# Allow all domains to use (unprivileged parts of) the tmem hypercall allow domain_type xen_t:xen tmem_op; # Allow all domains to use PMU (but not to change its settings --- that's what # pmu_ctrl is for) allow domain_type xen_t:xen2 pmu_use; # Allow guest console output to the serial console. This is used by PV Linux # and stub domains for early boot output, so don't audit even when we deny it. # Without XSM, this is enabled only if the Xen was compiled in debug mode. gen_bool(guest_writeconsole, true) if (guest_writeconsole) { allow domain_type xen_t : xen writeconsole; } else { dontaudit domain_type xen_t : xen writeconsole; } # For normal guests, allow all queries except XENVER_commandline. allow domain_type xen_t:version { xen_extraversion xen_compile_info xen_capabilities xen_changeset xen_pagesize xen_guest_handle }; # Version queries don't need auditing when denied. They can be # encountered in normal operation by xl or by reading sysfs files in # Linux, so without this they will show up in the logs. Since these # operations return valid responses (like "denied"), hiding the denials # should not break anything. dontaudit domain_type xen_t:version { xen_commandline xen_build_id };