diff mbox

[External,RFC,v1,6/6] arch/x86/mm: create page table mapping for DRAM and NVDIMM both

Message ID HK2PR03MB1684101846A9D9639BE00001929A0@HK2PR03MB1684.apcprd03.prod.outlook.com (mailing list archive)
State New, archived
Headers show

Commit Message

Huaisheng HS1 Ye May 8, 2018, 2:35 a.m. UTC 
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@lenovo.com>
Signed-off-by: Ocean He <hehy1@lenovo.com>
---
 arch/x86/mm/init_64.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
diff mbox

Patch

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));