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Shutemov" X-Patchwork-Id: 11068095 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 AF77113A4 for ; Wed, 31 Jul 2019 15:09:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9B11B1FFD8 for ; Wed, 31 Jul 2019 15:09:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8E5BF201B1; Wed, 31 Jul 2019 15:09:03 +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=ham 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 20B331FFD8 for ; Wed, 31 Jul 2019 15:09:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DF9998E0016; Wed, 31 Jul 2019 11:08:29 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id D87BC8E0015; Wed, 31 Jul 2019 11:08:29 -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 B877C8E0016; Wed, 31 Jul 2019 11:08:29 -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 6788E8E0015 for ; Wed, 31 Jul 2019 11:08:29 -0400 (EDT) Received: by mail-ed1-f71.google.com with SMTP id b12so42546561ede.23 for ; Wed, 31 Jul 2019 08:08:29 -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=3Khe0ucVPgmVgmnJxVPmTI2qFbR46a/XU3GbaeIl9uc=; b=o8pNKTFX70Le8eKmPSCRaPgkjaQ3UbX6uzugicDt6ou8ySqswashzeENu0UHO0JA3d v81w6BgFByxh1VWwJTOiZ7/HrX//u4Smn+5r7fU/wQ1cCdrRhUfDZIJ5FVcdcqltvcF+ 8JWtu7Jm9dMS3wTWRi5iowd6KZhPytT3g8lyLp5hhA6sP9QCIukG75eDbSr00q6p12xp R2LIb5DcOTzuy+L+hqBhD65oyZp22rUHl4nKt2W9OwQTpk7Zk2NEYsBEnWaMY9arx5XB vrGEjFFpPNrCgZhHVDRcsM2cq8uuiWtRI0xRquGZIl8lmtPUErRZljX/802bSK71sHQN FIww== X-Gm-Message-State: APjAAAUMPIjiJ0TGuH7JZpH6F0EPDwTnR8nwnKAfipCthiPszkIyvjo1 SnXPDw2QdfdQhs+0kVINzULcT5rNvJj3S+Fjt4GQut5epFXDfg/PjW0XB/EQzZ1XlItRTYsa8GC 2BIpLUNZvC7fv4Bw7rUArz3k4SUp9vWS6leGVanVjq6tBy3V5j9I6V0QYAY5cLIY= X-Received: by 2002:a50:b803:: with SMTP id j3mr105078544ede.208.1564585709004; Wed, 31 Jul 2019 08:08:29 -0700 (PDT) X-Received: by 2002:a50:b803:: with SMTP id j3mr105078410ede.208.1564585707763; Wed, 31 Jul 2019 08:08:27 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1564585707; cv=none; d=google.com; s=arc-20160816; b=YeGS6yFMAO8Pq9VYaoXX8yWBGdxK4Nky2fSmrQrVIq8bI21RTDCIxqLV685kWuEfNd aOX13ak4FXV7Pyjgtcn6nLWFgJRJ8rdY/7LvJGUnwBgvaBjdxUCq2HzetaVnzPUwLn8B YJ1RnqcVqEmBE1to4n+WRE8H1/yveZ96qQnnFF3jFUirOkSLMjdn/Gx+6wqSrboTaPHq dyxev0Y2zVfFmvlamPOUaPcNftEnOefzVgcM7F77arLzKejklVv1mlqObhHaveBaE9b5 pQxyDZUeWa2TKyMiMLVTh7u5eVmTovX0Oqg6adKxkpqKbFnfQ/kQXdMzSTst7q6ZlR14 37tg== 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=3Khe0ucVPgmVgmnJxVPmTI2qFbR46a/XU3GbaeIl9uc=; b=g9TvYCIrjiHDWcS/FRxX/efiXzKW/oYkQ1IDVbcT5MfFAmNj+pWNghO5YphlzHkLio IgAP7jS2MU1hBYLkyUl5vk6Ky3IBxKS/ZK0RGlpFXCu4+BPH3u+a8lGlbWc1b7U+TAY0 RqUhTAZJ7K0z5OZAmeK7/ZyETcfqBqBPHuvSe+ldJpumJKWU1cRuXqXgGXU6ANkaelGF QOVILdgxlYL/VWYY/Shvl93WFkuCuDicvHBvQhqHndEDcPevr1JMbpVsnvxDe4EWeDCn MBtcAY2a5BFH+uoG04u88PMIGKhC+Msc8tPs+kS95JGPhDcAQU/KZJkcwDAi1SXl8fV9 FHBw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@shutemov-name.20150623.gappssmtp.com header.s=20150623 header.b="gQI/TJw+"; 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 56F3C1023AA; Wed, 31 Jul 2019 18:08:16 +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 15/59] x86/mm: Map zero pages into encrypted mappings correctly Date: Wed, 31 Jul 2019 18:07:29 +0300 Message-Id: <20190731150813.26289-16-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 Zero pages are never encrypted. Keep KeyID-0 for them. Signed-off-by: Kirill A. Shutemov --- arch/x86/include/asm/pgtable.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 0bc530c4eb13..f0dd80a920a9 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -820,6 +820,19 @@ static inline unsigned long pmd_index(unsigned long address) */ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) +#define mk_zero_pte mk_zero_pte +static inline pte_t mk_zero_pte(unsigned long addr, pgprot_t prot) +{ + extern unsigned long zero_pfn; + pte_t entry; + + prot.pgprot &= ~mktme_keyid_mask(); + entry = pfn_pte(zero_pfn, prot); + entry = pte_mkspecial(entry); + + return entry; +} + /* * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] * @@ -1153,6 +1166,12 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) +#define mk_zero_pmd(zero_page, prot) \ +({ \ + prot.pgprot &= ~mktme_keyid_mask(); \ + pmd_mkhuge(mk_pmd(zero_page, prot)); \ +}) + #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS extern int pmdp_set_access_flags(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp,