Re: [PATCH v4 4/5] arm64: Verify CPU errata work arounds on hotplugged CPU

From: Suzuki K Poulose
Date: Fri Apr 22 2016 - 09:44:07 EST


On 22/04/16 14:40, Catalin Marinas wrote:
On Fri, Apr 22, 2016 at 12:25:34PM +0100, Suzuki K. Poulose wrote:
CPU Errata work arounds are detected and applied to the
kernel code at boot time and the data is then freed up.
If a new hotplugged CPU requires a work around which
was not applied at boot time, there is nothing we can
do but simply fail the booting.

Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Andre Przywara <andre.przywara@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>

I think Will commented on this previously. Was a decision made to leave
this patch as it is and subsequently add support for enabling local
workarounds for hot-plugged CPUs? I'm fine with this given that most

Yes. Applying work arounds for a hot-plugged CPU will be addressed in a
new series. I updated the cover letter, but missed to update the same here.


Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>

Thanks
Suzuki