From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0866DECDFAA for ; Wed, 18 Jul 2018 09:43:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B29AB20862 for ; Wed, 18 Jul 2018 09:43:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=8bytes.org header.i=@8bytes.org header.b="PtCL21px" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B29AB20862 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732009AbeGRKUo (ORCPT ); Wed, 18 Jul 2018 06:20:44 -0400 Received: from 8bytes.org ([81.169.241.247]:53936 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731612AbeGRKSe (ORCPT ); Wed, 18 Jul 2018 06:18:34 -0400 Received: by theia.8bytes.org (Postfix, from userid 1000) id 00BFD7D5; Wed, 18 Jul 2018 11:41:21 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=8bytes.org; s=mail-1; t=1531906882; bh=wdFK4c7N0vVUj2/eoP/DxBsYH1HhiIX6pQY/IoaNsLU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PtCL21px7r0N1DA0xPJMQhGMw/kBZo5v8JbJBpjo3vk4Dq74vrRSdzf2Gzkv4JJBf XwndAhhF9ixRa//GyUE315Nd7uAUxcfPBO/5lt9bRuO9uUn45r//miHY+cSshpWB2H ZPGWQjjurAJnUln3piA4QUOaPBhiQ4r60RwPsM08plrj0vqZp+NwvS+2pk6Q5RBt/U /1i5FN+P8o/tmIDdd8DmB0PyDWy9ooNEkLqOIMMXLx8HuHLrOBJwmCNDCL7zecU+eH kit163f9x09d+fqwE5Dj8C+iD2c0pi1536SVDWvLuVS5afpS+YdnFlR//yAU0HIEWn /YGHj/49X9HJg== From: Joerg Roedel To: Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" Cc: x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds , Andy Lutomirski , Dave Hansen , Josh Poimboeuf , Juergen Gross , Peter Zijlstra , Borislav Petkov , Jiri Kosina , Boris Ostrovsky , Brian Gerst , David Laight , Denys Vlasenko , Eduardo Valentin , Greg KH , Will Deacon , aliguori@amazon.com, daniel.gruss@iaik.tugraz.at, hughd@google.com, keescook@google.com, Andrea Arcangeli , Waiman Long , Pavel Machek , "David H . Gutteridge" , jroedel@suse.de, joro@8bytes.org Subject: [PATCH 19/39] x86/pgtable: Move pti_set_user_pgtbl() to pgtable.h Date: Wed, 18 Jul 2018 11:40:56 +0200 Message-Id: <1531906876-13451-20-git-send-email-joro@8bytes.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1531906876-13451-1-git-send-email-joro@8bytes.org> References: <1531906876-13451-1-git-send-email-joro@8bytes.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joerg Roedel There it is also usable from 32 bit code. Signed-off-by: Joerg Roedel --- arch/x86/include/asm/pgtable.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index eb47432..cc117161 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -640,8 +640,31 @@ static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, pmd_t *populate_extra_pmd(unsigned long vaddr); pte_t *populate_extra_pte(unsigned long vaddr); + +#ifdef CONFIG_PAGE_TABLE_ISOLATION +pgd_t __pti_set_user_pgtbl(pgd_t *pgdp, pgd_t pgd); + +/* + * Take a PGD location (pgdp) and a pgd value that needs to be set there. + * Populates the user and returns the resulting PGD that must be set in + * the kernel copy of the page tables. + */ +static inline pgd_t pti_set_user_pgtbl(pgd_t *pgdp, pgd_t pgd) +{ + if (!static_cpu_has(X86_FEATURE_PTI)) + return pgd; + return __pti_set_user_pgtbl(pgdp, pgd); +} +#else /* CONFIG_PAGE_TABLE_ISOLATION */ +static inline pgd_t pti_set_user_pgtbl(pgd_t *pgdp, pgd_t pgd) +{ + return pgd; +} +#endif /* CONFIG_PAGE_TABLE_ISOLATION */ + #endif /* __ASSEMBLY__ */ + #ifdef CONFIG_X86_32 # include #else -- 2.7.4