[PATCH 2/2] selftests: KVM: Fix 'asm-operand-width' warnings in steal_time.c

Oliver Upton
2021-09-21T02:01:08Z

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 <oupton@google.com>
---
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