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Commit 6d98cd80 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add domain cleanup helper function 



Impact: add a function to remove all devices from a domain

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent e275a2a0

arch/x86/kernel/amd_iommu.c

+28 −0
Original line number Diff line number Diff line
@@ -1579,3 +1579,31 @@ free_domains: 


	return ret;

}



/*****************************************************************************

 *

 * The following functions belong to the exported interface of AMD IOMMU

 *

 * This interface allows access to lower level functions of the IOMMU

 * like protection domain handling and assignement of devices to domains

 * which is not possible with the dma_ops interface.

 *

 *****************************************************************************/



#ifdef CONFIG_IOMMU_API



static void cleanup_domain(struct protection_domain *domain)

{

	unsigned long flags;

	u16 devid;



	write_lock_irqsave(&amd_iommu_devtable_lock, flags);



	for (devid = 0; devid <= amd_iommu_last_bdf; ++devid)

		if (amd_iommu_pd_table[devid] == domain)

			__detach_device(domain, devid);



	write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);

}



#endif