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authorIbai Erkiaga <ibai.erkiaga-elorza@xilinx.com>2019-02-25 10:11:45 +0000
committerTom Rini <trini@konsulko.com>2019-04-22 18:13:22 -0400
commit1721b82c1f98f36d90e10cbd4c7f35209c0ac137 (patch)
tree5200435f8adc1d7625d7966997e30676eacede53 /arch/arm/cpu/armv8
parent5e218862b78068e32955e5b17b8dbbc941d71054 (diff)
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 <ibai.erkiaga-elorza@xilinx.com>
Diffstat (limited to 'arch/arm/cpu/armv8')
-rw-r--r--arch/arm/cpu/armv8/fwcall.c3
1 files changed, 1 insertions, 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");