1*9fbe302bSMichael S. Tsirkin #ifndef _LINUX_VIRTIO_BALLOON_H 2*9fbe302bSMichael S. Tsirkin #define _LINUX_VIRTIO_BALLOON_H 3*9fbe302bSMichael S. Tsirkin /* This header is BSD licensed so anyone can use the definitions to implement 4*9fbe302bSMichael S. Tsirkin * compatible drivers/servers. 5*9fbe302bSMichael S. Tsirkin * 6*9fbe302bSMichael S. Tsirkin * Redistribution and use in source and binary forms, with or without 7*9fbe302bSMichael S. Tsirkin * modification, are permitted provided that the following conditions 8*9fbe302bSMichael S. Tsirkin * are met: 9*9fbe302bSMichael S. Tsirkin * 1. Redistributions of source code must retain the above copyright 10*9fbe302bSMichael S. Tsirkin * notice, this list of conditions and the following disclaimer. 11*9fbe302bSMichael S. Tsirkin * 2. Redistributions in binary form must reproduce the above copyright 12*9fbe302bSMichael S. Tsirkin * notice, this list of conditions and the following disclaimer in the 13*9fbe302bSMichael S. Tsirkin * documentation and/or other materials provided with the distribution. 14*9fbe302bSMichael S. Tsirkin * 3. Neither the name of IBM nor the names of its contributors 15*9fbe302bSMichael S. Tsirkin * may be used to endorse or promote products derived from this software 16*9fbe302bSMichael S. Tsirkin * without specific prior written permission. 17*9fbe302bSMichael S. Tsirkin * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND 18*9fbe302bSMichael S. Tsirkin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*9fbe302bSMichael S. Tsirkin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*9fbe302bSMichael S. Tsirkin * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE 21*9fbe302bSMichael S. Tsirkin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*9fbe302bSMichael S. Tsirkin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*9fbe302bSMichael S. Tsirkin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*9fbe302bSMichael S. Tsirkin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*9fbe302bSMichael S. Tsirkin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*9fbe302bSMichael S. Tsirkin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*9fbe302bSMichael S. Tsirkin * SUCH DAMAGE. */ 28*9fbe302bSMichael S. Tsirkin #include "standard-headers/linux/virtio_ids.h" 29*9fbe302bSMichael S. Tsirkin #include "standard-headers/linux/virtio_config.h" 30*9fbe302bSMichael S. Tsirkin 31*9fbe302bSMichael S. Tsirkin /* The feature bitmap for virtio balloon */ 32*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */ 33*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_F_STATS_VQ 1 /* Memory Stats virtqueue */ 34*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_F_DEFLATE_ON_OOM 2 /* Deflate balloon on OOM */ 35*9fbe302bSMichael S. Tsirkin 36*9fbe302bSMichael S. Tsirkin /* Size of a PFN in the balloon interface. */ 37*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_PFN_SHIFT 12 38*9fbe302bSMichael S. Tsirkin 39*9fbe302bSMichael S. Tsirkin struct virtio_balloon_config { 40*9fbe302bSMichael S. Tsirkin /* Number of pages host wants Guest to give up. */ 41*9fbe302bSMichael S. Tsirkin uint32_t num_pages; 42*9fbe302bSMichael S. Tsirkin /* Number of pages we've actually got in balloon. */ 43*9fbe302bSMichael S. Tsirkin uint32_t actual; 44*9fbe302bSMichael S. Tsirkin }; 45*9fbe302bSMichael S. Tsirkin 46*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_S_SWAP_IN 0 /* Amount of memory swapped in */ 47*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_S_SWAP_OUT 1 /* Amount of memory swapped out */ 48*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_S_MAJFLT 2 /* Number of major faults */ 49*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_S_MINFLT 3 /* Number of minor faults */ 50*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_S_MEMFREE 4 /* Total amount of free memory */ 51*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_S_MEMTOT 5 /* Total amount of memory */ 52*9fbe302bSMichael S. Tsirkin #define VIRTIO_BALLOON_S_NR 6 53*9fbe302bSMichael S. Tsirkin 54*9fbe302bSMichael S. Tsirkin struct virtio_balloon_stat { 55*9fbe302bSMichael S. Tsirkin uint16_t tag; 56*9fbe302bSMichael S. Tsirkin uint64_t val; 57*9fbe302bSMichael S. Tsirkin } QEMU_PACKED; 58*9fbe302bSMichael S. Tsirkin 59*9fbe302bSMichael S. Tsirkin #endif /* _LINUX_VIRTIO_BALLOON_H */ 60