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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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c66b9906f8
dmar.o can be built in the CONFIG_INTR_REMAP=y case but iommu_calculate_agaw() is only available if VT-d is built as well. So create an inline version of iommu_calculate_agaw() for the !CONFIG_DMAR case. The iommu->agaw value wont be used in this case, but the code is cleaner (has less #ifdefs) if we have it around unconditionally. Signed-off-by: Ingo Molnar <mingo@elte.hu>
33 lines
708 B
C
33 lines
708 B
C
#ifndef _DMA_REMAPPING_H
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#define _DMA_REMAPPING_H
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/*
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* VT-d hardware uses 4KiB page size regardless of host page size.
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*/
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#define VTD_PAGE_SHIFT (12)
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#define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT)
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#define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT)
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#define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK)
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#define DMA_PTE_READ (1)
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#define DMA_PTE_WRITE (2)
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struct intel_iommu;
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struct dmar_domain;
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struct root_entry;
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extern void free_dmar_iommu(struct intel_iommu *iommu);
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#ifdef CONFIG_DMAR
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extern int iommu_calculate_agaw(struct intel_iommu *iommu);
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#else
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static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
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{
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return 0;
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}
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#endif
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extern int dmar_disabled;
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#endif
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