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    Subject[PATCH 04/14] x86/amd-iommu: Add a gneric version of amd_iommu_flush_all_devices
    Date
    This patch adds a generic variant of
    amd_iommu_flush_all_devices function which flushes only the
    DTEs for a given protection domain.

    Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
    ---
    arch/x86/kernel/amd_iommu.c | 10 ++++++++--
    1 files changed, 8 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
    index 4a54366..5265dd1 100644
    --- a/arch/x86/kernel/amd_iommu.c
    +++ b/arch/x86/kernel/amd_iommu.c
    @@ -481,13 +481,14 @@ void amd_iommu_flush_all_domains(void)
    }
    }

    -void amd_iommu_flush_all_devices(void)
    +static void flush_devices_by_domain(struct protection_domain *domain)
    {
    struct amd_iommu *iommu;
    int i;

    for (i = 0; i <= amd_iommu_last_bdf; ++i) {
    - if (amd_iommu_pd_table[i] == NULL)
    + if ((domain == NULL && amd_iommu_pd_table[i] == NULL) ||
    + (amd_iommu_pd_table[i] != domain))
    continue;

    iommu = amd_iommu_rlookup_table[i];
    @@ -499,6 +500,11 @@ void amd_iommu_flush_all_devices(void)
    }
    }

    +void amd_iommu_flush_all_devices(void)
    +{
    + flush_devices_by_domain(NULL);
    +}
    +
    /****************************************************************************
    *
    * The functions below are used the create the page table mappings for
    --
    1.6.3.3



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