Thx Will, On Mon, Jun 24, 2019 at 6:40 PM Will Deacon <will@xxxxxxxxxx> wrote: > > I'll keep my system use the same ASID for SMP + IOMMU :P > > You will want a separate allocator for that: > > https://lkml.kernel.org/r/20190610184714.6786-2-jean-philippe.brucker@xxxxxxx Yes, it is hard to maintain ASID between IOMMU and CPUMMU or different system, because it's difficult to synchronize the IO_ASID when the CPU ASID is rollover. But we could still use hardware broadcast TLB invalidation instruction to uniformly manage the ASID and IO_ASID, or OTHER_ASID in our IOMMU. Welcome to join our disscusion: "Introduce an implementation of IOMMU in linux-riscv" 9 Sep 2019, 10:45 Jade-room-I&II (Corinthia Hotel Lisbon) RISC-V MC -- Best Regards Guo Ren ML: https://lore.kernel.org/linux-csky/ _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
