[PATCH v5 01/32] x86: Documentation for AMD Secure Memory Encryption (SME)
bp at alien8.de
Wed Apr 19 08:38:19 PDT 2017
On Wed, Apr 19, 2017 at 09:23:47AM -0500, Tom Lendacky wrote:
> Btw, I tried to update all the subjects and descriptions to be
> more descriptive but I'm sure there is still room for improvement
> so keep the comments on them coming.
No worries there :)
> Note, just because the bit is set in %cr3 doesn't mean the full
> hierarchy is encrypted. Each level in the hierarchy needs to have the
> encryption bit set. So, theoretically, you could have the encryption
> bit set in %cr3 so that the PGD is encrypted, but not set the encryption
> bit in the PGD entry for a PUD and so the PUD pointed to by that entry
> would not be encrypted.
Ha, that is a nice detail I didn't realize. You could add it to the text.
Good mailing practices for 400: avoid top-posting and trim the reply.
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