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>
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@ -26,11 +26,8 @@
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static struct kset *iommu_group_kset;
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static DEFINE_IDA(iommu_group_ida);
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#ifdef CONFIG_IOMMU_DEFAULT_PASSTHROUGH
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static unsigned int iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY;
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#else
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static unsigned int iommu_def_domain_type = IOMMU_DOMAIN_DMA;
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#endif
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static unsigned int iommu_def_domain_type __read_mostly;
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static bool iommu_dma_strict __read_mostly = true;
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static u32 iommu_cmd_line __read_mostly;
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@ -76,7 +73,7 @@ static void iommu_set_cmd_line_dma_api(void)
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iommu_cmd_line |= IOMMU_CMD_LINE_DMA_API;
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}
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static bool __maybe_unused iommu_cmd_line_dma_api(void)
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static bool iommu_cmd_line_dma_api(void)
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{
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return !!(iommu_cmd_line & IOMMU_CMD_LINE_DMA_API);
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}
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@ -115,8 +112,18 @@ static const char *iommu_domain_type_str(unsigned int t)
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static int __init iommu_subsys_init(void)
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{
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pr_info("Default domain type: %s\n",
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iommu_domain_type_str(iommu_def_domain_type));
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bool cmd_line = iommu_cmd_line_dma_api();
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if (!cmd_line) {
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if (IS_ENABLED(CONFIG_IOMMU_DEFAULT_PASSTHROUGH))
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iommu_set_default_passthrough(false);
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else
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iommu_set_default_translated(false);
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}
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pr_info("Default domain type: %s %s\n",
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iommu_domain_type_str(iommu_def_domain_type),
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cmd_line ? "(set via kernel command line)" : "");
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return 0;
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}
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