|| ||Herbert Xu <herbert-AT-gondor.apana.org.au> |
|| ||Christoph Hellwig <hch-AT-infradead.org> |
|| ||Re: RFC: Crypto API User-interface |
|| ||Tue, 7 Sep 2010 22:11:12 +0800|
|| ||Linux Crypto Mailing List <linux-crypto-AT-vger.kernel.org>,
|| ||Article, Thread
On Tue, Sep 07, 2010 at 10:06:46AM -0400, Christoph Hellwig wrote:
> On Tue, Sep 07, 2010 at 04:42:13PM +0800, Herbert Xu wrote:
> > Hi:
> > This is what I am proposing for the Crypto API user-interface.
> Can you explain why we would ever want a userspace interface to it?
> doing crypto in kernel for userspace consumers sis simply insane.
> It's computational intensive code which has no business in kernel space
> unless absolutely required (e.g. for kernel consumers). In addition
> to that adding the context switch overhead and address space transitions
> is god awfull too.
> This all very much sounds like someone had far too much crack.
FWIW I don't care about user-space using kernel software crypto at
all. It's the security people that do.
The purpose of the user-space API is to export the hardware crypto
devices to user-space. This means PCI devices mostly, as things
like aesni-intel can already be used without kernel help.
Now as a side-effect if this means that we can shut the security
people up about adding another interface then all the better. But
I will certainly not go out of the way to add more crap to the
kernel for that purpose.
Email: Herbert Xu <firstname.lastname@example.org>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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