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| author | Marc Zyngier <marc.zyngier@arm.com> | 2018-02-06 17:56:18 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2018-02-06 22:54:13 +0000 |
| commit | ded4c39e93f3b72968fdb79baba27f3b83dad34c (patch) | |
| tree | 9ac2dea288a0227d07cfd76cb7c770dfcdb565d2 | |
| parent | e78eef554a912ef6c1e0bbf97619dafbeae3339f (diff) | |
| download | linux-ded4c39e93f3b72968fdb79baba27f3b83dad34c.tar.gz linux-ded4c39e93f3b72968fdb79baba27f3b83dad34c.tar.bz2 linux-ded4c39e93f3b72968fdb79baba27f3b83dad34c.zip | |
arm/arm64: smccc: Make function identifiers an unsigned quantity
Function identifiers are a 32bit, unsigned quantity. But we never
tell so to the compiler, resulting in the following:
4ac: b26187e0 mov x0, #0xffffffff80000001
We thus rely on the firmware narrowing it for us, which is not
always a reasonable expectation.
Cc: stable@vger.kernel.org
Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | include/linux/arm-smccc.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index e1ef944ef1da..dd44d8458c04 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -14,14 +14,16 @@ #ifndef __LINUX_ARM_SMCCC_H #define __LINUX_ARM_SMCCC_H +#include <uapi/linux/const.h> + /* * This file provides common defines for ARM SMC Calling Convention as * specified in * http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html */ -#define ARM_SMCCC_STD_CALL 0 -#define ARM_SMCCC_FAST_CALL 1 +#define ARM_SMCCC_STD_CALL _AC(0,U) +#define ARM_SMCCC_FAST_CALL _AC(1,U) #define ARM_SMCCC_TYPE_SHIFT 31 #define ARM_SMCCC_SMC_32 0 |