Hi all, Can anybody review or comment? On 2019/4/18 21:57, Zhen Lei wrote: > v5 --> v6: > 1. give up adding boot option iommu.dma_mode > > v4 --> v5: > As Hanjun and Thomas Gleixner's suggestion: > 1. Keep the old ARCH specific boot options no change. > 2. Keep build option CONFIG_IOMMU_DEFAULT_PASSTHROUGH no change. > > v4: > As Robin Murphy's suggestion: > "It's also not necessarily obvious to the user how this interacts with > IOMMU_DEFAULT_PASSTHROUGH, so if we really do go down this route, maybe it > would be better to refactor the whole lot into a single selection of something > like IOMMU_DEFAULT_MODE anyway." > > In this version, I tried to normalize the IOMMU dma mode boot options for all > ARCHs. When IOMMU is enabled, there are 3 dma modes: paasthrough(bypass), > lazy(mapping but defer the IOTLB invalidation), strict. But currently each > ARCHs defined their private boot options, different with each other. For > example, to enable/disable "passthrough", ARM64 use iommu.passthrough=1/0, > X86 use iommu=pt/nopt, PPC/POWERNV use iommu=nobypass. > > Zhen Lei (1): > iommu: enhance IOMMU dma mode build options > > arch/ia64/kernel/pci-dma.c | 2 +- > arch/powerpc/platforms/powernv/pci-ioda.c | 3 ++- > arch/s390/pci/pci_dma.c | 2 +- > arch/x86/kernel/pci-dma.c | 7 ++--- > drivers/iommu/Kconfig | 44 ++++++++++++++++++++++++++----- > drivers/iommu/amd_iommu_init.c | 3 ++- > drivers/iommu/intel-iommu.c | 2 +- > drivers/iommu/iommu.c | 3 ++- > 8 files changed, 48 insertions(+), 18 deletions(-) > -- Thanks! BestRegards
