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Shutemov" X-Patchwork-Id: 11068323 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A72B91399 for ; Wed, 31 Jul 2019 15:23:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 93E72209CE for ; Wed, 31 Jul 2019 15:23:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 87E43200E7; Wed, 31 Jul 2019 15:23:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0702F209CE for ; Wed, 31 Jul 2019 15:23:55 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 317CC8E003A; Wed, 31 Jul 2019 11:23:51 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 2A1718E003C; Wed, 31 Jul 2019 11:23:51 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0A7EE8E003A; Wed, 31 Jul 2019 11:23:51 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from mail-ed1-f71.google.com (mail-ed1-f71.google.com [209.85.208.71]) by kanga.kvack.org (Postfix) with ESMTP id A38CA8E003B for ; Wed, 31 Jul 2019 11:23:50 -0400 (EDT) Received: by mail-ed1-f71.google.com with SMTP id f3so42592537edx.10 for ; Wed, 31 Jul 2019 08:23:50 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:from:to:cc:subject:date :message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=UJ4hP1jpsdk64Bv8Sf387CJe/yf6g4uoo14C+HjaYmc=; b=gOwieCgGd9x+ZHQwaJfj+XiMfXNkBSxx6jqLXGy1uygu8I+wKe2sX/DHdv5Dnqw1fU CyNLBiQVEUGjiBe+dzk+eoiZjAueZxI0g1oUNB9Y1MID3bIxSOCPVTYL0S0qvrgCD8V1 Rp1NyHaST7HS1TfvSJfJlDih7tnN7pFvJHrdCP4sAOakjznMjjfVRRj8lVbBiYiewKZ4 kYDZwJ64jgSkTTL0UIhvP2+1EK454U9LtJGMLwqk/GO+uUsOFBhiuxJ/W+vQJW2gson+ mbSLVMBznZbmgAysRkk19L4E0M0VEc6IKBcdUBCy4PGHHGlQNACkF4RVYyGlfzhIQ0ee xALw== X-Gm-Message-State: APjAAAUA03U1sxQck3JbHSQC9lpXBzPYAqs1UhotVpVoDUYhj34vJbya iO2AdJJoqO7ue2jeEGlbsBFICUNVbBqmEtao24fFpnUHiCYvy0tOlYwkbUroUTyTSXKidliyVc/ ZEndhlW12V57fCjD7IAWsGduE3nBjR8OYY9U2VPmT22a0CZeKa9VSJdjeLLfmhXA= X-Received: by 2002:a17:906:a39a:: with SMTP id k26mr46335202ejz.82.1564586630179; Wed, 31 Jul 2019 08:23:50 -0700 (PDT) X-Received: by 2002:a17:906:a39a:: with SMTP id k26mr46335105ejz.82.1564586628824; Wed, 31 Jul 2019 08:23:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1564586628; cv=none; d=google.com; s=arc-20160816; b=Q1GT9JGrcKMftk3efa41rbNhjUq4HAOe4g3tvS4QjnNcUblqX7ZE18jI52ua3bmIlf zPuvyxElvgBafKULc+BiVY1oej3gLFfoz1Y9XgWgcy18Kb1j35kJaLkQrSp0MnjdwOx6 3LbnBZG7nwDcuoGzEpbcC1TAPjLp/4o06C5Shiwt0VBY7LcexYm8qXKpV7o+rQPGXq/F jGvk79uScZ7eiWC7QSFX6Dxs5DATq/MucolvxhcStuygWIZjKeeiyqPUCU8Zm3w5s06b rf2IsL+53d6/VtrkgX11Z9XM5DaC3ZZQ6kCgEr9zOmp2ZxRtUXQO7GPE+HVn/dqVgu4/ VF5Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=UJ4hP1jpsdk64Bv8Sf387CJe/yf6g4uoo14C+HjaYmc=; b=oU/PUK+BRjgrF9NWAPZ8nA+3dM9FTG1Rf/YnHHMFU45/MU7OYj8sW2V+6nLTl8ex7P 5xYUIg2Y0HH7ryCBTE2FAo895aqkW2PhKBHkLWjDHLf+e1V7sfa/ulOZIAFtQcwjvDmP Kjo0z/KsltyaVVogwk9oDcjx1YhvAUvtCVwWv0i+d3NQu8aTO5MTyOF6MdvEEC/qAsao I0a1OGvrYzuu9xeO8Z30F4bhugAZAvbtf0uXe1T9PE2QgmfUxtlJnA6+tlhZVo4vcXaS VWJssWO8FxbO2UsV9jOHZqs3b3t5ZIuKLGbOPIbOipSmBb07gegsJNKwgXaEO2OuB0xI QBEA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@shutemov-name.20150623.gappssmtp.com header.s=20150623 header.b=1WGj7wJ1; spf=neutral (google.com: 209.85.220.65 is neither permitted nor denied by best guess record for domain of kirill@shutemov.name) smtp.mailfrom=kirill@shutemov.name Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. 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Shutemov" X-Google-Original-From: "Kirill A. Shutemov" Received: by box.localdomain (Postfix, from userid 1000) id 6575C1048A4; Wed, 31 Jul 2019 18:08:17 +0300 (+03) To: Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Borislav Petkov , Peter Zijlstra , Andy Lutomirski , David Howells Cc: Kees Cook , Dave Hansen , Kai Huang , Jacob Pan , Alison Schofield , linux-mm@kvack.org, kvm@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv2 52/59] x86/mm: Disable MKTME if not all system memory supports encryption Date: Wed, 31 Jul 2019 18:08:06 +0300 Message-Id: <20190731150813.26289-53-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190731150813.26289-1-kirill.shutemov@linux.intel.com> References: <20190731150813.26289-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 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: X-Virus-Scanned: ClamAV using ClamSMTP UEFI memory attribute EFI_MEMORY_CPU_CRYPTO indicates whether the memory region supports encryption. Kernel doesn't handle situation when only part of the system memory supports encryption. Disable MKTME if not all system memory supports encryption. Signed-off-by: Kirill A. Shutemov --- arch/x86/mm/mktme.c | 35 +++++++++++++++++++++++++++++++++++ drivers/firmware/efi/efi.c | 25 +++++++++++++------------ include/linux/efi.h | 1 + 3 files changed, 49 insertions(+), 12 deletions(-) diff --git a/arch/x86/mm/mktme.c b/arch/x86/mm/mktme.c index 17366d81c21b..4e00c244478b 100644 --- a/arch/x86/mm/mktme.c +++ b/arch/x86/mm/mktme.c @@ -1,9 +1,11 @@ #include #include #include +#include #include #include #include +#include /* Mask to extract KeyID from physical address. */ phys_addr_t __mktme_keyid_mask; @@ -48,9 +50,42 @@ void mktme_disable(void) static bool need_page_mktme(void) { + int nid; + /* Make sure keyid doesn't collide with extended page flags */ BUILD_BUG_ON(__NR_PAGE_EXT_FLAGS > 16); + if (!mktme_nr_keyids()) + return 0; + + for_each_node_state(nid, N_MEMORY) { + const efi_memory_desc_t *md; + unsigned long node_start, node_end; + + node_start = node_start_pfn(nid) << PAGE_SHIFT; + node_end = node_end_pfn(nid) << PAGE_SHIFT; + + for_each_efi_memory_desc(md) { + u64 efi_start = md->phys_addr; + u64 efi_end = md->phys_addr + PAGE_SIZE * md->num_pages; + + if (md->attribute & EFI_MEMORY_CPU_CRYPTO) + continue; + if (efi_start > node_end) + continue; + if (efi_end < node_start) + continue; + if (!e820__mapped_any(efi_start, efi_end, E820_TYPE_RAM)) + continue; + + printk("Memory range %#llx-%#llx: doesn't support encryption\n", + efi_start, efi_end); + printk("Disable MKTME\n"); + mktme_disable(); + break; + } + } + return !!mktme_nr_keyids(); } diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index ad3b1f4866b3..fc19da5da3e8 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -852,25 +852,26 @@ char * __init efi_md_typeattr_format(char *buf, size_t size, if (attr & ~(EFI_MEMORY_UC | EFI_MEMORY_WC | EFI_MEMORY_WT | EFI_MEMORY_WB | EFI_MEMORY_UCE | EFI_MEMORY_RO | EFI_MEMORY_WP | EFI_MEMORY_RP | EFI_MEMORY_XP | - EFI_MEMORY_NV | + EFI_MEMORY_NV | EFI_MEMORY_CPU_CRYPTO | EFI_MEMORY_RUNTIME | EFI_MEMORY_MORE_RELIABLE)) snprintf(pos, size, "|attr=0x%016llx]", (unsigned long long)attr); else snprintf(pos, size, - "|%3s|%2s|%2s|%2s|%2s|%2s|%2s|%3s|%2s|%2s|%2s|%2s]", + "|%3s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%3s|%2s|%2s|%2s|%2s]", attr & EFI_MEMORY_RUNTIME ? "RUN" : "", attr & EFI_MEMORY_MORE_RELIABLE ? "MR" : "", - attr & EFI_MEMORY_NV ? "NV" : "", - attr & EFI_MEMORY_XP ? "XP" : "", - attr & EFI_MEMORY_RP ? "RP" : "", - attr & EFI_MEMORY_WP ? "WP" : "", - attr & EFI_MEMORY_RO ? "RO" : "", - attr & EFI_MEMORY_UCE ? "UCE" : "", - attr & EFI_MEMORY_WB ? "WB" : "", - attr & EFI_MEMORY_WT ? "WT" : "", - attr & EFI_MEMORY_WC ? "WC" : "", - attr & EFI_MEMORY_UC ? "UC" : ""); + attr & EFI_MEMORY_NV ? "NV" : "", + attr & EFI_MEMORY_CPU_CRYPTO ? "CR" : "", + attr & EFI_MEMORY_XP ? "XP" : "", + attr & EFI_MEMORY_RP ? "RP" : "", + attr & EFI_MEMORY_WP ? "WP" : "", + attr & EFI_MEMORY_RO ? "RO" : "", + attr & EFI_MEMORY_UCE ? "UCE" : "", + attr & EFI_MEMORY_WB ? "WB" : "", + attr & EFI_MEMORY_WT ? "WT" : "", + attr & EFI_MEMORY_WC ? "WC" : "", + attr & EFI_MEMORY_UC ? "UC" : ""); return buf; } diff --git a/include/linux/efi.h b/include/linux/efi.h index f87fabea4a85..4ac54a168ffe 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -112,6 +112,7 @@ typedef struct { #define EFI_MEMORY_MORE_RELIABLE \ ((u64)0x0000000000010000ULL) /* higher reliability */ #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */ +#define EFI_MEMORY_CPU_CRYPTO ((u64)0x0000000000080000ULL) /* memory encryption supported */ #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ #define EFI_MEMORY_DESCRIPTOR_VERSION 1