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authorMarc Zyngier <marc.zyngier@arm.com>2019-11-08 15:35:16 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-11-10 13:21:20 +0300
commit36329b1d312e84a7a1e70f757a8993a3277e67ba (patch)
treebeca014f59ba9d78fa2a2926d5f9dda51a2e8ecc /include/linux/arm-smccc.h
parent2217fa9f88753f455f948e89a21f7b5e882809e1 (diff)
downloadlinux-36329b1d312e84a7a1e70f757a8993a3277e67ba.tar.xz
arm/arm64: smccc: Make function identifiers an unsigned quantity
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 <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> Signed-off-by: Mark Rutland <mark.rutland@arm.com> [v4.9 backport] Tested-by: Greg Hackmann <ghackmann@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/arm-smccc.h')
-rw-r--r--include/linux/arm-smccc.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index f2416b58367d..82e1f3ae4010 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