linux-kernel - [PATCH 37/40] arm64/efi: Enable runtime call flag checking

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Message-Id: <1461614832-17633-38-git-send-email-matt@codeblueprint.co.uk>
Date:	Mon, 25 Apr 2016 21:07:09 +0100
From:	Matt Fleming <matt@...eblueprint.co.uk>
To:	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H . Peter Anvin" <hpa@...or.com>
Cc:	Mark Rutland <mark.rutland@....com>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Dan Williams <dan.j.williams@...el.com>,
	Leif Lindholm <leif.lindholm@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	Will Deacon <will.deacon@....com>
Subject: [PATCH 37/40] arm64/efi: Enable runtime call flag checking

From: Mark Rutland <mark.rutland@....com>

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@....com>
Acked-by: Will Deacon <will.deacon@....com>
Cc: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Leif Lindholm <leif.lindholm@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-efi@...r.kernel.org
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Russell King <linux@....linux.org.uk>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Matt Fleming <matt@...eblueprint.co.uk>
---
 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 cfd4ae2e46c0..622db3c6474e 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 */
 
 /*
-- 
2.7.3