ARC: migrate to the generic rule for built-in DTB

Commit 654102df2ac2 ("kbuild: add generic support for built-in boot
DTBs") introduced generic support for built-in DTBs.

Select GENERIC_BUILTIN_DTB

ARC: migrate to the generic rule for built-in DTB

Commit 654102df2ac2 ("kbuild: add generic support for built-in boot
DTBs") introduced generic support for built-in DTBs.

Select GENERIC_BUILTIN_DTB to use the generic rule.

To keep consistency across architectures, this commit also renames
CONFIG_ARC_BUILTIN_DTB_NAME to CONFIG_BUILTIN_DTB_NAME.

Now, "nsim_700" is the default value for CONFIG_BUILTIN_DTB_NAME, rather
than a fallback in case it is empty.

Acked-by: Vineet Gupta <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

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treewide: drop CONFIG_EMBEDDED

There is only one Kconfig user of CONFIG_EMBEDDED and it can be switched
to EXPERT or "if !ARCH_MULTIPLATFORM" (suggested by Arnd).

Link: https://lkml.kernel.org/r/20

treewide: drop CONFIG_EMBEDDED

There is only one Kconfig user of CONFIG_EMBEDDED and it can be switched
to EXPERT or "if !ARCH_MULTIPLATFORM" (suggested by Arnd).

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Randy Dunlap <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Palmer Dabbelt <[email protected]> [RISC-V]
Acked-by: Greg Ungerer <[email protected]>
Acked-by: Jason A. Donenfeld <[email protected]>
Acked-by: Michael Ellerman <[email protected]> [powerpc]
Cc: Russell King <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Brian Cain <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Dinh Nguyen <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: Stefan Kristiansson <[email protected]>
Cc: Stafford Horne <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: John Paul Adrian Glaubitz <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Josh Triplett <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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mm/slab: rename CONFIG_SLAB to CONFIG_SLAB_DEPRECATED

As discussed at LSF/MM [1] [2] and with no objections raised there,
deprecate the SLAB allocator. Rename the user-visible option so that
users w

mm/slab: rename CONFIG_SLAB to CONFIG_SLAB_DEPRECATED

As discussed at LSF/MM [1] [2] and with no objections raised there,
deprecate the SLAB allocator. Rename the user-visible option so that
users with CONFIG_SLAB=y get a new prompt with explanation during make
oldconfig, while make olddefconfig will just switch to SLUB.

In all defconfigs with CONFIG_SLAB=y remove the line so those also
switch to SLUB. Regressions due to the switch should be reported to
linux-mm and slab maintainers.

[1] https://lore.kernel.org/all/[email protected]/
[2] https://lwn.net/Articles/932201/

Signed-off-by: Vlastimil Babka <[email protected]>
Acked-by: Hyeonggon Yoo <[email protected]>
Acked-by: David Rientjes <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]> # m68k
Acked-by: Helge Deller <[email protected]> # parisc

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arc: update config files

Clean up config files by:
- removing configs that were deleted in the past
- removing configs not in tree and without recently pending patches
- adding new configs tha

arc: update config files

Clean up config files by:
- removing configs that were deleted in the past
- removing configs not in tree and without recently pending patches
- adding new configs that are replacements for old configs in the file

For some detailed information, see Link.

Link: https://lore.kernel.org/kernel-janitors/[email protected]/

Signed-off-by: Lukas Bulwahn <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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kbuild: drop support for CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3

The difference in most compilers between `-O3` and `-O2` is mostly down
to whether loops with statically determinable trip counts are f

kbuild: drop support for CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3

The difference in most compilers between `-O3` and `-O2` is mostly down
to whether loops with statically determinable trip counts are fully
unrolled vs unrolled to a multiple of SIMD width.

This patch is effectively a revert of
commit 15f5db60a137 ("kbuild,arc: add
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 for ARC") without re-adding
ARCH_CFLAGS

Ever since
commit cfdbc2e16e65 ("ARC: Build system: Makefiles, Kconfig, Linker
script")
ARC has been built with -O3, though the reason for doing so was not
specified in inline comments or the commit message. This commit does not
re-add -O3 to arch/arc/Makefile.

Folks looking to experiment with `-O3` (or any compiler flag for that
matter) may pass them along to the command line invocation of make:

$ make KCFLAGS=-O3

Code that looks to re-add an explicit Kconfig option for `-O3` should
provide:
1. A rigorous and reproducible performance profile of a reasonable
userspace workload that demonstrates a hot loop in the kernel that
would benefit from `-O3` over `-O2`.
2. Disassembly of said loop body before and after.
3. Provides stats on terms of increase in file size.

Link: https://lore.kernel.org/linux-kbuild/CA+55aFz2sNBbZyg-_i8_Ldr2e8o9dfvdSfHHuRzVtP2VMAUWPg@mail.gmail.com/
Signed-off-by: Nick Desaulniers <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

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ARC: [plat-hsdk]: fix USB regression

As of today the CONFIG_USB isn't explicitly present in HSDK defconfig
as it is implicitly forcibly enabled by UDL driver which selects CONFIG_USB
in its kconfig.

ARC: [plat-hsdk]: fix USB regression

As of today the CONFIG_USB isn't explicitly present in HSDK defconfig
as it is implicitly forcibly enabled by UDL driver which selects CONFIG_USB
in its kconfig.
The commit 5d50bd440bc2 ("drm/udl: Make udl driver depend on CONFIG_USB")
reverse the dependencies between UDL and USB so UDL now depends on
CONFIG_USB and not selects it. This introduces regression for ARC HSDK
board as HSDK defconfig wasn't adjusted and now it misses USB support
due to lack of CONFIG_USB enabled.

Fix that.

Cc: <[email protected]> # 5.6.x
Fixes: 5d50bd440bc2 ("drm/udl: Make udl driver depend on CONFIG_USB")
Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: [plat-hsdk]: Enable on-boardi SPI ADC IC

HSDK board has adc108s102 SPI ADC IC installed, enable it.

Acked-by: Alexey Brodkin <[email protected]>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Pal

ARC: [plat-hsdk]: Enable on-boardi SPI ADC IC

HSDK board has adc108s102 SPI ADC IC installed, enable it.

Acked-by: Alexey Brodkin <[email protected]>
Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: [plat-hsdk]: Enable on-board SPI NOR flash IC

HSDK board has sst26wf016b SPI NOR flash IC installed, enable it.

Acked-by: Alexey Brodkin <[email protected]>
Signed-off-by: Eugeniy Paltsev

ARC: [plat-hsdk]: Enable on-board SPI NOR flash IC

HSDK board has sst26wf016b SPI NOR flash IC installed, enable it.

Acked-by: Alexey Brodkin <[email protected]>
Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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kbuild,arc: add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 for ARC

arch/arc/Makefile overrides -O2 with -O3. This is the only user of
ARCH_CFLAGS. There is no user of ARCH_CPPFLAGS or ARCH_AFLAGS.
My pla

kbuild,arc: add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 for ARC

arch/arc/Makefile overrides -O2 with -O3. This is the only user of
ARCH_CFLAGS. There is no user of ARCH_CPPFLAGS or ARCH_AFLAGS.
My plan is to remove ARCH_{CPP,A,C}FLAGS after refactoring the ARC
Makefile.

Currently, ARC has no way to enable -Wmaybe-uninitialized because both
-O3 and -Os disable it. Enabling it will be useful for compile-testing.
This commit allows allmodconfig (, which defaults to -O2) to enable it.

Add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y to all the defconfig files
in arch/arc/configs/ in order to keep the current config settings.

Signed-off-by: Masahiro Yamada <[email protected]>
Acked-by: Vineet Gupta <[email protected]>

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ARC: [plat-hsdk]: Enable AXI DW DMAC in defconfig

For some reasons my previous patch "Enable AXI DW DMAC support"
was applied only partially (only device tree part).
So enable AXI DW DMAC in HSDK de

ARC: [plat-hsdk]: Enable AXI DW DMAC in defconfig

For some reasons my previous patch "Enable AXI DW DMAC support"
was applied only partially (only device tree part).
So enable AXI DW DMAC in HSDK defconfig to be able to use it in
verification flow.

Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: [plat-hsdk]: enable DW SPI controller

HSDK SoC has DW SPI controller. Enable it in preparation of
enabling on-board SPI peripherals.

Acked-by: Alexey Brodkin <[email protected]>
Signed-off

ARC: [plat-hsdk]: enable DW SPI controller

HSDK SoC has DW SPI controller. Enable it in preparation of
enabling on-board SPI peripherals.

Acked-by: Alexey Brodkin <[email protected]>
Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: [plat-hsdk]: Add support of Vivante GPU

HSDK board has built-in Vivante GPU IP which works perfectly fine
with Etnaviv driver, so let's use it.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@

ARC: [plat-hsdk]: Add support of Vivante GPU

HSDK board has built-in Vivante GPU IP which works perfectly fine
with Etnaviv driver, so let's use it.

Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: [plat-hsdk]: enable creg-gpio controller

HSDK SOC has CREG GPIO controller which can be used to control
SPI chip select lines.
Enable it in preparation of enabling SPI peripherals.

Acked-by: A

ARC: [plat-hsdk]: enable creg-gpio controller

HSDK SOC has CREG GPIO controller which can be used to control
SPI chip select lines.
Enable it in preparation of enabling SPI peripherals.

Acked-by: Alexey Brodkin <[email protected]>
Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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configs: get rid of obsolete CONFIG_ENABLE_WARN_DEPRECATED

This Kconfig option was removed during v4.19 development in commit
771c035372a0 ("deprecate the '__deprecated' attribute warnings entirely

configs: get rid of obsolete CONFIG_ENABLE_WARN_DEPRECATED

This Kconfig option was removed during v4.19 development in commit
771c035372a0 ("deprecate the '__deprecated' attribute warnings entirely
and for good") so there's no point to keep it in defconfigs any longer.

FWIW defconfigs were patched with:
--------------------------->8----------------------
find . -name *_defconfig -exec sed -i '/CONFIG_ENABLE_WARN_DEPRECATED/d' {} \;
--------------------------->8----------------------

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Alexey Brodkin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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arc: hsdk_defconfig: Enable CONFIG_BLK_DEV_RAM

We have now a HSDK device in our kernelci lab, but kernel builded via
the hsdk_defconfig lacks ramfs supports, so it cannot boot kernelci jobs
yet.

So

arc: hsdk_defconfig: Enable CONFIG_BLK_DEV_RAM

We have now a HSDK device in our kernelci lab, but kernel builded via
the hsdk_defconfig lacks ramfs supports, so it cannot boot kernelci jobs
yet.

So this patch enable CONFIG_BLK_DEV_RAM in hsdk_defconfig.

Signed-off-by: Corentin Labbe <[email protected]>
Acked-by: Alexey Brodkin <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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arc: [devboards] Add support of NFSv3 ACL

By default NFSv3 doesn't support ACL (Access Control Lists)
which might be quite convenient to have so that
mounted NFS behaves exactly as any other local f

arc: [devboards] Add support of NFSv3 ACL

By default NFSv3 doesn't support ACL (Access Control Lists)
which might be quite convenient to have so that
mounted NFS behaves exactly as any other local file-system.

In particular missing support of ACL makes umask useless.
This among other thigs fixes Glibc's "nptl/tst-umask1".

Signed-off-by: Alexey Brodkin <[email protected]>
Cc: Cupertino Miranda <[email protected]>
Cc: [email protected] #4.14+
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: [plat-hsdk] Enable DW APB GPIO support

Enable GPIO support on HSDK. HSDK SoC includes Synopsys
DesignWare DW_apb_gpio IP with 24 GPIOs mapped onto port A.

Signed-off-by: Eugeniy Paltsev <Eugen

ARC: [plat-hsdk] Enable DW APB GPIO support

Enable GPIO support on HSDK. HSDK SoC includes Synopsys
DesignWare DW_apb_gpio IP with 24 GPIOs mapped onto port A.

Signed-off-by: Eugeniy Paltsev <[email protected]>
Acked-by: Alexey Brodkin <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: configs: cleanup

- Remove CONFIG_DEFAULT_HOSTNAME from defconfigs

There's no reason to set the same hostname to all ARC boards
by default. It usually gets overwritten by init scripts an

ARC: configs: cleanup

- Remove CONFIG_DEFAULT_HOSTNAME from defconfigs

There's no reason to set the same hostname to all ARC boards
by default. It usually gets overwritten by init scripts anyways.

- Remove disabled CONFIG_DEVKMEM from defconfigs

It is disabled by default

Signed-off-by: Alexey Brodkin <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: configs: Remove CONFIG_INITRAMFS_SOURCE from defconfigs

We used to have pre-set CONFIG_INITRAMFS_SOURCE with local path
to intramfs in ARC defconfigs. This was quite convenient for
in-house dev

ARC: configs: Remove CONFIG_INITRAMFS_SOURCE from defconfigs

We used to have pre-set CONFIG_INITRAMFS_SOURCE with local path
to intramfs in ARC defconfigs. This was quite convenient for
in-house development but not that convenient for newcomers
who obviusly don't have folders like "arc_initramfs" next to
the Linux source tree. Which leads to quite surprising failure
of defconfig building:
------------------------------->8-----------------------------
../scripts/gen_initramfs_list.sh: Cannot open '../../arc_initramfs_hs/'
../usr/Makefile:57: recipe for target 'usr/initramfs_data.cpio.gz' failed
make[2]: *** [usr/initramfs_data.cpio.gz] Error 1
------------------------------->8-----------------------------

So now when more and more people start to deal with our defconfigs
let's make their life easier with removal of CONFIG_INITRAMFS_SOURCE.

Signed-off-by: Alexey Brodkin <[email protected]>
Cc: Kevin Hilman <[email protected]>
Cc: [email protected]

Signed-off-by: Alexey Brodkin <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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firmware: Drop FIRMWARE_IN_KERNEL Kconfig option

It doesn't actually do anything. Merge its help text into
EXTRA_FIRMWARE.

Fixes: 5620a0d1aacd ("firmware: delete in-kernel firmware")
Fixes: 0946b2

firmware: Drop FIRMWARE_IN_KERNEL Kconfig option

It doesn't actually do anything. Merge its help text into
EXTRA_FIRMWARE.

Fixes: 5620a0d1aacd ("firmware: delete in-kernel firmware")
Fixes: 0946b2fb38fd ("firmware: cleanup FIRMWARE_IN_KERNEL message")
Signed-off-by: Benjamin Gilbert <[email protected]>
Signed-off-by: Robin H. Johnson <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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ARC: [plat-hsdk] Switch DisplayLink driver from fbdev to DRM

Currently there're 2 different implementations of the driver for
DisplayLink USB2.0-to-HDMI/DVI adapters: older FBDEV and modern true
DRM

ARC: [plat-hsdk] Switch DisplayLink driver from fbdev to DRM

Currently there're 2 different implementations of the driver for
DisplayLink USB2.0-to-HDMI/DVI adapters: older FBDEV and modern true
DRM.

We initially decided to use FBDEV version just because with it
/dev/fbX is usable from user-space while in DRM version
with DRM_FBDEV_EMULATION user-space cannot draw anything on a real
screen, for more info read [1].

But today /dev/fbX is not that important as more and more software
projects switch to use of DRI (/dev/dri/cardX).

But what's even more important DRM driver allows building of complicated
graphics processing chains. The most important for us is rendering of
3D on a dedicated GPU while outputting video through a simpler
bitstreamer like DisplayLink. So let's use much more future-proof
driver from now on.

[1] https://lists.freedesktop.org/archives/dri-devel/2017-December/159519.html

Signed-off-by: Alexey Brodkin <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: [plat-hsdk] select CONFIG_RESET_HSDK from Kconfig

Signed-off-by: Vineet Gupta <[email protected]>

ARC: [plat-hsdk]: Add reset controller node to manage ethernet reset

DW ethernet controller on HSDK hangs sometimes after SW reset, so
add reset node to make possible to reset DW ethernet controller

ARC: [plat-hsdk]: Add reset controller node to manage ethernet reset

DW ethernet controller on HSDK hangs sometimes after SW reset, so
add reset node to make possible to reset DW ethernet controller HW.

Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: [*defconfig] Reenable soft lock-up detector

Commit 92e5aae45778 "kernel/watchdog: split up config options"
introduced SOFTLOCKUP_DETECTOR which selects LOCKUP_DETECTOR
instead of the latter to

ARC: [*defconfig] Reenable soft lock-up detector

Commit 92e5aae45778 "kernel/watchdog: split up config options"
introduced SOFTLOCKUP_DETECTOR which selects LOCKUP_DETECTOR
instead of the latter to be selected itself.

We need to adjust our defconfigs accordingly.

Signed-off-by: Alexey Brodkin <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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ARC: [plat-hsdk] initial port for HSDK board

This initial port adds support of ARC HS Development Kit board with some
basic features such serial port, USB, SD/MMC and Ethernet.

Essentially we run L

ARC: [plat-hsdk] initial port for HSDK board

This initial port adds support of ARC HS Development Kit board with some
basic features such serial port, USB, SD/MMC and Ethernet.

Essentially we run Linux kernel on all 4 cores (i.e. utilize SMP) and
heavily use IO Coherency for speeding-up DMA-aware peripherals.

Note as opposed to other ARC boards we link Linux kernel to
0x9000_0000 intentionally because cores 1 and 3 configured with DCCM
situated at our more usual link base 0x8000_0000. We still can use
memory region starting at 0x8000_0000 as we reallocate DCCM in our
platform code.

Note that PAE remapping for DMA clients does not work due to an RTL bug,
so CREG_PAE register must be programmed to all zeroes, otherwise it will
cause problems with DMA to/from peripherals even if PAE40 is not used.

Acked-by: Rob Herring <[email protected]>
Signed-off-by: Alexey Brodkin <[email protected]>
Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>

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