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AMD IOMMU: add domain cleanup helper function 

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

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-08 12:05:55 +01:00
parent e275a2a0fc
commit 6d98cd8043
1 changed files with 28 additions and 0 deletions
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28
arch/x86/kernel/amd_iommu.c
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@ -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