On Fri, 13 Jun 2025 15:44:49 +0100
Shameer Kolothum <shameerali.kolothum.th...@huawei.com> wrote:
> Now that arm,virt can have user-creatable smmuv3 devices, document it.
>
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.th...@huawei.com>
> ---
> qemu-options.hx | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 7eb8e02b4b..3edbde45bb 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -1226,6 +1226,12 @@ SRST
> ``aw-bits=val`` (val between 32 and 64, default depends on machine)
> This decides the address width of the IOVA address space.
>
> +``-device arm-smmuv3,primary-bus=id``
> + This is only supported by ``-machine virt`` (ARM).
> +
> + ``primary-bus=id``
> + The PCIe Root Complex to be associated with.
Hmm. Root complex or host bridge?
I think an RC is allowed to have multiple heirarchy and hence multiple
host bridges. Figure 1.2 in the PCI spec. So my gut feeling is this
should be host bridge.
> +
> ERST
>
> DEF("name", HAS_ARG, QEMU_OPTION_name,
