diff options
Diffstat (limited to 'arch/x86/mm/init_64.c')
| -rw-r--r-- | arch/x86/mm/init_64.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 6714712bd5da..7bf1ddb54537 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -465,7 +465,8 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long paddr, unsigned long paddr_end, /* * Create PUD level page table mapping for physical addresses. The virtual - * and physical address have to be aligned at this level. + * and physical address do not have to be aligned at this level. KASLR can + * randomize virtual addresses up to this level. * It returns the last physical address mapped. */ static unsigned long __meminit @@ -474,14 +475,18 @@ phys_pud_init(pud_t *pud_page, unsigned long paddr, unsigned long paddr_end, { unsigned long pages = 0, paddr_next; unsigned long paddr_last = paddr_end; - int i = pud_index(paddr); + unsigned long vaddr = (unsigned long)__va(paddr); + int i = pud_index(vaddr); for (; i < PTRS_PER_PUD; i++, paddr = paddr_next) { - pud_t *pud = pud_page + pud_index(paddr); + pud_t *pud; pmd_t *pmd; pgprot_t prot = PAGE_KERNEL; + vaddr = (unsigned long)__va(paddr); + pud = pud_page + pud_index(vaddr); paddr_next = (paddr & PUD_MASK) + PUD_SIZE; + if (paddr >= paddr_end) { if (!after_bootmem && !e820_any_mapped(paddr & PUD_MASK, paddr_next, @@ -551,7 +556,7 @@ phys_pud_init(pud_t *pud_page, unsigned long paddr, unsigned long paddr_end, /* * Create page table mapping for the physical memory for specific physical - * addresses. The virtual and physical addresses have to be aligned on PUD level + * addresses. The virtual and physical addresses have to be aligned on PMD level * down. It returns the last physical address mapped. */ unsigned long __meminit |
