1#ifndef _ASM_X86_IOMMU_H
 2#define _ASM_X86_IOMMU_H
 3
 4extern struct dma_map_ops nommu_dma_ops;
 
 
 
 5extern int force_iommu, no_iommu;
 6extern int iommu_detected;
 7extern int iommu_pass_through;
 
 
 
 
 
 
 
 8
 9/* 10 seconds */
10#define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
11
12#endif /* _ASM_X86_IOMMU_H */

 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;
13
14#ifdef CONFIG_SWIOTLB
15extern bool x86_swiotlb_enable;
16#else
17#define x86_swiotlb_enable false
18#endif
19
20/* 10 seconds */
21#define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)
22
23static inline int __init
24arch_rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr)
25{
26	u64 start = rmrr->base_address;
27	u64 end = rmrr->end_address + 1;
28	int entry_type;
29
30	entry_type = e820__get_entry_type(start, end);
31	if (entry_type == E820_TYPE_RESERVED || entry_type == E820_TYPE_NVS)
32		return 0;
33
34	pr_err(FW_BUG "No firmware reserved region can cover this RMRR [%#018Lx-%#018Lx], contact BIOS vendor for fixes\n",
35	       start, end - 1);
36	return -EINVAL;
37}
38
39#endif /* _ASM_X86_IOMMU_H */