Re: [PATCH 0/4] AIA local interrupt CSR support

[Anup Patel <anup@brainfault.org>]

Hi Alistair,

On Fri, May 14, 2021 at 8:03 PM Anup Patel <anup.patel@wdc.com> wrote:
>
> 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

The ACLINT specification will be frozen soon (probably early next
month). The ACLINT QEMU support patches are also ready and don't
depend on the AIA QEMU support patches.

Is it okay to target ACLINT support in QEMU first ?

I can rebase this series on ACLINT support patches and also include
more AIA emulation patches (APLIC and IMSIC) in the AIA series.

Regards,
Anup

>
>  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
>