linux-kernel - Re: [PATCH 2/3] tpm: separate cmd_ready/go_idle from runtime

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180129084221.deudcqbsh22hcrrb@linux.intel.com>
Date:   Mon, 29 Jan 2018 10:42:21 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Jason Gunthorpe <jgg@...pe.ca>
Cc:     Tomas Winkler <tomas.winkler@...el.com>,
        Alexander Usyskin <alexander.usyskin@...el.com>,
        tpmdd-devel@...ts.sourceforge.net, linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] tpm: separate cmd_ready/go_idle from runtime_pm

On Tue, Jan 23, 2018 at 08:33:22AM -0700, Jason Gunthorpe wrote:
> On Tue, Jan 23, 2018 at 03:08:41PM +0200, Jarkko Sakkinen wrote:
> > On Tue, Jan 23, 2018 at 01:27:30PM +0200, Tomas Winkler wrote:
> > > We cannot use go_idle cmd_ready commands via runtime_pm handles
> > > as with the introduction of localities this is no longer an optional
> > > feature, while runtime pm can be not enabled.
> > > Though cmd_ready/go_idle provides power saving feature, it's also part of
> > > TPM2 protocol and should be called explicitly.
> > > This patch exposes cmd_read/go_idle via tpm class ops and removes
> > > runtime pm support as it is not used by any driver.
> > > 
> > > Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
> > 
> > Thank you.
> > 
> > LGTM
> > 
> > Jason, what do you think?
> 
> The PM stuff has been the source of confusion for a while, seems
> reasonable to get rid of it.

I'll test this ASAP.

/Jarkk