ARM: 7661/1: mm: perform explicit branch predictor maintenance when required

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The ARM ARM requires branch predictor maintenance if, for a given ASID,
the instructions at a specific virtual address appear to change.

From the kernel's point of view, that means:

	- Changing the kernel's view of memory (e.g. switching to the
	  identity map)
	- ASID rollover (since ASIDs will be re-allocated to new tasks)

This patch adds explicit branch predictor maintenance when either of the
two conditions above are met.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

...

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Will Deacon 2013-02-28 17:48:40 +01:00 • committed by Russell King

parent 862c588f06

commit 89c7e4b8bb

4 changed files with 6 additions and 1 deletions

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1

arch/arm/kernel/smp.c

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1

arch/arm/kernel/suspend.c

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4

arch/arm/mm/context.c

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1

arch/arm/mm/idmap.c

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