On Tue, Feb 18, 2025 at 02:52:29PM -0400, Jason Gunthorpe wrote: > On Tue, Feb 18, 2025 at 06:17:15PM +0000, Pranjal Shrivastava wrote: > > > > Is MEV available only in nested mode? Otherwise it perhaps makes > > > sense to turn it on in all configurations in IOMMUFD paths... > > > > I think the arm-smmu-v3's iommufd implementation only supports nested > > which could be the reason. > > I think starting with MEV in this limited case is reasonable. > > I agree it makes sense to always turn it on from a production > perspective.. Then, I will just add a line to the commit log: "In the future, we might want to enable the MEV for non-nested cases too such as domain->type == IOMMU_DOMAIN_UNMANAGED or even IOMMU_DOMAIN_DMA." Thanks Nicolin
