diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2018-02-14 14:16:52 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-02-14 15:11:14 +0300 |
| commit | 5c7919bb1994f8dc7fed219a5db09e6bb9d473a5 (patch) | |
| tree | 4fb9eab6c6799e64db74edb3fd348b9482b9edf3 /arch/x86/mm/dump_pagetables.c | |
| parent | e626e6bb0dfaca41487241d49ce0ae827716101a (diff) | |
| download | linux-5c7919bb1994f8dc7fed219a5db09e6bb9d473a5.tar.xz | |
x86/mm: Make LDT_BASE_ADDR dynamic
LDT_BASE_ADDR has different value in 4- and 5-level paging
configurations.
We need to make it dynamic in preparation for boot-time switching
between paging modes.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20180214111656.88514-6-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm/dump_pagetables.c')
| -rw-r--r-- | arch/x86/mm/dump_pagetables.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c index 2a4849e92831..a89f2dbc3531 100644 --- a/arch/x86/mm/dump_pagetables.c +++ b/arch/x86/mm/dump_pagetables.c @@ -89,7 +89,7 @@ static struct addr_marker address_markers[] = { [KASAN_SHADOW_END_NR] = { KASAN_SHADOW_END, "KASAN shadow end" }, #endif #ifdef CONFIG_MODIFY_LDT_SYSCALL - [LDT_NR] = { LDT_BASE_ADDR, "LDT remap" }, + [LDT_NR] = { 0UL, "LDT remap" }, #endif [CPU_ENTRY_AREA_NR] = { CPU_ENTRY_AREA_BASE,"CPU entry Area" }, #ifdef CONFIG_X86_ESPFIX64 @@ -570,6 +570,9 @@ static int __init pt_dump_init(void) address_markers[LOW_KERNEL_NR].start_address = PAGE_OFFSET; address_markers[VMALLOC_START_NR].start_address = VMALLOC_START; address_markers[VMEMMAP_START_NR].start_address = VMEMMAP_START; +#ifdef CONFIG_MODIFY_LDT_SYSCALL + address_markers[LDT_NR].start_address = LDT_BASE_ADDR; +#endif #endif #ifdef CONFIG_X86_32 address_markers[VMALLOC_START_NR].start_address = VMALLOC_START; |