Re: [PATCH v4 0/3] riscv-iommu: always send MRIF notice MSI

On Mon, 2026-07-27 at 15:22 +0800, Flavien Solt wrote:
> The AIA specification requires an IOMMU to send the configured notice
> MSI after storing an MSI to an MRIF even when the destination
> interrupt
> is disabled. QEMU currently reads the MRIF interrupt-enable word and
> returns without sending the notice when the matching bit is clear.
> 
> Patch 1 lets iommu-testdev select an MSI payload and supplies its PCI
> requester ID. Patch 2 removes the invalid enable-bit gate. Patch 3
> checks
> both enable states through qemu-system-riscv64.
> 
> The complete RISC-V IOMMU qtest suite passes:
> 
>   MRIF notice: enable=0 pending=0x20 notice=0x12d
>   MRIF notice: enable=1 pending=0x20 notice=0x12d
>   6/6 tests passed
> 
> V3 used MIME transfer encoding to protect the patch body, but lore
> still
> received five hard-wrapped hunk headers. This revision resends
> unchanged
> code through b4 and carries the review tags received on v1 and v3.
> 
> Changes in v4:
>   - Resend through b4 after the v3 lore copy remained line-wrapped.
>   - Restore Daniel Henrique Barboza's Reviewed-by tag on patch 2.
>   - Add review and test tags from Nutty Liu and Chao Liu.
> 
> Changes in v3:
>   - Attempt to protect the patch body with MIME transfer encoding.
>   - Add Tao Tang's Reviewed-by tag to patch 1.
> 
> Changes in v2:
>   - Wrap the fix commit message.
>   - Keep the existing notification comment.
>   - Add deterministic IE-clear and IE-set qtests.
> 
> Signed-off-by: Flavien Solt <[email protected]>
> ---
> Flavien Solt (3):
>       hw/misc/iommu-testdev: support PCI MSI test writes
>       hw/riscv/riscv-iommu.c: always send MRIF notice MSI
>       tests/qtest: add RISC-V IOMMU MRIF notice tests

Thanks!

Applied to riscv-to-apply.next

Alistair

> 
>  hw/misc/iommu-testdev.c         |  14 +++++-
>  hw/riscv/riscv-iommu.c          |  13 -----
>  include/hw/misc/iommu-testdev.h |   1 +
>  tests/qtest/iommu-riscv-test.c  | 102
> ++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 115 insertions(+), 15 deletions(-)
> ---
> base-commit: 499039798cdad7d86b787fec0eaf1da4151c0f05
> change-id: 20260727-qemu-mrif-v4-c8e3c3a48b9c
> 
> Best regards,
> --  
> Flavien Solt <[email protected]>
>