Re: [RFC PATCH v1 24/26] xen/arm, tools: add domctl for Realm finalization

[Jan Beulich <jbeulich@xxxxxxxx>]

On 15.05.2026 06:08, Koichiro Den wrote:
> --- a/xen/include/public/domctl.h
> +++ b/xen/include/public/domctl.h
> @@ -1201,6 +1201,16 @@ struct xen_domctl_vuart_op {
>                                   */
>  };
>  
> +/* XEN_DOMCTL_arm_cca_op */
> +struct xen_domctl_arm_cca_op {
> +#define XEN_DOMCTL_ARM_CCA_OP_INIT_REALM  0
> +        uint32_t cmd;              /* IN - XEN_DOMCTL_ARM_CCA_OP_* */
> +        uint32_t flags;            /* IN - reserved, must be zero */
> +        uint64_aligned_t base_gfn;   /* IN - first guest RAM gfn to protect 
> */
> +        uint64_aligned_t nr_pages;   /* IN - number of 4K pages to protect */
> +        uint64_aligned_t rmi_result; /* OUT - raw RMI result on -EIO */
> +};
> +
>  /* XEN_DOMCTL_vmtrace_op: Perform VM tracing operations. */
>  struct xen_domctl_vmtrace_op {
>      uint32_t cmd;           /* IN */
> @@ -1368,6 +1378,7 @@ struct xen_domctl {
>  #define XEN_DOMCTL_gsi_permission                88
>  #define XEN_DOMCTL_set_llc_colors                89
>  #define XEN_DOMCTL_get_domain_state              90 /* stable interface */
> +#define XEN_DOMCTL_arm_cca_op                    91

If this is to be Arm only (as the name implies), ...

> @@ -1429,6 +1440,7 @@ struct xen_domctl {
>          struct xen_domctl_monitor_op        monitor_op;
>          struct xen_domctl_psr_alloc         psr_alloc;
>          struct xen_domctl_vuart_op          vuart_op;
> +        struct xen_domctl_arm_cca_op        arm_cca_op;

... this wants to move ...

>          struct xen_domctl_vmtrace_op        vmtrace_op;
>          struct xen_domctl_paging_mempool    paging_mempool;
>  #if defined(__arm__) || defined(__aarch64__)

... into this #if.

Jan