DMAR_OPERATION_TIMEOUT    6 arch/ia64/include/asm/iommu.h #define DMAR_OPERATION_TIMEOUT (((cycles_t) local_cpu_data->itc_freq)*10)
DMAR_OPERATION_TIMEOUT    9 arch/x86/include/asm/iommu.h #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)