kitten/palacios-glue/vmm_stubs.c

   1 /*
   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.
   5  *
   6  * The V3VEE Project is a joint project between Northwestern University
   7  * and the University of New Mexico.  You can find out more at
   8  * http://www.v3vee.org
   9  *
  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.
  13  *
  14  * Author: Jack Lange <jarusl@cs.northwestern.edu>
  15  *
  16  * This is free software.  You are permitted to use,
  17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
  18  */
  19
  20 #include <lwk/palacios.h>
  21 #include <lwk/types.h>
  22 #include <lwk/pmem.h>
  23 #include <lwk/string.h>
  24 #include <lwk/cpuinfo.h>
  25 #include <lwk/kernel.h>
  26 #include <arch/page.h>
  27 #include <arch/ptrace.h>
  28 #include <arch/apic.h>
  29
  30 struct guest_info * g_vm_guest = NULL;
  31
  32
  33 // This is the function the interface code should call to deliver
  34 // the interrupt to the vmm for handling
  35 //extern int v3_deliver_interrupt(struct guest_info * vm, struct v3_interrupt *intr);
  36
  37
  38 struct guest_info * irq_to_guest_map[256];
  39
  40
  41
  42
  43
  44 void
  45 v3vee_init_stubs(
  46         struct guest_info * info
  47 )
  48 {
  49         memset(irq_to_guest_map, 0, sizeof(struct guest_info *) * 256);
  50         g_vm_guest = info;
  51 }
  52
  53
  54 static void *
  55 kitten_pa_to_va(void *ptr)
  56 {
  57         return (void*) __va(ptr);
  58 }
  59
  60
  61 static void *
  62 kitten_va_to_pa(
  63         void *                  ptr
  64 )
  65 {
  66         return (void*) __pa(ptr);
  67 }
  68
  69
  70 static void *
  71 Allocate_VMM_Pages(
  72         int                     num_pages
  73 )
  74 {
  75         struct pmem_region result;
  76
  77         int rc = pmem_alloc_umem( num_pages*PAGE_SIZE,PAGE_SIZE, &result );
  78         if( rc )
  79                 return 0;
  80
  81         return result.start;
  82 }
  83
  84 static void
  85 Free_VMM_Page(
  86         void *                  page
  87 )
  88 {
  89         struct pmem_region      query;
  90         struct pmem_region      result;
  91
  92         pmem_region_unset_all(&query);
  93
  94         query.start     = page;
  95         query.end       = page+PAGE_SIZE;
  96
  97         int rc = pmem_query(&query,&result);
  98
  99         if (rc)
 100                 panic( "BAD" );
 101
 102         result.allocated = 0;
 103         pmem_update(&result);
 104 }
 105
 106
 107
 108 void
 109 send_key_to_vmm(
 110         unsigned char           status,
 111         unsigned char           scancode
 112 )
 113 {
 114         if( !g_vm_guest )
 115                 return;
 116
 117         struct v3_keyboard_event evt = {
 118                 .status         = status,
 119                 .scan_code      = scancode,
 120         };
 121
 122         v3_deliver_keyboard_event( g_vm_guest, &evt );
 123 }
 124
 125
 126 void
 127 send_mouse_to_vmm(
 128         unsigned char           packet[3]
 129 )
 130 {
 131         if( !g_vm_guest )
 132                 return;
 133
 134         struct v3_mouse_event evt;
 135         memcpy(evt.data, packet, 3);
 136
 137         v3_deliver_mouse_event(g_vm_guest, &evt);
 138 }
 139
 140
 141 void
 142 send_tick_to_vmm(
 143         unsigned int            period_us
 144 )
 145 {
 146         if( !g_vm_guest )
 147                 return;
 148
 149         struct v3_timer_event evt = {
 150                 .period_us      = period_us,
 151         };
 152
 153         v3_deliver_timer_event( g_vm_guest, &evt );
 154 }
 155
 156
 157 void
 158 translate_intr_handler(
 159         struct pt_regs *        regs,
 160         unsigned int            vector
 161 )
 162 {
 163         struct v3_interrupt intr = {
 164                 .irq            = vector-32,
 165                 .error          = regs->orig_rax,
 166                 .should_ack     = 0,
 167         };
 168
 169         //  PrintBoth("translate_intr_handler: opaque=0x%x\n",mystate.opaque);
 170         v3_deliver_irq( irq_to_guest_map[intr.irq], &intr );
 171 }
 172
 173
 174 int
 175 kitten_hook_interrupt(
 176         struct guest_info *     vm,
 177         unsigned int            irq
 178 )
 179 {
 180         if( irq_to_guest_map[irq] ) {
 181                 //PrintBoth("Attempt to hook interrupt that is already hooked\n");
 182                 return -1;
 183         }
 184
 185         //PrintBoth("Hooked interrupt 0x%x with opaque 0x%x\n", irq, vm);
 186         irq_to_guest_map[irq] = vm;
 187
 188         set_idtvec_handler( irq, translate_intr_handler );
 189         return 0;
 190 }
 191
 192
 193 static int
 194 ack_irq(
 195         int                     irq
 196 )
 197 {
 198         lapic_ack_interrupt();
 199         return 0;
 200 }
 201
 202
 203 static unsigned int
 204 get_cpu_khz( void )
 205 {
 206         return cpu_info[0].arch.cur_cpu_khz;
 207 }
 208
 209
 210 struct v3_os_hooks v3vee_os_hooks = {
 211         .print_debug            = printk,  // serial print ideally
 212         .print_info             = printk,   // serial print ideally
 213         .print_trace            = printk,  // serial print ideally
 214         .allocate_pages         = Allocate_VMM_Pages, // defined in vmm_stubs
 215         .free_page              = Free_VMM_Page, // defined in vmm_stubs
 216         .malloc                 = kmem_alloc,
 217         .free                   = kmem_free,
 218         .vaddr_to_paddr         = kitten_va_to_pa,
 219         .paddr_to_vaddr         = kitten_pa_to_va,
 220         .hook_interrupt         = kitten_hook_interrupt,
 221         .ack_irq                = ack_irq,
 222         .get_cpu_khz            = get_cpu_khz,
 223 };
 224