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| author | Joerg Roedel <jroedel@suse.de> | 2019-08-19 15:22:54 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-08-23 10:11:28 +0200 |
| commit | 22bb182c839d8ef6c08cf548feb0451c429216d8 (patch) | |
| tree | 44f7e980127aed6bc8c2ed078714270ecfa440e7 /drivers/iommu/iommu.c | |
| parent | iommu: Print default domain type on boot (diff) | |
| download | linux-22bb182c839d8ef6c08cf548feb0451c429216d8.tar.xz linux-22bb182c839d8ef6c08cf548feb0451c429216d8.zip | |
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/iommu.c')
| -rw-r--r-- | drivers/iommu/iommu.c | 23 |
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; } |