From patchwork Mon Aug 26 22:38:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ross Philipson X-Patchwork-Id: 822515 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 D83EC19DF68; Mon, 26 Aug 2024 22:42:42 +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=1724712164; cv=none; b=RUK4vM3rLXrJtK2TUezrnGII9JZFDZUZ2m4FoBOSp+xvs+/6Zd1qeYqKqA6SuouOhoSUuL9F343IFHMUs3ep0yNevhRJXJfzDKwuosFfkvanoAyW6bewwR/lSdHxxX9Aojtgu+7gxXaKpY8+rGcGEuxPjPSiVu7n4ZHMZI9uBJE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724712164; c=relaxed/simple; bh=IX41m2RyjzeLHtFK0M13DVWuqzLHt8d0karynGE97vw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=bakh4eul5xxss9nXat8iS17sV7iWOLW4nD/rEMTcrASSjd7zhFzRQN3ze9nWEtp2t4wBZhd6Y92jbsM1PQDJDp2LVnIhqiTqo0oECm/IVkWRrtxRhpmATl6FPkBYxSG/6C950RCR0xJZEx8hD0ZKduYakQzhGDVxhSCJVACom+M= 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=U+gfO979; 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="U+gfO979" Received: from pps.filterd (m0246627.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 47QKtTWW020332; Mon, 26 Aug 2024 22:42:13 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=corp-2023-11-20; bh=A iYppGeaEZDNGbGOr9HR2+PTJeFPN2F9YYIaCA7+Zmg=; b=U+gfO979jrYJCTffZ trOLvSQlcV1FsdKSMYFBcd5bbLqnEEnrvRxD+TXJJz05rCORyrAo8uf9JgPi3S/a 3k4FNO5bmaUB5VSJxqT1IVtzgfGGqje3ftandV99Oq/MgKugeKQjTUjHWSlG6yVf tWtJ9BJit6rR3DlNArXPIK7thEFeEs6J2AZAW2tSSKmwQDiraD7HJK2PjutO/vKh XnPncN4siYgPX2TAag4AZ19KwHOdm1YSjeTwOQ0sgSIY8xev4QQB6papSA4QR05q iyBlu9CNzhPsLyt4xYq8c5KlAgnzephYkoe06jVMAaJEADuvXG6e9bv1/RdIhmkg uqNMg== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4177hwm9en-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 26 Aug 2024 22:42:13 +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 47QLESu7020318; Mon, 26 Aug 2024 22:42:11 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 418j8kw9r8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 26 Aug 2024 22:42:11 +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 47QMgAbw012802; Mon, 26 Aug 2024 22:42:10 GMT Received: from localhost.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 418j8kw9qb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 26 Aug 2024 22:42:10 +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-foundation.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, 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 v10 08/20] x86/boot: Place TXT MLE header in the kernel_info section Date: Mon, 26 Aug 2024 15:38:23 -0700 Message-Id: <20240826223835.3928819-9-ross.philipson@oracle.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20240826223835.3928819-1-ross.philipson@oracle.com> References: <20240826223835.3928819-1-ross.philipson@oracle.com> Precedence: bulk X-Mailing-List: linux-efi@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:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-08-26_16,2024-08-26_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 mlxlogscore=999 adultscore=0 mlxscore=0 spamscore=0 malwarescore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2407110000 definitions=main-2408260174 X-Proofpoint-GUID: 9VWveQvujOAy5yzMbfvIdbeqEWrlrR6i X-Proofpoint-ORIG-GUID: 9VWveQvujOAy5yzMbfvIdbeqEWrlrR6i The MLE (measured launch environment) header must be locatable by the boot loader and TXT must be setup to do a launch with this header's location. While the offset to the kernel_info structure does not need to be at a fixed offset, the offsets in the header must be relative offsets from the start of the setup kernel. The support in the linker file achieves this. Signed-off-by: Ross Philipson Suggested-by: Ard Biesheuvel Reviewed-by: Ard Biesheuvel --- arch/x86/boot/compressed/kernel_info.S | 50 +++++++++++++++++++++++--- arch/x86/boot/compressed/vmlinux.lds.S | 7 ++++ 2 files changed, 53 insertions(+), 4 deletions(-) diff --git a/arch/x86/boot/compressed/kernel_info.S b/arch/x86/boot/compressed/kernel_info.S index f818ee8fba38..a0604a0d1756 100644 --- a/arch/x86/boot/compressed/kernel_info.S +++ b/arch/x86/boot/compressed/kernel_info.S @@ -1,12 +1,20 @@ /* SPDX-License-Identifier: GPL-2.0 */ +#include #include - .section ".rodata.kernel_info", "a" +/* + * The kernel_info structure is not placed at a fixed offest in the + * kernel image. So this macro and the support in the linker file + * allow the relative offsets for the MLE header within the kernel + * image to be configured at build time. + */ +#define roffset(X) ((X) - kernel_info) - .global kernel_info + .section ".rodata.kernel_info", "a" -kernel_info: + .balign 16 +SYM_DATA_START(kernel_info) /* Header, Linux top (structure). */ .ascii "LToP" /* Size. */ @@ -17,6 +25,40 @@ kernel_info: /* Maximal allowed type for setup_data and setup_indirect structs. */ .long SETUP_TYPE_MAX + /* Offset to the MLE header structure */ +#if IS_ENABLED(CONFIG_SECURE_LAUNCH) + .long roffset(mle_header_offset) +#else + .long 0 +#endif + kernel_info_var_len_data: /* Empty for time being... */ -kernel_info_end: +SYM_DATA_END_LABEL(kernel_info, SYM_L_LOCAL, kernel_info_end) + +#if IS_ENABLED(CONFIG_SECURE_LAUNCH) + /* + * The MLE Header per the TXT Specification, section 2.1 + * MLE capabilities, see table 4. Capabilities set: + * bit 0: Support for GETSEC[WAKEUP] for RLP wakeup + * bit 1: Support for RLP wakeup using MONITOR address + * bit 2: The ECX register will contain the pointer to the MLE page table + * bit 5: TPM 1.2 family: Details/authorities PCR usage support + * bit 9: Supported format of TPM 2.0 event log - TCG compliant + */ +SYM_DATA_START(mle_header) + .long 0x9082ac5a /* UUID0 */ + .long 0x74a7476f /* UUID1 */ + .long 0xa2555c0f /* UUID2 */ + .long 0x42b651cb /* UUID3 */ + .long 0x00000034 /* MLE header size */ + .long 0x00020002 /* MLE version 2.2 */ + .long roffset(sl_stub_entry_offset) /* Linear entry point of MLE (virt. address) */ + .long 0x00000000 /* First valid page of MLE */ + .long 0x00000000 /* Offset within binary of first byte of MLE */ + .long roffset(_edata_offset) /* Offset within binary of last byte + 1 of MLE */ + .long 0x00000227 /* Bit vector of MLE-supported capabilities */ + .long 0x00000000 /* Starting linear address of command line (unused) */ + .long 0x00000000 /* Ending linear address of command line (unused) */ +SYM_DATA_END(mle_header) +#endif diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S index 083ec6d7722a..f82184801462 100644 --- a/arch/x86/boot/compressed/vmlinux.lds.S +++ b/arch/x86/boot/compressed/vmlinux.lds.S @@ -118,3 +118,10 @@ SECTIONS } ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!") } + +#ifdef CONFIG_SECURE_LAUNCH +PROVIDE(kernel_info_offset = ABSOLUTE(kernel_info - startup_32)); +PROVIDE(mle_header_offset = kernel_info_offset + ABSOLUTE(mle_header - startup_32)); +PROVIDE(sl_stub_entry_offset = kernel_info_offset + ABSOLUTE(sl_stub_entry - startup_32)); +PROVIDE(_edata_offset = kernel_info_offset + ABSOLUTE(_edata - startup_32)); +#endif