Commit 22bb182c authored by Joerg Roedel's avatar Joerg Roedel
Browse files

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: default avatarJoerg Roedel <jroedel@suse.de>
parent 5fa9e7c5

drivers/iommu/iommu.c

+15 −8
Original line number Diff line number Diff line
@@ -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;

}