On 08.04.2025 18:07, Alejandro Vallejo wrote:
> --- a/xen/arch/x86/domain-builder/fdt.c
> +++ b/xen/arch/x86/domain-builder/fdt.c
> @@ -193,6 +193,25 @@ static int __init process_domain_node(
>              bd->domid = (domid_t)val;
>              printk("  domid: %d\n", bd->domid);
>          }
> +        else if ( strncmp(prop_name, "mode", name_len) == 0 )
> +        {
> +            if ( fdt_prop_as_u32(prop, &bd->mode) != 0 )
> +            {
> +                printk("  failed processing mode for domain %s\n", name);
> +                return -EINVAL;
> +            }
> +
> +            printk("  mode: ");
> +            if ( !(bd->mode & BUILD_MODE_PARAVIRT) )
> +            {
> +                if ( bd->mode & BUILD_MODE_ENABLE_DM )
> +                    printk("HVM\n");
> +                else
> +                    printk("PVH\n");
> +            }
> +            else
> +                printk("PV\n");
> +        }

My prior questions here remain: What's the significance of
BUILD_MODE_ENABLE_DM when set alongside BUILD_MODE_PARAVIRT? What about
any of the other bits being set?

Jan

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