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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, T_DKIMWL_WL_HIGH,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 22CC0C004C9 for ; Tue, 7 May 2019 05:50:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E7775205ED for ; Tue, 7 May 2019 05:49:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557208200; bh=uhf7mZGFe92exMx09nG6PaA1Xh8RhBtl/QjxrNyARJA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xEwmdmvabA4bmr83HBfnyY7QNfv90eUtzjPp26/RGOWnngsoLI72d1jHvdu5V2zRR Sv23C2OBOV3Z4UZQRL/BGn6WsZUmxbhQ1Q961G0Ek914a7noZ1NsYbdGdPG1cae4p/ wLQttzzt0If0wi/m4RWnYaUy1R0KTeHG/Jb4NaZ4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729157AbfEGFt6 (ORCPT ); Tue, 7 May 2019 01:49:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:59830 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729086AbfEGFkT (ORCPT ); Tue, 7 May 2019 01:40:19 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9F28E214AE; Tue, 7 May 2019 05:40:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557207619; bh=uhf7mZGFe92exMx09nG6PaA1Xh8RhBtl/QjxrNyARJA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iw+taorbqtCKK3s8qMe2teskLUgASYK6AHJQPB4E0qIVMYBdwuGeIDX3eYi7KB8YD hGupHsWbdavvnZRvLTUtGyYywJVGLV3OZ+5K7qD4cG1l65ECozaWUC/xPltCMS30An I6t1id15RLKZ3cF2q0gi/dsrhlBonmFfv7H6cLQc= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Martin Schwidefsky , "Kirill A . Shutemov" , Sasha Levin , linux-arch@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 61/95] mm: introduce mm_[p4d|pud|pmd]_folded Date: Tue, 7 May 2019 01:37:50 -0400 Message-Id: <20190507053826.31622-61-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190507053826.31622-1-sashal@kernel.org> References: <20190507053826.31622-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Martin Schwidefsky [ Upstream commit 1071fc5779d9846fec56a4ff6089ab08cac1ab72 ] Add three architecture overrideable functions to test if the p4d, pud, or pmd layer of a page table is folded or not. Acked-by: Kirill A. Shutemov Signed-off-by: Martin Schwidefsky Signed-off-by: Sasha Levin --- include/asm-generic/pgtable.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index f00421dfacbd..0c21014a38f2 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1081,4 +1081,20 @@ static inline bool arch_has_pfn_modify_check(void) #endif #endif +/* + * On some architectures it depends on the mm if the p4d/pud or pmd + * layer of the page table hierarchy is folded or not. + */ +#ifndef mm_p4d_folded +#define mm_p4d_folded(mm) __is_defined(__PAGETABLE_P4D_FOLDED) +#endif + +#ifndef mm_pud_folded +#define mm_pud_folded(mm) __is_defined(__PAGETABLE_PUD_FOLDED) +#endif + +#ifndef mm_pmd_folded +#define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) +#endif + #endif /* _ASM_GENERIC_PGTABLE_H */ -- 2.20.1