1 /* SPDX-License-Identifier: GPL-2.0 */ 1
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 extern int iommu_merge;
12 extern int panic_on_overflow;
13 extern bool amd_iommu_snp_en;
14
15 #ifdef CONFIG_SWIOTLB
16 extern bool x86_swiotlb_enable;
17 #else
18 #define x86_swiotlb_enable false
19 #endif
20
21 /* 10 seconds */
22 #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc
23
24 static inline int __init
25 arch_rmrr_sanity_check(struct acpi_dmar_reserv
26 {
27 u64 start = rmrr->base_address;
28 u64 end = rmrr->end_address + 1;
29 int entry_type;
30
31 entry_type = e820__get_entry_type(star
32 if (entry_type == E820_TYPE_RESERVED |
33 return 0;
34
35 pr_err(FW_BUG "No firmware reserved re
36 start, end - 1);
37 return -EINVAL;
38 }
39
40 #endif /* _ASM_X86_IOMMU_H */
41
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