Description
We're holding another edition of the RISC-V microconference for Plumbers at 2023. Broadly speaking anything related to both Linux and RISC-V is on topic, but discussion tend to involve the following categories:
- How to support new RISC-V ISA features in Linux, both for the standards are for vendor-specific extensions.
- Discussions related to RISC-V based SOCs, which frequently include interactions with other Linux subsystems as well as core arch/riscv code.
- Coordination with distributions and toolchains on userspace-visible behavior.
The Supervisor Software Events (SSE) extension provides a
mechanism to inject software events from an SBI implementation
to supervisor software such that it preempts all other traps and
interrupts. This brings interesting challenges for the SBI implementation (OpenSBI,KVM RISC-V, etc) and supervisor software (Linux).
KVM and VFIO provide an architecture-neutral irqbypass framework, but
its enablement requires an implementation of an architecture-specific
function, kvm_arch_irq_bypass_add_producer(). The RISC-V AIA and IOMMU
specifications provide novel support for guest interrupt delivery (most
notably MRIFs), which must be considered for RISC-V KVM's irqbypass
implementation. We have an initial...
