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
9extern int force_iommu, no_iommu;
10extern int iommu_detected;
11extern int iommu_merge;
12extern int panic_on_overflow;
13extern bool amd_iommu_snp_en;
14
15#ifdef CONFIG_SWIOTLB
16extern 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_khz*10*1000)
23
24static inline int __init
25arch_rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr)
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(start, end);
32 if (entry_type == E820_TYPE_RESERVED || entry_type == E820_TYPE_NVS)
33 return 0;
34
35 pr_err(FW_BUG "No firmware reserved region can cover this RMRR [%#018Lx-%#018Lx], contact BIOS vendor for fixes\n",
36 start, end - 1);
37 return -EINVAL;
38}
39
40#endif /* _ASM_X86_IOMMU_H */
41