From eedb92abb9bb03ef21442614a6f5867eaac6e77f Mon Sep 17 00:00:00 2001 From: "Kirill A. Shutemov" Date: Wed, 14 Feb 2018 14:16:50 +0300 Subject: x86/mm: Make virtual memory layout dynamic for CONFIG_X86_5LEVEL=y We need to be able to adjust virtual memory layout at runtime to be able to switch between 4- and 5-level paging at boot-time. KASLR already has movable __VMALLOC_BASE, __VMEMMAP_BASE and __PAGE_OFFSET. Let's re-use it. Signed-off-by: Kirill A. Shutemov Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20180214111656.88514-4-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar --- arch/x86/include/asm/kaslr.h | 4 ---- 1 file changed, 4 deletions(-) (limited to 'arch/x86/include/asm/kaslr.h') diff --git a/arch/x86/include/asm/kaslr.h b/arch/x86/include/asm/kaslr.h index 460991e..db7ba2f 100644 --- a/arch/x86/include/asm/kaslr.h +++ b/arch/x86/include/asm/kaslr.h @@ -5,10 +5,6 @@ unsigned long kaslr_get_random_long(const char *purpose); #ifdef CONFIG_RANDOMIZE_MEMORY -extern unsigned long page_offset_base; -extern unsigned long vmalloc_base; -extern unsigned long vmemmap_base; - void kernel_randomize_memory(void); #else static inline void kernel_randomize_memory(void) { } -- cgit v1.1