linux-kernel - [PATCH v12 17/19] tpm, sysfs: Show locality used by kernel

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Message-Id: <20241219194216.152839-18-ross.philipson@oracle.com>
Date: Thu, 19 Dec 2024 11:42:14 -0800
From: Ross Philipson <ross.philipson@...cle.com>
To: linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-integrity@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-crypto@...r.kernel.org, kexec@...ts.infradead.org,
        linux-efi@...r.kernel.org, iommu@...ts.linux-foundation.org
Cc: ross.philipson@...cle.com, dpsmith@...rtussolutions.com,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        dave.hansen@...ux.intel.com, ardb@...nel.org, mjg59@...f.ucam.org,
        James.Bottomley@...senpartnership.com, peterhuewe@....de,
        jarkko@...nel.org, jgg@...pe.ca, luto@...capital.net,
        nivedita@...m.mit.edu, herbert@...dor.apana.org.au,
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        dwmw2@...radead.org, baolu.lu@...ux.intel.com,
        kanth.ghatraju@...cle.com, andrew.cooper3@...rix.com,
        trenchboot-devel@...glegroups.com
Subject: [PATCH v12 17/19] tpm, sysfs: Show locality used by kernel

Expose the locality used by the 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
 };
 
-- 
2.39.3