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;
11
12/* 10 seconds */
13#define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)
14
15static inline int __init
16arch_rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr)
17{
18	u64 start = rmrr->base_address;
19	u64 end = rmrr->end_address + 1;
20	int entry_type;
21
22	entry_type = e820__get_entry_type(start, end);
23	if (entry_type == E820_TYPE_RESERVED || entry_type == E820_TYPE_NVS)
24		return 0;
25
26	pr_err(FW_BUG "No firmware reserved region can cover this RMRR [%#018Lx-%#018Lx], contact BIOS vendor for fixes\n",
27	       start, end - 1);
28	return -EINVAL;
29}
30
31#endif /* _ASM_X86_IOMMU_H */
32