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[2607:7c80:54:e::133]) by mx.google.com with ESMTPS id n10si15454869pgd.57.2019.02.19.02.32.56 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 19 Feb 2019 02:32:56 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of peterz@infradead.org designates 2607:7c80:54:e::133 as permitted sender) client-ip=2607:7c80:54:e::133; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20170209 header.b=K8MTrczw; spf=pass (google.com: best guess record for domain of peterz@infradead.org designates 2607:7c80:54:e::133 as permitted sender) smtp.mailfrom=peterz@infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-Id:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Qgx3kgv+AkSn1Y+HQ6cCIZsGaoQ/+n1Kc3v/8+oaveQ=; b=K8MTrczwuDeiPR67LXHwzw7mnw C8u4rtwpVXJtSiXDRRyOmN31uswGLWKM3Omb47jTJCx1tn2h2p8mLuaM4fiJxn0//VYKS8/ugH/Xi guqkV1RkjbpdcXeL+Px9hrzfLyafAr274HEt0+MFlJXQ737JQ6vcCqXYc1FqyhN/A8VaXgapGVUpJ f3YkDSyip+zhSl5w8n1oxDMDq84SU0m74yGYVtcuUTEMZVxSVTkyfIzfErV2pVgDduZEBc6/Z7BjN 9EMSszlzX9IYda0/znC38dMO01Zu8pDqYMN/r1B81cSUh7xYf2WN42PIUfX/i7kVdYU78+ZAKdR/a tBNrv7DQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gw2ho-0006ZU-Md; Tue, 19 Feb 2019 10:32:52 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 6B1BC2852059E; Tue, 19 Feb 2019 11:32:48 +0100 (CET) Message-Id: <20190219103233.502111627@infradead.org> User-Agent: quilt/0.65 Date: Tue, 19 Feb 2019 11:31:59 +0100 From: Peter Zijlstra To: will.deacon@arm.com, aneesh.kumar@linux.vnet.ibm.com, akpm@linux-foundation.org, npiggin@gmail.com Cc: linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, peterz@infradead.org, linux@armlinux.org.uk, heiko.carstens@de.ibm.com, riel@surriel.com, Richard Weinberger Subject: [PATCH v6 11/18] um/tlb: Convert to generic mmu_gather References: <20190219103148.192029670@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Generic mmu_gather provides the simple flush_tlb_range() based range tracking mmu_gather UM needs. Cc: Will Deacon Cc: "Aneesh Kumar K.V" Cc: Andrew Morton Cc: Nick Piggin Cc: Richard Weinberger Signed-off-by: Peter Zijlstra (Intel) --- arch/um/include/asm/tlb.h | 156 ---------------------------------------------- 1 file changed, 2 insertions(+), 154 deletions(-) --- a/arch/um/include/asm/tlb.h +++ b/arch/um/include/asm/tlb.h @@ -2,160 +2,8 @@ #ifndef __UM_TLB_H #define __UM_TLB_H -#include -#include -#include -#include #include - -#define tlb_start_vma(tlb, vma) do { } while (0) -#define tlb_end_vma(tlb, vma) do { } while (0) -#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm) - -/* struct mmu_gather is an opaque type used by the mm code for passing around - * any data needed by arch specific code for tlb_remove_page. - */ -struct mmu_gather { - struct mm_struct *mm; - unsigned int need_flush; /* Really unmapped some ptes? */ - unsigned long start; - unsigned long end; - unsigned int fullmm; /* non-zero means full mm flush */ -}; - -static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, - unsigned long address) -{ - if (tlb->start > address) - tlb->start = address; - if (tlb->end < address + PAGE_SIZE) - tlb->end = address + PAGE_SIZE; -} - -static inline void init_tlb_gather(struct mmu_gather *tlb) -{ - tlb->need_flush = 0; - - tlb->start = TASK_SIZE; - tlb->end = 0; - - if (tlb->fullmm) { - tlb->start = 0; - tlb->end = TASK_SIZE; - } -} - -static inline void -arch_tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, - unsigned long start, unsigned long end) -{ - tlb->mm = mm; - tlb->start = start; - tlb->end = end; - tlb->fullmm = !(start | (end+1)); - - init_tlb_gather(tlb); -} - -extern void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, - unsigned long end); - -static inline void -tlb_flush_mmu_tlbonly(struct mmu_gather *tlb) -{ - flush_tlb_mm_range(tlb->mm, tlb->start, tlb->end); -} - -static inline void -tlb_flush_mmu_free(struct mmu_gather *tlb) -{ - init_tlb_gather(tlb); -} - -static inline void -tlb_flush_mmu(struct mmu_gather *tlb) -{ - if (!tlb->need_flush) - return; - - tlb_flush_mmu_tlbonly(tlb); - tlb_flush_mmu_free(tlb); -} - -/* arch_tlb_finish_mmu - * Called at the end of the shootdown operation to free up any resources - * that were required. - */ -static inline void -arch_tlb_finish_mmu(struct mmu_gather *tlb, - unsigned long start, unsigned long end, bool force) -{ - if (force) { - tlb->start = start; - tlb->end = end; - tlb->need_flush = 1; - } - tlb_flush_mmu(tlb); - - /* keep the page table cache within bounds */ - check_pgt_cache(); -} - -/* tlb_remove_page - * Must perform the equivalent to __free_pte(pte_get_and_clear(ptep)), - * while handling the additional races in SMP caused by other CPUs - * caching valid mappings in their TLBs. - */ -static inline int __tlb_remove_page(struct mmu_gather *tlb, struct page *page) -{ - tlb->need_flush = 1; - free_page_and_swap_cache(page); - return false; /* avoid calling tlb_flush_mmu */ -} - -static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page) -{ - __tlb_remove_page(tlb, page); -} - -static inline bool __tlb_remove_page_size(struct mmu_gather *tlb, - struct page *page, int page_size) -{ - return __tlb_remove_page(tlb, page); -} - -static inline void tlb_remove_page_size(struct mmu_gather *tlb, - struct page *page, int page_size) -{ - return tlb_remove_page(tlb, page); -} - -/** - * tlb_remove_tlb_entry - remember a pte unmapping for later tlb invalidation. - * - * Record the fact that pte's were really umapped in ->need_flush, so we can - * later optimise away the tlb invalidate. This helps when userspace is - * unmapping already-unmapped pages, which happens quite a lot. - */ -#define tlb_remove_tlb_entry(tlb, ptep, address) \ - do { \ - tlb->need_flush = 1; \ - __tlb_remove_tlb_entry(tlb, ptep, address); \ - } while (0) - -#define tlb_remove_huge_tlb_entry(h, tlb, ptep, address) \ - tlb_remove_tlb_entry(tlb, ptep, address) - -static inline void tlb_change_page_size(struct mmu_gather *tlb, unsigned int page_size) -{ -} - -#define pte_free_tlb(tlb, ptep, addr) __pte_free_tlb(tlb, ptep, addr) - -#define pud_free_tlb(tlb, pudp, addr) __pud_free_tlb(tlb, pudp, addr) - -#define pmd_free_tlb(tlb, pmdp, addr) __pmd_free_tlb(tlb, pmdp, addr) - -#define tlb_migrate_finish(mm) do {} while (0) +#include +#include #endif