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Mon, 15 Dec 2025 23:41:04 +0000 (GMT) Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 5BFMuunX022539; Mon, 15 Dec 2025 23:41:03 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 4b0xkjkcev-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 15 Dec 2025 23:41:03 +0000 Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 5BFNf2D4011005; Mon, 15 Dec 2025 23:41:02 GMT Received: from bur-virt-x6-2-100.us.oracle.com (bur-virt-x6-2-100.us.oracle.com [10.153.92.40]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 4b0xkjkce5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 15 Dec 2025 23:41:02 +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 v15 18/28] x86: Add early SHA-256 support for Secure Launch early measurements Date: Mon, 15 Dec 2025 15:33:06 -0800 Message-ID: <20251215233316.1076248-19-ross.philipson@oracle.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20251215233316.1076248-1-ross.philipson@oracle.com> References: <20251215233316.1076248-1-ross.philipson@oracle.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-15_05,2025-12-15_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 suspectscore=0 adultscore=0 mlxscore=0 malwarescore=0 mlxlogscore=999 phishscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2510240000 definitions=main-2512150204 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjE1MDIwNCBTYWx0ZWRfXwQonRUQ6g85E opSINGdG70XSHXdq8qk8TtGSRM7xh9JRf2uNKHs7qrgUNjC/wLqGIupxRiO/Kb/Im6LX5BZ2b8J 4ZCOBJGMIRaBVIFj2SCyc5s8siTKOi7qLgy2+wSW8Gh5eqZVWe7TskAv3rmPB9xpClwoXcK6eS4 9DpkbDouG75fnqxQ4gnilUs+OgSPG61bto2LDtgwHjnaSNrn+xd7W6SN6ilu/eEnihO4Q7Zj7Oe V4v6JGiAlDzX2rAi3kNzAuHHnWmyzNiAW8xYZYQ6+uMbFZBJEuvGOzXg2T0tFqAUw/H5kD+EKC9 pfjySnoTEtm6UosMb1t2lJQJqFRL6r0CReZ7ZFFMGFKGr4nOvgJC2I0Gv6RYSuV9c20MBv/mcrQ xIAwF5lZp336jQMyxK7Cek2PfZJcawsFHntKO2Kvjk9JYjoI13A= X-Proofpoint-GUID: 48lxa0XfujKRu7g25Cxaq_7v_0Q2em1O X-Proofpoint-ORIG-GUID: 48lxa0XfujKRu7g25Cxaq_7v_0Q2em1O X-Authority-Analysis: v=2.4 cv=BYDVE7t2 c=1 sm=1 tr=0 ts=69409c91 b=1 cx=c_pps a=e1sVV491RgrpLwSTMOnk8w==:117 a=e1sVV491RgrpLwSTMOnk8w==:17 a=wP3pNCr1ah4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=UN5060LkAAAA:8 a=yPCof4ZbAAAA:8 a=E3ObfN1v1ytJGMqOQf8A:9 a=E6eXv-vVeS7VqOnxGRGn:22 cc=ntf awl=host:13654 Content-Type: text/plain; charset="utf-8" From: "Daniel P. Smith" The SHA-256 algorithm is necessary to measure configuration information into the TPM as early as possible before using the values. This implementation uses the established approach of #including the SHA-256 libraries directly = in the code since the compressed kernel is not uncompressed at this point. Signed-off-by: Daniel P. Smith Signed-off-by: Ross Philipson --- arch/x86/boot/compressed/Makefile | 1 + arch/x86/boot/compressed/sha256.c | 6 ++++++ 2 files changed, 7 insertions(+) create mode 100644 arch/x86/boot/compressed/sha256.c diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/M= akefile index 69592146ced7..0ea8a11ec271 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -113,6 +113,7 @@ $(obj)/sbat.o: $(CONFIG_EFI_SBAT_FILE) endif =20 slaunch-objs +=3D $(obj)/sha1.o +slaunch-objs +=3D $(obj)/sha256.o =20 vmlinux-objs-$(CONFIG_SECURE_LAUNCH) +=3D $(slaunch-objs) =20 diff --git a/arch/x86/boot/compressed/sha256.c b/arch/x86/boot/compressed/s= ha256.c new file mode 100644 index 000000000000..7795926e7e1d --- /dev/null +++ b/arch/x86/boot/compressed/sha256.c @@ -0,0 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2025 Apertus Solutions, LLC + */ + +#include "../../../../lib/crypto/sha256.c" --=20 2.43.7