Building steal_time.c for arm64 with clang throws the following:
>> steal_time.c:130:22: error: value size does not match register size
>> specified by the constraint and modifier [-Werror,-Wasm-operand-widths]
: "=r" (ret) : "r" (func), "r" (arg) :
^
>> steal_time.c:130:34: error: value size does not match register size
>> specified by the constraint and modifier [-Werror,-Wasm-operand-widths]
: "=r" (ret) : "r" (func), "r" (arg) :
^
Silence by casting operands to 64 bits.
Signed-off-by: Oliver Upton <[email protected]>
---
tools/testing/selftests/kvm/steal_time.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/kvm/steal_time.c
b/tools/testing/selftests/kvm/steal_time.c
index ecec30865a74..eb75b31122c5 100644
--- a/tools/testing/selftests/kvm/steal_time.c
+++ b/tools/testing/selftests/kvm/steal_time.c
@@ -127,7 +127,7 @@ static int64_t smccc(uint32_t func, uint32_t arg)
"mov x1, %2\n"
"hvc #0\n"
"mov %0, x0\n"
- : "=r" (ret) : "r" (func), "r" (arg) :
+ : "=r" (ret) : "r" ((uint64_t)func), "r" ((uint64_t)arg) :
"x0", "x1", "x2", "x3");
return ret;
--
2.33.0.464.g1972c5931b-goog
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