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efi: Introduce EFI_NX_PE_DATA bit and set it from properties table

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UEFI v2.5 introduces a runtime memory protection feature that splits
PE/COFF runtime images into separate code and data regions. Since this
may require special handling by the OS, allocate a EFI_xxx bit to
keep track of whether this feature is currently active or not.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
Ard Biesheuvel
2015-09-23 07:29:34 -07:00
committed by Matt Fleming
parent bf924863c9
commit a104171334
2 changed files with 19 additions and 0 deletions
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include/linux/efi.h
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@@ -973,6 +973,7 @@ extern int __init efi_setup_pcdp_console(char *);
#define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
#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? */
#ifdef CONFIG_EFI
/*