/*- * Copyright (c) 2015 Adrian Chadd . * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any * redistribution must be conditioned upon including a substantially * similar Disclaimer requirement for further binary redistribution. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGES. * * $FreeBSD$ */ #ifndef __VM_DOMAIN_H__ #define __VM_DOMAIN_H__ #include extern int vm_ndomains; extern struct vm_domain_policy *vm_default_policy; static inline int vm_domain_select_first(struct vm_domain_iterator *vi) { int domain; switch (vi->policy) { case VM_POLICY_NONE: domain = 0; break; case VM_POLICY_ROUND_ROBIN: domain = atomic_fetchadd_int(&vi->cursor, 1) % vm_ndomains; break; case VM_POLICY_FIXED_DOMAIN: case VM_POLICY_FIXED_DOMAIN_ROUND_ROBIN: domain = vi->domain; break; case VM_POLICY_FIRST_TOUCH: case VM_POLICY_FIRST_TOUCH_ROUND_ROBIN: domain = PCPU_GET(domain); break; } return (domain); } static inline int vm_domain_select_next(struct vm_domain_iterator *vi, int domain) { switch (vi->policy) { case VM_POLICY_FIXED_DOMAIN: case VM_POLICY_FIRST_TOUCH: return (-1); default: return ((domain + 1) % vm_ndomains); } } /* * TODO: check to see if these should just become inline functions * at some point. */ extern int vm_domain_policy_init(struct vm_domain_policy *vp); extern int vm_domain_policy_set(struct vm_domain_policy *vp, vm_domain_policy_type_t vt, int domain); extern int vm_domain_policy_cleanup(struct vm_domain_policy *vp); extern void vm_domain_policy_localcopy(struct vm_domain_policy *dst, const struct vm_domain_policy *src); extern void vm_domain_policy_copy(struct vm_domain_policy *dst, const struct vm_domain_policy *src); extern int vm_domain_policy_validate(const struct vm_domain_policy *vp); extern int vm_domain_iterator_init(struct vm_domain_iterator *vi); extern int vm_domain_iterator_set(struct vm_domain_iterator *vi, vm_domain_policy_type_t vt, int domain); extern void vm_domain_iterator_set_policy(struct vm_domain_iterator *vi, const struct vm_domain_policy *vt); extern int vm_domain_iterator_run(struct vm_domain_iterator *vi, int *domain); extern int vm_domain_iterator_isdone(struct vm_domain_iterator *vi); extern int vm_domain_iterator_cleanup(struct vm_domain_iterator *vi); #endif /* __VM_DOMAIN_H__ */