include/standard-headers/linux/virtio_pmem.h

   1 /* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause */
   2 /*
   3  * Definitions for virtio-pmem devices.
   4  *
   5  * Copyright (C) 2019 Red Hat, Inc.
   6  *
   7  * Author(s): Pankaj Gupta <pagupta@redhat.com>
   8  */
   9
  10 #ifndef _LINUX_VIRTIO_PMEM_H
  11 #define _LINUX_VIRTIO_PMEM_H
  12
  13 #include "standard-headers/linux/types.h"
  14 #include "standard-headers/linux/virtio_ids.h"
  15 #include "standard-headers/linux/virtio_config.h"
  16
  17 /* Feature bits */
  18 /* guest physical address range will be indicated as shared memory region 0 */
  19 #define VIRTIO_PMEM_F_SHMEM_REGION 0
  20
  21 /* shmid of the shared memory region corresponding to the pmem */
  22 #define VIRTIO_PMEM_SHMEM_REGION_ID 0
  23
  24 struct virtio_pmem_config {
  25         uint64_t start;
  26         uint64_t size;
  27 };
  28
  29 #define VIRTIO_PMEM_REQ_TYPE_FLUSH      0
  30
  31 struct virtio_pmem_resp {
  32         /* Host return status corresponding to flush request */
  33         uint32_t ret;
  34 };
  35
  36 struct virtio_pmem_req {
  37         /* command type */
  38         uint32_t type;
  39 };
  40
  41 #endif