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| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-12-08 12:05:55 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-01-03 14:11:55 +0100 |
| commit | 6d98cd8043c13438e4ca8a9464893f0224198a30 (patch) | |
| tree | 2ffaa5b1391188fe99a306473650d3b18bb50e15 /arch/x86/kernel/amd_iommu.c | |
| parent | e275a2a0fc9e2168b15f6c7814e30b7ad58b1c7c (diff) | |
| download | lwn-6d98cd8043c13438e4ca8a9464893f0224198a30.tar.gz lwn-6d98cd8043c13438e4ca8a9464893f0224198a30.zip | |
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>
Diffstat (limited to 'arch/x86/kernel/amd_iommu.c')
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 140875b3f6ef..5d3f085289eb 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -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 |