[linux-2.6-block.git] / arch / x86 / include / asm / iommu.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_IOMMU_H
#define _ASM_X86_IOMMU_H

#include <linux/acpi.h>

#include <asm/e820/api.h>

extern int force_iommu, no_iommu;
extern int iommu_detected;
extern int iommu_merge;
extern int panic_on_overflow;
extern bool amd_iommu_snp_en;

#ifdef CONFIG_SWIOTLB
extern bool x86_swiotlb_enable;
#else
#define x86_swiotlb_enable false
#endif

/* 10 seconds */
#define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)

static inline int __init
arch_rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr)
{
	u64 start = rmrr->base_address;
	u64 end = rmrr->end_address + 1;
	int entry_type;

	entry_type = e820__get_entry_type(start, end);
	if (entry_type == E820_TYPE_RESERVED || entry_type == E820_TYPE_NVS)
		return 0;

	pr_err(FW_BUG "No firmware reserved region can cover this RMRR [%#018Lx-%#018Lx], contact BIOS vendor for fixes\n",
	       start, end - 1);
	return -EINVAL;
}

#endif /* _ASM_X86_IOMMU_H */
Commit	Line	Data
	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	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_khz101000)
	23
	24	static inline int __init
	25	arch_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 */