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virtio_pmem.h (881B) - Raw

      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 <linux/types.h>
     14 #include <linux/virtio_ids.h>
     15 #include <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 	__le64 start;
     26 	__le64 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 	__le32 ret;
     34 };
     35 
     36 struct virtio_pmem_req {
     37 	/* command type */
     38 	__le32 type;
     39 };
     40 
     41 #endif