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amd-iommu: don't free dma adresses below 512MB with CONFIG_IOMMU_STRESS 

This will test the automatic aperture enlargement code. This is
important because only very few devices will ever trigger this code
path. So force it under CONFIG_IOMMU_STRESS.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-05-22 12:40:54 +02:00
parent f5e9705c64
commit 47bccd6bb2
1 changed files with 5 additions and 0 deletions
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5
arch/x86/kernel/amd_iommu.c
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@ -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;