From patchwork Thu Feb 24 16:56:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brijesh Singh X-Patchwork-Id: 12758999 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15734C43219 for ; Thu, 24 Feb 2022 17:00:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231555AbiBXRAb (ORCPT ); Thu, 24 Feb 2022 12:00:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52814 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230332AbiBXQ7n (ORCPT ); Thu, 24 Feb 2022 11:59:43 -0500 Received: from NAM04-MW2-obe.outbound.protection.outlook.com (mail-mw2nam08on2079.outbound.protection.outlook.com [40.107.101.79]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F33DF60DA1; Thu, 24 Feb 2022 08:58:42 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=bpyzQq/joOfVh6H/4GoDwGqhEPVrQ/CvyPfEBl3r5DViMVBLIcgHdApEd1umaYydefijhs3gmtJTV8xL0sDnO276i463qNBB+x0xYTbIjd/1cwD99ja9cNlEj/LaK857uLufM0DD79MOcM/qZVS4IxMLc79yonFVODedZdFs6LY25ue6IXKvw33fPaiR7SvqYvR7gCdnJ0EibZGsZXZOtKK8MaWuhFNoY4iQJrO7E9imrx/ohGwNQWS+HSdRnQwOqdEJ6ZfZeSZlIYxOJ+6MAkwpbaCPk52oeJ4rhDpN7CLMvo9SYJL/awQSXAZUNdRMEY6poKqp0vAwCJCOlRo+qw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=T29/2TaTjE6y2w/cbm8PhGEi49TMVSH6O9SJYjUyJsI=; b=Dcm/e4bmn0oSKbjIZ9zF/fSsmUf8gMz+Ri63HlVqH9W6Aa7N0k8Xf1e0fLpiEWLQ6P1f+DYcEimzjOLPTatYs3PaodEz9bMu6gqhCJZusdNC1B15dPFHqSnQ7hOn084IZyacYKgejFGEhTH/S51jcUM70xOH/7PM1+6OB0hxGU8AfbeCFO6VI1tLMJ3lEM5HJEwQjJ9anIYIyosvwBqQGaLOfGrSPgtRBLZh/nsjrXFOmS42V/wJBQIY3dkqUASxMZNmXAsff5LjG0hahXYbp8QYbl+3XGDlDCN+1Q71pzBomL+UNRewpzmMek0LkHOKtY1FNpfpxIy6ZtS3Z8hkYg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=kernel.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=T29/2TaTjE6y2w/cbm8PhGEi49TMVSH6O9SJYjUyJsI=; b=Dy5M41UspFeF7ExyBuY0ilRqblMZfhKKxY/zHTxBN7YJxz6gNZFHVNCPBoz7ZLFhNjhyeo/1rGVwySbFKuNmwPy1KEC510Tut5oaVUA3pnXtUJNkG2YB0/i6DBkErM31fW9i6utxXjIRfVyFODSP3qPr0YbXzMor3HQl/TPaV+U= Received: from DM6PR02CA0117.namprd02.prod.outlook.com (2603:10b6:5:1b4::19) by BN6PR12MB1699.namprd12.prod.outlook.com (2603:10b6:404:ff::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5017.24; Thu, 24 Feb 2022 16:58:39 +0000 Received: from DM6NAM11FT063.eop-nam11.prod.protection.outlook.com (2603:10b6:5:1b4:cafe::3d) by DM6PR02CA0117.outlook.office365.com (2603:10b6:5:1b4::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5017.22 via Frontend Transport; Thu, 24 Feb 2022 16:58:39 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; Received: from SATLEXMB04.amd.com (165.204.84.17) by DM6NAM11FT063.mail.protection.outlook.com (10.13.172.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5017.22 via Frontend Transport; Thu, 24 Feb 2022 16:58:39 +0000 Received: from sbrijesh-desktop.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.18; Thu, 24 Feb 2022 10:58:34 -0600 From: Brijesh Singh To: , , , , , , CC: Thomas Gleixner , Ingo Molnar , Joerg Roedel , Tom Lendacky , "H. Peter Anvin" , Ard Biesheuvel , Paolo Bonzini , Sean Christopherson , "Vitaly Kuznetsov" , Jim Mattson , "Andy Lutomirski" , Dave Hansen , Sergio Lopez , Peter Gonda , "Peter Zijlstra" , Srinivas Pandruvada , David Rientjes , Dov Murik , Tobin Feldman-Fitzthum , Borislav Petkov , Michael Roth , Vlastimil Babka , "Kirill A . Shutemov" , Andi Kleen , "Dr . David Alan Gilbert" , , , , , Brijesh Singh Subject: [PATCH v11 24/45] x86/compressed/acpi: Move EFI detection to helper Date: Thu, 24 Feb 2022 10:56:04 -0600 Message-ID: <20220224165625.2175020-25-brijesh.singh@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220224165625.2175020-1-brijesh.singh@amd.com> References: <20220224165625.2175020-1-brijesh.singh@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 0631fd1c-eb8f-431b-79d5-08d9f7b6e7cf X-MS-TrafficTypeDiagnostic: BN6PR12MB1699:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230001)(4636009)(46966006)(36840700001)(40470700004)(86362001)(47076005)(36860700001)(2906002)(7416002)(316002)(5660300002)(7406005)(83380400001)(36756003)(2616005)(426003)(336012)(7696005)(40460700003)(6666004)(16526019)(81166007)(8936002)(186003)(356005)(110136005)(26005)(82310400004)(54906003)(70586007)(1076003)(70206006)(508600001)(4326008)(8676002)(44832011)(2101003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Feb 2022 16:58:39.3628 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0631fd1c-eb8f-431b-79d5-08d9f7b6e7cf X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT063.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR12MB1699 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org From: Michael Roth Future patches for SEV-SNP-validated CPUID will also require early parsing of the EFI configuration. Incrementally move the related code into a set of helpers that can be re-used for that purpose. Signed-off-by: Michael Roth Signed-off-by: Brijesh Singh --- arch/x86/boot/compressed/Makefile | 1 + arch/x86/boot/compressed/acpi.c | 28 +++++++---------- arch/x86/boot/compressed/efi.c | 50 +++++++++++++++++++++++++++++++ arch/x86/boot/compressed/misc.h | 16 ++++++++++ 4 files changed, 77 insertions(+), 18 deletions(-) create mode 100644 arch/x86/boot/compressed/efi.c diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index 6115274fe10f..e69c3d2e0628 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -103,6 +103,7 @@ endif vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_thunk_$(BITS).o +vmlinux-objs-$(CONFIG_EFI) += $(obj)/efi.o efi-obj-$(CONFIG_EFI_STUB) = $(objtree)/drivers/firmware/efi/libstub/lib.a $(obj)/vmlinux: $(vmlinux-objs-y) $(efi-obj-y) FORCE diff --git a/arch/x86/boot/compressed/acpi.c b/arch/x86/boot/compressed/acpi.c index 8bcbcee54aa1..db6c561920f0 100644 --- a/arch/x86/boot/compressed/acpi.c +++ b/arch/x86/boot/compressed/acpi.c @@ -87,7 +87,7 @@ static acpi_physical_address kexec_get_rsdp_addr(void) efi_system_table_64_t *systab; struct efi_setup_data *esd; struct efi_info *ei; - char *sig; + enum efi_type et; esd = (struct efi_setup_data *)get_kexec_setup_data_addr(); if (!esd) @@ -98,10 +98,9 @@ static acpi_physical_address kexec_get_rsdp_addr(void) return 0; } - ei = &boot_params->efi_info; - sig = (char *)&ei->efi_loader_signature; - if (strncmp(sig, EFI64_LOADER_SIGNATURE, 4)) { - debug_putstr("Wrong kexec EFI loader signature.\n"); + et = efi_get_type(boot_params); + if (et != EFI_TYPE_64) { + debug_putstr("Unexpected kexec EFI environment (expected 64-bit EFI).\n"); return 0; } @@ -122,29 +121,22 @@ static acpi_physical_address efi_get_rsdp_addr(void) unsigned long systab, config_tables; unsigned int nr_tables; struct efi_info *ei; + enum efi_type et; bool efi_64; - char *sig; - - ei = &boot_params->efi_info; - sig = (char *)&ei->efi_loader_signature; - if (!strncmp(sig, EFI64_LOADER_SIGNATURE, 4)) { + et = efi_get_type(boot_params); + if (et == EFI_TYPE_64) efi_64 = true; - } else if (!strncmp(sig, EFI32_LOADER_SIGNATURE, 4)) { + else if (et == EFI_TYPE_32) efi_64 = false; - } else { - debug_putstr("Wrong EFI loader signature.\n"); + else return 0; - } /* Get systab from boot params. */ + ei = &boot_params->efi_info; #ifdef CONFIG_X86_64 systab = ei->efi_systab | ((__u64)ei->efi_systab_hi << 32); #else - if (ei->efi_systab_hi || ei->efi_memmap_hi) { - debug_putstr("Error getting RSDP address: EFI system table located above 4GB.\n"); - return 0; - } systab = ei->efi_systab; #endif if (!systab) diff --git a/arch/x86/boot/compressed/efi.c b/arch/x86/boot/compressed/efi.c new file mode 100644 index 000000000000..bad0ce3e2ef6 --- /dev/null +++ b/arch/x86/boot/compressed/efi.c @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Helpers for early access to EFI configuration table. + * + * Originally derived from arch/x86/boot/compressed/acpi.c + */ + +#include "misc.h" +#include +#include + +/** + * efi_get_type - Given a pointer to boot_params, determine the type of EFI environment. + * + * @bp: pointer to boot_params + * + * Return: EFI_TYPE_{32,64} for valid EFI environments, EFI_TYPE_NONE otherwise. + */ +enum efi_type efi_get_type(struct boot_params *bp) +{ + struct efi_info *ei; + enum efi_type et; + const char *sig; + + ei = &bp->efi_info; + sig = (char *)&ei->efi_loader_signature; + + if (!strncmp(sig, EFI64_LOADER_SIGNATURE, 4)) { + et = EFI_TYPE_64; + } else if (!strncmp(sig, EFI32_LOADER_SIGNATURE, 4)) { + et = EFI_TYPE_32; + } else { + debug_putstr("No EFI environment detected.\n"); + et = EFI_TYPE_NONE; + } + +#ifndef CONFIG_X86_64 + /* + * Existing callers like acpi.c treat this case as an indicator to + * fall-through to non-EFI, rather than an error, so maintain that + * functionality here as well. + */ + if (ei->efi_systab_hi || ei->efi_memmap_hi) { + debug_putstr("EFI system table is located above 4GB and cannot be accessed.\n"); + et = EFI_TYPE_NONE; + } +#endif + + return et; +} diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index 01cc13c12059..fede1afa39e9 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -176,4 +176,20 @@ void boot_stage2_vc(void); unsigned long sev_verify_cbit(unsigned long cr3); +enum efi_type { + EFI_TYPE_64, + EFI_TYPE_32, + EFI_TYPE_NONE, +}; + +#ifdef CONFIG_EFI +/* helpers for early EFI config table access */ +enum efi_type efi_get_type(struct boot_params *bp); +#else +static inline enum efi_type efi_get_type(struct boot_params *bp) +{ + return EFI_TYPE_NONE; +} +#endif /* CONFIG_EFI */ + #endif /* BOOT_COMPRESSED_MISC_H */