KVM: selftests: Add atoi_positive() and atoi_non_negative() for input validation

Many KVM selftests take command line arguments which are supposed to be
positive (>0) or non-negative (>=0). Some tests do these validation and
some missed adding the check.

Add atoi_positive() and atoi_non_negative() to validate inputs in
selftests before proceeding to use those values.

Signed-off-by: Vipin Sharma <vipinsh@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20221103191719.1559407-7-vipinsh@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h
index feae42863759..3be98e81189a 100644
--- a/tools/testing/selftests/kvm/include/test_util.h
+++ b/tools/testing/selftests/kvm/include/test_util.h
@@ -154,4 +154,20 @@ static inline void *align_ptr_up(void *x, size_t size)
 
 int atoi_paranoid(const char *num_str);
 
+static inline uint32_t atoi_positive(const char *name, const char *num_str)
+{
+	int num = atoi_paranoid(num_str);
+
+	TEST_ASSERT(num > 0, "%s must be greater than 0, got '%s'", name, num_str);
+	return num;
+}
+
+static inline uint32_t atoi_non_negative(const char *name, const char *num_str)
+{
+	int num = atoi_paranoid(num_str);
+
+	TEST_ASSERT(num >= 0, "%s must be non-negative, got '%s'", name, num_str);
+	return num;
+}
+
 #endif /* SELFTEST_KVM_TEST_UTIL_H */