From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1521894357; cv=none; d=google.com; s=arc-20160816; b=BbdWpK/kJLUCpKUd+f3NOqi6oVShwWa+AdUm9N+O6fCHAVzDra3ig/IK1JvOXDBuh5 VHY35vkrxYVd6A8XGqGbqNOg1pswUf0MsP3lPnsLyEXDV4EO1sjXvJC7eCgr30ES6p5j 6yUmSGJNlsRJshkMKF79PZ8QB/+REucfIAMOm6rNnYKORAlPzJiQ5xOV7LRJaLJUzFj8 rdSvlqocBYF1yL+OjntUKZhbZnViGPzKu0OoVD0SLrLZinLE86wsRDZ5f5NJOWOX9Xiz Wh2dRj3fHwZ8Z3i5XDiCoM3eoaZ1roWvUcJyzrPulCQJ//8Tc3W2K88S35zOQeds+nJg IL3A== 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=6pP1sGfEYf76VUP0NdxYf9dNCaWRxdSCR4omDaZW2B4=; b=gl4f7XEawBfYZ4z3AkS/sYH0pqFatwo3QJ2KPN80o53z6k7AynKyKw67Yx6Ycn+tZb BtPZpf5X1pIgfXye/5LW4zNcD74YzXuuWGU0gQ7fxANiSSd1+VKOozulnwaAD73JXQ/N 9srUb2WNB78+k5VCWs4tPV1ZD5stKlLL+LEE2y+WUkJgJIII9xpF71GJCZ8CQPNbPpXJ kLnDbUdiJexeBE4G7BALsak49C6bw8U2FX9WJH0w8Bv/Zc45vc5xvrxBjhA4akf8VoFc hdU/6RGnmyspRmfaoeOe+PE7sZjYqEWO3IKEtw2Oz/o879LEI+nXUtJRTL/8yKCbU5BQ lsHw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=YSbCROLI; 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=YSbCROLI; 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: AG47ELuOuFnNgzWVxER3JfHitbh9UF238XLMWoITCE2vt4g7k6uZ/fBHFKJKsXQquaUBOfJ8hcu+yw== From: Jia He To: Andrew Morton , Michal Hocko , Catalin Marinas , Mel Gorman , Will Deacon , Mark Rutland , 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 , Ard Biesheuvel , 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 v2 4/5] arm64: introduce pfn_valid_region() Date: Sat, 24 Mar 2018 05:24:41 -0700 Message-Id: <1521894282-6454-5-git-send-email-hejianet@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1521894282-6454-1-git-send-email-hejianet@gmail.com> References: <1521894282-6454-1-git-send-email-hejianet@gmail.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1595821897799214270?= X-GMAIL-MSGID: =?utf-8?q?1595821897799214270?= 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..9122102 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 && end_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