iommu/riscv: prefer WSI on IGS=BOTH when wired IRQs are described - #343
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iommu/riscv: prefer WSI on IGS=BOTH when wired IRQs are described#343gougou1104 wants to merge 1 commit into
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driver inclusion category: bugfix Link: RVCK-Project#342 Reference: https://lkml.org/lkml/2026/5/19/1406 -------------------------------- The RISC-V IOMMU spec defines IGS=BOTH as supporting both MSI and WSI, with software selecting the path. The DT path already behaves as expected by selecting WSI when wired IRQ resources are described. The ACPI path, however, currently falls back to MSI even when firmware describes wired IRQ resources. Use firmware-described wired IRQ resources as the trigger to select WSI for IGS=BOTH: - DT: "interrupts" present, no "msi-parent" - ACPI: DSDT _CRS Interrupt() descriptors (mainline does not yet parse the RIMT Interrupt Wire Array) When triggered, rewrite igs to IGS_WSI and reuse the existing WSI handling. Keep the existing behaviour otherwise. Fixes: d5f88ac ("iommu/riscv: Add support for platform msi") Signed-off-by: Fangyu Yu <fangyu.yu@linux.alibaba.com> Signed-off-by: Li Hongbin <lihongbin@lanxincomputing.com>
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开始测试 log: https://github.com/RVCK-Project/rvck/actions/runs/29907454871 参数解析结果
测试完成 详细结果:
Kunit Test Result[09:23:28] Testing complete. Ran 482 tests: passed: 465, skipped: 17
Kernel Build Result
Check Patch Result
LAVA Check (qemu)
result: Lava check done!
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fixed: #342
driver inclusion
category: bugfix
Link: #342
Reference: https://lkml.org/lkml/2026/5/19/1406
The RISC-V IOMMU spec defines IGS=BOTH as supporting both MSI and WSI, with software selecting the path. The DT path already behaves as expected by selecting WSI when wired IRQ resources are described. The ACPI path, however, currently falls back to MSI even when firmware describes wired IRQ resources.
Use firmware-described wired IRQ resources as the trigger to select WSI for IGS=BOTH:
When triggered, rewrite igs to IGS_WSI and reuse the existing WSI handling. Keep the existing behaviour otherwise.
Fixes: d5f88ac ("iommu/riscv: Add support for platform msi")