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| author |   Joerg Roedel <joerg.roedel@amd.com> | 2008-12-02 18:28:53 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-01-03 14:11:53 +0100 |
| commit | a2acfb75792511a35586db80a38b8e4701a97730 (patch) | |
| tree | e031a8dc61aa93fe3f43f86647c30f151bfa9f55 | |
| parent | AMD IOMMU: make dma_ops_free_pagetable generic (diff) | |
| download | linux-dev-a2acfb75792511a35586db80a38b8e4701a97730.tar.xz linux-dev-a2acfb75792511a35586db80a38b8e4701a97730.zip | |
AMD IOMMU: add domain id free function
Impact: add code to release a domain id
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 8a0fd3d09973..0922d5fe633c 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -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. |