Re: [Xen-devel] [PATCH-for-4.13] libxl: choose an appropriate default for passthrough...

[Jürgen Groß <jgross@xxxxxxxx>]

On 01.10.19 11:12, Paul Durrant wrote:
> ...if there is no IOMMU or it is globally disabled.
>
> Without this patch, the following assertion may be hit:
>
> xl: libxl_create.c:589: libxl__domain_make: Assertion `info->passthrough != 
> LIBXL_PASSTHROUGH_ENABLED' failed.
>
> This is because libxl__domain_create_info_setdefault() currently only sets
> an appropriate value for 'passthrough' in the case that 'cap_hvm_directio'
> is true, which is not the case unless an IOMMU is present and enabled in
> the system. This is normally masked by xl choosing a default value, but
> that will not happen if xl is not used (e.g. when using libvirt) or when
> a stub domain is being created.
>
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
Release-acked-by: Juergen Gross <jgross@xxxxxxxx>


Juergen

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