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Subject[PATCH 10/12] amd-iommu: disable round-robin allocator for CONFIG_IOMMU_STRESS
Date
[ impact: put high load on iommu tlb to find stale entry bugs ]

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
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);

--
1.6.3.1



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