Hi,
On 8/14/19 9:38 PM, Joerg Roedel wrote:
From: Joerg Roedel <jroedel@xxxxxxx>
Introduce a subsys_initcall for IOMMU code and use it to
print the default domain type at boot.
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
---
drivers/iommu/iommu.c | 30 +++++++++++++++++++++++++++++-
1 file changed, 29 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index e1feb4061b8b..233bc22b487e 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -93,12 +93,40 @@ struct iommu_group_attribute iommu_group_attr_##_name = \
static LIST_HEAD(iommu_device_list);
static DEFINE_SPINLOCK(iommu_device_lock);
+/*
+ * Use a function instead of an array here because the domain-type is a
+ * bit-field, so an array would waste memory.
+ */
+static const char *iommu_domain_type_str(unsigned int t)
+{
+ switch (t) {
+ case IOMMU_DOMAIN_BLOCKED:
+ return "Blocked";
+ case IOMMU_DOMAIN_IDENTITY:
+ return "Passthrough";
+ case IOMMU_DOMAIN_UNMANAGED:
+ return "Unmanaged";
+ case IOMMU_DOMAIN_DMA:
+ return "Translated";
+ default:
+ return "Unknown";
+ }
+}
Run scripts/checkpatch.pl:
ERROR: switch and case should be at the same indent
#28: FILE: drivers/iommu/iommu.c:102:
+ switch (t) {
+ case IOMMU_DOMAIN_BLOCKED:
[...]
+ case IOMMU_DOMAIN_IDENTITY:
[...]
+ case IOMMU_DOMAIN_UNMANAGED:
[...]
+ case IOMMU_DOMAIN_DMA:
[...]
+ default:
Best regards,
Lu Baolu
+
+static int __init iommu_subsys_init(void)
+{
+ pr_info("Default domain type: %s\n",
+ iommu_domain_type_str(iommu_def_domain_type));
+
+ return 0;
+}
+subsys_initcall(iommu_subsys_init);
+
int iommu_device_register(struct iommu_device *iommu)
{
spin_lock(&iommu_device_lock);
list_add_tail(&iommu->list, &iommu_device_list);
spin_unlock(&iommu_device_lock);
-
return 0;
}
