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, Andy Gocke <agocke@gmail.com>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Andy Gocke <agocke@gmail.com>
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/vmx_io.h>
21 #include <palacios/vmm_io.h>
22 #include <palacios/vmm.h>
23 #include <palacios/vmx_handler.h>
24 #include <palacios/vmm_ctrl_regs.h>
25 #include <palacios/vm_guest_mem.h>
26 #include <palacios/vmm_decoder.h>
28 #ifndef V3_CONFIG_DEBUG_IO
30 #define PrintDebug(fmt, args...)
35 static int update_map(struct v3_vm_info * vm, uint16_t port, int hook_read, int hook_write) {
36 uint8_t * bitmap = (uint8_t *)(vm->io_map.arch_data);
40 if ((hook_read == 0) && (hook_write == 0)) {
41 *(bitmap + major) &= ~(0x1 << minor);
43 *(bitmap + major) |= (0x1 << minor);
49 int v3_init_vmx_io_map(struct v3_vm_info * vm) {
50 vm->io_map.update_map = update_map;
52 vm->io_map.arch_data = V3_VAddr(V3_AllocPages(2));
53 memset(vm->io_map.arch_data, 0xff, PAGE_SIZE_4KB * 2);
55 v3_refresh_io_map(vm);
60 int v3_deinit_vmx_io_map(struct v3_vm_info * vm) {
61 V3_FreePages(V3_PAddr(vm->io_map.arch_data), 2);
66 int v3_handle_vmx_io_in(struct guest_info * core, struct vmx_exit_info * exit_info) {
67 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);;
68 struct v3_io_hook * hook = NULL;
71 hook = v3_get_io_hook(core->vm_info, io_qual.port);
73 read_size = io_qual.access_size + 1;
75 PrintDebug("IN of %d bytes on port %d (0x%x)\n", read_size, io_qual.port, io_qual.port);
78 PrintDebug("IN operation on unhooked IO port 0x%x - returning zeros\n", io_qual.port);
79 core->vm_regs.rax >>= 8*read_size;
80 core->vm_regs.rax <<= 8*read_size;
83 if (hook->read(core, io_qual.port, &(core->vm_regs.rax), read_size, hook->priv_data) != read_size) {
84 PrintError("Read failure for IN on port %x\n", io_qual.port);
90 core->rip += exit_info->instr_len;
95 int v3_handle_vmx_io_ins(struct guest_info * core, struct vmx_exit_info * exit_info) {
96 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);;
97 struct v3_io_hook * hook = NULL;
99 addr_t guest_va = exit_info->guest_linear_addr;
100 addr_t host_addr = 0;
102 uint32_t rep_num = 1;
103 struct rflags * flags = (struct rflags *)&(core->ctrl_regs.rflags);
105 hook = v3_get_io_hook(core->vm_info, io_qual.port);
108 PrintDebug("INS on port 0x%x\n", io_qual.port);
110 read_size = io_qual.access_size + 1;
113 struct vmx_exit_io_instr_info instr_info = *(struct vmx_exit_io_instr_info *)&(exit_info->instr_info);
115 if (instr_info.addr_size == 0) {
116 rep_num = core->vm_regs.rcx & 0xffff;
117 } else if(instr_info.addr_size == 1) {
118 rep_num = core->vm_regs.rcx & 0xffffffff;
119 } else if(instr_info.addr_size == 2) {
120 rep_num = core->vm_regs.rcx & 0xffffffffffffffffLL;
122 PrintDebug("Unknown INS address size!\n");
128 rdi_change = -read_size;
130 rdi_change = read_size;
133 PrintDebug("INS size=%d for %ld steps\n", read_size, rep_num);
137 if (v3_gva_to_hva(core, guest_va, &host_addr) == -1) {
138 PrintError("Could not convert Guest VA to host VA\n");
145 PrintDebug("INS operation on unhooked IO port 0x%x - returning zeros\n", io_qual.port);
147 memset((char*)host_addr,0,read_size);
150 if (hook->read(core, io_qual.port, (char *)host_addr, read_size, hook->priv_data) != read_size) {
151 PrintError("Read Failure for INS on port 0x%x\n", io_qual.port);
157 host_addr += rdi_change;
158 core->vm_regs.rdi += rdi_change;
164 } while (--rep_num > 0);
167 core->rip += exit_info->instr_len;
174 int v3_handle_vmx_io_out(struct guest_info * core, struct vmx_exit_info * exit_info) {
175 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);
176 struct v3_io_hook * hook = NULL;
179 hook = v3_get_io_hook(core->vm_info, io_qual.port);
182 write_size = io_qual.access_size + 1;
184 PrintDebug("OUT of %d bytes on port %d (0x%x)\n", write_size, io_qual.port, io_qual.port);
187 PrintDebug("OUT operation on unhooked IO port 0x%x - ignored\n", io_qual.port);
189 if (hook->write(core, io_qual.port, &(core->vm_regs.rax), write_size, hook->priv_data) != write_size) {
190 PrintError("Write failure for out on port %x\n",io_qual.port);
195 core->rip += exit_info->instr_len;
202 int v3_handle_vmx_io_outs(struct guest_info * core, struct vmx_exit_info * exit_info) {
203 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);
204 struct v3_io_hook * hook = NULL;
206 addr_t guest_va = exit_info->guest_linear_addr;
209 uint32_t rep_num = 1;
210 struct rflags * flags = (struct rflags *)&(core->ctrl_regs.rflags);
212 hook = v3_get_io_hook(core->vm_info, io_qual.port);
214 PrintDebug("OUTS on port 0x%x\n", io_qual.port);
216 write_size = io_qual.access_size + 1;
219 // Grab the address sized bits of rcx
220 struct vmx_exit_io_instr_info instr_info = *(struct vmx_exit_io_instr_info *)&(exit_info->instr_info);
222 if (instr_info.addr_size == 0) {
223 rep_num = core->vm_regs.rcx & 0xffff;
224 } else if(instr_info.addr_size == 1) {
225 rep_num = core->vm_regs.rcx & 0xffffffff;
226 } else if(instr_info.addr_size == 2) {
227 rep_num = core->vm_regs.rcx & 0xffffffffffffffffLL;
229 PrintDebug("Unknown INS address size!\n");
235 rsi_change = -write_size;
237 rsi_change = write_size;
242 PrintDebug("OUTS size=%d for %ld steps\n", write_size, rep_num);
244 if (v3_gva_to_hva(core, guest_va, &host_addr) == -1) {
245 PrintError("Could not convert guest VA to host VA\n");
252 PrintDebug("OUTS operation on unhooked IO port 0x%x - ignored\n", io_qual.port);
254 if (hook->write(core, io_qual.port, (char *)host_addr, write_size, hook->priv_data) != write_size) {
255 PrintError("Read failure for INS on port 0x%x\n", io_qual.port);
261 host_addr += rsi_change;
262 core->vm_regs.rsi += rsi_change;
268 } while (--rep_num > 0);
271 core->rip += exit_info->instr_len;