On 14/05/21 17:13, Richard Henderson wrote:
Most of the VMM instructions are already disabled for user-only, by being usable only from ring 0.The spec is intentionally loose for VMMCALL, allowing the VMM to define syscalls for user-only. However, linux does not do so; VMMCALL is illegal.
Perhaps:However we're not emulating any VMM, so VMMCALL can just raise #UD unconditionally.
Paolo
