[PATCH v3 3/7] ARM: KVM: relax cache maintainance when building page tables

Will Deacon will.deacon at arm.com
Tue May 14 09:05:40 EDT 2013

On Tue, May 14, 2013 at 12:11:36PM +0100, Marc Zyngier wrote:
> Patch 5a677ce044f1 (ARM: KVM: switch to a dual-step HYP init code)
> introduced code that flushes page tables to the point of coherency.
> This is overkill (point of unification is enough and already done),
> and actually not required if running on a SMP capable platform
> (the HW PTW can snoop other cpus' L1).
> Remove this code and let ae8a8b9553bd (ARM: 7691/1: mm: kill unused
> TLB_CAN_READ_FROM_L1_CACHE and use ALT_SMP instead) turn it into
> a no-op for SMP ARMv7.
> Reported-by: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Will Deacon <will.deacon at arm.com>
> Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>

Acked-by: Will Deacon <will.deacon at arm.com>


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