AMD IOMMU: add stats counter for unmap_single requests
Impact: see number of unmap_single requests in debugfs
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index ef37786..71646c8 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -66,6 +66,7 @@
DECLARE_STATS_COUNTER(compl_wait);
DECLARE_STATS_COUNTER(cnt_map_single);
+DECLARE_STATS_COUNTER(cnt_unmap_single);
static struct dentry *stats_dir;
static struct dentry *de_isolate;
@@ -94,6 +95,7 @@
amd_iommu_stats_add(&compl_wait);
amd_iommu_stats_add(&cnt_map_single);
+ amd_iommu_stats_add(&cnt_unmap_single);
}
#endif
@@ -1321,6 +1323,8 @@
struct protection_domain *domain;
u16 devid;
+ INC_STATS_COUNTER(cnt_unmap_single);
+
if (!check_device(dev) ||
!get_device_resources(dev, &iommu, &domain, &devid))
/* device not handled by any AMD IOMMU */