linux-kernel - Re: [PATCH v2 4/7] tpm: infrastructure for TPM spaces

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Message-ID: <20170224170238.pfkx7vgkgp7t34wi@intel.com>
Date:   Fri, 24 Feb 2017 19:02:38 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     James Bottomley <James.Bottomley@...senPartnership.com>
Cc:     tpmdd-devel@...ts.sourceforge.net,
        linux-security-module@...r.kernel.org, dhowells@...hat.com,
        Peter Huewe <peterhuewe@....de>,
        Marcel Selhorst <tpmdd@...horst.net>,
        Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/7] tpm: infrastructure for TPM spaces

On Fri, Feb 24, 2017 at 07:53:22AM -0500, James Bottomley wrote:
> On Thu, 2017-02-16 at 21:25 +0200, Jarkko Sakkinen wrote:
> > Added an ability to virtualize TPM commands into an isolated context
> > that we call a TPM space because the word context is already heavily
> > used in the TPM specification. Both the handle areas and bodies
> > (where
> > necessary) are virtualized.
> > 
> > The mechanism works by adding a new parameter struct tpm_space to the
> > tpm_transmit() function. This new structure contains the list of
> > virtual
> > handles and a buffer of page size (currently) for backing storage.
> > 
> > When tpm_transmit() is called with a struct tpm_space instance it
> > will
> > execute the following sequence:
> > 
> > 1. Take locks.
> > 2. Load transient objects from the backing storage by using
> > ContextLoad
> >    and map virtual handles to physical handles.
> > 3. Perform the transaction.
> > 4. Save transient objects to backing storage by using ContextSave and
> >    map resulting physical handle to virtual handle if there is such.
> > 
> > This commit does not implement virtualization support for hmac and
> > policy sessions.
> > 
> > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> 
> For patches 1-4 you can add 
> 
> Reviewed-by: James Bottomley <James.Bottomley@...senPartnership.com>
> 
> Just re-running a build with the latest kernel for my laptop to add
> tested by.
> 
> James

Thank you!

/Jarkko