ARM: bcm: Support BCMBCA debug UART

The debug UART on the BCMBCA SoCs are in a different place
than on the other BCM platforms. Support this with a static
map when debugging is explicitly configured

ARM: bcm: Support BCMBCA debug UART

The debug UART on the BCMBCA SoCs are in a different place
than on the other BCM platforms. Support this with a static
map when debugging is explicitly configured.

Right now I can only test this on BCM6846 so this is the
only compatible I list for the debug boardfile, but other
compatibles from the BCMBCA family can be added to get
LL_DEBUG support.

Signed-off-by: Linus Walleij <[email protected]>
Acked-by: William Zhang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Florian Fainelli <[email protected]>

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ARM: 9353/1: remove unneeded entry for CONFIG_FRAME_POINTER

This is no-op.

FRAME_POINTER is defined in lib/Kconfig.debug.

Signed-off-by: Masahiro Yamada <[email protected]>
Signed-off-by: Russe

ARM: 9353/1: remove unneeded entry for CONFIG_FRAME_POINTER

This is no-op.

FRAME_POINTER is defined in lib/Kconfig.debug.

Signed-off-by: Masahiro Yamada <[email protected]>
Signed-off-by: Russell King (Oracle) <[email protected]>

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arm: ptdump: rename CONFIG_DEBUG_WX to CONFIG_ARM_DEBUG_WX

Patch series "mm: ptdump: Refactor CONFIG_DEBUG_WX and check_wx_pages
debugfs attribute", v2.

This series refactors CONFIG_DEBUG_WX for th

arm: ptdump: rename CONFIG_DEBUG_WX to CONFIG_ARM_DEBUG_WX

Patch series "mm: ptdump: Refactor CONFIG_DEBUG_WX and check_wx_pages
debugfs attribute", v2.

This series refactors CONFIG_DEBUG_WX for the 5 architectures implementing
CONFIG_GENERIC_PTDUMP

First rename stuff in ARM which uses similar names while not implementing
CONFIG_GENERIC_PTDUMP.

Then define a generic version of debug_checkwx() that calls
ptdump_check_wx() when CONFIG_DEBUG_WX is set. Call it immediately after
calling mark_rodata_ro() instead of calling it at the end of every
mark_rodata_ro().

Then implement a debugfs attribute that can be used to trigger a W^X test
at anytime and regardless of CONFIG_DEBUG_WX


This patch (of 5):

CONFIG_DEBUG_WX is a core option defined in mm/Kconfig.debug

To avoid any future conflict, rename ARM version into CONFIG_ARM_DEBUG_WX.

Link: https://lore.kernel.org/lkml/20200422152656.GF676@willie-the-truck/T/#m802eaf33efd6f8d575939d157301b35ac0d4a64f
Link: https://github.com/KSPP/linux/issues/35
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/fa297aa90caeb61eee2b70c6c5897a2ab58a9562.1706610398.git.christophe.leroy@csgroup.eu
Signed-off-by: Christophe Leroy <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Alexander Gordeev <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: "Aneesh Kumar K.V (IBM)" <[email protected]>
Cc: Borislav Petkov (AMD) <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Gerald Schaefer <[email protected]>
Cc: Greg KH <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: "Naveen N. Rao" <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Phong Tran <[email protected]>
Cc: Russell King <[email protected]>
Cc: Steven Price <[email protected]>
Cc: Sven Schnelle <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Alexandre Ghiti <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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ARM: debug: fix DEBUG_UNCOMPRESS help for !MULTIPLATFORM

Commit 84fc86360623 ("ARM: make ARCH_MULTIPLATFORM user-visible") modified
DEBUG_UNCOMPRESS to prevent using it with multiplatform kernels.

ARM: debug: fix DEBUG_UNCOMPRESS help for !MULTIPLATFORM

Commit 84fc86360623 ("ARM: make ARCH_MULTIPLATFORM user-visible") modified
DEBUG_UNCOMPRESS to prevent using it with multiplatform kernels.

Update the help text, remove references to multiplatform.

Signed-off-by: Martin Kaiser <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

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arm: debug: reuse the config DEBUG_OMAP2UART{1,2} for OMAP{3,4,5}

Commit d2b310b0234c ("ARM: debug: Use generic 8250 debug_ll for omap2 and
omap3/4/5 common uarts") adds address definitions of DEBUG

arm: debug: reuse the config DEBUG_OMAP2UART{1,2} for OMAP{3,4,5}

Commit d2b310b0234c ("ARM: debug: Use generic 8250 debug_ll for omap2 and
omap3/4/5 common uarts") adds address definitions of DEBUG_UART_PHYS for
OMAP2, OMAP3, OMAP4 and OMAP5 in ./arch/arm/Kconfig.debug.

These definitions depend on DEBUG_OMAP{2,3,4,5}UART{1,2}; however, only
DEBUG_OMAP2UART{1,2} are defined in ./arch/arm/Kconfig.debug, and
DEBUG_OMAP{3,4,5}UART{1,2} are not defined. Hence, the script
./scripts/checkkconfigsymbols.py warns here on non-existing symbols.
Simply reuse the config DEBUG_OMAP2UART{1,2}; there is no need to define
separate config symbols for OMAP{3,4,5}. So, just delete the dead
references to DEBUG_OMAP{3,4,5}UART{1,2}.

Signed-off-by: Lukas Bulwahn <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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ARM: debug: remove references in DEBUG_UART_8250_SHIFT to removed configs

Commit 67d3928c3df5 ("ARM: omap1: remove unused board files") removes
configs DEBUG_OMAP7XXUART{1,2,3}.

The config DEBUG_UA

ARM: debug: remove references in DEBUG_UART_8250_SHIFT to removed configs

Commit 67d3928c3df5 ("ARM: omap1: remove unused board files") removes
configs DEBUG_OMAP7XXUART{1,2,3}.

The config DEBUG_UART_8250_SHIFT still refers to those removed configs.

Remove those obsolete references.

Signed-off-by: Lukas Bulwahn <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

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ARM: 9288/1: Kconfigs: fix spelling & grammar

Fix spelling (reported by codespell) and grammar in Arm Kconfig files.

Signed-off-by: Randy Dunlap <[email protected]>
Cc: [email protected]

ARM: 9288/1: Kconfigs: fix spelling & grammar

Fix spelling (reported by codespell) and grammar in Arm Kconfig files.

Signed-off-by: Randy Dunlap <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Russell King (Oracle) <[email protected]>

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ARM: s3c: remove all s3c24xx support

The platform was deprecated in commit 6a5e69c7ddea ("ARM: s3c: mark
as deprecated and schedule removal") and can be removed. This includes
all files that are exc

ARM: s3c: remove all s3c24xx support

The platform was deprecated in commit 6a5e69c7ddea ("ARM: s3c: mark
as deprecated and schedule removal") and can be removed. This includes
all files that are exclusively for s3c24xx and not shared with s3c64xx,
as well as the glue logic in Kconfig and the maintainer file entries.

Cc: Arnaud Patard <[email protected]>
Cc: Ben Dooks <[email protected]>
Cc: Christer Weinigel <[email protected]>
Cc: Guillaume GOURAT <[email protected]>
Cc: Heiko Stuebner <[email protected]>
Cc: Simtec Linux Team <[email protected]>
Cc: [email protected]
Acked-by: Heiko Stuebner <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

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ARM: davinci: remove unused board support

All Kconfig entries marked as "depends on UNUSED_BOARD_FILES"
and their direct dependencies are removed here as planned.

Acked-by: Bartosz Golaszewski <bar

ARM: davinci: remove unused board support

All Kconfig entries marked as "depends on UNUSED_BOARD_FILES"
and their direct dependencies are removed here as planned.

Acked-by: Bartosz Golaszewski <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

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ARM: omap1: remove unused board files

All board support that was marked as 'unused' earlier can
now be removed, leaving the five machines that that still
had someone using them in 2022, or that are

ARM: omap1: remove unused board files

All board support that was marked as 'unused' earlier can
now be removed, leaving the five machines that that still
had someone using them in 2022, or that are supported in
qemu.

Cc: Aaro Koskinen <[email protected]>
Cc: Janusz Krzysztofik <[email protected]>
Cc: Tony Lindgren <[email protected]>
Cc: [email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

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ARM: iop32x: remove the platform

This was marked as unused in 5.19 and can now be removed

Cc: Lennert Buytenhek <[email protected]>
Cc: Martin Michlmayr <[email protected]>
Acked-by: Dan Williams

ARM: iop32x: remove the platform

This was marked as unused in 5.19 and can now be removed

Cc: Lennert Buytenhek <[email protected]>
Cc: Martin Michlmayr <[email protected]>
Acked-by: Dan Williams <[email protected]>
Acked-by: Wolfram Sang <[email protected]> # for I2C
Signed-off-by: Arnd Bergmann <[email protected]>

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ARM: cns3xxx: remove entire platform

cns3xxx was marked as unused a while ago, and gets removed
entirely now.

Acked-by: Krzysztof Hałasa <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]

ARM: cns3xxx: remove entire platform

cns3xxx was marked as unused a while ago, and gets removed
entirely now.

Acked-by: Krzysztof Hałasa <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

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ARM: make ARCH_MULTIPLATFORM user-visible

Some options like CONFIG_DEBUG_UNCOMPRESS and CONFIG_CMDLINE_FORCE are
fundamentally incompatible with portable kernels but are currently allowed
in all con

ARM: make ARCH_MULTIPLATFORM user-visible

Some options like CONFIG_DEBUG_UNCOMPRESS and CONFIG_CMDLINE_FORCE are
fundamentally incompatible with portable kernels but are currently allowed
in all configurations. Other options like XIP_KERNEL are essentially
useless after the completion of the multiplatform conversion.

Repurpose the existing CONFIG_ARCH_MULTIPLATFORM option to decide
whether the resulting kernel image is meant to be portable or not,
and using this to guard all of the known incompatible options.

This is similar to how the RISC-V kernel handles the CONFIG_NONPORTABLE
option (with the opposite polarity).

A few references to CONFIG_ARCH_MULTIPLATFORM were left behind by
earlier clanups and have to be removed now up.

Signed-off-by: Arnd Bergmann <[email protected]>

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ARM: Kconfig: clean up platform selection

The top-level platform selection is mostly meaningless these days after
almost everything is sorted below the CONFIG_ARCH_MULTIPLATFORM, with
the only excep

ARM: Kconfig: clean up platform selection

The top-level platform selection is mostly meaningless these days after
almost everything is sorted below the CONFIG_ARCH_MULTIPLATFORM, with
the only exception being the 20+ year old StrongARM based machines.

Make this more consistent by removing the entire choice statement and
moving the StrongARM specific options into regular platform specific
Kconfig files.

The three platforms (footbridge, rpc and sa1100) are still mutually
exclusive and cannot coexist with other ARMv4/v5 machines, but since
there are only three of them and we will not add more, this can be
expressed using Kconfig 'depends on' statements.

Signed-off-by: Arnd Bergmann <[email protected]>

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ARM: debug: bcmbca: Replace ARCH_BCM_63XX with ARCH_BCMBCA

Prepare for the BCM63138 ARCH_BCM_63XX migration to ARCH_BCMBCA. Make
DEBUG_BCM63XX_UART depending on ARCH_BCMBCA.

Signed-off-by: William

ARM: debug: bcmbca: Replace ARCH_BCM_63XX with ARCH_BCMBCA

Prepare for the BCM63138 ARCH_BCM_63XX migration to ARCH_BCMBCA. Make
DEBUG_BCM63XX_UART depending on ARCH_BCMBCA.

Signed-off-by: William Zhang <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>

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ARM: at91: debug: add lan966 support

Add support for low-level debugging on FLEXCOM USART of
LAN966 SoC.

Signed-off-by: Kavyasree Kotagiri <[email protected]>
Reviewed-by: Michael Wa

ARM: at91: debug: add lan966 support

Add support for low-level debugging on FLEXCOM USART of
LAN966 SoC.

Signed-off-by: Kavyasree Kotagiri <[email protected]>
Reviewed-by: Michael Walle <[email protected]>
Tested-by: Michael Walle <[email protected]>
Signed-off-by: Nicolas Ferre <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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ARM: omap1: relocate static I/O mapping

The address range 0xfee00000-0xfeffffff is used for PCI and
PCMCIA I/O port mappings, but OMAP1 has its static mappings
there as well.

Move the OMAP1 address

ARM: omap1: relocate static I/O mapping

The address range 0xfee00000-0xfeffffff is used for PCI and
PCMCIA I/O port mappings, but OMAP1 has its static mappings
there as well.

Move the OMAP1 addresses a little higher to avoid crashing
at boot.

Acked-by: Tony Lindgren <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

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ARM: ftrace: enable the graph tracer with the EABI unwinder

Enable the function graph tracer in combination with the EABI unwinder,
so that Thumb2 builds or Clang ARM builds can make use of it.

Thi

ARM: ftrace: enable the graph tracer with the EABI unwinder

Enable the function graph tracer in combination with the EABI unwinder,
so that Thumb2 builds or Clang ARM builds can make use of it.

This involves using the unwinder to locate the return address of an
instrumented function on the stack, so that it can be overridden and
made to refer to the ftrace handling routines that need to be called at
function return.

Given that for these builds, it is not guaranteed that the value of the
link register is stored on the stack, fall back to the stack slot that
will be used by the ftrace exit code to restore LR in the instrumented
function's execution context.

Signed-off-by: Ard Biesheuvel <[email protected]>
Reviewed-by: Steven Rostedt (Google) <[email protected]>

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ARM: reduce the information printed in call traces

A while back, Linus complained about the numeric values printed by the
ARM backtracing code. Printing these values does not make sense if one
does

ARM: reduce the information printed in call traces

A while back, Linus complained about the numeric values printed by the
ARM backtracing code. Printing these values does not make sense if one
does not have access to the kernel ELF image (as is normally the case
when helping a third party on a mailing list), but if one does, they
can be very useful to find the code, rather than searching for the
function name, and then doing hex math to work out where the backtrace
entry is referring to.

Provide an option to control whether this information is included,
which will only be visible if EXPERT is enabled.

Signed-off-by: Russell King <[email protected]>

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Revert "ARM: 9070/1: Make UNWINDER_ARM depend on ld.bfd or ld.lld 11.0.0+"

This reverts commit 7411cfc3c91a08a884463bbc7623087ecc2efdd8.

The minimum supported version of LLVM has been raised to 11.

Revert "ARM: 9070/1: Make UNWINDER_ARM depend on ld.bfd or ld.lld 11.0.0+"

This reverts commit 7411cfc3c91a08a884463bbc7623087ecc2efdd8.

The minimum supported version of LLVM has been raised to 11.0.0, meaning
this check is always true, so it can be dropped.

Signed-off-by: Nathan Chancellor <[email protected]>
Reviewed-by: Miguel Ojeda <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Reviewed-by: Nick Desaulniers <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

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ARM: imx: rename DEBUG_IMX21_IMX27_UART to DEBUG_IMX27_UART

Since commit 4b563a066611 ("ARM: imx: Remove imx21 support"), the config
DEBUG_IMX21_IMX27_UART is really only debug support for IMX27.

S

ARM: imx: rename DEBUG_IMX21_IMX27_UART to DEBUG_IMX27_UART

Since commit 4b563a066611 ("ARM: imx: Remove imx21 support"), the config
DEBUG_IMX21_IMX27_UART is really only debug support for IMX27.

So, rename this option to DEBUG_IMX27_UART and adjust dependencies in
Kconfig and rename the definitions to IMX27 as further clean-up.

This issue was discovered with ./scripts/checkkconfigsymbols.py, which
reported that DEBUG_IMX21_IMX27_UART depends on the non-existing config
SOC_IMX21.

Signed-off-by: Lukas Bulwahn <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
Signed-off-by: Shawn Guo <[email protected]>

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ARM: at91: debug: add sama7g5 low level debug uart

Add sama7g5 SoC debug uart on Flexcom3. This is the UART that the
ROM bootloader uses.

Signed-off-by: Eugen Hristev <[email protected]>

ARM: at91: debug: add sama7g5 low level debug uart

Add sama7g5 SoC debug uart on Flexcom3. This is the UART that the
ROM bootloader uses.

Signed-off-by: Eugen Hristev <[email protected]>
Signed-off-by: Nicolas Ferre <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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ARM/ixp4xx: Move the virtual IObases

UART1, UART2 and the expansion bus config registers
are the only registers mapped in a fixed location
when using device tree.

For device tree we also want to ge

ARM/ixp4xx: Move the virtual IObases

UART1, UART2 and the expansion bus config registers
are the only registers mapped in a fixed location
when using device tree.

For device tree we also want to get rid of the custom
<mach/io.h> for IXP4xx. So we need to undefine
CONFIG_NEED_MACH_IO_H. Doing that activates the fixed
mapping of the PCI IO space to PCI_IO_VIRT_BASE which
is hardcoded to 0xFEE00000 and this would collide with
the old fixed mappings.

Move the fixed virtual IO base address from 0xFEF00000
to 0xFEC00000 in order to avoid the collision.

For the OF-only boot path let's even cut the reliance
on <mach/io.h> and just hardcode the one single virtbase
we need apart from the UART, which is hardcoded in
Kconfig.debug.

Cc: Arnd Bergmann <[email protected]>
Cc: Imre Kaloz <[email protected]>
Cc: Krzysztof Halasa <[email protected]>
Cc: Zoltan HERPAI <[email protected]>
Cc: Raylynn Knight <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>

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ARM: debug: add UART early console support for MSTAR SoCs

This adds the debug_ll uart for the PM UART found on armv7-based MStar
SoCs.

Signed-off-by: Romain Perier <[email protected]>
Acked-b

ARM: debug: add UART early console support for MSTAR SoCs

This adds the debug_ll uart for the PM UART found on armv7-based MStar
SoCs.

Signed-off-by: Romain Perier <[email protected]>
Acked-by: Daniel Palmer <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Tested-by: Mohammed Billoo <[email protected]>
Signed-off-by: Daniel Palmer <[email protected]>
Signed-off-by: Olof Johansson <[email protected]>

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ARM: 9070/1: Make UNWINDER_ARM depend on ld.bfd or ld.lld 11.0.0+

When linking aspeed_g5_defconfig with ld.lld 10.0.1, the following error
occurs:

ld.lld: error: .tmp_vmlinux.kallsyms1:(.ARM.exidx+

ARM: 9070/1: Make UNWINDER_ARM depend on ld.bfd or ld.lld 11.0.0+

When linking aspeed_g5_defconfig with ld.lld 10.0.1, the following error
occurs:

ld.lld: error: .tmp_vmlinux.kallsyms1:(.ARM.exidx+0x34D98): relocation
R_ARM_PREL31 out of range: 2135538592 is not in [-1073741824,
1073741823]

This was resolved in ld.lld 11.0.0 but the minimum supported version of
ld.lld for the kernel is 10.0.1. Prevent CONFIG_UNWINDER_ARM from being
selected in this case so that the problematic sections cannot be
created.

Link: https://github.com/ClangBuiltLinux/linux/issues/732
Link: https://github.com/llvm/llvm-project/commit/48aebfc908ba7b9372aaa478a9c200789491096e

Suggested-by: Nick Desaulniers <[email protected]>
Signed-off-by: Nathan Chancellor <[email protected]>
Reviewed-by: Nick Desaulniers <[email protected]>
Signed-off-by: Russell King <[email protected]>

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