1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_IOMMU_H 3 #define _ASM_X86_IOMMU_H 4 5 extern const struct dma_map_ops nommu_dma_ops; 6 extern int force_iommu, no_iommu; 7 extern int iommu_detected; 8 extern int iommu_pass_through; 9 10 int x86_dma_supported(struct device *dev, u64 mask); 11 12 /* 10 seconds */ 13 #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000) 14 15 #endif /* _ASM_X86_IOMMU_H */ 16