Commit-ID: fe16f088a88fb73161bba8784375c829f7e87b54
Gitweb: http://git.kernel.org/tip/fe16f088a88fb73161bba8784375c829f7e87b54
Author: Joerg Roedel <joerg.roedel@xxxxxxx>
AuthorDate: Fri, 22 May 2009 12:27:53 +0200
Committer: Joerg Roedel <joerg.roedel@xxxxxxx>
CommitDate: Thu, 28 May 2009 18:17:13 +0200
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@xxxxxxx>
---
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 31d56c3..543822b 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);
--
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