[PATCH 1/2] iommu/amd: Adding new command line option "amd-iommu=verbose"

[<suravee.suthikulpanit@amd.com>]

From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>

Adding new command line option "amd-iommu=verbose" to allow verbose print out
in dmesg.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
---
 drivers/iommu/amd_iommu_init.c  |    4 ++++
 drivers/iommu/amd_iommu_types.h |    2 ++
 2 files changed, 6 insertions(+)

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index e3c2d74..1c8770e 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -157,6 +157,8 @@ bool amd_iommu_v2_present __read_mostly;
 
 bool amd_iommu_force_isolation __read_mostly;
 
+bool amd_iommu_verbose __read_mostly;
+
 /*
  * List of protection domains - used during resume
  */
@@ -2092,6 +2094,8 @@ static int __init parse_amd_iommu_options(char *str)
 			amd_iommu_disabled = true;
 		if (strncmp(str, "force_isolation", 15) == 0)
 			amd_iommu_force_isolation = true;
+		if (strncmp(str, "verbose", 7) == 0)
+			amd_iommu_verbose = true;
 	}
 
 	return 1;
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index e38ab43..9ade4f9 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -694,6 +694,8 @@ extern bool amd_iommu_v2_present;
 
 extern bool amd_iommu_force_isolation;
 
+extern bool amd_iommu_verbose;
+
 /* Max levels of glxval supported */
 extern int amd_iommu_max_glx_val;
 
-- 
1.7.10.4