2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
20 #include <palacios/vmm.h>
21 #include <palacios/vmm_dev_mgr.h>
32 static uint64_t blk_get_capacity(void * private_data) {
33 struct blk_state * blk = (struct blk_state *)private_data;
35 PrintDebug("SymBlk: Getting Capacity %d\n", (uint32_t)(blk->capacity));
42 static int blk_read(uint8_t * buf, uint64_t lba, uint64_t num_bytes, void * private_data) {
43 struct blk_state * blk = (struct blk_state *)private_data;
45 if (lba + num_bytes > blk->capacity) {
46 PrintError("TMPDISK Read past end of disk\n");
50 memcpy(buf, blk->blk_space + lba, num_bytes);
58 static int blk_write(uint8_t * buf, uint64_t lba, uint64_t num_bytes, void * private_data) {
59 struct blk_state * blk = (struct blk_state *)private_data;
61 if (lba + num_bytes > blk->capacity) {
62 PrintError("TMPDISK Write past end of disk\n");
66 memcpy(blk->blk_space + lba, buf, num_bytes);
72 static int blk_free(struct vm_device * dev) {
77 static struct v3_dev_blk_ops blk_ops = {
80 .get_capacity = blk_get_capacity,
85 static struct v3_device_ops dev_ops = {
95 static int blk_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
96 struct blk_state * blk = NULL;
97 v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
98 char * name = v3_cfg_val(cfg, "name");
99 uint64_t capacity = atoi(v3_cfg_val(cfg, "size")) * 1024 * 1024;
102 PrintError("Frontend Configuration not present\n");
106 PrintDebug("Intializing TMPDISK (capacity=%d)\n", (uint32_t)capacity);
109 blk = (struct blk_state *)V3_Malloc(sizeof(struct blk_state));
111 blk->capacity = capacity;
113 blk->blk_base_addr = (addr_t)V3_AllocPages(blk->capacity / 4096);
114 blk->blk_space = (uint8_t *)V3_VAddr((void *)(blk->blk_base_addr));
115 memset(blk->blk_space, 0, capacity);
118 struct vm_device * dev = v3_allocate_device(name, &dev_ops, blk);
120 if (v3_attach_device(vm, dev) == -1) {
121 PrintError("Could not attach device %s\n", name);
125 if (v3_dev_connect_blk(vm, v3_cfg_val(frontend_cfg, "tag"),
126 &blk_ops, frontend_cfg, blk) == -1) {
127 PrintError("Could not connect %s to frontend %s\n",
128 name, v3_cfg_val(frontend_cfg, "tag"));
136 device_register("TMPDISK", blk_init)