From patchwork Wed Feb 9 18:10:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brijesh Singh X-Patchwork-Id: 12740648 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 194C9C433FE for ; Wed, 9 Feb 2022 18:12:23 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 2FA748D0016; Wed, 9 Feb 2022 13:12:14 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 281728D0011; Wed, 9 Feb 2022 13:12:14 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0FDA18D0016; Wed, 9 Feb 2022 13:12:13 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0173.hostedemail.com [216.40.44.173]) by kanga.kvack.org (Postfix) with ESMTP id C98E48D0011 for ; Wed, 9 Feb 2022 13:12:13 -0500 (EST) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 8A8F395B1B for ; Wed, 9 Feb 2022 18:12:13 +0000 (UTC) X-FDA: 79124035746.14.61CF47F Received: from NAM02-DM3-obe.outbound.protection.outlook.com (mail-dm3nam07on2089.outbound.protection.outlook.com [40.107.95.89]) by imf11.hostedemail.com (Postfix) with ESMTP id EC8F340006 for ; Wed, 9 Feb 2022 18:12:12 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=nH8wL8HzM72Uz3aLXOqK++XjqNl4eormWl/8jCk4hD3QwvQtg+kK9ZdQ98HmUT2zJ/ImqWyUYesOJwpUPr6bJPjjNMB/VK7KM0+4w+9ZYF8y45+/aBJLoiuPaAtn4zjMoUrpVSIurrVcnSvema1zAGsWvUbL2WzoSXpDs6sG2P4I/B6kDVr8QZqWlO/MXQmoAevz1ZJX1L7LUZmmgO059LDUPiU/FDy1HlLni0W5sPHB2AyZBTbYzbTd9B2aGSeqFwkZOqoOdBku49h7hGtOeIyxrQ70Y1LcaFDwb1VGd9+gkcFeW/RjaOZU5ubA014Av/GMCzqqe8xbdWlJ7Mx1kA== 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=BTXr+HEEpO9A+n2oRY59Iqncni6p+8Q/DauJQgoGHDV5RsEmYzSNoA6vHexcO2o/eWI9xEIMVQLtC6i34TTre7afHO7yk8dgoRWcPwDAQStX9AuZglQ2jq3n1VYsFZpMKgg0L7iIq7MbaRM8S6sVq7OPzjDt21vdez0sO4dpgi5R/M6UUPNqewYCsTN5B8FEBDWq0FMtWy8AOl/974iSjWorw8gm2j/EIqeeOC2zNemKYyFFWnOW6JjjgZvOP/AaGx0zCi63U/+A8Kizg9QflcGvlDhhvxVeKjnxM/RmEiJOQzyz150cXjig2kqHRa32mnJEh2FZyZL6ciVLCO9Waw== 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=S/Mtj5IvmgqmTM/UjlyppD32FgZMT2OogqjoN3bxRMWptXJuUXfqORfcxAkHQysEMsL3pSoBAS/UGLjjuy/XxYRTIK1tV8CzioCyoBz0VBVAV7Zv5h2r/Xuq5HGa1zIUGw9WhSmPQZGtQ7EI7rfdkV5+vXtu218T4mG/0ZEdVa4= Received: from BN9PR03CA0639.namprd03.prod.outlook.com (2603:10b6:408:13b::14) by DM6PR12MB2844.namprd12.prod.outlook.com (2603:10b6:5:45::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4951.18; Wed, 9 Feb 2022 18:12:09 +0000 Received: from BN8NAM11FT010.eop-nam11.prod.protection.outlook.com (2603:10b6:408:13b:cafe::83) by BN9PR03CA0639.outlook.office365.com (2603:10b6:408:13b::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4975.11 via Frontend Transport; Wed, 9 Feb 2022 18:12:08 +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 BN8NAM11FT010.mail.protection.outlook.com (10.13.177.53) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.4975.11 via Frontend Transport; Wed, 9 Feb 2022 18:12:08 +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; Wed, 9 Feb 2022 12:12:06 -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 v10 24/45] x86/compressed/acpi: Move EFI detection to helper Date: Wed, 9 Feb 2022 12:10:18 -0600 Message-ID: <20220209181039.1262882-25-brijesh.singh@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220209181039.1262882-1-brijesh.singh@amd.com> References: <20220209181039.1262882-1-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: 8f28645b-14d1-4f53-89a4-08d9ebf7afbd X-MS-TrafficTypeDiagnostic: DM6PR12MB2844:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3631; 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)(40470700004)(36840700001)(46966006)(7416002)(44832011)(5660300002)(7406005)(4326008)(8676002)(70586007)(8936002)(70206006)(82310400004)(2906002)(36756003)(83380400001)(36860700001)(47076005)(40460700003)(86362001)(356005)(508600001)(81166007)(186003)(336012)(426003)(110136005)(54906003)(16526019)(316002)(6666004)(2616005)(7696005)(26005)(1076003)(2101003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Feb 2022 18:12:08.6894 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8f28645b-14d1-4f53-89a4-08d9ebf7afbd 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: BN8NAM11FT010.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB2844 X-Rspamd-Queue-Id: EC8F340006 X-Stat-Signature: 1q3jk81phdokr5bnwogmekdhyy44ckix X-Rspam-User: Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=amd.com header.s=selector1 header.b="S/Mtj5Iv"; spf=pass (imf11.hostedemail.com: domain of brijesh.singh@amd.com designates 40.107.95.89 as permitted sender) smtp.mailfrom=brijesh.singh@amd.com; dmarc=pass (policy=quarantine) header.from=amd.com X-Rspamd-Server: rspam05 X-HE-Tag: 1644430332-871648 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 */