stub_xc_domain_create() fails unconditionally with "Unhandled: ARM" for
the ARM variant of arch_domainconfig, so no OCaml toolstack (e.g.
xenopsd) can create an ARM domain.
To fix this, convert the two fields of xen_arm_arch_domainconfig,
gic_version and nr_spis, into the corresponding fields of struct
xen_arch_domainconfig and reject values that do not fit, as is already
done for other parameters. The remaining fields (sve_vl, tee_type,
arm_sci_type and v8r_el1_msa) aren't exposed to OCaml yet, so they stay
zero.
Also add a BUILD_BUG_ON() on the size of the createdomain struct, just
like the x86 case, to catch future ABI changes.
Signed-off-by: Andrii Sultanov <andriy.sultanov@vates.tech>
Signed-off-by: Julian Vetter <julian.vetter@vates.tech>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>