Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH 16/34] AMD IOMMU: add kernel command line parameters for AMD IOMMU | Date | Thu, 26 Jun 2008 21:27:52 +0200 |
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This patch adds two parameters to the kernel command line to control behavior of the AMD IOMMU.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> --- arch/x86/kernel/amd_iommu_init.c | 34 ++++++++++++++++++++++++++++++++++ 1 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c index d7a75bf..ec6f13b 100644 --- a/arch/x86/kernel/amd_iommu_init.c +++ b/arch/x86/kernel/amd_iommu_init.c @@ -789,3 +789,37 @@ void __init amd_iommu_detect(void) } } +static int __init parse_amd_iommu_options(char *str) +{ + for (; *str; ++str) { + if (strcmp(str, "off") == 0) + amd_iommu_disable = 1; + if (strcmp(str, "isolate") == 0) + amd_iommu_isolate = 1; + } + + return 1; +} + +static int __init parse_amd_iommu_size_options(char *str) +{ + for (; *str; ++str) { + if (strcmp(str, "32M") == 0) + amd_iommu_aperture_order = 25; + if (strcmp(str, "64M") == 0) + amd_iommu_aperture_order = 26; + if (strcmp(str, "128M") == 0) + amd_iommu_aperture_order = 27; + if (strcmp(str, "256M") == 0) + amd_iommu_aperture_order = 28; + if (strcmp(str, "512M") == 0) + amd_iommu_aperture_order = 29; + if (strcmp(str, "1G") == 0) + amd_iommu_aperture_order = 30; + } + + return 1; +} + +__setup("amd_iommu=", parse_amd_iommu_options); +__setup("amd_iommu_size=", parse_amd_iommu_size_options); -- 1.5.3.7
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