ARCv2: smp-boot: wake_flag polling by non-Masters needs to be uncached

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[ Upstream commit 78f824d431 ]

This is needed on HS38 cores, for setting up IO-Coherency aperture properly

The polling could perturb the caches and coherecy fabric which could be
wrong in the small window when Master is setting up IOC aperture etc
in arc_cache_init()

We do it only for ARCv2 based builds to not affect EZChip ARCompact
based platform.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Vineet Gupta 2016-06-21 14:24:33 +05:30 • committed by Greg Kroah-Hartman

parent 8cb6045ec4

commit 2552e2c115

1 changed files with 16 additions and 3 deletions

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arch/arc/kernel/smp.c

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