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When booting the kernel we access system registers such as GCR_EL1
if MTE is supported. These accesses are defined to trap to EL3 if
SCR_EL3.ATA is disabled. Furthermore, tag accesses will not behave
as expected if SCR_EL3.ATA is not set, or if HCR_EL2.ATA is not set
and we were booted at EL1. Therefore, require that these bits are
enabled when appropriate.
Signed-off-by: Peter Collingbourne <pcc@google.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://linux-review.googlesource.com/id/Iadcfd4dcd9ba3279b2813970b44d7485b0116709
Link: https://lore.kernel.org/r/20220422202912.292039-1-pcc@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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functions
Fix the documentation for the hsiphash functions to avoid conflating the
HalfSipHash algorithm with the hsiphash functions, since these functions
actually implement either HalfSipHash or SipHash, and random.c now uses
HalfSipHash (in a very special way) without the hsiphash functions.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Render usage example of HalfSipHash function as code block by using
literal block syntax.
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Render danger paragraph into warning block for emphasization.
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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This reverts 35a33ff3807d ("random: use memmove instead of memcpy for
remaining 32 bytes"), which was made on a totally bogus basis. The thing
it was worried about overlapping came from the stack, not from one of
its arguments, as Eric pointed out.
But the fact that this confusion even happened draws attention to the
fact that it's a bit non-obvious that the random_data parameter can
alias chacha_state, and in fact should do so when the caller can't rely
on the stack being cleared in a timely manner. So this commit documents
that.
Reported-by: Eric Biggers <ebiggers@kernel.org>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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XSAVEC is the user space counterpart of XSAVES which cannot save supervisor
state. In virtualization scenarios the hypervisor does not expose XSAVES
but XSAVEC to the guest, though the kernel does not make use of it.
That's unfortunate because XSAVEC uses the compacted format of saving the
XSTATE. This is more efficient in terms of storage space vs. XSAVE[OPT] as
it does not create holes for XSTATE components which are not supported or
enabled by the kernel but are available in hardware. There is room for
further optimizations when XSAVEC/S and XGETBV1 are supported.
In order to support XSAVEC:
- Define the XSAVEC ASM macro as it's not yet supported by the required
minimal toolchain.
- Create a software defined X86_FEATURE_XCOMPACTED to select the compacted
XSTATE buffer format for both XSAVEC and XSAVES.
- Make XSAVEC an option in the 'XSAVE' ASM alternatives
Requested-by: Andrew Cooper <Andrew.Cooper3@citrix.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220404104820.598704095@linutronix.de
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Variable end is being initialized with a value that is never read, it
is being re-assigned later with the same value. The initialization is
redundant and can be removed.
Cleans up clang scan build warning:
kernel/irq/matrix.c:289:25: warning: Value stored to 'end' during its
initialization is never read [deadcode.DeadStores]
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20220422110418.1264778-1-colin.i.king@gmail.com
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Since version 5.13, the standard syscon bindings have been added
to all clps711x DT nodes, so we can now use the more general
syscon_regmap_lookup_by_phandle function to get the syscon pointer.
Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
Link: https://lore.kernel.org/r/20220420061038.22570-1-eagle.alexander923@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Using pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. This change is just to simplify the code, no
actual functional changes.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220420090452.2588930-1-chi.minghao@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
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pm_runtime_get_sync
Using pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. This change is just to simplify the code, no
actual functional changes.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220414085637.2541805-1-chi.minghao@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
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pm_runtime_get_sync
Using pm_runtime_resume_and_get is more appropriate
for simplifing code
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220418110141.2559019-1-chi.minghao@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
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With the removal of the incorrect logic of cqspi_set_protocol(), ops with
cmd/addr buswidth >1 are now working correctly.
Tested on a TI AM64x with a Macronix MX25U51245G QSPI flash using 1-4-4
operations.
DTR operations are currently untested, so we leave them disabled for now
(except for the previously allowed 8-8-8 ops).
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Link: https://lore.kernel.org/r/20220420155616.281730-2-matthias.schiffer@ew.tq-group.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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As suggested, this removes the whole cqspi_set_protocol() function, as it
is not actually needed:
- Checks for unsupported operations are already handled by supports_op(),
removing the need to distinguish DTR and non-DTR modes in the buswidth
setup
- supports_op() ensures that the DTR flags match for all relevant parts of
an operation, so op->cmd.dtr can be used instead of copying the flag to
the cqspi_flash_pdata
- The logic in cqspi_set_protocol() is moved to cqspi_calc_rdreg() and
cqspi_write_setup() (with a helper macro CQSPI_OP_WIDTH())
The helper macro checks nbytes instead of buswidth for 0, for consistency
with supports_op() etc.
Suggested-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Link: https://lore.kernel.org/r/20220420155616.281730-1-matthias.schiffer@ew.tq-group.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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pm_runtime_get_sync
Using pm_runtime_resume_and_get is more appropriate
for simplifing code
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220418110103.2558955-1-chi.minghao@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
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The hardware (except for the ROCKCHIP_SPI_VER2_TYPE2 version) does not
support active-high native chip selects. However if such a CS is configured
the core does not error as it normally should, because the
'ctlr->use_gpio_descriptors = true' line in rockchip_spi_probe() makes the
core set SPI_CS_HIGH in ctlr->mode_bits.
In such a case the spi-rockchip driver operates normally but produces an
active-low chip select signal without notice.
There is no provision in the current core code to handle this
situation. Fix by adding a check in the ctlr->setup function (similarly to
what spi-atmel.c does).
This cannot be done reading the SPI_CS_HIGH but in ctlr->mode_bits because
that bit gets always set by the core for master mode (see above).
Fixes: eb1262e3cc8b ("spi: spi-rockchip: use num-cs property and ctlr->enable_gpiods")
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://lore.kernel.org/r/20220421213251.1077899-1-luca.ceresoli@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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pm_runtime_get_sync
Using pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. This change is just to simplify the code, no
actual functional changes.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220414085433.2541670-1-chi.minghao@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
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Using pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. This change is just to simplify the code, no
actual functional changes.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220420090420.2588868-1-chi.minghao@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
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Using pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. This change is just to simplify the code, no
actual functional changes.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220414085343.2541608-1-chi.minghao@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
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Using pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. This change is just to simplify the code, no
actual functional changes.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220414085506.2541732-1-chi.minghao@zte.com.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
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1.Since it would be dangerous to specify a newer SoC's compatible
string as the fallback of an older SoC's compatible string, we
add support for the "ingenic,jz4775-spi" compatible string in
the driver.
This will permit to support the JZ4775 by having:
compatible = "ingenic,jz4775-spi";
Instead of doing:
compatible = "ingenic,jz4775-spi", "ingenic,jz4780-spi";
2.Add support for probing the spi-ingenic driver on the X1000 SoC
from Ingenic. From the X1000 SoC onwards, the maximum frequency
allowed by the SSI module of Ingenic SoCs has been changed from
54MHz to 50MHz. So "max_speed_hz" is introduced in "jz_soc_info"
to set different maximum frequency values.
3.Add support for probing the spi-ingenic driver on the X2000 SoC
from Ingenic. The X2000 SoC has only one native chip select line,
so "max_native_cs" is introduced in "jz_soc_info" to set different
maximum number of native chip select lines.
4.Because of the introduction of support for the X-series SoCs, the
current driver is not only applicable to the JZ-series SoCs, so
the description texts has been modified to avoid misunderstanding.
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/1650724725-93758-4-git-send-email-zhouyanjie@wanyeetech.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Add the SPI bindings for the JZ4775 SoC, the X1000 SoC,
and the X2000 SoC from Ingenic.
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/1650724725-93758-3-git-send-email-zhouyanjie@wanyeetech.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Add support for using GPIOs as chip select lines on Ingenic SoCs.
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/1650724725-93758-2-git-send-email-zhouyanjie@wanyeetech.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Having one enable-gpios property for all regulators is discouraged and
instead, similarly to regulator core ena_gpiod feature, each GPIO should
be present in each regulator node. Add support for parsing such GPIOs,
keeping backwards compatibility.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: ChiYuan Huang <cy_huang@richtek.com>
Link: https://lore.kernel.org/r/20220425072455.27356-3-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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The binding and driver duplicated regulator core feature of controlling
regulators with GPIOs (of_parse_cb + ena_gpiod) and created its own
enable-gpios property with multiple GPIOs.
This is a less preferred way, because enable-gpios should enable only one
element, not multiple. It also duplicates existing solution.
Deprecate the original 'enable-gpios' and add per-regulator property.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220425072455.27356-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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Current logic does not consider multi-stride cases,
the max_register have to calculate with reg_stride
because it is a kind of address range.
Signed-off-by: Jeongtae Park <jtp.park@samsung.com>
Link: https://lore.kernel.org/r/20220425114613.15934-1-jtp.park@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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As pointed out by Sascha Hauer, this patch changes:
if (pmc->config && !pcm->config->prepare_slave_config)
<do nothing>
to:
if (pmc->config && !pcm->config->prepare_slave_config)
snd_dmaengine_pcm_prepare_slave_config()
This breaks the drivers that do not need a call to
dmaengine_slave_config(). Drivers that still need to call
snd_dmaengine_pcm_prepare_slave_config(), but have a NULL
pcm->config->prepare_slave_config should use
snd_dmaengine_pcm_prepare_slave_config() as their prepare_slave_config
callback.
Fixes: 9a1e13440a4f ("ASoC: dmaengine: do not use a NULL prepare_slave_config() callback")
Reported-by: Sascha Hauer <sha@pengutronix.de>
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20220421125403.2180824-1-codrin.ciubotariu@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Since a pointer to struct snd_dmaengine_pcm_config is passed,
snd_dmaengine_pcm_prepare_slave_config() is no longer called unless it's
explicitly set in prepare_slave_config.
Fixes: 50291652af52 ("ASoC: atmel: mchp-pdmc: add PDMC driver")
Suggested-by: Sascha Hauer <sha@pengutronix.de>
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20220421125403.2180824-2-codrin.ciubotariu@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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The max98090 driver has some custom controls which share a put() function
which returns 0 unconditionally, meaning that events are not generated
when the value changes. Fix that.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220420193454.2647908-2-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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The max98090 driver has a custom put function for some controls which can
only be updated in certain circumstances which makes no effort to validate
that input is suitable for the control, allowing out of spec values to be
written to the hardware and presented to userspace. Fix this by returning
an error when invalid values are written.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220420193454.2647908-1-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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is stopped
When tick_nohz_stop_tick() stops the tick and high resolution timers are
disabled, then the clock event device is not put into ONESHOT_STOPPED
mode. This can lead to spurious timer interrupts with some clock event
device drivers that don't shut down entirely after firing.
Eliminate these by putting the device into ONESHOT_STOPPED mode at points
where it is not being reprogrammed. When there are no timers active, then
tick_program_event() with KTIME_MAX can be used to stop the device. When
there is a timer active, the device can be stopped at the next tick (any
new timer added by timers will reprogram the tick).
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220422141446.915024-1-npiggin@gmail.com
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- Drop CONFIG_BINFMT_AOUT=m (no longer available since commit
19e8b701e258701b ("a.out: Stop building a.out/osf1 support on alpha
and m68k")),
- Enable modular build of the SM3 digest algorithm (no longer
auto-selected since commit 114004696bf23499 ("crypto: sm2 - make
dependent on sm3 library")),
- Drop CONFIG_CRC64=m (auto-selected since commit a7d4383f17e10f33
("block: add pi for extended integrity")),
- Drop CONFIG_TEST_OVERFLOW=m (replaced by auto-modular
CONFIG_OVERFLOW_KUNIT_TEST in commit 617f55e20743fc50 ("lib:
overflow: Convert to Kunit")),
- Drop CONFIG_TEST_STACKINIT=m (replaced by auto-modular
CONFIG_STACKINIT_KUNIT_TEST in commit 02788ebcf521fe78 ("lib:
stackinit: Convert to KUnit")).
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/2ca38d8de70fc9fad5ad17fb81d04736effa181d.1649066720.git.geert@linux-m68k.org
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test_barrier fails on s390 because of the missing KCSAN instrumentation
for several synchronization primitives.
Add it to barriers by defining __mb(), __rmb(), __wmb(), __dma_rmb()
and __dma_wmb(), and letting the common code in asm-generic/barrier.h
do the rest.
Spinlocks require instrumentation only on the unlock path; notify KCSAN
that the CPU cannot move memory accesses outside of the spin lock. In
reality it also cannot move stores inside of it, but this is not
important and can be omitted.
Reported-by: Tobias Huschle <huschle@linux.ibm.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Currently it is not detectable from within Linux when PCI instructions
are retried because of a busy condition. Detecting such conditions and
especially how long they lasted can however be quite useful in problem
determination. This patch enables this by adding an s390dbf error log
when a CC 2 is first encountered as well as after the retried
instruction.
Despite being unlikely it may be possible that these added debug
messages drown out important other messages so allow setting the debug
level in zpci_err_insn*() and set their level to 1 so they can be
filtered out if need be.
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Currently when a PCI instruction returns a non-zero condition code it
can be very hard to tell from the s390dbf logs what kind of instruction
was executed. In case of PCI memory I/O (MIO) instructions it is even
impossible to tell if we attempted a load, store or block store or how
large the access was because only the address is logged.
Improve this by adding an indicator byte for the instruction type to the
error record and also store the length of the access for MIO
instructions where this can not be deduced from the request.
We use the following indicator values:
- 'l': PCI load
- 's': PCI store
- 'b': PCI store block
- 'L': PCI load (MIO)
- 'S': PCI store (MIO)
- 'B': PCI store block (MIO)
- 'M': MPCIFC
- 'R': RPCIT
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Availability events are logged in s390dbf in s390dbf/pci_error/hex_ascii
even though they don't indicate an error condition.
They have also become redundant as commit 6526a597a2e85 ("s390/pci: add
simpler s390dbf traces for events") added an s390dbf/pci_msg/sprintf log
entry for availability events which contains all non reserved fields of
struct zpci_ccdf_avail. On the other hand the availability entries in
the error log make it easy to miss actual errors and may even overwrite
error entries if the message buffer wraps.
Thus simply remove the availability events from the error log thereby
establishing the rule that any content in s390dbf/pci_error indicates
some kind of error.
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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While the zpci_dbg() macro offers a level parameter this is currently
largely unused. The only instance with higher importance than 3 is the
UID checking change debug message which is not actually more important
as the UID uniqueness guarantee is already exposed in sysfs so this
should rather be 3 as well.
On the other hand the "add ..." message which shows what devices are
visible at the lowest level is essential during problem determination.
By setting its level to 1, lowering the debug level can act as a filter
to only show the available functions.
On the error side the default level is set to 6 while all existing
messages are printed at level 0. This is inconsistent and means there is
no room for having messages be invisible on the default level so instead
set the default level to 3 like for errors matching the default for
debug messages.
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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The vfio_ap module tries to register for the vfio_ap bus - but that's
the interface that it provides itself, so this does not make much sense,
thus let's simply drop this statement now.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Link: https://lore.kernel.org/r/20220413094416.412114-1-thuth@redhat.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Randomize the address of vdso if randomize_va_space is enabled.
Note that this keeps the vdso address on the same PMD as the stack
to avoid allocating an extra page table just for vdso.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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In the current code vdso is mapped below the stack. This is
problematic when programs mapped to the top of the address space
are allocating a lot of memory, because the heap will clash with
the vdso. To avoid this map the vdso above the stack and move
STACK_TOP so that it all fits into three level paging.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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This is a preparation patch for adding vdso randomization to s390.
It adds a function vdso_size(), which will be used later in calculating
the STACK_TOP value. It also moves the vdso mapping into a new function
vdso_map(), to keep the code similar to other architectures.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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This basically reverts commit 9e78a13bfb16 ("[S390] reduce miminum
gap between stack and mmap_base"). 32MB is not enough space
between stack and mmap for some programs. Given that compat
task aren't common these days, lets revert back to 128MB.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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This patch tries to fix as much as possible of the
checkpatch.pl --strict findings:
CHECK: Logical continuations should be on the previous line
CHECK: No space is necessary after a cast
CHECK: Alignment should match open parenthesis
CHECK: 'useable' may be misspelled - perhaps 'usable'?
WARNING: Possible repeated word: 'is'
CHECK: spaces preferred around that '*' (ctx:VxV)
CHECK: Comparison to NULL could be written "!msg"
CHECK: Prefer kzalloc(sizeof(*zc)...) over kzalloc(sizeof(struct...)...)
CHECK: Unnecessary parentheses around resp_type->work
CHECK: Avoid CamelCase: <xcRB>
There is no functional change comming with this patch, only
code cleanup, renaming, whitespaces, indenting, ... but no
semantic change in any way. Also the API (zcrypt and pkey
header file) is semantically unchanged.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Jürgen Christ <jchrist@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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This patch does a little cleanup on the CPRBX struct
in zcrypt.h and the redundant CPRB struct definition in
zcrypt_msgtype6.c. Especially some of the misleading
fields from the CPRBX struct have been removed.
There is no semantic change coming with this patch.
The field names changed in the XCRB struct are only related
to reserved fields which should never been used.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Jürgen Christ <jchrist@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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This patch introduces user space notifications for changes
on the apmask or aqmask attributes. So it could be possible
to write a udev rule to load/unload the vfio_ap kernel module
based on changes of these masks.
On chance of the apmask or aqmask an AP change event will
be produced with an uevent environment variable showing
the new APMASK or AQMASK mask.
So a change on the apmask triggers an uvevent like this:
KERNEL[490.160396] change /devices/ap (ap)
ACTION=change
DEVPATH=/devices/ap
SUBSYSTEM=ap
APMASK=0xffffffdfffffffffffffffffffffffffffffffffffffffffffffffffffffffff
SEQNUM=13367
and a change on the aqmask looks like this:
KERNEL[283.217642] change /devices/ap (ap)
ACTION=change
DEVPATH=/devices/ap
SUBSYSTEM=ap
AQMASK=0xfbffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
SEQNUM=13348
Only real changes to the masks are processed - the old and
new masks are compared and no action is done if the values
are equal (and thus no uevent). The emit of the uevent is
the very last action done when a mask change is processed.
However, there is no guarantee that all unbind/bind actions
caused by the apmask/aqmask changes are completed when the
apmask/aqmask change uevent is received in userspace.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Jürgen Christ <jchrist@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Fix the following coccicheck warnings:
./arch/s390/include/asm/scsw.h:695:47-49: WARNING
!A || A && B is equivalent to !A || B
I apply a readable version just to get rid of a warning.
Signed-off-by: Haowen Bai <baihaowen@meizu.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Link: https://lore.kernel.org/r/1649297808-5048-1-git-send-email-baihaowen@meizu.com
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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SPX instruction called from set_prefix() expects physical
address of the lowcore to be installed, but instead the
virtual address is passed.
Note: this does not fix a bug currently, since virtual and
physical addresses are identical.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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This patch extends the sysfs attribute mkvps for CCA cards
to show the states and master key verification patterns for
the old, current and new ASYM master key registers.
With this patch now all relevant master key verification
patterns related to a CCA HSM are available with the mkvps
sysfs attribute. This is a requirement for some exploiters
like the kubernetes cex plugin or initrd code needing to
verify the master key verification patterns on HSMs before
use.
A sample output:
cat /sys/devices/ap/card04/04.0005/mkvps
AES NEW: empty 0x0000000000000000
AES CUR: valid 0xe9a49a58cd039bed
AES OLD: valid 0x7d10d17bc8a409c4
APKA NEW: empty 0x0000000000000000
APKA CUR: valid 0x5f2f27aaa2d59b4a
APKA OLD: valid 0x82a5e2cd5030d5ec
ASYM NEW: empty 0x00000000000000000000000000000000
ASYM CUR: valid 0x650c25a89c27e716d0e692b6c83f10e5
ASYM OLD: valid 0xf8ae2acf8bfc57f0a0957c732c16078b
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Jörg Schmidbauer <jschmidb@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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If the facility IPL-complete-control is present then the last diag308
call made by kexec shall set the end-of-ipl flag in the subcode register
to signal the hypervisor that this is the last diag308 call made by Linux.
Only the diag308 calls made during a regular kexec need to set
the end-of-ipl flag, in all other cases the hypervisor will ignore it.
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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The presence of the IPL-complete-control facility can be derived
from the hypervisor's SCLP info response.
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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This reverts commit 1a67653de0dd, which caused a boot regression.
The behavior of the "drive-push-pull" in the kernel does not
match what the binding document describes. Revert Rob's patch
to make the DT match the kernel again, rather than the binding.
Link: https://lore.kernel.org/lkml/YlVAy95eF%2F9b1nmu@orome/
Reported-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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