diff options
| author | Sai Praneeth <sai.praneeth.prakhya@intel.com> | 2016-12-06 11:16:01 -0800 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-01-17 15:49:58 +0000 |
| commit | 8b447fd116ed6bda9deec2860213d0111e0d6d09 (patch) | |
| tree | 50909195e82c22d5b0196e6c14c39d29ebbf0085 | |
| parent | 8d8b9c91f2cc17e03b53ac96d14469573202ae14 (diff) | |
| download | efi-8b447fd116ed6bda9deec2860213d0111e0d6d09.tar.gz | |
efi: Introduce EFI_MEM_ATTR bit and set it from memory attributes table
UEFI v2.6 introduces a configuration table called
EFI_MEMORY_ATTRIBUTES_TABLE which provides additional information about
efi runtime regions. Currently this table describes memory protections
that may be applied to EFI Runtime code and data regions by kernel.
Allocate a EFI_XXX bit to keep track of whether this feature is
published by firmware or not.
Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Reviewed-by: Lee, Chun-Yi <jlee@suse.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Ricardo Neri <ricardo.neri@intel.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Ravi Shankar <ravi.v.shankar@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
| -rw-r--r-- | drivers/firmware/efi/memattr.c | 1 | ||||
| -rw-r--r-- | include/linux/efi.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/drivers/firmware/efi/memattr.c b/drivers/firmware/efi/memattr.c index 236004b9a50d32..4021974605070b 100644 --- a/drivers/firmware/efi/memattr.c +++ b/drivers/firmware/efi/memattr.c @@ -43,6 +43,7 @@ int __init efi_memattr_init(void) tbl_size = sizeof(*tbl) + tbl->num_entries * tbl->desc_size; memblock_reserve(efi.mem_attr_table, tbl_size); + set_bit(EFI_MEM_ATTR, &efi.flags); unmap: early_memunmap(tbl, sizeof(*tbl)); diff --git a/include/linux/efi.h b/include/linux/efi.h index 6642c4d9d11d70..b17f73113bd2c1 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -1065,6 +1065,7 @@ extern int __init efi_setup_pcdp_console(char *); #define EFI_ARCH_1 7 /* First arch-specific bit */ #define EFI_DBG 8 /* Print additional debug info at runtime */ #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */ +#define EFI_MEM_ATTR 10 /* Did firmware publish EFI_MEMORY_ATTRIBUTES table? */ #ifdef CONFIG_EFI /* |