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Commit a2acfb75 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add domain id free function 



Impact: add code to release a domain id

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 86db2e5d

arch/x86/kernel/amd_iommu.c

+12 −0
Original line number Diff line number Diff line
@@ -571,6 +571,18 @@ static u16 domain_id_alloc(void) 
	return id;

}



#ifdef CONFIG_IOMMU_API

static void domain_id_free(int id)

{

	unsigned long flags;



	write_lock_irqsave(&amd_iommu_devtable_lock, flags);

	if (id > 0 && id < MAX_DOMAIN_ID)

		__clear_bit(id, amd_iommu_pd_alloc_bitmap);

	write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);

}

#endif



/*

 * Used to reserve address ranges in the aperture (e.g. for exclusion

 * ranges.