From nobody Mon Feb 9 17:21:59 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 89ECEC001B0 for ; Thu, 13 Jul 2023 09:41:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234382AbjGMJlA (ORCPT ); Thu, 13 Jul 2023 05:41:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58872 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234178AbjGMJkd (ORCPT ); Thu, 13 Jul 2023 05:40:33 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 27F3F211C; Thu, 13 Jul 2023 02:40:32 -0700 (PDT) Received: from dggpemm500001.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4R1qLq3yDQzVjXt; Thu, 13 Jul 2023 17:39:15 +0800 (CST) Received: from localhost.localdomain.localdomain (10.175.113.25) by dggpemm500001.china.huawei.com (7.185.36.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Thu, 13 Jul 2023 17:40:28 +0800 From: Kefeng Wang To: , Andrew Morton , CC: Russell King , Catalin Marinas , Will Deacon , Huacai Chen , WANG Xuerui , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , , , , , , , , Kefeng Wang Subject: [PATCH rfc -next 06/10] riscv: mm: use try_vma_locked_page_fault() Date: Thu, 13 Jul 2023 17:53:34 +0800 Message-ID: <20230713095339.189715-7-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230713095339.189715-1-wangkefeng.wang@huawei.com> References: <20230713095339.189715-1-wangkefeng.wang@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.175.113.25] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpemm500001.china.huawei.com (7.185.36.107) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Use new try_vma_locked_page_fault() helper to simplify code. No functional change intended. Signed-off-by: Kefeng Wang --- arch/riscv/mm/fault.c | 38 +++++++++++++++----------------------- 1 file changed, 15 insertions(+), 23 deletions(-) diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c index 6ea2cce4cc17..13bc60370b5c 100644 --- a/arch/riscv/mm/fault.c +++ b/arch/riscv/mm/fault.c @@ -215,6 +215,16 @@ static inline bool access_error(unsigned long cause, s= truct vm_area_struct *vma) return false; } =20 +#ifdef CONFIG_PER_VMA_LOCK +int arch_vma_check_access(struct vm_area_struct *vma, + struct vm_locked_fault *vmlf) +{ + if (unlikely(access_error(vmlf->fault_code, vma))) + return -EINVAL; + return 0; +} +#endif + /* * This routine handles page faults. It determines the address and the * problem, and then passes it off to one of the appropriate routines. @@ -228,6 +238,7 @@ void handle_page_fault(struct pt_regs *regs) unsigned int flags =3D FAULT_FLAG_DEFAULT; int code =3D SEGV_MAPERR; vm_fault_t fault; + struct vm_locked_fault vmlf; =20 cause =3D regs->cause; addr =3D regs->badaddr; @@ -283,35 +294,18 @@ void handle_page_fault(struct pt_regs *regs) flags |=3D FAULT_FLAG_WRITE; else if (cause =3D=3D EXC_INST_PAGE_FAULT) flags |=3D FAULT_FLAG_INSTRUCTION; -#ifdef CONFIG_PER_VMA_LOCK - if (!(flags & FAULT_FLAG_USER)) - goto lock_mmap; =20 - vma =3D lock_vma_under_rcu(mm, addr); - if (!vma) - goto lock_mmap; - - if (unlikely(access_error(cause, vma))) { - vma_end_read(vma); - goto lock_mmap; - } - - fault =3D handle_mm_fault(vma, addr, flags | FAULT_FLAG_VMA_LOCK, regs); - vma_end_read(vma); - - if (!(fault & VM_FAULT_RETRY)) { - count_vm_vma_lock_event(VMA_LOCK_SUCCESS); + VM_LOCKED_FAULT_INIT(vmlf, mm, addr, flags, 0, regs, cause); + if (try_vma_locked_page_fault(&vmlf, &fault)) + goto retry; + else if (!(fault | VM_FAULT_RETRY)) goto done; - } - count_vm_vma_lock_event(VMA_LOCK_RETRY); =20 if (fault_signal_pending(fault, regs)) { if (!user_mode(regs)) no_context(regs, addr); return; } -lock_mmap: -#endif /* CONFIG_PER_VMA_LOCK */ =20 retry: vma =3D lock_mm_and_find_vma(mm, addr, regs); @@ -368,9 +362,7 @@ void handle_page_fault(struct pt_regs *regs) =20 mmap_read_unlock(mm); =20 -#ifdef CONFIG_PER_VMA_LOCK done: -#endif if (unlikely(fault & VM_FAULT_ERROR)) { tsk->thread.bad_cause =3D cause; mm_fault_error(regs, addr, fault); --=20 2.27.0