x86: reserve EFI memory map with reserve_early
This patch reserves the EFI memory map with reserve_early(). Because EFI
memory map is allocated by bootloader, if it is not reserved by
reserved_early(), it may be overwritten through address returned by
find_e820_area().
Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: andi@firstfloor.org
Cc: mingo@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 2599b27..078c02f 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -330,8 +330,10 @@
#endif
#ifdef CONFIG_EFI
if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
- "EL64", 4))
+ "EL64", 4)) {
efi_enabled = 1;
+ efi_reserve_early();
+ }
#endif
ARCH_SETUP
@@ -457,9 +459,6 @@
acpi_reserve_bootmem();
#endif
- if (efi_enabled)
- efi_reserve_bootmem();
-
#ifdef CONFIG_X86_MPPARSE
/*
* Find and reserve possible boot-time SMP configuration: