/*- * SPDX-License-Identifier: BSD-3-Clause * * This header is BSD licensed so anyone can use the definitions to implement * compatible drivers/servers. * * 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. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of IBM nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * 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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE. * * $FreeBSD: head/sys/dev/virtio/balloon/virtio_balloon.h 326022 2017-11-20 19:36:21Z pfg $ */ /* * Copyright (c) 2018 The DragonFly Project. All rights reserved. * * This code is derived from software contributed to The DragonFly Project * by Diederik de Groot <info@talon.nl> * * 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. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name of The DragonFly Project nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific, prior written permission. * * 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 MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, 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 DAMAGE. */ /* Driver for VirtIO memory balloon devices. */ #ifndef _VIRTIO_BALLOON_H #define _VIRTIO_BALLOON_H /* Feature bits. */ #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0x1 /* Tell before reclaiming pages */ #define VIRTIO_BALLOON_F_STATS_VQ 0x2 /* Memory stats virtqueue */ #define VIRTIO_BALLOON_F_DEFLATE_ON_OOM 0x3 /* Deflate on Out Of Memory */ /* Size of a PFN in the balloon interface. */ #define VIRTIO_BALLOON_PFN_SHIFT 12 struct virtio_balloon_config { /* Number of pages host wants Guest to give up. */ uint32_t num_pages; /* Number of pages we've actually got in balloon. */ uint32_t actual; }; #define VTBALLOON_S_SWAP_IN 0 /* The amount of memory that has been swapped in (in bytes) */ #define VTBALLOON_S_SWAP_OUT 1 /* The amount of memory that has been swapped out to disk (in bytes). */ #define VTBALLOON_S_MAJFLT 2 /* The number of major page faults that have occurred. */ #define VTBALLOON_S_MINFLT 3 /* The number of minor page faults that have occurred. */ #define VTBALLOON_S_MEMFREE 4 /* The amount of memory not being used for any purpose (in bytes). */ #define VTBALLOON_S_MEMTOT 5 /* The total amount of memory available (in bytes). */ #define VTBALLOON_S_AVAIL 6 /* The amount of availabe memory (in bytes) as in linux-proc */ #define VTBALLOON_S_CACHES 7 /* Disk-File caches */ #define VTBALLOON_S_HTLB_PGALLOC 8 /* Hugetlb page allocations */ #define VTBALLOON_S_HTLB_PGFAIL 9 /* Hugetlb page allocation failures */ #define VTBALLOON_S_NR 10 #define VTBALLOON_S_NAMES_WITH_PREFIX(VTBALLOON_S_NAMES_prefix) { \ VTBALLOON_S_NAMES_prefix "swap-in", \ VTBALLOON_S_NAMES_prefix "swap-out", \ VTBALLOON_S_NAMES_prefix "major-faults", \ VTBALLOON_S_NAMES_prefix "minor-faults", \ VTBALLOON_S_NAMES_prefix "free-memory", \ VTBALLOON_S_NAMES_prefix "total-memory", \ VTBALLOON_S_NAMES_prefix "available-memory", \ VTBALLOON_S_NAMES_prefix "disk-file-caches", \ VTBALLOON_S_NAMES_prefix "hugetlb-allocations", \ VTBALLOON_S_NAMES_prefix "hugetlb-failures" \ } #define VTBALLOON_S_NAMES VTBALLOON_S_NAMES_WITH_PREFIX("") /* * Memory statistics structure. * Driver fills an array of these structures and passes to device. * * NOTE: fields are laid out in a way that would make compiler add padding * between and after fields, but the virtio specification does not allow * for this. So the struct has to be packed. */ struct vtballoon_stat { uint16_t tag; uint64_t val; } __packed; #endif /* _VIRTIO_BALLOON_H */
