From patchwork Fri Mar 28 23:08:11 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ross Philipson X-Patchwork-Id: 14032513 X-Patchwork-Delegate: herbert@gondor.apana.org.au Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) (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 64DA01F4CB5; Fri, 28 Mar 2025 23:14:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.165.32 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743203671; cv=none; b=IFw8zLv5cjWO2b5cTe9taNlUYh4Se5rEElASuNnE+Ixq25VfGfa+ry2E+1Wyvbfi40PXBMPgAjDILaJEWFeHM/PGqjifw/zFBaYt6+YfHJoUFDjjci8saw5mNvbVc+G4cPLpdmm5ZP7xOp6o+7X650QM4IR8Hh76qc5xvMYAcpA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743203671; c=relaxed/simple; bh=SmlfD27EUgKQRsv+ZWDcTsBJy6ZIT2Blo+ngGLAPCYk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Blbr5oS92BNOYFxJJiUVg8OpUMmlgmHm149Y/7nBaJu3qg17JWbnroi/McQFJc8/X/DKQ58FadC28KzlY95/q8bdTUs1xaH7fZaAtEm0CGz0TRorxbQxs4I6s3ksRIy7zPv/PC2+Y79kxKX/5JMiTYKYAvobuvriyOA8JvUKXgU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com; spf=pass smtp.mailfrom=oracle.com; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b=Dl3n1L69; arc=none smtp.client-ip=205.220.165.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oracle.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="Dl3n1L69" Received: from pps.filterd (m0246629.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 52SKWD5c015054; Fri, 28 Mar 2025 23:14:03 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=corp-2023-11-20; bh=DKm6I 3KDUfjRp2yGyQNITPNvyJw57L666olVWnEKwPI=; b=Dl3n1L69Ap1BOClj0scRS KieC1mQ30OYEIXpUOFteL9FU0osHScTWUd+vEa3FkZuxyAVOC4m2O3vMk43IofOd cso0uglYQZDAUKbypgq5QazJFQnMb3N7o07id4se7/vHS09Xl8h6+0SmIfsYFGab 2/iQ3YgXUoD4sZY2Smrb6aA4Lrs+1RRVzlW10+RVgz1jCJMQwsIiRKqNg+tGf7YU f3w7HiB4DgCXXxKZ49fL3gGcQsz4xM4cVtXhQapml26DuOM7oVIxCXEySNYrMuI0 bY4sCpm+UnUsG0v9wxZQrsTCNIvrkNAjxeynfhYJ9yFDo1n2vB/MxB/eC17qExXy Q== Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.appoci.oracle.com [130.35.103.27]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 45hn877n7k-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 28 Mar 2025 23:14:02 +0000 (GMT) Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 52SM427G028766; Fri, 28 Mar 2025 23:14:00 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 45jj6xd5y9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 28 Mar 2025 23:14:00 +0000 Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 52SNDxsV033337; Fri, 28 Mar 2025 23:13:59 GMT Received: from bur-virt-x6-2-100.us.oracle.com (bur-virt-x6-2-100.us.oracle.com [10.153.92.40]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 45jj6xd5y3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 28 Mar 2025 23:13:59 +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 v13 16/19] tpm, tpm_tis: Allow locality to be set to a different value Date: Fri, 28 Mar 2025 16:08:11 -0700 Message-Id: <20250328230814.2210230-17-ross.philipson@oracle.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250328230814.2210230-1-ross.philipson@oracle.com> References: <20250328230814.2210230-1-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=2025-03-28_11,2025-03-27_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 bulkscore=0 suspectscore=0 adultscore=0 malwarescore=0 spamscore=0 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2502280000 definitions=main-2503280156 X-Proofpoint-GUID: ZserYLSCXyjN-7ktqF0zKu-OMu5o8GAK X-Proofpoint-ORIG-GUID: ZserYLSCXyjN-7ktqF0zKu-OMu5o8GAK 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 | 33 ++++++++++++++++++++++++++++++++- drivers/char/tpm/tpm_tis_core.c | 2 ++ include/linux/tpm.h | 4 ++++ 3 files changed, 38 insertions(+), 1 deletion(-) diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index 7df7abaf3e52..ac200514c4d7 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; @@ -374,6 +374,7 @@ struct tpm_chip *tpm_chip_alloc(struct device *pdev, } chip->locality = -1; + chip->kernel_locality = 0; return chip; out: @@ -689,3 +690,33 @@ 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 f9a3489313b4..fd17cccb8abf 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -1117,6 +1117,8 @@ 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 c5a4a2d7dd15..9f910d3bc2e4 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 */ @@ -354,6 +356,7 @@ 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) @@ -447,6 +450,7 @@ 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,