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SubjectRe: [PATCH 16/34] AMD IOMMU: add kernel command line parameters for AMD IOMMU
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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