[PATCH] ARM: save/restore diagnostic register on ARMv7 suspend/resume

Will Deacon will.deacon at arm.com
Wed Jun 18 03:40:09 PDT 2014

On Wed, Jun 18, 2014 at 09:49:58AM +0100, Shawn Guo wrote:
> The CP15 diagnostic register holds ARM errata bits on ARMv7, so it
> needs to be saved/restored on suspend/resume.  Otherwise, the
> effectiveness of errata workaround gets lost together with diagnostic
> register bit across suspend/resume cycle.

This should be conditional on Cortex-A9, since this register is certainly
not architected.


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