From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1521619856; cv=none; d=google.com; s=arc-20160816; b=ZSQLiM3hU0rfdP5NeGt5e4lo7Hw1ZZQS3iqgM5hdpHaDPazlSmS5aOtR6iaM2RW8sC sNeb4VGH+j2CiFPVBTf4jwzfSqYPky7gGL6Zt/qk3I1Vq3AIDSXK/gO7MTEXR7lbAUwz 4DKTI6nHCXyXNWUphnrbdkdVgDBRjYu8LxCyPJN5G1daNE9qlRc23ql3CVMAV31wZLBa 8ZIPaX/MqUgkzUZE2L4nSou3XAYTwJKkmwPmmPO4kkKtndrYX7MmRHi953ELvkS7B/Xi +q364H6MsrkRC7Tqkts+LDpd6ry7BMbuX4jMPwcMoZNYHvzMcs3lryTSfRqyS1a63FWA KcaQ== 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=RABvO65frYI8v2NwjIigZ+5RwFAonwVr7w9ovXuZHJA=; b=gel82xBCe0nYs1Pr0nS+L6GIyGFQsxWR8nDV3GKWthnG7ORSaHrWGQVoSYRMR6lvkk fKI2gtkmjnxe+0Ri44FygXRBhp+a4AqR2mBq0Fa44TTVnt78kWHAPwkv2eP/M9s6XcYv dyHlg7iwbv4/Jg+lukOBJDVVh94fjZKDIhMx1XnYvkOnKlJzXr1AX9igiaPPafi4pg68 ++3G/c40OyySXGngDbJgHi3BrBi5k6ZtJYBZm2XX/I5MJGSYLlVEZW5ZMP2c+x/b73Sn i/629MX4ylwgKzKZfB1uB2FwIlG7ss5IARaq2OZDmIAVuwwYY7GWVerQaZ6RtfT5aOkn hNNg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=hR3gniP3; 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=hR3gniP3; 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: AG47ELs9nWrCPrIAgj9ROK6T84t6hMj1hs0pw5jaxYJZVI2VSb2B9jMGPHDpn93sXL1ZimAoohPZxA== 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 3/4] arm64: introduce pfn_valid_region() Date: Wed, 21 Mar 2018 01:09:55 -0700 Message-Id: <1521619796-3846-4-git-send-email-hejianet@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1521619796-3846-1-git-send-email-hejianet@gmail.com> References: <1521619796-3846-1-git-send-email-hejianet@gmail.com> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1595534062221218011?= X-GMAIL-MSGID: =?utf-8?q?1595534062221218011?= 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 | 19 ++++++++++++++++++- 2 files changed, 20 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..1d9842e 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -290,7 +290,24 @@ 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) +{ + struct memblock_type *type = &memblock.memory; + + if (*last_idx != -1 && pfn < PFN_DOWN(type->regions[*last_idx].base + + type->regions[*last_idx].size)) + 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