Commit-ID: 207a90e5cbcdb0674c8a4b499c1407962c46f6d3 Gitweb: http://git.kernel.org/tip/207a90e5cbcdb0674c8a4b499c1407962c46f6d3 Author: Mark Rutland <[email protected]> AuthorDate: Mon, 25 Apr 2016 21:07:10 +0100 Committer: Ingo Molnar <[email protected]> CommitDate: Thu, 28 Apr 2016 11:34:12 +0200
arm/efi: Enable runtime call flag checking 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]> Signed-off-by: Matt Fleming <[email protected]> Cc: Ard Biesheuvel <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Colin Ian King <[email protected]> Cc: Leif Lindholm <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Russell King <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Will Deacon <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[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 5f273b43..a708fa1 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); @@ -34,6 +35,10 @@ int efi_set_mapping_permissions(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);
