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| author | Andi Kleen <ak@suse.de> | 2006-07-29 21:42:49 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-29 20:59:55 -0700 |
| commit | 65f87d8a8a6e1b560c61951d0a68ed80f7c8ff19 (patch) | |
| tree | f3f189827eaca620020d3742a347f2be5911c5cf /arch/x86_64/kernel/pci-swiotlb.c | |
| parent | 355540f3338e1408dac98413f05d612a76d4f5e3 (diff) | |
| download | blackbird-op-linux-65f87d8a8a6e1b560c61951d0a68ed80f7c8ff19.tar.gz blackbird-op-linux-65f87d8a8a6e1b560c61951d0a68ed80f7c8ff19.zip | |
[PATCH] x86_64: Fix swiotlb=force
It was broken before. But having it is important as possible hardware
bug workaround.
And previously there was no way to force swiotlb if there is another IOMMU.
Side effect is that iommu=force won't force swiotlb anymore even if there
isn't another IOMMU.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/pci-swiotlb.c')
| -rw-r--r-- | arch/x86_64/kernel/pci-swiotlb.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86_64/kernel/pci-swiotlb.c b/arch/x86_64/kernel/pci-swiotlb.c index ebdb77fe2057..6a55f87ba97f 100644 --- a/arch/x86_64/kernel/pci-swiotlb.c +++ b/arch/x86_64/kernel/pci-swiotlb.c @@ -31,9 +31,10 @@ struct dma_mapping_ops swiotlb_dma_ops = { void pci_swiotlb_init(void) { /* don't initialize swiotlb if iommu=off (no_iommu=1) */ - if (!iommu_detected && !no_iommu && - (end_pfn > MAX_DMA32_PFN || force_iommu)) + if (!iommu_detected && !no_iommu && end_pfn > MAX_DMA32_PFN) swiotlb = 1; + if (swiotlb_force) + swiotlb = 1; if (swiotlb) { printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n"); swiotlb_init(); |
