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    Subject[PATCH 19/22] AMD IOMMU: add stats counter for single iommu domain tlb flushes
    Date
    Impact: see number of single iommu domain tlb flushes in debugfs

    Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
    ---
    arch/x86/kernel/amd_iommu.c | 4 ++++
    1 files changed, 4 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
    index 02e8c18..8490a06 100644
    --- a/arch/x86/kernel/amd_iommu.c
    +++ b/arch/x86/kernel/amd_iommu.c
    @@ -71,6 +71,7 @@ DECLARE_STATS_COUNTER(cnt_unmap_sg);
    DECLARE_STATS_COUNTER(cnt_alloc_coherent);
    DECLARE_STATS_COUNTER(cnt_free_coherent);
    DECLARE_STATS_COUNTER(cross_page);
    +DECLARE_STATS_COUNTER(domain_flush_single);

    static struct dentry *stats_dir;
    static struct dentry *de_isolate;
    @@ -105,6 +106,7 @@ static void amd_iommu_stats_init(void)
    amd_iommu_stats_add(&cnt_alloc_coherent);
    amd_iommu_stats_add(&cnt_free_coherent);
    amd_iommu_stats_add(&cross_page);
    + amd_iommu_stats_add(&domain_flush_single);
    }

    #endif
    @@ -412,6 +414,8 @@ static void iommu_flush_tlb(struct amd_iommu *iommu, u16 domid)
    {
    u64 address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS;

    + INC_STATS_COUNTER(domain_flush_single);
    +
    iommu_queue_inv_iommu_pages(iommu, address, domid, 0, 1);
    }

    --
    1.5.6.4



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