palacios/src/geekos/vm.c

   1 #include <geekos/vmm_stubs.h>
   2 #include <palacios/vmm.h>
   3 #include <geekos/debug.h>
   4 #include <geekos/serial.h>
   5 #include <geekos/vm.h>
   6 #include <geekos/screen.h>
   7
   8 #include <devices/nvram.h>
   9 #include <devices/timer.h>
  10 #include <devices/simple_pic.h>
  11 #include <devices/8259a.h>
  12 #include <devices/keyboard.h>
  13
  14 #include <palacios/vmm_intr.h>
  15 #include <palacios/vmm_dev_mgr.h>
  16
  17 #define SPEAKER_PORT 0x61
  18
  19
  20
  21
  22 inline void VM_Out_Byte(ushort_t port, uchar_t value)
  23 {
  24     __asm__ __volatile__ (
  25         "outb %b0, %w1"
  26         :
  27         : "a" (value), "Nd" (port)
  28     );
  29 }
  30
  31 /*
  32  * Read a byte from an I/O port.
  33  */
  34 inline uchar_t VM_In_Byte(ushort_t port)
  35 {
  36     uchar_t value;
  37
  38     __asm__ __volatile__ (
  39         "inb %w1, %b0"
  40         : "=a" (value)
  41         : "Nd" (port)
  42     );
  43
  44     return value;
  45 }
  46
  47
  48
  49 int IO_Read(ushort_t port, void * dst, uint_t length, void * priv_data) {
  50
  51   if (length != 1) {
  52     return 0;
  53   }
  54
  55   *(uchar_t*)dst = VM_In_Byte(port);
  56   return 1;
  57 }
  58
  59
  60
  61 int IO_Write(ushort_t port, void * src, uint_t length, void * priv_data) {
  62
  63   if (length != 1) {
  64     return 0;
  65   }
  66
  67   VM_Out_Byte(port, *(uchar_t *)src);
  68
  69   return 1;
  70 }
  71
  72
  73 int IO_Read_to_Serial(ushort_t port, void * dst, uint_t length, void * priv_data) {
  74   PrintBoth("Input from Guest on port %d (0x%x) Length=%d\n", port, port, length);
  75
  76   return 0;
  77 }
  78
  79
  80 char * bochs_debug_buf = NULL;
  81 int bochs_debug_offset = 0;
  82
  83
  84 int IO_BOCHS_debug(ushort_t port, void * src, uint_t length, void * priv_data) {
  85   if (!bochs_debug_buf) {
  86     bochs_debug_buf = (char*)Malloc(1024);
  87   }
  88
  89   bochs_debug_buf[bochs_debug_offset++] = *(char*)src;
  90
  91   if ((*(char*)src == 0xa) ||  (bochs_debug_offset == 1023)) {
  92     SerialPrint("BOCHS>%s", bochs_debug_buf);
  93     memset(bochs_debug_buf, 0, 1024);
  94     bochs_debug_offset = 0;
  95   }
  96
  97   return length;
  98 }
  99
 100
 101 int IO_Write_to_Serial(ushort_t port, void * src, uint_t length, void * priv_data) {
 102  SerialPrint("Output from Guest on port %d (0x%x) Length=%d\n", port, port, length);
 103   switch (length) {
 104
 105   case 1:
 106     SerialPrint(">0x%.2x\n", *(char*)src);
 107     break;
 108   case 2:
 109     SerialPrint(">0x%.4x\n", *(ushort_t*)src);
 110     break;
 111   case 4:
 112     SerialPrint(">0x%.8x\n", *(uint_t*)src);
 113     break;
 114   default:
 115     break;
 116   }
 117
 118   //  SerialMemDump(src, length);
 119   return length;
 120 }
 121
 122
 123
 124 void BuzzVM()
 125 {
 126   int x;
 127   int j;
 128   unsigned char init;
 129
 130 #if 0
 131   __asm__ __volatile__ (
 132     "popf"
 133     );
 134
 135 #endif
 136
 137   PrintBoth("Starting To Buzz\n");
 138
 139   init=VM_In_Byte(SPEAKER_PORT);
 140
 141   while (1) {
 142     VM_Out_Byte(SPEAKER_PORT, init|0x2);
 143     for (j=0;j<1000000;j++) {
 144       x+=j;
 145     }
 146     VM_Out_Byte(SPEAKER_PORT, init);
 147     for (j=0;j<1000000;j++) {
 148       x+=j;
 149     }
 150   }
 151 }
 152
 153
 154
 155
 156 /* We need a configuration mechanism, so we can wrap this completely inside the VMM code,
 157  * with no pollution into the HOST OS
 158  */
 159
 160 int RunVMM(struct Boot_Info * bootInfo) {
 161
 162     struct vmm_os_hooks os_hooks;
 163     struct vmm_ctrl_ops vmm_ops;
 164     struct guest_info vm_info;
 165     addr_t rsp;
 166     addr_t rip;
 167
 168
 169
 170     memset(&os_hooks, 0, sizeof(struct vmm_os_hooks));
 171     memset(&vmm_ops, 0, sizeof(struct vmm_ctrl_ops));
 172     memset(&vm_info, 0, sizeof(struct guest_info));
 173
 174     os_hooks.print_debug = &SerialPrint;
 175     os_hooks.print_info = &Print;
 176     os_hooks.print_trace = &SerialPrint;
 177     os_hooks.allocate_pages = &Allocate_VMM_Pages;
 178     os_hooks.free_page = &Free_VMM_Page;
 179     os_hooks.malloc = &VMM_Malloc;
 180     os_hooks.free = &VMM_Free;
 181     os_hooks.vaddr_to_paddr = &Identity;
 182     os_hooks.paddr_to_vaddr = &Identity;
 183     os_hooks.hook_interrupt = &hook_irq_stub;
 184     os_hooks.ack_irq = &ack_irq;
 185
 186
 187     Init_VMM(&os_hooks, &vmm_ops);
 188
 189
 190     /* MOVE THIS TO AN INIT GUEST ROUTINE */
 191     init_shadow_map(&(vm_info.mem_map));
 192     init_shadow_page_state(&(vm_info.shdw_pg_state));
 193     vm_info.page_mode = SHADOW_PAGING;
 194
 195     vm_info.cpu_mode = REAL;
 196
 197     //init_irq_map(&(vm_info.irq_map));
 198     init_vmm_io_map(&(vm_info.io_map));
 199     init_interrupt_state(&vm_info);
 200
 201     dev_mgr_init(&(vm_info.dev_mgr));
 202     /* ** */
 203
 204     if (0) {
 205
 206       //    add_shared_mem_range(&(vm_info.mem_layout), 0, 0x800000, 0x10000);
 207       //    add_shared_mem_range(&(vm_info.mem_layout), 0, 0x1000000, 0);
 208
 209       rip = (ulong_t)(void*)&BuzzVM;
 210       //  rip -= 0x10000;
 211       //    rip = (addr_t)(void*)&exit_test;
 212       //  rip -= 0x2000;
 213       vm_info.rip = rip;
 214       rsp = (addr_t)Alloc_Page();
 215
 216       vm_info.vm_regs.rsp = (rsp +4092 );// - 0x2000;
 217
 218
 219     } else if (0) {
 220       //add_shared_mem_range(&(vm_info.mem_layout), 0x0, 0x1000, 0x100000);
 221       //      add_shared_mem_range(&(vm_info.mem_layout), 0x0, 0x100000, 0x0);
 222
 223       /*
 224         shadow_region_t *ent = Malloc(sizeof(shadow_region_t));;
 225         init_shadow_region_physical(ent,0,0x100000,GUEST_REGION_PHYSICAL_MEMORY,
 226         0x100000, HOST_REGION_PHYSICAL_MEMORY);
 227         add_shadow_region(&(vm_info.mem_map),ent);
 228       */
 229
 230       add_shadow_region_passthrough(&vm_info, 0x0, 0x100000, 0x100000);
 231
 232       hook_io_port(&(vm_info.io_map), 0x61, &IO_Read, &IO_Write, NULL);
 233       hook_io_port(&(vm_info.io_map), 0x05, &IO_Read, &IO_Write_to_Serial, NULL);
 234
 235       /*
 236         vm_info.cr0 = 0;
 237         vm_info.cs.base=0xf000;
 238         vm_info.cs.limit=0xffff;
 239       */
 240       //vm_info.rip = 0xfff0;
 241
 242       vm_info.rip = 0;
 243       vm_info.vm_regs.rsp = 0x0;
 244     } else {
 245       int i;
 246       void * region_start;
 247
 248
 249       PrintBoth("Guest Size: %lu\n", bootInfo->guest_size);
 250
 251       struct guest_mem_layout * layout = (struct guest_mem_layout *)0x100000;
 252
 253       if (layout->magic != MAGIC_CODE) {
 254         PrintBoth("Layout Magic Mismatch (0x%x)\n", layout->magic);
 255       }
 256
 257       PrintBoth("%d layout regions\n", layout->num_regions);
 258
 259       region_start = (void *)&(layout->regions[layout->num_regions]);
 260
 261       PrintBoth("region start = 0x%x\n", region_start);
 262
 263       for (i = 0; i < layout->num_regions; i++) {
 264         struct layout_region * reg = &(layout->regions[i]);
 265         uint_t num_pages = (reg->length / PAGE_SIZE) + ((reg->length % PAGE_SIZE) ? 1 : 0);
 266         void * guest_mem = Allocate_VMM_Pages(num_pages);
 267
 268         PrintBoth("Layout Region %d bytes\n", reg->length);
 269         memcpy(guest_mem, region_start, reg->length);
 270
 271         SerialMemDump((unsigned char *)(guest_mem), 16);
 272
 273         add_shadow_region_passthrough(&vm_info, reg->final_addr, reg->final_addr + (num_pages * PAGE_SIZE), (addr_t)guest_mem);
 274
 275         PrintBoth("Adding Shadow Region (0x%x-0x%x) -> 0x%x\n", reg->final_addr, reg->final_addr + (num_pages * PAGE_SIZE), guest_mem);
 276
 277         region_start += reg->length;
 278       }
 279
 280       //
 281       add_shadow_region_passthrough(&vm_info, 0x0, 0xa0000, (addr_t)Allocate_VMM_Pages(160));
 282       add_shadow_region_passthrough(&vm_info, 0xa0000, 0xc0000, 0xa0000);
 283
 284
 285
 286       // TEMP
 287       //add_shadow_region_passthrough(&vm_info, 0xc0000, 0xc8000, 0xc0000);
 288
 289       if (1) {
 290         add_shadow_region_passthrough(&vm_info, 0xc7000, 0xc8000, (addr_t)Allocate_VMM_Pages(1));
 291         if (add_shadow_region_passthrough(&vm_info, 0xc8000, 0xf0000, (addr_t)Allocate_VMM_Pages(40)) == -1) {
 292           PrintBoth("Error adding shadow region\n");
 293         }
 294       } else {
 295         add_shadow_region_passthrough(&vm_info, 0xc0000, 0xc8000, 0xc0000);
 296         add_shadow_region_passthrough(&vm_info, 0xc8000, 0xf0000, 0xc8000);
 297       }
 298
 299
 300       //add_shadow_region_passthrough(&vm_info, 0x100000, 0x2000000, (addr_t)Allocate_VMM_Pages(8192));
 301       add_shadow_region_passthrough(&vm_info, 0x100000, 0x1000000, (addr_t)Allocate_VMM_Pages(4096));
 302
 303
 304       print_shadow_map(&(vm_info.mem_map));
 305
 306       hook_io_port(&(vm_info.io_map), 0x61, &IO_Read, &IO_Write, NULL);
 307       hook_io_port(&(vm_info.io_map), 0x05, &IO_Read, &IO_Write_to_Serial, NULL);
 308
 309
 310       hook_io_port(&(vm_info.io_map), 0x400, &IO_Read, &IO_Write_to_Serial, NULL);
 311       hook_io_port(&(vm_info.io_map), 0x401, &IO_Read, &IO_Write_to_Serial, NULL);
 312       hook_io_port(&(vm_info.io_map), 0x402, &IO_Read, &IO_BOCHS_debug, NULL);
 313       hook_io_port(&(vm_info.io_map), 0x403, &IO_Read, &IO_Write_to_Serial, NULL);
 314
 315       {
 316         struct vm_device * nvram = create_nvram();
 317         //struct vm_device * timer = create_timer();
 318         struct vm_device * pic = create_pic();
 319         struct vm_device * keyboard = create_keyboard();
 320
 321         attach_device(&(vm_info), nvram);
 322         //attach_device(&(vm_info), timer);
 323         attach_device(&(vm_info), pic);
 324         attach_device(&(vm_info), keyboard);
 325
 326         PrintDebugDevMgr(&(vm_info.dev_mgr));
 327       }
 328
 329       // give keyboard interrupts to vm
 330       //hook_irq(&vm_info, 1);
 331
 332       // give floppy controller to vm
 333       hook_irq(&vm_info, 6);
 334
 335       // primary ide
 336       hook_irq(&vm_info, 14);
 337
 338       // secondary ide
 339       hook_irq(&vm_info, 15);
 340
 341
 342       vm_info.rip = 0xfff0;
 343       vm_info.vm_regs.rsp = 0x0;
 344     }
 345
 346     PrintBoth("Initializing Guest (eip=0x%.8x) (esp=0x%.8x)\n", (uint_t)vm_info.rip,(uint_t)vm_info.vm_regs.rsp);
 347     (vmm_ops).init_guest(&vm_info);
 348     PrintBoth("Starting Guest\n");
 349     //Clear_Screen();
 350     (vmm_ops).start_guest(&vm_info);
 351
 352     return 0;
 353 }