1*5084Sjohnlev /* 2*5084Sjohnlev * CDDL HEADER START 3*5084Sjohnlev * 4*5084Sjohnlev * The contents of this file are subject to the terms of the 5*5084Sjohnlev * Common Development and Distribution License (the "License"). 6*5084Sjohnlev * You may not use this file except in compliance with the License. 7*5084Sjohnlev * 8*5084Sjohnlev * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*5084Sjohnlev * or http://www.opensolaris.org/os/licensing. 10*5084Sjohnlev * See the License for the specific language governing permissions 11*5084Sjohnlev * and limitations under the License. 12*5084Sjohnlev * 13*5084Sjohnlev * When distributing Covered Code, include this CDDL HEADER in each 14*5084Sjohnlev * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*5084Sjohnlev * If applicable, add the following below this CDDL HEADER, with the 16*5084Sjohnlev * fields enclosed by brackets "[]" replaced with your own identifying 17*5084Sjohnlev * information: Portions Copyright [yyyy] [name of copyright owner] 18*5084Sjohnlev * 19*5084Sjohnlev * CDDL HEADER END 20*5084Sjohnlev */ 21*5084Sjohnlev /* 22*5084Sjohnlev * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23*5084Sjohnlev * Use is subject to license terms. 24*5084Sjohnlev */ 25*5084Sjohnlev 26*5084Sjohnlev #ifndef _SYS_BALLOON_IMPL_H 27*5084Sjohnlev #define _SYS_BALLOON_IMPL_H 28*5084Sjohnlev 29*5084Sjohnlev #pragma ident "%Z%%M% %I% %E% SMI" 30*5084Sjohnlev 31*5084Sjohnlev #include <sys/balloon.h> 32*5084Sjohnlev #include <sys/types.h> 33*5084Sjohnlev #include <vm/page.h> 34*5084Sjohnlev #include <sys/xen_mmu.h> /* to get typedef of mfn_t */ 35*5084Sjohnlev 36*5084Sjohnlev #ifdef __cplusplus 37*5084Sjohnlev extern "C" { 38*5084Sjohnlev #endif 39*5084Sjohnlev 40*5084Sjohnlev /* 41*5084Sjohnlev * This file contains interfaces for both the balloon kernel thread 42*5084Sjohnlev * and the balloon driver. The balloon device is installed under /dev/xen, 43*5084Sjohnlev * and can be used with the ioctl values in balloon.h to get the balloon 44*5084Sjohnlev * memory status. 45*5084Sjohnlev */ 46*5084Sjohnlev 47*5084Sjohnlev /* balloon thread declarations */ 48*5084Sjohnlev void balloon_init(pgcnt_t); 49*5084Sjohnlev size_t balloon_values(int); 50*5084Sjohnlev void balloon_drv_added(int64_t); 51*5084Sjohnlev void balloon_drv_subtracted(int64_t); 52*5084Sjohnlev long balloon_alloc_pages(uint_t, mfn_t *); 53*5084Sjohnlev long balloon_free_pages(uint_t, mfn_t *, caddr_t, pfn_t *); 54*5084Sjohnlev long balloon_replace_pages(uint_t, page_t **, uint_t, uint_t, mfn_t *); 55*5084Sjohnlev 56*5084Sjohnlev /* balloon driver information */ 57*5084Sjohnlev #define BALLOON_MINOR 0 58*5084Sjohnlev 59*5084Sjohnlev /* 60*5084Sjohnlev * Critical stats for the balloon thread. All values are in pages. 61*5084Sjohnlev */ 62*5084Sjohnlev typedef struct { 63*5084Sjohnlev pgcnt_t bln_current_pages; /* current reservation */ 64*5084Sjohnlev pgcnt_t bln_new_target; /* target value for reservation */ 65*5084Sjohnlev pgcnt_t bln_max_pages; /* first pfn for which we don't have a page_t */ 66*5084Sjohnlev pgcnt_t bln_low; /* lowest value of reservation since boot */ 67*5084Sjohnlev pgcnt_t bln_high; /* highest value of reservation since boot */ 68*5084Sjohnlev spgcnt_t bln_hv_pages; /* number of total pages given to hypervisor */ 69*5084Sjohnlev spgcnt_t bln_hard_limit; /* domain's max-mem limit */ 70*5084Sjohnlev } bln_stats_t; 71*5084Sjohnlev 72*5084Sjohnlev #ifdef __cplusplus 73*5084Sjohnlev } 74*5084Sjohnlev #endif 75*5084Sjohnlev 76*5084Sjohnlev #endif /* _SYS_BALLOON_IMPL_H */ 77