From 5fa9e7c5fa50f27afd71f2f6373179739bfa4034 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Mon, 19 Aug 2019 15:22:53 +0200 Subject: iommu: Print default domain type on boot Introduce a subsys_initcall for IOMMU code and use it to print the default domain type at boot. Signed-off-by: Joerg Roedel --- drivers/iommu/iommu.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) (limited to 'drivers/iommu/iommu.c') diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 544f44fc08e4..31a66c4600bc 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"; + } +} + +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; } -- cgit