AMD IOMMU: add stats counter for domain tlb flushes

Impact: see number of domain tlb flushes in debugfs

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index e99022d3a394..a897c7246dca 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -73,6 +73,7 @@ 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;
@@ -108,6 +109,7 @@ 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
@@ -431,6 +433,8 @@ 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);