[tip:efi/core] arm64/efi: Enable runtime call flag checking

[tip-bot for Mark Rutland]

Commit-ID:  ee6cab5d4aba1df12e0386d22c5a1c4e71d34b31
Gitweb:     http://git.kernel.org/tip/ee6cab5d4aba1df12e0386d22c5a1c4e71d34b31
Author:     Mark Rutland <mark.rutland@xxxxxxx>
AuthorDate: Mon, 25 Apr 2016 21:07:09 +0100
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 28 Apr 2016 11:34:11 +0200

arm64/efi: Enable runtime call flag checking

Define ARCH_EFI_IRQ_FLAGS_MASK for arm64, which will enable the generic
runtime wrapper code to detect when firmware erroneously modifies flags
over a runtime services function call.

Signed-off-by: Mark Rutland <mark.rutland@xxxxxxx>
Signed-off-by: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
Acked-by: Will Deacon <will.deacon@xxxxxxx>
Cc: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Leif Lindholm <leif.lindholm@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-efi@xxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1461614832-17633-38-git-send-email-matt@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/arm64/include/asm/efi.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
index cfd4ae2..622db3c 100644
--- a/arch/arm64/include/asm/efi.h
+++ b/arch/arm64/include/asm/efi.h
@@ -4,6 +4,7 @@
 #include <asm/io.h>
 #include <asm/mmu_context.h>
 #include <asm/neon.h>
+#include <asm/ptrace.h>
 #include <asm/tlbflush.h>
 
 #ifdef CONFIG_EFI
@@ -35,6 +36,8 @@ int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
 	kernel_neon_end();						\
 })
 
+#define ARCH_EFI_IRQ_FLAGS_MASK (PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT)
+
 /* arch specific definitions used by the stub code */
 
 /*