From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7C0F21ACEDE; Tue, 2 Jun 2026 01:50:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780365047; cv=none; b=uQzB+Jv4Eg0+l4zezz5MlGNQ22OfY7e+LnL+yk+tYHO/WolYZ6u5k9S1jO26+KnCthKHZwLCQSS1Trl2VeCopbko/js872M/Pv4oN9XqxGHLhyxqZk7kg8dYeBuzlgBmN2ooNrtChltt7F7YH0tNkKzxu6jq8BTByL9rdcndsxw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780365047; c=relaxed/simple; bh=zjpROYhkv6ZYiY7+Byc6WoPsysk9vGK66c47RsmtsG4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=LE4bO1rcm9S5+V65HyhEqmh6N8tTSTmZObkaZlwhOdK/xGb4TBhFLG/p0+JX+V4AyBmulNWUe6SO5+YaWzWAwFPGuQOCZf4tbToKDlG9ht13icxs14q8tfz6Fk9m76CKs1vrDK5+GunIbZhq+c7wVNHGvhKY9MdwhvQga38JPYU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nyDhdaD6; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nyDhdaD6" Received: by smtp.kernel.org (Postfix) with UTF8SMTPSA id 94B231F00893; Tue, 2 Jun 2026 01:50:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780365046; bh=FN5FlhYdg79vt7KtEH0ZvyAfPgBM35pRN/zhQHoAqzA=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=nyDhdaD6kzDTA/hmp/0voT4t+zFFwSstXivRmi4f25Hoo3Ti/KV/yTvLKbttMXqrb 88JZUTyfc54w0bENvrmK1RcH3/8388GGA6nxNo+Q7yJ7VY9rzrGEUP1qzx8jwdQWuZ Bh9DAx2qPsD6RNOHtzI3KuaK5xi8g4fZQYvdc4tLfuZZhkRB9X/WOF0uOx+2sct7z9 ApSpDFmm0KWxC6PHrlhBxWYIgQJXeoay1pA+ZGZd28ecBFMjKlqmPs8dYtsjNLNPFN fSyC69N2LcI7vX/U6EYAJljHJrzuLAudxd768Xe34/ceEokg2x2BfeClEdTk/qyHTW LK0l3hcjb8WCA== Date: Tue, 2 Jun 2026 04:50:42 +0300 From: Jarkko Sakkinen To: Sudeep Holla Cc: Yeoreum Yun , linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, linux-integrity@vger.kernel.org, paul@paul-moore.com, zohar@linux.ibm.com, roberto.sassu@huaweicloud.com, noodles@earth.li, jmorris@namei.org, serge@hallyn.com, dmitry.kasatkin@gmail.com, eric.snowberg@oracle.com, jgg@ziepe.ca Subject: Re: [PATCH v4 3/3] tpm: tpm_crb_ffa: revert defered_probed when tpm_crb_ffa is built-in Message-ID: References: <20260525075404.3480282-1-yeoreum.yun@arm.com> <20260525075404.3480282-4-yeoreum.yun@arm.com> <20260601-shiny-steel-jellyfish-b38b6e@sudeepholla> Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260601-shiny-steel-jellyfish-b38b6e@sudeepholla> On Mon, Jun 01, 2026 at 09:54:08AM +0100, Sudeep Holla wrote: > On Mon, Jun 01, 2026 at 08:17:13AM +0100, Yeoreum Yun wrote: > > Hi Jarkko, > > > > Sorry for late answer. > > > > > On Mon, May 25, 2026 at 08:54:04AM +0100, Yeoreum Yun wrote: > > > > commit 746d9e9f62a6 ("tpm: tpm_crb_ffa: try to probe tpm_crb_ffa when it's build_in") > > > > probe tpm_crb_ffa forcefully when it's built-in to integrate with IMA. > > > > > > > > However, IMA now provides the IMA_INIT_LATE_SYNC build option, which > > > > initialises IMA at the late_initcall_sync level, so this change is no > > > > longer required. > > > > > > > > Signed-off-by: Yeoreum Yun > > > > --- > > > > drivers/char/tpm/tpm_crb_ffa.c | 18 +++--------------- > > > > 1 file changed, 3 insertions(+), 15 deletions(-) > > > > > > > > diff --git a/drivers/char/tpm/tpm_crb_ffa.c b/drivers/char/tpm/tpm_crb_ffa.c > > > > index 99f1c1e5644b..025c4d4b17ca 100644 > > > > --- a/drivers/char/tpm/tpm_crb_ffa.c > > > > +++ b/drivers/char/tpm/tpm_crb_ffa.c > > > > @@ -177,23 +177,13 @@ static int tpm_crb_ffa_to_linux_errno(int errno) > > > > */ > > > > int tpm_crb_ffa_init(void) > > > > { > > > > - int ret = 0; > > > > - > > > > - if (!IS_MODULE(CONFIG_TCG_ARM_CRB_FFA)) { > > > > - ret = ffa_register(&tpm_crb_ffa_driver); > > > > - if (ret) { > > > > - tpm_crb_ffa = ERR_PTR(-ENODEV); > > > > - return ret; > > > > - } > > > > - } > > > > - > > > > if (!tpm_crb_ffa) > > > > - ret = -ENOENT; > > > > + return -ENOENT; > > > > > > > > if (IS_ERR_VALUE(tpm_crb_ffa)) > > > > - ret = -ENODEV; > > > > + return -ENODEV; > > > > > > > > - return ret; > > > > + return 0; > > > > } > > > > EXPORT_SYMBOL_GPL(tpm_crb_ffa_init); > > > > > > > > @@ -405,9 +395,7 @@ static struct ffa_driver tpm_crb_ffa_driver = { > > > > .id_table = tpm_crb_ffa_device_id, > > > > }; > > > > > > > > -#ifdef MODULE > > > > module_ffa_driver(tpm_crb_ffa_driver); > > > > -#endif > > > > > > > > MODULE_AUTHOR("Arm"); > > > > MODULE_DESCRIPTION("TPM CRB FFA driver"); > > > > -- > > > > LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7} > > > > > > > > > > How we would sync up this patch? Through which tree etc. > > > > IMHO, the IMA relevant thing would be into IMA tree, > > However I think this patch would be much easier to sync into Sudeep's > > FF-A tree where ff-a initilisation is reverted to device_initcall > > unless you're uncomfortable. > > > > For this, It might be better to split this patch from this series > > since by above and defer probe of ff-a would make a register failure > > of registering tpm_crb_ffa driver which is built-in. > > > > @Sudeep what do you think? > > > > IIRC, there is/was no dependency between these and FF-A patches that are > queued in terms of build. I agree there may be dependency to get all the > functionality but we can resort to linux-next for that. FF-A is not enabled > in the defconfig, so anyone working on FF-A + TPM must enable then and can > rely on -next IMHO. > > That said, I have already sent PR for FF-A to SoC team and it is already > queued for v7.2. I don't have any other plans unless they are fixes. Works for me. > > -- > Regards, > Sudeep BR, Jarkko