diff options
| author | Richard Weinberger <richard@nod.at> | 2013-04-17 01:00:53 +0200 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2013-04-17 15:13:38 +0100 |
| commit | 8c58bf3eec3b8fc8162fe557e9361891c20758f2 (patch) | |
| tree | c88b22186b51a1fe78d4d6ffcbea058e27063e21 /arch/x86 | |
| parent | 3668011d4ad556224f7c012c1e870a6eaa0e59da (diff) | |
| download | linux-8c58bf3eec3b8fc8162fe557e9361891c20758f2.tar.bz2 | |
x86,efi: Implement efi_no_storage_paranoia parameter
Using this parameter one can disable the storage_size/2 check if
he is really sure that the UEFI does sane gc and fulfills the spec.
This parameter is useful if a devices uses more than 50% of the
storage by default.
The Intel DQSW67 desktop board is such a sucker for exmaple.
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index 4f364c7c6111..e4a86a677ce1 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -113,6 +113,15 @@ static int __init setup_add_efi_memmap(char *arg) } early_param("add_efi_memmap", setup_add_efi_memmap); +static bool efi_no_storage_paranoia; + +static int __init setup_storage_paranoia(char *arg) +{ + efi_no_storage_paranoia = true; + return 0; +} +early_param("efi_no_storage_paranoia", setup_storage_paranoia); + static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc) { @@ -1137,7 +1146,10 @@ efi_status_t efi_query_variable_store(u32 attributes, unsigned long size) */ if (!storage_size || size > remaining_size || - (max_size && size > max_size) || + (max_size && size > max_size)) + return EFI_OUT_OF_RESOURCES; + + if (!efi_no_storage_paranoia && ((active_size + size + VAR_METADATA_SIZE > storage_size / 2) && (remaining_size - size < storage_size / 2))) return EFI_OUT_OF_RESOURCES; |