linux.git/arch/powerpc/kernel/crash_dump.c, branch v5.4.301

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230

2019-06-19T15:09:06+00:00

Based on 2 normalized pattern(s):

  this source code is licensed under the gnu general public license
  version 2 see the file copying for more details

  this source code is licensed under general public license version 2
  see

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 52 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Enrico Weigelt 
Reviewed-by: Allison Randal 
Reviewed-by: Alexios Zavras 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190602204653.449021192@linutronix.de
Signed-off-by: Greg Kroah-Hartman

powerpc: don't use ioremap_prot() nor __ioremap() unless really needed.

2018-10-14T07:04:09+00:00

In many places, ioremap_prot() and __ioremap() can be replaced with
higher level functions like ioremap(), ioremap_coherent(),
ioremap_cache(), ioremap_wc() ...

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman

Replace with globally

2016-12-24T19:46:01+00:00

This was entirely automated, using the script by Al:

  PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*'
  sed -i -e "s!$PATT!#include !" \
        $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)

to do the replacement at the end of the merge window.

Requested-by: Al Viro 
Signed-off-by: Linus Torvalds

powerpc: Remove superfluous bootmem includes

2014-11-09T22:59:26+00:00

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

powerpc/kdump: crash_dump.c needs to include io.h

2014-10-03T08:03:35+00:00

For __ioremap().

Signed-off-by: Michael Ellerman

powerpc/crashdump : Fix page frame number check in copy_oldmem_page

2014-02-28T07:06:25+00:00

In copy_oldmem_page, the current check using max_pfn and min_low_pfn to
decide if the page is backed or not, is not valid when the memory layout is
not continuous.

This happens when running as a QEMU/KVM guest, where RTAS is mapped higher
in the memory. In that case max_pfn points to the end of RTAS, and a hole
between the end of the kdump kernel and RTAS is not backed by PTEs. As a
consequence, the kdump kernel is crashing in copy_oldmem_page when accessing
in a direct way the pages in that hole.

This fix relies on the memblock's service memblock_is_region_memory to
check if the read page is part or not of the directly accessible memory.

Signed-off-by: Laurent Dufour 
Tested-by: Mahesh Salgaonkar 
CC: 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Fix endian issues in crash dump code

2013-12-13T04:48:39+00:00

A couple more device tree properties that need byte swapping.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Remove savemaxmem parameter setup

2013-07-03T23:08:03+00:00

saved_max_pfn is used to know the amount of memory that the previous
kernel used.  And for powerpc, we set saved_max_pfn by passing the kernel
commandline parameter "savemaxmem=".

The only user of saved_max_pfn in powerpc is read_oldmem interface.  Since
we have removed read_oldmem, we don't need this parameter anymore.

Signed-off-by: Zhang Yanfei 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: "Eric W. Biederman" 
Cc: "H. Peter Anvin" 
Cc: Dave Hansen 
Cc: Fenghua Yu 
Cc: Heiko Carstens 
Cc: Martin Schwidefsky 
Cc: Matt Fleming 
Cc: Michael Holzheu 
Cc: Ralf Baechle 
Cc: Tony Luck 
Cc: Vivek Goyal 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm/ppc: use common help functions to free reserved pages

2013-04-29T22:54:30+00:00

Use common help functions to free reserved pages.

Signed-off-by: Jiang Liu 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Anatolij Gustschin 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

powerpc: Rename mapping based RELOCATABLE to DYNAMIC_MEMSTART for BookE

2011-12-20T15:20:19+00:00

The current implementation of CONFIG_RELOCATABLE in BookE is based
on mapping the page aligned kernel load address to KERNELBASE. This
approach however is not enough for platforms, where the TLB page size
is large (e.g, 256M on 44x). So we are renaming the RELOCATABLE used
currently in BookE to DYNAMIC_MEMSTART to reflect the actual method.

The CONFIG_RELOCATABLE for PPC32(BookE) based on processing of the
dynamic relocations will be introduced in the later in the patch series.

This change would allow the use of the old method of RELOCATABLE for
platforms which can afford to enforce the page alignment (platforms with
smaller TLB size).

Changes since v3:

* Introduced a new config, NONSTATIC_KERNEL, to denote a kernel which is
  either a RELOCATABLE or DYNAMIC_MEMSTART(Suggested by: Josh Boyer)

Suggested-by: Scott Wood 
Tested-by: Scott Wood 

Signed-off-by: Suzuki K. Poulose 
Cc: Scott Wood 
Cc: Kumar Gala 
Cc: Josh Boyer 
Cc: Benjamin Herrenschmidt 
Cc: linux ppc dev 
Signed-off-by: Josh Boyer