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/* 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;
#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 */
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