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| author |   Joerg Roedel <joerg.roedel@amd.com> | 2008-06-26 21:27:52 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-06-27 10:12:14 +0200 |
| commit | 918ad6c54d107ccfc4ccaa3a54b97437467fb58a (patch) | |
| tree | 33b040a00354063f8d65634d094c5ec72cf5430a /arch/x86/kernel/amd_iommu_init.c | |
| parent | x86, AMD IOMMU: add early detection code (diff) | |
| download | linux-dev-918ad6c54d107ccfc4ccaa3a54b97437467fb58a.tar.xz linux-dev-918ad6c54d107ccfc4ccaa3a54b97437467fb58a.zip | |
x86, AMD IOMMU: add kernel command line parameters for AMD IOMMU
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>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/amd_iommu_init.c')
| -rw-r--r-- | 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 d7a75bf0f7e6..ec6f13b69d53 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); |