linux-stable.git/arch/powerpc/kernel/setup-common.c, branch v5.2

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

2019-05-30T18:26:32+00:00

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 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman

powerpc/setup: replace ifdefs by IS_ENABLED() wherever possible.

2019-05-02T15:58:11+00:00

Compared to ifdefs, IS_ENABLED() provide a cleaner code and allows
to detect compilation failure regardless of the selected options.

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

powerpc/setup: cleanup the #ifdef CONFIG_TAU block

2019-05-02T15:58:11+00:00

Use cpu_has_feature() instead of opencoding

Use IS_ENABLED() instead of #ifdef for CONFIG_TAU_AVERAGE

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

powerpc/setup: cleanup ifdef mess in check_cache_coherency()

2019-05-02T15:58:11+00:00

Use IS_ENABLED() instead of #ifdefs

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

powerpc/setup: Remove unnecessary #ifdef CONFIG_ALTIVEC

2019-05-02T15:58:11+00:00

CPU_FTR_ALTIVEC is only set when CONFIG_ALTIVEC is selected, so
the ifdef is unnecessary.

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

powerpc/mm: define an empty mm_iommu_init()

2019-05-02T15:58:11+00:00

To avoid ifdefs, define a empty static inline mm_iommu_init() function
when CONFIG_SPAPR_TCE_IOMMU is not selected.

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

powerpc/fadump: define an empty fadump_cleanup()

2019-05-02T15:58:10+00:00

To avoid #ifdefs, define an static inline fadump_cleanup() function
when CONFIG_FADUMP is not selected

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

powerpc/mm: print hash info in a helper

2019-05-02T15:20:26+00:00

Reduce #ifdef mess by defining a helper to print
hash info at startup.

In the meantime, remove the display of hash table address
to reduce leak of non necessary information.

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

powerpc/32: Add KASAN support

2019-05-02T15:20:26+00:00

This patch adds KASAN support for PPC32. The following patch
will add an early activation of hash table for book3s. Until
then, a warning will be raised if trying to use KASAN on an
hash 6xx.

To support KASAN, this patch initialises that MMU mapings for
accessing to the KASAN shadow area defined in a previous patch.

An early mapping is set as soon as the kernel code has been
relocated at its definitive place.

Then the definitive mapping is set once paging is initialised.

For modules, the shadow area is allocated at module_alloc().

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

powerpc/mm: fix erroneous duplicate slb_addr_limit init

2019-05-02T15:20:22+00:00

Commit 67fda38f0d68 ("powerpc/mm: Move slb_addr_linit to
early_init_mmu") moved slb_addr_limit init out of setup_arch().

Commit 701101865f5d ("powerpc/mm: Reduce memory usage for mm_context_t
for radix") brought it back into setup_arch() by error.

This patch reverts that erroneous regress.

Fixes: 701101865f5d ("powerpc/mm: Reduce memory usage for mm_context_t for radix")
Signed-off-by: Christophe Leroy 
Reviewed-by: Aneesh Kumar K.V 
Signed-off-by: Michael Ellerman