Commit 4f2ed183 authored by Lu Baolu's avatar Lu Baolu Committed by Joerg Roedel
Browse files

iommu/vt-d: Move page table helpers into header 



So that they could also be used in other source files.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Liu Yi L <yi.l.liu@intel.com>
Cc: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: default avatarAshok Raj <ashok.raj@intel.com>
Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 0bbeb01a

drivers/iommu/intel-iommu.c

+0 −43
Original line number Original line Diff line number Diff line
@@ -290,49 +290,6 @@ static inline void context_clear_entry(struct context_entry *context) 
	context->hi = 0;

	context->hi = 0;

}

}





/*

 * 0: readable

 * 1: writable

 * 2-6: reserved

 * 7: super page

 * 8-10: available

 * 11: snoop behavior

 * 12-63: Host physcial address

 */

struct dma_pte {

	u64 val;

};



static inline void dma_clear_pte(struct dma_pte *pte)

{

	pte->val = 0;

}



static inline u64 dma_pte_addr(struct dma_pte *pte)

{

#ifdef CONFIG_64BIT

	return pte->val & VTD_PAGE_MASK;

#else

	/* Must have a full atomic 64-bit read */

	return  __cmpxchg64(&pte->val, 0ULL, 0ULL) & VTD_PAGE_MASK;

#endif

}



static inline bool dma_pte_present(struct dma_pte *pte)

{

	return (pte->val & 3) != 0;

}



static inline bool dma_pte_superpage(struct dma_pte *pte)

{

	return (pte->val & DMA_PTE_LARGE_PAGE);

}



static inline int first_pte_in_page(struct dma_pte *pte)

{

	return !((unsigned long)pte & ~VTD_PAGE_MASK);

}



/*

/*

 * This domain is a statically identity mapping domain.

 * This domain is a statically identity mapping domain.

 *	1. This domain creats a static 1:1 mapping to all usable memory.

 *	1. This domain creats a static 1:1 mapping to all usable memory.

include/linux/intel-iommu.h

+43 −0
Original line number Original line Diff line number Diff line
@@ -590,6 +590,49 @@ static inline void __iommu_flush_cache( 
		clflush_cache_range(addr, size);

		clflush_cache_range(addr, size);

}

}





/*

 * 0: readable

 * 1: writable

 * 2-6: reserved

 * 7: super page

 * 8-10: available

 * 11: snoop behavior

 * 12-63: Host physcial address

 */

struct dma_pte {

	u64 val;

};



static inline void dma_clear_pte(struct dma_pte *pte)

{

	pte->val = 0;

}



static inline u64 dma_pte_addr(struct dma_pte *pte)

{

#ifdef CONFIG_64BIT

	return pte->val & VTD_PAGE_MASK;

#else

	/* Must have a full atomic 64-bit read */

	return  __cmpxchg64(&pte->val, 0ULL, 0ULL) & VTD_PAGE_MASK;

#endif

}



static inline bool dma_pte_present(struct dma_pte *pte)

{

	return (pte->val & 3) != 0;

}



static inline bool dma_pte_superpage(struct dma_pte *pte)

{

	return (pte->val & DMA_PTE_LARGE_PAGE);

}



static inline int first_pte_in_page(struct dma_pte *pte)

{

	return !((unsigned long)pte & ~VTD_PAGE_MASK);

}



extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);

extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);

extern int dmar_find_matched_atsr_unit(struct pci_dev *dev);

extern int dmar_find_matched_atsr_unit(struct pci_dev *dev);

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