40 lines
935 B
C
40 lines
935 B
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_IOMMU_H
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#define _ASM_X86_IOMMU_H
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#include <linux/acpi.h>
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#include <asm/e820/api.h>
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extern int force_iommu, no_iommu;
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extern int iommu_detected;
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extern int iommu_merge;
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extern int panic_on_overflow;
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#ifdef CONFIG_SWIOTLB
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extern bool x86_swiotlb_enable;
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#else
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#define x86_swiotlb_enable false
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#endif
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/* 10 seconds */
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#define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)
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static inline int __init
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arch_rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr)
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{
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u64 start = rmrr->base_address;
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u64 end = rmrr->end_address + 1;
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int entry_type;
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entry_type = e820__get_entry_type(start, end);
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if (entry_type == E820_TYPE_RESERVED || entry_type == E820_TYPE_NVS)
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return 0;
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pr_err(FW_BUG "No firmware reserved region can cover this RMRR [%#018Lx-%#018Lx], contact BIOS vendor for fixes\n",
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start, end - 1);
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return -EINVAL;
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}
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#endif /* _ASM_X86_IOMMU_H */
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