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Vineet Gupta 72d861f2d2 ARC: boot log: eliminate struct cpuinfo_arc #1 : mm

This is first step in eliminating struct cpuinfo_arc[NR_CPUS]

Back when we had just ARCompact ISA, the idea was to read/bit-fiddle
the BCRs once and and cache decoded information in a global struct ready
to use.

With ARCv2 it was modified to contained abstract / ISA agnostic
information.

However with ARCv3 there 's too much disparity to abstract in common
structures. So drop the entire decode once and store paradigm. Afterall
there's only 2 users of this machinery anyways:  boot printing and
cat /proc/cpuinfo. None is performance critical to warrant locking away
resident memory per cpu.

This patch is first step in that direction
 - decouples struct cpuinfo_arc_mmu from global struct cpuinfo_arc
 - mmu code still has a trimmed down static version of
   struct cpuinfo_arc_mmu to cache information needed in performance
   critical code such as tlb flush routines
 - folds read_decode_mmu_bcr() into arc_mmu_mumbojumbo()
 - setup_processor() directly calls arc_mmu_init() and not via
   arc_cpu_init()

Tested-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308151213.qKZPMiyz-lkp@intel.com/
Signed-off-by: Vineet Gupta <vgupta@kernel.org>

2023-08-17 20:31:57 -07:00

cache.c

ARC: -Wmissing-prototype warning fixes

2023-08-13 16:53:02 -07:00

dma.c

arc: Replace lkml.org links with lore

2021-12-28 19:48:49 -08:00

extable.c

ARC: uaccess: remove arc specific out-of-line handles for -Os

2023-08-17 12:40:26 -07:00

fault.c

ARC: -Wmissing-prototype warning fixes