Re: [RFC PATCH v2 10/20] x86: Insure that memory areas are encrypted when possible

[Borislav Petkov]

On Mon, Sep 12, 2016 at 10:05:36AM -0500, Tom Lendacky wrote:
> I can look into that.  The reason I put this here is this is all the
> early page fault support that is very specific to this file. I modified
> an existing static function to take advantage of the mapping support.

Yeah, but all this code is SME-specific and doesn't belong there.
AFAICT, it uses global/public symbols so there shouldn't be a problem to
have it in mem_encrypt.c.

> Hmmm, maybe... With the change to the early_memremap() the initrd is now
> identified as BOOT_DATA in relocate_initrd() and so it will be mapped
> and copied as non-encyrpted data. But since it was encrypted before the
> call to relocate_initrd() it will copy encrypted bytes which will later
> be accessed encrypted. That isn't clear though, so I'll rework
> reserve_initrd() to perform the sme_early_mem_enc() once at the end
> whether the initrd is re-located or not.

Makes sense.

-- 
Regards/Gruss,
    Boris.

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