Align the bootconfig applied initrd image size to 4. To fill the gap,
the bootconfig command uses null characters in between the bootconfig
data and the footer. This will expands the footer size but don't change
the checksum.
Thus the block image of the initrd file with bootconfig is as follows.
[initrd][bootconfig][(pad)][size][csum]["#BOOTCONFIG\n"]
Link: https://lkml.kernel.org/r/160576522046.320071.8550680670010950634.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Fix to check the write(2) failure including partial write
correctly and try to rollback the partial write, because
if there is no BOOTCONFIG_MAGIC string, we can not remove it.
Link: https://lkml.kernel.org/r/160576521135.320071.3883101436675969998.stgit@devnote2
Fixes: 85c46b78da ("bootconfig: Add bootconfig magic word for indicating bootconfig explicitly")
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Fix not to refer the errno variable as the result of previous libc
functions after printf() because printf() can change the errno.
Link: https://lkml.kernel.org/r/160576520243.320071.51093664672431249.stgit@devnote2
Fixes: 85c46b78da ("bootconfig: Add bootconfig magic word for indicating bootconfig explicitly")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
We've had a number of muxing corner-cases with specific ways to reproduce
them, so let's document them to make sure they aren't lost and introduce
regressions later on.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Tested-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201105135656.383350-6-maxime@cerno.tech
After having written the entire OA buffer with reports, the HW will
write again at the beginning of the OA buffer. It'll indicate it by
setting the WRAP bits in the OASTATUS register.
When a wrap happens and that at the end of the read vfunc we write the
OASTATUS register back to clear the REPORT_LOST bit, we sometimes see
that the OATAILPTR register is reset to a previous position on Gen8/9
(apparently not the case on Gen11+). This leads the next call to the
read vfunc to process reports we've already read. Because we've marked
those as read by clearing the reason & timestamp dwords, they're
discarded and a "Skipping spurious, invalid OA report" message is
emitted.
The workaround to avoid this OATAILPTR value reset seems to be to set
the wrap bits when writing back OASTATUS.
This change has no impact on userspace, it only avoids a bunch of
DRM_NOTE("Skipping spurious, invalid OA report\n") messages.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 19f81df285 ("drm/i915/perf: Add OA unit support for Gen 8+")
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201117130124.829979-1-lionel.g.landwerlin@intel.com
The code that assigns HVS channels during atomic_check is starting to grow
a bit big, let's move it into a separate function.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Tested-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201105135656.383350-5-maxime@cerno.tech
The NUM_CHANNELS define has a pretty generic name and was right before the
function using it. Let's move to something that makes the hardware-specific
nature more obvious, and to a more appropriate place.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Tested-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201105135656.383350-4-maxime@cerno.tech
Even though it was pointed in the review by Daniel, and I thought to have
fixed it while applying the patches, but it turns out I forgot to commit
the fixes in the process. Properly fix it this time.
Fixes: dcda7c28bf ("drm/vc4: kms: Add functions to create the state objects")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201105135656.383350-2-maxime@cerno.tech
The FIFO between the pixelvalve and the HDMI controller runs at 2 pixels
per clock cycle, and cannot deal with odd timings.
Let's reject any mode with such timings.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201029122522.1917579-2-maxime@cerno.tech
The HDMI controller cannot go above a certain pixel rate limit depending on
the generations, but that limit is only enforced in mode_valid at the
moment, which means that we won't advertise modes that exceed that limit,
but the userspace is still free to try to setup a mode that would.
Implement atomic_check to make sure we check it in that scenario too.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201029122522.1917579-1-maxime@cerno.tech
In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly adding multiple break statements instead of
letting the code fall through to the next case, and by replacing a
number of /* fall through */ comments with the new pseudo-keyword
macro fallthrough.
Notice that Clang doesn't recognize /* Fall through */ comments as
implicit fall-through markings.
Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Add remaining PRM instances for the omap5 SoC. Additionally enable the
genpd support for them.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
We can now probe devices with ti-sysc interconnect driver and dts
data. Let's drop the related platform data and custom ti,hwmods
dts property.
Cc: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
We can now probe devices with device tree only configuration using
ti-sysc interconnect target module driver.
Cc: Suman Anna <s-anna@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Add remaining PRM instances for the dra7 SoC. Additionally enable the
genpd support for them.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Similar to what we've done for IPU and DSP let's ignore the status bit
for the IVA clkctrl register.
The clkctrl status won't change unless the related rstctrl is deasserted,
and the rstctrl status won't change unless the clkctrl is enabled.
Cc: linux-clk@vger.kernel.org
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Suman Anna <s-anna@ti.com>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Currently, the SND_SOC_DAPM_STREAM_START event is sent during
pcm_prepare() but the SND_SOC_DAPM_STREAM_STOP event is
sent only in dpcm_fe_dai_shutdown() after soc_pcm_close().
This results in an imbalance between when the DAPM widgets
receive the PRE/POST_PMU/PMD events. So call
snd_soc_dapm_stream_stop() in soc_pcm_hw_clean() before the
snd_soc_pcm_component_hw_free() to keep the stream_stop DAPM
event balanced with the stream_start event in soc_pm_prepare().
Also, in order to prevent duplicate DAPM stream events,
remove the call for DAPM STREAM_START event in dpcm_fe_dai_prepare()
and the call for DAPM STREAM_STOP event in dpcm_fe_dai_shutdown().
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20201117215001.163107-1-ranjani.sridharan@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Part of PCM constraints are set based on DSP topology, but rest
should be set based on hardware capabilities. Add PCM constraints
for Intel platforms:
- Add constraint for the period count to be integer. This avoids
wrap-arounds of the DMA circular buffer in middle of a period.
- Align period size to dword/32bit as per HDA spec.
Both constraints are aligned with current implementation in snd-hda-intel
driver.
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20201118140545.2138895-2-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Current SOF implementation limits period and buffer sizes to multiples
of period_min. Period_min is defined in topology, but is in practise set
to align with the SOF DSP timer tick (typically 1ms).
While this approach helps user-space to avoid period sizes, which are
not aligned to the DSP timer tick, it causes problems to applications
which want to align data processing size to that of ALSA period size.
One example is JACK audio server, which limits period sizes to power of
two values.
Other ALSA drivers where audio data transfer is driven by a timer tick,
like USB, do not constraint period and buffer sizes to exact multiple of
the timer tick.
To align SOF to follow the same behaviour, drop the additional alignment
constraints. As a side-effect, this patch can cause irregularity to
period wakeup timing. This happens when application chooses settings
which were previously forbidden. For example, if application configures
period size to 2^14 bytes and audio config of S32_LE/2ch/48000Hz, one
period represents 42.667ms of audio. Without this patch, this
configuration is not allowed by SOF. With the patch applied,
configuration is allowed but the wakeups are paced by the DSP timer
tick, which is typically 1ms. Application will see period wakeups with a
42/43/42/43ms repeating pattern.
Both approaches are valid within ALSA context, but relaxing the
constraints is better aligned with existing applications and other ALSA
drivers like USB audio.
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20201118140545.2138895-1-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Select WANT_DEV_COREDUMP for catpt driver.
Signed-off-by: Piotr Maziarz <piotrx.maziarz@linux.intel.com>
Signed-off-by: Gustaw Lewandowski <gustaw.lewandowski@linux.intel.com>
--
Changes in v2:
- change should be added to catpt only
Acked-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20201117145223.21222-1-gustaw.lewandowski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
On VF610, mclk0 = bus_clk;
On i.MX6SX/6UL/6ULL/7D, mclk0 = mclk1;
On i.MX7ULP, mclk0 = bus_clk;
On i.MX8QM/8QXP, mclk0 = bus_clk;
On i.MX8MQ/8MN/8MM/8MP, mclk0 = bus_clk;
So add variable mclk0_is_mclk1 in fsl_sai_soc_data to
distinguish these platforms.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Link: https://lore.kernel.org/r/1605768038-4582-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
COMMON_CLK is a user-selectable option with its own dependencies. The
most important dependency is !HAVE_LEGACY_CLK. User-selectable drivers
should not select COMMON_CLK because they will create a dependency cycle
and build failures. For example on MIPS a configuration with COMMON_CLK
(selected by SND_SUN8I_CODEC) and HAVE_LEGACY_CLK (selected by
SOC_RT305X) is possible:
WARNING: unmet direct dependencies detected for COMMON_CLK
Depends on [n]: !HAVE_LEGACY_CLK [=y]
Selected by [y]:
- SND_SUN8I_CODEC [=y] && SOUND [=y] && !UML && SND [=y] && SND_SOC [=y] &&
(ARCH_SUNXI || COMPILE_TEST [=y]) && OF [=y] && (MACH_SUN8I || ARM64 && ARCH_SUNXI || COMPILE_TEST [=y])
/usr/bin/mips-linux-gnu-ld: drivers/clk/clk.o: in function `clk_set_rate':
(.text+0xaeb4): multiple definition of `clk_set_rate'; arch/mips/ralink/clk.o:(.text+0x88): first defined here
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20201118201420.4878-1-krzk@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
For some reason this ops is missing in 2 out of the 3 broadwell
drivers. Add to make sure ASoC takes care of power management.
Tested-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20201112223825.39765-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
For some reason this ops is missing in 2 out of the 3 broadwell
drivers. Add to make sure ASoC takes care of power management.
Tested-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20201112223825.39765-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add dapm widgets and routes for this codec.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20201105113458.12360-7-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Qualcomm LPASS (Low Power Audio SubSystem) has internal codec
VA macro block which is used for connecting with DMICs.
This patch adds support to the codec part of the VA Macro block
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20201105113458.12360-6-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This binding is for LPASS has internal codec VA macro which is
for connecting with DMICs.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20201105113458.12360-5-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch adds dapm widgets and routes on this codec
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20201105113458.12360-4-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Qualcomm LPASS (Low Power Audio SubSystem) has internal codec
WSA macro block which is used for connecting with WSA Smart
speakers over soundwire.
This patch adds support to the codec part of the WSA Macro block.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20201105113458.12360-3-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This binding is for LPASS has internal codec WSA macro which is
for connecting with WSA Smart speakers.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20201105113458.12360-2-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
The HP Pavilion x2 Detachable line comes in many variants:
1. Bay Trail SoC + AXP288 PMIC, Micro-USB charging (10-k010nz, ...)
DMI_SYS_VENDOR: "Hewlett-Packard"
DMI_PRODUCT_NAME: "HP Pavilion x2 Detachable PC 10"
DMI_BOARD_NAME: "8021"
2. Bay Trail SoC + AXP288 PMIC, Type-C charging (10-n000nd, 10-n010nl, ...)
DMI_SYS_VENDOR: "Hewlett-Packard"
DMI_PRODUCT_NAME: "HP Pavilion x2 Detachable"
DMI_BOARD_NAME: "815D"
3. Cherry Trail SoC + AXP288 PMIC, Type-C charging (10-n101ng, ...)
DMI_SYS_VENDOR: "HP"
DMI_PRODUCT_NAME: "HP Pavilion x2 Detachable"
DMI_BOARD_NAME: "813E"
4. Cherry Trail SoC + TI PMIC, Type-C charging (10-p002nd, 10-p018wm, ...)
DMI_SYS_VENDOR: "HP"
DMI_PRODUCT_NAME: "HP x2 Detachable 10-p0XX"
DMI_BOARD_NAME: "827C"
5. Cherry Trail SoC + TI PMIC, Type-C charging (x2-210-g2, ...)
DMI_SYS_VENDOR: "HP"
DMI_PRODUCT_NAME: "HP x2 210 G2"
DMI_BOARD_NAME: "82F4"
Variant 1 needs the exact same quirk as variant 2, so relax the DMI check
for the existing quirk a bit so that it matches both variant 1 and 2
(note the other variants will still not match).
Variant 2 already has an existing quirk (which now also matches variant 1)
Variant 3 uses a cx2072x codec, so is not applicable here.
Variant 4 almost works with the defaults, but it also needs a quirk to
fix jack-detection, add a new quirk for this.
Variant 5 does use a RT5640 codec (based on old dmesg output), but was
otherwise not tested, keep using the defaults for this variant.
Fixes: ec8e8418ff ("ASoC: Intel: bytcr_rt5640: Add quirks for various devices")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20201118121515.11441-1-hdegoede@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>
pseries|pnv_setup_rfi_flush already does the count cache flush setup, and
we just added entry and uaccess flushes. So the name is not very accurate
any more. In both platforms we then also immediately setup the STF flush.
Rename them to _setup_security_mitigations and fold the STF flush in.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
For simplicity in backporting, the original entry_flush test contained
a lot of duplicated code from the rfi_flush test. De-duplicate that code.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Add a test modelled on the RFI flush test which counts the number
of L1D misses doing a simple syscall with the entry flush on and off.
For simplicity of backporting, this test duplicates a lot of code from
rfi_flush. We clean that up in the next patch.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
In kup.h we currently include kup-radix.h for all 64-bit builds, which
includes Book3S and Book3E. The latter doesn't make sense, Book3E
never uses the Radix MMU.
This has worked up until now, but almost by accident, and the recent
uaccess flush changes introduced a build breakage on Book3E because of
the bad structure of the code.
So disentangle things so that we only use kup-radix.h for Book3S. This
requires some more stubs in kup.h and fixing an include in
syscall_64.c.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
IBM Power9 processors can speculatively operate on data in the L1 cache
before it has been completely validated, via a way-prediction mechanism. It
is not possible for an attacker to determine the contents of impermissible
memory using this method, since these systems implement a combination of
hardware and software security measures to prevent scenarios where
protected data could be leaked.
However these measures don't address the scenario where an attacker induces
the operating system to speculatively execute instructions using data that
the attacker controls. This can be used for example to speculatively bypass
"kernel user access prevention" techniques, as discovered by Anthony
Steinhauser of Google's Safeside Project. This is not an attack by itself,
but there is a possibility it could be used in conjunction with
side-channels or other weaknesses in the privileged code to construct an
attack.
This issue can be mitigated by flushing the L1 cache between privilege
boundaries of concern. This patch flushes the L1 cache after user accesses.
This is part of the fix for CVE-2020-4788.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
IBM Power9 processors can speculatively operate on data in the L1 cache
before it has been completely validated, via a way-prediction mechanism. It
is not possible for an attacker to determine the contents of impermissible
memory using this method, since these systems implement a combination of
hardware and software security measures to prevent scenarios where
protected data could be leaked.
However these measures don't address the scenario where an attacker induces
the operating system to speculatively execute instructions using data that
the attacker controls. This can be used for example to speculatively bypass
"kernel user access prevention" techniques, as discovered by Anthony
Steinhauser of Google's Safeside Project. This is not an attack by itself,
but there is a possibility it could be used in conjunction with
side-channels or other weaknesses in the privileged code to construct an
attack.
This issue can be mitigated by flushing the L1 cache between privilege
boundaries of concern. This patch flushes the L1 cache on kernel entry.
This is part of the fix for CVE-2020-4788.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
We are about to add an entry flush. The rfi (exit) flush test measures
the number of L1D flushes over a syscall with the RFI flush enabled and
disabled. But if the entry flush is also enabled, the effect of enabling
and disabling the RFI flush is masked.
If there is a debugfs entry for the entry flush, disable it during the RFI
flush and restore it later.
Reported-by: Spoorthy S <spoorts2@in.ibm.com>
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
while running ipmi, ipmi_smi_watcher_register() caused
a suspicious RCU usage warning.
-----
=============================
WARNING: suspicious RCU usage
5.10.0-rc3+ #1 Not tainted
-----------------------------
drivers/char/ipmi/ipmi_msghandler.c:750 RCU-list traversed in non-reader section!!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
2 locks held by syz-executor.0/4254:
stack backtrace:
CPU: 0 PID: 4254 Comm: syz-executor.0 Not tainted 5.10.0-rc3+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1 04/ 01/2014
Call Trace:
dump_stack+0x19d/0x200
ipmi_smi_watcher_register+0x2d3/0x340 [ipmi_msghandler]
acpi_ipmi_init+0xb1/0x1000 [acpi_ipmi]
do_one_initcall+0x149/0x7e0
do_init_module+0x1ef/0x700
load_module+0x3467/0x4140
__do_sys_finit_module+0x10d/0x1a0
do_syscall_64+0x34/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x468ded
-----
It is safe because smi_watchers_mutex is locked and srcu_read_lock
has been used, so simply pass lockdep_is_held() to the
list_for_each_entry_rcu() to suppress this warning.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Message-Id: <20201119070839.381-1-miaoqinglang@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
This needs to call of_node_put(np) before returning if of_iomap() fails.
Fixes: e0218dca57 ("soc: aspeed: Add soc info driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/20201113100850.GA168908@mwanda
Signed-off-by: Joel Stanley <joel@jms.id.au>
As the user manual and code comment said, Loongson-3 has 4-scache banks,
while Loongson-2K has only 2 banks, so we should multiply the number of
scache banks, this multiply operation should be done by c->scache.sets
instead of scache_size, otherwise we will get the wrong scache size when
execute lscpu. For example, the scache size should be 8192K instead of
2048K on the Loongson 3A3000 and 3A4000 platform, we can see the related
info in the following boot message:
[loongson@linux ~]$ dmesg | grep "Unified secondary cache"
[ 0.000000] Unified secondary cache 8192kB 16-way, linesize 64 bytes.
[ 4.061909] Unified secondary cache 8192kB 16-way, linesize 64 bytes.
[ 4.125629] Unified secondary cache 8192kB 16-way, linesize 64 bytes.
[ 4.188379] Unified secondary cache 8192kB 16-way, linesize 64 bytes.
E.g. without this patch:
[loongson@linux ~]$ cat /sys/devices/system/cpu/cpu*/cache/index2/size
2048K
2048K
2048K
2048K
[loongson@linux ~]$ lscpu | grep "L2 cache"
L2 cache: 2048K
With this patch:
[loongson@linux ~]$ cat /sys/devices/system/cpu/cpu*/cache/index2/size
8192K
8192K
8192K
8192K
[loongson@linux ~]$ lscpu | grep "L2 cache"
L2 cache: 8192K
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Since commit 02cf211968 ("Cleanup the mess in cpu_cache_init."),
cpu_has_6k_cache and cpu_has_8k_cache have no user, r6k_cache_init()
and r8k_cache_init() are not defined for over 15 years, just remove
them.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
