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 uchar_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\n", io_qual.port);
80 /* What are the HW semantics for an IN on an invalid port?
81 * Do we need to clear the register value or leave it untouched???
84 if (hook->read(core, io_qual.port, &(core->vm_regs.rax), read_size, hook->priv_data) != read_size) {
85 PrintError("Read failure for IN on port %x\n", io_qual.port);
91 core->rip += exit_info->instr_len;
96 int v3_handle_vmx_io_ins(struct guest_info * core, struct vmx_exit_info * exit_info) {
97 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);;
98 struct v3_io_hook * hook = NULL;
100 addr_t guest_va = exit_info->guest_linear_addr;
101 addr_t host_addr = 0;
104 struct rflags * flags = (struct rflags *)&(core->ctrl_regs.rflags);
106 hook = v3_get_io_hook(core->vm_info, io_qual.port);
109 PrintDebug("INS on port 0x%x\n", io_qual.port);
111 read_size = io_qual.access_size + 1;
114 struct vmx_exit_io_instr_info instr_info = *(struct vmx_exit_io_instr_info *)&(exit_info->instr_info);
116 if (instr_info.addr_size == 0) {
117 rep_num = core->vm_regs.rcx & 0xffff;
118 } else if(instr_info.addr_size == 1) {
119 rep_num = core->vm_regs.rcx & 0xffffffff;
120 } else if(instr_info.addr_size == 2) {
121 rep_num = core->vm_regs.rcx & 0xffffffffffffffffLL;
123 PrintDebug("Unknown INS address size!\n");
129 rdi_change = -read_size;
131 rdi_change = read_size;
134 PrintDebug("INS size=%d for %ld steps\n", read_size, rep_num);
138 if (v3_gva_to_hva(core, guest_va, &host_addr) == -1) {
139 PrintError("Could not convert Guest VA to host VA\n");
146 PrintDebug("INS operation on unhooked IO port 0x%x\n", io_qual.port);
148 /* What are the HW semantics for an INS on an invalid port?
149 * Do we need to clear the memory region or leave it untouched???
152 if (hook->read(core, io_qual.port, (char *)host_addr, read_size, hook->priv_data) != read_size) {
153 PrintError("Read Failure for INS on port 0x%x\n", io_qual.port);
159 host_addr += rdi_change;
160 core->vm_regs.rdi += rdi_change;
166 } while (--rep_num > 0);
169 core->rip += exit_info->instr_len;
176 int v3_handle_vmx_io_out(struct guest_info * core, struct vmx_exit_info * exit_info) {
177 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);
178 struct v3_io_hook * hook = NULL;
181 hook = v3_get_io_hook(core->vm_info, io_qual.port);
184 write_size = io_qual.access_size + 1;
186 PrintDebug("OUT of %d bytes on port %d (0x%x)\n", write_size, io_qual.port, io_qual.port);
189 PrintDebug("OUT operation on unhooked IO port 0x%x\n", io_qual.port);
191 if (hook->write(core, io_qual.port, &(core->vm_regs.rax), write_size, hook->priv_data) != write_size) {
192 PrintError("Write failure for out on port %x\n",io_qual.port);
197 core->rip += exit_info->instr_len;
204 int v3_handle_vmx_io_outs(struct guest_info * core, struct vmx_exit_info * exit_info) {
205 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);
206 struct v3_io_hook * hook = NULL;
208 addr_t guest_va = exit_info->guest_linear_addr;
212 struct rflags * flags = (struct rflags *)&(core->ctrl_regs.rflags);
214 hook = v3_get_io_hook(core->vm_info, io_qual.port);
216 PrintDebug("OUTS on port 0x%x\n", io_qual.port);
218 write_size = io_qual.access_size + 1;
221 // Grab the address sized bits of rcx
222 struct vmx_exit_io_instr_info instr_info = *(struct vmx_exit_io_instr_info *)&(exit_info->instr_info);
224 if (instr_info.addr_size == 0) {
225 rep_num = core->vm_regs.rcx & 0xffff;
226 } else if(instr_info.addr_size == 1) {
227 rep_num = core->vm_regs.rcx & 0xffffffff;
228 } else if(instr_info.addr_size == 2) {
229 rep_num = core->vm_regs.rcx & 0xffffffffffffffffLL;
231 PrintDebug("Unknown INS address size!\n");
237 rsi_change = -write_size;
239 rsi_change = write_size;
244 PrintDebug("OUTS size=%d for %ld steps\n", write_size, rep_num);
246 if (v3_gva_to_hva(core, guest_va, &host_addr) == -1) {
247 PrintError("Could not convert guest VA to host VA\n");
254 PrintDebug("OUTS operation on unhooked IO port 0x%x\n", io_qual.port);
256 if (hook->write(core, io_qual.port, (char *)host_addr, write_size, hook->priv_data) != write_size) {
257 PrintError("Read failure for INS on port 0x%x\n", io_qual.port);
263 host_addr += rsi_change;
264 core->vm_regs.rsi += rsi_change;
270 } while (--rep_num > 0);
273 core->rip += exit_info->instr_len;