Commit-ID: a19ebf59e20880c87dd49b6336476307559ac5ba Gitweb: http://git.kernel.org/tip/a19ebf59e20880c87dd49b6336476307559ac5ba Author: Sai Praneeth <sai.praneeth.prakhya@xxxxxxxxx> AuthorDate: Tue, 31 Jan 2017 13:21:36 +0000 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Wed, 1 Feb 2017 08:45:44 +0100 efi: Introduce the EFI_MEM_ATTR bit and set it from the 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 the EFI Runtime code and data regions by the 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@xxxxxxxxx> Signed-off-by: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> Reviewed-by: Lee, Chun-Yi <jlee@xxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Ravi Shankar <ravi.v.shankar@xxxxxxxxx> Cc: Ricardo Neri <ricardo.neri@xxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: linux-efi@xxxxxxxxxxxxxxx Link: http://lkml.kernel.org/r/1485868902-20401-5-git-send-email-ard.biesheuvel@xxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- drivers/firmware/efi/memattr.c | 1 + include/linux/efi.h | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/firmware/efi/memattr.c b/drivers/firmware/efi/memattr.c index 236004b..4021974 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 6642c4d..5f632bf 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 an EFI_MEMORY_ATTRIBUTES table? */ #ifdef CONFIG_EFI /* -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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