Define ARCH_EFI_IRQ_FLAGS_MASK for arm, which will enable the generic runtime wrapper code to detect when firmware erroneously modifies flags over a runtime services function call.
We check all allocated flags, barring those which firmware has legitimate reason to modify (condition flags and IT state). While in practice corruption of some flags (e.g. J) would already be fatal, we include these for consistency and documentation purposes. Signed-off-by: Mark Rutland <[email protected]> Cc: Ard Biesheuvel <[email protected]> Cc: Leif Lindholm <[email protected]> Cc: Matt Fleming <[email protected]> Cc: Russell King <[email protected]> Cc: [email protected] Cc: [email protected] --- arch/arm/include/asm/efi.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h index e1461fc..b05ff68 100644 --- a/arch/arm/include/asm/efi.h +++ b/arch/arm/include/asm/efi.h @@ -17,6 +17,7 @@ #include <asm/mach/map.h> #include <asm/mmu_context.h> #include <asm/pgtable.h> +#include <asm/ptrace.h> #ifdef CONFIG_EFI void efi_init(void); @@ -33,6 +34,10 @@ int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md); __f(args); \ }) +#define ARCH_EFI_IRQ_FLAGS_MASK \ + (PSR_J_BIT | PSR_E_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT | \ + PSR_T_BIT | MODE_MASK) + static inline void efi_set_pgd(struct mm_struct *mm) { check_and_switch_context(mm, NULL); -- 1.9.1
