1*843e1988Sjohnlev /* 2*843e1988Sjohnlev * CDDL HEADER START 3*843e1988Sjohnlev * 4*843e1988Sjohnlev * The contents of this file are subject to the terms of the 5*843e1988Sjohnlev * Common Development and Distribution License (the "License"). 6*843e1988Sjohnlev * You may not use this file except in compliance with the License. 7*843e1988Sjohnlev * 8*843e1988Sjohnlev * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*843e1988Sjohnlev * or http://www.opensolaris.org/os/licensing. 10*843e1988Sjohnlev * See the License for the specific language governing permissions 11*843e1988Sjohnlev * and limitations under the License. 12*843e1988Sjohnlev * 13*843e1988Sjohnlev * When distributing Covered Code, include this CDDL HEADER in each 14*843e1988Sjohnlev * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*843e1988Sjohnlev * If applicable, add the following below this CDDL HEADER, with the 16*843e1988Sjohnlev * fields enclosed by brackets "[]" replaced with your own identifying 17*843e1988Sjohnlev * information: Portions Copyright [yyyy] [name of copyright owner] 18*843e1988Sjohnlev * 19*843e1988Sjohnlev * CDDL HEADER END 20*843e1988Sjohnlev */ 21*843e1988Sjohnlev /* 22*843e1988Sjohnlev * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23*843e1988Sjohnlev * Use is subject to license terms. 24*843e1988Sjohnlev */ 25*843e1988Sjohnlev 26*843e1988Sjohnlev #ifndef _SYS_BALLOON_IMPL_H 27*843e1988Sjohnlev #define _SYS_BALLOON_IMPL_H 28*843e1988Sjohnlev 29*843e1988Sjohnlev #pragma ident "%Z%%M% %I% %E% SMI" 30*843e1988Sjohnlev 31*843e1988Sjohnlev #include <sys/balloon.h> 32*843e1988Sjohnlev #include <sys/types.h> 33*843e1988Sjohnlev #include <vm/page.h> 34*843e1988Sjohnlev #include <sys/xen_mmu.h> /* to get typedef of mfn_t */ 35*843e1988Sjohnlev 36*843e1988Sjohnlev #ifdef __cplusplus 37*843e1988Sjohnlev extern "C" { 38*843e1988Sjohnlev #endif 39*843e1988Sjohnlev 40*843e1988Sjohnlev /* 41*843e1988Sjohnlev * This file contains interfaces for both the balloon kernel thread 42*843e1988Sjohnlev * and the balloon driver. The balloon device is installed under /dev/xen, 43*843e1988Sjohnlev * and can be used with the ioctl values in balloon.h to get the balloon 44*843e1988Sjohnlev * memory status. 45*843e1988Sjohnlev */ 46*843e1988Sjohnlev 47*843e1988Sjohnlev /* balloon thread declarations */ 48*843e1988Sjohnlev void balloon_init(pgcnt_t); 49*843e1988Sjohnlev size_t balloon_values(int); 50*843e1988Sjohnlev void balloon_drv_added(int64_t); 51*843e1988Sjohnlev void balloon_drv_subtracted(int64_t); 52*843e1988Sjohnlev long balloon_alloc_pages(uint_t, mfn_t *); 53*843e1988Sjohnlev long balloon_free_pages(uint_t, mfn_t *, caddr_t, pfn_t *); 54*843e1988Sjohnlev long balloon_replace_pages(uint_t, page_t **, uint_t, uint_t, mfn_t *); 55*843e1988Sjohnlev 56*843e1988Sjohnlev /* balloon driver information */ 57*843e1988Sjohnlev #define BALLOON_MINOR 0 58*843e1988Sjohnlev 59*843e1988Sjohnlev /* 60*843e1988Sjohnlev * Critical stats for the balloon thread. All values are in pages. 61*843e1988Sjohnlev */ 62*843e1988Sjohnlev typedef struct { 63*843e1988Sjohnlev pgcnt_t bln_current_pages; /* current reservation */ 64*843e1988Sjohnlev pgcnt_t bln_new_target; /* target value for reservation */ 65*843e1988Sjohnlev pgcnt_t bln_max_pages; /* first pfn for which we don't have a page_t */ 66*843e1988Sjohnlev pgcnt_t bln_low; /* lowest value of reservation since boot */ 67*843e1988Sjohnlev pgcnt_t bln_high; /* highest value of reservation since boot */ 68*843e1988Sjohnlev spgcnt_t bln_hv_pages; /* number of total pages given to hypervisor */ 69*843e1988Sjohnlev spgcnt_t bln_hard_limit; /* domain's max-mem limit */ 70*843e1988Sjohnlev } bln_stats_t; 71*843e1988Sjohnlev 72*843e1988Sjohnlev #ifdef __cplusplus 73*843e1988Sjohnlev } 74*843e1988Sjohnlev #endif 75*843e1988Sjohnlev 76*843e1988Sjohnlev #endif /* _SYS_BALLOON_IMPL_H */ 77