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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-11-24 23:46:28 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-25 09:12:51 (GMT) |
| commit | 273bee27fa9f79d94b78c83506016f2e41e78983 (patch) | |
| tree | 3325e405145be3518dec479f90a812539cc504ae /arch/x86/kernel/pci-swiotlb.c | |
| parent | be831297716036de5b24308447ecb69f1706a846 (diff) | |
| download | linux-fsl-qoriq-273bee27fa9f79d94b78c83506016f2e41e78983.tar.xz | |
x86: Fix iommu=soft boot option
iommu=soft boot option forces the kernel to use swiotlb.
( This has the side-effect of enabling the swiotlb over the
GART if this boot option is provided. This is the desired
behavior of the swiotlb boot option and works like that
for all other hw-IOMMU drivers. )
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: yinghai@kernel.org
LKML-Reference: <20091125084611O.fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/pci-swiotlb.c')
| -rw-r--r-- | arch/x86/kernel/pci-swiotlb.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c index e36e71d..e3c0a66 100644 --- a/arch/x86/kernel/pci-swiotlb.c +++ b/arch/x86/kernel/pci-swiotlb.c @@ -50,6 +50,8 @@ static struct dma_map_ops swiotlb_dma_ops = { */ int __init pci_swiotlb_init(void) { + int use_swiotlb = swiotlb | swiotlb_force; + /* don't initialize swiotlb if iommu=off (no_iommu=1) */ #ifdef CONFIG_X86_64 if (!no_iommu && max_pfn > MAX_DMA32_PFN) @@ -63,5 +65,5 @@ int __init pci_swiotlb_init(void) dma_ops = &swiotlb_dma_ops; } - return swiotlb_force; + return use_swiotlb; } |