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