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Mon, 21 Apr 2025 16:36:11 GMT Received: from pps.reinject (localhost [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 464298rhff-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 21 Apr 2025 16:36:11 +0000 Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 53LGaA6r000450; Mon, 21 Apr 2025 16:36:10 GMT Received: from bur-virt-x6-2-100.us.oracle.com (bur-virt-x6-2-100.us.oracle.com [10.153.92.40]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 464298rhce-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 21 Apr 2025 16:36:10 +0000 From: Ross Philipson 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, iommu@lists.linux.dev 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, corbet@lwn.net, ebiederm@xmission.com, dwmw2@infradead.org, baolu.lu@linux.intel.com, kanth.ghatraju@oracle.com, andrew.cooper3@citrix.com, trenchboot-devel@googlegroups.com Subject: [PATCH v14 16/19] tpm, tpm_tis: Allow locality to be set to a different value Date: Mon, 21 Apr 2025 09:27:09 -0700 Message-Id: <20250421162712.77452-17-ross.philipson@oracle.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250421162712.77452-1-ross.philipson@oracle.com> References: <20250421162712.77452-1-ross.philipson@oracle.com> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-21_08,2025-04-21_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 adultscore=0 phishscore=0 mlxscore=0 malwarescore=0 suspectscore=0 spamscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2502280000 definitions=main-2504210129 X-Proofpoint-ORIG-GUID: 1XaHbQ9RJQze08y9D58UmOEQh7HFZ-VL X-Proofpoint-GUID: 1XaHbQ9RJQze08y9D58UmOEQh7HFZ-VL DRTM needs to be able to set the locality used by kernel. Provide a one-shot function tpm_chip_set_locality() for the purpose. Signed-off-by: Ross Philipson Signed-off-by: Jarkko Sakkinen --- drivers/char/tpm/tpm-chip.c | 34 ++++++++++++++++++++++++++++++++- drivers/char/tpm/tpm_tis_core.c | 2 ++ include/linux/tpm.h | 4 ++++ 3 files changed, 39 insertions(+), 1 deletion(-) diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index e25daf2396d3..a603f0dadd43 100644 --- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -44,7 +44,7 @@ static int tpm_request_locality(struct tpm_chip *chip) if (!chip->ops->request_locality) return 0; - rc = chip->ops->request_locality(chip, 0); + rc = chip->ops->request_locality(chip, chip->kernel_locality); if (rc < 0) return rc; @@ -380,6 +380,7 @@ struct tpm_chip *tpm_chip_alloc(struct device *pdev, } chip->locality = -1; + chip->kernel_locality = 0; return chip; out: @@ -695,3 +696,34 @@ void tpm_chip_unregister(struct tpm_chip *chip) tpm_del_char_device(chip); } EXPORT_SYMBOL_GPL(tpm_chip_unregister); + +/** + * tpm_chip_set_locality() - Set the TPM locality kernel uses + * @chip: &tpm_chip instance + * @locality: new locality + * + * This a one-shot function. Returns zero or POSIX error on failure. + */ +int tpm_chip_set_locality(struct tpm_chip *chip, u8 locality) +{ + int ret; + + if (locality < 0 || locality >= TPM_MAX_LOCALITY) + return -EINVAL; + + ret = tpm_try_get_ops(chip); + if (ret) + return ret; + + if (!(chip->flags & TPM_CHIP_FLAG_SET_LOCALITY_ENABLED)) { + tpm_put_ops(chip); + return -EINVAL; + } + + chip->kernel_locality = locality; + chip->flags &= ~TPM_CHIP_FLAG_SET_LOCALITY_ENABLED; + tpm_put_ops(chip); + + return 0; +} +EXPORT_SYMBOL_GPL(tpm_chip_set_locality); diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index 222081e5c7f7..2bc0cf46adbf 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -1124,6 +1124,8 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq, if (IS_ERR(chip)) return PTR_ERR(chip); + chip->flags |= TPM_CHIP_FLAG_SET_LOCALITY_ENABLED; + #ifdef CONFIG_ACPI chip->acpi_dev_handle = acpi_dev_handle; #endif diff --git a/include/linux/tpm.h b/include/linux/tpm.h index 86fe8f6a2d52..884791acba2e 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -207,6 +207,8 @@ struct tpm_chip { /* active locality */ int locality; + /* the locality used by kernel */ + u8 kernel_locality; #ifdef CONFIG_TCG_TPM2_HMAC /* details for communication security via sessions */ @@ -355,6 +357,7 @@ enum tpm_chip_flags { TPM_CHIP_FLAG_SUSPENDED = BIT(8), TPM_CHIP_FLAG_HWRNG_DISABLED = BIT(9), TPM_CHIP_FLAG_DISABLE = BIT(10), + TPM_CHIP_FLAG_SET_LOCALITY_ENABLED = BIT(11), }; #define to_tpm_chip(d) container_of(d, struct tpm_chip, dev) @@ -448,6 +451,7 @@ static inline u32 tpm2_rc_value(u32 rc) extern int tpm_is_tpm2(struct tpm_chip *chip); extern __must_check int tpm_try_get_ops(struct tpm_chip *chip); extern void tpm_put_ops(struct tpm_chip *chip); +int tpm_chip_set_locality(struct tpm_chip *chip, u8 locality); extern ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf, size_t min_rsp_body_length, const char *desc); extern int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx,