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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 61400C04FF3 for ; Mon, 24 May 2021 09:05:57 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id E3B9160698 for ; Mon, 24 May 2021 09:05:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E3B9160698 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4FpWXM4bnZz3btv for ; Mon, 24 May 2021 19:05:55 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=Cf+9shSs; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=aneesh.kumar@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=Cf+9shSs; dkim-atps=neutral Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4FpWS94PjXz303P for ; Mon, 24 May 2021 19:02:17 +1000 (AEST) Received: from pps.filterd (m0187473.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 14O8vKQh024243; Mon, 24 May 2021 05:02:03 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=ZPu+qBxNUQb6qoLZLtpjr0OAy5taxcPD6ALEvY6qpSY=; b=Cf+9shSsAWf8ukhN9goqxZpxZYdwN/amh0ipcBU46/1fczdDborNwDhW4wkSOeLXsfWh LvdPnjCTv7IqLFx7eNbrEnqmqkF92aHO0HS6jgScfSK01i90xR90cdw6c8yROIQ9KoFz aHrTABSeCvPK77PlmABH4U92erS/5OahRWZTGjuTq5n3Np3gBzZO0x1CqUStO3/I3Ijk wMV3vRjfhE2f6AHSjk6XbW/ITUkJdIvgjKqonsVyMMED527DflcP0sAr4oYHP3kbxMlj g71+qToxbWGF/AEyYtCJ7YhsLRzJvJ1iLms/MljXzzLbXRbrCRUUUOQqyCKzFnLpowiw gQ== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 38r938042a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 May 2021 05:02:03 -0400 Received: from m0187473.ppops.net (m0187473.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 14O8v8sG023716; Mon, 24 May 2021 05:02:02 -0400 Received: from ppma02wdc.us.ibm.com (aa.5b.37a9.ip4.static.sl-reverse.com [169.55.91.170]) by mx0a-001b2d01.pphosted.com with ESMTP id 38r938041m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 May 2021 05:02:02 -0400 Received: from pps.filterd (ppma02wdc.us.ibm.com [127.0.0.1]) by ppma02wdc.us.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 14O8nTeH024105; Mon, 24 May 2021 09:02:01 GMT Received: from b01cxnp22035.gho.pok.ibm.com (b01cxnp22035.gho.pok.ibm.com [9.57.198.25]) by ppma02wdc.us.ibm.com with ESMTP id 38psk95s88-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 May 2021 09:02:01 +0000 Received: from b01ledav005.gho.pok.ibm.com (b01ledav005.gho.pok.ibm.com [9.57.199.110]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 14O921f532375294 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 24 May 2021 09:02:01 GMT Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 102CCAE067; Mon, 24 May 2021 09:02:01 +0000 (GMT) Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6774BAE05F; Mon, 24 May 2021 09:01:58 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.102.1.240]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP; Mon, 24 May 2021 09:01:58 +0000 (GMT) From: "Aneesh Kumar K.V" To: linux-mm@kvack.org, akpm@linux-foundation.org Subject: [PATCH v6 10/11] mm/mremap: Allow arch runtime override Date: Mon, 24 May 2021 14:31:13 +0530 Message-Id: <20210524090114.63446-11-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210524090114.63446-1-aneesh.kumar@linux.ibm.com> References: <20210524090114.63446-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 8ERsog0o-QmmzeAyj-yBH6foSBQw2sFU X-Proofpoint-ORIG-GUID: lhmUKMoet1YmTaxNR7NNAD19GSJTBXLg X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.761 definitions=2021-05-24_04:2021-05-20, 2021-05-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 suspectscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 mlxscore=0 priorityscore=1501 mlxlogscore=999 impostorscore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2105240067 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: "Aneesh Kumar K.V" , Linus Torvalds , npiggin@gmail.com, kaleshsingh@google.com, joel@joelfernandes.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Architectures like ppc64 support faster mremap only with radix translation. Hence allow a runtime check w.r.t support for fast mremap. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/include/asm/tlb.h | 6 ++++++ mm/mremap.c | 15 ++++++++++++++- 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/asm/tlb.h index 160422a439aa..09a9ae5f3656 100644 --- a/arch/powerpc/include/asm/tlb.h +++ b/arch/powerpc/include/asm/tlb.h @@ -83,5 +83,11 @@ static inline int mm_is_thread_local(struct mm_struct *mm) } #endif +#define arch_supports_page_table_move arch_supports_page_table_move +static inline bool arch_supports_page_table_move(void) +{ + return radix_enabled(); +} + #endif /* __KERNEL__ */ #endif /* __ASM_POWERPC_TLB_H */ diff --git a/mm/mremap.c b/mm/mremap.c index e70b8e3b9568..42485d19c490 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -25,7 +25,7 @@ #include #include -#include +#include #include #include "internal.h" @@ -220,6 +220,15 @@ static inline void flush_pte_tlb_pwc_range(struct vm_area_struct *vma, } #endif +#ifndef arch_supports_page_table_move +#define arch_supports_page_table_move arch_supports_page_table_move +static inline bool arch_supports_page_table_move(void) +{ + return IS_ENABLED(CONFIG_HAVE_MOVE_PMD) || + IS_ENABLED(CONFIG_HAVE_MOVE_PUD); +} +#endif + #ifdef CONFIG_HAVE_MOVE_PMD static bool move_normal_pmd(struct vm_area_struct *vma, unsigned long old_addr, unsigned long new_addr, pmd_t *old_pmd, pmd_t *new_pmd) @@ -228,6 +237,8 @@ static bool move_normal_pmd(struct vm_area_struct *vma, unsigned long old_addr, struct mm_struct *mm = vma->vm_mm; pmd_t pmd; + if (!arch_supports_page_table_move()) + return false; /* * The destination pmd shouldn't be established, free_pgtables() * should have released it. @@ -318,6 +329,8 @@ static bool move_normal_pud(struct vm_area_struct *vma, unsigned long old_addr, if (USE_SPLIT_PTE_PTLOCKS) return false; + if (!arch_supports_page_table_move()) + return false; /* * The destination pud shouldn't be established, free_pgtables() * should have released it. -- 2.31.1