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932,869 commits

Author SHA1 Message Date
Kai-Heng Feng
50f0bf550f ALSA: hda: Use dev_to_hdac_dev macro
Use dev_to_hdac_dev() instead of container_of().

No functional change intended.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20200505030357.28004-1-kai.heng.feng@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-05-05 08:58:35 +02:00
Eddie James
f9950ad272 ARM: dts: aspeed: ast2600: Add SCU interrupt controllers
Add nodes for the interrupt controllers provided by the SCU.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
2020-05-05 15:35:51 +09:30
Eddie James
d1f3f68f55 ARM: dts: aspeed: ast2500: Add SCU interrupt controller
Add a node for the interrupt controller provided by the SCU.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
2020-05-05 15:35:43 +09:30
Wesley Cheng
78c2aac2a0 phy: qcom-qmp: Rename UFS PCS QMP v4 registers
The UFS QMP v4 PHY has a largely different register set versus USB and
PCIe.  Rename the register offsets to denote that the value is specific for
the UFS PCS register.

Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Link: https://lore.kernel.org/r/1588636467-23409-6-git-send-email-wcheng@codeaurora.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-05-05 10:44:04 +05:30
Wesley Cheng
e4d8b05ad5 phy: qcom-qmp: Use proper PWRDOWN offset for sm8150 USB
The register map for SM8150 QMP USB SSPHY has moved
QPHY_POWER_DOWN_CONTROL to a different offset.  Allow for
an offset in the register table to override default value
if it is a DP capable PHY.

Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Reviewed-by: Manu Gautam <mgautam@codeaurora.org>
Link: https://lore.kernel.org/r/1588636467-23409-5-git-send-email-wcheng@codeaurora.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-05-05 10:44:04 +05:30
Jack Pham
9a24b929d3 phy: qcom-qmp: Add SM8150 QMP USB3 PHY support
Add support for SM8150 QMP USB3 PHY with the necessary
initialization sequences as well as additional QMP V4
register definitions.

Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Reviewed-by: Manu Gautam <mgautam@codeaurora.org>
Link: https://lore.kernel.org/r/1588636467-23409-4-git-send-email-wcheng@codeaurora.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-05-05 10:44:04 +05:30
Wesley Cheng
51e8114f80 phy: qcom-snps: Add SNPS USB PHY driver for QCOM based SOCs
This adds the SNPS FemtoPHY V2 driver used in QCOM SOCs.  There
are potentially multiple instances of this UTMI PHY on the
SOC, all which can utilize this driver.  The V2 driver will
have a different register map compared to V1.

Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Reviewed-by: Philipp Zabel <pza@pengutronix.de>
Reviewed-by: Manu Gautam <mgautam@codeaurora.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/1588636467-23409-3-git-send-email-wcheng@codeaurora.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-05-05 10:44:04 +05:30
Wesley Cheng
f06b9fc9a8 dt-bindings: phy: Add binding for qcom,usb-snps-femto-v2
This binding shows the descriptions and properties for the
Synopsis Femto USB PHY V2 used on QCOM platforms.

Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/1588636467-23409-2-git-send-email-wcheng@codeaurora.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-05-05 10:44:04 +05:30
Damien Le Moal
64e14ece07 scsi: scsi_debug: Implement ZBC host-aware emulation
Implement ZBC host-aware device model emulation. The main changes from the
host-managed emulation are the device type (TYPE_DISK is used), relaxation
of access checks for read and write operations and different handling of a
sequential write preferred zone write pointer as mandated by the ZBC r05
specifications.

To facilitate the implementation and avoid a lot of "if" statement, the
zmodel field is added to the device information and the z_type field to the
zone state data structure.

Link: https://lore.kernel.org/r/20200422104221.378203-8-damien.lemoal@wdc.com
Tested-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-05 00:37:34 -04:00
Damien Le Moal
98e0a68986 scsi: scsi_debug: Add zone_size_mb module parameter
Add the zone_size_mb module parameters to control the zone size of a ZBC
device. If the zone size specified is not a divisor of the device capacity,
the last zone of the device will be created as a smaller "runt" zone. This
parameter is ignored for device types other than 0x14 (zbc=2 case).

Note: for testing purposes, zone sizes that are not a power of 2 are
accepted but will result in the drive being rejected by the sd driver.

Link: https://lore.kernel.org/r/20200422104221.378203-7-damien.lemoal@wdc.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-05 00:37:33 -04:00
Damien Le Moal
aa8fecf96b scsi: scsi_debug: Add zone_nr_conv module parameter
Allow controlling the number of conventional zones of a ZBC device with the
new zone_nr_conv module parameter. The default value is 1 and the specified
value must be less than the total number of zones of the device. This
parameter is ignored for device types other than 0x14 (zbc=2 case).

Link: https://lore.kernel.org/r/20200422104221.378203-6-damien.lemoal@wdc.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-05 00:37:32 -04:00
Damien Le Moal
380603a5bb scsi: scsi_debug: Add zone_max_open module parameter
Add the zone_max_open module parameters to control the maximum number of
open zones of a ZBC device. This parameter is ignored for device types
other than 0x14 (zbc=2 case).

Link: https://lore.kernel.org/r/20200422104221.378203-5-damien.lemoal@wdc.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-05 00:37:32 -04:00
Douglas Gilbert
9267e0eb41 scsi: scsi_debug: Add ZBC module parameter
Add the zbc module parameter to take either:
    0: none         (probably a conventional disk)
    1: host-aware
    2: host-managed

These values are chosen to match 'enum blk_zoned_model' found in
include/linux/blkdev.h . Instead of "none", "no" or "0" can be given.
Instead of "host-aware", "aware or "1" can be given. Instead of
"host-managed", "managed" or "2" can be given.

Note: the zbc parameter can only be given at driver/module load time; it
cannot be changed via sysfs thereafter.

At this time there is no ZBC "host-aware" implementation so that string (or
the value '1') results in a modprobe error.

Link: https://lore.kernel.org/r/20200422104221.378203-4-damien.lemoal@wdc.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-05 00:37:31 -04:00
Douglas Gilbert
f0d1cf9378 scsi: scsi_debug: Add ZBC zone commands
Add support for the 5 ZBC commands and enough functionality to emulate a
host-managed device with one conventional zone and a set of sequential
write-required zones up to the disk capacity.

Link: https://lore.kernel.org/r/20200422104221.378203-3-damien.lemoal@wdc.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-05 00:37:30 -04:00
Douglas Gilbert
d36da3058c scsi: scsi_debug: Add ZBC mode and VPD pages
The ZBC standard "piggy-backs" on many, but not all, of the facilities in
SBC. Add those ZBC mode pages (plus mode parameter block descriptors
(e.g. "WP")) and VPD pages in common with SBC. Add ZBC specific VPD page
for the host-managed ZBC device type (ptype=0x14).

Link: https://lore.kernel.org/r/20200422104221.378203-2-damien.lemoal@wdc.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-05 00:37:29 -04:00
Pierre-Louis Bossart
f48f4fd9fe soundwire: bus: reduce verbosity on enumeration
No need to repeat the same info log on all enumerations (essentially
each power-up), keep it as debug information.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200419185117.4233-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-05-05 08:51:44 +05:30
Pierre-Louis Bossart
88ac86f252 soundwire: debugfs: clarify SDPX license with GPL-2.0-only
Follow recommendation to use GPL-2.0-only

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20200419185117.4233-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-05-05 08:51:44 +05:30
Pierre-Louis Bossart
8893ab5e8e soundwire: slave: don't init debugfs on device registration error
The error handling flow seems incorrect, there is no reason to try and
add debugfs support if the device registration did not
succeed. Return on error.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20200419185117.4233-2-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-05-05 08:51:44 +05:30
Pierre-Louis Bossart
01de995075 Documentation: SoundWire: clarify TDM mode support
The current description of stream topologies does not explicitly
mention 'mirror' topologies used for audio amplifiers, where all
amplifiers see the same data and generate a different output based on
configuration or dynamic information. Add examples and notes to
explain how channels can be transmitted and mapped.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200419185117.4233-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-05-05 08:51:44 +05:30
Pierre-Louis Bossart
91b5cfc020 soundwire: qcom: fix error handling in probe
Make sure all error cases are properly handled and all resources freed.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200429185057.12810-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-05-05 08:51:44 +05:30
Douglas Gilbert
48e3bf1631 scsi: scsi_debug: Bump to version 1.89
The scsi_debug driver version is visible in:

   /sys/modules/scsi_debug/version

and can thus be used by user space programs to alter the features they try
to use. Since the per_host_store and zbc/zone options are significant
additions, bump the version number to 1.89 .

Link: https://lore.kernel.org/r/20200421151424.32668-9-dgilbert@interlog.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-04 23:07:36 -04:00
Douglas Gilbert
5d80707673 scsi: scsi_debug: Re-arrange parameters alphabetically
This module has a lot of parameters and when searching for one, the author
prefers them in alphabetical order. This can lead to somewhat illogical
ordering (e.g. inq_product before inq_vendor). However it is not clear what
another sensible total logical ordering would be.

Link: https://lore.kernel.org/r/20200421151424.32668-8-dgilbert@interlog.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-04 23:07:18 -04:00
Douglas Gilbert
ed9f3e2513 scsi: scsi_debug: Implement PRE-FETCH commands
Many disks implement the SCSI PRE-FETCH commands. One use case might be a
disk-to-disk compare, say between disks A and B. Then this sequence of
commands might be used: PRE-FETCH(from B, IMMED), READ(from A), VERIFY
(BYTCHK=1 on B with data returned from READ).  The PRE-FETCH (which returns
quickly due to the IMMED) fetches the data from the media into B's cache
which should speed the trailing VERIFY command. The next chunk of the
compare might be done in parallel, with A and B reversed.

The implementation tries to bring the specified range in main memory into
the cache(s) associated with this machine's CPU(s) using the
prefetch_range() function.

Link: https://lore.kernel.org/r/20200421151424.32668-7-dgilbert@interlog.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-04 23:06:44 -04:00
Douglas Gilbert
a2aede970a scsi: scsi_debug: Improve command duration calculation
Previously the code did the work implied by the given SCSI command and
after that it waited for a timer based on the user specified command
duration to be exhausted before informing the mid-level that the command
was complete. For short command durations, the time to complete the work
implied by the SCSI command could be significant compared to the user
specified command duration.

For example a WRITE of 128 blocks (say 512 bytes each) on a machine that
can copy from main memory to main memory at a rate of 10 GB/sec will take
around 6.4 microseconds to do that copy.  If the user specified a command
duration of 5 microseconds (ndelay=5000), should the driver do a further
delay of 5 microseconds after the copy or return immediately because 6.4 >
5 ?

The action prior to this patch was to always do the timer based
delay. After this patch, for ndelay values less than 1 millisecond, this
driver will complete the command immediately.  And in the case where the
user specified delay was 7 microseconds, a timer delay of 600 nanoseconds
will be set ((7 - 6.4) * 1000).

Link: https://lore.kernel.org/r/20200421151424.32668-6-dgilbert@interlog.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-04 23:06:20 -04:00
Douglas Gilbert
67da413f26 scsi: scsi_debug: Weaken rwlock around ramdisk access
The design of this driver is to do any ramdisk access on the same thread
that invoked the queuecommand() call. That is assumed to be user space
context. The command duration is implemented by setting the delay with a
high resolution timer. The hr timer's callback may well be in interrupt
context, but it doesn't touch the ramdisk. So try removing the
_irqsave()/_irqrestore() portion on the read-write lock that protects
ramdisk access.

Link: https://lore.kernel.org/r/20200421151424.32668-5-dgilbert@interlog.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-04 23:06:07 -04:00
Douglas Gilbert
c3e2fe9222 scsi: scsi_debug: Implement VERIFY(10), add VERIFY(16)
With the addition of the per_host_store option, the ability to check
whether two different ramdisk images are the same or not becomes
practical. Prior to this patch VERIFY(10) always returned true (i.e.  the
SCSI GOOD status) without checking. This option adds support for BYTCHK
equal to 0, 1 and 3. If the comparison fails, then a sense key of
MISCOMPARE is returned as per the T10 standards. Also add support for the
VERIFY(16) command.

Link: https://lore.kernel.org/r/20200421151424.32668-4-dgilbert@interlog.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-04 23:05:44 -04:00
Douglas Gilbert
87c715dcde scsi: scsi_debug: Add per_host_store option
The scsi_debug driver has always been restricted to using one ramdisk image
(or none) for its storage. This means that thousands of scsi_debug devices
can be created without exhausting the host machine's RAM. The downside is
that all scsi_debug devices share the same ramdisk image. This option
changes the way a following write to the add_host parameter (or an add_host
in the module/driver invocation) operates.  For each new host that is
created while per_host_store is true, a new store (of dev-size_mb MiB) is
created and associated with all the LUs that belong to that new host. The
user (who will need root permissions) needs to take care not to exhaust all
the machine's available RAM.

One reason for doing this is to check that (partial) disk to disk copies
based on scsi_debug devices have actually copied accurately. To test this
the add_host=<n> parameter where <n> is 2 or greater can be used when the
scsi_debug module is loaded. Let us assume that /dev/sdb and /dev/sg1 are
the same scsi_debug device, while /dev/sdc and /dev/sg2 are the same
scsi_debug device. With per_host_store=1 add_host=2 they will have
different ramdisk images. Then the following pseudocode could be executed
to check if the sgh_dd copy worked:

    dd if=/dev/urandom of=/dev/sdb
    sgh_dd if=/dev/sg1 of=/dev/sg2 [plus option(s) to test]
    cmp /dev/sdb /dev/sdc

If the cmp fails then the copy has failed (or some other mechanism wrote to
/dev/sdb or /dev/sdc in the interim).

[mkp: use kstrtobool()]

Link: https://lore.kernel.org/r/20200421151424.32668-3-dgilbert@interlog.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-04 23:05:33 -04:00
Douglas Gilbert
0c4bc91d66 scsi: scsi_debug: Randomize command completion time
Add a new command line option (e.g. random=1) and sysfs attribute that
causes subsequent command completion times to be between the current
command delay setting and 0. A uniformly distributed 32 bit, kernel
provided integer is used for this purpose.

Since the existing 'delay' whose units are jiffies (typically milliseconds)
and 'ndelay' (units: nanoseconds) options (and sysfs attributes) span a
range greater than 32 bits, some scaling is required.

The purpose of this patch is to widen the range of testing cases that are
visited in long running tests. Put simply: rarely struct race conditions
are more likely to be found when this facility is used.

The default is the previous case in which all command completions were
roughly equal to (if not, slightly longer) than the value given by the
'delay' or 'ndelay' settings (or their defaults).  This option's default is
equivalent to setting 'random=0' .

[mkp: use kstrtobool()]

Link: https://lore.kernel.org/r/20200421151424.32668-2-dgilbert@interlog.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-05-04 23:05:21 -04:00
Linus Torvalds
47cf1b422e Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid
Pull HID fixes from Jiri Kosina:

 - Wacom driver functional and regression fixes from Jason Gerecke

 - race condition fix in usbhid, found by syzbot and fixed by Alan Stern

 - a few device-specific quirks and ID additions

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
  HID: quirks: Add HID_QUIRK_NO_INIT_REPORTS quirk for Dell K12A keyboard-dock
  HID: mcp2221: add gpiolib dependency
  HID: i2c-hid: reset Synaptics SYNA2393 on resume
  HID: wacom: Report 2nd-gen Intuos Pro S center button status over BT
  HID: usbhid: Fix race between usbhid_close() and usbhid_stop()
  Revert "HID: wacom: generic: read the number of expected touches on a per collection basis"
  HID: alps: ALPS_1657 is too specific; use U1_UNICORN_LEGACY instead
  HID: alps: Add AUI1657 device ID
  HID: logitech: Add support for Logitech G11 extra keys
  HID: multitouch: add eGalaxTouch P80H84 support
  HID: wacom: Read HID_DG_CONTACTMAX directly for non-generic devices
2020-05-04 18:55:20 -07:00
Mauro Carvalho Chehab
e7728fcf7d docs: dt: convert writing-bindings.txt to ReST
- Add a SPDX header;
- Adjust document and section titles;
- Mark literal blocks as such;
- Add it to bindings/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 17:09:53 -05:00
Mauro Carvalho Chehab
858e684565 docs: dt: convert submitting-patches.txt to ReST format
- Add a SPDX header;
- Adjust document and section titles;
- Mark literal blocks as such;
- Add it to bindings/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 17:09:53 -05:00
Mauro Carvalho Chehab
56516a9fe1 docs: dt: convert ABI.txt to ReST format
This file only requires a properly-formatted title to be
recognized as a ReST file.

As there will be more files under bindings/ that will be
included at the documentation body, add a new index.rst
file there.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 17:09:52 -05:00
Mauro Carvalho Chehab
642e6e5ce0 docs: dt: convert overlay-notes.txt to ReST format
- Add a SPDX header;
- Adjust document title;
- Some whitespace fixes and new line breaks;
- Mark literal blocks as such;
- Add it to devicetree/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 17:09:52 -05:00
Mauro Carvalho Chehab
218e1b3d10 docs: dt: convert of_unittest.txt to ReST
- Add a SPDX header;
- Adjust document and section titles;
- Adjust numerated list markups;
- Some whitespace fixes and new line breaks;
- Mark literal blocks as such;
- Add it to devicetree/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 17:09:52 -05:00
Mauro Carvalho Chehab
26853a2420 docs: dt: convert dynamic-resolution-notes.txt to ReST
- Add a SPDX header;
- Adjust document title;
- Add it to devicetree/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 17:09:52 -05:00
Mauro Carvalho Chehab
afb6120519 docs: dt: convert changesets to ReST
- Add a SPDX header;
- Add a document title;
- Some whitespace fixes and new line breaks;
- Add it to devicetree/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 17:09:46 -05:00
Zong Li
d6d5161280
riscv: force __cpu_up_ variables to put in data section
Put __cpu_up_stack_pointer and __cpu_up_task_pointer in data section.
Currently, these two variables are put in bss section, there is a
potential risk that secondary harts get the uninitialized value before
main hart finishing the bss clearing. In this case, all secondary
harts would pass the waiting loop and enable the MMU before main hart
set up the page table.

This issue happens on random booting of multiple harts, which means
it will manifest for BBL and OpenSBI v0.6 (or older version). In OpenSBI
v0.7 (or higher version), we have HSM extension so all the secondary harts
are brought-up by Linux kernel in an orderly fashion. This means we don't
need this change for OpenSBI v0.7 (or higher version).

Signed-off-by: Zong Li <zong.li@sifive.com>
Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-05-04 15:03:25 -07:00
Mauro Carvalho Chehab
b91a770a69 docs: dt: usage_model.rst: fix link for DT usage
The devicetree.org doesn't host the Device_Tree_Usage page
anymore. So, fix the link to point to a new address.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 16:22:54 -05:00
Andreas Schwab
0a9f2a6161
riscv: add Linux note to vdso
The Linux note in the vdso allows glibc to check the running kernel
version without having to issue the uname syscall.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-05-04 14:22:34 -07:00
Mauro Carvalho Chehab
d8e81bc3e8 docs: dt: convert usage-model.txt to ReST
- Add a SPDX header;
- Adjust document title;
- Use footnoote markups;
- Some whitespace fixes and new line breaks;
- Mark literal blocks as such;
- Add it to devicetree/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 16:22:11 -05:00
Mauro Carvalho Chehab
4ef7f57ebe docs: dt: add an index.rst file for devicetree
There are some device tree documentation under
Documentation/devicetree. Add a top index file for it and
add the already-existing ReST file on it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 16:21:41 -05:00
Vincent Chen
c749bb2d55
riscv: set max_pfn to the PFN of the last page
The current max_pfn equals to zero. In this case, I found it caused users
cannot get some page information through /proc such as kpagecount in v5.6
kernel because of new sanity checks. The following message is displayed by
stress-ng test suite with the command "stress-ng --verbose --physpage 1 -t
1" on HiFive unleashed board.

 # stress-ng --verbose --physpage 1 -t 1
 stress-ng: debug: [109] 4 processors online, 4 processors configured
 stress-ng: info: [109] dispatching hogs: 1 physpage
 stress-ng: debug: [109] cache allocate: reducing cache level from L3 (too high) to L0
 stress-ng: debug: [109] get_cpu_cache: invalid cache_level: 0
 stress-ng: info: [109] cache allocate: using built-in defaults as no suitable cache found
 stress-ng: debug: [109] cache allocate: default cache size: 2048K
 stress-ng: debug: [109] starting stressors
 stress-ng: debug: [109] 1 stressor spawned
 stress-ng: debug: [110] stress-ng-physpage: started [110] (instance 0)
 stress-ng: error: [110] stress-ng-physpage: cannot read page count for address 0x3fd34de000 in /proc/kpagecount, errno=0 (Success)
 stress-ng: error: [110] stress-ng-physpage: cannot read page count for address 0x3fd32db078 in /proc/kpagecount, errno=0 (Success)
 ...
 stress-ng: error: [110] stress-ng-physpage: cannot read page count for address 0x3fd32db078 in /proc/kpagecount, errno=0 (Success)
 stress-ng: debug: [110] stress-ng-physpage: exited [110] (instance 0)
 stress-ng: debug: [109] process [110] terminated
 stress-ng: info: [109] successful run completed in 1.00s
 #

After applying this patch, the kernel can pass the test.

 # stress-ng --verbose --physpage 1 -t 1
 stress-ng: debug: [104] 4 processors online, 4 processors configured stress-ng: info: [104] dispatching hogs: 1 physpage
 stress-ng: info: [104] cache allocate: using defaults, can't determine cache details from sysfs
 stress-ng: debug: [104] cache allocate: default cache size: 2048K
 stress-ng: debug: [104] starting stressors
 stress-ng: debug: [104] 1 stressor spawned
 stress-ng: debug: [105] stress-ng-physpage: started [105] (instance 0) stress-ng: debug: [105] stress-ng-physpage: exited [105] (instance 0) stress-ng: debug: [104] process [105] terminated
 stress-ng: info: [104] successful run completed in 1.01s
 #

Cc: stable@vger.kernel.org
Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Yash Shah <yash.shah@sifive.com>
Tested-by: Yash Shah <yash.shah@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-05-04 14:12:32 -07:00
Anup Patel
a2da5b181f
RISC-V: Remove N-extension related defines
The RISC-V N-extension is still in draft state hence remove
N-extension related defines from asm/csr.h.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-05-04 14:09:00 -07:00
Anup Patel
6bcff51539
RISC-V: Add bitmap reprensenting ISA features common across CPUs
This patch adds riscv_isa bitmap which represents Host ISA features
common across all Host CPUs. The riscv_isa is not same as elf_hwcap
because elf_hwcap will only have ISA features relevant for user-space
apps whereas riscv_isa will have ISA features relevant to both kernel
and user-space apps.

One of the use-case for riscv_isa bitmap is in KVM hypervisor where
we will use it to do following operations:

1. Check whether hypervisor extension is available
2. Find ISA features that need to be virtualized (e.g. floating
   point support, vector extension, etc.)

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-05-04 14:08:59 -07:00
Anup Patel
7391efa48d
RISC-V: Export riscv_cpuid_to_hartid_mask() API
The riscv_cpuid_to_hartid_mask() API should be exported to allow
building KVM RISC-V as loadable module.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-05-04 14:08:58 -07:00
Enric Balletbo i Serra
bbb7ad49b8
platform/chrome: cros_usbpd_logger: Add __printf annotation to append_str()
This allows the compiler to verify the format strings vs the types of
the arguments. Also, silence the warning (triggered by W=1):

  cros_usbpd_logger.c:55:2: warning: function ‘append_str’ might be a
  candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
2020-05-04 14:02:01 -07:00
Enric Balletbo i Serra
c032699ef9
platform/chrome: cros_ec_i2c: Appease the kernel-doc deity
Replace a comment starting with /** by simply /* to avoid having
it interpreted as a kernel-doc comment.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
2020-05-04 14:01:45 -07:00
Frank Rowand
9ae8578b51 of: Documentation: change overlay example to use current syntax
The overlay implementation details in the compiled (DTB) file are
now properly implemented by the dtc compiler and should no longer
be hard coded in the source file.

Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-05-04 15:56:36 -05:00
Magnus Karlsson
07bf2d97d1 xsk: Remove unnecessary member in xdp_umem
Remove the unnecessary member of address in struct xdp_umem as it is
only used during the umem registration. No need to carry this around
as it is not used during run-time nor when unregistering the umem.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Link: https://lore.kernel.org/bpf/1588599232-24897-3-git-send-email-magnus.karlsson@intel.com
2020-05-04 22:56:26 +02:00
Magnus Karlsson
e4e5aefc11 xsk: Change two variable names for increased clarity
Change two variables names so that it is clearer what they
represent. The first one is xsk_list that in fact only contains the
list of AF_XDP sockets with a Tx component. Change this to xsk_tx_list
for improved clarity. The second variable is size in the ring
structure. One might think that this is the size of the ring, but it
is in fact the size of the umem, copied into the ring structure to
improve performance. Rename this variable umem_size to avoid any
confusion.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Link: https://lore.kernel.org/bpf/1588599232-24897-2-git-send-email-magnus.karlsson@intel.com
2020-05-04 22:56:26 +02:00