From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f71.google.com (mail-pg0-f71.google.com [74.125.83.71]) by kanga.kvack.org (Postfix) with ESMTP id BB1486B026D for ; Fri, 30 Mar 2018 04:17:17 -0400 (EDT) Received: by mail-pg0-f71.google.com with SMTP id i127so6248041pgc.22 for ; Fri, 30 Mar 2018 01:17:17 -0700 (PDT) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id c2sor2432130pfn.15.2018.03.30.01.17.16 for (Google Transport Security); Fri, 30 Mar 2018 01:17:16 -0700 (PDT) From: Jia He Subject: [PATCH v4 4/5] arm64: introduce pfn_valid_region() Date: Fri, 30 Mar 2018 01:15:54 -0700 Message-Id: <1522397755-33393-5-git-send-email-hejianet@gmail.com> In-Reply-To: <1522397755-33393-1-git-send-email-hejianet@gmail.com> References: <1522397755-33393-1-git-send-email-hejianet@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Russell King , Andrew Morton , Michal Hocko , Catalin Marinas , Mel Gorman , Will Deacon , Mark Rutland , "H. Peter Anvin" Cc: Pavel Tatashin , Daniel Jordan , AKASHI Takahiro , Gioh Kim , Steven Sistare , Daniel Vacek , Eugeniu Rosca , Vlastimil Babka , linux-kernel@vger.kernel.org, linux-mm@kvack.org, James Morse , Ard Biesheuvel , Steve Capper , Thomas Gleixner , Ingo Molnar , x86@kernel.org, Greg Kroah-Hartman , Kate Stewart , Philippe Ombredanne , Johannes Weiner , Kemi Wang , Petr Tesarik , YASUAKI ISHIMATSU , Andrey Ryabinin , Nikolay Borisov , richard.weiyang@gmail.com, Jia He , Jia He This is the preparation for further optimizing in early_pfn_valid on arm and arm64. Signed-off-by: Jia He --- arch/arm/include/asm/page.h | 3 ++- arch/arm/mm/init.c | 23 +++++++++++++++++++++++ arch/arm64/include/asm/page.h | 3 ++- arch/arm64/mm/init.c | 23 +++++++++++++++++++++++ 4 files changed, 50 insertions(+), 2 deletions(-) diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h index 7a0404f..559b414 100644 --- a/arch/arm/include/asm/page.h +++ b/arch/arm/include/asm/page.h @@ -158,7 +158,8 @@ typedef struct page *pgtable_t; #ifdef CONFIG_HAVE_ARCH_PFN_VALID extern int early_region_idx; -extern int pfn_valid(unsigned long); +extern int pfn_valid(unsigned long pfn); +extern int pfn_valid_region(unsigned long pfn, int *last_idx); #endif #include diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 7779804..11f9b82 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -201,6 +201,29 @@ int pfn_valid(unsigned long pfn) } EXPORT_SYMBOL(pfn_valid); +int pfn_valid_region(unsigned long pfn, int *last_idx) +{ + unsigned long start_pfn, end_pfn; + struct memblock_type *type = &memblock.memory; + struct memblock_region *regions = type->regions; + + if (*last_idx != -1) { + start_pfn = PFN_DOWN(regions[*last_idx].base); + end_pfn = PFN_DOWN(regions[*last_idx].base + + regions[*last_idx].size); + + if (pfn >= start_pfn && pfn < end_pfn) + return !memblock_is_nomap(®ions[*last_idx]); + } + + *last_idx = memblock_search_pfn_regions(pfn); + if (*last_idx == -1) + return false; + + return !memblock_is_nomap(®ions[*last_idx]); +} +EXPORT_SYMBOL(pfn_valid_region); + /* HAVE_MEMBLOCK is always enabled on arm */ unsigned long __init_memblock memblock_next_valid_pfn(unsigned long pfn, int *last_idx) diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h index 84b503a..27892d5 100644 --- a/arch/arm64/include/asm/page.h +++ b/arch/arm64/include/asm/page.h @@ -39,7 +39,8 @@ typedef struct page *pgtable_t; #ifdef CONFIG_HAVE_ARCH_PFN_VALID extern int early_region_idx; -extern int pfn_valid(unsigned long); +extern int pfn_valid(unsigned long pfn); +extern int pfn_valid_region(unsigned long pfn, int *last_idx); #endif #include diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index cd9b473..6dedd77 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -293,6 +293,29 @@ int pfn_valid(unsigned long pfn) } EXPORT_SYMBOL(pfn_valid); +int pfn_valid_region(unsigned long pfn, int *last_idx) +{ + unsigned long start_pfn, end_pfn; + struct memblock_type *type = &memblock.memory; + struct memblock_region *regions = type->regions; + + if (*last_idx != -1) { + start_pfn = PFN_DOWN(regions[*last_idx].base); + end_pfn = PFN_DOWN(regions[*last_idx].base + + regions[*last_idx].size); + + if (pfn >= start_pfn && pfn < end_pfn) + return !memblock_is_nomap(®ions[*last_idx]); + } + + *last_idx = memblock_search_pfn_regions(pfn); + if (*last_idx == -1) + return false; + + return !memblock_is_nomap(®ions[*last_idx]); +} +EXPORT_SYMBOL(pfn_valid_region); + /* HAVE_MEMBLOCK is always enabled on arm64 */ unsigned long __init_memblock memblock_next_valid_pfn(unsigned long pfn, int *last_idx) -- 2.7.4