linux-toradex.git/drivers/hv, branch v5.3-rc3

proc/sysctl: add shared variables for range check

2019-07-19T00:08:07+00:00

In the sysctl code the proc_dointvec_minmax() function is often used to
validate the user supplied value between an allowed range.  This
function uses the extra1 and extra2 members from struct ctl_table as
minimum and maximum allowed value.

On sysctl handler declaration, in every source file there are some
readonly variables containing just an integer which address is assigned
to the extra1 and extra2 members, so the sysctl range is enforced.

The special values 0, 1 and INT_MAX are very often used as range
boundary, leading duplication of variables like zero=0, one=1,
int_max=INT_MAX in different source files:

    $ git grep -E '\.extra[12].*&(zero|one|int_max)' |wc -l
    248

Add a const int array containing the most commonly used values, some
macros to refer more easily to the correct array member, and use them
instead of creating a local one for every object file.

This is the bloat-o-meter output comparing the old and new binary
compiled with the default Fedora config:

    # scripts/bloat-o-meter -d vmlinux.o.old vmlinux.o
    add/remove: 2/2 grow/shrink: 0/2 up/down: 24/-188 (-164)
    Data                                         old     new   delta
    sysctl_vals                                    -      12     +12
    __kstrtab_sysctl_vals                          -      12     +12
    max                                           14      10      -4
    int_max                                       16       -     -16
    one                                           68       -     -68
    zero                                         128      28    -100
    Total: Before=20583249, After=20583085, chg -0.00%

[mcroce@redhat.com: tipc: remove two unused variables]
  Link: http://lkml.kernel.org/r/20190530091952.4108-1-mcroce@redhat.com
[akpm@linux-foundation.org: fix net/ipv6/sysctl_net_ipv6.c]
[arnd@arndb.de: proc/sysctl: make firmware loader table conditional]
  Link: http://lkml.kernel.org/r/20190617130014.1713870-1-arnd@arndb.de
[akpm@linux-foundation.org: fix fs/eventpoll.c]
Link: http://lkml.kernel.org/r/20190430180111.10688-1-mcroce@redhat.com
Signed-off-by: Matteo Croce 
Signed-off-by: Arnd Bergmann 
Acked-by: Kees Cook 
Reviewed-by: Aaron Tomlin 
Cc: Matthew Wilcox 
Cc: Stephen Rothwell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

2019-07-12T22:28:38+00:00

Pull hyper-v updates from Sasha Levin:

 - Add a module description to the Hyper-V vmbus module.

 - Rework some vmbus code to separate architecture specifics out to
   arch/x86/. This is part of the work of adding arm64 support to
   Hyper-V.

* tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  Drivers: hv: vmbus: Break out ISA independent parts of mshyperv.h
  drivers: hv: Add a module description line to the hv_vmbus driver

Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-07-09T00:49:45+00:00

Pull x86 platform updayes from Ingo Molnar:
 "Most of the commits add ACRN hypervisor guest support, plus two
  cleanups"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/jailhouse: Mark jailhouse_x2apic_available() as __init
  x86/platform/geode: Drop  includes
  x86/acrn: Use HYPERVISOR_CALLBACK_VECTOR for ACRN guest upcall vector
  x86: Add support for Linux guests on an ACRN hypervisor
  x86/Kconfig: Add new X86_HV_CALLBACK_VECTOR config symbol

clocksource/drivers: Continue making Hyper-V clocksource ISA agnostic

2019-07-03T09:00:59+00:00

Continue consolidating Hyper-V clock and timer code into an ISA
independent Hyper-V clocksource driver.

Move the existing clocksource code under drivers/hv and arch/x86 to the new
clocksource driver while separating out the ISA dependencies. Update
Hyper-V initialization to call initialization and cleanup routines since
the Hyper-V synthetic clock is not independently enumerated in ACPI.

Update Hyper-V clocksource users in KVM and VDSO to get definitions from
the new include file.

No behavior is changed and no new functionality is added.

Suggested-by: Marc Zyngier 
Signed-off-by: Michael Kelley 
Signed-off-by: Thomas Gleixner 
Reviewed-by: Vitaly Kuznetsov 
Cc: "bp@alien8.de" 
Cc: "will.deacon@arm.com" 
Cc: "catalin.marinas@arm.com" 
Cc: "mark.rutland@arm.com" 
Cc: "linux-arm-kernel@lists.infradead.org" 
Cc: "gregkh@linuxfoundation.org" 
Cc: "linux-hyperv@vger.kernel.org" 
Cc: "olaf@aepfle.de" 
Cc: "apw@canonical.com" 
Cc: "jasowang@redhat.com" 
Cc: "marcelo.cerri@canonical.com" 
Cc: Sunil Muthuswamy 
Cc: KY Srinivasan 
Cc: "sashal@kernel.org" 
Cc: "vincenzo.frascino@arm.com" 
Cc: "linux-arch@vger.kernel.org" 
Cc: "linux-mips@vger.kernel.org" 
Cc: "linux-kselftest@vger.kernel.org" 
Cc: "arnd@arndb.de" 
Cc: "linux@armlinux.org.uk" 
Cc: "ralf@linux-mips.org" 
Cc: "paul.burton@mips.com" 
Cc: "daniel.lezcano@linaro.org" 
Cc: "salyzyn@android.com" 
Cc: "pcc@google.com" 
Cc: "shuah@kernel.org" 
Cc: "0x7f454c46@gmail.com" <0x7f454c46@gmail.com>
Cc: "linux@rasmusvillemoes.dk" 
Cc: "huw@codeweavers.com" 
Cc: "sfr@canb.auug.org.au" 
Cc: "pbonzini@redhat.com" 
Cc: "rkrcmar@redhat.com" 
Cc: "kvm@vger.kernel.org" 
Link: https://lkml.kernel.org/r/1561955054-1838-3-git-send-email-mikelley@microsoft.com

clocksource/drivers: Make Hyper-V clocksource ISA agnostic

2019-07-03T09:00:59+00:00

Hyper-V clock/timer code and data structures are currently mixed
in with other code in the ISA independent drivers/hv directory as
well as the ISA dependent Hyper-V code under arch/x86.

Consolidate this code and data structures into a Hyper-V clocksource driver
to better follow the Linux model. In doing so, separate out the ISA
dependent portions so the new clocksource driver works for x86 and for the
in-process Hyper-V on ARM64 code.

To start, move the existing clockevents code to create the new clocksource
driver. Update the VMbus driver to call initialization and cleanup routines
since the Hyper-V synthetic timers are not independently enumerated in
ACPI.

No behavior is changed and no new functionality is added.

Suggested-by: Marc Zyngier 
Signed-off-by: Michael Kelley 
Signed-off-by: Thomas Gleixner 
Reviewed-by: Vitaly Kuznetsov 
Cc: "bp@alien8.de" 
Cc: "will.deacon@arm.com" 
Cc: "catalin.marinas@arm.com" 
Cc: "mark.rutland@arm.com" 
Cc: "linux-arm-kernel@lists.infradead.org" 
Cc: "gregkh@linuxfoundation.org" 
Cc: "linux-hyperv@vger.kernel.org" 
Cc: "olaf@aepfle.de" 
Cc: "apw@canonical.com" 
Cc: "jasowang@redhat.com" 
Cc: "marcelo.cerri@canonical.com" 
Cc: Sunil Muthuswamy 
Cc: KY Srinivasan 
Cc: "sashal@kernel.org" 
Cc: "vincenzo.frascino@arm.com" 
Cc: "linux-arch@vger.kernel.org" 
Cc: "linux-mips@vger.kernel.org" 
Cc: "linux-kselftest@vger.kernel.org" 
Cc: "arnd@arndb.de" 
Cc: "linux@armlinux.org.uk" 
Cc: "ralf@linux-mips.org" 
Cc: "paul.burton@mips.com" 
Cc: "daniel.lezcano@linaro.org" 
Cc: "salyzyn@android.com" 
Cc: "pcc@google.com" 
Cc: "shuah@kernel.org" 
Cc: "0x7f454c46@gmail.com" <0x7f454c46@gmail.com>
Cc: "linux@rasmusvillemoes.dk" 
Cc: "huw@codeweavers.com" 
Cc: "sfr@canb.auug.org.au" 
Cc: "pbonzini@redhat.com" 
Cc: "rkrcmar@redhat.com" 
Cc: "kvm@vger.kernel.org" 
Link: https://lkml.kernel.org/r/1561955054-1838-2-git-send-email-mikelley@microsoft.com

drivers: hv: Add a module description line to the hv_vmbus driver

2019-06-24T00:20:02+00:00

This patch only adds a MODULE_DESCRIPTION statement to the driver.
This change is only cosmetic, so there should be no runtime impact.

Signed-off-by: Joseph Salisbury 
Reviewed-by: Michael Kelley 
Signed-off-by: Sasha Levin

x86/Kconfig: Add new X86_HV_CALLBACK_VECTOR config symbol

2019-06-11T19:21:11+00:00

Add a special Kconfig symbol X86_HV_CALLBACK_VECTOR so that the guests
using the hypervisor interrupt callback counter can select and thus
enable that counter. Select it when xen or hyperv support is enabled. No
functional changes.

Signed-off-by: Zhao Yakui 
Signed-off-by: Borislav Petkov 
Reviewed-by: Borislav Petkov 
Reviewed-by: Thomas Gleixner 
Cc: Boris Ostrovsky 
Cc: Frederic Weisbecker 
Cc: Haiyang Zhang 
Cc: "H. Peter Anvin" 
Cc: Ingo Molnar 
Cc: Juergen Gross 
Cc: "K. Y. Srinivasan" 
Cc: linux-hyperv@vger.kernel.org
Cc: Nicolai Stange 
Cc: Paolo Bonzini 
Cc: Peter Zijlstra 
Cc: Sasha Levin 
Cc: Stefano Stabellini 
Cc: Stephen Hemminger 
Cc: Thomas Gleixner 
Cc: x86-ml 
Cc: xen-devel@lists.xenproject.org
Link: https://lkml.kernel.org/r/1559108037-18813-2-git-send-email-yakui.zhao@intel.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 320

2019-06-05T15:37:05+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 as published by the free software foundation this program
  is distributed in the hope it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details you should have received a copy of the gnu general
  public license along with this program if not write to the free
  software foundation inc 59 temple place suite 330 boston ma 02111
  1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 33 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Allison Randal 
Reviewed-by: Kate Stewart 
Reviewed-by: Alexios Zavras 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000435.254582722@linutronix.de
Signed-off-by: Greg Kroah-Hartman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 280

2019-06-05T15:36:36+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose good title or non infringement see
  the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 9 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Alexios Zavras 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.459653302@linutronix.de
Signed-off-by: Greg Kroah-Hartman

Drivers: hv: vmbus: Remove the undesired put_cpu_ptr() in hv_synic_cleanup()

2019-04-13T13:36:35+00:00

With CONFIG_DEBUG_PREEMPT=y, the put_cpu_ptr() triggers an underflow
warning in preempt_count_sub().

Fixes: 37cdd991fac8 ("vmbus: put related per-cpu variable together")
Cc: stable@vger.kernel.org
Cc: Stephen Hemminger 
Signed-off-by: Dexuan Cui 
Reviewed-by: Michael Kelley 
Signed-off-by: Sasha Levin (Microsoft)