From patchwork Wed Feb 15 00:04:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matthew Wilcox (Oracle)" X-Patchwork-Id: 13141060 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BEC11C05027 for ; Wed, 15 Feb 2023 00:06:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=YNJrDcaYbIyJpIvlPrPwAjfy0eXtnLckunOFCODF6vc=; b=TOJ2DQiTP9TegR /0uHoMfaYkFBHMnqNXuUOR2+Yx0BWb6B1KJN3ApxViyLxmAPJj6uesMpFYJZgFvq/AVaoY7IyStu1 ZD1yaHKikgwn6oS/uvHAGunRcxz/Cz7IdOcUkf0MZRdPvaMdbB3gRsOopwt2iR4y88DCLhRqpzAdt ez2CT2EL3rGOA3YSlOLP82apeOIY49UEA5JcbAyDKNZ0mmLqCXIv1jYaQq4H9hHmBr2OptQ4pUIj3 EBBzQ9DKb7gdfuIqkSFSL0mvngfzd1Wyv116IJ5YM3mlaaqWqSySSXzpmC12KCj+RamPqZSO3wVW1 GTXSbRo5h7pyxrVt2Ehg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pS5IO-0040Nu-A4; Wed, 15 Feb 2023 00:05:12 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pS5IM-0040NK-V5 for linux-arm-kernel@bombadil.infradead.org; Wed, 15 Feb 2023 00:05:10 +0000 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=s+L17RxfXCQ5HVPYV7rNHXw7afhlVPPZ+bFT60n+KTA=; b=SEG1Q+pPQu2QJMOI6kaTv2LQv1 NVAh09QWWSuOAlT5w2SJ/qY2l17fJJ0+WBL79k7sGJLB2eEvwaqf0DNBgmZMqSYOI21T60nNZuc0B 5dgQ4SJCAQqGZeORfpiPMhqD5/0Ft81JdOy94qCQ8Hv8a2TWikCWigrwSCPhKmnmhV4OtJXJf6FUz wYCEKu/O4esYVzZxSG199TLSwoGqDjXJZeCiqX+jsHIZLaS7zyUF9XR5YrPGjtZEwPGOKfGutx3bH 1uGBJh5rnOvcNzNjsTAz973YyMOMsoJunKCB9ELpfYlgdRzy8UUoVZonGZh5peN82C0D5ubno8Fpr AImeRKTg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pS5II-006wkY-AK; Wed, 15 Feb 2023 00:05:06 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, Catalin Marinas , Will Deacon , linux-arch@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" Subject: [PATCH 9/7] arm64: Implement the new page table range API Date: Wed, 15 Feb 2023 00:04:42 +0000 Message-Id: <20230215000446.1655635-1-willy@infradead.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230211033948.891959-1-willy@infradead.org> References: <20230211033948.891959-1-willy@infradead.org> MIME-Version: 1.0 X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add set_ptes(), update_mmu_cache_range() and flush_dcache_folio(). The PG_dcache_clear flag changes from being a per-page bit to being a per-folio bit. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Catalin Marinas --- arch/arm64/include/asm/cacheflush.h | 4 +++- arch/arm64/include/asm/pgtable.h | 25 ++++++++++++++------ arch/arm64/mm/flush.c | 36 +++++++++++------------------ 3 files changed, 35 insertions(+), 30 deletions(-) diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index 37185e978aeb..d115451ed263 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -114,7 +114,7 @@ extern void copy_to_user_page(struct vm_area_struct *, struct page *, #define copy_to_user_page copy_to_user_page /* - * flush_dcache_page is used when the kernel has written to the page + * flush_dcache_folio is used when the kernel has written to the page * cache page at virtual address page->virtual. * * If this page isn't mapped (ie, page_mapping == NULL), or it might @@ -127,6 +127,8 @@ extern void copy_to_user_page(struct vm_area_struct *, struct page *, */ #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 extern void flush_dcache_page(struct page *); +void flush_dcache_folio(struct folio *); +#define flush_dcache_folio flush_dcache_folio static __always_inline void icache_inval_all_pou(void) { diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 69765dc697af..4d1b79dbff16 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -355,12 +355,21 @@ static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr, set_pte(ptep, pte); } -static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pte) -{ - page_table_check_ptes_set(mm, addr, ptep, pte, 1); - return __set_pte_at(mm, addr, ptep, pte); +static inline void set_ptes(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte, unsigned int nr) +{ + page_table_check_ptes_set(mm, addr, ptep, pte, nr); + + for (;;) { + __set_pte_at(mm, addr, ptep, pte); + if (--nr == 0) + break; + ptep++; + addr += PAGE_SIZE; + pte_val(pte) += PAGE_SIZE; + } } +#define set_pte_at(mm, addr, ptep, pte) set_ptes(mm, addr, ptep, pte, 1) /* * Huge pte definitions. @@ -1059,8 +1068,8 @@ static inline void arch_swap_restore(swp_entry_t entry, struct folio *folio) /* * On AArch64, the cache coherency is handled via the set_pte_at() function. */ -static inline void update_mmu_cache(struct vm_area_struct *vma, - unsigned long addr, pte_t *ptep) +static inline void update_mmu_cache_range(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep, unsigned int nr) { /* * We don't do anything here, so there's a very small chance of @@ -1069,6 +1078,8 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, */ } +#define update_mmu_cache(vma, addr, ptep) \ + update_mmu_cache_range(vma, addr, ptep, 1) #define update_mmu_cache_pmd(vma, address, pmd) do { } while (0) #ifdef CONFIG_ARM64_PA_BITS_52 diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c index 5f9379b3c8c8..deb781af0a3a 100644 --- a/arch/arm64/mm/flush.c +++ b/arch/arm64/mm/flush.c @@ -50,20 +50,13 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page, void __sync_icache_dcache(pte_t pte) { - struct page *page = pte_page(pte); + struct folio *folio = page_folio(pte_page(pte)); - /* - * HugeTLB pages are always fully mapped, so only setting head page's - * PG_dcache_clean flag is enough. - */ - if (PageHuge(page)) - page = compound_head(page); - - if (!test_bit(PG_dcache_clean, &page->flags)) { - sync_icache_aliases((unsigned long)page_address(page), - (unsigned long)page_address(page) + - page_size(page)); - set_bit(PG_dcache_clean, &page->flags); + if (!test_bit(PG_dcache_clean, &folio->flags)) { + sync_icache_aliases((unsigned long)folio_address(folio), + (unsigned long)folio_address(folio) + + folio_size(folio)); + set_bit(PG_dcache_clean, &folio->flags); } } EXPORT_SYMBOL_GPL(__sync_icache_dcache); @@ -73,17 +66,16 @@ EXPORT_SYMBOL_GPL(__sync_icache_dcache); * it as dirty for later flushing when mapped in user space (if executable, * see __sync_icache_dcache). */ -void flush_dcache_page(struct page *page) +void flush_dcache_folio(struct folio *folio) { - /* - * HugeTLB pages are always fully mapped and only head page will be - * set PG_dcache_clean (see comments in __sync_icache_dcache()). - */ - if (PageHuge(page)) - page = compound_head(page); + if (test_bit(PG_dcache_clean, &folio->flags)) + clear_bit(PG_dcache_clean, &folio->flags); +} +EXPORT_SYMBOL(flush_dcache_folio); - if (test_bit(PG_dcache_clean, &page->flags)) - clear_bit(PG_dcache_clean, &page->flags); +void flush_dcache_page(struct page *page) +{ + flush_dcache_folio(page_folio(page)); } EXPORT_SYMBOL(flush_dcache_page);