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authorJoerg Roedel <joerg.roedel@amd.com>2009-09-01 15:53:54 +0200
committerJoerg Roedel <joerg.roedel@amd.com>2009-09-03 16:15:46 +0200
commit4751a95134e05f1172131d2001c6991d671fa58c (patch)
treef5d00703c633c39b60cfc0be568f1fdbbe3b4656 /arch/x86/kernel/amd_iommu_init.c
parenta1ca331c8aa75cd58fdf685e2e8745e1d3ec5c8f (diff)
downloadblackbird-op-linux-4751a95134e05f1172131d2001c6991d671fa58c.tar.gz
blackbird-op-linux-4751a95134e05f1172131d2001c6991d671fa58c.zip
x86/amd-iommu: Initialize passthrough mode when requested
This patch enables the passthrough mode for AMD IOMMU by running the initialization function when iommu=pt is passed on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/kernel/amd_iommu_init.c')
-rw-r--r--arch/x86/kernel/amd_iommu_init.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index c1b17e97252e..f00f489ab150 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -1242,12 +1242,18 @@ int __init amd_iommu_init(void)
if (ret)
goto free;
- ret = amd_iommu_init_dma_ops();
+ if (iommu_pass_through)
+ ret = amd_iommu_init_passthrough();
+ else
+ ret = amd_iommu_init_dma_ops();
if (ret)
goto free;
enable_iommus();
+ if (iommu_pass_through)
+ goto out;
+
printk(KERN_INFO "AMD IOMMU: device isolation ");
if (amd_iommu_isolate)
printk("enabled\n");
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