From 22bb182c839d8ef6c08cf548feb0451c429216d8 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Mon, 19 Aug 2019 15:22:54 +0200 Subject: 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 --- drivers/iommu/iommu.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) (limited to 'drivers/iommu/iommu.c') 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; } -- cgit