hvg_hcall_return_t Declarationtypedef enum hvg_hcall_return_t : uint32_t { ... } hvg_hcall_return_t; TopicsConstantsHVG_HCALL_ACCESS_DENIEDHVG_HCALL_FEAT_DISABLEDHVG_HCALL_INVALID_CODEHVG_HCALL_INVALID_PARAMETERHVG_HCALL_IO_FAILEDHVG_HCALL_SUCCESSHVG_HCALL_UNSUPPORTED