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 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/balloon.h> 32 #include <sys/types.h> 33 #include <vm/page.h> 34 #include <sys/xen_mmu.h> /* to get typedef of mfn_t */ 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 /* 41 * This file contains interfaces for both the balloon kernel thread 42 * and the balloon driver. The balloon device is installed under /dev/xen, 43 * and can be used with the ioctl values in balloon.h to get the balloon 44 * memory status. 45 */ 46 47 /* balloon thread declarations */ 48 void balloon_init(pgcnt_t); 49 size_t balloon_values(int); 50 void balloon_drv_added(int64_t); 51 void balloon_drv_subtracted(int64_t); 52 long balloon_alloc_pages(uint_t, mfn_t *); 53 long balloon_free_pages(uint_t, mfn_t *, caddr_t, pfn_t *); 54 long balloon_replace_pages(uint_t, page_t **, uint_t, uint_t, mfn_t *); 55 56 /* balloon driver information */ 57 #define BALLOON_MINOR 0 58 59 /* 60 * Critical stats for the balloon thread. All values are in pages. 61 */ 62 typedef struct { 63 pgcnt_t bln_current_pages; /* current reservation */ 64 pgcnt_t bln_new_target; /* target value for reservation */ 65 pgcnt_t bln_max_pages; /* first pfn for which we don't have a page_t */ 66 pgcnt_t bln_low; /* lowest value of reservation since boot */ 67 pgcnt_t bln_high; /* highest value of reservation since boot */ 68 spgcnt_t bln_hv_pages; /* number of total pages given to hypervisor */ 69 spgcnt_t bln_hard_limit; /* domain's max-mem limit */ 70 } bln_stats_t; 71 72 #ifdef __cplusplus 73 } 74 #endif 75 76 #endif /* _SYS_BALLOON_IMPL_H */ 77