[PATCH ARM64 v4.4 V3 40/44] arm/arm64: smccc: Make function identifiers an unsigned quantity
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2019-08-29 11:36:40
Also in:
stable
Subsystem:
secure monitor call(smc) calling convention (smccc), the rest · Maintainers:
Mark Rutland, Lorenzo Pieralisi, Sudeep Holla, Linus Torvalds
From: Marc Zyngier <redacted> commit ded4c39e93f3b72968fdb79baba27f3b83dad34c upstream. 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 <redacted> Acked-by: Ard Biesheuvel <redacted> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Ard Biesheuvel <redacted> Signed-off-by: Marc Zyngier <redacted> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- include/linux/arm-smccc.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index 1f02e4045a9e..4c45fd75db5d 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h@@ -16,6 +16,7 @@ #include <linux/linkage.h> #include <linux/types.h> +#include <uapi/linux/const.h> /* * This file provides common defines for ARM SMC Calling Convention as
@@ -23,8 +24,8 @@ * 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
--
2.21.0.rc0.269.g1a574e7a288b
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