From 1721b82c1f98f36d90e10cbd4c7f35209c0ac137 Mon Sep 17 00:00:00 2001 From: Ibai Erkiaga Date: Mon, 25 Feb 2019 10:11:45 +0000 Subject: [PATCH] arm: fix hvc call HVC call makes use of 6 mandatory arguments rather than 7 in the same way as SMC calls. The 7th argument is optional (Client ID) for both HVC and SMC but is implemented as 16-bit parameter and register R7 or W7. The aim of this patch is just fix compilation error due to an invalid asm code in the HVC call so that's why the 7th argument is removed. The issue does not report any error in a normal build as hvc_call is not used at all and is optimized by the compiler. Using -O0 triggers the error so the patch is intended to fix issues on a ongoing effor to build U-Boot with -O0. Signed-off-by: Ibai Erkiaga --- arch/arm/cpu/armv8/fwcall.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/arm/cpu/armv8/fwcall.c b/arch/arm/cpu/armv8/fwcall.c index 9957c2974b..b0aca1b72a 100644 --- a/arch/arm/cpu/armv8/fwcall.c +++ b/arch/arm/cpu/armv8/fwcall.c @@ -28,7 +28,6 @@ static void hvc_call(struct pt_regs *args) "ldr x4, %4\n" "ldr x5, %5\n" "ldr x6, %6\n" - "ldr x7, %7\n" "hvc #0\n" "str x0, %0\n" "str x1, %1\n" @@ -37,7 +36,7 @@ static void hvc_call(struct pt_regs *args) : "+m" (args->regs[0]), "+m" (args->regs[1]), "+m" (args->regs[2]), "+m" (args->regs[3]) : "m" (args->regs[4]), "m" (args->regs[5]), - "m" (args->regs[6]), "m" (args->regs[7]) + "m" (args->regs[6]) : "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", "x16", "x17"); -- 2.39.5