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Subject[PATCH 8/8] x86/amd-iommu: Initialize passthrough mode when requested
Date
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>
---
arch/x86/kernel/amd_iommu_init.c | 8 +++++++-
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 c1b17e9..f00f489 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");
--
1.6.3.3



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