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/generic.h>
   9 #include <devices/nvram.h>
  10 #include <devices/timer.h>
  11 #include <devices/simple_pic.h>
  12 #include <devices/8259a.h>
  13 #include <devices/8254.h>
  14 #include <devices/keyboard.h>
  15
  16 #include <palacios/vmm_intr.h>
  17 #include <palacios/vmm_dev_mgr.h>
  18 #include <palacios/vmm_time.h>
  19
  20 #define SPEAKER_PORT 0x61
  21
  22 static 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 static 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
  50 int IO_Read(ushort_t port, void * dst, uint_t length, void * priv_data) {
  51
  52   if (length != 1) {
  53     return 0;
  54   }
  55
  56   *(uchar_t*)dst = VM_In_Byte(port);
  57   return 1;
  58 }
  59
  60
  61
  62 int IO_Write(ushort_t port, void * src, uint_t length, void * priv_data) {
  63
  64   if (length != 1) {
  65     return 0;
  66   }
  67
  68   VM_Out_Byte(port, *(uchar_t *)src);
  69
  70   return 1;
  71 }
  72
  73
  74 int IO_Read_to_Serial(ushort_t port, void * dst, uint_t length, void * priv_data) {
  75   PrintBoth("Input from Guest on port %d (0x%x) Length=%d\n", port, port, length);
  76
  77   return 0;
  78 }
  79
  80
  81 char * bochs_debug_buf = NULL;
  82 int bochs_debug_offset = 0;
  83
  84
  85 int IO_BOCHS_debug(ushort_t port, void * src, uint_t length, void * priv_data) {
  86   if (!bochs_debug_buf) {
  87     bochs_debug_buf = (char*)Malloc(1024);
  88   }
  89
  90   bochs_debug_buf[bochs_debug_offset++] = *(char*)src;
  91
  92   if ((*(char*)src == 0xa) ||  (bochs_debug_offset == 1023)) {
  93     SerialPrint("BOCHS>%s", bochs_debug_buf);
  94     memset(bochs_debug_buf, 0, 1024);
  95     bochs_debug_offset = 0;
  96   }
  97
  98   return length;
  99 }
 100
 101
 102 int IO_Write_to_Serial(ushort_t port, void * src, uint_t length, void * priv_data) {
 103  SerialPrint("Output from Guest on port %d (0x%x) Length=%d\n", port, port, length);
 104   switch (length) {
 105
 106   case 1:
 107     SerialPrint(">0x%.2x\n", *(char*)src);
 108     break;
 109   case 2:
 110     SerialPrint(">0x%.4x\n", *(ushort_t*)src);
 111     break;
 112   case 4:
 113     SerialPrint(">0x%.8x\n", *(uint_t*)src);
 114     break;
 115   default:
 116     break;
 117   }
 118
 119   //  SerialMemDump(src, length);
 120   return length;
 121 }
 122
 123
 124
 125 void BuzzVM()
 126 {
 127   int x;
 128   int j;
 129   unsigned char init;
 130
 131 #if 0
 132   __asm__ __volatile__ (
 133     "popf"
 134     );
 135
 136 #endif
 137
 138   PrintBoth("Starting To Buzz\n");
 139
 140   init=VM_In_Byte(SPEAKER_PORT);
 141
 142   while (1) {
 143     VM_Out_Byte(SPEAKER_PORT, init|0x2);
 144     for (j=0;j<1000000;j++) {
 145       x+=j;
 146     }
 147     VM_Out_Byte(SPEAKER_PORT, init);
 148     for (j=0;j<1000000;j++) {
 149       x+=j;
 150     }
 151   }
 152 }
 153
 154
 155
 156 int passthrough_mem_read(addr_t guest_addr, void * dst, uint_t length, void * priv_data) {
 157   memcpy(dst, (void*)guest_addr, length);
 158   return length;
 159 }
 160
 161 int passthrough_mem_write(addr_t guest_addr, void * src, uint_t length, void * priv_data) {
 162   memcpy((void*)guest_addr, src, length);
 163   return length;
 164 }
 165
 166
 167
 168 /* We need a configuration mechanism, so we can wrap this completely inside the VMM code,
 169  * with no pollution into the HOST OS
 170  */
 171
 172 int RunVMM(struct Boot_Info * bootInfo) {
 173
 174     struct vmm_os_hooks os_hooks;
 175     struct vmm_ctrl_ops vmm_ops;
 176     struct guest_info vm_info;
 177     addr_t rsp;
 178     addr_t rip;
 179
 180
 181
 182     memset(&os_hooks, 0, sizeof(struct vmm_os_hooks));
 183     memset(&vmm_ops, 0, sizeof(struct vmm_ctrl_ops));
 184     memset(&vm_info, 0, sizeof(struct guest_info));
 185
 186     os_hooks.print_debug = &SerialPrint;
 187     os_hooks.print_info = &Print;
 188     os_hooks.print_trace = &SerialPrint;
 189     os_hooks.allocate_pages = &Allocate_VMM_Pages;
 190     os_hooks.free_page = &Free_VMM_Page;
 191     os_hooks.malloc = &VMM_Malloc;
 192     os_hooks.free = &VMM_Free;
 193     os_hooks.vaddr_to_paddr = &Identity;
 194     os_hooks.paddr_to_vaddr = &Identity;
 195     os_hooks.hook_interrupt = &hook_irq_stub;
 196     os_hooks.ack_irq = &ack_irq;
 197     os_hooks.get_cpu_khz = &get_cpu_khz;
 198
 199     Init_VMM(&os_hooks, &vmm_ops);
 200
 201
 202     /* MOVE THIS TO AN INIT GUEST ROUTINE */
 203     init_shadow_map(&(vm_info.mem_map));
 204     init_shadow_page_state(&(vm_info.shdw_pg_state));
 205     v3_init_time(&(vm_info.time_state));
 206     vm_info.page_mode = SHADOW_PAGING;
 207
 208     vm_info.cpu_mode = REAL;
 209
 210     //init_irq_map(&(vm_info.irq_map));
 211     init_vmm_io_map(&(vm_info.io_map));
 212     init_interrupt_state(&vm_info);
 213
 214     dev_mgr_init(&(vm_info.dev_mgr));
 215     /* ** */
 216
 217     if (0) {
 218
 219       //    add_shared_mem_range(&(vm_info.mem_layout), 0, 0x800000, 0x10000);
 220       //    add_shared_mem_range(&(vm_info.mem_layout), 0, 0x1000000, 0);
 221
 222       rip = (ulong_t)(void*)&BuzzVM;
 223       //  rip -= 0x10000;
 224       //    rip = (addr_t)(void*)&exit_test;
 225       //  rip -= 0x2000;
 226       vm_info.rip = rip;
 227       rsp = (addr_t)Alloc_Page();
 228
 229       vm_info.vm_regs.rsp = (rsp +4092 );// - 0x2000;
 230
 231
 232     } else if (0) {
 233       //add_shared_mem_range(&(vm_info.mem_layout), 0x0, 0x1000, 0x100000);
 234       //      add_shared_mem_range(&(vm_info.mem_layout), 0x0, 0x100000, 0x0);
 235
 236       /*
 237         shadow_region_t *ent = Malloc(sizeof(shadow_region_t));;
 238         init_shadow_region_physical(ent,0,0x100000,GUEST_REGION_PHYSICAL_MEMORY,
 239         0x100000, HOST_REGION_PHYSICAL_MEMORY);
 240         add_shadow_region(&(vm_info.mem_map),ent);
 241       */
 242
 243       add_shadow_region_passthrough(&vm_info, 0x0, 0x100000, 0x100000);
 244
 245       hook_io_port(&(vm_info.io_map), 0x61, &IO_Read, &IO_Write, NULL);
 246       hook_io_port(&(vm_info.io_map), 0x05, &IO_Read, &IO_Write_to_Serial, NULL);
 247
 248       /*
 249         vm_info.cr0 = 0;
 250         vm_info.cs.base=0xf000;
 251         vm_info.cs.limit=0xffff;
 252       */
 253       //vm_info.rip = 0xfff0;
 254
 255       vm_info.rip = 0;
 256       vm_info.vm_regs.rsp = 0x0;
 257     } else {
 258       int i;
 259       void * region_start;
 260
 261
 262       PrintBoth("Guest Size: %lu\n", bootInfo->guest_size);
 263
 264       struct guest_mem_layout * layout = (struct guest_mem_layout *)0x100000;
 265
 266       if (layout->magic != MAGIC_CODE) {
 267         PrintBoth("Layout Magic Mismatch (0x%x)\n", layout->magic);
 268       }
 269
 270       PrintBoth("%d layout regions\n", layout->num_regions);
 271
 272       region_start = (void *)&(layout->regions[layout->num_regions]);
 273
 274       PrintBoth("region start = 0x%x\n", region_start);
 275
 276       for (i = 0; i < layout->num_regions; i++) {
 277         struct layout_region * reg = &(layout->regions[i]);
 278         uint_t num_pages = (reg->length / PAGE_SIZE) + ((reg->length % PAGE_SIZE) ? 1 : 0);
 279         void * guest_mem = Allocate_VMM_Pages(num_pages);
 280
 281         PrintBoth("Layout Region %d bytes\n", reg->length);
 282         memcpy(guest_mem, region_start, reg->length);
 283
 284         SerialMemDump((unsigned char *)(guest_mem), 16);
 285
 286         add_shadow_region_passthrough(&vm_info, reg->final_addr, reg->final_addr + (num_pages * PAGE_SIZE), (addr_t)guest_mem);
 287
 288         PrintBoth("Adding Shadow Region (0x%x-0x%x) -> 0x%x\n", reg->final_addr, reg->final_addr + (num_pages * PAGE_SIZE), guest_mem);
 289
 290         region_start += reg->length;
 291       }
 292
 293       //
 294       add_shadow_region_passthrough(&vm_info, 0x0, 0xa0000, (addr_t)Allocate_VMM_Pages(160));
 295
 296       add_shadow_region_passthrough(&vm_info, 0xa0000, 0xc0000, 0xa0000);
 297       //hook_guest_mem(&vm_info, 0xa0000, 0xc0000, passthrough_mem_read, passthrough_mem_write, NULL);
 298
 299
 300       // TEMP
 301       //add_shadow_region_passthrough(&vm_info, 0xc0000, 0xc8000, 0xc0000);
 302
 303       if (1) {
 304         add_shadow_region_passthrough(&vm_info, 0xc7000, 0xc8000, (addr_t)Allocate_VMM_Pages(1));
 305         if (add_shadow_region_passthrough(&vm_info, 0xc8000, 0xf0000, (addr_t)Allocate_VMM_Pages(40)) == -1) {
 306           PrintBoth("Error adding shadow region\n");
 307         }
 308       } else {
 309         add_shadow_region_passthrough(&vm_info, 0xc0000, 0xc8000, 0xc0000);
 310         add_shadow_region_passthrough(&vm_info, 0xc8000, 0xf0000, 0xc8000);
 311       }
 312
 313
 314       //add_shadow_region_passthrough(&vm_info, 0x100000, 0x2000000, (addr_t)Allocate_VMM_Pages(8192));
 315       add_shadow_region_passthrough(&vm_info, 0x100000, 0x1000000, (addr_t)Allocate_VMM_Pages(4096));
 316
 317
 318       print_shadow_map(&(vm_info.mem_map));
 319
 320       hook_io_port(&(vm_info.io_map), 0x61, &IO_Read, &IO_Write, NULL);
 321       //hook_io_port(&(vm_info.io_map), 0x05, &IO_Read, &IO_Write_to_Serial, NULL);
 322
 323
 324       hook_io_port(&(vm_info.io_map), 0x400, &IO_Read, &IO_Write_to_Serial, NULL);
 325       hook_io_port(&(vm_info.io_map), 0x401, &IO_Read, &IO_Write_to_Serial, NULL);
 326       hook_io_port(&(vm_info.io_map), 0x402, &IO_Read, &IO_BOCHS_debug, NULL);
 327       hook_io_port(&(vm_info.io_map), 0x403, &IO_Read, &IO_Write_to_Serial, NULL);
 328
 329       {
 330
 331         struct vm_device * nvram = create_nvram();
 332         //struct vm_device * timer = create_timer();
 333         struct vm_device * pic = create_pic();
 334         struct vm_device * keyboard = create_keyboard();
 335         struct vm_device * pit = create_pit();
 336
 337         //generic_port_range_type range = {0,1024} ; // hook first 1024 ports if not already hooked
 338
 339         //struct vm_device * generic = create_generic(&range, 1, NULL, 0, NULL, 0);
 340
 341
 342         attach_device(&(vm_info), nvram);
 343         //attach_device(&(vm_info), timer);
 344         attach_device(&(vm_info), pic);
 345         attach_device(&(vm_info), pit);
 346         attach_device(&(vm_info), keyboard);
 347
 348         // Important that this be attached last!
 349         //attach_device(&(vm_info), generic);
 350
 351         PrintDebugDevMgr(&(vm_info.dev_mgr));
 352       }
 353
 354       // give keyboard interrupts to vm
 355       //hook_irq(&vm_info, 1);
 356
 357       // give floppy controller to vm
 358       //hook_irq(&vm_info, 6);
 359
 360       // primary ide
 361       //hook_irq(&vm_info, 14);
 362
 363       // secondary ide
 364       //hook_irq(&vm_info, 15);
 365
 366
 367       vm_info.rip = 0xfff0;
 368       vm_info.vm_regs.rsp = 0x0;
 369     }
 370
 371     PrintBoth("Initializing Guest (eip=0x%.8x) (esp=0x%.8x)\n", (uint_t)vm_info.rip,(uint_t)vm_info.vm_regs.rsp);
 372     (vmm_ops).init_guest(&vm_info);
 373     PrintBoth("Starting Guest\n");
 374     //Clear_Screen();
 375     (vmm_ops).start_guest(&vm_info);
 376
 377     return 0;
 378 }