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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 77E4EC43331 for ; Fri, 3 Apr 2020 09:01:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5392B2080C for ; Fri, 3 Apr 2020 09:01:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390630AbgDCJBb (ORCPT ); Fri, 3 Apr 2020 05:01:31 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:49358 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2390595AbgDCJB3 (ORCPT ); Fri, 3 Apr 2020 05:01:29 -0400 Received: from DGGEMS404-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id E6FA519880F97011DEC2; Fri, 3 Apr 2020 17:01:11 +0800 (CST) Received: from DESKTOP-KKJBAGG.china.huawei.com (10.173.220.25) by DGGEMS404-HUB.china.huawei.com (10.3.19.204) with Microsoft SMTP Server id 14.3.487.0; Fri, 3 Apr 2020 17:01:05 +0800 From: Zhenyu Ye To: , , , , , , , , , , , , , , , , CC: , , , , , , , , , Subject: [PATCH v1 5/6] mm: tlb: Provide flush_*_tlb_range wrappers Date: Fri, 3 Apr 2020 17:00:47 +0800 Message-ID: <20200403090048.938-6-yezhenyu2@huawei.com> X-Mailer: git-send-email 2.22.0.windows.1 In-Reply-To: <20200403090048.938-1-yezhenyu2@huawei.com> References: <20200403090048.938-1-yezhenyu2@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.173.220.25] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch provides flush_{pte|pmd|pud|p4d}_tlb_range() in generic code, which are expressed through the mmu_gather APIs. These interface set tlb->cleared_* and finally call tlb_flush(), so we can do the tlb invalidation according to the information in struct mmu_gather. Signed-off-by: Zhenyu Ye --- include/asm-generic/pgtable.h | 12 +++++++-- mm/pgtable-generic.c | 50 +++++++++++++++++++++++++++++++++++ 2 files changed, 60 insertions(+), 2 deletions(-) diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index e2e2bef07dd2..2bedeee94131 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1160,11 +1160,19 @@ static inline int pmd_free_pte_page(pmd_t *pmd, unsigned long addr) * invalidate the entire TLB which is not desitable. * e.g. see arch/arc: flush_pmd_tlb_range */ -#define flush_pmd_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) -#define flush_pud_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) +extern void flush_pte_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end); +extern void flush_pmd_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end); +extern void flush_pud_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end); +extern void flush_p4d_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end); #else +#define flush_pte_tlb_range(vma, addr, end) BUILD_BUG() #define flush_pmd_tlb_range(vma, addr, end) BUILD_BUG() #define flush_pud_tlb_range(vma, addr, end) BUILD_BUG() +#define flush_p4d_tlb_range(vma, addr, end) BUILD_BUG() #endif #endif diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c index 3d7c01e76efc..0f5414a4a2ec 100644 --- a/mm/pgtable-generic.c +++ b/mm/pgtable-generic.c @@ -101,6 +101,56 @@ pte_t ptep_clear_flush(struct vm_area_struct *vma, unsigned long address, #ifdef CONFIG_TRANSPARENT_HUGEPAGE +#ifndef __HAVE_ARCH_FLUSH_PMD_TLB_RANGE +void flush_pte_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end) +{ + struct mmu_gather tlb; + + tlb_gather_mmu(&tlb, vma->vm_mm, addr, end); + tlb_start_vma(&tlb, vma); + tlb_set_pte_range(&tlb, addr, end - addr); + tlb_end_vma(&tlb, vma); + tlb_finish_mmu(&tlb, addr, end); +} + +void flush_pmd_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end) +{ + struct mmu_gather tlb; + + tlb_gather_mmu(&tlb, vma->vm_mm, addr, end); + tlb_start_vma(&tlb, vma); + tlb_set_pmd_range(&tlb, addr, end - addr); + tlb_end_vma(&tlb, vma); + tlb_finish_mmu(&tlb, addr, end); +} + +void flush_pud_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end) +{ + struct mmu_gather tlb; + + tlb_gather_mmu(&tlb, vma->vm_mm, addr, end); + tlb_start_vma(&tlb, vma); + tlb_set_pud_range(&tlb, addr, end - addr); + tlb_end_vma(&tlb, vma); + tlb_finish_mmu(&tlb, addr, end); +} + +void flush_p4d_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end) +{ + struct mmu_gather tlb; + + tlb_gather_mmu(&tlb, vma->vm_mm, addr, end); + tlb_start_vma(&tlb, vma); + tlb_set_p4d_range(&tlb, addr, end - addr); + tlb_end_vma(&tlb, vma); + tlb_finish_mmu(&tlb, addr, end); +} +#endif /* __HAVE_ARCH_FLUSH_PMD_TLB_RANGE */ + #ifndef __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS int pmdp_set_access_flags(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp, -- 2.19.1