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| author |   Joerg Roedel <joerg.roedel@amd.com> | 2009-05-22 12:40:54 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-05-28 18:18:33 +0200 |
| commit | 47bccd6bb2b866449d3ecf2ba350ac1c7473b2b8 (patch) | |
| tree | 966614593b32453d4d75db4c2df1e9f4d79d144b /arch/x86/kernel/amd_iommu.c | |
| parent | amd-iommu: don't preallocate page tables with CONFIG_IOMMU_STRESS (diff) | |
| download | linux-dev-47bccd6bb2b866449d3ecf2ba350ac1c7473b2b8.tar.xz linux-dev-47bccd6bb2b866449d3ecf2ba350ac1c7473b2b8.zip | |
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>
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 33434c497a6a..04ff5ec4ac0e 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; |