| Date | Thu, 10 Jul 2008 14:41:47 +0200 | From | Joerg Roedel <> | Subject | Re: [PATCH 16/34] AMD IOMMU: add kernel command line parameters for AMD IOMMU |
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On Thu, Jul 10, 2008 at 12:04:17AM -0700, Yinghai Lu wrote: > On Thu, Jun 26, 2008 at 12:27 PM, Joerg Roedel <joerg.roedel@amd.com> wrote: > > 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; > > + } > > could use > memparse(str, &str); > > and weight...
Thanks for that hint. I wasn't aware of memparse.
Joerg
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