summaryrefslogtreecommitdiff
path: root/drivers/iommu
diff options
context:
space:
mode:
authorJoerg Roedel <jroedel@suse.de>2019-08-19 15:22:54 +0200
committerJoerg Roedel <jroedel@suse.de>2019-08-23 10:11:28 +0200
commit22bb182c839d8ef6c08cf548feb0451c429216d8 (patch)
tree44f7e980127aed6bc8c2ed078714270ecfa440e7 /drivers/iommu
parent5fa9e7c5fa50f27afd71f2f6373179739bfa4034 (diff)
iommu: Set default domain type at runtime
Set the default domain-type at runtime, not at compile-time. This keeps default domain type setting in one place when we have to change it at runtime. Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/iommu.c23
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 31a66c4600bc..9ad1b0af2306 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -26,11 +26,8 @@
static struct kset *iommu_group_kset;
static DEFINE_IDA(iommu_group_ida);
-#ifdef CONFIG_IOMMU_DEFAULT_PASSTHROUGH
-static unsigned int iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY;
-#else
-static unsigned int iommu_def_domain_type = IOMMU_DOMAIN_DMA;
-#endif
+
+static unsigned int iommu_def_domain_type __read_mostly;
static bool iommu_dma_strict __read_mostly = true;
static u32 iommu_cmd_line __read_mostly;
@@ -76,7 +73,7 @@ static void iommu_set_cmd_line_dma_api(void)
iommu_cmd_line |= IOMMU_CMD_LINE_DMA_API;
}
-static bool __maybe_unused iommu_cmd_line_dma_api(void)
+static bool iommu_cmd_line_dma_api(void)
{
return !!(iommu_cmd_line & IOMMU_CMD_LINE_DMA_API);
}
@@ -115,8 +112,18 @@ static const char *iommu_domain_type_str(unsigned int t)
static int __init iommu_subsys_init(void)
{
- pr_info("Default domain type: %s\n",
- iommu_domain_type_str(iommu_def_domain_type));
+ bool cmd_line = iommu_cmd_line_dma_api();
+
+ if (!cmd_line) {
+ if (IS_ENABLED(CONFIG_IOMMU_DEFAULT_PASSTHROUGH))
+ iommu_set_default_passthrough(false);
+ else
+ iommu_set_default_translated(false);
+ }
+
+ pr_info("Default domain type: %s %s\n",
+ iommu_domain_type_str(iommu_def_domain_type),
+ cmd_line ? "(set via kernel command line)" : "");
return 0;
}