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    Subject[PATCH 13/21] AMD IOMMU: add domain cleanup helper function
    Date
    Impact: add a function to remove all devices from a domain

    Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
    ---
    arch/x86/kernel/amd_iommu.c | 14 ++++++++++++++
    1 files changed, 14 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
    index 47158e3..26b929b 100644
    --- a/arch/x86/kernel/amd_iommu.c
    +++ b/arch/x86/kernel/amd_iommu.c
    @@ -1510,3 +1510,17 @@ static void detach_device(struct protection_domain *domain, u16 devid)
    __detach_device(domain, devid);
    write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
    }
    +
    +static void cleanup_domain(struct protection_domain *domain)
    +{
    + unsigned long flags;
    + u16 devid;
    +
    + write_lock_irqsave(&amd_iommu_devtable_lock, flags);
    +
    + for (devid = 0; devid <= amd_iommu_last_bdf; ++devid)
    + if (amd_iommu_pd_table[devid] == domain)
    + __detach_device(domain, devid);
    +
    + write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
    +}
    --
    1.5.6.4



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