On Mon, Nov 9, 2020 at 6:12 AM Jason Gunthorpe <[email protected]> wrote:
>
> Wow, this is surprising
>
> This has been widely backported already, Dan please check??
>
> I thought pgprot_decrypted was a NOP on most x86 platforms -
> sme_me_mask == 0:
>
> #define __sme_set(x)            ((x) | sme_me_mask)
> #define __sme_clr(x)            ((x) & ~sme_me_mask)
>
> ??
>
> Confused how this can be causing DAX issues

Does that correctly preserve the "soft" pte bits? Especially
PTE_DEVMAP that DAX uses?

I'll check...
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