From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1522033418; cv=none; d=google.com; s=arc-20160816; b=wC5eLTS0q53uBwOIIp/BMtFUMHZR+6AKzkscPoRLYTAdUNuieQtQzzl35Gl+mi93A2 ebaEdEgReADTVnWQ2v2dlXPPHDPWjgv7UBdY8v0c0bi2JV++iletWnwVQsuHKcrcJmyq scThTFJSPMeNBc29hEAARYRnw6vjZy7FCxS7gusg6L9/Psl3P0PDz1K02ud0qccDNxpQ EFuvJyKUI+A9gnXs7F6xidBPXm8D9PsZ6buRBcp3W/yUhEeg29D93H4M2ttOsqK8Xjnk e8ZOCBrOFbPWygF/dV2BPbuzxE0f9DY1gu5hiir843ddanEWDme3ENgBAPEp9UrfPHzD N/pQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature:arc-authentication-results; bh=CgVDV6TnbNT0G6IPq/hrv4xR6TOYvoiXvBonAgQwMio=; b=IINXZNX1GRJkFtiEylNGFcJPNqviMXaGYPmxeBTihE8Br2P9tWP/pz04X9+HIEdG0A L+dYNlTNj7xeL+ouNkmuJf71Ksd/zLuKhCSL4wHYaNa6DFnG+bUnIrjmqS/aera5ut+7 fzEj99uM9B+WsgcnVAmebHe1CCJQdoUlvRa6Kx3mmiqDRBuVwzlOc90mvaHUIu7tirxY tGrmO3UwJ+KLJmiLpBfsxleEPR6FYKrSUMLpOPURIHguKS1pUIrYWz1xRvgdT/wy2yvp 3yy76JzVFR0hONMrAIjdEy4YKCN4YnEe3RVIuWQ5rADNJcc9weI7KPbu6hgMK97CrGKN YHyQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=ievLv0Uf; spf=pass (google.com: domain of hejianet@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=hejianet@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=ievLv0Uf; spf=pass (google.com: domain of hejianet@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=hejianet@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com X-Google-Smtp-Source: AG47ELumu+HtlaqnLKaOfuAL2ImNiTcLQpPzOY1XjmjnO+jVr/LPbbm9yEJGk4YQK1fBsahwMxLmDw== From: Jia He To: Andrew Morton , Michal Hocko , Catalin Marinas , Mel Gorman , Will Deacon , Mark Rutland , Ard Biesheuvel , Thomas Gleixner , Ingo Molnar , "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 , Steve Capper , x86@kernel.org, Greg Kroah-Hartman , Kate Stewart , Philippe Ombredanne , Johannes Weiner , Kemi Wang , Petr Tesarik , YASUAKI ISHIMATSU , Andrey Ryabinin , Nikolay Borisov , Jia He , Jia He Subject: [PATCH v3 4/5] arm64: introduce pfn_valid_region() Date: Sun, 25 Mar 2018 20:02:18 -0700 Message-Id: <1522033340-6575-5-git-send-email-hejianet@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1522033340-6575-1-git-send-email-hejianet@gmail.com> References: <1522033340-6575-1-git-send-email-hejianet@gmail.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1595967713881202535?= X-GMAIL-MSGID: =?utf-8?q?1595967713881202535?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: This is the preparation for further optimizing in early_pfn_valid on arm64. Signed-off-by: Jia He --- arch/arm64/include/asm/page.h | 3 ++- arch/arm64/mm/init.c | 25 ++++++++++++++++++++++++- 2 files changed, 26 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h index 60d02c8..da2cba3 100644 --- a/arch/arm64/include/asm/page.h +++ b/arch/arm64/include/asm/page.h @@ -38,7 +38,8 @@ extern void clear_page(void *to); typedef struct page *pgtable_t; #ifdef CONFIG_HAVE_ARCH_PFN_VALID -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 00e7b90..06433d5 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -290,7 +290,30 @@ int pfn_valid(unsigned long pfn) return memblock_is_map_memory(pfn << PAGE_SHIFT); } EXPORT_SYMBOL(pfn_valid); -#endif + +int pfn_valid_region(unsigned long pfn, int *last_idx) +{ + unsigned long start_pfn, end_pfn; + struct memblock_type *type = &memblock.memory; + + if (*last_idx != -1) { + start_pfn = PFN_DOWN(type->regions[*last_idx].base); + end_pfn= PFN_DOWN(type->regions[*last_idx].base + + type->regions[*last_idx].size); + + if (pfn >= start_pfn && pfn < end_pfn) + return !memblock_is_nomap( + &memblock.memory.regions[*last_idx]); + } + + *last_idx = memblock_search_pfn_regions(pfn); + if (*last_idx == -1) + return false; + + return !memblock_is_nomap(&memblock.memory.regions[*last_idx]); +} +EXPORT_SYMBOL(pfn_valid_region); +#endif /*CONFIG_HAVE_ARCH_PFN_VALID*/ #ifndef CONFIG_SPARSEMEM static void __init arm64_memory_present(void) -- 2.7.4