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docs/specs: add riscv-iommu-sys information

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Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20241106133407.604587-8-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
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Daniel Henrique Barboza 2024-11-06 10:34:07 -03:00 • committed by Alistair Francis
parent 9afd26715e
commit 1c187ad5c0
2 changed files with 37 additions and 3 deletions
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10
docs/system/riscv/virt.rst
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@ -94,6 +94,12 @@ command line:
$ qemu-system-riscv64 -M virt -device riscv-iommu-pci (...)
It also has support for the riscv-iommu-sys platform device:
.. code-block:: bash
$ qemu-system-riscv64 -M virt,iommu-sys=on (...)
Refer to :ref:`riscv-iommu` for more information on how the RISC-V IOMMU support
works.
@ -129,6 +135,10 @@ The following machine-specific options are supported:
having AIA IMSIC (i.e. "aia=aplic-imsic" selected). When not specified,
the default number of per-HART VS-level AIA IMSIC pages is 0.
- iommu-sys=[on|off]
Enables the riscv-iommu-sys platform device. Defaults to 'off'.
Running Linux kernel
--------------------