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next/cleanups-fixes
This is a merge of the cleanup and fixes-non-critical branches for the 4.7
merge window. It seems more appropriate to send a single pull request
for these than two separate ones, as both branches really contain both
fixes and cleanups.
* next/cleanup:
ARM: debug: remove extraneous DEBUG_HI3716_UART option
ARM: davinci: use IRQCHIP_DECLARE for cp_intc
ARM: davinci: remove unused DA8XX_NUM_UARTS
ARM: davinci: simplify call to of populate
ARM: DaVinci USB: removed deprecated properties from MUSB config
ARM: rockchip: Fix use of plain integer as NULL pointer
ARM: realview: hide unused 'pmu_device' object
soc: versatile: dynamically detect RealView HBI numbers
* next/fixes-non-critical:
ARM: dts: exynos: Add interrupt line to MAX8997 PMIC on exynos4210-trats
ARM: dts: exynos: Fix regulator name to avoid forbidden character on exynos4210-trats
ARM: dts: exynos: Add MFC memory banks for Peach boards
ARM: OMAP2+: n900 needs MMC slot names for legacy user space
ARM: OMAP2+: Add more functions to pwm pdata for ir-rx51
ARM: EXYNOS: Properly skip unitialized parent clock in power domain on
ARM: OMAP2+: Simplify auxdata by using the generic match
of/platform: Allow secondary compatible match in of_dev_lookup
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/fixes-non-critical
Merge "non urgent auxdata fix for v4.7 merge window" from Tony Lindgren:
Device tree auxdata handling fix that allows a match based on the
compatible string if no exact match based on the IO address is found.
This leaves out the need to patch auxdata for each driver when adding
new SoCs. And it also reprotedly fixes the issue of passing auxdata
to a child if the parent instantiates the child from DT as discussed
in the "[PATCH] of/platform: Allow secondary compatible match in
of_dev_lookup" mailing list thread.
As a minimal use case, let's also convert omap pinctrl auxdatato
use a generic match.
There is no need to get this in to the v4.6-rc cycle and it can wait
for v4.7 merge window. Note that these changes have now been sitting
in Linux next for about two weeks so far as I wanted to make sure no
new issues are popping up.
* tag 'omap-for-v4.7/auxdata-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Simplify auxdata by using the generic match
of/platform: Allow secondary compatible match in of_dev_lookup
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We can now just use the compatible if there's no need to have
device instance specific auxdata.
Signed-off-by: Tony Lindgren <tony@atomide.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/fixes-non-critical
Merge "omap legacy boot vs dt boot fixes for v4.7 merge window"
from Tony Lindgren:
Legacy booting vs device tree booting fixes for omaps for
v4.7 merge window. These are not considered urgent fixes enough
for the v4.6-rc cycle, but we need them in v4.7 in order to drop
the last remaining board-*.c files for omap3 for v4.8 merge window.
On Nokia N900, we need to pass the MMC slot names for the legacy
user space to work. Let's do that using auxdata as the driver is
setting up things already with the pdata for legacy booting. Then
we can later on discuss if we may want to have some generic binding
describing where the MMC slots are on the device.
N900 also has had the ir-rx51 device driver unusable with multiarch
for a long time. Let's pass the dmtimer data in pdata for the driver
to get it going again. Then once things are working, we can eventually
change the driver to use just hrtimer and PWM framework. The driver
changes will be queued separately.
* tag 'omap-for-v4.7/legacy-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: n900 needs MMC slot names for legacy user space
ARM: OMAP2+: Add more functions to pwm pdata for ir-rx51
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Let's pass the slot names in pdata like the legacy code does.
Once we have a generic DT binding for the slot names we can
switch to that.
Tested-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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Before we start removing omap3 legacy booting support, let's make n900
DT booting behave the same way for ir-rx51 as the legacy booting does.
For now, we need to pass pdata to the ir-rx51 driver. This means that
the n900 tree can move to using DT based booting without having to carry
all the legacy platform data with it when it gets dropped from the mainline
tree.
Note that the ir-rx51 driver is currently disabled because of the
dependency to !ARCH_MULTIPLATFORM. This will get sorted out later
with the help of drivers/pwm/pwm-omap-dmtimer.c. But first we need
to add chained IRQ support to dmtimer code to avoid introducing new
custom frameworks.
So let's just pass the necessary dmtimer functions to ir-rx51 so we
can get it working in the following patch.
Cc: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into next/fixes-non-critical
Merge "Samsung DTS non-critical fixes for v4.7":
1. Fix s5p-mfc driver probe on Exynos542x Peach boards (need to provide MFC
memory banks). On these boards this was broken for long time but
apparently no one enabled this driver till now.
2. Fix creation of debugfs entries for one regulator on Exynos4210
Trats board.
3. Fix probing of max8997 MFD driver (and its children) because
of missing interrupt. Actually the current version of the driver probes
(just without interrupts) but after switching to regmap and regmap-irq,
the interrupt will be mandatory.
* tag 'samsung-fixes-non-critical-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
ARM: dts: exynos: Add interrupt line to MAX8997 PMIC on exynos4210-trats
ARM: dts: exynos: Fix regulator name to avoid forbidden character on exynos4210-trats
ARM: dts: exynos: Add MFC memory banks for Peach boards
ARM: EXYNOS: Properly skip unitialized parent clock in power domain on
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MAX8997 PMIC requires interrupt and fails probing without it.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Fixes: d105f0b1215d ("ARM: dts: Add basic dts file for Samsung Trats board")
Cc: <stable@vger.kernel.org>
[k.kozlowski: Write commit message, add CC-stable]
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
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exynos4210-trats
The usage of slash character causes failure when creating regulator
debugfs entry.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
[k.kozlowski: Write commit message]
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
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The MFC nodes with the memory regions reserved for memory allocations
are missing in the Exynos5420 Peach Pit and Exynos5800 Peach Pi DTS.
This causes the s5p-mfc driver probe to fail with the following error:
[ 4.140647] s5p_mfc_alloc_memdevs:1072: Failed to declare coherent memory for MFC device
[ 4.216163] s5p-mfc: probe of 11000000.codec failed with error -12
Add the missing nodes so the driver probes and the {en,de}coder video
nodes are registered correctly:
[ 4.096277] s5p-mfc 11000000.codec: decoder registered as /dev/video4
[ 4.102282] s5p-mfc 11000000.codec: encoder registered as /dev/video5
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
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We want to skip reparenting a clock on turning on power domain, if we
do not have the parent yet. The parent is obtained when turning the
domain off. However due to a typo, the loop is continued on IS_ERR() of
clock being reparented, not on the IS_ERR() of the parent.
Theoretically this could lead to OOPS on first turn on of a power
domain, if there was no turn off before. Practically that should never
happen because all power domains are turned on by default (reset value,
bootloader does not turn off them usually) so the first action will be
always turn off.
Fixes: 29e5eea06bc1 ("ARM: EXYNOS: Get current parent clock for power domain on/off")
Reported-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
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DEBUG_HI3716_UART was supposed to be renamed to DEBUG_HIX5HD2_UART, but
accidentally both got left in place, which results in a build error when
CONFIG_DEBUG_UART_PHYS is not set as it should be.
This removes the old symbol.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 12aae3097454 ("ARM: debug: Rename Hi3716 to HIX5HD2")
Acked-by: Wei Xu <xuwei5@hisilicon.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci into next/cleanup
Merge "DaVinci cleanups for v4.7" from Sekhar Nori:
It includes removal of some unused macros and data- -structures and use
of helper macros to reduce code.
* tag 'davinci-for-v4.7/cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci:
ARM: davinci: use IRQCHIP_DECLARE for cp_intc
ARM: davinci: remove unused DA8XX_NUM_UARTS
ARM: davinci: simplify call to of populate
ARM: DaVinci USB: removed deprecated properties from MUSB config
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Remove boilerplate code by using IRQCHIP_DECLARE macro.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
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DA8X_NUM_UARTS not used in the code anywhere and should be determined
by DT anyway.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
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Take advantage of of_platoform_default_populate convience function.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
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The following properties of the musb_hdrc_config structure
are deprecated and no longer required/used by the MUSB driver:
.dyn_fifo
.soft_con
.dma
.dma_channels
.eps_bits
Signed-off-by: Petr Kulhavy <petr@barix.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into next/cleanup
Fix for a sparse build warning in the smp code.
* tag 'v4.7-rockchip-soc32-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
ARM: rockchip: Fix use of plain integer as NULL pointer
Signed-off-by: Olof Johansson <olof@lixom.net>
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This fixes the following sparse build warning:
mach-rockchip/platsmp.c:68:43: Using plain integer as NULL pointer
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator into next/cleanup
Versatile cleanups for the v4.7 series:
- Dynamically detect and print HBI numbers in SoC sysfs
- Hide the unused "pmu_device"
* tag 'versatile-cleanup-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator:
ARM: realview: hide unused 'pmu_device' object
soc: versatile: dynamically detect RealView HBI numbers
Signed-off-by: Olof Johansson <olof@lixom.net>
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The pmu_device is only accessed when CACHE_L2X0 is enabled,
and we get a warning otherwise:
mach-realview/realview_pbx.c:274:31: error: 'pmu_device' defined but not used [-Werror=unused-variable]
This adds another #ifdef for it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Pull ARM fixes from Russell King:
"A couple of small fixes, and wiring up the new syscalls which appeared
during the merge window"
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: 8550/1: protect idiv patching against undefined gcc behavior
ARM: wire up preadv2 and pwritev2 syscalls
ARM: SMP enable of cache maintanence broadcast
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It was reported that a kernel with CONFIG_ARM_PATCH_IDIV=y stopped
booting when compiled with the upcoming gcc 6. Turns out that turning
a function address into a writable array is undefined and gcc 6 decided
it was OK to omit the store to the first word of the function while
still preserving the store to the second word.
Even though gcc 6 is now fixed to behave more coherently, it is a
mystery that gcc 4 and gcc 5 actually produce wanted code in the kernel.
And in fact the reduced test case to illustrate the issue does indeed
break with gcc < 6 as well.
In any case, let's guard the kernel against undefined compiler behavior
by hiding the nature of the array location as suggested by gcc
developers.
Reference: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70128
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Reported-by: Marcin Juszkiewicz <mjuszkiewicz@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: stable@vger.kernel.org # v4.5
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Wire up the preadv2 and pwritev2 syscalls for ARM.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Masahiro Yamada reports that we can fail to set the FW bit in the
auxiliary control register, which enables broadcasting the cache
maintanence operations. This occurs because we only check that the
SMP/nAMP bit is set, rather than checking whether all the bits we
want to be set are set.
Rearrange the code to ensure that all desired bits are set, and only
update the register if we discover some required bits are not set.
Tested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:
"Since commit 0de798584bde ("parisc: Use generic extable search and
sort routines") module loading is boken on parisc, because the parisc
module loader wasn't prepared for the new R_PARISC_PCREL32 relocations.
In addition, due to that breakage, Mikulas Patocka noticed that
handling exceptions from modules probably never worked on parisc. It
was just masked by the fact that exceptions from modules don't happen
during normal use.
This patch series fixes those issues and survives the tests of the
lib/test_user_copy kernel module test. Some patches are tagged for
stable"
* 'parisc-4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Update comment regarding relative extable support
parisc: Unbreak handling exceptions from kernel modules
parisc: Fix kernel crash with reversed copy_from_user()
parisc: Avoid function pointers for kernel exception routines
parisc: Handle R_PARISC_PCREL32 relocations in kernel modules
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Update the comment to reflect the changes of commit 0de7985 (parisc: Use
generic extable search and sort routines).
Signed-off-by: Helge Deller <deller@gmx.de>
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Handling exceptions from modules never worked on parisc.
It was just masked by the fact that exceptions from modules
don't happen during normal use.
When a module triggers an exception in get_user() we need to load the
main kernel dp value before accessing the exception_data structure, and
afterwards restore the original dp value of the module on exit.
Noticed-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
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The kernel module testcase (lib/test_user_copy.c) exhibited a kernel
crash on parisc if the parameters for copy_from_user were reversed
("illegal reversed copy_to_user" testcase).
Fix this potential crash by checking the fault handler if the faulting
address is in the exception table.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>
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We want to avoid the kernel module loader to create function pointers
for the kernel fixup routines of get_user() and put_user(). Changing
the external reference from function type to int type fixes this.
This unbreaks exception handling for get_user() and put_user() when
called from a kernel module.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
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Commit 0de7985 (parisc: Use generic extable search and sort routines)
changed the exception tables to use 32bit relative offsets.
This patch now adds support to the kernel module loader to handle such
R_PARISC_PCREL32 relocations for 32- and 64-bit modules.
Signed-off-by: Helge Deller <deller@gmx.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI fixes from Rafael Wysocki:
"Fixes for some issues discovered after recent changes and for some
that have just been found lately regardless of those changes
(intel_pstate, intel_idle, PM core, mailbox/pcc, turbostat) plus
support for some new CPU models (intel_idle, Intel RAPL driver,
turbostat) and documentation updates (intel_pstate, PM core).
Specifics:
- intel_pstate fixes for two issues exposed by the recent switch over
from using timers and for one issue introduced during the 4.4 cycle
plus new comments describing data structures used by the driver
(Rafael Wysocki, Srinivas Pandruvada).
- intel_idle fixes related to CPU offline/online (Richard Cochran).
- intel_idle support (new CPU IDs and state definitions mostly) for
Skylake-X and Kabylake processors (Len Brown).
- PCC mailbox driver fix for an out-of-bounds memory access that may
cause the kernel to panic() (Shanker Donthineni).
- New (missing) CPU ID for one apparently overlooked Haswell model in
the Intel RAPL power capping driver (Srinivas Pandruvada).
- Fix for the PM core's wakeup IRQs framework to make it work after
wakeup settings reconfiguration from sysfs (Grygorii Strashko).
- Runtime PM documentation update to make it describe what needs to
be done during device removal more precisely (Krzysztof Kozlowski).
- Stale comment removal cleanup in the cpufreq-dt driver (Viresh
Kumar).
- turbostat utility fixes and support for Broxton, Skylake-X and
Kabylake processors (Len Brown)"
* tag 'pm+acpi-4.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (28 commits)
PM / wakeirq: fix wakeirq setting after wakup re-configuration from sysfs
tools/power turbostat: work around RC6 counter wrap
tools/power turbostat: initial KBL support
tools/power turbostat: initial SKX support
tools/power turbostat: decode BXT TSC frequency via CPUID
tools/power turbostat: initial BXT support
tools/power turbostat: print IRTL MSRs
tools/power turbostat: SGX state should print only if --debug
intel_idle: Add KBL support
intel_idle: Add SKX support
intel_idle: Clean up all registered devices on exit.
intel_idle: Propagate hot plug errors.
intel_idle: Don't overreact to a cpuidle registration failure.
intel_idle: Setup the timer broadcast only on successful driver load.
intel_idle: Avoid a double free of the per-CPU data.
intel_idle: Fix dangling registration on error path.
intel_idle: Fix deallocation order on the driver exit path.
intel_idle: Remove redundant initialization calls.
intel_idle: Fix a helper function's return value.
intel_idle: remove useless return from void function.
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* pm-core:
PM / wakeirq: fix wakeirq setting after wakup re-configuration from sysfs
PM / runtime: Document steps for device removal
* powercap:
powercap: intel_rapl: Add missing Haswell model
* pm-tools:
tools/power turbostat: work around RC6 counter wrap
tools/power turbostat: initial KBL support
tools/power turbostat: initial SKX support
tools/power turbostat: decode BXT TSC frequency via CPUID
tools/power turbostat: initial BXT support
tools/power turbostat: print IRTL MSRs
tools/power turbostat: SGX state should print only if --debug
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Some processors use the Interrupt Response Time Limit (IRTL) MSR value
to describe the maximum IRQ response time latency for deep
package C-states. (Though others have the register, but do not use it)
Lets print it out to give insight into the cases where it is used.
IRTL begain in SNB, with PC3/PC6/PC7, and HSW added PC8/PC9/PC10.
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Let's see if anybody even notices. I doubt anybody uses this, and it
does expose addresses that should be randomized, so let's just remove
the code. It's old and traditional, and it used to be cute, but we
should have removed this long ago.
If it turns out anybody notices and this breaks something, we'll have to
revert this, and maybe we'll end up using other approaches instead
(using %pK or similar). But removing unnecessary code is always the
preferred option.
Noted-by: Emrah Demir <ed@abdsec.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull KVM fixes from Paolo Bonzini:
"Miscellaneous bugfixes.
The ARM and s390 fixes are for new regressions from the merge window,
others are usual stable material"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
compiler-gcc: disable -ftracer for __noclone functions
kvm: x86: make lapic hrtimer pinned
s390/mm/kvm: fix mis-merge in gmap handling
kvm: set page dirty only if page has been writable
KVM: x86: reduce default value of halt_poll_ns parameter
KVM: Hyper-V: do not do hypercall userspace exits if SynIC is disabled
KVM: x86: Inject pending interrupt even if pending nmi exist
arm64: KVM: Register CPU notifiers when the kernel runs at HYP
arm64: kvm: 4.6-rc1: Fix VTCR_EL2 VS setting
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When a vCPU runs on a nohz_full core, the hrtimer used by
the lapic emulation code can be migrated to another core.
When this happens, it's possible to observe milisecond
latency when delivering timer IRQs to KVM guests.
The huge latency is mainly due to the fact that
apic_timer_fn() expects to run during a kvm exit. It
sets KVM_REQ_PENDING_TIMER and let it be handled on kvm
entry. However, if the timer fires on a different core,
we have to wait until the next kvm exit for the guest
to see KVM_REQ_PENDING_TIMER set.
This problem became visible after commit 9642d18ee. This
commit changed the timer migration code to always attempt
to migrate timers away from nohz_full cores. While it's
discussable if this is correct/desirable (I don't think
it is), it's clear that the lapic emulation code has
a requirement on firing the hrtimer in the same core
where it was started. This is achieved by making the
hrtimer pinned.
Lastly, note that KVM has code to migrate timers when a
vCPU is scheduled to run in different core. However, this
forced migration may fail. When this happens, we can have
the same problem. If we want 100% correctness, we'll have
to modify apic_timer_fn() to cause a kvm exit when it runs
on a different core than the vCPU. Not sure if this is
possible.
Here's a reproducer for the issue being fixed:
1. Set all cores but core0 to be nohz_full cores
2. Start a guest with a single vCPU
3. Trace apic_timer_fn() and kvm_inject_apic_timer_irqs()
You'll see that apic_timer_fn() will run in core0 while
kvm_inject_apic_timer_irqs() runs in a different core. If
you get both on core0, try running a program that takes 100%
of the CPU and pin it to core0 to force the vCPU out.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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commit 1e133ab296f3 ("s390/mm: split arch/s390/mm/pgtable.c") dropped
some changes from commit a3a92c31bf0b ("KVM: s390: fix mismatch
between user and in-kernel guest limit") - this breaks KVM for some
memory sizes (kvm-s390: failed to commit memory region) like
exactly 2GB.
Cc: Dominik Dingel <dingel@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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In absence of shadow dirty mask, there is no need to set page dirty
if page has never been writable. This is a tiny optimization but
good to have for people who care much about dirty page tracking.
Signed-off-by: Yu Zhao <yuzhao@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Windows lets applications choose the frequency of the timer tick,
and in Windows 10 the maximum rate was changed from 1024 Hz to
2048 Hz. Unfortunately, because of the way the Windows API
works, most applications who need a higher rate than the default
64 Hz will just do
timeGetDevCaps(&tc, sizeof(tc));
timeBeginPeriod(tc.wPeriodMin);
and pick the maximum rate. This causes very high CPU usage when
playing media or games on Windows 10, even if the guest does not
actually use the CPU very much, because the frequent timer tick
causes halt_poll_ns to kick in.
There is no really good solution, especially because Microsoft
could sooner or later bump the limit to 4096 Hz, but for now
the best we can do is lower a bit the upper limit for
halt_poll_ns. :-(
Reported-by: Jon Panozzo <jonp@lime-technology.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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If SynIC is disabled, there is nothing that userspace can do to
handle these exits; on the other hand, userspace probably will
not know about KVM_EXIT_HYPERV_HCALL and complain about it or
even exit. Just prevent anything bad from happening by handling
the hypercall in KVM and returning an "invalid hypercall" code.
Fixes: 83326e43f27e9a8a501427a0060f8af519a39bb2
Cc: Andrey Smetanin <irqlevel@gmail.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Non maskable interrupts (NMI) are preferred to interrupts in current
implementation. If a NMI is pending and NMI is blocked by the result
of nmi_allowed(), pending interrupt is not injected and
enable_irq_window() is not executed, even if interrupts injection is
allowed.
In old kernel (e.g. 2.6.32), schedule() is often called in NMI context.
In this case, interrupts are needed to execute iret that intends end
of NMI. The flag of blocking new NMI is not cleared until the guest
execute the iret, and interrupts are blocked by pending NMI. Due to
this, iret can't be invoked in the guest, and the guest is starved
until block is cleared by some events (e.g. canceling injection).
This patch injects pending interrupts, when it's allowed, even if NMI
is blocked. And, If an interrupts is pending after executing
inject_pending_event(), enable_irq_window() is executed regardless of
NMI pending counter.
Cc: stable@vger.kernel.org
Signed-off-by: Yuki Shibuya <shibuya.yk@ncos.nec.co.jp>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/ARM Fixes for Linux v4.6-rc2.
Fixes a bug that corrupts stage-2 translationson 16-bit VMID equipped systems
and fixes CPU PM and Hotplug after the EL2 init code has been moved to C.
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When the kernel is running at EL2, it doesn't need init_hyp_mode() to
configure page tables for HYP. This function also registers the CPU
hotplug and lower power notifiers that cause HYP to be re-initialised
after the CPU has been reset.
To avoid losing the register state that controls stage2 translation, move
the registering of these notifiers into init_subsystems(), and add a
is_kernel_in_hyp_mode() path to each callback.
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Fixes: 1e947bad0b6 ("arm64: KVM: Skip HYP setup when already running in HYP")
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
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When we detect support for 16bit VMID in ID_AA64MMFR1, we set the
VTCR_EL2_VS field to 1 to make use of 16bit vmids. But, with
commit 3a3604bc5eb4 ("arm64: KVM: Switch to C-based stage2 init")
this is broken and we corrupt VTCR_EL2:T0SZ instead of updating the VS
field. VTCR_EL2_VS was actually defined to the field shift (19) and
not the real value for VS. This patch fixes the issue.
Fixes: commit 3a3604bc5eb4 ("arm64: KVM: Switch to C-based stage2 init")
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
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Pull MIPS fixes from Ralf Baechle:
"This is the first round of MIPS fixes for 4.6:
- Fix spelling mistakes all over arch/mips
- Provide __bswapsi2 so XZ kernel compression will build with older GCC
- ATH79 clock fixes.
- Fix clock-rated copy-paste erros in ATH79 DTS.
- Fix gisb-arb compatible string for 7435 BMIPS
- Enable NAND and UBIFS support in CI20.
- Fix BUG() assertion caused by inapropriate smp_processor_id() use.
- Fix exception handling issues for the sake of debuggers
- Fix the last remaining instance of irq_to_gpio in the db1xxx_ss PCMCIA code
- Fix MSA unaligned load failures
- Panic if kernel is configured for a not TLB-supported page size
- Bail out on unsupported relocs in modules.
- Partial fix for Qemu breakage after recent IPI rewrite
- Wire up the preadv2 and pwrite2 syscalls
- Fix the ar724x clock calculation"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: traps.c: Verify the ISA for microMIPS RDHWR emulation
MIPS: BMIPS: Fix gisb-arb compatible string for 7435
MIPS: Bail on unsupported module relocs
MIPS: dts: qca: ar9132_tl_wr1043nd_v1.dts: use "ref" for reference clock name
MIPS: ath79: Fix the ar913x reference clock rate
MIPS: ath79: Fix the ar724x clock calculation
dt-bindings: clock: qca,ath79-pll: fix copy-paste typos
MIPS: traps: Correct the SIGTRAP debug ABI in `do_watch' and `do_trap_or_bp'
FIRMWARE: Broadcom: Fix grammar of warning messages in bcm47xx_sprom.c.
MIPS: ci20: Enable NAND and UBIFS support in defconfig.
MIPS: Fix misspellings in comments.
MIPS: tlb-r4k: panic if the MMU doesn't support PAGE_SIZE
MIPS: zboot: Remove copied source files on clean
MIPS: zboot: Fix the build with XZ compression on older GCC versions
MIPS: Wire up preadv2 and pwrite2 syscalls.
MIPS: cpu_name_string: Use raw_smp_processor_id().
pcmcia: db1xxx_ss: fix last irq_to_gpio user
MIPS: Fix MSA ld unaligned failure cases
MIPS: Fix broken malta qemu
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Make sure it's the microMIPS rather than MIPS16 ISA before emulating
microMIPS RDHWR. Mostly needed as an optimisation for configurations
where `cpu_has_mmips' is hardcoded to 0 and also a good measure in case
we add further microMIPS instructions to emulate in the future, as the
corresponding MIPS16 encoding is ADDIUSP, not supposed to trap.
Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12282/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The SUN GISB arbiter was added with the wrong compatible string, leading to
using the wrong register layout, use the correct compatible string for this
chip: brcm,bcm7435-gisb-arb.
Fixes: 8394968be4c7 ("MIPS: BMIPS: Add BCM7435 dtsi")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: blogic@openwrt.org
Cc: cernekee@gmail.com
Cc: jogo@openwrt.org
Cc: jaedon.shin@gmail.com
Cc: pgynther@google.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12285/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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When an unsupported reloc is encountered in a module, we currently
blindly branch to whatever would be at its entry in the reloc handler
function pointer arrays. This may be NULL, or if the unsupported reloc
has a type greater than that of the supported reloc with the highest
type then we'll dereference some value after the function pointer array
& branch to that. The result is at best a kernel oops.
Fix this by checking that the reloc type has an entry in the function
pointer array (ie. is less than the number of items in the array) and
that the handler is non-NULL, returning an error code to fail the module
load if no handler is found.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12432/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Current ath79 clock.c code does not read reference clock and
pll setup from devicetree. The ar724x_clocks_init() function
recreates the clocks from scratch so devicetree clock
information is dropped. After adding the code which picked up
reference clock from devicetree I have found
that kernel does not boot anymore. The SPI and UART drivers
can't get clk; here are the bootlog error messages:
of_serial: probe of 18020000.uart failed with error -22
ath79-spi: probe of 1f000000.spi failed with error -22
The problem is that clock code assumes that reference clock
name is "ref" but current dts-file uses another name: "oscillator".
This patch fixes the problem by changing external oscillator
dt node name to "ref".
Please note that there is an alternative solution for the problem:
> --- a/arch/mips/boot/dts/qca/ar9132_tl_wr1043nd_v1.dts
> +++ b/arch/mips/boot/dts/qca/ar9132_tl_wr1043nd_v1.dts
> @@ -16,6 +16,7 @@
>
> extosc: oscillator {
> compatible = "fixed-clock";
> + clock-output-names = "ref";
> #clock-cells = <0>;
> clock-frequency = <40000000>;
> };
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Alban Bedel <albeu@free.fr>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-clk@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12874/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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