The advanced interrupt architecture (AIA) extends the per-HART local interrupt support. Along with this, it also adds IMSIC (MSI contrllor) and Advanced PLIC (wired interrupt controller).
The latest AIA draft specification can be found here: http://jhauser.us/private/RISCV-AIA/riscv-interrupts-021.pdf This series adds initial AIA support in QEMU which includes emulating all AIA local CSR. To enable AIA in QEMU, we just need to pass "x-aia=true" paramenter in "-cpu" QEMU command-line. To test series, we require OpenSBI and Linux with AIA support which can be found in riscv_aia_v1 branch at: https://github.com/avpatel/opensbi.git https://github.com/avpatel/linux.git Anup Patel (4): target/riscv: Add defines for AIA local interrupt CSRs target/riscv: Add CPU feature for AIA CSRs target/riscv: Implement AIA local interrupt CSRs hw/riscv: virt: Use AIA INTC compatible string when available hw/riscv/virt.c | 11 +- target/riscv/cpu.c | 32 +- target/riscv/cpu.h | 56 +- target/riscv/cpu_bits.h | 128 +++++ target/riscv/cpu_helper.c | 245 ++++++++- target/riscv/csr.c | 1059 +++++++++++++++++++++++++++++++++++-- target/riscv/machine.c | 26 +- 7 files changed, 1454 insertions(+), 103 deletions(-) -- 2.25.1
