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Re: [PATCH v3 06/23] xen/domctl: Add XEN_DOMCTL_CONFIG_VIOMMU_* and viommu config param
- To: Milan Djokic <milan_djokic@xxxxxxxx>
- From: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- Date: Fri, 10 Apr 2026 14:08:33 +0000
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Rahul Singh <Rahul.Singh@xxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Nick Rosbrook <enr0n@xxxxxxxxxx>, George Dunlap <gwd@xxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>
- Delivery-date: Fri, 10 Apr 2026 14:09:57 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [PATCH v3 06/23] xen/domctl: Add XEN_DOMCTL_CONFIG_VIOMMU_* and viommu config param
HI Milan,
> On 31 Mar 2026, at 02:52, Milan Djokic <milan_djokic@xxxxxxxx> wrote:
>
> From: Rahul Singh <rahul.singh@xxxxxxx>
>
> Add new viommu_type field and field values XEN_DOMCTL_CONFIG_VIOMMU_NONE
> XEN_DOMCTL_CONFIG_VIOMMU_SMMUV3 in xen_arch_domainconfig to
> enable/disable vIOMMU support for domains.
>
> Also add viommu="N" parameter to xl domain configuration to enable the
> vIOMMU for the domains. Currently, only the "smmuv3" type is supported
> for ARM.
>
> Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
> Signed-off-by: Milan Djokic <milan_djokic@xxxxxxxx>
> Acked-by: Nick Rosbrook <enr0n@xxxxxxxxxx>
> ---
> docs/man/xl.cfg.5.pod.in | 13 +++++++++++++
> tools/golang/xenlight/helpers.gen.go | 2 ++
> tools/golang/xenlight/types.gen.go | 7 +++++++
> tools/include/libxl.h | 5 +++++
> tools/libs/light/libxl_arm.c | 13 +++++++++++++
> tools/libs/light/libxl_types.idl | 6 ++++++
> tools/xl/xl_parse.c | 9 +++++++++
> 7 files changed, 55 insertions(+)
>
> diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in
> index 3aac0bc4fb..4de8db42ac 100644
> --- a/docs/man/xl.cfg.5.pod.in
> +++ b/docs/man/xl.cfg.5.pod.in
> @@ -3175,6 +3175,19 @@ option.
>
> =back
>
> +=over 4
> +
> +=item B<viommu="N">
“N” is misleading, I can think about a number. I think we can have “STRING” here
>
> diff --git a/tools/include/libxl.h b/tools/include/libxl.h
> index 80e3ec8de9..231dbff5d9 100644
> --- a/tools/include/libxl.h
> +++ b/tools/include/libxl.h
> @@ -318,6 +318,11 @@
> */
> #define LIBXL_HAVE_BUILDINFO_ARCH_ARM_SCI 1
>
> +/*
> + * libxl_domain_build_info has the arch_arm.viommu_type field.
> + */
> +#define LIBXL_HAVE_BUILDINFO_ARM_VIOMMU 1
I think this should be LIBXL_HAVE_BUILDINFO_ARCH_ARM_VIOMMU
Cheers,
Luca
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