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authorDave Young <dyoung@redhat.com>2014-08-18 09:30:07 +0800
committerMatt Fleming <matt.fleming@intel.com>2014-10-03 18:40:59 +0100
commit6632210f50530ea53dd21f786f2854609d928689 (patch)
treed7b81d1cec03e959fb87fdcfb5c46a8506461ff3 /arch/arm64
parent88f8abd594082b9c08789e8527e4e38116a963ec (diff)
arm64/efi: Do not enter virtual mode if booting with efi=noruntime or noefi
In case efi runtime disabled via noefi kernel cmdline arm64_enter_virtual_mode should error out. At the same time move early_memunmap(memmap.map, mapsize) to the beginning of the function or it will leak early mem. Signed-off-by: Dave Young <dyoung@redhat.com> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/kernel/efi.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index 6ed0362dd579..8f5db4a3c9d9 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -392,11 +392,16 @@ static int __init arm64_enter_virtual_mode(void)
return -1;
}
- pr_info("Remapping and enabling EFI services.\n");
-
- /* replace early memmap mapping with permanent mapping */
mapsize = memmap.map_end - memmap.map;
early_memunmap(memmap.map, mapsize);
+
+ if (efi_runtime_disabled()) {
+ pr_info("EFI runtime services will be disabled.\n");
+ return -1;
+ }
+
+ pr_info("Remapping and enabling EFI services.\n");
+ /* replace early memmap mapping with permanent mapping */
memmap.map = (__force void *)ioremap_cache((phys_addr_t)memmap.phys_map,
mapsize);
memmap.map_end = memmap.map + mapsize;