1 #ifndef _ASM_X86_IOMMU_H 2 #define _ASM_X86_IOMMU_H 3 4 extern struct dma_map_ops nommu_dma_ops; 5 extern int force_iommu, no_iommu; 6 extern int iommu_detected; 7 extern int iommu_pass_through; 8 9 /* 10 seconds */ 10 #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000) 11 12 #endif /* _ASM_X86_IOMMU_H */ 13