From patchwork Sat Nov 2 06:22:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 13860006 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 105119474; Sat, 2 Nov 2024 06:23:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730528599; cv=none; b=Mn+ItchDEpys2yDcG/cd68RZ7MNcc1IaABLxNNz7HEyIef+TS8zAGhExuNZsmGkV5sXas1WgRN5ikCYgUKSFrdlPBR8/jdFGz2D3niImQJbgZzkQbs//ZPpElFsdpIq0FLcC02FyBeoxQX5Gg5Nb9Qbk2adGbMxDoRQvOPhAH6I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730528599; c=relaxed/simple; bh=NY0xcRqGkYBk6+Iddjn1WeUvmoSjuS6NoFtXitHCID0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=poV9yNOGaJzepvXFzAEWZdMCUkpEuPh/qKFkZfdrNq119pJjPRUSjo/8/FpYlW18Q0SNATkxHqRcrisw5NXcl5mXV3VWbIGfBymCWg8VSoyt4Lrr0mOTsmKceySbWhaRcKJdv5Lyi5erI6LSEi49v+JWgABQxc9r1mAbzNixuGY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uV7o7pOr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="uV7o7pOr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E59A8C4CEC3; Sat, 2 Nov 2024 06:23:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730528598; bh=NY0xcRqGkYBk6+Iddjn1WeUvmoSjuS6NoFtXitHCID0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uV7o7pOrKf9LSTRyEOabwTBsOog6I7KPkza7UGoUxg1Xd+xU07PDpBzcVsPypJyq4 K+3gaFSR4nWjuiQwKoI0B16X7FxC3485i9dR1dnz1mkBfdVHQy3OMWlz1MbXRAwiZj uvPuMuR8X6okk1idTIHZ9wiNiGt5EAOL+tys3W4DNSymZotpPvt39IQ2xBVNTfNFmo HjHnP6H30hx4tt4BaHCrbgR+O6D0COycWSDU2rNfbHqUArAYgWHMz/CyTl+OGmnyIi xSBPF9Oc+soqtNrmQKbbC1Rz5VZpRHfoppBTRrIN7CeIx4YsFHgf81ZvaJgmtnKLTM Hvb3IVJ5+8OaA== From: Jarkko Sakkinen To: jarkko@kernel.org, Peter Huewe , Jason Gunthorpe Cc: James.Bottomley@hansenpartnership.com, andrew.cooper3@citrix.com, ardb@kernel.org, baolu.lu@linux.intel.com, bp@alien8.de, corbet@lwn.net, dave.hansen@linux.intel.com, davem@davemloft.net, dpsmith@apertussolutions.com, dwmw2@infradead.org, ebiederm@xmission.com, herbert@gondor.apana.org.au, hpa@zytor.com, iommu@lists.linux-foundation.org, kanth.ghatraju@oracle.com, kexec@lists.infradead.org, linux-crypto@vger.kernel.org, linux-doc@vger.kernel.org, linux-efi@vger.kernel.org, linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, luto@amacapital.net, mingo@redhat.com, mjg59@srcf.ucam.org, nivedita@alum.mit.edu, ross.philipson@oracle.com, tglx@linutronix.de, trenchboot-devel@googlegroups.com, x86@kernel.org Subject: [RFC PATCH v2 2/2] tpm: show the default locality in sysfs Date: Sat, 2 Nov 2024 08:22:57 +0200 Message-ID: <20241102062259.2521361-2-jarkko@kernel.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241102062259.2521361-1-jarkko@kernel.org> References: <20241102062259.2521361-1-jarkko@kernel.org> Precedence: bulk X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Ross Philipson Expose the default locality as read-only attribute through sysfs. Signed-off-by: Ross Philipson Signed-off-by: Jarkko Sakkinen --- v2: - A new patch. - Import from the original Trenchboot patch set. - Drop the store operation. - Tested with https://codeberg.org/jarkko/tpm-set-locality-test/src/branch/main/src/main.rs --- drivers/char/tpm/tpm-sysfs.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c index 94231f052ea7..4f5e60b1e4c9 100644 --- a/drivers/char/tpm/tpm-sysfs.c +++ b/drivers/char/tpm/tpm-sysfs.c @@ -309,6 +309,14 @@ static ssize_t tpm_version_major_show(struct device *dev, } static DEVICE_ATTR_RO(tpm_version_major); +static ssize_t locality_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct tpm_chip *chip = to_tpm_chip(dev); + + return sprintf(buf, "%d\n", chip->default_locality); +} +static DEVICE_ATTR_RO(locality); + #ifdef CONFIG_TCG_TPM2_HMAC static ssize_t null_name_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -336,6 +344,7 @@ static struct attribute *tpm1_dev_attrs[] = { &dev_attr_durations.attr, &dev_attr_timeouts.attr, &dev_attr_tpm_version_major.attr, + &dev_attr_locality.attr, NULL, }; @@ -344,6 +353,7 @@ static struct attribute *tpm2_dev_attrs[] = { #ifdef CONFIG_TCG_TPM2_HMAC &dev_attr_null_name.attr, #endif + &dev_attr_locality.attr, NULL };