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    Subject[PATCH 20/22] AMD IOMMU: add stats counter for domain tlb flushes
    Date
    Impact: see number of 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 8490a06..be6d107 100644
    --- a/arch/x86/kernel/amd_iommu.c
    +++ b/arch/x86/kernel/amd_iommu.c
    @@ -72,6 +72,7 @@ DECLARE_STATS_COUNTER(cnt_alloc_coherent);
    DECLARE_STATS_COUNTER(cnt_free_coherent);
    DECLARE_STATS_COUNTER(cross_page);
    DECLARE_STATS_COUNTER(domain_flush_single);
    +DECLARE_STATS_COUNTER(domain_flush_all);

    static struct dentry *stats_dir;
    static struct dentry *de_isolate;
    @@ -107,6 +108,7 @@ static void amd_iommu_stats_init(void)
    amd_iommu_stats_add(&cnt_free_coherent);
    amd_iommu_stats_add(&cross_page);
    amd_iommu_stats_add(&domain_flush_single);
    + amd_iommu_stats_add(&domain_flush_all);
    }

    #endif
    @@ -430,6 +432,8 @@ static void iommu_flush_domain(u16 domid)
    struct amd_iommu *iommu;
    struct iommu_cmd cmd;

    + INC_STATS_COUNTER(domain_flush_all);
    +
    __iommu_build_inv_iommu_pages(&cmd, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
    domid, 1, 1);

    --
    1.5.6.4



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