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arm/arm64: smccc-1.1: Make return values unsigned long

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An unfortunate consequence of having a strong typing for the input
values to the SMC call is that it also affects the type of the
return values, limiting r0 to 32 bits and r{1,2,3} to whatever
was passed as an input.

Let's turn everything into "unsigned long", which satisfies the
requirements of both architectures, and allows for the full
range of return values.

Reported-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Marc Zyngier 2018-08-24 15:08:29 +01:00 committed by Will Deacon
parent afce0cc9ad
commit 1d8f574708
1 changed files with 10 additions and 10 deletions
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20
include/linux/arm-smccc.h
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@ -199,31 +199,31 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
#define __declare_arg_0(a0, res) \
struct arm_smccc_res *___res = res; \
register u32 r0 asm("r0") = a0; \
register unsigned long r0 asm("r0") = (u32)a0; \
register unsigned long r1 asm("r1"); \
register unsigned long r2 asm("r2"); \
register unsigned long r3 asm("r3")
#define __declare_arg_1(a0, a1, res) \
struct arm_smccc_res *___res = res; \
register u32 r0 asm("r0") = a0; \
register typeof(a1) r1 asm("r1") = a1; \
register unsigned long r0 asm("r0") = (u32)a0; \
register unsigned long r1 asm("r1") = a1; \
register unsigned long r2 asm("r2"); \
register unsigned long r3 asm("r3")
#define __declare_arg_2(a0, a1, a2, res) \
struct arm_smccc_res *___res = res; \
register u32 r0 asm("r0") = a0; \
register typeof(a1) r1 asm("r1") = a1; \
register typeof(a2) r2 asm("r2") = a2; \
register unsigned long r0 asm("r0") = (u32)a0; \
register unsigned long r1 asm("r1") = a1; \
register unsigned long r2 asm("r2") = a2; \
register unsigned long r3 asm("r3")
#define __declare_arg_3(a0, a1, a2, a3, res) \
struct arm_smccc_res *___res = res; \
register u32 r0 asm("r0") = a0; \
register typeof(a1) r1 asm("r1") = a1; \
register typeof(a2) r2 asm("r2") = a2; \
register typeof(a3) r3 asm("r3") = a3
register unsigned long r0 asm("r0") = (u32)a0; \
register unsigned long r1 asm("r1") = a1; \
register unsigned long r2 asm("r2") = a2; \
register unsigned long r3 asm("r3") = a3
#define __declare_arg_4(a0, a1, a2, a3, a4, res) \
__declare_arg_3(a0, a1, a2, a3, res); \