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Panel does not have children with unit-addresses thus address/size-cells
are not valid:
sdm845-xiaomi-beryllium-tianma.dtb: panel@0: Unevaluated properties are not allowed ('#address-cells', '#size-cells' were unexpected)
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-10-krzysztof.kozlowski@linaro.org
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Panel does not have children with unit-addresses thus address/size-cells
are not valid:
panel@0: '#address-cells', '#size-cells' do not match any of the regexes: 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-9-krzysztof.kozlowski@linaro.org
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innolux,n116bca-ea1 is not exactly compatible witg innolux,n116bge, as
they have their own driver data. Bindings do not allow fallback:
sc7180-trogdor-lazor-limozeen-nots-r4.dtb: panel: compatible: ['innolux,n116bca-ea1', 'innolux,n116bge'] is too long
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-8-krzysztof.kozlowski@linaro.org
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The panel bindings expect to have only one port, thus they do not allow
to use "ports" node:
sc7280-herobrine-zombie-nvme-lte.dtb: panel: 'ports' does not match any of the regexes: 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-7-krzysztof.kozlowski@linaro.org
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The panel bindings expect to have only one port, thus they do not allow
to use "ports" node:
sc7180-trogdor-wormdingler-rev1-boe.dtb: panel@0: 'ports' does not match any of the regexes: 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-6-krzysztof.kozlowski@linaro.org
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The panel bindings expect to have only one port, thus they do not allow
to use "ports" node:
sc7180-trogdor-quackingstick-r0.dtb: panel@0: 'ports' does not match any of the regexes: 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-5-krzysztof.kozlowski@linaro.org
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The panel bindings expect to have only one port, thus they do not allow
to use "ports" node:
sc7180-idp.dtb: panel@0: 'ports' does not match any of the regexes: 'pinctrl-[0-9]+'
sc7180-idp.dtb: panel@0: 'port' is a required property
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-4-krzysztof.kozlowski@linaro.org
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The panel bindings expect to have only one port, thus they do not allow
to use "ports" node:
sc8280xp-crd.dtb: panel: 'ports' does not match any of the regexes: 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-3-krzysztof.kozlowski@linaro.org
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The panel bindings expect to have only one port, thus they do not allow
to use "ports" node:
sc8280xp-lenovo-thinkpad-x13s.dtb: panel: 'ports' does not match any of the regexes: 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-2-krzysztof.kozlowski@linaro.org
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The panel bindings expect to have only one port, thus they do not allow
to use "ports" node:
sdm845-cheza-r2.dtb: panel: 'ports' does not match any of the regexes: 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230326155753.92007-1-krzysztof.kozlowski@linaro.org
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The pmk8280 PMIC PON peripheral is gen3 and uses two sets of registers;
hlos and pbs.
This specifically fixes the following error message during boot when the
pbs registers are not defined:
PON_PBS address missing, can't read HW debounce time
Note that this also enables the spurious interrupt workaround introduced
by commit 0b65118e6ba3 ("Input: pm8941-pwrkey - add software key press
debouncing support") (which may or may not be needed).
Fixes: ccd3517faf18 ("arm64: dts: qcom: sc8280xp: Add reference device")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Steev Klimaszewski <steev@kali.org> #Thinkpad X13s
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230327122948.4323-1-johan+linaro@kernel.org
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The sc8280xp pin controller does not have a way to enable or disable the
input buffer so drop the unnecessary 'input-enable' property which is
about to be deprecated.
Link: https://lore.kernel.org/lkml/20230323102605.6.I291ce0ba2c6ea80b341659c4f75a567a76dd7ca6@changeid
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230327123243.4527-1-johan+linaro@kernel.org
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LOOP_CONFIGURE is, as far as I understand it, supposed to be a way to
combine LOOP_SET_FD and LOOP_SET_STATUS64 into a single syscall. When
using LOOP_SET_FD+LOOP_SET_STATUS64, a single uevent would be sent for
each partition found on the loop device after the second ioctl(), but
when using LOOP_CONFIGURE, no such uevent was being sent.
In the old setup, uevents are disabled for LOOP_SET_FD, but not for
LOOP_SET_STATUS64. This makes sense, as it prevents uevents being
sent for a partially configured device during LOOP_SET_FD - they're
only sent at the end of LOOP_SET_STATUS64. But for LOOP_CONFIGURE,
uevents were disabled for the entire operation, so that final
notification was never issued. To fix this, reduce the critical
section to exclude the loop_reread_partitions() call, which causes
the uevents to be issued, to after uevents are re-enabled, matching
the behaviour of the LOOP_SET_FD+LOOP_SET_STATUS64 combination.
I noticed this because Busybox's losetup program recently changed from
using LOOP_SET_FD+LOOP_SET_STATUS64 to LOOP_CONFIGURE, and this broke
my setup, for which I want a notification from the kernel any time a
new partition becomes available.
Signed-off-by: Alyssa Ross <hi@alyssa.is>
[hch: reduced the critical section]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Fixes: 3448914e8cc5 ("loop: Add LOOP_CONFIGURE ioctl")
Link: https://lore.kernel.org/r/20230320125430.55367-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Pull kvm fixes from Paolo Bonzini:
"RISC-V:
- Fix VM hang in case of timer delta being zero
ARM:
- MMU fixes:
- Read the MMU notifier seq before dropping the mmap lock to guard
against reading a potentially stale VMA
- Disable interrupts when walking user page tables to protect
against the page table being freed
- Read the MTE permissions for the VMA within the mmap lock
critical section, avoiding the use of a potentally stale VMA
pointer
- vPMU fixes:
- Return the sum of the current perf event value and PMC snapshot
for reads from userspace
- Don't save the value of guest writes to PMCR_EL0.{C,P}, which
could otherwise lead to userspace erroneously resetting the vPMU
during VM save/restore"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
riscv/kvm: Fix VM hang in case of timer delta being zero.
KVM: arm64: Check for kvm_vma_mte_allowed in the critical section
KVM: arm64: Disable interrupts while walking userspace PTs
KVM: arm64: Retry fault if vma_lookup() results become invalid
KVM: arm64: PMU: Don't save PMCR_EL0.{C,P} for the vCPU
KVM: arm64: PMU: Fix GET_ONE_REG for vPMC regs to return the current value
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This commit adds an srcu_lockdep.sh script that checks whether lockdep
correctly classifies SRCU-based, SRCU/mutex-based, and SRCU/rwsem-based
deadlocks.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
[ boqun: Fix "RCUTORTURE" with "$RCUTORTURE" ]
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
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Add a test number 3 that creates deadlock cycles involving one RCU
Tasks Trace step and L-1 SRCU steps. Please note that lockdep will not
detect these deadlocks until synchronize_rcu_tasks_trace() is marked
with lockdep's new "sync" annotation, which will probably not happen
until some time after these markings prove their worth on SRCU.
Please note that these tests are available only in kernels built with
CONFIG_TASKS_TRACE_RCU=y.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
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In order to test the new SRCU-lockdep functionality, this commit adds
an rcutorture.test_srcu_lockdep module parameter that, when non-zero,
selects an SRCU deadlock scenario to execute. This parameter is a
five-digit number formatted as DNNL, where "D" is 1 to force a deadlock
and 0 to avoid doing so; "NN" is the test number, 0 for SRCU-based, 1
for SRCU/mutex-based, and 2 for SRCU/rwsem-based; and "L" is the number
of steps in the deadlock cycle.
Note that rcutorture.test_srcu_lockdep=1 will also force a hard hang.
If a non-zero value of rcutorture.test_srcu_lockdep does not select a
deadlock scenario, a console message is printed and testing continues.
[ paulmck: Apply kernel test robot feedback, add rwsem support. ]
[ paulmck: Apply Dan Carpenter feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
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Lock scenario print is always a weak spot of lockdep splats. Improvement
can be made if we rework the dependency search and the error printing.
However without touching the graph search, we can improve a little for
the circular deadlock case, since we have the to-be-added lock
dependency, and know whether these two locks are read/write/sync.
In order to know whether a held_lock is sync or not, a bit was
"stolen" from ->references, which reduce our limit for the same lock
class nesting from 2^12 to 2^11, and it should still be good enough.
Besides, since we now have bit in held_lock for sync, we don't need the
"hardirqoffs being 1" trick, and also we can avoid the __lock_release()
if we jump out of __lock_acquire() before the held_lock stored.
With these changes, a deadlock case evolved with read lock and sync gets
a better print-out from:
[...] Possible unsafe locking scenario:
[...]
[...] CPU0 CPU1
[...] ---- ----
[...] lock(srcuA);
[...] lock(srcuB);
[...] lock(srcuA);
[...] lock(srcuB);
to
[...] Possible unsafe locking scenario:
[...]
[...] CPU0 CPU1
[...] ---- ----
[...] rlock(srcuA);
[...] lock(srcuB);
[...] lock(srcuA);
[...] sync(srcuB);
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
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The stress test in test_ww_mutex_init() uses 4095 locks since
lockdep::reference has 12 bits, and since we are going to reduce it to
11 bits to support lock_sync(), and 2047 is still a reasonable number of
the max nesting level for locks, so adjust the test.
Reported-by: kernel test robot <oliver.sang@intel.com>
Link: https://lore.kernel.org/oe-lkp/202302011445.9d99dae2-oliver.sang@intel.com
Tested-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
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Although all flavors of RCU readers are annotated correctly with
lockdep as recursive read locks, they do not set the lock_acquire
'check' parameter. This means that RCU read locks are not added to
the lockdep dependency graph, which in turn means that lockdep cannot
detect RCU-based deadlocks. This is not a problem for RCU flavors having
atomic read-side critical sections because context-based annotations can
catch these deadlocks, see for example the RCU_LOCKDEP_WARN() statement
in synchronize_rcu(). But context-based annotations are not helpful
for sleepable RCU, especially given that it is perfectly legal to do
synchronize_srcu(&srcu1) within an srcu_read_lock(&srcu2).
However, we can detect SRCU-based by: (1) Making srcu_read_lock() a
'check'ed recursive read lock and (2) Making synchronize_srcu() a empty
write lock critical section. Even better, with the newly introduced
lock_sync(), we can avoid false positives about irq-unsafe/safe.
This commit therefore makes it so.
Note that NMI-safe SRCU read side critical sections are currently not
annotated, but might be annotated in the future.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
[ boqun: Add comments for annotation per Waiman's suggestion ]
[ boqun: Fix comment warning reported by Stephen Rothwell ]
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
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Currently, functions like synchronize_srcu() do not have lockdep
annotations resembling those of other write-side locking primitives.
Such annotations might look as follows:
lock_acquire();
lock_release();
Such annotations would tell lockdep that synchronize_srcu() acts like
an empty critical section that waits for other (read-side) critical
sections to finish. This would definitely catch some deadlock, but
as pointed out by Paul Mckenney [1], this could also introduce false
positives because of irq-safe/unsafe detection. Of course, there are
tricks could help with this:
might_sleep(); // Existing statement in __synchronize_srcu().
if (IS_ENABLED(CONFIG_PROVE_LOCKING)) {
local_irq_disable();
lock_acquire();
lock_release();
local_irq_enable();
}
But it would be better for lockdep to provide a separate annonation for
functions like synchronize_srcu(), so that people won't need to repeat
the ugly tricks above.
Therefore introduce lock_sync(), which is simply an lock+unlock
pair with no irq safe/unsafe deadlock check. This works because the
to-be-annontated functions do not create real critical sections, and
there is therefore no way that irq can create extra dependencies.
[1]: https://lore.kernel.org/lkml/20180412021233.ewncg5jjuzjw3x62@tardis/
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
[ boqun: Fix typos reported by Davidlohr Bueso and Paul E. Mckenney ]
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
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For ACPI drivers that provide a ->notify() callback and set
ACPI_DRIVER_ALL_NOTIFY_EVENTS in their flags, that callback can be
invoked while either the ->add() or the ->remove() callback is running
without any synchronization at the bus type level which is counter to
the common-sense expectation that notification handling should only be
enabled when the driver is actually bound to the device. As a result,
if the driver is not careful enough, it's ->notify() callback may crash
when it is invoked too early or too late [1].
This issue has been amplified by commit d6fb6ee1820c ("ACPI: bus: Drop
driver member of struct acpi_device") that made acpi_bus_notify() check
for the presence of the driver and its ->notify() callback directly
instead of using an extra driver pointer that was only set and cleared
by the bus type code, but it was present before that commit although
it was harder to reproduce then.
It can be addressed by using the observation that
acpi_device_install_notify_handler() can be modified to install the
handler for all types of events when ACPI_DRIVER_ALL_NOTIFY_EVENTS is
set in the driver flags, in which case acpi_bus_notify() will not need
to invoke the driver's ->notify() callback any more and that callback
will only be invoked after acpi_device_install_notify_handler() has run
and before acpi_device_remove_notify_handler() runs, which implies the
correct ordering with respect to the other ACPI driver callbacks.
Modify the code accordingly and while at it, drop two redundant local
variables from acpi_bus_notify() and turn its description comment into
a proper kerneldoc one.
Fixes: d6fb6ee1820c ("ACPI: bus: Drop driver member of struct acpi_device")
Link: https://lore.kernel.org/linux-acpi/9f6cba7a8a57e5a687c934e8e406e28c.squirrel@mail.panix.com # [1]
Reported-by: Pierre Asselin <pa@panix.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Pierre Asselin <pa@panix.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
Pull x86 platform driver fixes from Hans de Goede:
- Intel tpmi/vsec fixes
- think-lmi fixes
- two other small fixes / hw-id additions
* tag 'platform-drivers-x86-v6.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
platform/surface: aggregator: Add missing fwnode_handle_put()
platform/x86: think-lmi: Add possible_values for ThinkStation
platform/x86: think-lmi: only display possible_values if available
platform/x86: think-lmi: use correct possible_values delimiters
platform/x86: think-lmi: add missing type attribute
platform/x86 (gigabyte-wmi): Add support for A320M-S2H V2
platform/x86/intel: tpmi: Revise the comment of intel_vsec_add_aux
platform/x86/intel: tpmi: Fix double free in tpmi_create_device()
platform/x86/intel: vsec: Fix a memory leak in intel_vsec_add_aux
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git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
Pull MTD fixes from Miquel Raynal:
"Raw NAND controller driver fixes:
- meson:
- Invalidate cache on polling ECC bit
- Initialize struct with zeroes
- nandsim: Artificially prevent sequential page reads
ECC engine driver fixes:
- mxic-ecc: Fix mxic_ecc_data_xfer_wait_for_completion() when irq is
used
Binging fixes:
- jedec,spi-nor: Document CPOL/CPHA support"
* tag 'mtd/fixes-for-6.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
mtd: rawnand: meson: invalidate cache on polling ECC bit
mtd: rawnand: nandsim: Artificially prevent sequential page reads
dt-bindings: mtd: jedec,spi-nor: Document CPOL/CPHA support
mtd: nand: mxic-ecc: Fix mxic_ecc_data_xfer_wait_for_completion() when irq is used
mtd: rawnand: meson: initialize struct with zeroes
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To be able to compile the driver on all STM32MP SOCs, we move the
"depends on" on ARCH_STM32.
Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com>
Link: https://lore.kernel.org/r/20230324155105.826063-2-christophe.kerello@foss.st.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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Commit "perf/amlogic: resolve conflict between canvas & pmu"
changed the base address.
Fixes: 2016e2113d35 ("perf/amlogic: Add support for Amlogic meson G12 SoC DDR PMU driver")
Signed-off-by: Marc Gonzalez <mgonzalez@freebox.fr>
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230327120932.2158389-4-mgonzalez@freebox.fr
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
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Commit 21b56c847753 ("iov_iter: get rid of separate bvec and xarray
callbacks") removed the calls to memcpy_page_flushcache().
Remove the unnecessary memcpy_page_flushcache() call.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "Dan Williams" <dan.j.williams@intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20221230-kmap-x86-v1-3-15f1ecccab50@intel.com
Signed-off-by: Will Deacon <will@kernel.org>
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Return -EFAULT if put_user() for the PTRACE_GET_LAST_BREAK
request fails, instead of silently ignoring it.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Expolines depend on scripts/basic/fixdep. And build of expolines can now
race with the fixdep build:
make[1]: *** Deleting file 'arch/s390/lib/expoline/expoline.o'
/bin/sh: line 1: scripts/basic/fixdep: Permission denied
make[1]: *** [../scripts/Makefile.build:385: arch/s390/lib/expoline/expoline.o] Error 126
make: *** [../arch/s390/Makefile:166: expoline_prepare] Error 2
The dependence was removed in the below Fixes: commit. So reintroduce
the dependence on scripts.
Fixes: a0b0987a7811 ("s390/nospec: remove unneeded header includes")
Cc: Joe Lawrence <joe.lawrence@redhat.com>
Cc: stable@vger.kernel.org
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: linux-s390@vger.kernel.org
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230316112809.7903-1-jirislaby@kernel.org
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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The device release callback function invoked to release the matrix device
uses the dev_get_drvdata(device *dev) function to retrieve the
pointer to the vfio_matrix_dev object in order to free its storage. The
problem is, this object is not stored as drvdata with the device; since the
kfree function will accept a NULL pointer, the memory for the
vfio_matrix_dev object is never freed.
Since the device being released is contained within the vfio_matrix_dev
object, the container_of macro will be used to retrieve its pointer.
Fixes: 1fde573413b5 ("s390: vfio-ap: base implementation of VFIO AP device driver")
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Link: https://lore.kernel.org/r/20230320150447.34557-1-akrowiak@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Add missing earlyclobber annotation to size, to, and tmp2 operands of the
__clear_user() inline assembly since they are modified or written to before
the last usage of all input operands. This can lead to incorrect register
allocation for the inline assembly.
Fixes: 6c2a9e6df604 ("[S390] Use alternative user-copy operations for new hardware.")
Reported-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/all/20230321122514.1743889-3-mark.rutland@arm.com/
Cc: stable@vger.kernel.org
Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Kfence only needs its pool to be mapped as page granularity, if it is
inited early. Previous judgement was a bit over protected. From [1], Mark
suggested to "just map the KFENCE region a page granularity". So I
decouple it from judgement and do page granularity mapping for kfence
pool only. Need to be noticed that late init of kfence pool still requires
page granularity mapping.
Page granularity mapping in theory cost more(2M per 1GB) memory on arm64
platform. Like what I've tested on QEMU(emulated 1GB RAM) with
gki_defconfig, also turning off rodata protection:
Before:
[root@liebao ]# cat /proc/meminfo
MemTotal: 999484 kB
After:
[root@liebao ]# cat /proc/meminfo
MemTotal: 1001480 kB
To implement this, also relocate the kfence pool allocation before the
linear mapping setting up, arm64_kfence_alloc_pool is to allocate phys
addr, __kfence_pool is to be set after linear mapping set up.
LINK: [1] https://lore.kernel.org/linux-arm-kernel/Y+IsdrvDNILA59UN@FVFF77S0Q05N/
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Zhenhua Huang <quic_zhenhuah@quicinc.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/1679066974-690-1-git-send-email-quic_zhenhuah@quicinc.com
Signed-off-by: Will Deacon <will@kernel.org>
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The PMU itself is compatible with the one found on M1. We still know
next to nothing about the counters so keep using CPU uarch specific
compatibles/PMU names.
Signed-off-by: Janne Grunau <j@jannau.net>
Acked-by: Mark Rutland <mark.rutland@arm.com.
Reviewed-by: Hector Martin <marcan@marcan.st>
Link: https://lore.kernel.org/r/20230214-apple_m2_pmu-v1-2-9c9213ab9b63@jannau.net
Signed-off-by: Will Deacon <will@kernel.org>
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The PMUs on the Apple M2 cores avalanche and blizzard CPU are compatible
with M1 ones. As on M1 we don't know exactly what the counters count so
use a distinct compatible for each micro-architecture.
Apple's PMU counter description omits a counter for M2 so there
is some variation on the interpretation of the counters.
Signed-off-by: Janne Grunau <j@jannau.net>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Hector Martin <marcan@marcan.st>
Link: https://lore.kernel.org/r/20230214-apple_m2_pmu-v1-1-9c9213ab9b63@jannau.net
Signed-off-by: Will Deacon <will@kernel.org>
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Don't report an error code to L1 when synthesizing a nested VM-Exit and
L2 is in Real Mode. Per Intel's SDM, regarding the error code valid bit:
This bit is always 0 if the VM exit occurred while the logical processor
was in real-address mode (CR0.PE=0).
The bug was introduced by a recent fix for AMD's Paged Real Mode, which
moved the error code suppression from the common "queue exception" path
to the "inject exception" path, but missed VMX's "synthesize VM-Exit"
path.
Fixes: b97f07458373 ("KVM: x86: determine if an exception has an error code only when injecting it.")
Cc: stable@vger.kernel.org
Cc: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230322143300.2209476-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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When injecting an exception into a vCPU in Real Mode, suppress the error
code by clearing the flag that tracks whether the error code is valid, not
by clearing the error code itself. The "typo" was introduced by recent
fix for SVM's funky Paged Real Mode.
Opportunistically hoist the logic above the tracepoint so that the trace
is coherent with respect to what is actually injected (this was also the
behavior prior to the buggy commit).
Fixes: b97f07458373 ("KVM: x86: determine if an exception has an error code only when injecting it.")
Cc: stable@vger.kernel.org
Cc: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230322143300.2209476-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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According to S905X2 Datasheet - Revision 07:
DMC_MON area spans 0xff638080-0xff6380c0
DDR_PLL area spans 0xff638c00-0xff638c34
Round DDR_PLL area size up to 0x40
Fixes: 90cf8e21016fa3 ("arm64: dts: meson: Add DDR PMU node")
Signed-off-by: Marc Gonzalez <mgonzalez@freebox.fr>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230327120932.2158389-3-mgonzalez@freebox.fr
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
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Clear vcpu->mmio_needed when injecting an exception from the emulator to
squash a (legitimate) warning about vcpu->mmio_needed being true at the
start of KVM_RUN without a callback being registered to complete the
userspace MMIO exit. Suppressing the MMIO write exit is inarguably wrong
from an architectural perspective, but it is the least awful hack-a-fix
due to shortcomings in KVM's uAPI, not to mention that KVM already
suppresses MMIO writes in this scenario.
Outside of REP string instructions, KVM doesn't provide a way to resume
an instruction at the exact point where it was "interrupted" if said
instruction partially completed before encountering an MMIO access. For
MMIO reads, KVM immediately exits to userspace upon detecting MMIO as
userspace provides the to-be-read value in a buffer, and so KVM can safely
(more or less) restart the instruction from the beginning. When the
emulator re-encounters the MMIO read, KVM will service the MMIO by getting
the value from the buffer instead of exiting to userspace, i.e. KVM won't
put the vCPU into an infinite loop.
On an emulated MMIO write, KVM finishes the instruction before exiting to
userspace, as exiting immediately would ultimately hang the vCPU due to
the aforementioned shortcoming of KVM not being able to resume emulation
in the middle of an instruction.
For the vast majority of _emulated_ instructions, deferring the userspace
exit doesn't cause problems as very few x86 instructions (again ignoring
string operations) generate multiple writes. But for instructions that
generate multiple writes, e.g. PUSHA (multiple pushes onto the stack),
deferring the exit effectively results in only the final write triggering
an exit to userspace. KVM does support multiple MMIO "fragments", but
only for page splits; if an instruction performs multiple distinct MMIO
writes, the number of fragments gets reset when the next MMIO write comes
along and any previous MMIO writes are dropped.
Circling back to the warning, if a deferred MMIO write coincides with an
exception, e.g. in this case a #SS due to PUSHA underflowing the stack
after queueing a write to an MMIO page on a previous push, KVM injects
the exceptions and leaves the deferred MMIO pending without registering a
callback, thus triggering the splat.
Sweep the problem under the proverbial rug as dropping MMIO writes is not
unique to the exception scenario (see above), i.e. instructions like PUSHA
are fundamentally broken with respect to MMIO, and have been since KVM's
inception.
Reported-by: zhangjianguo <zhangjianguo18@huawei.com>
Reported-by: syzbot+760a73552f47a8cd0fd9@syzkaller.appspotmail.com
Reported-by: syzbot+8accb43ddc6bd1f5713a@syzkaller.appspotmail.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230322141220.2206241-1-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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According to S905X2 Datasheet - Revision 07:
DRAM Memory Controller (DMC) register area spans ff638000-ff63a000.
According to DeviceTree Specification - Release v0.4-rc1:
simple-bus nodes do not require reg property.
Fixes: 1499218c80c99a ("arm64: dts: move common G12A & G12B modes to meson-g12-common.dtsi")
Signed-off-by: Marc Gonzalez <mgonzalez@freebox.fr>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20230327120932.2158389-2-mgonzalez@freebox.fr
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
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KVM irqfd based emulation of level-triggered interrupts doesn't work
quite correctly in some cases, particularly in the case of interrupts
that are handled in a Linux guest as oneshot interrupts (IRQF_ONESHOT).
Such an interrupt is acked to the device in its threaded irq handler,
i.e. later than it is acked to the interrupt controller (EOI at the end
of hardirq), not earlier.
Linux keeps such interrupt masked until its threaded handler finishes,
to prevent the EOI from re-asserting an unacknowledged interrupt.
However, with KVM + vfio (or whatever is listening on the resamplefd)
we always notify resamplefd at the EOI, so vfio prematurely unmasks the
host physical IRQ, thus a new physical interrupt is fired in the host.
This extra interrupt in the host is not a problem per se. The problem is
that it is unconditionally queued for injection into the guest, so the
guest sees an extra bogus interrupt. [*]
There are observed at least 2 user-visible issues caused by those
extra erroneous interrupts for a oneshot irq in the guest:
1. System suspend aborted due to a pending wakeup interrupt from
ChromeOS EC (drivers/platform/chrome/cros_ec.c).
2. Annoying "invalid report id data" errors from ELAN0000 touchpad
(drivers/input/mouse/elan_i2c_core.c), flooding the guest dmesg
every time the touchpad is touched.
The core issue here is that by the time when the guest unmasks the IRQ,
the physical IRQ line is no longer asserted (since the guest has
acked the interrupt to the device in the meantime), yet we
unconditionally inject the interrupt queued into the guest by the
previous resampling. So to fix the issue, we need a way to detect that
the IRQ is no longer pending, and cancel the queued interrupt in this
case.
With IOAPIC we are not able to probe the physical IRQ line state
directly (at least not if the underlying physical interrupt controller
is an IOAPIC too), so in this patch we use irqfd resampler for that.
Namely, instead of injecting the queued interrupt, we just notify the
resampler that this interrupt is done. If the IRQ line is actually
already deasserted, we are done. If it is still asserted, a new
interrupt will be shortly triggered through irqfd and injected into the
guest.
In the case if there is no irqfd resampler registered for this IRQ, we
cannot fix the issue, so we keep the existing behavior: immediately
unconditionally inject the queued interrupt.
This patch fixes the issue for x86 IOAPIC only. In the long run, we can
fix it for other irqchips and other architectures too, possibly taking
advantage of reading the physical state of the IRQ line, which is
possible with some other irqchips (e.g. with arm64 GIC, maybe even with
the legacy x86 PIC).
[*] In this description we assume that the interrupt is a physical host
interrupt forwarded to the guest e.g. by vfio. Potentially the same
issue may occur also with a purely virtual interrupt from an
emulated device, e.g. if the guest handles this interrupt, again, as
a oneshot interrupt.
Signed-off-by: Dmytro Maluka <dmy@semihalf.com>
Link: https://lore.kernel.org/kvm/31420943-8c5f-125c-a5ee-d2fde2700083@semihalf.com/
Link: https://lore.kernel.org/lkml/87o7wrug0w.wl-maz@kernel.org/
Message-Id: <20230322204344.50138-3-dmy@semihalf.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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It is useful to be able to do read-only traversal of the list of all the
registered irqfd resamplers without locking the resampler_lock mutex.
In particular, we are going to traverse it to search for a resampler
registered for the given irq of an irqchip, and that will be done with
an irqchip spinlock (ioapic->lock) held, so it is undesirable to lock a
mutex in this context. So turn this list into an RCU list.
For protecting the read side, reuse kvm->irq_srcu which is already used
for protecting a number of irq related things (kvm->irq_routing,
irqfd->resampler->list, kvm->irq_ack_notifier_list,
kvm->arch.mask_notifier_list).
Signed-off-by: Dmytro Maluka <dmy@semihalf.com>
Message-Id: <20230322204344.50138-2-dmy@semihalf.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Fix warning message from smatch tool:
| smatch warnings:
| drivers/perf/arm_cspmu/arm_cspmu.c:1075 arm_cspmu_find_cpu_container()
| warn: variable dereferenced before check 'cpu_dev' (see line 1073)
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/202302191227.kc0V8fM7-lkp@intel.com/
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20230302205701.35323-1-bwicaksono@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
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The 3th argument of for_each_set_bit is incorrect, fix them.
Fixes: 2016e2113d35 ("perf/amlogic: Add support for Amlogic meson G12 SoC DDR PMU driver")
Signed-off-by: Jiucheng Xu <jiucheng.xu@amlogic.com>
Link: https://lore.kernel.org/r/20230209115403.521868-1-jiucheng.xu@amlogic.com
Signed-off-by: Will Deacon <will@kernel.org>
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The Hyper-V "EnlightenedNptTlb" enlightenment is always enabled when KVM
is running on top of Hyper-V and Hyper-V exposes support for it (which
is always). On AMD CPUs this enlightenment results in ASID invalidations
not flushing TLB entries derived from the NPT. To force the underlying
(L0) hypervisor to rebuild its shadow page tables, an explicit hypercall
is needed.
The original KVM implementation of Hyper-V's "EnlightenedNptTlb" on SVM
only added remote TLB flush hooks. This worked out fine for a while, as
sufficient remote TLB flushes where being issued in KVM to mask the
problem. Since v5.17, changes in the TDP code reduced the number of
flushes and the out-of-sync TLB prevents guests from booting
successfully.
Split svm_flush_tlb_current() into separate callbacks for the 3 cases
(guest/all/current), and issue the required Hyper-V hypercall when a
Hyper-V TLB flush is needed. The most important case where the TLB flush
was missing is when loading a new PGD, which is followed by what is now
svm_flush_tlb_current().
Cc: stable@vger.kernel.org # v5.17+
Fixes: 1e0c7d40758b ("KVM: SVM: hyper-v: Remote TLB flush for SVM")
Link: https://lore.kernel.org/lkml/43980946-7bbf-dcef-7e40-af904c456250@linux.microsoft.com/
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Jeremi Piotrowski <jpiotrowski@linux.microsoft.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20230324145233.4585-1-jpiotrowski@linux.microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Convert platform_get_resource(), devm_ioremap_resource() to a single
call to devm_platform_get_and_ioremap_resource(), as this is exactly
what this function does.
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Reviewed-by: Shuai Xue <xueshuai@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230216063403.9753-1-yang.lee@linux.alibaba.com
Signed-off-by: Will Deacon <will@kernel.org>
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Since commit 8b41fc4454e ("kbuild: create modules.builtin without
Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations
are used to identify modules. As a consequence, uses of the macro
in non-modules will cause modprobe to misidentify their containing
object file as a module when it is not (false positives), and modprobe
might succeed rather than failing with a suitable error message.
So remove it in the files in this commit, none of which can be built as
modules.
Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Suggested-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: linux-modules@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Hitomi Hasegawa <hasegawa-hitomi@fujitsu.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230217141059.392471-9-nick.alcock@oracle.com
Signed-off-by: Will Deacon <will@kernel.org>
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HEAD
KVM/riscv fixes for 6.3, take #1
- Fix VM hang in case of timer delta being zero
|
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git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 6.3, part #2
Fixes for a rather interesting set of bugs relating to the MMU:
- Read the MMU notifier seq before dropping the mmap lock to guard
against reading a potentially stale VMA
- Disable interrupts when walking user page tables to protect against
the page table being freed
- Read the MTE permissions for the VMA within the mmap lock critical
section, avoiding the use of a potentally stale VMA pointer
Additionally, some fixes targeting the vPMU:
- Return the sum of the current perf event value and PMC snapshot for
reads from userspace
- Don't save the value of guest writes to PMCR_EL0.{C,P}, which could
otherwise lead to userspace erroneously resetting the vPMU during VM
save/restore
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According to commit 890cc39a8799 ("drivers: provide
devm_platform_get_and_ioremap_resource()"), convert
platform_get_resource(), devm_ioremap_resource() to a single
call to devm_platform_get_and_ioremap_resource(), as this is exactly
what this function does.
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230315023108.36953-1-yang.lee@linux.alibaba.com
Signed-off-by: Will Deacon <will@kernel.org>
|
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According to commit 890cc39a8799 ("drivers: provide
devm_platform_get_and_ioremap_resource()"), convert
platform_get_resource(), devm_ioremap_resource() to a single
call to devm_platform_get_and_ioremap_resource(), as this is exactly
what this function does.
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230315023017.35789-1-yang.lee@linux.alibaba.com
Signed-off-by: Will Deacon <will@kernel.org>
|
