linux-kernel - Re: [PATCH, RFC 45/62] mm: Add the encrypt

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Message-ID: <8dc08b4c-82ee-8458-6941-248141afa2a3@intel.com>
Date:   Tue, 18 Jun 2019 07:19:46 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Andy Lutomirski <luto@...nel.org>,
        Kai Huang <kai.huang@...ux.intel.com>
Cc:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        X86 ML <x86@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        David Howells <dhowells@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Alison Schofield <alison.schofield@...el.com>,
        Linux-MM <linux-mm@...ck.org>, kvm list <kvm@...r.kernel.org>,
        keyrings@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: [PATCH, RFC 45/62] mm: Add the encrypt_mprotect() system call for
 MKTME

On 6/17/19 6:50 PM, Andy Lutomirski wrote:
> I'm also wondering whether the kernel will always be able to be a
> one-stop shop for key allocation -- if the MKTME hardware gains
> interesting new uses down the road, who knows how key allocation will
> work?

I can't share all the details on LKML, of course, but I can at least say
that this model of allocating KeyID slots will continue to be used for a
number of generations.