From nobody Wed Feb 11 13:20:04 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 2EA3DC7618D for ; Wed, 15 Mar 2023 05:15:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231501AbjCOFPn (ORCPT ); Wed, 15 Mar 2023 01:15:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48572 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230365AbjCOFPG (ORCPT ); Wed, 15 Mar 2023 01:15:06 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D67B725B83; Tue, 14 Mar 2023 22:14:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=sytJt4ZH2ciYaUZJ2jrdqraRlIjKW/6JOZO8w6mCnuM=; b=dOAYiOpB9wvXMhkb4HRsxV4/DU VD4tWO/q9akt/zqW7pniC0O7hOsmpS4ix4eFov1LLKCvqssoGT3xt9onK0+UryXSFFMGoHXyfhMcZ 9/+qHxc+i66HQ5B3Xf0SLne2+NDKjiTViiw0wWQhC2HHtrJMRkDp2ozr729FoKOzQ7SPDOA1xTghw aRUCpIYMIF4kj32L+n9i2dDDXkeRTYPoJZOCu3P1iSYpYtHOHPrVScZaiYU4wssnNwuPPCmWa8Mb2 kYs5tf3trPVVgFVT1bK/bZPiNWNMDi2Aw8selj2F2iCsihbbks8SWrvbySHRkVwofWjgHRPjMiaOg EAnSYmIw==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pcJTL-00DYBg-SS; Wed, 15 Mar 2023 05:14:47 +0000 From: "Matthew Wilcox (Oracle)" To: linux-arch@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Huacai Chen , WANG Xuerui , loongarch@lists.linux.dev Subject: [PATCH v4 13/36] loongarch: Implement the new page table range API Date: Wed, 15 Mar 2023 05:14:21 +0000 Message-Id: <20230315051444.3229621-14-willy@infradead.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230315051444.3229621-1-willy@infradead.org> References: <20230315051444.3229621-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add update_mmu_cache_range() and change _PFN_SHIFT to PFN_PTE_SHIFT. It would probably be more efficient to implement __update_tlb() by flushing the entire folio instead of calling __update_tlb() N times, but I'll leave that for someone who understands the architecture better. Signed-off-by: Matthew Wilcox (Oracle) Cc: Huacai Chen Cc: WANG Xuerui Cc: loongarch@lists.linux.dev Acked-by: Mike Rapoport (IBM) --- arch/loongarch/include/asm/cacheflush.h | 2 ++ arch/loongarch/include/asm/pgtable-bits.h | 4 ++-- arch/loongarch/include/asm/pgtable.h | 28 ++++++++++++----------- arch/loongarch/mm/pgtable.c | 2 +- arch/loongarch/mm/tlb.c | 2 +- 5 files changed, 21 insertions(+), 17 deletions(-) diff --git a/arch/loongarch/include/asm/cacheflush.h b/arch/loongarch/inclu= de/asm/cacheflush.h index 0681788eb474..7907eb42bfbd 100644 --- a/arch/loongarch/include/asm/cacheflush.h +++ b/arch/loongarch/include/asm/cacheflush.h @@ -47,8 +47,10 @@ void local_flush_icache_range(unsigned long start, unsig= ned long end); #define flush_cache_vmap(start, end) do { } while (0) #define flush_cache_vunmap(start, end) do { } while (0) #define flush_icache_page(vma, page) do { } while (0) +#define flush_icache_pages(vma, page) do { } while (0) #define flush_icache_user_page(vma, page, addr, len) do { } while (0) #define flush_dcache_page(page) do { } while (0) +#define flush_dcache_folio(folio) do { } while (0) #define flush_dcache_mmap_lock(mapping) do { } while (0) #define flush_dcache_mmap_unlock(mapping) do { } while (0) =20 diff --git a/arch/loongarch/include/asm/pgtable-bits.h b/arch/loongarch/inc= lude/asm/pgtable-bits.h index 8b98d22a145b..a1eb2e25446b 100644 --- a/arch/loongarch/include/asm/pgtable-bits.h +++ b/arch/loongarch/include/asm/pgtable-bits.h @@ -48,12 +48,12 @@ #define _PAGE_NO_EXEC (_ULCAST_(1) << _PAGE_NO_EXEC_SHIFT) #define _PAGE_RPLV (_ULCAST_(1) << _PAGE_RPLV_SHIFT) #define _CACHE_MASK (_ULCAST_(3) << _CACHE_SHIFT) -#define _PFN_SHIFT (PAGE_SHIFT - 12 + _PAGE_PFN_SHIFT) +#define PFN_PTE_SHIFT (PAGE_SHIFT - 12 + _PAGE_PFN_SHIFT) =20 #define _PAGE_USER (PLV_USER << _PAGE_PLV_SHIFT) #define _PAGE_KERN (PLV_KERN << _PAGE_PLV_SHIFT) =20 -#define _PFN_MASK (~((_ULCAST_(1) << (_PFN_SHIFT)) - 1) & \ +#define _PFN_MASK (~((_ULCAST_(1) << (PFN_PTE_SHIFT)) - 1) & \ ((_ULCAST_(1) << (_PAGE_PFN_END_SHIFT)) - 1)) =20 /* diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/= asm/pgtable.h index d28fb9dbec59..13aad0003e9a 100644 --- a/arch/loongarch/include/asm/pgtable.h +++ b/arch/loongarch/include/asm/pgtable.h @@ -237,9 +237,9 @@ extern pmd_t mk_pmd(struct page *page, pgprot_t prot); extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pm= dp, pmd_t pmd); =20 #define pte_page(x) pfn_to_page(pte_pfn(x)) -#define pte_pfn(x) ((unsigned long)(((x).pte & _PFN_MASK) >> _PFN_SHIFT)) -#define pfn_pte(pfn, prot) __pte(((pfn) << _PFN_SHIFT) | pgprot_val(prot)) -#define pfn_pmd(pfn, prot) __pmd(((pfn) << _PFN_SHIFT) | pgprot_val(prot)) +#define pte_pfn(x) ((unsigned long)(((x).pte & _PFN_MASK) >> PFN_PTE_SHIF= T)) +#define pfn_pte(pfn, prot) __pte(((pfn) << PFN_PTE_SHIFT) | pgprot_val(pro= t)) +#define pfn_pmd(pfn, prot) __pmd(((pfn) << PFN_PTE_SHIFT) | pgprot_val(pro= t)) =20 /* * Initialize a new pgd / pud / pmd table with invalid pointers. @@ -334,12 +334,6 @@ static inline void set_pte(pte_t *ptep, pte_t pteval) } } =20 -static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pteval) -{ - set_pte(ptep, pteval); -} - static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte= _t *ptep) { /* Preserve global status for the pair */ @@ -445,11 +439,19 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t ne= wprot) extern void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t *ptep); =20 -static inline void update_mmu_cache(struct vm_area_struct *vma, - unsigned long address, pte_t *ptep) +static inline void update_mmu_cache_range(struct vm_area_struct *vma, + unsigned long address, pte_t *ptep, unsigned int nr) { - __update_tlb(vma, address, ptep); + for (;;) { + __update_tlb(vma, address, ptep); + if (--nr =3D=3D 0) + break; + address +=3D PAGE_SIZE; + ptep++; + } } +#define update_mmu_cache(vma, addr, ptep) \ + update_mmu_cache_range(vma, addr, ptep, 1) =20 #define __HAVE_ARCH_UPDATE_MMU_TLB #define update_mmu_tlb update_mmu_cache @@ -462,7 +464,7 @@ static inline void update_mmu_cache_pmd(struct vm_area_= struct *vma, =20 static inline unsigned long pmd_pfn(pmd_t pmd) { - return (pmd_val(pmd) & _PFN_MASK) >> _PFN_SHIFT; + return (pmd_val(pmd) & _PFN_MASK) >> PFN_PTE_SHIFT; } =20 #ifdef CONFIG_TRANSPARENT_HUGEPAGE diff --git a/arch/loongarch/mm/pgtable.c b/arch/loongarch/mm/pgtable.c index 36a6dc0148ae..1260cf30e3ee 100644 --- a/arch/loongarch/mm/pgtable.c +++ b/arch/loongarch/mm/pgtable.c @@ -107,7 +107,7 @@ pmd_t mk_pmd(struct page *page, pgprot_t prot) { pmd_t pmd; =20 - pmd_val(pmd) =3D (page_to_pfn(page) << _PFN_SHIFT) | pgprot_val(prot); + pmd_val(pmd) =3D (page_to_pfn(page) << PFN_PTE_SHIFT) | pgprot_val(prot); =20 return pmd; } diff --git a/arch/loongarch/mm/tlb.c b/arch/loongarch/mm/tlb.c index 8bad6b0cff59..73652930b268 100644 --- a/arch/loongarch/mm/tlb.c +++ b/arch/loongarch/mm/tlb.c @@ -246,7 +246,7 @@ static void output_pgtable_bits_defines(void) pr_define("_PAGE_WRITE_SHIFT %d\n", _PAGE_WRITE_SHIFT); pr_define("_PAGE_NO_READ_SHIFT %d\n", _PAGE_NO_READ_SHIFT); pr_define("_PAGE_NO_EXEC_SHIFT %d\n", _PAGE_NO_EXEC_SHIFT); - pr_define("_PFN_SHIFT %d\n", _PFN_SHIFT); + pr_define("PFN_PTE_SHIFT %d\n", PFN_PTE_SHIFT); pr_debug("\n"); } =20 --=20 2.39.2