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    SubjectRe: [PATCH 0/6] AMD IOMMU updates
    On Fri, 4 Jul 2008 11:52:13 +0200
    Ingo Molnar <> wrote:

    > * Joerg Roedel <> wrote:
    > > Hi,
    > >
    > > this series of patches contain some updates to the AMD IOMMU code
    > > currently in tip/master. The updates address some objections discussed
    > > on the initial patches and also contain optimization and small code
    > > cleanup. The code with these updates is tested on real hardware under
    > > load and showed no problems.
    > applied to tip/x86/amd-iommu and pushed that topic out, thanks Joerg.
    > also, i've integrated it into tip/master as well (will push that out
    > after some testing).
    > The IOMMU driver code seems to be getting into good shape, so i've also
    > added the topic to auto-x86-next, which means it will go into linux-next
    > on the next iteration (in 1-2 days). Does anyone see any remaining
    > problems?

    Not a showstopper but I like to see the cleanups of the kernel
    parameters, as I said before. The AMD IOMMU has two parameters,
    amd_iommu=isolate and amd_iommu_size=32M|64M|128M|256M|512M|1G

    The former might be useful for the VT-d. The latter is useful for most
    of the IOMMU drivers. So I think that it would be better to make them
    common parameters.

    And if we can change the existing kernel parameters, I think that it
    would be better to convert some of the x86 IOMMU parameters to common

    BTW, "[PATCH 4/6] AMD IOMMU: honor iommu=off instead of amd_iommu=off"
    patch in auto-x86-next needs update the kernel parameter.

    From: FUJITA Tomonori <>
    Subject: [PATCH] AMD IOMMU: fix kernel parameter

    amd_iommu=off was replaced with a common parameter, iommu=off.

    Signed-off-by: FUJITA Tomonori <>
    Documentation/kernel-parameters.txt | 1 -
    1 files changed, 0 insertions(+), 1 deletions(-)

    diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
    index cd98762..1a6bb46 100644
    --- a/Documentation/kernel-parameters.txt
    +++ b/Documentation/kernel-parameters.txt
    @@ -274,7 +274,6 @@ and is between 256 and 4096 characters. It is defined in the file
    amd_iommu= [HW,X86-84]
    Pass parameters to the AMD IOMMU driver in the system.
    Possible values are:
    - off - disable the driver for AMD IOMMU
    isolate - enable device isolation (each device, as far
    as possible, will get its own protection

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