Re: [PATCH V4 5/6] arm64: mm: introduce 52-bit userspace support

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On Wed, Dec 05, 2018 at 06:22:27PM +0000, Suzuki K Poulose wrote:
> Hi Steve,
> 
[...] 
> I think we may need a check for the secondary CPUs to make sure that they have
> the 52bit support once the boot CPU has decided to use the feature and fail the
> CPU bring up (just like we do for the granule support).
> 
> Suzuki

Hi Suzuki,
I have just written a patch to detect a mismatch between 52-bit VA that
is being tested now.

As 52-bit kernel VA support is coming in future, the patch checks for a
mismatch during the secondary boot path and, if one is found, prevents
the secondary from booting (and displays an error message to the user).

Cheers,
-- 
Steve





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