kernel.git/arch/powerpc/kernel/rtas_pci.c, branch linux-rolling-stable

powerpc/rtas_pci: rename and properly expose config access APIs

2023-11-28T10:49:45Z

The rtas_read_config() and rtas_write_config() functions in kernel/rtas_pci.c have external linkage and two users in arch/powerpc: the rtas_pci code itself and the pseries platform's "enhanced error handling" (EEH) support code. The prototypes for these functions in asm/ppc-pci.h have until now been guarded by CONFIG_EEH since the only external caller is the pseries EEH code. However, this presumably has always generated warnings when built with !CONFIG_EEH and -Wmissing-prototypes: arch/powerpc/kernel/rtas_pci.c:46:5: error: no previous prototype for function 'rtas_read_config' [-Werror,-Wmissing-prototypes] 46 | int rtas_read_config(struct pci_dn *pdn, int where, int size, u32 *val) arch/powerpc/kernel/rtas_pci.c:98:5: error: no previous prototype for function 'rtas_write_config' [-Werror,-Wmissing-prototypes] 98 | int rtas_write_config(struct pci_dn *pdn, int where, int size, u32 val) The introduction of commit c6345dfa6e3e ("Makefile.extrawarn: turn on missing-prototypes globally") forces the issue. The efika and chrp platform code have (static) functions with the same names but different signatures. We may as well eliminate the potential for conflicts and confusion by renaming the globally visible versions as their prototypes get moved out of the CONFIG_EEH-guarded region; their current names are too generic anyway. Since they operate on objects of the type 'struct pci_dn *', give them the slightly more verbose prefix "rtas_pci_dn_" and fix up all the call sites. Fixes: c6345dfa6e3e ("Makefile.extrawarn: turn on missing-prototypes globally") Reported-by: Linux Kernel Functional Testing Closes: https://lore.kernel.org/linuxppc-dev/CA+G9fYt0LLXtjSz+Hkf3Fhm-kf0ZQanrhUS+zVZGa3O+Wt2+vg@mail.gmail.com/ Signed-off-by: Nathan Lynch Signed-off-by: Michael Ellerman Link: https://msgid.link/20231127-rtas-pci-rw-config-v1-1-385d29ace3df@linux.ibm.com

powerpc/rtas: arch-wide function token lookup conversions

2023-02-13T11:35:03Z

With the tokens for all implemented RTAS functions now available via rtas_function_token(), which is optimal and safe for arbitrary contexts, there is no need to use rtas_token() or cache its result. Most conversions are trivial, but a few are worth describing in more detail: * Error injection token comparisons for lockdown purposes are consolidated into a simple predicate: token_is_restricted_errinjct(). * A couple of special cases in block_rtas_call() do not use rtas_token() but perform string comparisons against names in the function table. These are converted to compare against token values instead, which is logically equivalent but less expensive. * The lookup for the ibm,os-term token can be deferred until needed, instead of caching it at boot to avoid device tree traversal during panic. * Since rtas_function_token() accesses a read-only data structure without taking any locks, xmon's lookup of set-indicator can be performed as needed instead of cached at startup. Signed-off-by: Nathan Lynch Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20230125-b4-powerpc-rtas-queue-v3-20-26929c8cce78@linux.ibm.com

powerpc: Add missing headers

2022-05-08T12:15:40Z

Don't inherit headers "by chances" from asm/prom.h, asm/mpc52xx.h, asm/pci.h etc... Include the needed headers, and remove asm/prom.h when it was needed exclusively for pulling necessary headers. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/be8bdc934d152a7d8ee8d1a840d5596e2f7d85e0.1646767214.git.christophe.leroy@csgroup.eu

mm: reorder includes after introduction of linux/pgtable.h

2020-06-09T16:39:13Z

The replacement of with made the include of the latter in the middle of asm includes. Fix this up with the aid of the below script and manual adjustments here and there. import sys import re if len(sys.argv) is not 3: print "USAGE: %s

" % (sys.argv[0]) sys.exit(1) hdr_to_move="#include " % sys.argv[2] moved = False in_hdrs = False with open(sys.argv[1], "r") as f: lines = f.readlines() for _line in lines: line = _line.rstrip(' ') if line == hdr_to_move: continue if line.startswith("#include Signed-off-by: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brian Cain Cc: Catalin Marinas Cc: Chris Zankel Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Ungerer Cc: Guan Xuetao Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ley Foon Tan Cc: Mark Salter Cc: Matthew Wilcox Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Nick Hu Cc: Paul Walmsley Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Tony Luck Cc: Vincent Chen Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Link: http://lkml.kernel.org/r/20200514170327.31389-4-rppt@kernel.org Signed-off-by: Linus Torvalds

mm: introduce include/linux/pgtable.h

2020-06-09T16:39:13Z

The include/linux/pgtable.h is going to be the home of generic page table manipulation functions. Start with moving asm-generic/pgtable.h to include/linux/pgtable.h and make the latter include asm/pgtable.h. Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brian Cain Cc: Catalin Marinas Cc: Chris Zankel Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Ungerer Cc: Guan Xuetao Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ley Foon Tan Cc: Mark Salter Cc: Matthew Wilcox Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Nick Hu Cc: Paul Walmsley Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Tony Luck Cc: Vincent Chen Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Link: http://lkml.kernel.org/r/20200514170327.31389-3-rppt@kernel.org Signed-off-by: Linus Torvalds

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156

2019-05-30T18:26:35Z

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 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 59 temple place suite 330 boston ma 02111 1307 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 1334 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Richard Fontana Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman

powerpc/kernel: Change retrieval of pci_dn

2017-08-31T04:26:40Z

For a PCI device it's pci_dn can be retrieved from pdev->dev.archdata.firmware_data, PCI_DN(devnode), or parent's list. Thus, we should just use the existing function pci_get_pdn_by_devfn to get the pci_dn. Signed-off-by: Bryant G. Ly Reviewed-by: Sam Bobroff Signed-off-by: Michael Ellerman

powerpc: move find_and_init_phbs() to pSeries specific code

2015-04-11T10:49:09Z

Previously, find_and_init_phbs() was used in both PowerNV and pSeries setup. However, since RTAS support has been dropped from PowerNV, we can move it into a platform-specific file. Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman

powerpc/eeh: Remove device_node dependency

2015-03-24T02:15:53Z

The patch removes struct eeh_dev::dn and the corresponding helper functions: eeh_dev_to_of_node() and of_node_to_eeh_dev(). Instead, eeh_dev_to_pdn() and pdn_to_eeh_dev() should be used to get the pdn, which might contain device_node on PowerNV platform. Signed-off-by: Gavin Shan Signed-off-by: Benjamin Herrenschmidt

powerpc: Remove superfluous bootmem includes

2014-11-09T22:59:26Z

Lots of places included bootmem.h even when not using bootmem. Signed-off-by: Anton Blanchard Tested-by: Emil Medve Signed-off-by: Michael Ellerman