[PATCH 0/2] iommu/riscv: Enable IOMMU_DMA

[Andrew Jones]

Arguably long overdue, let's start using paging domains. One blocker
to enabling IOMMU_DMA was that platforms with IMSICs would fault on
MSIs - Patch1 handles that. And, since QEMU is still one of the most-
used riscv platforms, another issue is that commit 69541898b71a
("iommu/riscv: Enable SVNAPOT support for contiguous ptes") exposes
a bug in the QEMU RISC-V IOMMU model. A patch for that is now on the
QEMU list[1].

Rest assured that the irqbypass work will get a v3 posted soon. This
series can be independently merged though since we don't need irqbypass
to enable paging domains and deliver MSIs for host devices.

[1] https://lore.kernel.org/all/20260508205129.377032-1-andrew.jones@xxxxxxxxxxxxxxxx/
 

Andrew Jones (1):
  iommu/riscv: Map IMSIC addresses for paging domains

Tomasz Jeznach (1):
  iommu/dma: enable IOMMU_DMA for RISC-V

 drivers/iommu/Kconfig               |  2 +-
 drivers/iommu/riscv/iommu.c         | 34 +++++++++++++++++++++++++++++
 include/linux/irqchip/riscv-imsic.h |  7 ++++++
 3 files changed, 42 insertions(+), 1 deletion(-)

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2.43.0