sfrench/cifs-2.6.git
4 years agoclocksource/drivers: Make Hyper-V clocksource ISA agnostic
Michael Kelley [Mon, 1 Jul 2019 04:25:56 +0000 (04:25 +0000)]
clocksource/drivers: Make Hyper-V clocksource ISA agnostic

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 <marc.zyngier@arm.com>
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: "bp@alien8.de" <bp@alien8.de>
Cc: "will.deacon@arm.com" <will.deacon@arm.com>
Cc: "catalin.marinas@arm.com" <catalin.marinas@arm.com>
Cc: "mark.rutland@arm.com" <mark.rutland@arm.com>
Cc: "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>
Cc: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>
Cc: "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>
Cc: "olaf@aepfle.de" <olaf@aepfle.de>
Cc: "apw@canonical.com" <apw@canonical.com>
Cc: "jasowang@redhat.com" <jasowang@redhat.com>
Cc: "marcelo.cerri@canonical.com" <marcelo.cerri@canonical.com>
Cc: Sunil Muthuswamy <sunilmut@microsoft.com>
Cc: KY Srinivasan <kys@microsoft.com>
Cc: "sashal@kernel.org" <sashal@kernel.org>
Cc: "vincenzo.frascino@arm.com" <vincenzo.frascino@arm.com>
Cc: "linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>
Cc: "linux-mips@vger.kernel.org" <linux-mips@vger.kernel.org>
Cc: "linux-kselftest@vger.kernel.org" <linux-kselftest@vger.kernel.org>
Cc: "arnd@arndb.de" <arnd@arndb.de>
Cc: "linux@armlinux.org.uk" <linux@armlinux.org.uk>
Cc: "ralf@linux-mips.org" <ralf@linux-mips.org>
Cc: "paul.burton@mips.com" <paul.burton@mips.com>
Cc: "daniel.lezcano@linaro.org" <daniel.lezcano@linaro.org>
Cc: "salyzyn@android.com" <salyzyn@android.com>
Cc: "pcc@google.com" <pcc@google.com>
Cc: "shuah@kernel.org" <shuah@kernel.org>
Cc: "0x7f454c46@gmail.com" <0x7f454c46@gmail.com>
Cc: "linux@rasmusvillemoes.dk" <linux@rasmusvillemoes.dk>
Cc: "huw@codeweavers.com" <huw@codeweavers.com>
Cc: "sfr@canb.auug.org.au" <sfr@canb.auug.org.au>
Cc: "pbonzini@redhat.com" <pbonzini@redhat.com>
Cc: "rkrcmar@redhat.com" <rkrcmar@redhat.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
Link: https://lkml.kernel.org/r/1561955054-1838-2-git-send-email-mikelley@microsoft.com
4 years agoMerge branch 'timers/vdso' into timers/core
Thomas Gleixner [Wed, 3 Jul 2019 08:50:21 +0000 (10:50 +0200)]
Merge branch 'timers/vdso' into timers/core

so the hyper-v clocksource update can be applied.

4 years agoMAINTAINERS: Fix Andy's surname and the directory entries of VDSO
Thomas Gleixner [Thu, 27 Jun 2019 23:12:26 +0000 (01:12 +0200)]
MAINTAINERS: Fix Andy's surname and the directory entries of VDSO

Fixes: e70980312a94 ("MAINTAINERS: Add entry for the generic VDSO library")
Reported-by: Joe Perches/ <joe@perches.com>
Reported-by: Andy Lutomirks^H^Hski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
4 years agohrtimer: Use a bullet for the returns bullet list
Mauro Carvalho Chehab [Mon, 24 Jun 2019 10:33:26 +0000 (07:33 -0300)]
hrtimer: Use a bullet for the returns bullet list

That gets rid of this warning:

   ./kernel/time/hrtimer.c:1119: WARNING: Block quote ends without a blank line; unexpected unindent.

and displays nicely both at the source code and at the produced
documentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linux Doc Mailing List <linux-doc@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Link: https://lkml.kernel.org/r/74ddad7dac331b4e5ce4a90e15c8a49e3a16d2ac.1561372382.git.mchehab+samsung@kernel.org
4 years agoMerge tag 'timers-v5.4' of https://git.linaro.org/people/daniel.lezcano/linux into...
Thomas Gleixner [Wed, 26 Jun 2019 14:45:49 +0000 (16:45 +0200)]
Merge tag 'timers-v5.4' of https://git.linaro.org/people/daniel.lezcano/linux into timers/core

Pull clocksource/events updates from Daniel Lezcano:

 - Rewrite of the davinci timer resulting to an immutable branch to be
   shared with davinci platform specific tree (Bartosz Golaszewski)

 - Cleanup and improvements of the tegra timer (Dmitry Osipenko)

 - Add new nxp system counter timer (Bai Ping)

 - Increase priority for exynos_mct to take over the initialization
   of the IP the arch ARM timer depends on (Marek Szyprowski)

 - Change macro use _BITUL() by BIT() on arc timer (Masahiro Yamada)

 - Implement the delay timer on ixp4xx (Linus Walleij)

 - Add the SPDX license identifier on the meson timer (Neil Armstrong)

4 years agoMerge branch 'timers/drivers/davinci' into timers/drivers/next
Daniel Lezcano [Wed, 26 Jun 2019 14:24:33 +0000 (16:24 +0200)]
Merge branch 'timers/drivers/davinci' into timers/drivers/next

4 years agoarm64: vdso: Fix compilation with clang older than 8
Vincenzo Frascino [Wed, 26 Jun 2019 11:36:32 +0000 (12:36 +0100)]
arm64: vdso: Fix compilation with clang older than 8

clang versions older than 8 do not support -mcmodel=tiny.

Add a check to the vDSO Makefile for arm64 to remove the flag when
these versions of the compiler are detected.

Reported-by: Qian Cai <cai@lca.pw>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Qian Cai <cai@lca.pw>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: catalin.marinas@arm.com
Cc: will.deacon@arm.com
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
Cc: linux@rasmusvillemoes.dk
Cc: huw@codeweavers.com
Cc: sthotton@marvell.com
Cc: andre.przywara@arm.com
Cc: luto@kernel.org
Link: https://lkml.kernel.org/r/20190626113632.9295-1-vincenzo.frascino@arm.com
4 years agoarm64: compat: Fix __arch_get_hw_counter() implementation
Vincenzo Frascino [Tue, 25 Jun 2019 16:18:04 +0000 (17:18 +0100)]
arm64: compat: Fix __arch_get_hw_counter() implementation

Provide the following fixes for the __arch_get_hw_counter()
implementation on arm64:
- Fallback on syscall when an unstable counter is detected.
- Introduce isb()s before and after the counter read to avoid
speculation of the counter value and of the seq lock
respectively.
The second isb() is a temporary solution that will be revisited
in 5.3-rc1.

These fixes restore the semantics that __arch_counter_get_cntvct()
had on arm64.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: catalin.marinas@arm.com
Cc: will.deacon@arm.com
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
Cc: linux@rasmusvillemoes.dk
Cc: huw@codeweavers.com
Cc: sthotton@marvell.com
Cc: andre.przywara@arm.com
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Link: https://lkml.kernel.org/r/20190625161804.38713-3-vincenzo.frascino@arm.com
4 years agoarm64: Fix __arch_get_hw_counter() implementation
Vincenzo Frascino [Tue, 25 Jun 2019 16:18:03 +0000 (17:18 +0100)]
arm64: Fix __arch_get_hw_counter() implementation

Provide the following fixes for the __arch_get_hw_counter()
implementation on arm64:
 - Fallback on syscall when an unstable counter is detected.
 - Introduce isb()s before and after the counter read to avoid
   speculation of the counter value and of the seq lock
   respectively.
   The second isb() is a temporary solution that will be revisited
   in 5.3-rc1.

These fixes restore the semantics that __arch_counter_get_cntvct()
had on arm64.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: catalin.marinas@arm.com
Cc: will.deacon@arm.com
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
Cc: linux@rasmusvillemoes.dk
Cc: huw@codeweavers.com
Cc: sthotton@marvell.com
Cc: andre.przywara@arm.com
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Link: https://lkml.kernel.org/r/20190625161804.38713-2-vincenzo.frascino@arm.com
4 years agolib/vdso: Make delta calculation work correctly
Thomas Gleixner [Wed, 26 Jun 2019 10:02:00 +0000 (12:02 +0200)]
lib/vdso: Make delta calculation work correctly

The x86 vdso implementation on which the generic vdso library is based on
has subtle (unfortunately undocumented) twists:

 1) The code assumes that the clocksource mask is U64_MAX which means that
    no bits are masked. Which is true for any valid x86 VDSO clocksource.
    Stupidly it still did the mask operation for no reason and at the wrong
    place right after reading the clocksource.

 2) It contains a sanity check to catch the case where slightly
    unsynchronized TSC values can be observed which would cause the delta
    calculation to make a huge jump. It therefore checks whether the
    current TSC value is larger than the value on which the current
    conversion is based on. If it's not larger the base value is used to
    prevent time jumps.

#1 Is not only stupid for the X86 case because it does the masking for no
reason it is also completely wrong for clocksources with a smaller mask
which can legitimately wrap around during a conversion period. The core
timekeeping code does it correct by applying the mask after the delta
calculation:

(now - base) & mask

#2 is equally broken for clocksources which have smaller masks and can wrap
around during a conversion period because there the now > base check is
just wrong and causes stale time stamps and time going backwards issues.

Unbreak it by:

  1) Removing the mask operation from the clocksource read which makes the
     fallback detection work for all clocksources

  2) Replacing the conditional delta calculation with a overrideable inline
     function.

#2 could reuse clocksource_delta() from the timekeeping code but that
results in a significant performance hit for the x86 VSDO. The timekeeping
core code must have the non optimized version as it has to operate
correctly with clocksources which have smaller masks as well to handle the
case where TSC is discarded as timekeeper clocksource and replaced by HPET
or pmtimer. For the VDSO there is no replacement clocksource. If TSC is
unusable the syscall is enforced which does the right thing.

To accommodate to the needs of various architectures provide an
override-able inline function which defaults to the regular delta
calculation with masking:

(now - base) & mask

Override it for x86 with the non-masking and checking version.

This unbreaks the ARM64 syscall fallback operation, allows to use
clocksources with arbitrary width and preserves the performance
optimization for x86.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: LAK <linux-arm-kernel@lists.infradead.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: catalin.marinas@arm.com
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux@armlinux.org.uk
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: paul.burton@mips.com
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: salyzyn@android.com
Cc: pcc@google.com
Cc: shuah@kernel.org
Cc: 0x7f454c46@gmail.com
Cc: linux@rasmusvillemoes.dk
Cc: huw@codeweavers.com
Cc: sthotton@marvell.com
Cc: andre.przywara@arm.com
Cc: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1906261159230.32342@nanos.tec.linutronix.de
4 years agoMAINTAINERS: Add entry for the generic VDSO library
Thomas Gleixner [Mon, 24 Jun 2019 00:34:24 +0000 (02:34 +0200)]
MAINTAINERS: Add entry for the generic VDSO library

Assign the following folks in alphabetic order:

 - Andy for being the VDSO wizard of x86 and in general. He's also the
   performance monitor of choice and the code in the generic library is
   heavily influenced by his previous x86 VDSO work.

 - Thomas for being the dude who has to deal with any form of time(r)
   nonsense anyway

 - Vincenzo for being the poor sod who went through all the different
   architecture implementations in order to unify them. A lot of knowledge
   gained from VDSO implementation details to the intricacies of taming the
   build system.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: LAK <linux-arm-kernel@lists.infradead.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Cc: Shijith Thotton <sthotton@marvell.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Cc: Dmitry Safonov <dima@arista.com>
Cc: Andrei Vagin <avagin@openvz.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Michael Kelley <mikelley@microsoft.com>
Cc: Sasha Levin <sashal@kernel.org>
Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1906240142000.32342@nanos.tec.linutronix.de
4 years agoarm64: compat: No need for pre-ARMv7 barriers on an ARMv8 system
Catalin Marinas [Mon, 24 Jun 2019 14:00:19 +0000 (15:00 +0100)]
arm64: compat: No need for pre-ARMv7 barriers on an ARMv8 system

Remove the deprecated (pre-ARMv7) compat barriers as they would not be used
on an ARMv8 system.

Fixes: a7f71a2c8903 ("arm64: compat: Add vDSO")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Cc: Shijith Thotton <sthotton@marvell.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Link: https://lkml.kernel.org/r/20190624140018.GD29120@arrakis.emea.arm.com
4 years agoarm64: vdso: Remove unnecessary asm-offsets.c definitions
Catalin Marinas [Mon, 24 Jun 2019 13:58:12 +0000 (14:58 +0100)]
arm64: vdso: Remove unnecessary asm-offsets.c definitions

Since the VDSO code has moved to C from assembly, there is no need to
define and maintain the corresponding asm offsets.

Fixes: 28b1a824a4f4 ("arm64: vdso: Substitute gettimeofday() with C implementation")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Cc: Shijith Thotton <sthotton@marvell.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Link: https://lkml.kernel.org/r/20190624135812.GC29120@arrakis.emea.arm.com
4 years agovdso: Remove superfluous #ifdef __KERNEL__ in vdso/datapage.h
Catalin Marinas [Mon, 24 Jun 2019 13:56:24 +0000 (14:56 +0100)]
vdso: Remove superfluous #ifdef __KERNEL__ in vdso/datapage.h

With the move to UAPI headers, such #ifdefs are no longer necessary.

Fixes: 361f8aee9b09 ("vdso: Define standardized vdso_datapage")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Cc: Shijith Thotton <sthotton@marvell.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Link: https://lkml.kernel.org/r/20190624135624.GB29120@arrakis.emea.arm.com
4 years agoclocksource/drivers/davinci: Add support for clocksource
Bartosz Golaszewski [Mon, 24 Jun 2019 09:50:56 +0000 (11:50 +0200)]
clocksource/drivers/davinci: Add support for clocksource

Extend the davinci-timer driver to also register a clock source.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/davinci: Add support for clockevents
Bartosz Golaszewski [Mon, 24 Jun 2019 09:50:55 +0000 (11:50 +0200)]
clocksource/drivers/davinci: Add support for clockevents

Currently the clocksource and clockevent support for davinci platforms
lives in mach-davinci. It hard-codes many things, uses global variables,
implements functionalities unused by any platform and has code fragments
scattered across many (often unrelated) files.

Implement a new, modern and simplified timer driver and put it into
drivers/clocksource. We still need to support legacy board files so
export a config structure and a function that allows machine code to
register the timer.

The timer we're using is 64-bit but can be programmed in dual 32-bit
mode (both chained and unchained).

On all davinci SoCs except for da830 we're using both halves. Lower half
for clockevents and upper half for clocksource. On da830 we're using the
lower half for both with the help of a compare register.

This patch contains the core code and support for clockevent. The
clocksource code will be included in a subsequent patch.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Set up maximum-ticks limit properly
Dmitry Osipenko [Tue, 18 Jun 2019 14:03:58 +0000 (17:03 +0300)]
clocksource/drivers/tegra: Set up maximum-ticks limit properly

Tegra's timer has 29 bits for the counter and for the "load" register
which sets counter to a load-value. The counter's value is lower than
the actual value by 1 because it starts to decrement after one tick,
hence the maximum number of ticks that hardware can handle equals to
29 bits + 1.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Cycles can't be 0
Dmitry Osipenko [Tue, 18 Jun 2019 14:03:57 +0000 (17:03 +0300)]
clocksource/drivers/tegra: Cycles can't be 0

Tegra's timer uses n+1 scheme for the counter, i.e. timer will fire after
one tick if 0 is loaded. The minimum and maximum numbers of oneshot ticks
are defined by clockevents_config_and_register(min, max) invocation and
the min value is set to 1 tick. Hence "cycles" value can't ever be 0,
unless it's a bug in clocksource core.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Restore base address before cleanup
Dmitry Osipenko [Tue, 18 Jun 2019 14:03:56 +0000 (17:03 +0300)]
clocksource/drivers/tegra: Restore base address before cleanup

We're adjusting the timer's base for each per-CPU timer to point to the
actual start of the timer since device-tree defines a compound registers
range that includes all of the timers. In this case the original base
need to be restore before calling iounmap to unmap the proper address.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Add verbose definition for 1MHz constant
Dmitry Osipenko [Tue, 18 Jun 2019 14:03:55 +0000 (17:03 +0300)]
clocksource/drivers/tegra: Add verbose definition for 1MHz constant

Convert all 1MHz literals to a verbose constant for better readability.

Suggested-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Drop unneeded typecasting in one place
Dmitry Osipenko [Tue, 18 Jun 2019 14:03:54 +0000 (17:03 +0300)]
clocksource/drivers/tegra: Drop unneeded typecasting in one place

There is no need to cast void because kernel allows to do that without
a warning message from a compiler.

Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Set and use timer's period
Dmitry Osipenko [Tue, 18 Jun 2019 14:03:53 +0000 (17:03 +0300)]
clocksource/drivers/tegra: Set and use timer's period

The of_clk structure has a period field that is set up initially by
timer_of_clk_init(), that period value need to be adjusted for a case of
TIMER1-9 that are running at a fixed rate that doesn't match the clock's
rate. Note that the period value is currently used only by some of the
clocksource drivers internally and hence this is just a minor cleanup
change that doesn't fix anything.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Remove duplicated use of per_cpu_ptr
Dmitry Osipenko [Tue, 18 Jun 2019 14:03:52 +0000 (17:03 +0300)]
clocksource/drivers/tegra: Remove duplicated use of per_cpu_ptr

It was left unnoticed by accident, which means that the code could be
cleaned up a tad more.

Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Restore timer rate on Tegra210
Dmitry Osipenko [Tue, 18 Jun 2019 14:03:51 +0000 (17:03 +0300)]
clocksource/drivers/tegra: Restore timer rate on Tegra210

The clocksource rate is initialized only for the first per-CPU clocksource
and then that rate shall be replicated for the rest of clocksource's
because they are initialized manually in the code.

Fixes: 3be2a85a0b61 ("clocksource/drivers/tegra: Support per-CPU timers on all Tegra's")
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/arm_arch_timer: Extract elf_hwcap use to arch-helper
Andrew Murray [Thu, 13 Jun 2019 12:51:02 +0000 (13:51 +0100)]
clocksource/drivers/arm_arch_timer: Extract elf_hwcap use to arch-helper

Different mechanisms are used to test and set elf_hwcaps between ARM
and ARM64, this results in the use of ifdeferry in this file when
setting/testing for the EVTSTRM hwcap.

Let's improve readability by extracting this to an arch helper.

Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/sysctr: Add nxp system counter timer driver support
Bai Ping [Wed, 5 Jun 2019 06:40:52 +0000 (06:40 +0000)]
clocksource/drivers/sysctr: Add nxp system counter timer driver support

The system counter (sys_ctr) is a programmable system counter
which provides a shared time base to the Cortex A15, A7, A53 etc cores.
It is intended for use in applications where the counter is always
powered on and supports multiple, unrelated clocks. The sys_ctr hardware
supports:
 - 56-bit counter width (roll-over time greater than 40 years)
 - compare frame(64-bit compare value) contains programmable interrupt
   generation when compare value <= counter value.

[dlezcano] Fixed over 80 chars length warning

Signed-off-by: Bai Ping <ping.bai@nxp.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Rename timer-tegra20.c to timer-tegra.c
Dmitry Osipenko [Mon, 3 Jun 2019 18:59:48 +0000 (21:59 +0300)]
clocksource/drivers/tegra: Rename timer-tegra20.c to timer-tegra.c

Rename driver's source file to better reflect that it's not specific to
older SoC generations.

Suggested-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Lower clocksource rating for some Tegra's
Dmitry Osipenko [Mon, 3 Jun 2019 18:59:47 +0000 (21:59 +0300)]
clocksource/drivers/tegra: Lower clocksource rating for some Tegra's

Arch-timer is more preferable for a range of Tegra SoC generations as
it has higher precision and is not affect by any kind of problems.

Pointed-out-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Support COMPILE_TEST universally
Dmitry Osipenko [Mon, 3 Jun 2019 18:59:46 +0000 (21:59 +0300)]
clocksource/drivers/tegra: Support COMPILE_TEST universally

Remove build dependency on ARM for compile-testing to allow non-arch
specific build-bots (like Intel's test robot) to compile the driver and
report about problems.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Minor code clean up
Dmitry Osipenko [Mon, 3 Jun 2019 18:59:44 +0000 (21:59 +0300)]
clocksource/drivers/tegra: Minor code clean up

Correct typo and use proper upper casing for acronyms in the comments,
use common style for error messages, prepend error messages with
"tegra-timer:", add error message for cpuhp_setup_state() failure and
clean up whitespaces in the code to fix checkpatch warnings.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Release all IRQ's on request_irq() error
Dmitry Osipenko [Mon, 3 Jun 2019 18:59:43 +0000 (21:59 +0300)]
clocksource/drivers/tegra: Release all IRQ's on request_irq() error

Release all requested IRQ's on the request error to properly clean up
allocated resources.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Replace readl/writel with relaxed versions
Dmitry Osipenko [Mon, 3 Jun 2019 18:59:42 +0000 (21:59 +0300)]
clocksource/drivers/tegra: Replace readl/writel with relaxed versions

The readl/writel functions are inserting memory barrier to ensure that
outstanding memory writes are completed, this results in L2 cache syncing
being done on Tegra20 and Tegra30 which isn't a very cheap operation.
Replace all readl/writel occurrences in the code with the relaxed versions
since there is no need for the memory-access syncing.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Reset hardware state on init
Dmitry Osipenko [Mon, 3 Jun 2019 18:59:41 +0000 (21:59 +0300)]
clocksource/drivers/tegra: Reset hardware state on init

Reset timer's hardware state to ensure that initially it is in a
predictable state.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Unify timer code
Dmitry Osipenko [Mon, 3 Jun 2019 18:59:40 +0000 (21:59 +0300)]
clocksource/drivers/tegra: Unify timer code

Tegra132 is 64bit platform and it has the tegra20-timer hardware unit.
Right now the corresponding timer code isn't compiled for ARM64, remove
ifdef'iness from the code and compile tegra20-timer for both 32 and 64 bit
platforms. Also note that like the older generations, Tegra210 has the
microseconds counter, hence the timer_us clocksource is now made available
for Tegra210 as well.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/tegra: Support per-CPU timers on all Tegra's
Dmitry Osipenko [Mon, 3 Jun 2019 18:59:39 +0000 (21:59 +0300)]
clocksource/drivers/tegra: Support per-CPU timers on all Tegra's

Assign TMR1-4 per-CPU core on 32bit Tegra's in a way it is done for
Tegra210. In a result each core can handle its own timer events, less
code is unique to ARM64 and Tegra's clock events driver now has higher
rating on all Tegra's, replacing the ARM's TWD timer which isn't very
accurate due to the clock rate jitter caused by CPU frequency scaling.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/exynos_mct: Increase priority over ARM arch timer
Marek Szyprowski [Thu, 30 May 2019 10:50:43 +0000 (12:50 +0200)]
clocksource/drivers/exynos_mct: Increase priority over ARM arch timer

Exynos SoCs based on CA7/CA15 have 2 timer interfaces: custom Exynos MCT
(Multi Core Timer) and standard ARM Architected Timers.

There are use cases, where both timer interfaces are used simultanously.
One of such examples is using Exynos MCT for the main system timer and
ARM Architected Timers for the KVM and virtualized guests (KVM requires
arch timers).

Exynos Multi-Core Timer driver (exynos_mct) must be however started
before ARM Architected Timers (arch_timer), because they both share some
common hardware blocks (global system counter) and turning on MCT is
needed to get ARM Architected Timer working properly.

To ensure selecting Exynos MCT as the main system timer, increase MCT
timer rating. To ensure proper starting order of both timers during
suspend/resume cycle, increase MCT hotplug priority over ARM Archictected
Timers.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/arc_timer: Use BIT() instead of _BITUL()
Masahiro Yamada [Fri, 24 May 2019 05:40:10 +0000 (14:40 +0900)]
clocksource/drivers/arc_timer: Use BIT() instead of _BITUL()

This is in-kernel C code, so there is no reason to use _BITUL().
Replace it with equivalent BIT().

I added #include <linux/bits.h> explicitly although it has been included
by other headers eventually.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/ixp4xx: Implement delay timer
Linus Walleij [Thu, 23 May 2019 18:16:02 +0000 (20:16 +0200)]
clocksource/drivers/ixp4xx: Implement delay timer

This adds delay timer functionality to the IXP4xx
timer driver.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agoclocksource/drivers/timer-meson6: Update with SPDX Licence identifier
Neil Armstrong [Mon, 20 May 2019 14:00:07 +0000 (16:00 +0200)]
clocksource/drivers/timer-meson6: Update with SPDX Licence identifier

Comply with the licensing rules defined in the documentation.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
4 years agotimekeeping: Boot should be boottime for coarse ns accessor
Jason A. Donenfeld [Mon, 24 Jun 2019 09:15:39 +0000 (11:15 +0200)]
timekeeping: Boot should be boottime for coarse ns accessor

Somewhere in all the patchsets before, this cleanup got lost.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/20190624091539.13512-1-Jason@zx2c4.com
4 years agox86/vdso: Give the [ph]vclock_page declarations real types
Andy Lutomirski [Sat, 22 Jun 2019 22:08:18 +0000 (15:08 -0700)]
x86/vdso: Give the [ph]vclock_page declarations real types

Clean up the vDSO code a bit by giving pvclock_page and hvclock_page
their actual types instead of u8[PAGE_SIZE].  This shouldn't
materially affect the generated code.

Heavily based on a patch from Linus.

[ tglx: Adapted to the unified VDSO code ]

Co-developed-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/6920c5188f8658001af1fc56fd35b815706d300c.1561241273.git.luto@kernel.org
4 years agotimer_list: Guard procfs specific code
Nathan Huckleberry [Fri, 14 Jun 2019 18:16:04 +0000 (11:16 -0700)]
timer_list: Guard procfs specific code

With CONFIG_PROC_FS=n the following warning is emitted:

kernel/time/timer_list.c:361:36: warning: unused variable
'timer_list_sops' [-Wunused-const-variable]
   static const struct seq_operations timer_list_sops = {

Add #ifdef guard around procfs specific code.

Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: john.stultz@linaro.org
Cc: sboyd@kernel.org
Cc: clang-built-linux@googlegroups.com
Link: https://github.com/ClangBuiltLinux/linux/issues/534
Link: https://lkml.kernel.org/r/20190614181604.112297-1-nhuck@google.com
4 years agox86/vdso: Add clock_gettime64() entry point
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:51 +0000 (10:52 +0100)]
x86/vdso: Add clock_gettime64() entry point

Linux 5.1 gained the new clock_gettime64() syscall to address the Y2038
problem on 32bit systems. The x86 VDSO is missing support for this variant
of clock_gettime().

Update the x86 specific vDSO library accordingly so it exposes the new time
getter.

[ tglx: Massaged changelog ]

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Cc: Shijith Thotton <sthotton@marvell.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-25-vincenzo.frascino@arm.com
4 years agox86/vdso: Add clock_getres() entry point
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:50 +0000 (10:52 +0100)]
x86/vdso: Add clock_getres() entry point

The generic vDSO library provides an implementation of clock_getres()
that can be leveraged by each architecture.

Add the clock_getres() VDSO entry point on x86.

[ tglx: Massaged changelog and cleaned up the function signature formatting ]

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Cc: Shijith Thotton <sthotton@marvell.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-24-vincenzo.frascino@arm.com
4 years agox86/vdso: Switch to generic vDSO implementation
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:49 +0000 (10:52 +0100)]
x86/vdso: Switch to generic vDSO implementation

The x86 vDSO library requires some adaptations to take advantage of the
newly introduced generic vDSO library.

Introduce the following changes:
 - Modification of vdso.c to be compliant with the common vdso datapage
 - Use of lib/vdso for gettimeofday

[ tglx: Massaged changelog and cleaned up the function signature formatting ]

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Cc: Shijith Thotton <sthotton@marvell.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-23-vincenzo.frascino@arm.com
4 years agoarm64: vdso: Enable vDSO compat support
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:42 +0000 (10:52 +0100)]
arm64: vdso: Enable vDSO compat support

Add vDSO compat support to the arm64 build system.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-16-vincenzo.frascino@arm.com
4 years agoarm64: compat: Get sigreturn trampolines from vDSO
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:41 +0000 (10:52 +0100)]
arm64: compat: Get sigreturn trampolines from vDSO

When the compat vDSO is enabled, the sigreturn trampolines are not
anymore available through [sigpage] but through [vdso].

Add the relevant code the enable the feature.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-15-vincenzo.frascino@arm.com
4 years agoarm64: elf: VDSO code page discovery
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:40 +0000 (10:52 +0100)]
arm64: elf: VDSO code page discovery

Like in normal vDSOs, when compat vDSOs are enabled the auxiliary
vector symbol AT_SYSINFO_EHDR needs to point to the address of the
vDSO code, to allow the dynamic linker to find it.

Add the necessary code to the elf arm64 module to make this possible.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-14-vincenzo.frascino@arm.com
4 years agoarm64: compat: VDSO setup for compat layer
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:39 +0000 (10:52 +0100)]
arm64: compat: VDSO setup for compat layer

If CONFIG_GENERIC_COMPAT_VDSO is enabled, compat vDSO is installed in a
compat (32 bit) process instead of sigpage.

Add the necessary code to setup the vDSO required pages.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-13-vincenzo.frascino@arm.com
4 years agoarm64: vdso: Refactor vDSO code
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:38 +0000 (10:52 +0100)]
arm64: vdso: Refactor vDSO code

Most of the code for initializing the vDSOs in arm64 and compat will be
shared, hence refactoring of the current code is required to avoid
duplication and to simplify maintainability.

No functional change.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-12-vincenzo.frascino@arm.com
4 years agoarm64: compat: Add vDSO
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:37 +0000 (10:52 +0100)]
arm64: compat: Add vDSO

Provide the arm64 compat (AArch32) vDSO in kernel/vdso32 in a similar
way to what happens in kernel/vdso.

The compat vDSO leverages on an adaptation of the arm architecture code
with few changes:

 - Use of lib/vdso for gettimeofday
 - Implement a syscall based fallback
 - Introduce clock_getres() for the compat library
 - Implement trampolines
 - Implement elf note

To build the compat vDSO a 32 bit compiler is required and needs to be
specified via CONFIG_CROSS_COMPILE_COMPAT_VDSO.

The code is not yet enabled as other prerequisites are missing.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-11-vincenzo.frascino@arm.com
4 years agoarm64: compat: Generate asm offsets for signals
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:35 +0000 (10:52 +0100)]
arm64: compat: Generate asm offsets for signals

Update asm-offsets for arm64 to generate the correct offsets for
compat signals.

They will be useful for the implementation of the compat sigreturn
trampolines in vDSO context.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-9-vincenzo.frascino@arm.com
4 years agoarm64: compat: Expose signal related structures
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:34 +0000 (10:52 +0100)]
arm64: compat: Expose signal related structures

The compat signal data structures are required as part of the compat
vDSO implementation in order to provide the unwinding information for
the sigreturn trampolines.

Expose these data structures as part of signal32.h.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-8-vincenzo.frascino@arm.com
4 years agoarm64: compat: Add missing syscall numbers
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:33 +0000 (10:52 +0100)]
arm64: compat: Add missing syscall numbers

vDSO requires gettimeofday() and clock_gettime() syscalls to implement the
fallback mechanism.

Add the missing syscall numbers to unistd.h for arm64.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-7-vincenzo.frascino@arm.com
4 years agoarm64: vdso: Build vDSO with -ffixed-x18
Peter Collingbourne [Fri, 21 Jun 2019 09:52:32 +0000 (10:52 +0100)]
arm64: vdso: Build vDSO with -ffixed-x18

The vDSO needs to be built with x18 reserved in order to accommodate
userspace platform ABIs built on top of Linux that use the register
to carry inter-procedural state, as provided for by the AAPCS.
An example of such a platform ABI is the one that will be used by an
upcoming version of Android.

Although this change is currently a no-op due to the fact that the vDSO
is currently implemented in pure assembly on arm64, it is necessary
in order to prepare for using the generic C implementation of the vDSO.

[ tglx: Massaged changelog ]

Signed-off-by: Peter Collingbourne <pcc@google.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Cc: Mark Salyzyn <salyzyn@google.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-6-vincenzo.frascino@arm.com
4 years agoarm64: vdso: Substitute gettimeofday() with C implementation
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:31 +0000 (10:52 +0100)]
arm64: vdso: Substitute gettimeofday() with C implementation

To take advantage of the commonly defined vdso interface for gettimeofday()
the architectural code requires an adaptation.

Re-implement the gettimeofday VDSO in C in order to use lib/vdso.

With the new implementation arm64 gains support for CLOCK_BOOTTIME
and CLOCK_TAI.

[ tglx: Reformatted the function line breaks ]

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-5-vincenzo.frascino@arm.com
4 years agotimekeeping: Provide a generic update_vsyscall() implementation
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:30 +0000 (10:52 +0100)]
timekeeping: Provide a generic update_vsyscall() implementation

The new generic VDSO library allows to unify the update_vsyscall[_tz]()
implementations.

Provide a generic implementation based on the x86 code and the bindings
which need to be implemented in architecture specific code.

[ tglx: Moved it into kernel/time where it belongs. Removed the pointless
   line breaks in the stub functions. Massaged changelog ]

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-4-vincenzo.frascino@arm.com
4 years agolib/vdso: Add compat support
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:36 +0000 (10:52 +0100)]
lib/vdso: Add compat support

Some 64 bit architectures have support for 32 bit applications that
require a separate version of the vDSOs.

Add support to the generic code for compat fallback functions.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-10-vincenzo.frascino@arm.com
4 years agolib/vdso: Provide generic VDSO implementation
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:29 +0000 (10:52 +0100)]
lib/vdso: Provide generic VDSO implementation

In the last few years the kernel gained quite some architecture specific
vdso implementations which contain very similar code.

Introduce a generic VDSO implementation of gettimeofday() which will be
shareable between architectures once they are converted over.

The implementation is based on the current x86 VDSO code.

[ tglx: Massaged changelog and made the kernel doc tabular ]

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-3-vincenzo.frascino@arm.com
4 years agovdso: Define standardized vdso_datapage
Vincenzo Frascino [Fri, 21 Jun 2019 09:52:28 +0000 (10:52 +0100)]
vdso: Define standardized vdso_datapage

Define a common formet for the vdso datapage as a preparation for sharing
the VDSO implementation as a generic library.

The datastructures are based on the current x86 layout.

[ tglx: Massaged changelog ]

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-2-vincenzo.frascino@arm.com
4 years agohrtimer: Split out hrtimer defines into separate header
Vincenzo Frascino [Sat, 22 Jun 2019 13:02:07 +0000 (15:02 +0200)]
hrtimer: Split out hrtimer defines into separate header

To avoid include dependency hell split out the hrtimer defines which are
required in the upcoming VDSO library into a separate header file.

[ tglx: Split out from the VDSO library patch and included ktime.h as
        the new header depends on it. ]

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Link: https://lkml.kernel.org/r/20190621095252.32307-3-vincenzo.frascino@arm.com
4 years agoMerge tag 'pci-v5.2-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Linus Torvalds [Sat, 22 Jun 2019 16:42:29 +0000 (09:42 -0700)]
Merge tag 'pci-v5.2-fixes-1' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fix from Bjorn Helgaas:
 "If an IOMMU is present, ignore the P2PDMA whitelist we added for v5.2
  because we don't yet know how to support P2PDMA in that case (Logan
  Gunthorpe)"

* tag 'pci-v5.2-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI/P2PDMA: Ignore root complex whitelist when an IOMMU is present

4 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 22 Jun 2019 16:39:03 +0000 (09:39 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Three driver fixes (and one version number update): a suspend hang in
  ufs, a qla hard lock on module removal and a qedi panic during
  discovery"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: qla2xxx: Fix hardlockup in abort command during driver remove
  scsi: ufs: Avoid runtime suspend possibly being blocked forever
  scsi: qedi: update driver version to 8.37.0.20
  scsi: qedi: Check targetname while finding boot target information

4 years agoMerge tag 'powerpc-5.2-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Sat, 22 Jun 2019 16:09:42 +0000 (09:09 -0700)]
Merge tag 'powerpc-5.2-5' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "This is a frustratingly large batch at rc5. Some of these were sent
  earlier but were missed by me due to being distracted by other things,
  and some took a while to track down due to needing manual bisection on
  old hardware. But still we clearly need to improve our testing of KVM,
  and of 32-bit, so that we catch these earlier.

  Summary: seven fixes, all for bugs introduced this cycle.

   - The commit to add KASAN support broke booting on 32-bit SMP
     machines, due to a refactoring that moved some setup out of the
     secondary CPU path.

   - A fix for another 32-bit SMP bug introduced by the fast syscall
     entry implementation for 32-bit BOOKE. And a build fix for the same
     commit.

   - Our change to allow the DAWR to be force enabled on Power9
     introduced a bug in KVM, where we clobber r3 leading to a host
     crash.

   - The same commit also exposed a previously unreachable bug in the
     nested KVM handling of DAWR, which could lead to an oops in a
     nested host.

   - One of the DMA reworks broke the b43legacy WiFi driver on some
     people's powermacs, fix it by enabling a 30-bit ZONE_DMA on 32-bit.

   - A fix for TLB flushing in KVM introduced a new bug, as it neglected
     to also flush the ERAT, this could lead to memory corruption in the
     guest.

  Thanks to: Aaro Koskinen, Christoph Hellwig, Christophe Leroy, Larry
  Finger, Michael Neuling, Suraj Jitindar Singh"

* tag 'powerpc-5.2-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  KVM: PPC: Book3S HV: Invalidate ERAT when flushing guest TLB entries
  powerpc: enable a 30-bit ZONE_DMA for 32-bit pmac
  KVM: PPC: Book3S HV: Only write DAWR[X] when handling h_set_dawr in real mode
  KVM: PPC: Book3S HV: Fix r3 corruption in h_set_dabr()
  powerpc/32: fix build failure on book3e with KVM
  powerpc/booke: fix fast syscall entry on SMP
  powerpc/32s: fix initial setup of segment registers on secondary CPU

4 years agoBluetooth: Fix regression with minimum encryption key size alignment
Marcel Holtmann [Sat, 22 Jun 2019 13:47:01 +0000 (15:47 +0200)]
Bluetooth: Fix regression with minimum encryption key size alignment

When trying to align the minimum encryption key size requirement for
Bluetooth connections, it turns out doing this in a central location in
the HCI connection handling code is not possible.

Original Bluetooth version up to 2.0 used a security model where the
L2CAP service would enforce authentication and encryption.  Starting
with Bluetooth 2.1 and Secure Simple Pairing that model has changed into
that the connection initiator is responsible for providing an encrypted
ACL link before any L2CAP communication can happen.

Now connecting Bluetooth 2.1 or later devices with Bluetooth 2.0 and
before devices are causing a regression.  The encryption key size check
needs to be moved out of the HCI connection handling into the L2CAP
channel setup.

To achieve this, the current check inside hci_conn_security() has been
moved into l2cap_check_enc_key_size() helper function and then called
from four decisions point inside L2CAP to cover all combinations of
Secure Simple Pairing enabled devices and device using legacy pairing
and legacy service security model.

Fixes: d5bb334a8e17 ("Bluetooth: Align minimum encryption key size for LE and BR/EDR connections")
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=203643
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agoposix-timers: Use spin_lock_irq() in itimer_delete()
Sebastian Andrzej Siewior [Fri, 21 Jun 2019 14:36:43 +0000 (16:36 +0200)]
posix-timers: Use spin_lock_irq() in itimer_delete()

itimer_delete() uses spin_lock_irqsave() to obtain a `flags' variable
which can then be passed to unlock_timer(). It uses already spin_lock
locking for the structure instead of lock_timer() because it has a timer
which can not be removed by others at this point. The cleanup is always
performed with enabled interrupts.

Use spin_lock_irq() / spin_unlock_irq() so the `flags' variable can be
removed.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190621143643.25649-3-bigeasy@linutronix.de
4 years agoposix-timers: Remove "it_signal = NULL" assignment in itimer_delete()
Sebastian Andrzej Siewior [Fri, 21 Jun 2019 14:36:42 +0000 (16:36 +0200)]
posix-timers: Remove "it_signal = NULL" assignment in itimer_delete()

itimer_delete() is invoked during do_exit(). At this point it is the
last thread in the group dying and doing the clean up.
Since it is the last thread in the group, there can not be any other
task attempting to lock the itimer which means the NULL assignment (which
avoids lookups in __lock_timer()) is not required.

The assignment and comment was copied in commit 0e568881178ff ("[PATCH]
fix posix-timers to have proper per-process scope") from
sys_timer_delete() which was/is the syscall interface and requires the
assignment.

Remove the superfluous ->it_signal = NULL assignment.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190621143643.25649-2-bigeasy@linutronix.de
4 years agotimekeeping: Add missing _ns functions for coarse accessors
Jason A. Donenfeld [Fri, 21 Jun 2019 20:32:49 +0000 (22:32 +0200)]
timekeeping: Add missing _ns functions for coarse accessors

This further unifies the accessors for the fast and coarse functions, so
that the same types of functions are available for each. There was also
a bit of confusion with the documentation, which prior advertised a
function that has never existed. Finally, the vanilla ktime_get_coarse()
was omitted from the API originally, so this fills this oversight.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/20190621203249.3909-3-Jason@zx2c4.com
4 years agotimekeeping: Use proper clock specifier names in functions
Jason A. Donenfeld [Fri, 21 Jun 2019 20:32:48 +0000 (22:32 +0200)]
timekeeping: Use proper clock specifier names in functions

This makes boot uniformly boottime and tai uniformly clocktai, to
address the remaining oversights.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/20190621203249.3909-2-Jason@zx2c4.com
4 years agotimekeeping: Use proper ktime_add when adding nsecs in coarse offset
Jason A. Donenfeld [Fri, 21 Jun 2019 20:32:47 +0000 (22:32 +0200)]
timekeeping: Use proper ktime_add when adding nsecs in coarse offset

While this doesn't actually amount to a real difference, since the macro
evaluates to the same thing, every place else operates on ktime_t using
these functions, so let's not break the pattern.

Fixes: e3ff9c3678b4 ("timekeeping: Repair ktime_get_coarse*() granularity")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/20190621203249.3909-1-Jason@zx2c4.com
4 years agoMerge branch 'linus' into timers/core
Thomas Gleixner [Sat, 22 Jun 2019 10:07:35 +0000 (12:07 +0200)]
Merge branch 'linus' into timers/core

Pick up upstream fixes for pending changes.

4 years agokselftests: timers: freq-step: Update maximum acceptable precision and errors
Miroslav Lichvar [Tue, 18 Jun 2019 16:06:12 +0000 (18:06 +0200)]
kselftests: timers: freq-step: Update maximum acceptable precision and errors

PTI has a significant impact on precision of the MONOTONIC_RAW clock,
which prevents a lot of computers from running the freq-step test.
Increase the maximum acceptable precision for the test to not be skipped
to 500 nanoseconds.

After commit 78b98e3c5a66 ("timekeeping/ntp: Determine the multiplier
directly from NTP tick length") the frequency and time errors should be
much smaller. Reduce the maximum acceptable values for the test to pass
to 0.02 ppm and 50 nanoseconds respectively.

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Link: https://lkml.kernel.org/r/20190618160612.21957-1-mlichvar@redhat.com
4 years agontp: Limit TAI-UTC offset
Miroslav Lichvar [Tue, 18 Jun 2019 15:47:13 +0000 (17:47 +0200)]
ntp: Limit TAI-UTC offset

Don't allow the TAI-UTC offset of the system clock to be set by adjtimex()
to a value larger than 100000 seconds.

This prevents an overflow in the conversion to int, prevents the CLOCK_TAI
clock from getting too far ahead of the CLOCK_REALTIME clock, and it is
still large enough to allow leap seconds to be inserted at the maximum rate
currently supported by the kernel (once per day) for the next ~270 years,
however unlikely it is that someone can survive a catastrophic event which
slowed down the rotation of the Earth so much.

Reported-by: Weikang shi <swkhack@gmail.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20190618154713.20929-1-mlichvar@redhat.com
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Sat, 22 Jun 2019 05:23:35 +0000 (22:23 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix leak of unqueued fragments in ipv6 nf_defrag, from Guillaume
    Nault.

 2) Don't access the DDM interface unless the transceiver implements it
    in bnx2x, from Mauro S. M. Rodrigues.

 3) Don't double fetch 'len' from userspace in sock_getsockopt(), from
    JingYi Hou.

 4) Sign extension overflow in lio_core, from Colin Ian King.

 5) Various netem bug fixes wrt. corrupted packets from Jakub Kicinski.

 6) Fix epollout hang in hvsock, from Sunil Muthuswamy.

 7) Fix regression in default fib6_type, from David Ahern.

 8) Handle memory limits in tcp_fragment more appropriately, from Eric
    Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (24 commits)
  tcp: refine memory limit test in tcp_fragment()
  inet: clear num_timeout reqsk_alloc()
  net: mvpp2: debugfs: Add pmap to fs dump
  ipv6: Default fib6_type to RTN_UNICAST when not set
  net: hns3: Fix inconsistent indenting
  net/af_iucv: always register net_device notifier
  net/af_iucv: build proper skbs for HiperTransport
  net/af_iucv: remove GFP_DMA restriction for HiperTransport
  net: dsa: mv88e6xxx: fix shift of FID bits in mv88e6185_g1_vtu_loadpurge()
  hvsock: fix epollout hang from race condition
  net/udp_gso: Allow TX timestamp with UDP GSO
  net: netem: fix use after free and double free with packet corruption
  net: netem: fix backlog accounting for corrupted GSO frames
  net: lio_core: fix potential sign-extension overflow on large shift
  tipc: pass tunnel dev as NULL to udp_tunnel(6)_xmit_skb
  ip6_tunnel: allow not to count pkts on tstats by passing dev as NULL
  ip_tunnel: allow not to count pkts on tstats by setting skb's dev to NULL
  tun: wake up waitqueues after IFF_UP is set
  net: remove duplicate fetch in sock_getsockopt
  tipc: fix issues with early FAILOVER_MSG from peer
  ...

4 years agotcp: refine memory limit test in tcp_fragment()
Eric Dumazet [Fri, 21 Jun 2019 13:09:55 +0000 (06:09 -0700)]
tcp: refine memory limit test in tcp_fragment()

tcp_fragment() might be called for skbs in the write queue.

Memory limits might have been exceeded because tcp_sendmsg() only
checks limits at full skb (64KB) boundaries.

Therefore, we need to make sure tcp_fragment() wont punish applications
that might have setup very low SO_SNDBUF values.

Fixes: f070ef2ac667 ("tcp: tcp_fragment() should apply sane memory limits")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Christoph Paasch <cpaasch@apple.com>
Tested-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Linus Torvalds [Fri, 21 Jun 2019 21:47:09 +0000 (14:47 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/rdma/rdma

Pull rdma fixes from Doug Ledford:
 "This is probably our last -rc pull request. We don't have anything
  else outstanding at the moment anyway, and with the summer months on
  us and people taking trips, I expect the next weeks leading up to the
  merge window to be pretty calm and sedate.

  This has two simple, no brainer fixes for the EFA driver.

  Then it has ten not quite so simple fixes for the hfi1 driver. The
  problem with them is that they aren't simply one liner typo fixes.
  They're still fixes, but they're more complex issues like livelock
  under heavy load where the answer was to change work queue usage and
  spinlock usage to resolve the problem, or issues with orphaned
  requests during certain types of failures like link down which
  required some more complex work to fix too. They all look like
  legitimate fixes to me, they just aren't small like I wish they were.

  Summary:

   - 2 minor EFA fixes

   - 10 hfi1 fixes related to scaling issues"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/efa: Handle mmap insertions overflow
  RDMA/efa: Fix success return value in case of error
  IB/hfi1: Handle port down properly in pio
  IB/hfi1: Handle wakeup of orphaned QPs for pio
  IB/hfi1: Wakeup QPs orphaned on wait list after flush
  IB/hfi1: Use aborts to trigger RC throttling
  IB/hfi1: Create inline to get extended headers
  IB/hfi1: Silence txreq allocation warnings
  IB/hfi1: Avoid hardlockup with flushlist_lock
  IB/hfi1: Correct tid qp rcd to match verbs context
  IB/hfi1: Close PSM sdma_progress sleep window
  IB/hfi1: Validate fault injection opcode user input

4 years agoMerge tag 'nfs-for-5.2-3' of git://git.linux-nfs.org/projects/anna/linux-nfs
Linus Torvalds [Fri, 21 Jun 2019 20:45:41 +0000 (13:45 -0700)]
Merge tag 'nfs-for-5.2-3' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull more NFS client fixes from Anna Schumaker:
 "These are mostly refcounting issues that people have found recently.
  The revert fixes a suspend recovery performance issue.

   - SUNRPC: Fix a credential refcount leak

   - Revert "SUNRPC: Declare RPC timers as TIMER_DEFERRABLE"

   - SUNRPC: Fix xps refcount imbalance on the error path

   - NFS4: Only set creation opendata if O_CREAT"

* tag 'nfs-for-5.2-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  SUNRPC: Fix a credential refcount leak
  Revert "SUNRPC: Declare RPC timers as TIMER_DEFERRABLE"
  net :sunrpc :clnt :Fix xps refcount imbalance on the error path
  NFS4: Only set creation opendata if O_CREAT

4 years agox86/vdso: Prevent segfaults due to hoisted vclock reads
Andy Lutomirski [Fri, 21 Jun 2019 15:43:04 +0000 (08:43 -0700)]
x86/vdso: Prevent segfaults due to hoisted vclock reads

GCC 5.5.0 sometimes cleverly hoists reads of the pvclock and/or hvclock
pages before the vclock mode checks.  This creates a path through
vclock_gettime() in which no vclock is enabled at all (due to disabled
TSC on old CPUs, for example) but the pvclock or hvclock page
nevertheless read.  This will segfault on bare metal.

This fixes commit 459e3a21535a ("gcc-9: properly declare the
{pv,hv}clock_page storage") in the sense that, before that commit, GCC
didn't seem to generate the offending code.  There was nothing wrong
with that commit per se, and -stable maintainers should backport this to
all supported kernels regardless of whether the offending commit was
present, since the same crash could just as easily be triggered by the
phase of the moon.

On GCC 9.1.1, this doesn't seem to affect the generated code at all, so
I'm not too concerned about performance regressions from this fix.

Cc: stable@vger.kernel.org
Cc: x86@kernel.org
Cc: Borislav Petkov <bp@alien8.de>
Reported-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agoSUNRPC: Fix a credential refcount leak
Trond Myklebust [Thu, 20 Jun 2019 14:47:40 +0000 (10:47 -0400)]
SUNRPC: Fix a credential refcount leak

All callers of __rpc_clone_client() pass in a value for args->cred,
meaning that the credential gets assigned and referenced in
the call to rpc_new_client().

Reported-by: Ido Schimmel <idosch@idosch.org>
Fixes: 79caa5fad47c ("SUNRPC: Cache cred of process creating the rpc_client")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
4 years agoRevert "SUNRPC: Declare RPC timers as TIMER_DEFERRABLE"
Anna Schumaker [Tue, 18 Jun 2019 18:57:33 +0000 (14:57 -0400)]
Revert "SUNRPC: Declare RPC timers as TIMER_DEFERRABLE"

Jon Hunter reports:
  "I have been noticing intermittent failures with a system suspend test on
   some of our machines that have a NFS mounted root file-system. Bisecting
   this issue points to your commit 431235818bc3 ("SUNRPC: Declare RPC
   timers as TIMER_DEFERRABLE") and reverting this on top of v5.2-rc3 does
   appear to resolve the problem.

   The cause of the suspend failure appears to be a long delay observed
   sometimes when resuming from suspend, and this is causing our test to
   timeout."

This reverts commit 431235818bc3a919ca7487500c67c3144feece80.

Reported-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
4 years agonet :sunrpc :clnt :Fix xps refcount imbalance on the error path
Lin Yi [Mon, 10 Jun 2019 02:16:56 +0000 (10:16 +0800)]
net :sunrpc :clnt :Fix xps refcount imbalance on the error path

rpc_clnt_add_xprt take a reference to struct rpc_xprt_switch, but forget
to release it before return, may lead to a memory leak.

Signed-off-by: Lin Yi <teroincn@163.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
4 years agoNFS4: Only set creation opendata if O_CREAT
Benjamin Coddington [Fri, 7 Jun 2019 10:37:30 +0000 (06:37 -0400)]
NFS4: Only set creation opendata if O_CREAT

We can end up in nfs4_opendata_alloc during task exit, in which case
current->fs has already been cleaned up.  This leads to a crash in
current_umask().

Fix this by only setting creation opendata if we are actually doing an open
with O_CREAT.  We can drop the check for NULL nfs4_open_createattrs, since
O_CREAT will never be set for the recovery path.

Suggested-by: Trond Myklebust <trondmy@hammerspace.com>
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
4 years agoMerge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Fri, 21 Jun 2019 18:11:30 +0000 (11:11 -0700)]
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fix from Russell King:
 "Just one ARM fix this time around for Jason Donenfeld, fixing a
  problem with the VDSO generation on big endian"

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8867/1: vdso: pass --be8 to linker if necessary

4 years agoMerge tag 'drm-fixes-2019-06-21' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 21 Jun 2019 18:03:33 +0000 (11:03 -0700)]
Merge tag 'drm-fixes-2019-06-21' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Just catching up on the week since back from holidays, everything
  seems quite sane.

  core:
   - copy_to_user fix for really legacy codepaths.

  vmwgfx:
   - two dma fixes
   - one virt hw interaction fix

  i915:
   - modesetting fix
   - gvt fix

  panfrost:
   - BO unmapping fix

  imx:
   - image converter fixes"

* tag 'drm-fixes-2019-06-21' of git://anongit.freedesktop.org/drm/drm:
  drm/i915: Don't clobber M/N values during fastset check
  drm: return -EFAULT if copy_to_user() fails
  drm/panfrost: Make sure a BO is only unmapped when appropriate
  drm/i915/gvt: ignore unexpected pvinfo write
  gpu: ipu-v3: image-convert: Fix image downsize coefficients
  gpu: ipu-v3: image-convert: Fix input bytesperline for packed formats
  gpu: ipu-v3: image-convert: Fix input bytesperline width/height align
  drm/vmwgfx: fix a warning due to missing dma_parms
  drm/vmwgfx: Honor the sg list segment size limitation
  drm/vmwgfx: Use the backdoor port if the HB port is not available

4 years agoMerge tag 'staging-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Fri, 21 Jun 2019 17:20:19 +0000 (10:20 -0700)]
Merge tag 'staging-5.2-rc6' of git://git./linux/kernel/git/gregkh/staging

Pull staging/IIO/counter fixes from Greg KH:
 "Here are some small driver bugfixes for some staging/iio/counter
  drivers.

  Staging and IIO have been lumped together for a while, as those
  subsystems cross the areas a log, and counter is used by IIO, so
  that's why they are all in one pull request here.

  These are small fixes for reported issues in some iio drivers, the
  erofs filesystem, and a build issue for counter code.

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

* tag 'staging-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: erofs: add requirements field in superblock
  counter/ftm-quaddec: Add missing dependencies in Kconfig
  staging: iio: adt7316: Fix build errors when GPIOLIB is not set
  iio: temperature: mlx90632 Relax the compatibility check
  iio: imu: st_lsm6dsx: fix PM support for st_lsm6dsx i2c controller
  staging:iio:ad7150: fix threshold mode config bit

4 years agoMerge tag 'char-misc-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Fri, 21 Jun 2019 17:18:16 +0000 (10:18 -0700)]
Merge tag 'char-misc-5.2-rc6' of git://git./linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are a number of small driver fixes for 5.2-rc6

  Nothing major, just fixes for reported issues:
   - soundwire fixes
   - thunderbolt fixes
   - MAINTAINERS update for fpga maintainer change
   - binder bugfix
   - habanalabs 64bit pointer fix
   - documentation updates

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

* tag 'char-misc-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  habanalabs: use u64_to_user_ptr() for reading user pointers
  doc: fix documentation about UIO_MEM_LOGICAL using
  MAINTAINERS / Documentation: Thorsten Scherer is the successor of Gavin Schenk
  docs: fb: Add TER16x32 to the available font names
  MAINTAINERS: fpga: hand off maintainership to Moritz
  thunderbolt: Implement CIO reset correctly for Titan Ridge
  binder: fix possible UAF when freeing buffer
  thunderbolt: Make sure device runtime resume completes before taking domain lock
  soundwire: intel: set dai min and max channels correctly
  soundwire: stream: fix bad unlock balance
  soundwire: stream: fix out of boundary access on port properties

4 years agoMerge tag 'usb-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Fri, 21 Jun 2019 17:16:41 +0000 (10:16 -0700)]
Merge tag 'usb-5.2-rc6' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are four small USB fixes for 5.2-rc6.

  They include two xhci bugfixes, a chipidea fix, and a small dwc2 fix.
  Nothing major, just nice things to get resolved for reported issues.

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

* tag 'usb-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  xhci: detect USB 3.2 capable host controllers correctly
  usb: xhci: Don't try to recover an endpoint if port is in error state.
  usb: dwc2: Use generic PHY width in params setup
  usb: chipidea: udc: workaround for endpoint conflict issue

4 years agoMerge tag 'spdx-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Fri, 21 Jun 2019 16:58:42 +0000 (09:58 -0700)]
Merge tag 'spdx-5.2-rc6' of git://git./linux/kernel/git/gregkh/spdx

Pull still more SPDX updates from Greg KH:
 "Another round of SPDX updates for 5.2-rc6

  Here is what I am guessing is going to be the last "big" SPDX update
  for 5.2. It contains all of the remaining GPLv2 and GPLv2+ updates
  that were "easy" to determine by pattern matching. The ones after this
  are going to be a bit more difficult and the people on the spdx list
  will be discussing them on a case-by-case basis now.

  Another 5000+ files are fixed up, so our overall totals are:
Files checked:            64545
Files with SPDX:          45529

  Compared to the 5.1 kernel which was:
Files checked:            63848
Files with SPDX:          22576

  This is a huge improvement.

  Also, we deleted another 20000 lines of boilerplate license crud,
  always nice to see in a diffstat"

* tag 'spdx-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx: (65 commits)
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 507
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 506
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 505
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 503
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 502
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 501
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 498
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 496
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 495
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 491
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 490
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 489
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 488
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 487
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 486
  treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 485
  ...

4 years agoMerge tag '5.2-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Fri, 21 Jun 2019 16:51:44 +0000 (09:51 -0700)]
Merge tag '5.2-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Four small SMB3 fixes, all for stable"

* tag '5.2-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: fix GlobalMid_Lock bug in cifs_reconnect
  SMB3: retry on STATUS_INSUFFICIENT_RESOURCES instead of failing write
  cifs: add spinlock for the openFileList to cifsInodeInfo
  cifs: fix panic in smb2_reconnect

5 years agoMerge tag 'imx-drm-fixes-2019-06-20' of git://git.pengutronix.de/git/pza/linux into...
Dave Airlie [Fri, 21 Jun 2019 01:44:20 +0000 (11:44 +1000)]
Merge tag 'imx-drm-fixes-2019-06-20' of git://git.pengutronix.de/git/pza/linux into drm-fixes

drm/imx: ipu-v3 image converter fixes

This series fixes input buffer alignment and downsizer configuration
to adhere to IPU mem2mem CSC/scaler hardware restrictions in certain
downscaling ratios.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://patchwork.freedesktop.org/patch/msgid/1561040798.14349.20.camel@pengutronix.de
5 years agoMerge tag 'drm-intel-fixes-2019-06-20' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 21 Jun 2019 01:39:14 +0000 (11:39 +1000)]
Merge tag 'drm-intel-fixes-2019-06-20' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

drm/i915 fixes for v5.2-rc6:
- GVT: Fix reserved PVINFO register write (Weinan)
- Avoid clobbering M/N values in fastset fuzzy checks (Ville)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87pnn8sbdp.fsf@intel.com
5 years agoMerge tag 'drm-misc-fixes-2019-06-19' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 21 Jun 2019 01:35:12 +0000 (11:35 +1000)]
Merge tag 'drm-misc-fixes-2019-06-19' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

panfrost- Only unmap BO's if they're mapped (Boris)
core- Handle buffer desc copy_to_user failure properly (Dan)

Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20190619192745.GA145841@art_vandelay
5 years agoMerge branch 'vmwgfx-fixes-5.2' of git://people.freedesktop.org/~thomash/linux into...
Dave Airlie [Fri, 21 Jun 2019 01:26:59 +0000 (11:26 +1000)]
Merge branch 'vmwgfx-fixes-5.2' of git://people.freedesktop.org/~thomash/linux into drm-fixes

A couple of fixes for vmwgfx. Two fixes for a DMA sg-list debug warning
message. These are not cc'd stable since there is no evidence of actual
breakage.
On fix for the high-bandwidth backdoor port which is cc'd stable due to
upcoming hardware, on which the code would otherwise break.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Hellstrom <VMware> <thomas@shipmail.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190618072255.2720-1-thomas@shipmail.org
5 years agoARM: 8867/1: vdso: pass --be8 to linker if necessary
Jason A. Donenfeld [Mon, 17 Jun 2019 12:29:19 +0000 (13:29 +0100)]
ARM: 8867/1: vdso: pass --be8 to linker if necessary

The commit fe00e50b2db8 ("ARM: 8858/1: vdso: use $(LD) instead of $(CC)
to link VDSO") removed the passing of CFLAGS, since ld doesn't take
those directly. However, prior, big-endian ARM was relying on gcc to
translate its -mbe8 option into ld's --be8 option. Lacking this, ld
generated be32 code, making the VDSO generate SIGILL when called by
userspace.

This commit passes --be8 if CONFIG_CPU_ENDIAN_BE8 is enabled.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
5 years agoMerge tag 'ovl-fixes-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszere...
Linus Torvalds [Thu, 20 Jun 2019 21:19:34 +0000 (14:19 -0700)]
Merge tag 'ovl-fixes-5.2-rc6' of git://git./linux/kernel/git/mszeredi/vfs

Pull overlayfs fixes from Miklos Szeredi:
 "Fix two regressions in this cycle, and a couple of older bugs"

* tag 'ovl-fixes-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: make i_ino consistent with st_ino in more cases
  ovl: fix typo in MODULE_PARM_DESC
  ovl: fix bogus -Wmaybe-unitialized warning
  ovl: don't fail with disconnected lower NFS
  ovl: fix wrong flags check in FS_IOC_FS[SG]ETXATTR ioctls

5 years agoMerge tag 'fuse-fixes-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszer...
Linus Torvalds [Thu, 20 Jun 2019 21:16:16 +0000 (14:16 -0700)]
Merge tag 'fuse-fixes-5.2-rc6' of git://git./linux/kernel/git/mszeredi/fuse

Pull fuse fix from Miklos Szeredi:
 "Just a single revert, fixing a regression in -rc1"

* tag 'fuse-fixes-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  Revert "fuse: require /dev/fuse reads to have enough buffer capacity"

5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Thu, 20 Jun 2019 20:50:37 +0000 (13:50 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "Fixes for ARM and x86, plus selftest patches and nicer structs for
  nested state save/restore"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: nVMX: reorganize initial steps of vmx_set_nested_state
  KVM: arm/arm64: Fix emulated ptimer irq injection
  tests: kvm: Check for a kernel warning
  kvm: tests: Sort tests in the Makefile alphabetically
  KVM: x86/mmu: Allocate PAE root array when using SVM's 32-bit NPT
  KVM: x86: Modify struct kvm_nested_state to have explicit fields for data
  KVM: fix typo in documentation
  KVM: nVMX: use correct clean fields when copying from eVMCS
  KVM: arm/arm64: vgic: Fix kvm_device leak in vgic_its_destroy
  KVM: arm64: Filter out invalid core register IDs in KVM_GET_REG_LIST
  KVM: arm64: Implement vq_present() as a macro

5 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Thu, 20 Jun 2019 19:04:57 +0000 (12:04 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "This is mainly a couple of email address updates to MAINTAINERS, but
  we've also fixed a UAPI build issue with musl libc and an accidental
  double-initialisation of our pgd_cache due to a naming conflict with a
  weak symbol.

  There are a couple of outstanding issues that have been reported, but
  it doesn't look like they're new and we're still a long way off from
  fully debugging them.

  Summary:

   - Fix use of #include in UAPI headers for compatability with musl libc

   - Update email addresses in MAINTAINERS

   - Fix initialisation of pgd_cache due to name collision with weak symbol"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64/mm: don't initialize pgd_cache twice
  MAINTAINERS: Update my email address
  arm64/sve: <uapi/asm/ptrace.h> should not depend on <uapi/linux/prctl.h>
  arm64: ssbd: explicitly depend on <linux/prctl.h>
  MAINTAINERS: Update my email address to use @kernel.org

5 years agoMerge tag 's390-5.2-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Thu, 20 Jun 2019 19:03:41 +0000 (12:03 -0700)]
Merge tag 's390-5.2-5' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Heiko Carstens:

 - Disable address-of-packed-member warning in s390 specific boot code
   to get rid of a gcc9 warning which otherwise is already disabled for
   the whole kernel.

 - Fix yet another compiler error seen with CONFIG_OPTIMIZE_INLINING
   enabled.

 - Fix memory leak in vfio-ccw code on module exit.

* tag 's390-5.2-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  vfio-ccw: Destroy kmem cache region on module exit
  s390/ctl_reg: mark __ctl_set_bit and __ctl_clear_bit as __always_inline
  s390/boot: disable address-of-packed-member warning

5 years agoMerge tag 'for_v5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Linus Torvalds [Thu, 20 Jun 2019 17:12:53 +0000 (10:12 -0700)]
Merge tag 'for_v5.2-rc6' of git://git./linux/kernel/git/jack/linux-fs

Pull two misc vfs fixes from Jan Kara:
 "One small quota fix fixing spurious EDQUOT errors and one fanotify fix
  fixing a bug in the new fanotify FID reporting code"

* tag 'for_v5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  fanotify: update connector fsid cache on add mark
  quota: fix a problem about transfer quota