From: Dave Chinner <david@fromorbit.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>,
lsf-pc@lists.linux-foundation.org,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
"Shutemov, Kirill" <kirill.shutemov@intel.com>,
"Schofield, Alison" <alison.schofield@intel.com>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
Jan Kara <jack@suse.cz>, Christoph Hellwig <hch@infradead.org>,
Theodore Ts'o <tytso@mit.edu>, Jaegeuk Kim <jaegeuk@kernel.org>
Subject: Re: [LSF/MM TOPIC] Memory Encryption on top of filesystems
Date: Thu, 14 Feb 2019 07:21:47 +1100 [thread overview]
Message-ID: <20190213202147.GP20493@dastard> (raw)
In-Reply-To: <a9b9af61-d4cb-46c2-8e98-256565dcf389@intel.com>
On Wed, Feb 13, 2019 at 07:51:12AM -0800, Dave Hansen wrote:
> On 2/12/19 7:31 PM, Dan Williams wrote:
> > Thanks, yes, fscrypt needs a closer look. As far I can see at a quick
> > glance fscrypt has the same physical block inputs for the encryption
> > algorithm as MKTME so it seems it could be crafted as a drop in
> > accelerator for fscrypt for pmem block devices.
>
> One bummer is that we have the platform tweak offsets to worry about.
What's a "platform tweak offset"?
> As far as I know, those are opaque to software and practically prevent
> us from replicating the MKTME hardware's encryption/decryption in software.
We're not trying to replicate the encryption in software, just use
the existing software to manage the keys that get fed to the
hardware so it can do the encrypt/decrypt operations as the data
passes through it.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2019-02-13 20:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-12 16:55 [LSF/MM TOPIC] Memory Encryption on top of filesystems Dave Hansen
2019-02-12 23:51 ` Dave Chinner
2019-02-13 0:27 ` Dan Williams
2019-02-13 2:13 ` Dave Chinner
2019-02-13 3:31 ` Dan Williams
2019-02-13 15:43 ` Theodore Y. Ts'o
2019-02-13 15:51 ` Dave Hansen
2019-02-13 20:21 ` Dave Chinner [this message]
2019-02-13 20:29 ` Dave Hansen
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