parisc: Add qemu fw_cfg interface

When running on qemu, SeaBIOS-hppa stores the iomem address for the
emulated fw_cfg port in PAGE0_>pad0[2/3]. Let the Linux driver
auto-configure the fw_cfg interfa

parisc: Add qemu fw_cfg interface

When running on qemu, SeaBIOS-hppa stores the iomem address for the
emulated fw_cfg port in PAGE0_>pad0[2/3]. Let the Linux driver
auto-configure the fw_cfg interface with it, so that the fw_cfg info
shows up in /sys/firmware/qemu_fw_cfg.

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

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

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 152

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 of the license or at
your option any later version

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[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 __ro_after_init in inventory.c

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

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: Retrieve and display the PDC PAT capabilities

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

parisc: Add Page Deallocation Table (PDT) support

The firmare in most parisc machines maintains a Page Deallocation Table (PDT)
which holds a list of physical memory addresses where hardware detecte

parisc: Add Page Deallocation Table (PDT) support

The firmare in most parisc machines maintains a Page Deallocation Table (PDT)
which holds a list of physical memory addresses where hardware detected memory
errors (single bit and double bit errors).

This patch adds the missing PDC firmware calls and the logic to read the PDT
from firmware, report all current PDT entries and exclude the reported bad
memory from being used by Linux.

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

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parisc: Enhance CPU detection code on PAT machines

This patch fixes the debug code which runs during the inventory scan on
machines with PAT firmware.

Additionally print out the relationship betwee

parisc: Enhance CPU detection code on PAT machines

This patch fixes the debug code which runs during the inventory scan on
machines with PAT firmware.

Additionally print out the relationship between the detected logical CPU
number and it's physical location and physical cpu number.
This leads to information which can be used to feed numa-structures in
the kernel in later patches. An example output is from my single-CPU (2
cores) C8000 machine is:

Logical CPU #0 is physical cpu #0 at 0xffff0000ffff15, hpa 0xfffffffffe780000
Logical CPU #1 is physical cpu #1 at 0xffff0000ffff15, hpa 0xfffffffffe781000

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

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parisc: Fix printk continuations in system detection

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

parisc: Use kmalloc_array() in add_system_map_addresses()

* A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus us

parisc: Use kmalloc_array() in add_system_map_addresses()

* A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "kmalloc_array".

This issue was detected by using the Coccinelle software.

* Replace the specification of a data type by a pointer dereference
to make the corresponding size determination a bit safer according to
the Linux coding style convention.

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

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parisc: Fix interrupt routing for C8000 serial ports

We can't use dev->mod_index for selecting the interrupt routing entry,
because it's not an index into interrupt routing table. It will be even
wr

parisc: Fix interrupt routing for C8000 serial ports

We can't use dev->mod_index for selecting the interrupt routing entry,
because it's not an index into interrupt routing table. It will be even
wrong on a machine with 2 CPUs (4 cores). But all needed information is
contained in the PAT entries for the serial ports. mod[0] contains the
iosapic address and mod_info has some indications for the interrupt
input (at least it looks like it). This patch implements the searching
for the right iosapic and uses this interrupt input information.

Signed-off-by: Thomas Bogendoerfer <[email protected]>
Cc: <[email protected]> # 3.10
Signed-off-by: Helge Deller <[email protected]>

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parisc: fix possible memory leak in pat_query_module()

pa_pdc_cell has been allocated in this function and so should be
freed before leaving from the error handling cases.

spatch with a semantic ma

parisc: fix possible memory leak in pat_query_module()

pa_pdc_cell has been allocated in this function and so should be
freed before leaving from the error handling cases.

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

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

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Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <[email protected]>

parisc: inventory.c, fix bloated stack frame

The pa_pdc_cell struct can be kmalloc'd, so do that
instead.

Signed-off-by: Kyle McMartin <[email protected]>

parisc: replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <[email protected]>
Cc: Kyle McMartin <[email protected]>
Cc: Mat

parisc: replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <[email protected]>
Cc: Kyle McMartin <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Grant Grundler <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Kyle McMartin <[email protected]>

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[PARISC] use CONFIG_64BIT instead of __LP64__

- additionally update my copyright timestamps

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

[PARISC] Add __read_mostly section for parisc

Flag a whole bunch of things as __read_mostly on parisc. Also flag a few
branches as unlikely() and cleanup a bit of code.

Signed-off-by: Helge Deller

[PARISC] Add __read_mostly section for parisc

Flag a whole bunch of things as __read_mostly on parisc. Also flag a few
branches as unlikely() and cleanup a bit of code.

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

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[PARISC] Return PDC_OK when alloc_pa_dev fails to enumerate all devices

Return PDC_OK when device registration fails so that we enumerate all
subsequent devices, even when we get two devices with th

[PARISC] Return PDC_OK when alloc_pa_dev fails to enumerate all devices

Return PDC_OK when device registration fails so that we enumerate all
subsequent devices, even when we get two devices with the same hardware
path (which should never happen, but does with at least one revision of
rp8400 firmware).

Signed-off-by: Matthew Wilcox <[email protected]>
Signed-off-by: Kyle McMartin <[email protected]>

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Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in

Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

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