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Subject[PATCH 12/12] amd-iommu: don't free dma adresses below 512MB with CONFIG_IOMMU_STRESS
Date
[ impact: stress test automatic aperture enlargement code ]

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 33434c4..04ff5ec 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -824,6 +824,11 @@ static void dma_ops_free_addresses(struct dma_ops_domain *dom,

BUG_ON(i >= APERTURE_MAX_RANGES || range == NULL);

+#ifdef CONFIG_IOMMU_STRESS
+ if (i < 4)
+ return;
+#endif
+
if (address >= dom->next_address)
dom->need_flush = true;

--
1.6.3.1



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