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If the xfer fails, it indicates a real error. Log it with an
error message instead of a debug message to reflect its severity.
Link: https://lore.kernel.org/r/20250418211635.2666234-10-andi.shyti@kernel.org
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Shuffle a bit the code in order to avoid prototypes.
Link: https://lore.kernel.org/r/20250426201920.272135-1-andi.shyti@kernel.org
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Adjust the indentation of the bcm_iproc_i2c_slave_init() function
definition to match standard kernel coding style. Don't end the
line with an open parenthesis.
Link: https://lore.kernel.org/r/20250418211635.2666234-8-andi.shyti@kernel.org
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Replace udelay(100) with usleep_range(100, 200) as recommended
by kernel documentation. The delay is not in atomic context, so
busy-waiting is unnecessary.
Also update the comment for clarity.
Link: https://lore.kernel.org/r/20250418211635.2666234-7-andi.shyti@kernel.org
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Drop an unnecessary blank line in bcm_iproc_i2c_slave_isr().
Link: https://lore.kernel.org/r/20250418211635.2666234-6-andi.shyti@kernel.org
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Alignment should match the open parenthesis but in some places it
didn't
Link: https://lore.kernel.org/r/20250418211635.2666234-5-andi.shyti@kernel.org
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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In the kernel u32 should be used instead of unit32_t.
Link: https://lore.kernel.org/r/20250418211635.2666234-4-andi.shyti@kernel.org
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Use dev_err_probe() instead of dev_err() and then return.
Link: https://lore.kernel.org/r/20250418211635.2666234-3-andi.shyti@kernel.org
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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The 'ret' variable doesn't need to be initialised, as it is
always assigned before use.
While here, reorder the variable declarations in reverse
Christmas tree style, by line length.
Link: https://lore.kernel.org/r/20250418211635.2666234-2-andi.shyti@kernel.org
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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The camera sensor is connected via ISP I2C bus in AMD SOC
architectures. Add new I2C designware driver to support
new camera sensors on AMD HW.
Co-developed-by: Venkata Narendra Kumar Gutta <vengutta@amd.com>
Signed-off-by: Venkata Narendra Kumar Gutta <vengutta@amd.com>
Co-developed-by: Bin Du <bin.du@amd.com>
Signed-off-by: Bin Du <bin.du@amd.com>
Signed-off-by: Pratap Nirujogi <pratap.nirujogi@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20250424184952.1290019-1-pratap.nirujogi@amd.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Add support for the MediaTek Dimensity 1200 (MT6893) SoC; this
chip's multiple I2C controller instances are fully compatible
with the ones found in the MT8192 SoC.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250416120303.148017-1-angelogioacchino.delregno@collabora.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Add functions to perform block read and write operations. This applies
for cases where the requested operation is for >8 bytes of data.
When not using the block mode transfer, the driver will attempt a series
of 8 byte i2c operations until it reaches the desired total. For
example, for a 40 byte request the driver will complete 5 separate
transactions. This results in large transactions taking a significant
amount of time to process.
Add block mode such that the driver can request larger transactions, up
to 1024 bytes per transfer.
Many aspects of the block mode transfer is common with the regular 8
byte operations. Use generic functions for parts of the message
construction and sending the message. The key difference for the block
mode is the usage of separate FIFO buffer to store data.
Write to this buffer in the case of a write (before command send).
Read from this buffer in the case of a read (after command send).
Data is written into this buffer by placing data into the MSB onwards.
This means the bottom 8 bits of the data will match the top 8 bits, and
so on and so forth.
Set specific bits in message for block mode, enable block mode transfers
from global i2c management registers, construct message, send message,
read or write from FIFO buffer as required.
The block-mode transactions result in a significant speed increase in
large i2c requests.
Signed-off-by: Aryan Srivastava <aryan.srivastava@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20250324192946.3078712-2-aryan.srivastava@alliedtelesis.co.nz
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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No functional changes.
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Link: https://lore.kernel.org/r/20250415-pasemi-fixes-v2-2-c543bf53151a@svenpeter.dev
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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When changing the #defines to use BIT and GENMASK the bitfield.h include
was added instead of the correct bits.h include.
Reported-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Link: https://lore.kernel.org/r/20250415-pasemi-fixes-v2-1-c543bf53151a@svenpeter.dev
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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When we use constants in a time or frequency related contexts,
it's better to utilise the respective definitions that have
encoded units in them. This will make code better to read and
understand.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: Mukesh Kumar Savaliya <quic_msavaliy@quicinc.com>
Link: https://lore.kernel.org/r/20250416101702.2128740-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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This simplifies the code while improving log.
Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Link: https://lore.kernel.org/r/20250415183447.396277-11-e.zanda1@gmail.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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This simplifies the code while improving log.
Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Link: https://lore.kernel.org/r/20250415183447.396277-10-e.zanda1@gmail.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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This simplifies the code while improving log.
Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Link: https://lore.kernel.org/r/20250415183447.396277-8-e.zanda1@gmail.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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This simplifies the code while improving log.
Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Link: https://lore.kernel.org/r/20250415183447.396277-7-e.zanda1@gmail.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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This simplifies the code while improving log.
Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Link: https://lore.kernel.org/r/20250415183447.396277-6-e.zanda1@gmail.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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This simplifies the code while improving log.
Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Link: https://lore.kernel.org/r/20250415183447.396277-4-e.zanda1@gmail.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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This simplifies the code while improving log.
Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Link: https://lore.kernel.org/r/20250415183447.396277-3-e.zanda1@gmail.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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This simplifies the code while improving log.
Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Link: https://lore.kernel.org/r/20250415183447.396277-2-e.zanda1@gmail.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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During init of the bus, the module checks that the bus is idle.
If one of the lines are stuck try to recover them first before failing.
Sometimes SDA and SCL are low if improper reset occurs (e.g., reboot).
Signed-off-by: Tali Perry <tali.perry1@gmail.com>
Signed-off-by: Mohammed Elbadry <mohammed.0.elbadry@gmail.com>
Reviewed-by: Mukesh Kumar Savaliya <quic_msavaliy@quicinc.com>
Link: https://lore.kernel.org/r/20250328193252.1570811-1-mohammed.0.elbadry@gmail.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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'struct i2c_algorithm' is not modified in this driver.
Constifying this structure moves some data to a read-only section, so
increase overall security, especially when the structure holds some
function pointers.
On a x86_64, with allmodconfig, as an example:
Before:
======
text data bss dec hex filename
11027 646 16 11689 2da9 drivers/i2c/busses/i2c-rzv2m.o
After:
=====
text data bss dec hex filename
11107 566 16 11689 2da9 drivers/i2c/busses/i2c-rzv2m.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Link: https://lore.kernel.org/r/537d93441ced53bffa6553b8ec93d007e64cb9a5.1743258995.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Add corresponding error messages if DMA channels are not available during
probe. Using dev_err_probe adds deferred probe messages as well.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250408100300.556703-1-alexander.stein@ew.tq-group.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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The PCC driver now handles mapping and unmapping of shared memory
areas as part of pcc_mbox_{request,free}_channel(). Without these before,
this xgene-slimpro I2C driver did handling of those mappings like several
other PCC mailbox client drivers.
There were redundant operations, leading to unnecessary code. Maintaining
the consistency across these driver was harder due to scattered handling
of shmem.
Just use the mapped shmem and remove all redundant operations from this
driver.
Cc: Andi Shyti <andi.shyti@kernel.org>
Cc: linux-i2c@vger.kernel.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20250411112303.1149086-1-sudeep.holla@arm.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Add check for the return value of clk_enable() to catch
the potential error.
This is similar to the commit 8332e6670997
("spi: zynq-qspi: Add check for clk_enable()").
Signed-off-by: Chenyuan Yang <chenyuan0y@gmail.com>
Link: https://lore.kernel.org/r/20250412193713.105838-1-chenyuan0y@gmail.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Return value from npcm_i2c_get_slave_addr() directly instead of taking
this in another redundant variable.
This improvement has been suggested by Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Zhang Songyi <zhang.songyi@zte.com.cn>
Link: https://lore.kernel.org/r/20250320004321.1914366-1-andi.shyti@kernel.org
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Since we have generic definitions for bus frequencies, let's use them.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Christopher Obbard <christopher.obbard@linaro.org>
Reviewed-by: Mukesh Kumar Savaliya <quic_msavaliy@quicinc.com>
Link: https://lore.kernel.org/r/20250322144736.472777-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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Adjust the implementation of css_is_cgroup() so that it compares the given
css to cgroup::self. Rename the function to css_is_self() in order to
reflect that. Change the existing css->ss NULL check to a warning in the
true branch. Finally, adjust call sites to use the new function name.
Signed-off-by: JP Kobryn <inwardvessel@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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An early init subsystem that attempts to make use of rstat can lead to
failures during early boot. The reason for this is the timing in which the
css's of the root cgroup have css_online() invoked on them. At the point of
this call, there is a stated assumption that a cgroup has "successfully
completed all allocations" [0]. An example of a subsystem that relies on
the previously mentioned assumption [0] is the memory subsystem. Within its
implementation of css_online(), work is queued to asynchronously begin
flushing via rstat. In the early init path for a given subsystem, having
rstat enabled leads to this sequence:
cgroup_init_early()
for_each_subsys(ss, ssid)
if (ss->early_init)
cgroup_init_subsys(ss, true)
cgroup_init_subsys(ss, early_init)
css = ss->css_alloc(...)
init_and_link_css(css, ss, ...)
...
online_css(css)
online_css(css)
ss = css->ss
ss->css_online(css)
Continuing to use the memory subsystem as an example, the issue with this
sequence is that css_rstat_init() has not been called yet. This means there
is now a race between the pending async work to flush rstat and the call to
css_rstat_init(). So a flush can occur within the given cgroup while the
rstat fields are not initialized.
Since we are in the early init phase, the rstat fields cannot be
initialized because they require per-cpu allocations. So it's not possible
to have css_rstat_init() called early enough (before online_css()). This
patch treats the combination of early init and rstat the same as as other
invalid conditions.
[0] Documentation/admin-guide/cgroup-v1/cgroups.rst (section: css_online)
Signed-off-by: JP Kobryn <inwardvessel@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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Add the test counts to the JSON output from kunit.py. For example:
...
"git_branch": "kselftest",
"misc":
{
"tests": 2,
"passed": 1.
"failed": 1,
"crashed": 0,
"skipped": 0,
"errors": 0,
}
...
To output the JSON using the following command:
./tools/testing/kunit/kunit.py run example --json
This has been requested by KUnit users. The counts are in a "misc"
field because the JSON output needs to be compliant with the KCIDB
submission guide. There are no counts fields but there is a "misc" field
in the guide.
Link: https://lore.kernel.org/r/20250516201615.1237037-1-rmoar@google.com
Signed-off-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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The documentation on testing static functions using the KUnit macros
VISIBLE_IF_KUNIT and EXPORT_SYMBOL_IF_KUNIT is lacking clarity and
missing key steps in the example. This has caused bugs and confusion
among developers.
Improve wording of description and add missing steps to the example.
This entails adding the "#include <kunit/visibility.h>" line and the
"MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);" line. Both of which were
missing from the original example and key to exposing static functions.
Link: https://lore.kernel.org/r/20250516190631.1214081-1-rmoar@google.com
Signed-off-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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The tj_max value obtained from the Intel TCC library are in Celsius,
whereas the thermal subsystem operates in milli-Celsius.
This discrepancy leads to incorrect trip temperature calculations.
Fix bogus trip temperature by converting tj_max to milli-Celsius Unit.
Fixes: 8ef0ca4a177d ("Merge back other thermal control material for 6.3.")
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Reported-by: zhang ning <zhangn1985@outlook.com>
Closes: https://lore.kernel.org/all/TY2PR01MB3786EF0FE24353026293F5ACCD97A@TY2PR01MB3786.jpnprd01.prod.outlook.com/
Tested-by: zhang ning <zhangn1985@outlook.com>
Cc: 6.3+ <stable@vger.kernel.org> # 6.3+
Link: https://patch.msgid.link/20250519070901.1031233-1-rui.zhang@intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/thermal/linux
Merge updates of multiple thermal drivers for 6.16 from Daniel Lezcano:
"- Make the Hisilicon driver to compile by default when ARCH_HISI is
set (Krzysztof Kozlowski)
- Cleanup printk format with use of %pC instead of %pCn in the bcm2835
driver (Luca Ceresoli)
- Fix variable naming coding style in the AmLogic driver (Enrique
Isidoro Vazquez Ramos)
- Fix missing debugfs entry removal on failure by using the devm_
variant in the LVTS driver (AngeloGioacchino Del Regno)
- Remove the unused lvts_debugfs_exit() function as the devm variant
introduced before takes care of removing the debugfs entry in the
LVTS driver (Arnd Bergmann)
- Add the Airoha EN7581 thermal sensor support along with its DT
bindings (Christian Marangi)
- Add ipq5018 compatible string DT binding, cleanup and add its suppot
in the QCom Tsens driver driver (Sricharan Ramabadhran and George
Moussalem)
- Fix comments typos in the Airoha driver (Christian Marangi)"
* tag 'thermal-v6.16-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/thermal/linux:
thermal/drivers/airoha: Fix spelling mistake
thermal/drivers/qcom/tsens: Add support for IPQ5018 tsens
thermal/drivers/qcom/tsens: Add support for tsens v1 without RPM
thermal/drivers/qcom/tsens: Update conditions to strictly evaluate for IP v2+
dt-bindings: thermal: qcom-tsens: Add ipq5018 compatible
thermal/drivers: Add support for Airoha EN7581 thermal sensor
dt-bindings: thermal: Add support for Airoha EN7581 thermal sensor
thermal/drivers/mediatek/lvts: Remove unused lvts_debugfs_exit
thermal/drivers/mediatek/lvts: Fix debugfs unregister on failure
thermal/drivers/amlogic: Rename Uptat to uptat to follow kernel coding style
vsprintf: remove redundant and unused %pCn format specifier
thermal/drivers/bcm2835: Use %pC instead of %pCn
thermal/drivers/hisi: Do not enable by default during compile testing
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Sysfs interface for updating firmware for RMI devices is available even
when F34 probe fails. The code checks for presence of F34 "container"
pointer and then tries to use the function data attached to the
sub-device. F34 assigns the function data early, before it knows if
probe will succeed, leaving behind a stale pointer.
Fix this by expanding checks to not only test for presence of F34
"container" but also check if there is driver data assigned to the
sub-device, and call dev_set_drvdata() only after we are certain that
probe is successful.
This is not a complete fix, since F34 will be freed during firmware
update, so there is still a race when fetching and accessing this
pointer. This race will be addressed in follow-up changes.
Reported-by: Hanno Böck <hanno@hboeck.de>
Fixes: 29fd0ec2bdbe ("Input: synaptics-rmi4 - add support for F34 device reflash")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/aBlAl6sGulam-Qcx@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Merge an update of the Intel int340x thermal driver adding Platform
Temperature Control (PTC) support to it (Srinivas Pandruvada).
* thermal-intel:
thermal: int340x: processor_thermal: Platform temperature control documentation
thermal: intel: int340x: Enable platform temperature control
thermal: intel: int340x: Add platform temperature control interface
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The keyboard is properly initialized by the firmware on Loongson
platform, so full reset of the keyboard is not needed. Switch the
default to avoid performing full reset of the keyboard.
Signed-off-by: Qunqin Zhao <zhaoqunqin@loongson.cn>
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Link: https://lore.kernel.org/r/20250401094154.11527-1-zhaoqunqin@loongson.cn
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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In this driver file, many functions call sub-functions and use ret
to store the error code of the sub-functions.
However, instead of directly returning ret to the caller, they use a
converted error code, which prevents the end-user from clearly
understanding the root cause of the error.
Therefore, the code needs to be modified to directly return the error
code from the sub-functions.
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20250510081155.55840-7-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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If the VF device driver is not loaded in the Guest OS and we attempt to
perform device data migration, the address of the migrated data will
be NULL.
The live migration recovery operation on the destination side will
access a null address value, which will cause access errors.
Therefore, live migration of VMs without added VF device drivers
does not require device data migration.
In addition, when the queue address data obtained by the destination
is empty, device queue recovery processing will not be performed.
Fixes: b0eed085903e ("hisi_acc_vfio_pci: Add support for VFIO live migration")
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20250510081155.55840-6-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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In a live migration scenario. If the number of VFs at the
destination is greater than the source, the recovery operation
will fail and qemu will not be able to complete the process and
exit after shutting down the device FD.
This will cause the driver to be unable to be unloaded normally due
to abnormal reference counting of the live migration driver caused
by the abnormal closing operation of fd.
Therefore, make sure the migration file descriptor references are
always released when the device is closed.
Fixes: b0eed085903e ("hisi_acc_vfio_pci: Add support for VFIO live migration")
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20250510081155.55840-5-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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At present, cache write-back is placed in the device data
copy stage after stopping the device operation.
Writing back to the cache at this stage will cause the data
obtained by the cache to be written back to be empty.
In order to ensure that the cache data is written back
successfully, the data needs to be written back into the
stop device stage.
Fixes: b0eed085903e ("hisi_acc_vfio_pci: Add support for VFIO live migration")
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20250510081155.55840-4-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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In order to ensure that the task packets of the accelerator
device are not lost during the migration process, it is necessary
to send an EQ and AEQ command to the device after the live migration
is completed and to update the completion position of the task queue.
Let the device recheck the completed tasks data and if there are
uncollected packets, device resend a task completion interrupt
to the software.
Fixes: b0eed085903e ("hisi_acc_vfio_pci: Add support for VFIO live migration")
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20250510081155.55840-3-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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The dma addresses of EQE and AEQE are wrong after migration and
results in guest kernel-mode encryption services failure.
Comparing the definition of hardware registers, we found that
there was an error when the data read from the register was
combined into an address. Therefore, the address combination
sequence needs to be corrected.
Even after fixing the above problem, we still have an issue
where the Guest from an old kernel can get migrated to
new kernel and may result in wrong data.
In order to ensure that the address is correct after migration,
if an old magic number is detected, the dma address needs to be
updated.
Fixes: b0eed085903e ("hisi_acc_vfio_pci: Add support for VFIO live migration")
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20250510081155.55840-2-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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VFIO is looking to enable an optimization where it can rely on a fast
unmap operation that returned the size of a larger IOPTE.
Due to how the test was constructed this would only ever succeed on the
AMDv1 page table that supported an 8k contiguous size. Nothing else
supports this.
Alex says the performance win was fairly minor, so lets remove this
code. Always use iommu_iova_to_phys() to extent contiguous pages.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Tested-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/0-v2-97fa1da8d983+412-vfio_fgsp_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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Add a test case to verify x86's bus lock exit functionality, which is now
supported on both Intel and AMD. Trigger bus lock exits by performing a
split-lock access, i.e. an atomic access that splits two cache lines.
Verify that the correct number of bus lock exits are generated, and that
the counter is incremented correctly and at the appropriate time based on
the underlying architecture.
Generate bus locks in both L1 and L2 (if nested virtualization is enabled),
as SVM's functionality in particular requires non-trivial logic to do the
right thing when running nested VMs.
Signed-off-by: Nikunj A Dadhania <nikunj@amd.com>
Co-developed-by: Manali Shukla <manali.shukla@amd.com>
Signed-off-by: Manali Shukla <manali.shukla@amd.com>
Link: https://lore.kernel.org/r/20250502050346.14274-6-manali.shukla@amd.com
Co-developed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
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Add support for KVM_CAP_X86_BUS_LOCK_EXIT on SVM CPUs with Bus Lock
Threshold, which is close enough to VMX's Bus Lock Detection VM-Exit to
allow reusing KVM_CAP_X86_BUS_LOCK_EXIT.
The biggest difference between the two features is that Threshold is
fault-like, whereas Detection is trap-like. To allow the guest to make
forward progress, Threshold provides a per-VMCB counter which is
decremented every time a bus lock occurs, and a VM-Exit is triggered if
and only if the counter is '0'.
To provide Detection-like semantics, initialize the counter to '0', i.e.
exit on every bus lock, and when re-executing the guilty instruction, set
the counter to '1' to effectively step past the instruction.
Note, in the unlikely scenario that re-executing the instruction doesn't
trigger a bus lock, e.g. because the guest has changed memory types or
patched the guilty instruction, the bus lock counter will be left at '1',
i.e. the guest will be able to do a bus lock on a different instruction.
In a perfect world, KVM would ensure the counter is '0' if the guest has
made forward progress, e.g. if RIP has changed. But trying to close that
hole would incur non-trivial complexity, for marginal benefit; the intent
of KVM_CAP_X86_BUS_LOCK_EXIT is to allow userspace rate-limit bus locks,
not to allow for precise detection of problematic guest code. And, it's
simply not feasible to fully close the hole, e.g. if an interrupt arrives
before the original instruction can re-execute, the guest could step past
a different bus lock.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Manali Shukla <manali.shukla@amd.com>
Link: https://lore.kernel.org/r/20250502050346.14274-5-manali.shukla@amd.com
[sean: fix typo in comment]
Signed-off-by: Sean Christopherson <seanjc@google.com>
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During a code review, it is observed that in the scenario
where scan initiation fails, the current code schedules the
ar->scan.timeout workqueue which is not necessary.
In the scan initiation failure scenario, exit the code instead
of scheduling the ar->scan.timeout workqueue.
Compile tested only.
Signed-off-by: Vignesh C <quic_vignc@quicinc.com>
Link: https://patch.msgid.link/20250512065849.2833232-1-quic_vignc@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
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Memory allocated for firmware pdev, vdev and beacon statistics
are not released during rmmod. Below kmemleak trace is seen for this
memory leak:
unreferenced object 0xffff8e76aebdfa00 (size 256):
comm "softirq", pid 0, jiffies 4299272453
hex dump (first 32 bytes):
28 19 71 c3 76 8e ff ff 28 19 71 c3 76 8e ff ff (.q.v...(.q.v...
9f ff ff ff f4 d4 03 00 aa 88 09 00 bd 40 23 00 .............@#.
backtrace (crc dfe1b440):
__kmalloc_cache_noprof+0x2b0/0x370
ath12k_wmi_tlv_fw_stats_data_parse.isra.0+0x44e/0x730 [ath12k]
ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k]
ath12k_update_stats_event+0x85/0x300 [ath12k]
ath12k_wmi_op_rx+0x624/0xd70 [ath12k]
ath12k_htc_rx_completion_handler+0x1f4/0x330 [ath12k]
ath12k_ce_recv_process_cb+0x218/0x300 [ath12k]
ath12k_pci_ce_workqueue+0x1b/0x30 [ath12k]
process_one_work+0x219/0x680
bh_worker+0x198/0x1f0
tasklet_action+0x13/0x30
handle_softirqs+0xca/0x460
__irq_exit_rcu+0xbe/0x110
irq_exit_rcu+0x9/0x30
common_interrupt+0xa7/0xc0
asm_common_interrupt+0x26/0x40
Fix this by calling ath12k_fw_stats_reset() before hardware unregister.
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
Fixes: b8a0d83fe4c7 ("wifi: ath12k: move firmware stats out of debugfs")
Signed-off-by: P Praneesh <praneesh.p@oss.qualcomm.com>
Signed-off-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Link: https://patch.msgid.link/20250507-fw-stats-mem-leak-v1-1-8d4d1d8ec0e8@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
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