The Nitro Enclaves PCI device is used by the kernel driver as a means of
communication with the hypervisor on the host where the primary VM and
the enclaves run. It handles requests with regard to enclave lifetime.
Setup the PCI device driver and add support for MSI-X interrupts.
Changelog
v9 -> v10
* Update commit message to include the changelog before the SoB tag(s).
v8 -> v9
* Init the reference to the ne_pci_dev in the ne_devs data structure.
v7 -> v8
* Add NE PCI driver shutdown logic.
v6 -> v7
* No changes.
v5 -> v6
* Update documentation to kernel-doc format.
v4 -> v5
* Remove sanity checks for situations that shouldn't happen, only if
buggy system or broken logic at all.
v3 -> v4
* Use dev_err instead of custom NE log pattern.
* Update NE PCI driver name to "nitro_enclaves".
v2 -> v3
* Remove the GPL additional wording as SPDX-License-Identifier is
already in place.
* Remove the WARN_ON calls.
* Remove linux/bug include that is not needed.
* Update static calls sanity checks.
* Remove "ratelimited" from the logs that are not in the ioctl call
paths.
* Update kzfree() calls to kfree().
v1 -> v2
* Add log pattern for NE.
* Update PCI device setup functions to receive PCI device data structure and
then get private data from it inside the functions logic.
* Remove the BUG_ON calls.
* Add teardown function for MSI-X setup.
* Update goto labels to match their purpose.
* Implement TODO for NE PCI device disable state check.
* Update function name for NE PCI device probe / remove.
Reviewed-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Alexandru-Catalin Vasile <lexnv@amazon.com>
Signed-off-by: Alexandru Ciobotaru <alcioa@amazon.com>
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Link: https://lore.kernel.org/r/20200921121732.44291-5-andraprs@amazon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The Nitro Enclaves driver keeps an internal info per each enclave.
This is needed to be able to manage enclave resources state, enclave
notifications and have a reference of the PCI device that handles
command requests for enclave lifetime management.
Changelog
v9 -> v10
* Update commit message to include the changelog before the SoB tag(s).
v8 -> v9
* Add data structure to keep references to both Nitro Enclaves misc and
PCI devices.
v7 -> v8
* No changes.
v6 -> v7
* Update the naming and add more comments to make more clear the logic
of handling full CPU cores and dedicating them to the enclave.
v5 -> v6
* Update documentation to kernel-doc format.
* Include in the enclave memory region data structure the user space
address and size for duplicate user space memory regions checks.
v4 -> v5
* Include enclave cores field in the enclave metadata.
* Update the vCPU ids data structure to be a cpumask instead of a list.
v3 -> v4
* Add NUMA node field for an enclave metadata as the enclave memory and
CPUs need to be from the same NUMA node.
v2 -> v3
* Remove the GPL additional wording as SPDX-License-Identifier is
already in place.
v1 -> v2
* Add enclave memory regions and vcpus count for enclave bookkeeping.
* Update ne_state comments to reflect NE_START_ENCLAVE ioctl naming
update.
Reviewed-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Alexandru-Catalin Vasile <lexnv@amazon.com>
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Link: https://lore.kernel.org/r/20200921121732.44291-4-andraprs@amazon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The Nitro Enclaves (NE) driver communicates with a new PCI device, that
is exposed to a virtual machine (VM) and handles commands meant for
handling enclaves lifetime e.g. creation, termination, setting memory
regions. The communication with the PCI device is handled using a MMIO
space and MSI-X interrupts.
This device communicates with the hypervisor on the host, where the VM
that spawned the enclave itself runs, e.g. to launch a VM that is used
for the enclave.
Define the MMIO space of the NE PCI device, the commands that are
provided by this device. Add an internal data structure used as private
data for the PCI device driver and the function for the PCI device
command requests handling.
Changelog
v9 -> v10
* Update commit message to include the changelog before the SoB tag(s).
v8 -> v9
* Fix indent for the NE PCI device command types enum.
v7 -> v8
* No changes.
v6 -> v7
* Update the documentation to include references to the NE PCI device id
and MMIO bar.
v5 -> v6
* Update documentation to kernel-doc format.
v4 -> v5
* Add a TODO for including flags in the request to the NE PCI device to
set a memory region for an enclave. It is not used for now.
v3 -> v4
* Remove the "packed" attribute and include padding in the NE data
structures.
v2 -> v3
* Remove the GPL additional wording as SPDX-License-Identifier is
already in place.
v1 -> v2
* Update path naming to drivers/virt/nitro_enclaves.
* Update NE_ENABLE_OFF / NE_ENABLE_ON defines.
Reviewed-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Alexandru-Catalin Vasile <lexnv@amazon.com>
Signed-off-by: Alexandru Ciobotaru <alcioa@amazon.com>
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Link: https://lore.kernel.org/r/20200921121732.44291-3-andraprs@amazon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The Nitro Enclaves driver handles the enclave lifetime management. This
includes enclave creation, termination and setting up its resources such
as memory and CPU.
An enclave runs alongside the VM that spawned it. It is abstracted as a
process running in the VM that launched it. The process interacts with
the NE driver, that exposes an ioctl interface for creating an enclave
and setting up its resources.
Changelog
v9 -> v10
* Update commit message to include the changelog before the SoB tag(s).
v8 -> v9
* No changes.
v7 -> v8
* Add NE custom error codes for user space memory regions not backed by
pages multiple of 2 MiB, invalid flags and enclave CID.
* Add max flag value for enclave image load info.
v6 -> v7
* Clarify in the ioctls documentation that the return value is -1 and
errno is set on failure.
* Update the error code value for NE_ERR_INVALID_MEM_REGION_SIZE as it
gets in user space as value 25 (ENOTTY) instead of 515. Update the
NE custom error codes values range to not be the same as the ones
defined in include/linux/errno.h, although these are not propagated
to user space.
v5 -> v6
* Fix typo in the description about the NE CPU pool.
* Update documentation to kernel-doc format.
* Remove the ioctl to query API version.
v4 -> v5
* Add more details about the ioctl calls usage e.g. error codes, file
descriptors used.
* Update the ioctl to set an enclave vCPU to not return a file
descriptor.
* Add specific NE error codes.
v3 -> v4
* Decouple NE ioctl interface from KVM API.
* Add NE API version and the corresponding ioctl call.
* Add enclave / image load flags options.
v2 -> v3
* Remove the GPL additional wording as SPDX-License-Identifier is
already in place.
v1 -> v2
* Add ioctl for getting enclave image load metadata.
* Update NE_ENCLAVE_START ioctl name to NE_START_ENCLAVE.
* Add entry in Documentation/userspace-api/ioctl/ioctl-number.rst for NE
ioctls.
* Update NE ioctls definition based on the updated ioctl range for major
and minor.
Reviewed-by: Alexander Graf <graf@amazon.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Alexandru Vasile <lexnv@amazon.com>
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Link: https://lore.kernel.org/r/20200921121732.44291-2-andraprs@amazon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
uio_register_device() do two things.
1) get an uio id from a global pool, e.g. the id is <A>
2) create file nodes like /sys/class/uio/uio<A>
uio_unregister_device() do two things.
1) free the uio id <A> and return it to the global pool
2) free the file node /sys/class/uio/uio<A>
There is a situation is that one worker is calling uio_unregister_device(),
and another worker is calling uio_register_device().
If the two workers are X and Y, they go as below sequence,
1) X free the uio id <AAA>
2) Y get an uio id <AAA>
3) Y create file node /sys/class/uio/uio<AAA>
4) X free the file note /sys/class/uio/uio<AAA>
Then it will failed at the 3rd step and cause the phenomenon we saw as it
is creating a duplicated file node.
Failure reports as follows:
sysfs: cannot create duplicate filename '/class/uio/uio10'
Call Trace:
sysfs_do_create_link_sd.isra.2+0x9e/0xb0
sysfs_create_link+0x25/0x40
device_add+0x2c4/0x640
__uio_register_device+0x1c5/0x576 [uio]
adf_uio_init_bundle_dev+0x231/0x280 [intel_qat]
adf_uio_register+0x1c0/0x340 [intel_qat]
adf_dev_start+0x202/0x370 [intel_qat]
adf_dev_start_async+0x40/0xa0 [intel_qat]
process_one_work+0x14d/0x410
worker_thread+0x4b/0x460
kthread+0x105/0x140
? process_one_work+0x410/0x410
? kthread_bind+0x40/0x40
ret_from_fork+0x1f/0x40
Code: 85 c0 48 89 c3 74 12 b9 00 10 00 00 48 89 c2 31 f6 4c 89 ef
e8 ec c4 ff ff 4c 89 e2 48 89 de 48 c7 c7 e8 b4 ee b4 e8 6a d4 d7
ff <0f> 0b 48 89 df e8 20 fa f3 ff 5b 41 5c 41 5d 5d c3 66 0f 1f 84
---[ end trace a7531c1ed5269e84 ]---
c6xxvf b002:00:00.0: Failed to register UIO devices
c6xxvf b002:00:00.0: Failed to register UIO devices
Signed-off-by: Lang Dai <lang.dai@intel.com>
Link: https://lore.kernel.org/r/1600054002-17722-1-git-send-email-lang.dai@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
of_parse_phandle() returns device_node with incremented ref count
which needs to be decremented by of_node_put() when device_node
is not used.
Fixes: e2a5402ec7 ("nvmem: Add nvmem_device based consumer apis.")
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200917134437.16637-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We don't need to specify any ranges when allocating IDs so we can switch
to ida_alloc() and ida_free() instead of the ida_simple_ counterparts.
ida_simple_get(ida, 0, 0, gfp) is equivalent to
ida_alloc_range(ida, 0, UINT_MAX, gfp) which is equivalent to
ida_alloc(ida, gfp). Note: IDR will never actually allocate an ID
larger than INT_MAX.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200917134437.16637-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Set type as NVMEM_TYPE_EEPROM to expose this info via
sysfs:
$ cat /sys/bus/nvmem/devices/{DEVICE}/type
EEPROM
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Link: https://lore.kernel.org/r/20200916170933.20302-4-vadym.kochan@plvision.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Set type as NVMEM_TYPE_EEPROM to expose this info via
sysfs:
$ cat /sys/bus/nvmem/devices/{DEVICE}/type
EEPROM
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Link: https://lore.kernel.org/r/20200916170933.20302-3-vadym.kochan@plvision.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The initialisation code checks TRCIDR4 to determine the number of resource
selectors available on the system. Since ETM v 4.3, the value 0 has a
different meaning. This patch takes into account this change.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
[Removed '.' in patch title, added stable]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-17-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The member @nr_resource represents how many resource selector pairs,
and the pair 0 is always implemented and reserved.
So let's multiply by 2 when resetting the selector configuration.
And also update the validation of the input @idx.
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: Jonathan Zhou <jonathan.zhouwen@huawei.com>
[Fixed typographical error in changelog, added stable]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-16-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Coresight driver assumes sink is common across all the ETMs,
and tries to build a path between ETM and the first enabled
sink found using bus based search. This breaks sysFS usage
on implementations that has multiple per core sinks in
enabled state.
To fix this, coresight_get_enabled_sink API is updated to
do a connection based search starting from the given source,
instead of bus based search.
With sink selection using sysfs depecrated for perf interface,
provision for reset is removed as well in this API.
Signed-off-by: Linu Cherian <lcherian@marvell.com>
[Fixed indentation problem and removed obsolete comment]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-15-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When using the perf interface, sink selection using sysfs is
deprecated.
Signed-off-by: Linu Cherian <lcherian@marvell.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-14-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add CoreSight mailing list so that people can participate in patch
reviews and know what features are coming next.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-13-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The TRCSEQEVR(3) is reserved, using '@nrseqstate - 1' instead to avoid
accessing the reserved register.
Fixes: f188b5e76a ("coresight: etm4x: Save/restore state across CPU low power states")
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: Jonathan Zhou <jonathan.zhouwen@huawei.com>
[Fixed capital letter in title]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-12-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If the specified/hinted sink is not reachable from a subset of the CPUs,
we could end up unable to trace the event on those CPUs. This
is the best effort we could do until we support 1:1 configurations.
Fail gracefully in such cases avoiding a WARN_ON, which can be easily
triggered by the user on certain platforms (Arm N1SDP), with the following
trace paths :
CPU0
\
-- Funnel0 --> ETF0 -->
/ \
CPU1 \
MainFunnel
CPU2 /
\ /
-- Funnel1 --> ETF1 -->
/
CPU1
$ perf record --per-thread -e cs_etm/@ETF0/u -- <app>
could trigger the following WARNING, when the event is scheduled
on CPU2.
[10919.513250] ------------[ cut here ]------------
[10919.517861] WARNING: CPU: 2 PID: 24021 at
drivers/hwtracing/coresight/coresight-etm-perf.c:316 etm_event_start+0xf8/0x100
...
[10919.564403] CPU: 2 PID: 24021 Comm: perf Not tainted 5.8.0+ #24
[10919.570308] pstate: 80400089 (Nzcv daIf +PAN -UAO BTYPE=--)
[10919.575865] pc : etm_event_start+0xf8/0x100
[10919.580034] lr : etm_event_start+0x80/0x100
[10919.584202] sp : fffffe001932f940
[10919.587502] x29: fffffe001932f940 x28: fffffc834995f800
[10919.592799] x27: 0000000000000000 x26: fffffe0011f3ced0
[10919.598095] x25: fffffc837fce244c x24: fffffc837fce2448
[10919.603391] x23: 0000000000000002 x22: fffffc8353529c00
[10919.608688] x21: fffffc835bb31000 x20: 0000000000000000
[10919.613984] x19: fffffc837fcdcc70 x18: 0000000000000000
[10919.619281] x17: 0000000000000000 x16: 0000000000000000
[10919.624577] x15: 0000000000000000 x14: 00000000000009f8
[10919.629874] x13: 00000000000009f8 x12: 0000000000000018
[10919.635170] x11: 0000000000000000 x10: 0000000000000000
[10919.640467] x9 : fffffe00108cd168 x8 : 0000000000000000
[10919.645763] x7 : 0000000000000020 x6 : 0000000000000001
[10919.651059] x5 : 0000000000000002 x4 : 0000000000000001
[10919.656356] x3 : 0000000000000000 x2 : 0000000000000000
[10919.661652] x1 : fffffe836eb40000 x0 : 0000000000000000
[10919.666949] Call trace:
[10919.669382] etm_event_start+0xf8/0x100
[10919.673203] etm_event_add+0x40/0x60
[10919.676765] event_sched_in.isra.134+0xcc/0x210
[10919.681281] merge_sched_in+0xb0/0x2a8
[10919.685017] visit_groups_merge.constprop.140+0x15c/0x4b8
[10919.690400] ctx_sched_in+0x15c/0x170
[10919.694048] perf_event_sched_in+0x6c/0xa0
[10919.698130] ctx_resched+0x60/0xa0
[10919.701517] perf_event_exec+0x288/0x2f0
[10919.705425] begin_new_exec+0x4c8/0xf58
[10919.709247] load_elf_binary+0x66c/0xf30
[10919.713155] exec_binprm+0x15c/0x450
[10919.716716] __do_execve_file+0x508/0x748
[10919.720711] __arm64_sys_execve+0x40/0x50
[10919.724707] do_el0_svc+0xf4/0x1b8
[10919.728095] el0_sync_handler+0xf8/0x124
[10919.732003] el0_sync+0x140/0x180
Even though we don't support using separate sinks for the ETMs yet (e.g,
for 1:1 configurations), we should at least honor the user's choice and
handle the limitations gracefully, by simply skipping the tracing on ETMs
which can't reach the requested sink.
Fixes: f9d81a657b ("coresight: perf: Allow tracing on hotplugged CPUs")
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Reported-by: Jeremy Linton <jeremy.linton@arm.com>
Tested-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-11-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Deadlock as below is triggered by one CPU holds drvdata->spinlock
and calls cti_enable_hw(). Smp_call_function_single() is called
in cti_enable_hw() and tries to let another CPU write CTI registers.
That CPU is trying to get drvdata->spinlock in cti_cpu_pm_notify()
and doesn't response to IPI from smp_call_function_single().
[ 988.335937] CPU: 6 PID: 10258 Comm: sh Tainted: G W L
5.8.0-rc6-mainline-16783-gc38daa79b26b-dirty #1
[ 988.346364] Hardware name: Thundercomm Dragonboard 845c (DT)
[ 988.352073] pstate: 20400005 (nzCv daif +PAN -UAO BTYPE=--)
[ 988.357689] pc : smp_call_function_single+0x158/0x1b8
[ 988.362782] lr : smp_call_function_single+0x124/0x1b8
...
[ 988.451638] Call trace:
[ 988.454119] smp_call_function_single+0x158/0x1b8
[ 988.458866] cti_enable+0xb4/0xf8 [coresight_cti]
[ 988.463618] coresight_control_assoc_ectdev+0x6c/0x128 [coresight]
[ 988.469855] coresight_enable+0x1f0/0x364 [coresight]
[ 988.474957] enable_source_store+0x5c/0x9c [coresight]
[ 988.480140] dev_attr_store+0x14/0x28
[ 988.483839] sysfs_kf_write+0x38/0x4c
[ 988.487532] kernfs_fop_write+0x1c0/0x2b0
[ 988.491585] vfs_write+0xfc/0x300
[ 988.494931] ksys_write+0x78/0xe0
[ 988.498283] __arm64_sys_write+0x18/0x20
[ 988.502240] el0_svc_common+0x98/0x160
[ 988.506024] do_el0_svc+0x78/0x80
[ 988.509377] el0_sync_handler+0xd4/0x270
[ 988.513337] el0_sync+0x164/0x180
This change write CTI registers directly in cti_enable_hw().
Config->hw_powered has been checked to be true with spinlock holded.
CTI is powered and can be programmed until spinlock is released.
Fixes: 6a0953ce7d ("coresight: cti: Add CPU idle pm notifer to CTI devices")
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
[Re-ordered variable declaration]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-10-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The member @nr_addr_cmp is not a bool value, using operator '>'
instead to avoid unexpected failure.
Fixes: a77de2637c ("coresight: etm4x: moving sysFS entries to a dedicated file")
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: Jonathan Zhou <jonathan.zhouwen@huawei.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-9-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Moving from using an address filter to trace the default "all addresses"
range to no filtering to acheive the same result, has caused the perf
filtering of kernel/user address spaces from not working unless an
explicit address filter was used.
This is due to the original code using a side-effect of the address
filtering rather than setting the global TRCVICTLR exception level
filtering.
The use of the mode sysfs file is also similarly affected.
A helper function is added to fix both instances.
Fixes: ae2041510d ("coresight: etmv4: Update default filter and initialisation")
Reported-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-8-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
STP_PACKET_MARKED is not supported by STM currently.
Add STM_FLAG_MARKED to support marked packet in STM.
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-3-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
etm4_count keeps track of number of ETMv4 registered and on some systems,
a race is observed on etm4_count variable which can lead to multiple calls
to cpuhp_setup_state_nocalls_cpuslocked(). This function internally calls
cpuhp_store_callbacks() which prevents multiple registrations of callbacks
for a given state and due to this race, it returns -EBUSY leading to ETM
probe failures like below.
coresight-etm4x: probe of 7040000.etm failed with error -16
This race can easily be triggered with async probe by setting probe type
as PROBE_PREFER_ASYNCHRONOUS and with ETM power management property
"arm,coresight-loses-context-with-cpu".
Prevent this race by moving cpuhp callbacks to etm driver init since the
cpuhp callbacks doesn't have to depend on the etm4_count and can be once
setup during driver init. Similarly we move cpu_pm notifier registration
to driver init and completely remove etm4_count usage. Also now we can
use non cpuslocked version of cpuhp callbacks with this movement.
Fixes: 9b6a3f3633 ("coresight: etmv4: Fix CPU power management setup in probe() function")
Fixes: 58eb457be0 ("hwtracing/coresight-etm4x: Convert to hotplug state machine")
Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-2-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
v4:
split power down flow and power saving function to two patch
v5:
fix up modified change under the --- line
Add rts522a L1 sub-state support
Save more power on rts5227 rts5249 rts525a rts5260
Fix rts5260 driving parameter
Signed-off-by: Ricky Wu <ricky_wu@realtek.com>
Link: https://lore.kernel.org/r/20200907100731.7722-1-ricky_wu@realtek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Initializing sensors requires attaching to pd 2. Add an ioctl for that.
This corresponds to FASTRPC_INIT_ATTACH_SENSORS in the downstream driver.
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Link: https://lore.kernel.org/r/20200908131013.19630-4-jonathan@marek.ca
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When mfd_add_devices() fail, pcr->slots should also be freed. However,
the current implementation does not free the member, leading to a memory
leak.
Fix this by adding a new goto label that frees pcr->slots.
Signed-off-by: Keita Suzuki <keitasuzuki.park@sslab.ics.keio.ac.jp>
Link: https://lore.kernel.org/r/20200909071853.4053-1-keitasuzuki.park@sslab.ics.keio.ac.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The pointer n is being initialized with a value that is
never read and it is being updated later with a new value. The
initialization is redundant and can be removed.
Acked-by: Todd Kjos <tkjos@google.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200910151221.751464-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently the return value from ret is uninitialized so the function
hisi_hikey_usb_parse_kirin970 is returning a garbage value when
succeeding. Since ret is not used anywhere else in the function, remove
it and just return 0 success at the end of the function.
Fixes: d210a00235 ("misc: hisi_hikey_usb: add support for Hikey 970")
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200914135646.99334-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Xilinx:
- Luca's changes clean up the xilinx-spi driver and add better
diagnostics on errors.
Core:
- I cleaned up a stray comment.
- Richard's change marks FPGA manager tasks un-interruptible.
- Tom has agreed to help out as Reviewer in the FPGA Manager subsystem.
DFL:
- Xu's changes add a new bus that is the first part of a series to support
adding devices via DFL (the other parts are still under review)
All patches have been reviewed on the mailing list, and have been in the
last few linux-next releases (as part of my for-next branch) without issues.
Signed-off-by: Moritz Fischer <mdf@kernel.org>
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Merge tag 'fpga-for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/mdf/linux-fpga into char-misc-next
Moritz writes:
Here is the first set of changes for the 5.10-rc1 merge window.
Xilinx:
- Luca's changes clean up the xilinx-spi driver and add better
diagnostics on errors.
Core:
- I cleaned up a stray comment.
- Richard's change marks FPGA manager tasks un-interruptible.
- Tom has agreed to help out as Reviewer in the FPGA Manager subsystem.
DFL:
- Xu's changes add a new bus that is the first part of a series to support
adding devices via DFL (the other parts are still under review)
All patches have been reviewed on the mailing list, and have been in the
last few linux-next releases (as part of my for-next branch) without issues.
Signed-off-by: Moritz Fischer <mdf@kernel.org>
* tag 'fpga-for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/mdf/linux-fpga:
fpga: dfl: create a dfl bus type to support DFL devices
fpga: fpga-region: Cleanup an outdated comment
fpga: dfl: map feature mmio resources in their own feature drivers
fpga manager: xilinx-spi: provide better diagnostics on programming failure
fpga manager: xilinx-spi: add error checking after gpiod_get_value()
fpga manager: xilinx-spi: fix write_complete timeout handling
fpga manager: xilinx-spi: remove final dot from dev_err() strings
fpga manager: xilinx-spi: remove stray comment
fpga: dfl: change data type of feature id to u16
MAINTAINERS: Add Tom Rix as fpga reviewer
fpga: stratix10-soc: make FPGA task un-interruptible
A collection of fixes I've been accruing over the last few weeks, none
of them have been severe enough to warrant flushing the queue but it's
been long enough now that it's a good idea to send them in.
A handful of them are fixups for QSPI DT/bindings/compatibles, some
smaller fixes for system DMA clock control and TMU interrupts on i.MX,
a handful of fixes for OMAP, including a fix for DSI (display) on omap5.
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Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC fixes from Olof Johansson:
"A collection of fixes I've been accruing over the last few weeks, none
of them have been severe enough to warrant flushing the queue but it's
been long enough now that it's a good idea to send them in.
A handful of them are fixups for QSPI DT/bindings/compatibles, some
smaller fixes for system DMA clock control and TMU interrupts on i.MX,
a handful of fixes for OMAP, including a fix for DSI (display) on
omap5"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (27 commits)
arm64: dts: ns2: Fixed QSPI compatible string
ARM: dts: BCM5301X: Fixed QSPI compatible string
ARM: dts: NSP: Fixed QSPI compatible string
ARM: dts: bcm: HR2: Fixed QSPI compatible string
dt-bindings: spi: Fix spi-bcm-qspi compatible ordering
ARM: dts: imx6sx: fix the pad QSPI1B_SCLK mux mode for uart3
arm64: dts: imx8mp: correct sdma1 clk setting
arm64: dts: imx8mq: Fix TMU interrupt property
ARM: dts: imx7d-zii-rmu2: fix rgmii phy-mode for ksz9031 phy
ARM: dts: vfxxx: Add syscon compatible with OCOTP
ARM: dts: imx6q-logicpd: Fix broken PWM
arm64: dts: imx: Add missing imx8mm-beacon-kit.dtb to build
ARM: dts: imx6q-prtwd2: Remove unneeded i2c unit name
ARM: dts: imx6qdl-gw51xx: Remove unneeded #address-cells/#size-cells
ARM: dts: imx7ulp: Correct gpio ranges
ARM: dts: ls1021a: fix QuadSPI-memory reg range
arm64: defconfig: Enable ptn5150 extcon driver
arm64: defconfig: Enable USB gadget with configfs
ARM: configs: Update Integrator defconfig
ARM: dts: omap5: Fix DSI base address and clocks
...
Here are some small USB and Thunderbolt driver fixes for 5.9-rc5.
Nothing huge, just a number of bugfixes and new device ids for problems
reported:
- new USB serial driver ids
- bug fixes for syzbot reported problems
- typec driver fixes
- thunderbolt driver fixes
- revert of reported broken commit
All of these have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB/Thunderbolt fixes from Greg KH:
"Here are some small USB and Thunderbolt driver fixes for 5.9-rc5.
Nothing huge, just a number of bugfixes and new device ids for
problems reported:
- new USB serial driver ids
- bug fixes for syzbot reported problems
- typec driver fixes
- thunderbolt driver fixes
- revert of reported broken commit
All of these have been in linux-next with no reported issues"
* tag 'usb-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: typec: intel_pmc_mux: Do not configure SBU and HSL Orientation in Alternate modes
usb: typec: intel_pmc_mux: Do not configure Altmode HPD High
usb: core: fix slab-out-of-bounds Read in read_descriptors
Revert "usb: dwc3: meson-g12a: fix shared reset control use"
usb: typec: ucsi: acpi: Check the _DEP dependencies
usb: typec: intel_pmc_mux: Un-register the USB role switch
usb: Fix out of sync data toggle if a configured device is reconfigured
USB: serial: option: support dynamic Quectel USB compositions
USB: serial: option: add support for SIM7070/SIM7080/SIM7090 modules
thunderbolt: Use maximum USB3 link rate when reclaiming if link is not up
thunderbolt: Disable ports that are not implemented
USB: serial: ftdi_sio: add IDs for Xsens Mti USB converter
Here are a number of Staging and IIO driver fixes for 5.9-rc5.
The majority of these are IIO driver fixes, to resolve a timestamp issue
that was recently found to affect a bunch of IIO drivers.
The other fixes in here are:
- small IIO driver fixes
- greybus driver fix
- counter driver fix (came in through the IIO fixes tree)
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging/IIO driver fixes from Greg KH:
"Here are a number of staging and IIO driver fixes for 5.9-rc5.
The majority of these are IIO driver fixes, to resolve a timestamp
issue that was recently found to affect a bunch of IIO drivers.
The other fixes in here are:
- small IIO driver fixes
- greybus driver fix
- counter driver fix (came in through the IIO fixes tree)
All of these have been in linux-next for a while with no reported
issues"
* tag 'staging-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (23 commits)
iio: adc: mcp3422: fix locking on error path
iio: adc: mcp3422: fix locking scope
iio: adc: meson-saradc: Use the parent device to look up the calib data
iio:adc:max1118 Fix alignment of timestamp and data leak issues
iio:adc:ina2xx Fix timestamp alignment issue.
iio:adc:ti-adc084s021 Fix alignment and data leak issues.
iio:adc:ti-adc081c Fix alignment and data leak issues
iio:magnetometer:ak8975 Fix alignment and data leak issues.
iio:light:ltr501 Fix timestamp alignment issue.
iio:light:max44000 Fix timestamp alignment and prevent data leak.
iio:chemical:ccs811: Fix timestamp alignment and prevent data leak.
iio:proximity:mb1232: Fix timestamp alignment and prevent data leak.
iio:accel:mma7455: Fix timestamp alignment and prevent data leak.
iio:accel:bmc150-accel: Fix timestamp alignment and prevent data leak.
iio:accel:mma8452: Fix timestamp alignment and prevent data leak.
iio: accel: kxsd9: Fix alignment of local buffer.
iio: adc: rockchip_saradc: select IIO_TRIGGERED_BUFFER
iio: adc: ti-ads1015: fix conversion when CONFIG_PM is not set
counter: microchip-tcb-capture: check the correct variable
iio: cros_ec: Set Gyroscope default frequency to 25Hz
...
Here are some small driver core and debugfs fixes for 5.9-rc5
Included in here are:
- firmware loader memory leak fix
- firmware loader testing fixes for non-EFI systems
- device link locking fixes found by lockdep
- kobject_del() bugfix that has been affecting some callers
- debugfs minor fix
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are some small driver core and debugfs fixes for 5.9-rc5
Included in here are:
- firmware loader memory leak fix
- firmware loader testing fixes for non-EFI systems
- device link locking fixes found by lockdep
- kobject_del() bugfix that has been affecting some callers
- debugfs minor fix
All of these have been in linux-next for a while with no reported
issues"
* tag 'driver-core-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
test_firmware: Test platform fw loading on non-EFI systems
PM: <linux/device.h>: fix @em_pd kernel-doc warning
kobject: Drop unneeded conditional in __kobject_del()
driver core: Fix device_pm_lock() locking for device links
MAINTAINERS: Add the security document to SECURITY CONTACT
driver code: print symbolic error code
debugfs: Fix module state check condition
kobject: Restore old behaviour of kobject_del(NULL)
firmware_loader: fix memory leak for paged buffer
5.9, please pull the following:
- Florian fixes the Broadcom QSPI controller binding such that the most
specific compatible string is the left most one, and all existing
in-tree users are updated as well.
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Merge tag 'arm-soc/for-5.9/devicetree-fixes' of https://github.com/Broadcom/stblinux into arm/fixes
This pull request contains Broadcom ARM-based SoCs Device Tree fixes for
5.9, please pull the following:
- Florian fixes the Broadcom QSPI controller binding such that the most
specific compatible string is the left most one, and all existing
in-tree users are updated as well.
* tag 'arm-soc/for-5.9/devicetree-fixes' of https://github.com/Broadcom/stblinux:
arm64: dts: ns2: Fixed QSPI compatible string
ARM: dts: BCM5301X: Fixed QSPI compatible string
ARM: dts: NSP: Fixed QSPI compatible string
ARM: dts: bcm: HR2: Fixed QSPI compatible string
dt-bindings: spi: Fix spi-bcm-qspi compatible ordering
Link: https://lore.kernel.org/r/20200909211857.4144718-1-f.fainelli@gmail.com
Signed-off-by: Olof Johansson <olof@lixom.net>
- Fix the misspelling of 'interrupts' property in i.MX8MQ TMU DT node.
- Correct 'ahb' clock for i.MX8MP SDMA1 in device tree.
- Fix pad QSPI1B_SCLK mux mode for UART3 on i.MX6SX.
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Merge tag 'imx-fixes-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/fixes
i.MX fixes for 5.9, round 2:
- Fix the misspelling of 'interrupts' property in i.MX8MQ TMU DT node.
- Correct 'ahb' clock for i.MX8MP SDMA1 in device tree.
- Fix pad QSPI1B_SCLK mux mode for UART3 on i.MX6SX.
* tag 'imx-fixes-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
ARM: dts: imx6sx: fix the pad QSPI1B_SCLK mux mode for uart3
arm64: dts: imx8mp: correct sdma1 clk setting
arm64: dts: imx8mq: Fix TMU interrupt property
Link: https://lore.kernel.org/r/20200909143844.GA25109@dragon
Signed-off-by: Olof Johansson <olof@lixom.net>
Few fixes for omap based devices:
- Fix of_clk_get() error handling for omap-iommu
- Fix missing audio pinctrl entries for logicpd boards
- Fix video for logicpd-som-lv after switch to generic panels
- Fix omap5 DSI clocks base
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Merge tag 'omap-for-v5.9/fixes-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/fixes
Fixes for omaps for v5.9-rc cycle
Few fixes for omap based devices:
- Fix of_clk_get() error handling for omap-iommu
- Fix missing audio pinctrl entries for logicpd boards
- Fix video for logicpd-som-lv after switch to generic panels
- Fix omap5 DSI clocks base
* tag 'omap-for-v5.9/fixes-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: omap5: Fix DSI base address and clocks
ARM: dts: logicpd-som-lv-baseboard: Fix missing video
ARM: dts: logicpd-som-lv-baseboard: Fix broken audio
ARM: dts: logicpd-torpedo-baseboard: Fix broken audio
ARM: OMAP2+: Fix an IS_ERR() vs NULL check in _get_pwrdm()
Link: https://lore.kernel.org/r/pull-1599132064-54898@atomide.com
Signed-off-by: Olof Johansson <olof@lixom.net>
Here are a number of small driver fixes for 5.9-rc5
Included in here are:
- habanalabs driver fixes
- interconnect driver fixes
- soundwire driver fixes
- dyndbg fixes for reported issues, and then reverts to fix it
all up to a sane state.
- phy driver fixes
Full details of these are in the shortlog.
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char / misc driver fixes from Greg KH:
"Here are a number of small driver fixes for 5.9-rc5
Included in here are:
- habanalabs driver fixes
- interconnect driver fixes
- soundwire driver fixes
- dyndbg fixes for reported issues, and then reverts to fix it all up
to a sane state.
- phy driver fixes
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
Revert "dyndbg: accept query terms like file=bar and module=foo"
Revert "dyndbg: fix problem parsing format="foo bar""
scripts/tags.sh: exclude tools directory from tags generation
video: fbdev: fix OOB read in vga_8planes_imageblit()
dyndbg: fix problem parsing format="foo bar"
dyndbg: refine export, rename to dynamic_debug_exec_queries()
dyndbg: give %3u width in pr-format, cosmetic only
interconnect: qcom: Fix small BW votes being truncated to zero
soundwire: fix double free of dangling pointer
interconnect: Show bandwidth for disabled paths as zero in debugfs
habanalabs: fix report of RAZWI initiator coordinates
habanalabs: prevent user buff overflow
phy: omap-usb2-phy: disable PHY charger detect
phy: qcom-qmp: Use correct values for ipq8074 PCIe Gen2 PHY init
soundwire: bus: fix typo in comment on INTSTAT registers
phy: qualcomm: fix return value check in qcom_ipq806x_usb_phy_probe()
phy: qualcomm: fix platform_no_drv_owner.cocci warnings
- Multiple stolen time fixes, with a new capability to match x86
- Fix for hugetlbfs mappings when PUD and PMD are the same level
- Fix for hugetlbfs mappings when PTE mappings are enforced
(dirty logging, for example)
- Fix tracing output of 64bit values
x86:
- nSVM state restore fixes
- Async page fault fixes
- Lots of small fixes everywhere
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"A bit on the bigger side, mostly due to me being on vacation, then
busy, then on parental leave, but there's nothing worrisome.
ARM:
- Multiple stolen time fixes, with a new capability to match x86
- Fix for hugetlbfs mappings when PUD and PMD are the same level
- Fix for hugetlbfs mappings when PTE mappings are enforced (dirty
logging, for example)
- Fix tracing output of 64bit values
x86:
- nSVM state restore fixes
- Async page fault fixes
- Lots of small fixes everywhere"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (25 commits)
KVM: emulator: more strict rsm checks.
KVM: nSVM: more strict SMM checks when returning to nested guest
SVM: nSVM: setup nested msr permission bitmap on nested state load
SVM: nSVM: correctly restore GIF on vmexit from nesting after migration
x86/kvm: don't forget to ACK async PF IRQ
x86/kvm: properly use DEFINE_IDTENTRY_SYSVEC() macro
KVM: VMX: Don't freeze guest when event delivery causes an APIC-access exit
KVM: SVM: avoid emulation with stale next_rip
KVM: x86: always allow writing '0' to MSR_KVM_ASYNC_PF_EN
KVM: SVM: Periodically schedule when unregistering regions on destroy
KVM: MIPS: Change the definition of kvm type
kvm x86/mmu: use KVM_REQ_MMU_SYNC to sync when needed
KVM: nVMX: Fix the update value of nested load IA32_PERF_GLOBAL_CTRL control
KVM: fix memory leak in kvm_io_bus_unregister_dev()
KVM: Check the allocation of pv cpu mask
KVM: nVMX: Update VMCS02 when L2 PAE PDPTE updates detected
KVM: arm64: Update page shift if stage 2 block mapping not supported
KVM: arm64: Fix address truncation in traces
KVM: arm64: Do not try to map PUDs when they are folded into PMD
arm64/x86: KVM: Introduce steal-time cap
...
Fixes for compile issues pointed out by kbuild and one bug I found in
interd with the 5.9 patches.
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Merge tag 'for-linus' of git://github.com/openrisc/linux
Pull OpenRISC fixes from Stafford Horne:
"Fixes for compile issues pointed out by kbuild and one bug I found in
initrd with the 5.9 patches"
* tag 'for-linus' of git://github.com/openrisc/linux:
openrisc: Fix issue with get_user for 64-bit values
openrisc: Fix cache API compile issue when not inlining
openrisc: Reserve memblock for initrd
- Fix memory resource leak of user_notif under TSYNC race (Tycho Andersen)
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Merge tag 'seccomp-v5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull seccomp fixes from Kees Cook:
"This fixes a rare race condition in seccomp when using TSYNC and
USER_NOTIF together where a memory allocation would not get freed
(found by syzkaller, fixed by Tycho).
Additionally updates Tycho's MAINTAINERS and .mailmap entries for his
new address"
* tag 'seccomp-v5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
seccomp: don't leave dangling ->notif if file allocation fails
mailmap, MAINTAINERS: move to tycho.pizza
seccomp: don't leak memory when filter install races
Fix decetion of dax support for block devices. Previous fixes in this
area, which only affected printing of debug messages, had an incorrect
condition for detection of dax. This fix should finally do the right thing.
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Merge tag 'libnvdimm-fix-v5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fix from Vishal Verma:
"Fix detection of dax support for block devices.
Previous fixes in this area, which only affected printing of debug
messages, had an incorrect condition for detection of dax. This fix
should finally do the right thing"
* tag 'libnvdimm-fix-v5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
dax: fix detection of dax support for non-persistent memory block devices
