Messages in this thread Patch in this message | | | From | John Garry <> | Subject | [PATCH v11 3/3] iommu/amd: Add support for IOMMU default DMA mode build options | Date | Tue, 8 Jun 2021 21:18:28 +0800 |
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From: Zhen Lei <thunder.leizhen@huawei.com>
The default DMA mode lazy, but allow this to be set to strict mode at build time. It may still be overridden by the relevant boot option.
Also make IOMMU_DEFAULT_LAZY default for when AMD_IOMMU config is set.
[jpg: Rebase for relocated file] Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> --- drivers/iommu/Kconfig | 2 +- drivers/iommu/amd/init.c | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index b68ec7ed23c0..6d99150050b9 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -95,7 +95,7 @@ choice depends on IOMMU_API depends on X86 || IA64 || X86_64 || ARM || ARM64 - default IOMMU_DEFAULT_LAZY if INTEL_IOMMU + default IOMMU_DEFAULT_LAZY if (AMD_IOMMU || INTEL_IOMMU) default IOMMU_DEFAULT_STRICT help This option allows an IOMMU DMA mode to be chosen at build time, to diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index d006724f4dc2..af662fc37cbe 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -160,7 +160,8 @@ u16 amd_iommu_last_bdf; /* largest PCI device id we have to handle */ LIST_HEAD(amd_iommu_unity_map); /* a list of required unity mappings we find in ACPI */ -bool amd_iommu_unmap_flush; /* if true, flush on every unmap */ +/* if true, flush on every unmap */ +bool amd_iommu_unmap_flush = IS_ENABLED(CONFIG_IOMMU_DEFAULT_STRICT); LIST_HEAD(amd_iommu_list); /* list of all AMD IOMMUs in the system */ -- 2.26.2
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