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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0592EC54E58 for ; Mon, 18 Mar 2024 20:12:07 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=JQm6TZ0X; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=dzVkvFdF; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4Tz5c551Wxz3w0f for ; Tue, 19 Mar 2024 07:12:05 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=JQm6TZ0X; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=dzVkvFdF; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=redhat.com (client-ip=170.10.129.124; helo=us-smtp-delivery-124.mimecast.com; envelope-from=peterx@redhat.com; receiver=lists.ozlabs.org) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Tz5RG4d6Zz3dSV for ; Tue, 19 Mar 2024 07:04:26 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1710792263; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xZurg04juSYF/uW9HtnhgkfMM1C/gArxmrpoVNEgvCQ=; b=JQm6TZ0Xyx9LmB28WJTTYDoz+agABGZ9/veAKeQkhn8TMDY1K+wHrKA1jD3iJLmB3zRBCl Agn1/P9d+C1/BMkZFymDwAcX6e6kNu1WnayDFDYG2FWnU///Iad6vfT9KWmG0KFd7zV2ja ZUOjaDeVW+ugincW7y1+E9KTdFuC0sk= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1710792264; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xZurg04juSYF/uW9HtnhgkfMM1C/gArxmrpoVNEgvCQ=; b=dzVkvFdFCLAuprbsPVzZQPG5WtMg2+8vltF0LZTyTf0+gLg6wSX6F+jCoDiUp7S98nKGTU ApnVTxX8v1gGpHBYNT3xFqpD+hALGS8wratphU2VsmJK34m6aBdpcOTp/j2xE1VIxkekww y2aKm6Va9/mTlR7HsiJGFq9QKs5ifLY= Received: from mail-qv1-f69.google.com (mail-qv1-f69.google.com [209.85.219.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-583-Z594V3T3P6GY-xzYBoQTVw-1; Mon, 18 Mar 2024 16:04:22 -0400 X-MC-Unique: Z594V3T3P6GY-xzYBoQTVw-1 Received: by mail-qv1-f69.google.com with SMTP id 6a1803df08f44-69627b26a51so2058776d6.1 for ; Mon, 18 Mar 2024 13:04:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710792258; x=1711397058; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=xZurg04juSYF/uW9HtnhgkfMM1C/gArxmrpoVNEgvCQ=; b=KfTZGQsQk81UEDAHasJmHlS/9HxnUTwu9Vn/3kN1lVfCERw6dXfhA+0YJmj31LPa6V Rcvkd4ushXAC+zse+AwtFNhQRK25ZqesaBdokITHcAMynB0Nk0f+isPNoMpcUt4q4qrZ 64G5vfo4OFEDenSU7lh98TZovPIamJBg26FElSW7fGv7VvlHOqz2gSdVvDnFxKpMCIHH sQfvVA0YsiJCnmgiV8vvA9wFlau6QknH/rFiT0yDGeKSOqlcQ5qLnz/KxhUM8OSs8trn C/RiYZ3fxO4lpuxM6ztsZU6gEvADBdYjPmTGbKR4eJY1f6QSjaRXxxzxJNg2PoCwUjcy uKqw== X-Forwarded-Encrypted: i=1; AJvYcCXM50yBsFn2e7DV2ZekriM2mZ97IGyYugmC+vkQcIXsjMw63RoWlMfY9yZwnRhK7Xw0Fd+D2sGz3eHgyonl4nqvuxLuNCUaQekxR8GbPw== X-Gm-Message-State: AOJu0YwD1XYyQzBTMj90ExVQuMJkAuoiZb9B70oMsWnb+7cWg/DhWS6/ 9LseXAB5mZx3ZVVmyzsouISmw9kNRh3PBV3d+twYjQnu+ajViHpzjikfS9ubLKDlmtiJexVEPzK x1FgnG9bJjTEeLF5ZpPqWkLzSysYBXsS5mY3/rLe4I/ozLcEfjfK3G75ZWx82Pmo= X-Received: by 2002:a05:6214:3f85:b0:690:9db6:f410 with SMTP id ow5-20020a0562143f8500b006909db6f410mr462665qvb.3.1710792258403; Mon, 18 Mar 2024 13:04:18 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGPMjFRvOQnrQWtPInqAdggXMmLflMtETkazIbCBO67t5p2Mbipn5U9tbb0PWyioZzi1AzvbQ== X-Received: by 2002:a05:6214:3f85:b0:690:9db6:f410 with SMTP id ow5-20020a0562143f8500b006909db6f410mr462644qvb.3.1710792258055; Mon, 18 Mar 2024 13:04:18 -0700 (PDT) Received: from x1n.. ([99.254.121.117]) by smtp.gmail.com with ESMTPSA id hj10-20020a05622a620a00b0042ebbc1196fsm3484491qtb.87.2024.03.18.13.04.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Mar 2024 13:04:17 -0700 (PDT) From: peterx@redhat.com To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 08/14] mm/arm64: Merge pXd_huge() and pXd_leaf() definitions Date: Mon, 18 Mar 2024 16:03:58 -0400 Message-ID: <20240318200404.448346-9-peterx@redhat.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240318200404.448346-1-peterx@redhat.com> References: <20240318200404.448346-1-peterx@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII"; x-default=true X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, Muchun Song , Will Deacon , Catalin Marinas , x86@kernel.org, Matthew Wilcox , peterx@redhat.com, Jason Gunthorpe , Mark Salter , sparclinux@vger.kernel.org, Andrew Morton , linuxppc-dev@lists.ozlabs.org, Mike Rapoport Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Peter Xu Unlike most archs, aarch64 defines pXd_huge() and pXd_leaf() slightly differently. Redefine the pXd_huge() with pXd_leaf(). There used to be two traps for old aarch64 definitions over these APIs that I found when reading the code around, they're: (1) 4797ec2dc83a ("arm64: fix pud_huge() for 2-level pagetables") (2) 23bc8f69f0ec ("arm64: mm: fix p?d_leaf()") Define pXd_huge() with the current pXd_leaf() will make sure (2) isn't a problem (on PROT_NONE checks). To make sure it also works for (1), we move over the __PAGETABLE_PMD_FOLDED check to pud_leaf(), allowing it to constantly returning "false" for 2-level pgtables, which looks even safer to cover both now. Cc: Muchun Song Cc: Mark Salter Cc: Catalin Marinas Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Peter Xu --- arch/arm64/include/asm/pgtable.h | 4 ++++ arch/arm64/mm/hugetlbpage.c | 8 ++------ 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 401087e8a43d..14d24c357c7a 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -704,7 +704,11 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd) #define pud_none(pud) (!pud_val(pud)) #define pud_bad(pud) (!pud_table(pud)) #define pud_present(pud) pte_present(pud_pte(pud)) +#ifndef __PAGETABLE_PMD_FOLDED #define pud_leaf(pud) (pud_present(pud) && !pud_table(pud)) +#else +#define pud_leaf(pud) false +#endif #define pud_valid(pud) pte_valid(pud_pte(pud)) #define pud_user(pud) pte_user(pud_pte(pud)) #define pud_user_exec(pud) pte_user_exec(pud_pte(pud)) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 0f0e10bb0a95..1234bbaef5bf 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -81,16 +81,12 @@ bool arch_hugetlb_migration_supported(struct hstate *h) int pmd_huge(pmd_t pmd) { - return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT); + return pmd_leaf(pmd); } int pud_huge(pud_t pud) { -#ifndef __PAGETABLE_PMD_FOLDED - return pud_val(pud) && !(pud_val(pud) & PUD_TABLE_BIT); -#else - return 0; -#endif + return pud_leaf(pud); } static int find_num_contig(struct mm_struct *mm, unsigned long addr, -- 2.44.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AFD865A782 for ; Mon, 18 Mar 2024 20:04:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710792263; cv=none; b=CFWGCX7C3ViO8M1Osco5/1G1bQgDWuv/lFkFN9CXQeLxn2RS2rU26pAFYmQ14w7OSwiTWsSRn8OvrSD4gHdJKaAhFlFLia7u8I9WWTyd4dgboYE4T83QHsS8dGTvteedz0o7Q69PR6QIFHfo79HWykIAheBnnfdzpe8oKja9jnM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710792263; c=relaxed/simple; bh=t18R28ny76a7TFkmozYcxNFR6pN9FqPc0sZ3mbG+iGw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XkMGo/QHkj6lfvks3jYP3Hx8BofIYEl0UmjFT+NrpoUw5c1u0c55AczDaoLPi4ctbsrSVl4eFeEjRgan3ZDAj3uzgegUEZJfVMJoA9zsWD7UqVLxb06a6a4OebuDU14OOl8Mq9QFR/dpmFBE3TXjmGoo1x1DJHOZ2+biHo5y7go= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=DkytdXhD; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="DkytdXhD" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1710792260; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xZurg04juSYF/uW9HtnhgkfMM1C/gArxmrpoVNEgvCQ=; b=DkytdXhD1GrMYt24VWx3kLetZvGHbfiaO7TcY892sitrLuC/qiRd3P0klYF292EtTrPL5R MBngzXYeTG0BMbSx3cYXpx/z8hpjxpmnpfuo8Kd0JoNawqqFq6islEuhqTcsUUcijeHdhI pP78hSJf10DTUpKi8lQsvud63ir9ubY= Received: from mail-qv1-f72.google.com (mail-qv1-f72.google.com [209.85.219.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-111-OOkzq_AIO6O0kYkUFoy9nQ-1; Mon, 18 Mar 2024 16:04:19 -0400 X-MC-Unique: OOkzq_AIO6O0kYkUFoy9nQ-1 Received: by mail-qv1-f72.google.com with SMTP id 6a1803df08f44-690c19ee50bso14534066d6.0 for ; Mon, 18 Mar 2024 13:04:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710792258; x=1711397058; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=xZurg04juSYF/uW9HtnhgkfMM1C/gArxmrpoVNEgvCQ=; b=Sl0AgdAXOxzgaxiBx1xTTolvbqUFo4Y3VGJo/TucEBIWoS8KqbSLUviEn0ppUZRJa+ qqSRTe8YUaQx9d019FlTh/Jf5ef4p2Z+ggWrCFs2H4RxWz2lj5M3FBYGIYWk15+OXWTd fEq+Xtj+W/MnZ/a/jE1v6/KG1A5Ls9n4msQCLxhIj557dsvQMOq5nZsWeirDck9IGUas cWywmnegCp43OC4zHSYH0GJhWTOr7Bmz5KxBg6h9ORx9JfmGvdDZ3U8Ruvebs/nqNfch wRHzevpxWDEJvBsOEug4cUy0VSPCF+O3PeviSNK+qqixBwfSApwBo31ljA9S68LndWgE sEkw== X-Forwarded-Encrypted: i=1; AJvYcCUVf4EFzAFhEdUAjWKp2dLKt+BIYe7Lsn9St59fMbLFHs9IHpJcteOreMA7asooNaoVBbpsratcPZQSlgke/Hve+5NfBbDV0WU8gQ== X-Gm-Message-State: AOJu0YyAhWylVd3XCoaENmreKBN/qs8QzXUwN7vnSLkbn21soGU3QFXs rTeIxtphmWuXe7Brnps/JoFMs37bK4JRq8jz6k2h8oUsdIjMYpCPCnz1v4XpGnoSwoHUoU82mdI 3J04oSEUVhUleeyNNH6P2pJnck9SJsW7t4VdCsPJ0CEZtTyPndHCse782i2mxxxlCzTc= X-Received: by 2002:a05:6214:3f85:b0:690:9db6:f410 with SMTP id ow5-20020a0562143f8500b006909db6f410mr462668qvb.3.1710792258407; Mon, 18 Mar 2024 13:04:18 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGPMjFRvOQnrQWtPInqAdggXMmLflMtETkazIbCBO67t5p2Mbipn5U9tbb0PWyioZzi1AzvbQ== X-Received: by 2002:a05:6214:3f85:b0:690:9db6:f410 with SMTP id ow5-20020a0562143f8500b006909db6f410mr462644qvb.3.1710792258055; Mon, 18 Mar 2024 13:04:18 -0700 (PDT) Received: from x1n.. ([99.254.121.117]) by smtp.gmail.com with ESMTPSA id hj10-20020a05622a620a00b0042ebbc1196fsm3484491qtb.87.2024.03.18.13.04.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Mar 2024 13:04:17 -0700 (PDT) From: peterx@redhat.com To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Andrew Morton , x86@kernel.org, Muchun Song , Mike Rapoport , Matthew Wilcox , sparclinux@vger.kernel.org, Jason Gunthorpe , linuxppc-dev@lists.ozlabs.org, Christophe Leroy , linux-arm-kernel@lists.infradead.org, peterx@redhat.com, Mark Salter , Catalin Marinas , Will Deacon Subject: [PATCH v2 08/14] mm/arm64: Merge pXd_huge() and pXd_leaf() definitions Date: Mon, 18 Mar 2024 16:03:58 -0400 Message-ID: <20240318200404.448346-9-peterx@redhat.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240318200404.448346-1-peterx@redhat.com> References: <20240318200404.448346-1-peterx@redhat.com> Precedence: bulk X-Mailing-List: sparclinux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Peter Xu Unlike most archs, aarch64 defines pXd_huge() and pXd_leaf() slightly differently. Redefine the pXd_huge() with pXd_leaf(). There used to be two traps for old aarch64 definitions over these APIs that I found when reading the code around, they're: (1) 4797ec2dc83a ("arm64: fix pud_huge() for 2-level pagetables") (2) 23bc8f69f0ec ("arm64: mm: fix p?d_leaf()") Define pXd_huge() with the current pXd_leaf() will make sure (2) isn't a problem (on PROT_NONE checks). To make sure it also works for (1), we move over the __PAGETABLE_PMD_FOLDED check to pud_leaf(), allowing it to constantly returning "false" for 2-level pgtables, which looks even safer to cover both now. Cc: Muchun Song Cc: Mark Salter Cc: Catalin Marinas Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Peter Xu --- arch/arm64/include/asm/pgtable.h | 4 ++++ arch/arm64/mm/hugetlbpage.c | 8 ++------ 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 401087e8a43d..14d24c357c7a 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -704,7 +704,11 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd) #define pud_none(pud) (!pud_val(pud)) #define pud_bad(pud) (!pud_table(pud)) #define pud_present(pud) pte_present(pud_pte(pud)) +#ifndef __PAGETABLE_PMD_FOLDED #define pud_leaf(pud) (pud_present(pud) && !pud_table(pud)) +#else +#define pud_leaf(pud) false +#endif #define pud_valid(pud) pte_valid(pud_pte(pud)) #define pud_user(pud) pte_user(pud_pte(pud)) #define pud_user_exec(pud) pte_user_exec(pud_pte(pud)) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 0f0e10bb0a95..1234bbaef5bf 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -81,16 +81,12 @@ bool arch_hugetlb_migration_supported(struct hstate *h) int pmd_huge(pmd_t pmd) { - return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT); + return pmd_leaf(pmd); } int pud_huge(pud_t pud) { -#ifndef __PAGETABLE_PMD_FOLDED - return pud_val(pud) && !(pud_val(pud) & PUD_TABLE_BIT); -#else - return 0; -#endif + return pud_leaf(pud); } static int find_num_contig(struct mm_struct *mm, unsigned long addr, -- 2.44.0 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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3731FC54E69 for ; Mon, 18 Mar 2024 20:05:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=123TQ/RCqA1ukHAuySfJmY8HWFAFRArZr/m8trieBEM=; b=yr7a7uz+Mg5itd sbuM1XNNVkfBRAkZZNe/lVutspbtFl0GJLOrsLQ1u+5ifqRbz9DXhFwSHltsNxRBWaPkfh+F50QzD ruiyAEO4kUpoekwYJXLrIAlXAe8OuyDgDmbjyjmg7hnUGPmoSyLujGaKO4BJ/tZHw850hdAMOdRjw DFEI8c6Vp/5INtAVL299mt8Uxl2jT5GdDn8QagdqBQYxeHgNdJrEz0edHGME3gN91swCT7Yv2MaFW 7cG+qTJMUwm2fOanVl7JDXdOC//7c6s4lXJ1lW41hvSkgD7FvOnqjZgulANmcKoeVIlDRO57FQf/1 rHolQxoWYDB57xF5CJ/w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rmJE4-00000009xWe-07kp; Mon, 18 Mar 2024 20:04:52 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rmJDa-00000009x5O-0jL9 for linux-arm-kernel@lists.infradead.org; Mon, 18 Mar 2024 20:04:26 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1710792261; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xZurg04juSYF/uW9HtnhgkfMM1C/gArxmrpoVNEgvCQ=; b=O3WmJ+n7XNNnxgnQ25kBqfo+fbeEk/1Y1UiHc/I+r1s+Jnm+U+jSTPJ08K6OeOSQz9nJQ2 FWBtcUPwIt5fVkYDpa+8pXRHJkFZDyV+JIRXsdW+4lR6GGV4VMdIwY6LuJNVvNUKn3eYrP RpTRI2839yVkqxy7+KfOsholIY7pkxg= Received: from mail-qv1-f70.google.com (mail-qv1-f70.google.com [209.85.219.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-590-q8itZ9TRPxCKBdHZRK1abA-1; Mon, 18 Mar 2024 16:04:20 -0400 X-MC-Unique: q8itZ9TRPxCKBdHZRK1abA-1 Received: by mail-qv1-f70.google.com with SMTP id 6a1803df08f44-69627b26a51so2058736d6.1 for ; Mon, 18 Mar 2024 13:04:18 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710792258; x=1711397058; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=xZurg04juSYF/uW9HtnhgkfMM1C/gArxmrpoVNEgvCQ=; b=gvlo3dtIybFgNNHXx2lVQw2G1hSKKaDDKGbrIYVBBZJrmnHTHJOgkNNMFRzofCY/Lw nFfGKyFhS9JX/LM8f7SHG+pQtYlqPtfFMUhVZveD49XRso13EKDEYTN0sjkd7eVqg/t3 45rFk+21GZoGBD2QIfTKEqPdUvD78kXWI7uFNBwv0x1yDQU6gbK91hUUkbYfYZBHMnM3 AXnQa6OkwIlE+goejRyoctUzncRqHBIRMML/Mh09xtQuewL2IL6BhSnnULVLwJbab8E9 EVMDdyY2We8HrigbgDznCgDOxXKBRqtuSYQi7WA/wvg3XdQaSwhSzR88LVxvdmsaFTZg lbIw== X-Forwarded-Encrypted: i=1; AJvYcCUTH7+PYQlPoyhtzX37nyl8KLSbRfvVKIWHl2VCJSN5JHRTQARNoNEdff3gV2V7gXH2hscfKkshZgKP4XD+Q4rFe05/sDVUdHO8WIcxSbPXWufrg5k= X-Gm-Message-State: AOJu0YwxTcH2uIgsmROEMHpD3x9DlZplAOFNjKh2kXLFofYZaBRRSVos DDvZNAS6Ct+qlUZSbwar1/ZSGH6oig8hO7OFbr4VKlUAQ+hXDywQWYS88zHTDV/6m6E24W5muXi 0+NSJ5mBV6B23Y8prTpRATN/qEq6F1lD5ouItbAMMz73Sr/HQd3F7Vd0wx2Vwl5353dm0vL8X X-Received: by 2002:a05:6214:3f85:b0:690:9db6:f410 with SMTP id ow5-20020a0562143f8500b006909db6f410mr462675qvb.3.1710792258412; Mon, 18 Mar 2024 13:04:18 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGPMjFRvOQnrQWtPInqAdggXMmLflMtETkazIbCBO67t5p2Mbipn5U9tbb0PWyioZzi1AzvbQ== X-Received: by 2002:a05:6214:3f85:b0:690:9db6:f410 with SMTP id ow5-20020a0562143f8500b006909db6f410mr462644qvb.3.1710792258055; Mon, 18 Mar 2024 13:04:18 -0700 (PDT) Received: from x1n.. ([99.254.121.117]) by smtp.gmail.com with ESMTPSA id hj10-20020a05622a620a00b0042ebbc1196fsm3484491qtb.87.2024.03.18.13.04.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Mar 2024 13:04:17 -0700 (PDT) From: peterx@redhat.com To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Andrew Morton , x86@kernel.org, Muchun Song , Mike Rapoport , Matthew Wilcox , sparclinux@vger.kernel.org, Jason Gunthorpe , linuxppc-dev@lists.ozlabs.org, Christophe Leroy , linux-arm-kernel@lists.infradead.org, peterx@redhat.com, Mark Salter , Catalin Marinas , Will Deacon Subject: [PATCH v2 08/14] mm/arm64: Merge pXd_huge() and pXd_leaf() definitions Date: Mon, 18 Mar 2024 16:03:58 -0400 Message-ID: <20240318200404.448346-9-peterx@redhat.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240318200404.448346-1-peterx@redhat.com> References: <20240318200404.448346-1-peterx@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240318_130422_465430_8E4A5F0E X-CRM114-Status: GOOD ( 14.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Peter Xu Unlike most archs, aarch64 defines pXd_huge() and pXd_leaf() slightly differently. Redefine the pXd_huge() with pXd_leaf(). There used to be two traps for old aarch64 definitions over these APIs that I found when reading the code around, they're: (1) 4797ec2dc83a ("arm64: fix pud_huge() for 2-level pagetables") (2) 23bc8f69f0ec ("arm64: mm: fix p?d_leaf()") Define pXd_huge() with the current pXd_leaf() will make sure (2) isn't a problem (on PROT_NONE checks). To make sure it also works for (1), we move over the __PAGETABLE_PMD_FOLDED check to pud_leaf(), allowing it to constantly returning "false" for 2-level pgtables, which looks even safer to cover both now. Cc: Muchun Song Cc: Mark Salter Cc: Catalin Marinas Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Peter Xu --- arch/arm64/include/asm/pgtable.h | 4 ++++ arch/arm64/mm/hugetlbpage.c | 8 ++------ 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 401087e8a43d..14d24c357c7a 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -704,7 +704,11 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd) #define pud_none(pud) (!pud_val(pud)) #define pud_bad(pud) (!pud_table(pud)) #define pud_present(pud) pte_present(pud_pte(pud)) +#ifndef __PAGETABLE_PMD_FOLDED #define pud_leaf(pud) (pud_present(pud) && !pud_table(pud)) +#else +#define pud_leaf(pud) false +#endif #define pud_valid(pud) pte_valid(pud_pte(pud)) #define pud_user(pud) pte_user(pud_pte(pud)) #define pud_user_exec(pud) pte_user_exec(pud_pte(pud)) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 0f0e10bb0a95..1234bbaef5bf 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -81,16 +81,12 @@ bool arch_hugetlb_migration_supported(struct hstate *h) int pmd_huge(pmd_t pmd) { - return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT); + return pmd_leaf(pmd); } int pud_huge(pud_t pud) { -#ifndef __PAGETABLE_PMD_FOLDED - return pud_val(pud) && !(pud_val(pud) & PUD_TABLE_BIT); -#else - return 0; -#endif + return pud_leaf(pud); } static int find_num_contig(struct mm_struct *mm, unsigned long addr, -- 2.44.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel