Commit graph

996159 commits

Author SHA1 Message Date
Björn Töpel
4896d7e37e selftests/bpf: Remove memory leak
The allocated entry is immediately overwritten by an assignment. Fix
that.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210122154725.22140-5-bjorn.topel@gmail.com
2021-01-26 00:05:01 +01:00
Björn Töpel
a86072838b selftests/bpf: Fix style warnings
Silence three checkpatch style warnings.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210122154725.22140-4-bjorn.topel@gmail.com
2021-01-26 00:05:01 +01:00
Björn Töpel
449f0874fd selftests/bpf: Remove unused enums
The enums undef and bidi are not used. Remove them.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210122154725.22140-3-bjorn.topel@gmail.com
2021-01-26 00:05:01 +01:00
Björn Töpel
7140ef1400 selftests/bpf: Remove a lot of ifobject casting
Instead of passing void * all over the place, let us pass the actual
type (ifobject) and remove the void-ptr-to-type-ptr casting.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210122154725.22140-2-bjorn.topel@gmail.com
2021-01-26 00:05:01 +01:00
Manasi Navare
5b0c594543 drm/i915/display/vrr: Create VRR file and add VRR capability check
We create a new file for all VRR related helpers.
Also add a function to check vrr capability based on
platform support, DPCD bits and EDID monitor range.

v2:
* Remove author (Jani N)
* Define HAS_VRR (Jani N)
* Ensure intel_dp can be obtained from conn (Jani N)

v3:
* Fix the header indent (Manasi)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210125200818.2015-1-manasi.d.navare@intel.com
2021-01-25 15:02:45 -08:00
Chen-Yu Tsai
c7b0311500 arm64: dts: rockchip: Add NanoPi M4B board
The NanoPi M4B is a minor revision of the original M4.

The differences against the original Nanopi M4 that are common with the
other M4V2 revision include:

  - microphone header removed
  - power button added
  - recovery button added

Additional changes specific to the M4B:

  - USB 3.0 hub removed; board now has 2x USB 3.0 type-A ports and 2x
    USB 2.0 ports
  - ADB toggle switch added; this changes the top USB 3.0 host port to
    a peripheral port
  - Type-C port no longer supports data or PD
  - WiFi/Bluetooth combo chip switched to AP6256, which supports BT 5.0
    but only 1T1R (down from 2T2R) for WiFi

Add a new dts file for the new board revision that shows the difference
against the original.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20210121162321.4538-5-wens@kernel.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2021-01-25 23:58:36 +01:00
Chen-Yu Tsai
3503376d6c arm64: dts: rockchip: Move ep-gpios property to nanopc-t4 from nanopi4
Only the NanoPC T4 hs the PCIe reset pin routed to the SoC. For the
NanoPi M4 family, no such signal is routed to the expansion header on
the base board.

As the schematics for the expansion board were not released, it is
unclear how this is handled, but the likely answer is that the signal
is always pulled high.

Move the ep-gpios property from the common nanopi4.dtsi file to the
board level nanopc-t4.dts file. This makes the nanopi-m4 lack ep-gpios,
matching the board design.

A companion patch "PCI: rockchip: make ep_gpio optional" for the Linux
driver is required, as the driver currently requires the property to be
present.

Fixes: e7a0959082 ("arm64: dts: rockchip: Add devicetree for NanoPC-T4")
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20210121162321.4538-4-wens@kernel.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2021-01-25 23:58:12 +01:00
Björn Töpel
78ed404591 libbpf, xsk: Select AF_XDP BPF program based on kernel version
Add detection for kernel version, and adapt the BPF program based on
kernel support. This way, users will get the best possible performance
from the BPF program.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Marek Majtyka  <alardam@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/bpf/20210122105351.11751-4-bjorn.topel@gmail.com
2021-01-25 23:57:59 +01:00
Dmitry Osipenko
454ba154a6 rtc: tps65910: Support wakeup-source property
TPS65910 is a PMIC MFD device and RTC is one of its functions. The
wakeup-source DT property is specified for the parent MFD device and we
need to use this property for the RTC in order to allow to use RTC alarm
for waking up system from suspend by default, instead of requiring user
to enable wakeup manually via sysfs.

Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Matt Merhar <mattmerhar@protonmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210120211603.18555-1-digetx@gmail.com
2021-01-25 23:57:24 +01:00
Björn Töpel
f0863eab96 xsk: Fold xp_assign_dev and __xp_assign_dev
Fold xp_assign_dev and __xp_assign_dev. The former directly calls the
latter.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/bpf/20210122105351.11751-3-bjorn.topel@gmail.com
2021-01-25 23:56:33 +01:00
Björn Töpel
458f727234 xsk: Remove explicit_free parameter from __xsk_rcv()
The explicit_free parameter of the __xsk_rcv() function was used to
mark whether the call was via the generic XDP or the native XDP
path. Instead of clutter the code with if-statements and "true/false"
parameters which are hard to understand, simply move the explicit free
to the __xsk_map_redirect() which is always called from the native XDP
path.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/bpf/20210122105351.11751-2-bjorn.topel@gmail.com
2021-01-25 23:56:33 +01:00
Mario Kleiner
efa18405ba drm/amd/display: Fix HDMI deep color output for DCE 6-11.
This fixes corrupted display output in HDMI deep color
10/12 bpc mode at least as observed on AMD Mullins, DCE-8.3.

It will hopefully also provide fixes for other DCE's up to
DCE-11, assuming those will need similar fixes, but i could
not test that for HDMI due to lack of suitable hw, so viewer
discretion is advised.

dce110_stream_encoder_hdmi_set_stream_attribute() is used for
HDMI setup on all DCE's and is missing color_depth assignment.

dce110_program_pix_clk() is used for pixel clock setup on HDMI
for DCE 6-11, and is missing color_depth assignment.

Additionally some of the underlying Atombios specific encoder
and pixelclock setup functions are missing code which is in
the classic amdgpu kms modesetting path and the in the radeon
kms driver for DCE6/DCE8.

encoder_control_digx_v3() - Was missing setup code wrt. amdgpu
and radeon kms classic drivers. Added here, but untested due to
lack of suitable test hw.

encoder_control_digx_v4() - Added missing setup code.
Successfully tested on AMD mullins / DCE-8.3 with HDMI deep color
output at 10 bpc and 12 bpc.

Note that encoder_control_digx_v5() has proper setup code in place
and is used, e.g., by DCE-11.2, but this code wasn't used for deep
color setup due to the missing cntl.color_depth setup in the calling
function for HDMI.

set_pixel_clock_v5() - Missing setup code wrt. classic amdgpu/radeon
kms. Added here, but untested due to lack of hw.

set_pixel_clock_v6() - Missing setup code added. Successfully tested
on AMD mullins DCE-8.3. This fixes corrupted display output at HDMI
deep color output with 10 bpc or 12 bpc.

Fixes: 4562236b3b ("drm/amd/dc: Add dc display driver (v2)")

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:49:47 -05:00
Mario Kleiner
1916866dfa drm/amd/display: Fix 10/12 bpc setup in DCE output bit depth reduction.
In set_clamp(), the comments and definitions for the COLOR_DEPTH_101010
and COLOR_DEPTH_121212 cases directly contradict the code comment which
explains how this should work, whereas the COLOR_DEPTH_888 case
is consistent with the code comments. Comment says the bitmask should
be chosen to align to the top-most 10 or 12 MSB's on a 14 bit bus, but
the implementation contradicts that: 10 bit case sets a mask for 12 bpc
clamping, whereas 12 bit case sets a mask for 14 bpc clamping.

Note that during my limited testing on DCE-8.3 (HDMI deep color)
and DCE-11.2 (DP deep color), this didn't have any obvious ill
effects, neither did fixing it change anything obvious for the
better, so this fix may be inconsequential on DCE, and just
reduce the confusion of innocent bystanders when reading the code
and trying to investigate problems with 10 bpc+ output.

Fixes: 4562236b3b ("drm/amd/dc: Add dc display driver (v2)")

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:49:41 -05:00
Arnd Bergmann
4a517faa34 amdgpu: fix clang build warning
clang warns about the -mhard-float command line arguments
on architectures that do not support this:

clang: error: argument unused during compilation: '-mhard-float' [-Werror,-Wunused-command-line-argument]

Move this into the gcc-specific arguments.

Fixes: e77165bf7b ("drm/amd/display: Add DCN3 blocks to Makefile")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:48:46 -05:00
Dan Carpenter
d3abc78f4f drm/amd/display: Fix a potential NULL dereference
The debug printk dereferences "link->link_enc" before we have ensured
that it is non-NULL.  Fix this potential NULL derefence by moving the
printk after the check.

Fixes: 64ff088242 ("drm/amd/display: Log link/connector info provided in BIOS object table")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:48:02 -05:00
Jonathan Gray
23a63e91c1 drm/amd/display: change license of color_table.c
Change the license of color_table.c to match color_table.h granting
permission to modify and distribute.

Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:47:57 -05:00
Colin Ian King
5993e79398 drm/amdgpu: Fix masking binary not operator on two mask operations
Currently the ! operator is incorrectly being used to flip bits on
mask values. Fix this by using the bit-wise ~ operator instead.

Addresses-Coverity: ("Logical vs. bitwise operator")
Fixes: 3c9a7b7d6e ("drm/amdgpu: update mmhub mgcg&ls for mmhub_v2_3")
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:47:05 -05:00
Arunpravin
eb3b425166 drm/amd/pm: store and reinstate swsmu user power configurations
store swsmu user power configurations which include
power limit, clock frequencies, fan speed and fan mode
on suspend and reinstate on resume.

V2: Addressed Lijo's review comments
     added a function to set clock interdependencies
     add check on fan control mode to reapply fan speed

V3: Addressed review comments from Alex
     moved store logic and reinstate function call into swSMU

V4: added a logic to keep off storing configurations in suspend

V5: Addressed review comments from Lijo
     add a restore flag
     give restore priority to mclk comparing fclk and socclk

Signed-off-by: Arunpravin <Arunpravin.PaneerSelvam@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:47:00 -05:00
Jingwen Chen
64dcf2f01d drm/amd/amdgpu: add error handling to amdgpu_virt_read_pf2vf_data
[Why]
when vram lost happened in guest, try to write vram can lead to
kernel stuck.

[How]
When the readback data is invalid, don't do write work, directly
reschedule a new work.

Signed-off-by: Jingwen Chen <Jingwen.Chen2@amd.com>
Reviewed-by: Monk Liu<monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:46:48 -05:00
Alexandre Belloni
f66e7f2d32 rtc: stm32: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-14-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
31247546b4 rtc: rx8025: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-13-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
2dbbedb9b3 rtc: rx8010: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-12-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
2a5654fe2b rtc: rv3029: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-11-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
a82430fd2d rtc: pcf2123: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-10-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
cc92301784 rtc: mcp795: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-9-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
06c6e32167 rtc: m41t80: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-8-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
92e2c3e61d rtc: hym8563: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-7-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
3aa7eaf238 rtc: ds3232: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-6-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
811c791660 rtc: ds1685: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Joshua Kinard <kumba@gentoo.org>
Link: https://lore.kernel.org/r/20210119220653.677750-5-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
5923819274 rtc: ds1307: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-4-alexandre.belloni@bootlin.com
2021-01-25 23:46:17 +01:00
Alexandre Belloni
d57949bb3c rtc: ds1305: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-3-alexandre.belloni@bootlin.com
2021-01-25 23:46:16 +01:00
Alexandre Belloni
3fbd293c16 rtc: asm9260: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210119220653.677750-2-alexandre.belloni@bootlin.com
2021-01-25 23:46:16 +01:00
Lang Yu
9024fb0815 drm/amd/display: fix 64-bit division issue on 32-bit OS
Replace "/" with div_u64 for 32-bit OS. On 32-bit OS,
the use of "/" for 64-bit division will cause build error,
i.e. "__udivdi3/__divdi3 undefined!".

Fixes: ea7154d8d9 ("drm/amd/display: Update dcn30_apply_idle_power_optimizations() code")
Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:45:53 -05:00
Alexandre Belloni
de490e0580 rtc: ac100: use rtc_lock/rtc_unlock
Avoid accessing directly rtc->ops_lock and use the RTC core helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210125221402.1958484-1-alexandre.belloni@bootlin.com
2021-01-25 23:45:37 +01:00
Pratik Vishwakarma
d80d3da950 Revert "drm/amd/display: Tune min clk values for MPO for RV"
This reverts commit 57eeaf47a6.
Original issue of flash line when MPO enabled on idle screen
was fixed by raising clocks. This had negative effect of extra
power being drained. With the upstream commit 9d03bb1020
("drm/amd/display: disable dcn10 pipe split by default")
flash line issue was fixed and had positive effect for
battery life. Hence this patch is no more required.

Signed-off-by: Pratik Vishwakarma <Pratik.Vishwakarma@amd.com>
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:45:21 -05:00
Horace Chen
91fb309d82 drm/amdgpu: race issue when jobs on 2 ring timeout
Fix a racing issue when jobs on 2 rings timeout simultaneously.

If 2 rings timed out at the same time, the
amdgpu_device_gpu_recover will be reentered. Then the
adev->gmc.xgmi.head will be grabbed by 2 local linked list,
which may cause wild pointer issue in iterating.

lock the device earily to prevent the node be added to 2
different lists.

also increase karma for the skipped job since the job is also
timed out and should be guilty.

Signed-off-by: Horace Chen <horace.chen@amd.com>
Reviewed-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:45:16 -05:00
Felix Kuehling
eda1068dc9 drm/amdgpu: Make contiguous pinning optional
Enable pinning of VRAM without forcing it to be contiguous. When memory is
already pinned, make sure it's contiguous if requested.

Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-01-25 17:45:10 -05:00
Stanislav Jakubek
fbdc88043c ARM: dts: bcm21664: Replace spaces with a tab
Fix checkpatch warning:

WARNING: please, no spaces at the start of a line

Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2021-01-25 14:33:19 -08:00
Ard Biesheuvel
a8e190cdae KVM: arm64: Implement the TRNG hypervisor call
Provide a hypervisor implementation of the ARM architected TRNG firmware
interface described in ARM spec DEN0098. All function IDs are implemented,
including both 32-bit and 64-bit versions of the TRNG_RND service, which
is the centerpiece of the API.

The API is backed by the kernel's entropy pool only, to avoid guests
draining more precious direct entropy sources.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
[Andre: minor fixes, drop arch_get_random() usage]
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210106103453.152275-6-andre.przywara@arm.com
2021-01-25 22:19:31 +00:00
Masahiro Yamada
9b6164342e doc: gcc-plugins: update gcc-plugins.rst
This document was written a long time ago. Update it.

[1] Drop the version information

The range of the supported GCC versions are always changing. The
current minimal GCC version is 4.9, and commit 1e860048c5
("gcc-plugins: simplify GCC plugin-dev capability test") removed the
old code accordingly.

We do not need to mention specific version ranges like "all gcc versions
from 4.5 to 6.0" since we forget to update the documentation when we
raise the minimal compiler version.

[2] Drop the C compiler statements

Since commit 77342a02ff ("gcc-plugins: drop support for GCC <= 4.7")
the GCC plugin infrastructure only supports g++.

[3] Drop supported architectures

As of v5.11-rc4, the infrastructure supports more architectures;
arm, arm64, mips, powerpc, riscv, s390, um, and x86. (just grep
"select HAVE_GCC_PLUGINS") Again, we miss to update this document when a
new architecture is supported. Let's just say "only some architectures".

[4] Update the apt-get example

We are now discussing to bump the minimal version to GCC 5. The GCC 4.9
support will be removed sooner or later. Change the package example to
gcc-10-plugin-dev while we are here.

[5] Update the build target

Since commit ce2fd53a10 ("kbuild: descend into scripts/gcc-plugins/
via scripts/Makefile"), "make gcc-plugins" is not supported.
"make scripts" builds all the enabled plugins, including some other
tools.

[6] Update the steps for adding a new plugin

At first, all CONFIG options for GCC plugins were located in arch/Kconfig.
After commit 45332b1bdf ("gcc-plugins: split out Kconfig entries to
scripts/gcc-plugins/Kconfig"), scripts/gcc-plugins/Kconfig became the
central place to collect plugin CONFIG options. In my understanding,
this requirement no longer exists because commit 9f671e5815 ("security:
Create "kernel hardening" config area") moved some of plugin CONFIG
options to another file. Find an appropriate place to add the new CONFIG.

The sub-directory support was never used by anyone, and removed by
commit c17d6179ad ("gcc-plugins: remove unused GCC_PLUGIN_SUBDIR").

Remove the useless $(src)/ prefix.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2021-01-26 06:23:20 +09:00
Paolo Valente
71217df39d block, bfq: make waker-queue detection more robust
In the presence of many parallel I/O flows, the detection of waker
bfq_queues suffers from false positives. This commits addresses this
issue by making the filtering of actual wakers more selective. In more
detail, a candidate waker must be found to meet waker requirements
three times before being promoted to actual waker.

Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-25 14:18:37 -07:00
Paolo Valente
5a5436b98d block, bfq: save also injection state on queue merging
To prevent injection information from being lost on bfq_queue merging,
also the amount of service that a bfq_queue receives must be saved and
restored when the bfq_queue is merged and split, respectively.

Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-25 14:18:35 -07:00
Paolo Valente
e673914d52 block, bfq: save also weight-raised service on queue merging
To prevent weight-raising information from being lost on bfq_queue merging,
also the amount of service that a bfq_queue receives must be saved and
restored when the bfq_queue is merged and split, respectively.

Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-25 14:18:34 -07:00
Paolo Valente
d1f600fa47 block, bfq: fix switch back from soft-rt weitgh-raising
A bfq_queue may happen to be deemed as soft real-time while it is
still enjoying interactive weight-raising. If this happens because of
a false positive, then the bfq_queue is likely to loose its soft
real-time status soon. Upon losing such a status, the bfq_queue must
get back its interactive weight-raising, if its interactive period is
not over yet. But this case is not handled. This commit corrects this
error.

Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-25 14:18:32 -07:00
Paolo Valente
7f1995c27b block, bfq: re-evaluate convenience of I/O plugging on rq arrivals
Upon an I/O-dispatch attempt, BFQ may detect that it was better to
plug I/O dispatch, and to wait for a new request to arrive for the
currently in-service queue. But the arrival of a new request for an
empty bfq_queue, and thus the switch from idle to busy of the
bfq_queue, may cause the scenario to change, and make plugging no
longer needed for service guarantees, or more convenient for
throughput. In this case, keeping I/O-dispatch plugged would certainly
lower throughput.

To address this issue, this commit makes such a check, and stops
plugging I/O if it is better to stop plugging I/O.

Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-25 14:18:31 -07:00
Paolo Valente
eb2fd80f9d block, bfq: replace mechanism for evaluating I/O intensity
Some BFQ mechanisms make their decisions on a bfq_queue basing also on
whether the bfq_queue is I/O bound. In this respect, the current logic
for evaluating whether a bfq_queue is I/O bound is rather rough. This
commits replaces this logic with a more effective one.

The new logic measures the percentage of time during which a bfq_queue
is active, and marks the bfq_queue as I/O bound if the latter if this
percentage is above a fixed threshold.

Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-25 14:18:29 -07:00
Florian Fainelli
e066cfd867 Select BRCMSTB_L2_IRQ as it's now used on Raspberry Pi 4
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Merge tag 'tags/bcm2835-soc-next-2021-01-25' into soc/next

Select BRCMSTB_L2_IRQ as it's now used on Raspberry Pi 4

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2021-01-25 13:14:49 -08:00
Geert Uytterhoeven
b45616445a auxdisplay: Fix duplicate CHARLCD config symbol
A second CHARLCD config symbol was added instead of moving the existing
one.  Fix this by removing the old one.

Fixes: 718e05ed92 ("auxdisplay: Introduce hd44780_common.[ch]")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2021-01-25 22:14:19 +01:00
Geert Uytterhoeven
e89b0a4267 auxdisplay: ht16k33: Fix refresh rate handling
Drop the call to msecs_to_jiffies(), as "HZ / fbdev->refresh_rate" is
already the number of jiffies to wait.

Fixes: 8992da44c6 ("auxdisplay: ht16k33: Driver for LED controller")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2021-01-25 22:14:19 +01:00
Geert Uytterhoeven
f12b457c6b dt-bindings: auxdisplay: ht16k33: Convert to json-schema
Convert the Holtek HT16K33 LED controller with keyscan Device Tree
binding documentation to json-schema.

Move the file from display to auxdisplay.
Update the example:
  - Sort properties in order of documentation,
  - Group tuples using angle brackets to improve human readability and
    enable automatic validation.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Robin van der Gracht <robin@protonic.nl>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2021-01-25 22:16:10 +01:00