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-rw-r--r--Documentation/kernel-parameters.txt3
-rw-r--r--arch/x86/platform/efi/efi.c4
-rw-r--r--drivers/firmware/efi/efi.c9
3 files changed, 13 insertions, 3 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 08df275eee2b..d0e431611a04 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -992,13 +992,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
Format: {"off" | "on" | "skip[mbr]"}
efi= [EFI]
- Format: { "old_map", "nochunk" }
+ Format: { "old_map", "nochunk", "noruntime" }
old_map [X86-64]: switch to the old ioremap-based EFI
runtime services mapping. 32-bit still uses this one by
default.
nochunk: disable reading files in "chunks" in the EFI
boot stub, as chunking can cause problems with some
firmware implementations.
+ noruntime : disable EFI runtime services support
efi_no_storage_paranoia [EFI; X86]
Using this parameter you can use more than 50% of
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index c73a7df5d37f..00f4cc566adb 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -930,11 +930,11 @@ u64 efi_mem_attributes(unsigned long phys_addr)
return 0;
}
-static int __init parse_efi_cmdline(char *str)
+static int __init arch_parse_efi_cmdline(char *str)
{
if (parse_option_str(str, "old_map"))
set_bit(EFI_OLD_MEMMAP, &efi.flags);
return 0;
}
-early_param("efi", parse_efi_cmdline);
+early_param("efi", arch_parse_efi_cmdline);
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index c8f01a73edb5..cebfa36a27ae 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -54,6 +54,15 @@ bool efi_runtime_disabled(void)
return disable_runtime;
}
+static int __init parse_efi_cmdline(char *str)
+{
+ if (parse_option_str(str, "noruntime"))
+ disable_runtime = true;
+
+ return 0;
+}
+early_param("efi", parse_efi_cmdline);
+
static struct kobject *efi_kobj;
static struct kobject *efivars_kobj;