parisc: Move parisc_narrow_firmware variable to header file

Signed-off-by: Helge Deller <[email protected]>

parisc: led: Rewrite LED/LCD driver to utilizize Linux LED subsystem

Rewrite the whole driver and drop the own code to calculate load
average, disk and LAN load. Switch instead to use the in-kernel

parisc: led: Rewrite LED/LCD driver to utilizize Linux LED subsystem

Rewrite the whole driver and drop the own code to calculate load
average, disk and LAN load. Switch instead to use the in-kernel LED
subsystem, which gives us quite some advantages, e.g.
- existing triggers for heartbeat and disk/lan activity can be used
- users can configre the LEDs at will to any existing trigger via
/sys/class/leds
- less overhead since we don't need to run own timers
- fully integrated in Linux and as such cleaner code.

Note that the driver now depends on CONFIG_LEDS_CLASS which has to
be built-in and not as module.

Signed-off-by: Helge Deller <[email protected]>

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parisc: iosapic: Convert I/O Sapic driver to use arch_initcall()

Signed-off-by: Helge Deller <[email protected]>

parisc: sba_iommu: Convert SBA IOMMU driver to use arch_initcall()

Signed-off-by: Helge Deller <[email protected]>

parisc: led: Move register_led_regions() to late_initcall()

Signed-off-by: Helge Deller <[email protected]>

parisc: lba: Convert LBA PCI bus driver to use arch_initcall()

Signed-off-by: Helge Deller <[email protected]>

parisc: gsc: Convert GSC bus driver to use arch_initcall()

This conversion includes LASI, ASP and WAX drivers for now.

Signed-off-by: Helge Deller <[email protected]>

parisc: ccio: Convert CCIO driver to use arch_initcall()

Signed-off-by: Helge Deller <[email protected]>

parisc: eisa: Convert HP EISA bus driver to use arch_initcall()

Signed-off-by: Helge Deller <[email protected]>

parisc: hppb: Convert HP PB bus driver to use arch_initcall()

Signed-off-by: Helge Deller <[email protected]>

parisc: dino: Convert dino PCI bus driver to use arch_initcall()

Signed-off-by: Helge Deller <[email protected]>

parisc: Drop the pa7300lc LPMC handler

This was actually never really used, and the info it
prints won't help. Drop it.

Signed-off-by: Helge Deller <[email protected]>

parisc: Move proc_mckinley_root and proc_runway_root to sba_iommu

Clean up the procfs root entries for gsc, runway, and mckinley busses.

Signed-off-by: Helge Deller <[email protected]>

parisc: Move init function declarations into header file

Clean up the code to not have external function declarations
inside the C source files. Reduces warnings when compiled with W=1.

Signed-off-

parisc: Move init function declarations into header file

Clean up the code to not have external function declarations
inside the C source files. Reduces warnings when compiled with W=1.

Signed-off-by: Helge Deller <[email protected]>

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parisc: Fix inconsistent indenting in setup_cmdline()

Fix warning reported by 0-DAY CI Kernel Test Service:
arch/parisc/kernel/setup.c:64 setup_cmdline() warn: inconsistent indenting

Reported-by: k

parisc: Fix inconsistent indenting in setup_cmdline()

Fix warning reported by 0-DAY CI Kernel Test Service:
arch/parisc/kernel/setup.c:64 setup_cmdline() warn: inconsistent indenting

Reported-by: kernel test robot <[email protected]>
Signed-off-by: Helge Deller <[email protected]>

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parisc: Convert PDC console to an early console

Rewrite the PDC console to become an early console.
Beside the fact that now boot information is visible until another
(text- or graphics) console tak

parisc: Convert PDC console to an early console

Rewrite the PDC console to become an early console.
Beside the fact that now boot information is visible until another
(text- or graphics) console takes over, this benefits as well machines
with a yet-unsupported STI console and kgdb.

Signed-off-by: Helge Deller <[email protected]>

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Revert "parisc: Mark sched_clock unstable only if clocks are not syncronized"

This reverts commit d97180ad68bdb7ee10f327205a649bc2f558741d.

It triggers RCU stalls at boot with a 32-bit kernel.

Sig

Revert "parisc: Mark sched_clock unstable only if clocks are not syncronized"

This reverts commit d97180ad68bdb7ee10f327205a649bc2f558741d.

It triggers RCU stalls at boot with a 32-bit kernel.

Signed-off-by: Helge Deller <[email protected]>
Noticed-by: John David Anglin <[email protected]>
Cc: [email protected] # v5.15+

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parisc: Autodetect default output device and set console= kernel parameter

Usually palo (the PA-RISC boot loader) will check at boot time if the
machine/firmware was configured to use the serial lin

parisc: Autodetect default output device and set console= kernel parameter

Usually palo (the PA-RISC boot loader) will check at boot time if the
machine/firmware was configured to use the serial line (ttyS0, SERIAL_x)
or the graphical display (tty0, graph) as default output device and add
the correct "console=ttyS0" or "console=tty0" Linux kernel parameter to
the kernel command line when starting the Linux kernel.

But the kernel could also have been started via the HP-UX boot loader
or directly in qemu, in which cases the console parameter is missing.

This patch fixes this problem by adding the correct console= parameter
if it's missing in the current kernel command line.

Signed-off-by: Helge Deller <[email protected]>

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parisc: Use safer strscpy() in setup_cmdline()

Signed-off-by: Helge Deller <[email protected]>

parisc: Mark sched_clock unstable only if clocks are not syncronized

We check at runtime if the cr16 clocks are stable across CPUs. Only mark
the sched_clock unstable by calling clear_sched_clock_st

parisc: Mark sched_clock unstable only if clocks are not syncronized

We check at runtime if the cr16 clocks are stable across CPUs. Only mark
the sched_clock unstable by calling clear_sched_clock_stable() if we
know that we run on a system which isn't syncronized across CPUs.

Signed-off-by: Helge Deller <[email protected]>

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parisc: Fix typo in setup.c

Signed-off-by: Helge Deller <[email protected]>

arch/parisc/setup: Drop dummy_con initialization

con_init in tty/vt.c will now set conswitchp to dummy_con if it's unset.
Drop it from arch setup code.

Signed-off-by: Arvind Sankar <[email protected]

arch/parisc/setup: Drop dummy_con initialization

con_init in tty/vt.c will now set conswitchp to dummy_con if it's unset.
Drop it from arch setup code.

Signed-off-by: Arvind Sankar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153

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 153

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 either version 2 or at your option any
later version 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 you should have received a
copy of the gnu general public license along with this program if
not write to the free software foundation inc 675 mass ave cambridge
ma 02139 usa

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 77 file(s).

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Armijn Hemel <[email protected]>
Reviewed-by: Richard Fontana <[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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parisc: Use per-pagetable spinlock

PA-RISC uses a global spinlock to protect pagetable updates in the TLB
fault handlers. When multiple cores are taking TLB faults simultaneously,
the cache line con

parisc: Use per-pagetable spinlock

PA-RISC uses a global spinlock to protect pagetable updates in the TLB
fault handlers. When multiple cores are taking TLB faults simultaneously,
the cache line containing the spinlock becomes a bottleneck.

This patch embeds the spinlock in the top level page directory, so that
every process has its own lock. It improves performance by 30% when
doing parallel compilations.

At least on the N class systems, only one PxTLB inter processor
broadcast can be active at any one time on the Merced bus. If a Merced
bus is found, this patch serializes the TLB flushes with the
pa_tlb_flush_lock spinlock.

v1: Initial patch by Mikulas
v2: Added Merced detection by Helge
v3: Revised TLB serialization by Dave & Helge

Signed-off-by: Mikulas Patocka <[email protected]>
Signed-off-by: John David Anglin <[email protected]>
Signed-off-by: Helge Deller <[email protected]>

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parisc: Detect QEMU earlier in boot process

While adding LASI support to QEMU, I noticed that the QEMU detection in
the kernel happens much too late. For example, when a LASI chip is found
by the ke

parisc: Detect QEMU earlier in boot process

While adding LASI support to QEMU, I noticed that the QEMU detection in
the kernel happens much too late. For example, when a LASI chip is found
by the kernel, it registers the LASI LED driver as well. But when we
run on QEMU it makes sense to avoid spending unnecessary CPU cycles, so
we need to access the running_on_QEMU flag earlier than before.

This patch now makes the QEMU detection the fist task of the Linux
kernel by moving it to where the kernel enters the C-coding.

Fixes: 310d82784fb4 ("parisc: qemu idle sleep support")
Signed-off-by: Helge Deller <[email protected]>
Cc: [email protected] # v4.14+

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