPsjrvu2SNzMs21vsyoDkTE/CPl0byr2v4SWOfUq1YTbsxVIveP4qcy9B12C3aR
 m7vRGLG2HwMrlVZ1mvXY2Tz0Jjhx7S+0eyYYzEBMHGT4zRqxjwU=
 =KGOl
 -----END PGP SIGNATURE-----

Merge tag 'linux-kselftest-5.5-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest fixes from Shuah Khan:
 "This consists of several fixes to tests and framework.

  Masami Hiramatsu fixed several tests to build and run correctly on arm
  and other 32bit architectures"

* tag 'linux-kselftest-5.5-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests: sync: Fix cast warnings on arm
  selftests: net: Fix printf format warnings on arm
  selftests: net: Use size_t and ssize_t for counting file size
  selftests: vm: Build/Run 64bit tests only on 64bit arch
  selftests: proc: Make va_max 1MB
  kselftest: Fix NULL INSTALL_PATH for TARGETS runlist
  selftests: Move kselftest_module.sh into kselftest/
  selftests: gen_kselftest_tar.sh: Do not clobber kselftest/
  selftests: breakpoints: Fix a typo of function name
  selftests: Fix O= and KBUILD_OUTPUT handling for relative paths
 2019-11-25 14:58:09 -08:00
Andrii Nakryiko
b615e5a1e0 libbpf: Fix usage of u32 in userspace code 
u32 is not defined for libbpf when compiled outside of kernel sources (e.g.,
in Github projection). Use __u32 instead.

Fixes: b8c54ea455 ("libbpf: Add support to attach to fentry/fexit tracing progs")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191125212948.1163343-1-andriin@fb.com
 2019-11-25 13:52:01 -08:00
Linus Torvalds
ff6814b078 for-5.5/block-20191121 
-----BEGIN PGP SIGNATURE-----
 
 iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAl3WxrEQHGF4Ym9lQGtl
 cm5lbC5kawAKCRD301j7KXHgpuH5D/9qQKfIIuQDUNO4Xx+dIHimTDCrfiEOeO9e
 CRaMuSj+yMxLDMwfX8RnDmR17H3ZVoiIY1CT24U9ZkA5iDjeAH4xmzkH30US7LR7
 /64YVZTxB0OrWppRK8RiIhaJJZDQ6+HPUQsn6PRaLVuFHi2unMoTQnj/ZQKz03QA
 Pl8Xx7qBtH1JwYCzQ21f/uryAcNg9eWabRLN2f1uiOXLmvRxOfh6Z/iaezlaZlmL
 qeJdcdLjjvOgOPwEOfNjfS6pd+XBz3gdEhn0l+11nHITxWZmVBwsWTKyUQlCmKnl
 yuCWDVyx5d6zCnlrLYG0l2Fn2lr9SwAkdkq3YAKV03hA/6s6P9q9bm31VvOf828x
 7gmr4YVz68y7H9bM0QAHCvDpjll0aIEUw6XFzSOCDtZ9B6/pppYQWzMU71J05eyF
 8DOKv2M2EVNLUjf6u0RDyolnWGU0kIjt5ryWE3OsGcezAVa2wYstgUJTKbrn1YgT
 j+4KTpaI+sg8GKDFauvxcSa6gwoRp6jweFNW+7vC090/shXmrGmVLOnQZKRuHho/
 O4W8y/1/deM8CCIAETpiNxA8RV5U/EZygrFGDFc7yzTtVDGHY356M/B4Bmm2qkVu
 K3WgeZp8Fc0lH0QF6Pp9ZlBkZEpGNCAPVsPkXIsxQXbctftkn3KY//uIubfpFEB1
 PpHSicvkww==
 =HYYq
 -----END PGP SIGNATURE-----

Merge tag 'for-5.5/block-20191121' of git://git.kernel.dk/linux-block

Pull core block updates from Jens Axboe:
 "Due to more granular branches, this one is small and will be followed
  with other core branches that add specific features. I meant to just
  have a core and drivers branch, but external dependencies we ended up
  adding a few more that are also core.

  The changes are:

   - Fixes and improvements for the zoned device support (Ajay, Damien)

   - sed-opal table writing and datastore UID (Revanth)

   - blk-cgroup (and bfq) blk-cgroup stat fixes (Tejun)

   - Improvements to the block stats tracking (Pavel)

   - Fix for overruning sysfs buffer for large number of CPUs (Ming)

   - Optimization for small IO (Ming, Christoph)

   - Fix typo in RWH lifetime hint (Eugene)

   - Dead code removal and documentation (Bart)

   - Reduction in memory usage for queue and tag set (Bart)

   - Kerneldoc header documentation (André)

   - Device/partition revalidation fixes (Jan)

   - Stats tracking for flush requests (Konstantin)

   - Various other little fixes here and there (et al)"

* tag 'for-5.5/block-20191121' of git://git.kernel.dk/linux-block: (48 commits)
  Revert "block: split bio if the only bvec's length is > SZ_4K"
  block: add iostat counters for flush requests
  block,bfq: Skip tracing hooks if possible
  block: sed-opal: Introduce SUM_SET_LIST parameter and append it using 'add_token_u64'
  blk-cgroup: cgroup_rstat_updated() shouldn't be called on cgroup1
  block: Don't disable interrupts in trigger_softirq()
  sbitmap: Delete sbitmap_any_bit_clear()
  blk-mq: Delete blk_mq_has_free_tags() and blk_mq_can_queue()
  block: split bio if the only bvec's length is > SZ_4K
  block: still try to split bio if the bvec crosses pages
  blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT
  blk-cgroup: reimplement basic IO stats using cgroup rstat
  blk-cgroup: remove now unused blkg_print_stat_{bytes|ios}_recursive()
  blk-throtl: stop using blkg->stat_bytes and ->stat_ios
  bfq-iosched: stop using blkg->stat_bytes and ->stat_ios
  bfq-iosched: relocate bfqg_*rwstat*() helpers
  block: add zone open, close and finish ioctl support
  block: add zone open, close and finish operations
  block: Simplify REQ_OP_ZONE_RESET_ALL handling
  block: Remove REQ_OP_ZONE_RESET plugging
  ...
 2019-11-25 10:59:41 -08:00
Petr Mladek
0e672adc87 Merge branch 'for-5.5/system-state' into for-linus 2019-11-25 13:53:49 +01:00
Ingo Molnar
ceb9e77324 Merge branch 'x86/core' into perf/core, to resolve conflicts and to pick up completed topic tree 
Conflicts:
	tools/perf/check-headers.sh

Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2019-11-25 09:09:27 +01:00
Ingo Molnar
c494cd6469 Merge branch 'perf/urgent' into perf/core, to pick up fixes 
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2019-11-25 09:08:29 +01:00
Martin KaFai Lau
f9a7cf6eb1 bpf: Introduce BPF_TRACE_x helper for the tracing tests 
For BPF_PROG_TYPE_TRACING, the bpf_prog's ctx is an array of u64.
This patch borrows the idea from BPF_CALL_x in filter.h to
convert a u64 to the arg type of the traced function.

The new BPF_TRACE_x has an arg to specify the return type of a bpf_prog.
It will be used in the future TCP-ops bpf_prog that may return "void".

The new macros are defined in the new header file "bpf_trace_helpers.h".
It is under selftests/bpf/ for now.  It could be moved to libbpf later
after seeing more upcoming non-tracing use cases.

The tests are changed to use these new macros also.  Hence,
the k[s]u8/16/32/64 are no longer needed and they are removed
from the bpf_helpers.h.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191123202504.1502696-1-kafai@fb.com
 2019-11-24 17:12:11 -08:00
Daniel Borkmann
79d49ba048 bpf, testing: Add various tail call test cases 
Add several BPF kselftest cases for tail calls which test the various
patch directions, and that multiple locations are patched in same and
different programs.

  # ./test_progs -n 45
   #45/1 tailcall_1:OK
   #45/2 tailcall_2:OK
   #45/3 tailcall_3:OK
   #45/4 tailcall_4:OK
   #45/5 tailcall_5:OK
   #45 tailcalls:OK
  Summary: 1/5 PASSED, 0 SKIPPED, 0 FAILED

I've also verified the JITed dump after each of the rewrite cases that
it matches expectations.

Also regular test_verifier suite passes fine which contains further tail
call tests:

  # ./test_verifier
  [...]
  Summary: 1563 PASSED, 0 SKIPPED, 0 FAILED

Checked under JIT, interpreter and JIT + hardening.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/3d6cbecbeb171117dccfe153306e479798fb608d.1574452833.git.daniel@iogearbox.net
 2019-11-24 17:04:12 -08:00
Alexei Starovoitov
c4781e37c6 selftests/bpf: Add BPF trampoline performance test 
Add a test that benchmarks different ways of attaching BPF program to a kernel function.
Here are the results for 2.4Ghz x86 cpu on a kernel without mitigations:
$ ./test_progs -n 49 -v|grep events
task_rename base	2743K events per sec
task_rename kprobe	2419K events per sec
task_rename kretprobe	1876K events per sec
task_rename raw_tp	2578K events per sec
task_rename fentry	2710K events per sec
task_rename fexit	2685K events per sec

On a kernel with retpoline:
$ ./test_progs -n 49 -v|grep events
task_rename base	2401K events per sec
task_rename kprobe	1930K events per sec
task_rename kretprobe	1485K events per sec
task_rename raw_tp	2053K events per sec
task_rename fentry	2351K events per sec
task_rename fexit	2185K events per sec

All 5 approaches:
- kprobe/kretprobe in __set_task_comm()
- raw tracepoint in trace_task_rename()
- fentry/fexit in __set_task_comm()
are roughly equivalent.

__set_task_comm() by itself is quite fast, so any extra instructions add up.
Until BPF trampoline was introduced the fastest mechanism was raw tracepoint.
kprobe via ftrace was second best. kretprobe is slow due to trap. New
fentry/fexit methods via BPF trampoline are clearly the fastest and the
difference is more pronounced with retpoline on, since BPF trampoline doesn't
use indirect jumps.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20191122011515.255371-1-ast@kernel.org
 2019-11-24 16:58:46 -08:00
Yonghong Song
260cb5df9d selftests/bpf: Add verifier tests for better jmp32 register bounds 
Three test cases are added.
Test 1: jmp32 'reg op imm'.
Test 2: jmp32 'reg op reg' where dst 'reg' has unknown constant
        and src 'reg' has known constant
Test 3: jmp32 'reg op reg' where dst 'reg' has known constant
        and src 'reg' has unknown constant

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191121170651.449096-1-yhs@fb.com
 2019-11-24 16:58:46 -08:00
Andrii Nakryiko
6147a140c9 selftests/bpf: Ensure core_reloc_kernel is reading test_progs's data only 
test_core_reloc_kernel.c selftest is the only CO-RE test that reads and
returns for validation calling thread's information (pid, tgid, comm). Thus it
has to make sure that only test_prog's invocations are honored.

Fixes: df36e62141 ("selftests/bpf: add CO-RE relocs testing setup")
Reported-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20191121175900.3486133-1-andriin@fb.com
 2019-11-24 16:58:46 -08:00
Andrii Nakryiko
1aace10f41 libbpf: Fix bpf_object name determination for bpf_object__open_file() 
If bpf_object__open_file() gets path like "some/dir/obj.o", it should derive
BPF object's name as "obj" (unless overriden through opts->object_name).
Instead, due to using `path` as a fallback value for opts->obj_name, path is
used as is for object name, so for above example BPF object's name will be
verbatim "some/dir/obj", which leads to all sorts of troubles, especially when
internal maps are concern (they are using up to 8 characters of object name).
Fix that by ensuring object_name stays NULL, unless overriden.

Fixes: 291ee02b5e ("libbpf: Refactor bpf_object__open APIs to use common opts")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191122003527.551556-1-andriin@fb.com
 2019-11-24 16:58:46 -08:00
Andrii Nakryiko
393cdfbee8 libbpf: Support initialized global variables 
Initialized global variables are no different in ELF from static variables,
and don't require any extra support from libbpf. But they are matching
semantics of global data (backed by BPF maps) more closely, preventing
LLVM/Clang from aggressively inlining constant values and not requiring
volatile incantations to prevent those. This patch enables global variables.
It still disables uninitialized variables, which will be put into special COM
(common) ELF section, because BPF doesn't allow uninitialized data to be
accessed.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191121070743.1309473-5-andriin@fb.com
 2019-11-24 16:58:45 -08:00
Andrii Nakryiko
8983b731ce libbpf: Fix various errors and warning reported by checkpatch.pl 
Fix a bunch of warnings and errors reported by checkpatch.pl, to make it
easier to spot new problems.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191121070743.1309473-4-andriin@fb.com
 2019-11-24 16:58:45 -08:00
Andrii Nakryiko
1f8e2bcb2c libbpf: Refactor relocation handling 
Relocation handling code is convoluted and unnecessarily deeply nested. Split
out per-relocation logic into separate function. Also refactor the logic to be
more a sequence of per-relocation type checks and processing steps, making it
simpler to follow control flow. This makes it easier to further extends it to
new kinds of relocations (e.g., support for extern variables).

This patch also makes relocation's section verification more robust.
Previously relocations against not yet supported externs were silently ignored
because of obj->efile.text_shndx was zero, when all BPF programs had custom
section names and there was no .text section. Also, invalid LDIMM64 relocations
against non-map sections were passed through, if they were pointing to a .text
section (or 0, which is invalid section). All these bugs are fixed within this
refactoring and checks are made more appropriate for each type of relocation.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191121070743.1309473-3-andriin@fb.com
 2019-11-24 16:58:45 -08:00
Andrii Nakryiko
ffc88174cd selftests/bpf: Ensure no DWARF relocations for BPF object files 
Add -mattr=dwarfris attribute to llc to avoid having relocations against DWARF
data. These relocations make it impossible to inspect DWARF contents: all
strings are invalid.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191121070743.1309473-2-andriin@fb.com
 2019-11-24 16:58:45 -08:00
Andrii Nakryiko
a8fdaad5cf selftests/bpf: Integrate verbose verifier log into test_progs 
Add exra level of verboseness, activated by -vvv argument. When -vv is
specified, verbose libbpf and verifier log (level 1) is output, even for
successful tests. With -vvv, verifier log goes to level 2.

This is extremely useful to debug verifier failures, as well as just see the
state and flow of verification. Before this, you'd have to go and modify
load_program()'s source code inside libbpf to specify extra log_level flags,
which is suboptimal to say the least.

Currently -vv and -vvv triggering verifier output is integrated into
test_stub's bpf_prog_load as well as bpf_verif_scale.c tests.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191120003548.4159797-1-andriin@fb.com
 2019-11-24 16:58:45 -08:00
Jakub Kicinski
5940c5bf65 selftests, bpftool: Skip the build test if not in tree 
If selftests are copied over to another machine/location
for execution the build test of bpftool will obviously
not work, since the sources are not copied.
Skip it if we can't find bpftool's Makefile.

Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20191119105010.19189-3-quentin.monnet@netronome.com
 2019-11-24 16:58:45 -08:00
Quentin Monnet
31f8b8295b selftests, bpftool: Set EXIT trap after usage function 
The trap on EXIT is used to clean up any temporary directory left by the
build attempts. It is not needed when the user simply calls the script
with its --help option, and may not be needed either if we add checks
(e.g. on the availability of bpftool files) before the build attempts.

Let's move this trap and related variables lower down in the code, so
that we don't accidentally change the value returned from the script
on early exits at pre-checks.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Link: https://lore.kernel.org/bpf/20191119105010.19189-2-quentin.monnet@netronome.com
 2019-11-24 16:58:45 -08:00
Quentin Monnet
a89b2cbf71 tools, bpf: Fix build for 'make -s tools/bpf O=<dir>' 
Building selftests with 'make TARGETS=bpf kselftest' was fixed in commit
55d554f5d1 ("tools: bpf: Use !building_out_of_srctree to determine
srctree"). However, by updating $(srctree) in tools/bpf/Makefile for
in-tree builds only, we leave out the case where we pass an output
directory to build BPF tools, but $(srctree) is not set. This
typically happens for:

    $ make -s tools/bpf O=/tmp/foo
    Makefile:40: /tools/build/Makefile.feature: No such file or directory

Fix it by updating $(srctree) in the Makefile not only for out-of-tree
builds, but also if $(srctree) is empty.

Detected with test_bpftool_build.sh.

Fixes: 55d554f5d1 ("tools: bpf: Use !building_out_of_srctree to determine srctree")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Link: https://lore.kernel.org/bpf/20191119105626.21453-1-quentin.monnet@netronome.com
 2019-11-24 16:58:45 -08:00
Quentin Monnet
a0f17cc666 tools, bpftool: Fix warning on ignored return value for 'read' 
When building bpftool, a warning was introduced by commit a943646036
("bpftool: Allow to read btf as raw data"), because the return value
from a call to 'read()' is ignored. Let's address it.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20191119111706.22440-1-quentin.monnet@netronome.com
 2019-11-24 16:58:44 -08:00
Paul Walmsley
69049d523f Merge branch 'next/seccomp' into for-next 2019-11-22 18:58:26 -08:00
Jakub Kicinski
a9f852e92e Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Minor conflict in drivers/s390/net/qeth_l2_main.c, kept the lock
from commit c8183f5489 ("s390/qeth: fix potential deadlock on
workqueue flush"), removed the code which was removed by commit
9897d583b0 ("s390/qeth: consolidate some duplicated HW cmd code").

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
 2019-11-22 16:27:24 -08:00
Ian Rogers
4584f084aa perf parse: Fix potential memory leak when handling tracepoint errors 
An error may be in place when tracepoint_error is called, use
parse_events__handle_error to avoid a memory leak and to capture the
first and last error. Error detected by LLVM's libFuzzer using the
following event:

$ perf stat -e 'msr/event/,f:e'
event syntax error: 'msr/event/,f:e'
                     \___ can't access trace events

Error:  No permissions to read /sys/kernel/debug/tracing/events/f/e
Hint:   Try 'sudo mount -o remount,mode=755 /sys/kernel/debug/tracing/'

Initial error:
event syntax error: 'msr/event/,f:e'
                                \___ no value assigned for term
Run 'perf list' for a list of valid events

 Usage: perf stat [<options>] [<command>]

    -e, --event <event>   event selector. use 'perf list' to list available events

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: clang-built-linux@googlegroups.com
Link: http://lore.kernel.org/lkml/20191120180925.21787-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2019-11-22 10:48:14 -03:00
Colin Ian King
358f98ee8a perf probe: Fix spelling mistake "addrees" -> "address" 
There is a spelling mistake in a pr_warning message. Fix it.

Signed-off-by: Colin King <colin.king@canonical.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: kernel-janitors@vger.kernel.org
Link: http://lore.kernel.org/lkml/20191121092623.374896-1-colin.king@canonical.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2019-11-22 10:48:14 -03:00
Hewenliang
10992af6bf libtraceevent: Fix memory leakage in copy_filter_type 
It is necessary to free the memory that we have allocated when error occurs.

Fixes: ef3072cd1d ("tools lib traceevent: Get rid of die in add_filter_type()")
Signed-off-by: Hewenliang <hewenliang4@huawei.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Tzvetomir Stoyanov <tstoyanov@vmware.com>
Link: http://lore.kernel.org/lkml/20191119014415.57210-1-hewenliang4@huawei.com
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2019-11-22 10:48:14 -03:00
Sudip Mukherjee
68401a1799 libtraceevent: Fix header installation 
When we passed some location in DESTDIR, install_headers called
do_install with DESTDIR as part of the second argument.

But do_install is again using '$(DESTDIR_SQ)$2', so as a result the
headers were installed in a location $DESTDIR/$DESTDIR.

In my testing I passed DESTDIR=/home/sudip/test and the headers were
installed in: /home/sudip/test/home/sudip/test/usr/include/traceevent.

Lets remove DESTDIR from the second argument of do_install so that the
headers are installed in the correct location.

Signed-off-by: Sudipm Mukherjee <sudipm.mukherjee@gmail.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Sudipm Mukherjee <sudipm.mukherjee@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20191114133719.309-1-sudipm.mukherjee@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2019-11-22 10:48:14 -03:00