1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_IOMMU_H 3 #define _ASM_X86_IOMMU_H 4 5 #include <linux/acpi.h> 6 7 #include <asm/e820/api.h> 8 9 extern int force_iommu, no_iommu; 10 extern int iommu_detected; 11 12 /* 10 seconds */ 13 #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000) 14 15 static inline int __init 16 arch_rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr) 17 { 18 u64 start = rmrr->base_address; 19 u64 end = rmrr->end_address + 1; 20 21 if (e820__mapped_all(start, end, E820_TYPE_RESERVED)) 22 return 0; 23 24 pr_err(FW_BUG "No firmware reserved region can cover this RMRR [%#018Lx-%#018Lx], contact BIOS vendor for fixes\n", 25 start, end - 1); 26 return -EINVAL; 27 } 28 29 #endif /* _ASM_X86_IOMMU_H */ 30