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Date: Tue, 8 May 2018 02:35:13 +0000 From: Huaisheng HS1 Ye <yehs1@...ovo.com> To: "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>, "linux-mm@...ck.org" <linux-mm@...ck.org> CC: "mhocko@...e.com" <mhocko@...e.com>, "willy@...radead.org" <willy@...radead.org>, "vbabka@...e.cz" <vbabka@...e.cz>, "mgorman@...hsingularity.net" <mgorman@...hsingularity.net>, "pasha.tatashin@...cle.com" <pasha.tatashin@...cle.com>, "alexander.levin@...izon.com" <alexander.levin@...izon.com>, "hannes@...xchg.org" <hannes@...xchg.org>, "penguin-kernel@...ove.SAKURA.ne.jp" <penguin-kernel@...ove.SAKURA.ne.jp>, "colyli@...e.de" <colyli@...e.de>, NingTing Cheng <chengnt@...ovo.com>, "Ocean HY1 He" <hehy1@...ovo.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org> Subject: [External] [RFC PATCH v1 6/6] arch/x86/mm: create page table mapping for DRAM and NVDIMM both Create PTE, PMD, PUD and P4D levels page table mapping for physical addresses of DRAM and NVDIMM both. Here E820_TYPE_PMEM represents the region of e820_table. Signed-off-by: Huaisheng Ye <yehs1@...ovo.com> Signed-off-by: Ocean He <hehy1@...ovo.com> --- arch/x86/mm/init_64.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index af11a28..c03c2091 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -420,6 +420,10 @@ void __init cleanup_highmap(void) if (!after_bootmem && !e820__mapped_any(paddr & PAGE_MASK, paddr_next, E820_TYPE_RAM) && +#ifdef CONFIG_ZONE_NVM + !e820__mapped_any(paddr & PAGE_MASK, paddr_next, + E820_TYPE_PMEM) && +#endif !e820__mapped_any(paddr & PAGE_MASK, paddr_next, E820_TYPE_RESERVED_KERN)) set_pte(pte, __pte(0)); @@ -475,6 +479,10 @@ void __init cleanup_highmap(void) if (!after_bootmem && !e820__mapped_any(paddr & PMD_MASK, paddr_next, E820_TYPE_RAM) && +#ifdef CONFIG_ZONE_NVM + !e820__mapped_any(paddr & PAGE_MASK, paddr_next, + E820_TYPE_PMEM) && +#endif !e820__mapped_any(paddr & PMD_MASK, paddr_next, E820_TYPE_RESERVED_KERN)) set_pmd(pmd, __pmd(0)); @@ -561,6 +569,10 @@ void __init cleanup_highmap(void) if (!after_bootmem && !e820__mapped_any(paddr & PUD_MASK, paddr_next, E820_TYPE_RAM) && +#ifdef CONFIG_ZONE_NVM + !e820__mapped_any(paddr & PAGE_MASK, paddr_next, + E820_TYPE_PMEM) && +#endif !e820__mapped_any(paddr & PUD_MASK, paddr_next, E820_TYPE_RESERVED_KERN)) set_pud(pud, __pud(0)); @@ -647,6 +659,10 @@ void __init cleanup_highmap(void) if (!after_bootmem && !e820__mapped_any(paddr & P4D_MASK, paddr_next, E820_TYPE_RAM) && +#ifdef CONFIG_ZONE_NVM + !e820__mapped_any(paddr & PAGE_MASK, paddr_next, + E820_TYPE_PMEM) && +#endif !e820__mapped_any(paddr & P4D_MASK, paddr_next, E820_TYPE_RESERVED_KERN)) set_p4d(p4d, __p4d(0)); -- 1.8.3.1
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