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Prior to commit 3282a3da25bd ("powerpc/64: Implement soft interrupt
replay in C"), replayed interrupts returned by the regular interrupt
exit code, which performs preemption in case an interrupt had set
need_resched.
This logic was missed by the conversion. Adding preempt_disable/enable
around the interrupt replay and final irq enable will reschedule if
needed.
Fixes: 3282a3da25bd ("powerpc/64: Implement soft interrupt replay in C")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200915114650.3980244-1-npiggin@gmail.com
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The hypervisor interface has defined branch prediction security bits for
handling the link stack. Wire them up.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200825075612.224656-1-npiggin@gmail.com
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The copy buffer is implemented as a real address in the nest which is
translated from EA by copy, and used for memory access by paste. This
requires that it be invalidated by TLB invalidation.
TLBIE does invalidate the copy buffer, but TLBIEL does not. Add
cp_abort to the tlbiel sequence.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Fixup whitespace and comment formatting]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200916030234.4110379-2-npiggin@gmail.com
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Having cputable.h include mce.h means it pulls in a bunch of low level
headers (e.g., synch.h) which then can't use CPU_FTR_ definitions.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200916030234.4110379-1-npiggin@gmail.com
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Every error log reported by OPAL is exported to userspace through a
sysfs interface and notified using kobject_uevent(). The userspace
daemon (opal_errd) then reads the error log and acknowledges the error
log is saved safely to disk. Once acknowledged the kernel removes the
respective sysfs file entry causing respective resources to be
released including kobject.
However it's possible the userspace daemon may already be scanning
elog entries when a new sysfs elog entry is created by the kernel.
User daemon may read this new entry and ack it even before kernel can
notify userspace about it through kobject_uevent() call. If that
happens then we have a potential race between
elog_ack_store->kobject_put() and kobject_uevent which can lead to
use-after-free of a kernfs object resulting in a kernel crash. eg:
BUG: Unable to handle kernel data access on read at 0x6b6b6b6b6b6b6bfb
Faulting instruction address: 0xc0000000008ff2a0
Oops: Kernel access of bad area, sig: 11 [#1]
LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA PowerNV
CPU: 27 PID: 805 Comm: irq/29-opal-elo Not tainted 5.9.0-rc2-gcc-8.2.0-00214-g6f56a67bcbb5-dirty #363
...
NIP kobject_uevent_env+0xa0/0x910
LR elog_event+0x1f4/0x2d0
Call Trace:
0x5deadbeef0000122 (unreliable)
elog_event+0x1f4/0x2d0
irq_thread_fn+0x4c/0xc0
irq_thread+0x1c0/0x2b0
kthread+0x1c4/0x1d0
ret_from_kernel_thread+0x5c/0x6c
This patch fixes this race by protecting the sysfs file
creation/notification by holding a reference count on kobject until we
safely send kobject_uevent().
The function create_elog_obj() returns the elog object which if used
by caller function will end up in use-after-free problem again.
However, the return value of create_elog_obj() function isn't being
used today and there is no need as well. Hence change it to return
void to make this fix complete.
Fixes: 774fea1a38c6 ("powerpc/powernv: Read OPAL error log and export it through sysfs")
Cc: stable@vger.kernel.org # v3.15+
Reported-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
[mpe: Rework the logic to use a single return, reword comments, add oops]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201006122051.190176-1-mpe@ellerman.id.au
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There are no users of PAGE_USERIO.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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All boards have the same prom_init() function. Move it to common code and
delete the duplicates.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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Only include wm97xx touchscreen probing code, if driver is enabled.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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It turns out that in some cases there are EC events to flush in
acpi_ec_dispatch_gpe() even though the ec_no_wakeup kernel parameter
is set and the EC GPE is disabled while sleeping, so drop the
ec_no_wakeup check that prevents those events from being processed
from acpi_ec_dispatch_gpe().
Reported-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Commit 607b9df63057 ("ACPI: EC: PM: Avoid flushing EC work when EC
GPE is inactive") has been reported to cause some power button wakeup
events to be missed on some systems, so modify acpi_ec_dispatch_gpe()
to call acpi_ec_flush_work() unconditionally to effectively reverse
the changes made by that commit.
Also note that the problem which prompted commit 607b9df63057 is not
reproducible any more on the affected machine.
Fixes: 607b9df63057 ("ACPI: EC: PM: Avoid flushing EC work when EC GPE is inactive")
Reported-by: Raymond Tan <raymond.tan@intel.com>
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Signed-off-by: Marc Zyngier <maz@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
Pull ARM cpufreq updates for 5.10-rc1 from Viresh Kumar:
"- STI cpufreq driver updates to allow new hardware (Alain Volmat).
- Minor tegra driver fixes around initial frequency mismatch warnings (Jon
Hunter).
- dev_err simplification for s5pv210 driver (Krzysztof Kozlowski).
- Qcom driver updates to allow new hardware and minor cleanup (Manivannan
Sadhasivam and Matthias Kaehlcke).
- Add missing MODULE_DEVICE_TABLE for armada driver (Pali Rohár).
- Improved defer-probe handling in cpufreq-dt driver (Stephan Gerhold).
- Call dev_pm_opp_of_remove_table() unconditionally for imx driver (Viresh
Kumar)."
* 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
cpufreq: qcom: Don't add frequencies without an OPP
cpufreq: qcom-hw: Add cpufreq support for SM8250 SoC
cpufreq: qcom-hw: Use of_device_get_match_data for offsets and row size
cpufreq: qcom-hw: Use devm_platform_ioremap_resource() to simplify code
dt-bindings: cpufreq: cpufreq-qcom-hw: Document Qcom EPSS compatible
cpufreq: qcom-hw: Make use of cpufreq driver_data for passing pdev
cpufreq: armada-37xx: Add missing MODULE_DEVICE_TABLE
cpufreq: arm: Kconfig: add CPUFREQ_DT depend for STI CPUFREQ
cpufreq: dt-platdev: Blacklist st,stih418 SoC
cpufreq: sti-cpufreq: add stih418 support
cpufreq: s5pv210: Use dev_err instead of pr_err in probe
cpufreq: s5pv210: Simplify with dev_err_probe()
cpufreq: tegra186: Fix initial frequency
cpufreq: dt: Refactor initialization to handle probe deferral properly
opp: Handle multiple calls for same OPP table in _of_add_opp_table_v1()
cpufreq: imx6q: Unconditionally call dev_pm_opp_of_remove_table()
opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER
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Kexec can directly boot into a new kernel without going to complete
reboot. This can leave the previous kernel's configuration for PDC
interrupts as is.
Clear previous kernel's configuration during init by setting interrupts
in enable bank to zero. The IRQs specified in qcom,pdc-ranges property
are the only ones that can be used by the new kernel so clear only those
IRQs. The remaining ones may be in use by a different kernel and should
not be set by new kernel.
Suggested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-7-git-send-email-mkshah@codeaurora.org
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Set IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag to enable/unmask the
wakeirqs during suspend entry.
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-6-git-send-email-mkshah@codeaurora.org
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Set IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag to enable/unmask the
wakeirqs during suspend entry.
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-5-git-send-email-mkshah@codeaurora.org
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An interrupt that is disabled/masked but set for wakeup may still need to
be able to wake up the system from sleep states like "suspend to RAM".
To that effect, introduce the IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag.
If the irqchip have this flag set, the irq PM code will enable/unmask
the irqs that are marked for wakeup, but that are in a disabled state.
On resume, such irqs will be restored back to their disabled state.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
[maz: commit message fix-up]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/1601267524-20199-4-git-send-email-mkshah@codeaurora.org
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msmgpio irqchip was not using return value of irq_set_irq_wake() callback
since previously GIC-v3 irqchip neither had IRQCHIP_SKIP_SET_WAKE flag nor
it implemented .irq_set_wake callback. This lead to irq_set_irq_wake()
return error -ENXIO.
However from 'commit 4110b5cbb014 ("irqchip/gic-v3: Allow interrupt to be
configured as wake-up sources")' GIC irqchip has IRQCHIP_SKIP_SET_WAKE
flag.
Use return value from irq_set_irq_wake() and irq_chip_set_wake_parent()
instead of always returning success.
Fixes: e35a6ae0eb3a ("pinctrl/msm: Setup GPIO chip in hierarchy")
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-3-git-send-email-mkshah@codeaurora.org
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Both IRQCHIP_SET_TYPE_MASKED and IRQCHIP_MASK_ON_SUSPEND flags are already
set for msmgpio's parent PDC irqchip but GPIO interrupts do not get masked
during suspend or during setting irq type since genirq checks irqchip flag
of msmgpio irqchip which forwards these calls to its parent PDC irqchip.
Add irqchip specific flags for msmgpio irqchip to mask non wakeirqs during
suspend and mask before setting irq type. Masking before changing type make
sures any spurious interrupt is not detected during this operation.
Fixes: e35a6ae0eb3a ("pinctrl/msm: Setup GPIO chip in hierarchy")
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1601267524-20199-2-git-send-email-mkshah@codeaurora.org
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Recent laptops with dual AMD GPUs fail to suspend the discrete GPU, thus
causing lockups on system sleep and high power consumption at runtime.
The discrete GPU would normally be suspended to D3cold by turning off
ACPI _PR3 Power Resources of the Root Port above the GPU.
However on affected systems, the Root Port is hotplug-capable and
pci_bridge_d3_possible() only allows hotplug ports to go to D3 if they
belong to a Thunderbolt device or if the Root Port possesses a
"HotPlugSupportInD3" ACPI property. Neither is the case on affected
laptops. The reason for whitelisting only specific, known to work
hotplug ports for D3 is that there have been reports of SkyLake Xeon-SP
systems raising Hardware Error NMIs upon suspending their hotplug ports:
https://lore.kernel.org/linux-pci/20170503180426.GA4058@otc-nc-03/
But if a hotplug port is power manageable by ACPI (as can be detected
through presence of Power Resources and corresponding _PS0 and _PS3
methods) then it ought to be safe to suspend it to D3. To this end,
amend acpi_pci_bridge_d3() to whitelist such ports for D3.
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1222
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1252
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1304
Reported-and-tested-by: Arthur Borsboom <arthurborsboom@gmail.com>
Reported-and-tested-by: matoro <matoro@airmail.cc>
Reported-by: Aaron Zakhrov <aaron.zakhrov@gmail.com>
Reported-by: Michal Rostecki <mrostecki@suse.com>
Reported-by: Shai Coleman <git@shaicoleman.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The motivations to go rework memcpy_mcsafe() are that the benefit of
doing slow and careful copies is obviated on newer CPUs, and that the
current opt-in list of CPUs to instrument recovery is broken relative to
those CPUs. There is no need to keep an opt-in list up to date on an
ongoing basis if pmem/dax operations are instrumented for recovery by
default. With recovery enabled by default the old "mcsafe_key" opt-in to
careful copying can be made a "fragile" opt-out. Where the "fragile"
list takes steps to not consume poison across cachelines.
The discussion with Linus made clear that the current "_mcsafe" suffix
was imprecise to a fault. The operations that are needed by pmem/dax are
to copy from a source address that might throw #MC to a destination that
may write-fault, if it is a user page.
So copy_to_user_mcsafe() becomes copy_mc_to_user() to indicate
the separate precautions taken on source and destination.
copy_mc_to_kernel() is introduced as a non-SMAP version that does not
expect write-faults on the destination, but is still prepared to abort
with an error code upon taking #MC.
The original copy_mc_fragile() implementation had negative performance
implications since it did not use the fast-string instruction sequence
to perform copies. For this reason copy_mc_to_kernel() fell back to
plain memcpy() to preserve performance on platforms that did not indicate
the capability to recover from machine check exceptions. However, that
capability detection was not architectural and now that some platforms
can recover from fast-string consumption of memory errors the memcpy()
fallback now causes these more capable platforms to fail.
Introduce copy_mc_enhanced_fast_string() as the fast default
implementation of copy_mc_to_kernel() and finalize the transition of
copy_mc_fragile() to be a platform quirk to indicate 'copy-carefully'.
With this in place, copy_mc_to_kernel() is fast and recovery-ready by
default regardless of hardware capability.
Thanks to Vivek for identifying that copy_user_generic() is not suitable
as the copy_mc_to_user() backend since the #MC handler explicitly checks
ex_has_fault_handler(). Thanks to the 0day robot for catching a
performance bug in the x86/copy_mc_to_user implementation.
[ bp: Add the "why" for this change from the 0/2th message, massage. ]
Fixes: 92b0729c34ca ("x86/mm, x86/mce: Add memcpy_mcsafe()")
Reported-by: Erwin Tsaur <erwin.tsaur@intel.com>
Reported-by: 0day robot <lkp@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Tested-by: Erwin Tsaur <erwin.tsaur@intel.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/160195562556.2163339.18063423034951948973.stgit@dwillia2-desk3.amr.corp.intel.com
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In reaction to a proposal to introduce a memcpy_mcsafe_fast()
implementation Linus points out that memcpy_mcsafe() is poorly named
relative to communicating the scope of the interface. Specifically what
addresses are valid to pass as source, destination, and what faults /
exceptions are handled.
Of particular concern is that even though x86 might be able to handle
the semantics of copy_mc_to_user() with its common copy_user_generic()
implementation other archs likely need / want an explicit path for this
case:
On Fri, May 1, 2020 at 11:28 AM Linus Torvalds <torvalds@linux-foundation.org> wrote:
>
> On Thu, Apr 30, 2020 at 6:21 PM Dan Williams <dan.j.williams@intel.com> wrote:
> >
> > However now I see that copy_user_generic() works for the wrong reason.
> > It works because the exception on the source address due to poison
> > looks no different than a write fault on the user address to the
> > caller, it's still just a short copy. So it makes copy_to_user() work
> > for the wrong reason relative to the name.
>
> Right.
>
> And it won't work that way on other architectures. On x86, we have a
> generic function that can take faults on either side, and we use it
> for both cases (and for the "in_user" case too), but that's an
> artifact of the architecture oddity.
>
> In fact, it's probably wrong even on x86 - because it can hide bugs -
> but writing those things is painful enough that everybody prefers
> having just one function.
Replace a single top-level memcpy_mcsafe() with either
copy_mc_to_user(), or copy_mc_to_kernel().
Introduce an x86 copy_mc_fragile() name as the rename for the
low-level x86 implementation formerly named memcpy_mcsafe(). It is used
as the slow / careful backend that is supplanted by a fast
copy_mc_generic() in a follow-on patch.
One side-effect of this reorganization is that separating copy_mc_64.S
to its own file means that perf no longer needs to track dependencies
for its memcpy_64.S benchmarks.
[ bp: Massage a bit. ]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: <stable@vger.kernel.org>
Link: http://lore.kernel.org/r/CAHk-=wjSqtXAqfUJxFtWNwmguFASTgB0dz1dT3V-78Quiezqbg@mail.gmail.com
Link: https://lkml.kernel.org/r/160195561680.2163339.11574962055305783722.stgit@dwillia2-desk3.amr.corp.intel.com
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different models
Commit b0dbd97de1f1 ("platform/x86: asus-wmi: Add support for
SW_TABLET_MODE") added support for reporting SW_TABLET_MODE using the
Asus 0x00120063 WMI-device-id to see if various transformer models were
docked into their keyboard-dock (SW_TABLET_MODE=0) or if they were
being used as a tablet.
The new SW_TABLET_MODE support (naively?) assumed that non Transformer
devices would either not support the 0x00120063 WMI-device-id at all,
or would NOT set ASUS_WMI_DSTS_PRESENCE_BIT in their reply when querying
the device-id.
Unfortunately this is not true and we have received many bug reports about
this change causing the asus-wmi driver to always report SW_TABLET_MODE=1
on non Transformer devices. This causes libinput to think that these are
360 degree hinges style 2-in-1s folded into tablet-mode. Making libinput
suppress keyboard and touchpad events from the builtin keyboard and
touchpad. So effectively this causes the keyboard and touchpad to not work
on many non Transformer Asus models.
This commit fixes this by using the existing DMI based quirk mechanism in
asus-nb-wmi.c to allow using the 0x00120063 device-id for reporting
SW_TABLET_MODE on Transformer models and ignoring it on all other models.
Fixes: b0dbd97de1f1 ("platform/x86: asus-wmi: Add support for SW_TABLET_MODE")
Link: https://patchwork.kernel.org/patch/11780901/
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=209011
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1876997
Reported-by: Samuel Čavoj <samuel@cavoj.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Move more nitty gritty DMA implementation details into the common
internal header.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Most of the dma_direct symbols should only be used by direct.c and
mapping.c, so move them to kernel/dma. In fact more of dma-direct.h
should eventually move, but that will require more coordination with
other subsystems.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Most of dma-debug.h is not required by anything outside of kernel/dma.
Move the four declarations needed by dma-mappin.h or dma-ops providers
into dma-mapping.h and dma-map-ops.h, and move the remainder of the
file to kernel/dma/debug.h.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Just provide a weak default definition of dma_contiguous_early_fixup and
let arm override it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Merge dma-contiguous.h into dma-map-ops.h, after removing the comment
describing the contiguous allocator into kernel/dma/contigous.c.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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dma_contiguous_set_default contains a trivial assignment, and has a
single caller that is compiled if CONFIG_CMA_DMA is enabled.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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dev_set_cma_area contains a trivial assignment. It has just three
callers that all have a non-NULL device and depend on CONFIG_DMA_CMA,
so remove the wrapper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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dma_declare_contiguous is a trivial wrapper around
dma_contiguous_reserve_area and just has a single caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Split out all the bits that are purely for dma_map_ops implementations
and related code into a new <linux/dma-map-ops.h> header so that they
don't get pulled into all the drivers. That also means the architecture
specific <asm/dma-mapping.h> is not pulled in by <linux/dma-mapping.h>
any more, which leads to a missing includes that were pulled in by the
x86 or arm versions in a few not overly portable drivers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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On an embedded system with a tiny (1 MiB) CMA area for video memory, and
a simple enough video pipeline, we can decrease the CMA_ALIGNMENT by a
factor of 2 to avoid wasting memory, as all the allocations for video
buffers will be of the exact same size (dictated by the size of the
screen).
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
drm-misc-fixes for v5.9:
- Small doc fix.
- Re-add FB_ARMCLCD for android.
- Fix global-out-of-bounds read in fbcon_get_font().
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8585daa2-fcbc-3924-ac4f-e7b5668808e0@linux.intel.com
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Rejecting non-native endian BTF overlapped with the addition
of support for it.
The rest were more simple overlapping changes, except the
renesas ravb binding update, which had to follow a file
move as well as a YAML conversion.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently, sythetic events only support static string fields such as:
# echo 'test_latency u64 lat; char somename[32]' > /sys/kernel/debug/tracing/synthetic_events
Which is fine, but wastes a lot of space in the event.
It also prevents the most commonly-defined strings in the existing
trace events e.g. those defined using __string(), from being passed to
synthetic events via the trace() action.
With this change, synthetic events with dynamic fields can be defined:
# echo 'test_latency u64 lat; char somename[]' > /sys/kernel/debug/tracing/synthetic_events
And the trace() action can be used to generate events using either
dynamic or static strings:
# echo 'hist:keys=name:lat=common_timestamp.usecs-$ts0:onmatch(sys.event).test_latency($lat,name)' > /sys/kernel/debug/tracing/events
The synthetic event dynamic strings are implemented in the same way as
the existing __data_loc strings and appear as such in the format file.
[ <rostedt@goodmis.org>: added __set_synth_event_print_fmt() changes:
I added the following to make it work with trace-cmd. Dynamic strings
must have __get_str() for events in the print_fmt otherwise it can't be
parsed correctly. ]
Link: https://lore.kernel.org/r/cover.1601588066.git.zanussi@kernel.org
Link: https://lkml.kernel.org/r/3ed35b6d0e390f5b94cb4a9ba1cc18f5982ab277.1601848695.git.zanussi@kernel.org
Tested-by: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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Update Andrii Nakryiko's reviewer email to kernel.org account. This optimizes
email logistics on my side and makes it less likely for me to miss important
patches.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20201005223648.2437130-1-andrii@kernel.org
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String variables created as field variables and save variables are
already handled properly by having their values copied when set. The
same isn't done for normal variables, but needs to be - simply saving
a pointer to a string contained in an old event isn't sufficient,
since that event's data may quickly become overwritten and therefore a
string pointer to it could yield garbage.
This change uses the same mechanism as field variables and simply
appends the new strings to the existing per-element field_var_str[]
array allocated for that purpose.
Link: https://lkml.kernel.org/r/1c1a03798b02e67307412a0c719d1bfb69b13007.1601848695.git.zanussi@kernel.org
Fixes: 02205a6752f2 (tracing: Add support for 'field variables')
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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synth_field_size() returns either a positive size or an error (zero or
a negative value). However, the existing code assumes the only error
value is 0. It doesn't handle negative error codes, as it assigns
directly to field->size (a size_t; unsigned), thereby interpreting the
error code as a valid size instead.
Do the test before assignment to field->size.
[ axelrasmussen@google.com: changelog addition, first paragraph above ]
Link: https://lkml.kernel.org/r/9b6946d9776b2eeb43227678158196de1c3c6e1d.1601848695.git.zanussi@kernel.org
Fixes: 4b147936fa50 (tracing: Add support for 'synthetic' events)
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Tested-by: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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32 is too small for this value, and anyway it makes more sense to use
MAX_FILTER_STR_VAL, as this is also the value used for variable-length
__strings.
Link: https://lkml.kernel.org/r/6adfd1668ac1fd8670bd58206944a762061a5559.1601848695.git.zanussi@kernel.org
Tested-by: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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Recent improvements in LOCKDEP highlighted a potential A-A deadlock with
pcpu_freelist in NMI:
./tools/testing/selftests/bpf/test_progs -t stacktrace_build_id_nmi
[ 18.984807] ================================
[ 18.984807] WARNING: inconsistent lock state
[ 18.984808] 5.9.0-rc6-01771-g1466de1330e1 #2967 Not tainted
[ 18.984809] --------------------------------
[ 18.984809] inconsistent {INITIAL USE} -> {IN-NMI} usage.
[ 18.984810] test_progs/1990 [HC2[2]:SC0[0]:HE0:SE1] takes:
[ 18.984810] ffffe8ffffc219c0 (&head->lock){....}-{2:2}, at: __pcpu_freelist_pop+0xe3/0x180
[ 18.984813] {INITIAL USE} state was registered at:
[ 18.984814] lock_acquire+0x175/0x7c0
[ 18.984814] _raw_spin_lock+0x2c/0x40
[ 18.984815] __pcpu_freelist_pop+0xe3/0x180
[ 18.984815] pcpu_freelist_pop+0x31/0x40
[ 18.984816] htab_map_alloc+0xbbf/0xf40
[ 18.984816] __do_sys_bpf+0x5aa/0x3ed0
[ 18.984817] do_syscall_64+0x2d/0x40
[ 18.984818] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 18.984818] irq event stamp: 12
[...]
[ 18.984822] other info that might help us debug this:
[ 18.984823] Possible unsafe locking scenario:
[ 18.984823]
[ 18.984824] CPU0
[ 18.984824] ----
[ 18.984824] lock(&head->lock);
[ 18.984826] <Interrupt>
[ 18.984826] lock(&head->lock);
[ 18.984827]
[ 18.984828] *** DEADLOCK ***
[ 18.984828]
[ 18.984829] 2 locks held by test_progs/1990:
[...]
[ 18.984838] <NMI>
[ 18.984838] dump_stack+0x9a/0xd0
[ 18.984839] lock_acquire+0x5c9/0x7c0
[ 18.984839] ? lock_release+0x6f0/0x6f0
[ 18.984840] ? __pcpu_freelist_pop+0xe3/0x180
[ 18.984840] _raw_spin_lock+0x2c/0x40
[ 18.984841] ? __pcpu_freelist_pop+0xe3/0x180
[ 18.984841] __pcpu_freelist_pop+0xe3/0x180
[ 18.984842] pcpu_freelist_pop+0x17/0x40
[ 18.984842] ? lock_release+0x6f0/0x6f0
[ 18.984843] __bpf_get_stackid+0x534/0xaf0
[ 18.984843] bpf_prog_1fd9e30e1438d3c5_oncpu+0x73/0x350
[ 18.984844] bpf_overflow_handler+0x12f/0x3f0
This is because pcpu_freelist_head.lock is accessed in both NMI and
non-NMI context. Fix this issue by using raw_spin_trylock() in NMI.
Since NMI interrupts non-NMI context, when NMI context tries to lock the
raw_spinlock, non-NMI context of the same CPU may already have locked a
lock and is blocked from unlocking the lock. For a system with N CPUs,
there could be N NMIs at the same time, and they may block N non-NMI
raw_spinlocks. This is tricky for pcpu_freelist_push(), where unlike
_pop(), failing _push() means leaking memory. This issue is more likely to
trigger in non-SMP system.
Fix this issue with an extra list, pcpu_freelist.extralist. The extralist
is primarily used to take _push() when raw_spin_trylock() failed on all
the per CPU lists. It should be empty most of the time. The following
table summarizes the behavior of pcpu_freelist in NMI and non-NMI:
non-NMI pop(): use _lock(); check per CPU lists first;
if all per CPU lists are empty, check extralist;
if extralist is empty, return NULL.
non-NMI push(): use _lock(); only push to per CPU lists.
NMI pop(): use _trylock(); check per CPU lists first;
if all per CPU lists are locked or empty, check extralist;
if extralist is locked or empty, return NULL.
NMI push(): use _trylock(); check per CPU lists first;
if all per CPU lists are locked; try push to extralist;
if extralist is also locked, keep trying on per CPU lists.
Reported-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20201005165838.3735218-1-songliubraving@fb.com
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The initialization of rc in smack_from_netlbl() is pointless.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
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[Why]
Currently mode validation is bypassed if remote sink exists. That
leads to mode set issue when a BW bottle neck exists in the link path,
e.g., a DP-to-HDMI converter that only supports HDMI 1.4.
Any invalid mode passed to Linux user space will cause the modeset
failure due to limitation of Linux user space implementation.
[How]
Mode validation is skipped only if in edid override. For real remote
sink, clock limit check should be done for HDMI remote sink.
Have HDMI related remote sink going through mode validation to
elimiate modes which pixel clock exceeds BW limitation.
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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|
[Why]
Formula uses kHz in their formula while our driver operates with Hz.
[How]
Divide audio rate by 1000 on the initial variable that is entered into formula.
Signed-off-by: Chris Park <Chris.Park@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Acked-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
|
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[Why]
Sometimes CRTCs can be disabled due to display unplugging or temporarily
transition in the userspace; in these circumstances, DCE tries to set
the minimum clock threshold. When we have this situation, the function
bw_calcs is invoked with number_of_displays set to zero, making DCE set
dispclk_khz and sclk_khz to zero. For these reasons, we have seen some
ATOM bios errors that look like:
[drm:atom_op_jump [amdgpu]] *ERROR* atombios stuck in loop for more than
5secs aborting
[drm:amdgpu_atom_execute_table_locked [amdgpu]] *ERROR* atombios stuck
executing EA8A (len 761, WS 0, PS 0) @ 0xEABA
[How]
This error happens due to an attempt to optimize the bandwidth using the
sclk, and the dispclk clock set to zero. Technically we handle this in
the function dce112_set_clock, but we are not considering the case that
this value is set to zero. This commit fixes this issue by ensuring that
we never set a minimum value below the minimum clock threshold.
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
|
|
align frag_end to the next pd when there are no
page table entries on the current pde.
This fixes invalidation of larger address space areas
where some page tables are allocated and other aren't.
Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
|
|
Commit c1cf79ca5ced46 ("drm/amdgpu: use IP discovery table for renoir")
introduced a NULL pointer dereference when booting with
amdgpu.discovery=0, because it removed the call of vega10_reg_base_init()
for that case.
Fix this by calling that funcion if amdgpu_discovery == 0 in addition to
the case that amdgpu_discovery_reg_base_init() failed.
Fixes: c1cf79ca5ced46 ("drm/amdgpu: use IP discovery table for renoir")
Signed-off-by: Dirk Gouders <dirk@gouders.net>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Cc: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform driver fixes from Andy Shevchenko:
"We have some fixes for Tablet Mode reporting in particular, that users
are complaining a lot about.
Summary:
- Attempt #3 of enabling Tablet Mode reporting w/o regressions
- Improve battery recognition code in ASUS WMI driver
- Fix Kconfig dependency warning for Fujitsu and LG laptop drivers
- Add fixes in Thinkpad ACPI driver for _BCL method and NVRAM polling
- Fix power supply extended topology in Mellanox driver
- Fix memory leak in OLPC EC driver
- Avoid static struct device in Intel PMC core driver
- Add support for the touchscreen found in MPMAN Converter9 2-in-1
- Update MAINTAINERS to reflect the real state of affairs"
* tag 'platform-drivers-x86-v5.9-2' of git://git.infradead.org/linux-platform-drivers-x86:
platform/x86: thinkpad_acpi: re-initialize ACPI buffer size when reuse
MAINTAINERS: Add Mark Gross and Hans de Goede as x86 platform drivers maintainers
platform/x86: intel-vbtn: Switch to an allow-list for SW_TABLET_MODE reporting
platform/x86: intel-vbtn: Revert "Fix SW_TABLET_MODE always reporting 1 on the HP Pavilion 11 x360"
platform/x86: intel_pmc_core: do not create a static struct device
platform/x86: mlx-platform: Fix extended topology configuration for power supply units
platform/x86: pcengines-apuv2: Fix typo on define of AMD_FCH_GPIO_REG_GPIO55_DEVSLP0
platform/x86: fix kconfig dependency warning for FUJITSU_LAPTOP
platform/x86: fix kconfig dependency warning for LG_LAPTOP
platform/x86: thinkpad_acpi: initialize tp_nvram_state variable
platform/x86: intel-vbtn: Fix SW_TABLET_MODE always reporting 1 on the HP Pavilion 11 x360
platform/x86: asus-wmi: Add BATC battery name to the list of supported
platform/x86: asus-nb-wmi: Revert "Do not load on Asus T100TA and T200TA"
platform/x86: touchscreen_dmi: Add info for the MPMAN Converter9 2-in-1
Documentation: laptops: thinkpad-acpi: fix underline length build warning
Platform: OLPC: Fix memleak in olpc_ec_probe
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If both LED banks aren't used in device tree, an out-of-bounds
condition in lm3697_init occurs because of the for loop assuming that
all the banks are used. Fix it by adding a variable that contains the
number of used banks.
Signed-off-by: Gabriel David <ultracoolguy@tutanota.com>
[removed extra rename, minor tweaks]
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Cc: stable@kernel.org
|
|
On an error exit path, a negative error code should be returned
instead of a positive return value.
Fixes: 90b2d4f15ff7 ("ipmi_si: Remove hacks for adding a dummy platform devices")
Cc: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Message-Id: <20201005145212.84435-1-tianjia.zhang@linux.alibaba.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
|
|
Pull networking fixes from David Miller:
1) Make sure SKB control block is in the proper state during IPSEC
ESP-in-TCP encapsulation. From Sabrina Dubroca.
2) Various kinds of attributes were not being cloned properly when we
build new xfrm_state objects from existing ones. Fix from Antony
Antony.
3) Make sure to keep BTF sections, from Tony Ambardar.
4) TX DMA channels need proper locking in lantiq driver, from Hauke
Mehrtens.
5) Honour route MTU during forwarding, always. From Maciej
Żenczykowski.
6) Fix races in kTLS which can result in crashes, from Rohit
Maheshwari.
7) Skip TCP DSACKs with rediculous sequence ranges, from Priyaranjan
Jha.
8) Use correct address family in xfrm state lookups, from Herbert Xu.
9) A bridge FDB flush should not clear out user managed fdb entries
with the ext_learn flag set, from Nikolay Aleksandrov.
10) Fix nested locking of netdev address lists, from Taehee Yoo.
11) Fix handling of 32-bit DATA_FIN values in mptcp, from Mat Martineau.
12) Fix r8169 data corruptions on RTL8402 chips, from Heiner Kallweit.
13) Don't free command entries in mlx5 while comp handler could still be
running, from Eran Ben Elisha.
14) Error flow of request_irq() in mlx5 is busted, due to an off by one
we try to free and IRQ never allocated. From Maor Gottlieb.
15) Fix leak when dumping netlink policies, from Johannes Berg.
16) Sendpage cannot be performed when a page is a slab page, or the page
count is < 1. Some subsystems such as nvme were doing so. Create a
"sendpage_ok()" helper and use it as needed, from Coly Li.
17) Don't leak request socket when using syncookes with mptcp, from
Paolo Abeni.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (111 commits)
net/core: check length before updating Ethertype in skb_mpls_{push,pop}
net: mvneta: fix double free of txq->buf
net_sched: check error pointer in tcf_dump_walker()
net: team: fix memory leak in __team_options_register
net: typhoon: Fix a typo Typoon --> Typhoon
net: hinic: fix DEVLINK build errors
net: stmmac: Modify configuration method of EEE timers
tcp: fix syn cookied MPTCP request socket leak
libceph: use sendpage_ok() in ceph_tcp_sendpage()
scsi: libiscsi: use sendpage_ok() in iscsi_tcp_segment_map()
drbd: code cleanup by using sendpage_ok() to check page for kernel_sendpage()
tcp: use sendpage_ok() to detect misused .sendpage
nvme-tcp: check page by sendpage_ok() before calling kernel_sendpage()
net: add WARN_ONCE in kernel_sendpage() for improper zero-copy send
net: introduce helper sendpage_ok() in include/linux/net.h
net: usb: pegasus: Proper error handing when setting pegasus' MAC address
net: core: document two new elements of struct net_device
netlink: fix policy dump leak
net/mlx5e: Fix race condition on nhe->n pointer in neigh update
net/mlx5e: Fix VLAN create flow
...
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