From: Ross Philipson <ross.philipson@oracle.com> To: linux-kernel@vger.kernel.org, x86@kernel.org, linux-integrity@vger.kernel.org, linux-doc@vger.kernel.org, linux-crypto@vger.kernel.org, kexec@lists.infradead.org, linux-efi@vger.kernel.org Cc: ross.philipson@oracle.com, dpsmith@apertussolutions.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, dave.hansen@linux.intel.com, ardb@kernel.org, mjg59@srcf.ucam.org, James.Bottomley@hansenpartnership.com, peterhuewe@gmx.de, jarkko@kernel.org, jgg@ziepe.ca, luto@amacapital.net, nivedita@alum.mit.edu, herbert@gondor.apana.org.au, davem@davemloft.net, kanth.ghatraju@oracle.com, trenchboot-devel@googlegroups.com Subject: [PATCH v8 13/15] tpm: Add sysfs interface to allow setting and querying the preferred locality Date: Wed, 14 Feb 2024 14:18:45 -0800 [thread overview] Message-ID: <20240214221847.2066632-14-ross.philipson@oracle.com> (raw) In-Reply-To: <20240214221847.2066632-1-ross.philipson@oracle.com> Expose a sysfs interface to allow user mode to set and query the preferred locality for the TPM chip. Signed-off-by: Ross Philipson <ross.philipson@oracle.com> --- drivers/char/tpm/tpm-sysfs.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c index 54c71473aa29..c43630d0996e 100644 --- a/drivers/char/tpm/tpm-sysfs.c +++ b/drivers/char/tpm/tpm-sysfs.c @@ -309,6 +309,34 @@ static ssize_t tpm_version_major_show(struct device *dev, } static DEVICE_ATTR_RO(tpm_version_major); +static ssize_t preferred_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->pref_locality); +} + +static ssize_t preferred_locality_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct tpm_chip *chip = to_tpm_chip(dev); + unsigned int locality; + + if (kstrtouint(buf, 0, &locality)) + return -ERANGE; + + if (locality >= TPM_MAX_LOCALITY) + return -ERANGE; + + if (tpm_chip_preferred_locality(chip, (int)locality)) + return count; + else + return 0; +} + +static DEVICE_ATTR_RW(preferred_locality); + static struct attribute *tpm1_dev_attrs[] = { &dev_attr_pubek.attr, &dev_attr_pcrs.attr, @@ -321,11 +349,13 @@ static struct attribute *tpm1_dev_attrs[] = { &dev_attr_durations.attr, &dev_attr_timeouts.attr, &dev_attr_tpm_version_major.attr, + &dev_attr_preferred_locality.attr, NULL, }; static struct attribute *tpm2_dev_attrs[] = { &dev_attr_tpm_version_major.attr, + &dev_attr_preferred_locality.attr, NULL }; -- 2.39.3 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
WARNING: multiple messages have this Message-ID (diff)
From: Ross Philipson <ross.philipson@oracle.com> To: linux-kernel@vger.kernel.org, x86@kernel.org, linux-integrity@vger.kernel.org, linux-doc@vger.kernel.org, linux-crypto@vger.kernel.org, kexec@lists.infradead.org, linux-efi@vger.kernel.org Cc: ross.philipson@oracle.com, dpsmith@apertussolutions.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, dave.hansen@linux.intel.com, ardb@kernel.org, mjg59@srcf.ucam.org, James.Bottomley@hansenpartnership.com, peterhuewe@gmx.de, jarkko@kernel.org, jgg@ziepe.ca, luto@amacapital.net, nivedita@alum.mit.edu, herbert@gondor.apana.org.au, davem@davemloft.net, kanth.ghatraju@oracle.com, trenchboot-devel@googlegroups.com Subject: [PATCH v8 13/15] tpm: Add sysfs interface to allow setting and querying the preferred locality Date: Wed, 14 Feb 2024 14:18:45 -0800 [thread overview] Message-ID: <20240214221847.2066632-14-ross.philipson@oracle.com> (raw) In-Reply-To: <20240214221847.2066632-1-ross.philipson@oracle.com> Expose a sysfs interface to allow user mode to set and query the preferred locality for the TPM chip. Signed-off-by: Ross Philipson <ross.philipson@oracle.com> --- drivers/char/tpm/tpm-sysfs.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c index 54c71473aa29..c43630d0996e 100644 --- a/drivers/char/tpm/tpm-sysfs.c +++ b/drivers/char/tpm/tpm-sysfs.c @@ -309,6 +309,34 @@ static ssize_t tpm_version_major_show(struct device *dev, } static DEVICE_ATTR_RO(tpm_version_major); +static ssize_t preferred_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->pref_locality); +} + +static ssize_t preferred_locality_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct tpm_chip *chip = to_tpm_chip(dev); + unsigned int locality; + + if (kstrtouint(buf, 0, &locality)) + return -ERANGE; + + if (locality >= TPM_MAX_LOCALITY) + return -ERANGE; + + if (tpm_chip_preferred_locality(chip, (int)locality)) + return count; + else + return 0; +} + +static DEVICE_ATTR_RW(preferred_locality); + static struct attribute *tpm1_dev_attrs[] = { &dev_attr_pubek.attr, &dev_attr_pcrs.attr, @@ -321,11 +349,13 @@ static struct attribute *tpm1_dev_attrs[] = { &dev_attr_durations.attr, &dev_attr_timeouts.attr, &dev_attr_tpm_version_major.attr, + &dev_attr_preferred_locality.attr, NULL, }; static struct attribute *tpm2_dev_attrs[] = { &dev_attr_tpm_version_major.attr, + &dev_attr_preferred_locality.attr, NULL }; -- 2.39.3
next prev parent reply other threads:[~2024-02-14 22:36 UTC|newest] Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-02-14 22:18 [PATCH v8 00/15] x86: Trenchboot secure dynamic launch Linux kernel support Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-14 22:18 ` [PATCH v8 01/15] x86/boot: Place kernel_info at a fixed offset Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-15 7:56 ` Ard Biesheuvel 2024-02-15 7:56 ` Ard Biesheuvel 2024-02-15 10:56 ` Daniel Kiper 2024-02-15 10:56 ` Daniel Kiper 2024-03-21 13:45 ` Daniel P. Smith 2024-03-21 13:45 ` Daniel P. Smith 2024-03-22 14:18 ` H. Peter Anvin 2024-03-22 14:18 ` H. Peter Anvin 2024-03-23 1:33 ` Daniel P. Smith 2024-03-23 1:33 ` Daniel P. Smith 2024-02-14 22:18 ` [PATCH v8 02/15] Documentation/x86: Secure Launch kernel documentation Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-14 22:18 ` [PATCH v8 03/15] x86: Secure Launch Kconfig Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-15 7:59 ` Ard Biesheuvel 2024-02-15 7:59 ` Ard Biesheuvel 2024-02-15 22:20 ` ross.philipson 2024-02-15 22:20 ` ross.philipson 2024-02-14 22:18 ` [PATCH v8 04/15] x86: Secure Launch Resource Table header file Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-15 8:08 ` Ard Biesheuvel 2024-02-15 8:08 ` Ard Biesheuvel 2024-02-22 2:03 ` Andrew Cooper 2024-02-22 2:03 ` Andrew Cooper 2024-02-22 2:10 ` ross.philipson 2024-02-22 2:10 ` ross.philipson 2024-02-22 17:49 ` ross.philipson 2024-02-22 17:49 ` ross.philipson 2024-03-29 22:38 ` Kim Phillips 2024-03-29 22:38 ` Kim Phillips 2024-03-29 22:38 ` Kim Phillips 2024-03-29 22:38 ` Kim Phillips 2024-03-29 22:38 ` Kim Phillips 2024-03-29 22:38 ` Kim Phillips 2024-04-01 18:25 ` ross.philipson 2024-04-01 18:25 ` ross.philipson 2024-02-14 22:18 ` [PATCH v8 05/15] x86: Secure Launch main " Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-14 22:18 ` [PATCH v8 06/15] x86: Add early SHA support for Secure Launch early measurements Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-15 8:17 ` Ard Biesheuvel 2024-02-15 8:17 ` Ard Biesheuvel 2024-02-22 3:04 ` Andrew Cooper 2024-02-22 3:04 ` Andrew Cooper 2024-02-22 9:34 ` Ard Biesheuvel 2024-02-22 9:34 ` Ard Biesheuvel 2024-02-22 12:30 ` Andrew Cooper 2024-02-22 12:30 ` Andrew Cooper 2024-02-23 9:27 ` Ard Biesheuvel 2024-02-23 9:27 ` Ard Biesheuvel 2024-02-23 16:42 ` Andrew Cooper 2024-02-23 16:42 ` Andrew Cooper 2024-02-23 17:54 ` Eric Biggers 2024-02-23 17:54 ` Eric Biggers 2024-02-23 18:20 ` Andrew Cooper 2024-02-23 18:20 ` Andrew Cooper 2024-02-23 18:30 ` Eric Biggers 2024-02-23 18:30 ` Eric Biggers 2024-04-03 16:32 ` Andy Lutomirski 2024-04-03 16:32 ` Andy Lutomirski 2024-04-03 23:56 ` Eric Biggers 2024-04-03 23:56 ` Eric Biggers 2024-04-04 4:55 ` ross.philipson 2024-04-04 4:55 ` ross.philipson 2024-04-04 14:55 ` Jarkko Sakkinen 2024-04-04 14:55 ` Jarkko Sakkinen 2024-02-14 22:18 ` [PATCH v8 07/15] x86: Secure Launch kernel early boot stub Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-15 8:29 ` Ard Biesheuvel 2024-02-15 8:29 ` Ard Biesheuvel 2024-02-15 22:26 ` ross.philipson 2024-02-15 22:26 ` ross.philipson 2024-02-14 22:18 ` [PATCH v8 08/15] x86: Secure Launch kernel late " Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-14 22:18 ` [PATCH v8 09/15] x86: Secure Launch SMP bringup support Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-14 22:18 ` [PATCH v8 10/15] kexec: Secure Launch kexec SEXIT support Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-14 22:18 ` [PATCH v8 11/15] reboot: Secure Launch SEXIT support on reboot paths Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-14 22:18 ` [PATCH v8 12/15] tpm: Add ability to set the preferred locality the TPM chip uses Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-14 22:18 ` Ross Philipson [this message] 2024-02-14 22:18 ` [PATCH v8 13/15] tpm: Add sysfs interface to allow setting and querying the preferred locality Ross Philipson 2024-02-14 22:18 ` [PATCH v8 14/15] x86: Secure Launch late initcall platform module Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-15 8:40 ` Ard Biesheuvel 2024-02-15 8:40 ` Ard Biesheuvel 2024-02-22 13:57 ` Daniel P. Smith 2024-02-22 13:57 ` Daniel P. Smith 2024-02-23 9:36 ` Ard Biesheuvel 2024-02-23 9:36 ` Ard Biesheuvel 2024-03-21 14:11 ` Daniel P. Smith 2024-03-21 14:11 ` Daniel P. Smith 2024-02-16 1:53 ` kernel test robot 2024-02-16 1:53 ` kernel test robot 2024-02-17 7:53 ` kernel test robot 2024-02-17 7:53 ` kernel test robot 2024-02-14 22:18 ` [PATCH v8 15/15] x86: EFI stub DRTM launch support for Secure Launch Ross Philipson 2024-02-14 22:18 ` Ross Philipson 2024-02-15 9:01 ` Ard Biesheuvel 2024-02-15 9:01 ` Ard Biesheuvel 2024-02-21 20:17 ` ross.philipson 2024-02-21 20:17 ` ross.philipson 2024-02-21 20:37 ` H. Peter Anvin 2024-02-21 20:37 ` H. Peter Anvin 2024-02-21 23:24 ` Ard Biesheuvel 2024-02-21 23:24 ` Ard Biesheuvel 2024-02-17 7:31 ` kernel test robot 2024-02-17 7:31 ` kernel test robot 2024-02-17 20:06 ` kernel test robot 2024-02-17 20:06 ` kernel test robot
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