From patchwork Thu May 13 18:47:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 439163 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=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 92813C43462 for ; Thu, 13 May 2021 18:48:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 679BA61421 for ; Thu, 13 May 2021 18:48:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231761AbhEMStg (ORCPT ); Thu, 13 May 2021 14:49:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:41578 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231687AbhEMStf (ORCPT ); Thu, 13 May 2021 14:49:35 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BDE9461408; Thu, 13 May 2021 18:48:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620931705; bh=mAlx5j7NL9c7J2vxfRhYxE9GECS5OpCzkc9pLixta9o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t/6YCYtDCrYPKNqjFyfKiRndFmAm4f/DRsnY8RG+rshLX1SY4kPrajx+ujJHpfZpV CpR4r9daWKqRPELOZqDr7/5QzUZuMZRZrUPE8VFJ/616jWCcOXP+aZSxMthnlKhUjj 3+kdQkaLWSQLrRHxMdoEcE4Rfvt10YFdnDG+ixzWk8ZOvl+OZJpysPHEPj2GCQ7MUW 77FCKwRqt1YzgWobP45kugoOhlJNzOWZ55mi/sqJpvpEmFmPZjvg+h8dlgPIRCwrhM 9DNnufqTi34fUkF9C3fA2/pmp9SH9C64tAoy1uTscoAPlsWWlYGW6fs4DmTNotYeOO ClwoToNEDIsvQ== From: Mike Rapoport To: Andrew Morton Cc: Alexander Viro , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Christopher Lameter , Dan Williams , Dave Hansen , David Hildenbrand , Elena Reshetova , "H. Peter Anvin" , Hagen Paul Pfeifer , Ingo Molnar , James Bottomley , Kees Cook , "Kirill A. Shutemov" , Matthew Wilcox , Matthew Garrett , Mark Rutland , Michal Hocko , Mike Rapoport , Mike Rapoport , Michael Kerrisk , Palmer Dabbelt , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , "Rafael J. Wysocki" , Rick Edgecombe , Roman Gushchin , Shakeel Butt , Shuah Khan , Thomas Gleixner , Tycho Andersen , Will Deacon , Yury Norov , linux-api@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, linux-riscv@lists.infradead.org, x86@kernel.org Subject: [PATCH v19 3/8] set_memory: allow set_direct_map_*_noflush() for multiple pages Date: Thu, 13 May 2021 21:47:29 +0300 Message-Id: <20210513184734.29317-4-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210513184734.29317-1-rppt@kernel.org> References: <20210513184734.29317-1-rppt@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Mike Rapoport The underlying implementations of set_direct_map_invalid_noflush() and set_direct_map_default_noflush() allow updating multiple contiguous pages at once. Add numpages parameter to set_direct_map_*_noflush() to expose this ability with these APIs. Signed-off-by: Mike Rapoport Acked-by: Catalin Marinas [arm64] Cc: Alexander Viro Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Christopher Lameter Cc: Dan Williams Cc: Dave Hansen Cc: David Hildenbrand Cc: Elena Reshetova Cc: Hagen Paul Pfeifer Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: James Bottomley Cc: "Kirill A. Shutemov" Cc: Mark Rutland Cc: Matthew Wilcox Cc: Michael Kerrisk Cc: Palmer Dabbelt Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Rick Edgecombe Cc: Roman Gushchin Cc: Shakeel Butt Cc: Shuah Khan Cc: Thomas Gleixner Cc: Tycho Andersen Cc: Will Deacon --- arch/arm64/include/asm/cacheflush.h | 4 ++-- arch/arm64/mm/pageattr.c | 10 ++++++---- arch/riscv/include/asm/set_memory.h | 4 ++-- arch/riscv/mm/pageattr.c | 8 ++++---- arch/x86/include/asm/set_memory.h | 4 ++-- arch/x86/mm/pat/set_memory.c | 8 ++++---- include/linux/set_memory.h | 4 ++-- kernel/power/snapshot.c | 4 ++-- mm/vmalloc.c | 5 +++-- 9 files changed, 27 insertions(+), 24 deletions(-) diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index 52e5c1623224..ace2c3d7ae7e 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -133,8 +133,8 @@ static __always_inline void __flush_icache_all(void) int set_memory_valid(unsigned long addr, int numpages, int enable); -int set_direct_map_invalid_noflush(struct page *page); -int set_direct_map_default_noflush(struct page *page); +int set_direct_map_invalid_noflush(struct page *page, int numpages); +int set_direct_map_default_noflush(struct page *page, int numpages); bool kernel_page_present(struct page *page); #include diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c index 92eccaf595c8..b53ef37bf95a 100644 --- a/arch/arm64/mm/pageattr.c +++ b/arch/arm64/mm/pageattr.c @@ -148,34 +148,36 @@ int set_memory_valid(unsigned long addr, int numpages, int enable) __pgprot(PTE_VALID)); } -int set_direct_map_invalid_noflush(struct page *page) +int set_direct_map_invalid_noflush(struct page *page, int numpages) { struct page_change_data data = { .set_mask = __pgprot(0), .clear_mask = __pgprot(PTE_VALID), }; + unsigned long size = PAGE_SIZE * numpages; if (!debug_pagealloc_enabled() && !rodata_full) return 0; return apply_to_page_range(&init_mm, (unsigned long)page_address(page), - PAGE_SIZE, change_page_range, &data); + size, change_page_range, &data); } -int set_direct_map_default_noflush(struct page *page) +int set_direct_map_default_noflush(struct page *page, int numpages) { struct page_change_data data = { .set_mask = __pgprot(PTE_VALID | PTE_WRITE), .clear_mask = __pgprot(PTE_RDONLY), }; + unsigned long size = PAGE_SIZE * numpages; if (!debug_pagealloc_enabled() && !rodata_full) return 0; return apply_to_page_range(&init_mm, (unsigned long)page_address(page), - PAGE_SIZE, change_page_range, &data); + size, change_page_range, &data); } #ifdef CONFIG_DEBUG_PAGEALLOC diff --git a/arch/riscv/include/asm/set_memory.h b/arch/riscv/include/asm/set_memory.h index 086f757e8ba3..06aed922ec1f 100644 --- a/arch/riscv/include/asm/set_memory.h +++ b/arch/riscv/include/asm/set_memory.h @@ -32,8 +32,8 @@ void protect_kernel_linear_mapping_text_rodata(void); static inline void protect_kernel_linear_mapping_text_rodata(void) {} #endif -int set_direct_map_invalid_noflush(struct page *page); -int set_direct_map_default_noflush(struct page *page); +int set_direct_map_invalid_noflush(struct page *page, int numpages); +int set_direct_map_default_noflush(struct page *page, int numpages); bool kernel_page_present(struct page *page); #endif /* __ASSEMBLY__ */ diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c index 5e49e4b4a4cc..9618181b70be 100644 --- a/arch/riscv/mm/pageattr.c +++ b/arch/riscv/mm/pageattr.c @@ -156,11 +156,11 @@ int set_memory_nx(unsigned long addr, int numpages) return __set_memory(addr, numpages, __pgprot(0), __pgprot(_PAGE_EXEC)); } -int set_direct_map_invalid_noflush(struct page *page) +int set_direct_map_invalid_noflush(struct page *page, int numpages) { int ret; unsigned long start = (unsigned long)page_address(page); - unsigned long end = start + PAGE_SIZE; + unsigned long end = start + PAGE_SIZE * numpages; struct pageattr_masks masks = { .set_mask = __pgprot(0), .clear_mask = __pgprot(_PAGE_PRESENT) @@ -173,11 +173,11 @@ int set_direct_map_invalid_noflush(struct page *page) return ret; } -int set_direct_map_default_noflush(struct page *page) +int set_direct_map_default_noflush(struct page *page, int numpages) { int ret; unsigned long start = (unsigned long)page_address(page); - unsigned long end = start + PAGE_SIZE; + unsigned long end = start + PAGE_SIZE * numpages; struct pageattr_masks masks = { .set_mask = PAGE_KERNEL, .clear_mask = __pgprot(0) diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h index 43fa081a1adb..5f84aa4b6961 100644 --- a/arch/x86/include/asm/set_memory.h +++ b/arch/x86/include/asm/set_memory.h @@ -80,8 +80,8 @@ int set_pages_wb(struct page *page, int numpages); int set_pages_ro(struct page *page, int numpages); int set_pages_rw(struct page *page, int numpages); -int set_direct_map_invalid_noflush(struct page *page); -int set_direct_map_default_noflush(struct page *page); +int set_direct_map_invalid_noflush(struct page *page, int numpages); +int set_direct_map_default_noflush(struct page *page, int numpages); bool kernel_page_present(struct page *page); extern int kernel_set_to_readonly; diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c index 156cd235659f..15a55d6e9cec 100644 --- a/arch/x86/mm/pat/set_memory.c +++ b/arch/x86/mm/pat/set_memory.c @@ -2192,14 +2192,14 @@ static int __set_pages_np(struct page *page, int numpages) return __change_page_attr_set_clr(&cpa, 0); } -int set_direct_map_invalid_noflush(struct page *page) +int set_direct_map_invalid_noflush(struct page *page, int numpages) { - return __set_pages_np(page, 1); + return __set_pages_np(page, numpages); } -int set_direct_map_default_noflush(struct page *page) +int set_direct_map_default_noflush(struct page *page, int numpages) { - return __set_pages_p(page, 1); + return __set_pages_p(page, numpages); } #ifdef CONFIG_DEBUG_PAGEALLOC diff --git a/include/linux/set_memory.h b/include/linux/set_memory.h index fe1aa4e54680..c650f82db813 100644 --- a/include/linux/set_memory.h +++ b/include/linux/set_memory.h @@ -15,11 +15,11 @@ static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } #endif #ifndef CONFIG_ARCH_HAS_SET_DIRECT_MAP -static inline int set_direct_map_invalid_noflush(struct page *page) +static inline int set_direct_map_invalid_noflush(struct page *page, int numpages) { return 0; } -static inline int set_direct_map_default_noflush(struct page *page) +static inline int set_direct_map_default_noflush(struct page *page, int numpages) { return 0; } diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index 1a221dcb3c01..27cb4e7086b7 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -86,7 +86,7 @@ static inline void hibernate_restore_unprotect_page(void *page_address) {} static inline void hibernate_map_page(struct page *page) { if (IS_ENABLED(CONFIG_ARCH_HAS_SET_DIRECT_MAP)) { - int ret = set_direct_map_default_noflush(page); + int ret = set_direct_map_default_noflush(page, 1); if (ret) pr_warn_once("Failed to remap page\n"); @@ -99,7 +99,7 @@ static inline void hibernate_unmap_page(struct page *page) { if (IS_ENABLED(CONFIG_ARCH_HAS_SET_DIRECT_MAP)) { unsigned long addr = (unsigned long)page_address(page); - int ret = set_direct_map_invalid_noflush(page); + int ret = set_direct_map_invalid_noflush(page, 1); if (ret) pr_warn_once("Failed to remap page\n"); diff --git a/mm/vmalloc.c b/mm/vmalloc.c index a13ac524f6ff..5d96fee17226 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -2469,14 +2469,15 @@ struct vm_struct *remove_vm_area(const void *addr) } static inline void set_area_direct_map(const struct vm_struct *area, - int (*set_direct_map)(struct page *page)) + int (*set_direct_map)(struct page *page, + int numpages)) { int i; /* HUGE_VMALLOC passes small pages to set_direct_map */ for (i = 0; i < area->nr_pages; i++) if (page_address(area->pages[i])) - set_direct_map(area->pages[i]); + set_direct_map(area->pages[i], 1); } /* Handle removing and resetting vm mappings related to the vm_struct. */