riscv: Use do_kernel_power_off()

Kernel now supports chained power-off handlers. Use do_kernel_power_off()
that invokes chained power-off handlers. It also invokes legacy
pm_power_off() for now, whi

riscv: Use do_kernel_power_off()

Kernel now supports chained power-off handlers. Use do_kernel_power_off()
that invokes chained power-off handlers. It also invokes legacy
pm_power_off() for now, which will be removed once all drivers will
be converted to the new sys-off API.

Acked-by: Palmer Dabbelt <[email protected]>
Reviewed-by: Michał Mirosław <[email protected]>
Signed-off-by: Dmitry Osipenko <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

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riscv: set default pm_power_off to NULL

Set pm_power_off to NULL like on all other architectures, check if it
is set in machine_halt() and machine_power_off() and fallback to
default_power_off if no

riscv: set default pm_power_off to NULL

Set pm_power_off to NULL like on all other architectures, check if it
is set in machine_halt() and machine_power_off() and fallback to
default_power_off if no other power driver got registered.

This brings riscv architecture inline with all other architectures,
and allows to reuse exiting power drivers unmodified.

Kernels without legacy SBI v0.1 extensions (CONFIG_RISCV_SBI_V01 is
not set), do not set pm_power_off to sbi_shutdown(). There is no
support for SBI v0.3 system reset extension either. This prevents
using gpio_poweroff on SiFive HiFive Unmatched.

Tested on SiFive HiFive unmatched, with a dtb specifying gpio-poweroff
node and kernel complied without CONFIG_RISCV_SBI_V01.

BugLink: https://bugs.launchpad.net/bugs/1942806
Signed-off-by: Dimitri John Ledkov <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Tested-by: Ron Economos <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>

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riscv: cleanup the default power off implementation

Move the sbi poweroff to a separate function and file that is only
compiled if CONFIG_SBI is set.

Signed-off-by: Christoph Hellwig <[email protected]>
R

riscv: cleanup the default power off implementation

Move the sbi poweroff to a separate function and file that is only
compiled if CONFIG_SBI is set.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
[[email protected]: split the WFI fix into a separate patch]
Signed-off-by: Paul Walmsley <[email protected]>

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riscv: enter WFI in default_power_off() if SBI does not shutdown

Provide a new default fallback power off that just sits in a wfi loop
to save some power.

Signed-off-by: Christoph Hellwig <hch@lst.

riscv: enter WFI in default_power_off() if SBI does not shutdown

Provide a new default fallback power off that just sits in a wfi loop
to save some power.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
[[email protected]: split the WFI fix apart from the
nommu-related default_power_off() changes]
Signed-off-by: Paul Walmsley <[email protected]>

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riscv: add missing header file includes

sparse identifies several missing prototypes caused by missing
preprocessor include directives:

arch/riscv/kernel/cpufeature.c:16:6: warning: symbol 'has_fpu

riscv: add missing header file includes

sparse identifies several missing prototypes caused by missing
preprocessor include directives:

arch/riscv/kernel/cpufeature.c:16:6: warning: symbol 'has_fpu' was not declared. Should it be static?
arch/riscv/kernel/process.c:26:6: warning: symbol 'arch_cpu_idle' was not declared. Should it be static?
arch/riscv/kernel/reset.c:15:6: warning: symbol 'pm_power_off' was not declared. Should it be static?
arch/riscv/kernel/syscall_table.c:15:6: warning: symbol 'sys_call_table' was not declared. Should it be static?
arch/riscv/kernel/traps.c:149:13: warning: symbol 'trap_init' was not declared. Should it be static?
arch/riscv/kernel/vdso.c:54:5: warning: symbol 'arch_setup_additional_pages' was not declared. Should it be static?
arch/riscv/kernel/smp.c:64:6: warning: symbol 'arch_match_cpu_phys_id' was not declared. Should it be static?
arch/riscv/kernel/module-sections.c:89:5: warning: symbol 'module_frob_arch_sections' was not declared. Should it be static?
arch/riscv/mm/context.c:42:6: warning: symbol 'switch_mm' was not declared. Should it be static?

Fix by including the appropriate header files in the appropriate
source files.

This patch should have no functional impact.

Signed-off-by: Paul Walmsley <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>

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riscv: export pm_power_off again

Commit bf0102a0fdd9 ("riscv: call pm_power_off from machine_halt /
machine_power_off") removed the export of pm_power_off, but it is used by
several modules:

ER

riscv: export pm_power_off again

Commit bf0102a0fdd9 ("riscv: call pm_power_off from machine_halt /
machine_power_off") removed the export of pm_power_off, but it is used by
several modules:

ERROR: "pm_power_off" [drivers/mfd/rk808.ko] undefined!
ERROR: "pm_power_off" [drivers/mfd/max8907.ko] undefined!
ERROR: "pm_power_off" [drivers/mfd/axp20x.ko] undefined!
ERROR: "pm_power_off" [drivers/char/ipmi/ipmi_poweroff.ko] undefined!

Signed-off-by: Andreas Schwab <[email protected]>
Fixes: bf0102a0fdd9 ("riscv: call pm_power_off from machine_halt / machine_power_off")
Signed-off-by: Paul Walmsley <[email protected]>

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of th

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation version 2 this program is distributed
in the hope that it will be useful but without any warranty without
even the implied warranty of merchantability or fitness for a
particular purpose see the gnu general public license for more
details

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 97 file(s).

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Alexios Zavras <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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riscv: call pm_power_off from machine_halt / machine_power_off

This way any override of pm_power_off also affects the halt path and
we don't need additional infrastructure for it.

Also remove the p

riscv: call pm_power_off from machine_halt / machine_power_off

This way any override of pm_power_off also affects the halt path and
we don't need additional infrastructure for it.

Also remove the pm_power_off export - at least for now we don't have
any modular drivers overriding it.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>

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RISC-V: Init and Halt Code

This contains the various __init C functions, the initial assembly
kernel entry point, and the code to reset the system. When a file was
init-related this patch contains

RISC-V: Init and Halt Code

This contains the various __init C functions, the initial assembly
kernel entry point, and the code to reset the system. When a file was
init-related this patch contains the entire file.

Signed-off-by: Palmer Dabbelt <[email protected]>

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