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| author | Joerg Roedel <joerg.roedel@amd.com> | 2009-05-22 12:27:53 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-05-28 18:17:13 +0200 |
| commit | fe16f088a88fb73161bba8784375c829f7e87b54 (patch) | |
| tree | 6d581b943eb397d68bf241f5a3cffcf385e8f364 /arch/x86/kernel/amd_iommu.c | |
| parent | d9cfed925448f097ec7faab80d903eb7e5f99712 (diff) | |
| download | lwn-fe16f088a88fb73161bba8784375c829f7e87b54.tar.gz lwn-fe16f088a88fb73161bba8784375c829f7e87b54.zip | |
amd-iommu: disable round-robin allocator for CONFIG_IOMMU_STRESS
Disabling the round-robin allocator results in reusing the same
dma-addresses again very fast. This is a good test if the iotlb flushing
is working correctly.
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 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 31d56c36010a..543822b39a84 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -783,6 +783,11 @@ static unsigned long dma_ops_alloc_addresses(struct device *dev, { unsigned long address; +#ifdef CONFIG_IOMMU_STRESS + dom->next_address = 0; + dom->need_flush = true; +#endif + address = dma_ops_area_alloc(dev, dom, pages, align_mask, dma_mask, dom->next_address); |