AMD IOMMU: add Kconfig entry for statistic collection code

Impact: adds new Kconfig entry

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

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 249d1e0824b523e0a1e51a613a86a497649cc089..f9998d276eb39020d68701efaa968dc33c4dfd2e 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -586,6 +586,16 @@ config AMD_IOMMU
          your BIOS for an option to enable it or if you have an IVRS ACPI
          table.
 
+config AMD_IOMMU_STATS
+       bool "Export AMD IOMMU statistics to debugfs"
+       depends on AMD_IOMMU
+       select DEBUG_FS
+       help
+         This option enables code in the AMD IOMMU driver to collect various
+         statistics about whats happening in the driver and exports that
+         information to userspace via debugfs.
+         If unsure, say N.
+
 # need this always selected by IOMMU for the VIA workaround
 config SWIOTLB
        def_bool y if X86_64