linux-kernel - [RFC PATCH 4/4] tpm: sysfs: Show locality used by kernel

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Message-ID: <20241102152226.2593598-5-jarkko@kernel.org>
Date: Sat,  2 Nov 2024 17:22:21 +0200
From: Jarkko Sakkinen <jarkko@...nel.org>
To: Peter Huewe <peterhuewe@....de>,
	Jarkko Sakkinen <jarkko@...nel.org>,
	Jason Gunthorpe <jgg@...pe.ca>
Cc: x86@...nel.org,
	"Daniel P. Smith" <dpsmith@...rtussolutions.com>,
	Ross Philipson <ross.philipson@...cle.com>,
	Ard Biesheuvel <ardb@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-integrity@...r.kernel.org (open list:TPM DEVICE DRIVER),
	linux-kernel@...r.kernel.org (open list)
Subject: [RFC PATCH 4/4] tpm: sysfs: Show locality used by kernel

From: Ross Philipson <ross.philipson@...cle.com>

Expose the locality used by kernel to sysfs.

Signed-off-by: Ross Philipson <ross.philipson@...cle.com>
Signed-off-by: Jarkko Sakkinen <jarkko@...nel.org>
---
 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..2da5857e223b 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, "%u\n", chip->kernel_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
 };
 
-- 
2.47.0