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) {
52 vm->io_map.update_map = update_map;
54 temp = V3_AllocPages(2); // need not be shadow-safe, not exposed to guest
56 PrintError(vm, VCORE_NONE, "Cannot allocate io bitmap\n");
60 vm->io_map.arch_data = V3_VAddr(temp);
61 memset(vm->io_map.arch_data, 0xff, PAGE_SIZE_4KB * 2);
63 v3_refresh_io_map(vm);
68 int v3_deinit_vmx_io_map(struct v3_vm_info * vm) {
69 V3_FreePages(V3_PAddr(vm->io_map.arch_data), 2);
74 int v3_handle_vmx_io_in(struct guest_info * core, struct vmx_exit_info * exit_info) {
75 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);;
76 struct v3_io_hook * hook = NULL;
79 hook = v3_get_io_hook(core->vm_info, io_qual.port);
81 read_size = io_qual.access_size + 1;
83 PrintDebug(core->vm_info, core, "IN of %d bytes on port %d (0x%x)\n", read_size, io_qual.port, io_qual.port);
86 PrintDebug(core->vm_info, core, "IN operation on unhooked IO port 0x%x - returning zeros\n", io_qual.port);
87 core->vm_regs.rax >>= 8*read_size;
88 core->vm_regs.rax <<= 8*read_size;
91 if (hook->read(core, io_qual.port, &(core->vm_regs.rax), read_size, hook->priv_data) != read_size) {
92 PrintError(core->vm_info, core, "Read failure for IN on port %x\n", io_qual.port);
98 core->rip += exit_info->instr_len;
103 int v3_handle_vmx_io_ins(struct guest_info * core, struct vmx_exit_info * exit_info) {
104 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);;
105 struct v3_io_hook * hook = NULL;
107 addr_t guest_va = exit_info->guest_linear_addr;
108 addr_t host_addr = 0;
110 uint32_t rep_num = 1;
111 struct rflags * flags = (struct rflags *)&(core->ctrl_regs.rflags);
113 hook = v3_get_io_hook(core->vm_info, io_qual.port);
116 PrintDebug(core->vm_info, core, "INS on port 0x%x\n", io_qual.port);
118 read_size = io_qual.access_size + 1;
121 struct vmx_exit_io_instr_info instr_info = *(struct vmx_exit_io_instr_info *)&(exit_info->instr_info);
123 if (instr_info.addr_size == 0) {
124 rep_num = core->vm_regs.rcx & 0xffff;
125 } else if(instr_info.addr_size == 1) {
126 rep_num = core->vm_regs.rcx & 0xffffffff;
127 } else if(instr_info.addr_size == 2) {
128 rep_num = core->vm_regs.rcx & 0xffffffffffffffffLL;
130 PrintDebug(core->vm_info, core, "Unknown INS address size!\n");
136 rdi_change = -read_size;
138 rdi_change = read_size;
141 PrintDebug(core->vm_info, core, "INS size=%d for %u steps\n", read_size, rep_num);
145 if (v3_gva_to_hva(core, guest_va, &host_addr) == -1) {
146 PrintError(core->vm_info, core, "Could not convert Guest VA to host VA\n");
153 PrintDebug(core->vm_info, core, "INS operation on unhooked IO port 0x%x - returning zeros\n", io_qual.port);
155 memset((char*)host_addr,0,read_size);
158 if (hook->read(core, io_qual.port, (char *)host_addr, read_size, hook->priv_data) != read_size) {
159 PrintError(core->vm_info, core, "Read Failure for INS on port 0x%x\n", io_qual.port);
165 host_addr += rdi_change;
166 core->vm_regs.rdi += rdi_change;
172 } while (--rep_num > 0);
175 core->rip += exit_info->instr_len;
182 int v3_handle_vmx_io_out(struct guest_info * core, struct vmx_exit_info * exit_info) {
183 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);
184 struct v3_io_hook * hook = NULL;
187 hook = v3_get_io_hook(core->vm_info, io_qual.port);
190 write_size = io_qual.access_size + 1;
192 PrintDebug(core->vm_info, core, "OUT of %d bytes on port %d (0x%x)\n", write_size, io_qual.port, io_qual.port);
195 PrintDebug(core->vm_info, core, "OUT operation on unhooked IO port 0x%x - ignored\n", io_qual.port);
197 if (hook->write(core, io_qual.port, &(core->vm_regs.rax), write_size, hook->priv_data) != write_size) {
198 PrintError(core->vm_info, core, "Write failure for out on port %x\n",io_qual.port);
203 core->rip += exit_info->instr_len;
210 int v3_handle_vmx_io_outs(struct guest_info * core, struct vmx_exit_info * exit_info) {
211 struct vmx_exit_io_qual io_qual = *(struct vmx_exit_io_qual *)&(exit_info->exit_qual);
212 struct v3_io_hook * hook = NULL;
214 addr_t guest_va = exit_info->guest_linear_addr;
217 uint32_t rep_num = 1;
218 struct rflags * flags = (struct rflags *)&(core->ctrl_regs.rflags);
220 hook = v3_get_io_hook(core->vm_info, io_qual.port);
222 PrintDebug(core->vm_info, core, "OUTS on port 0x%x\n", io_qual.port);
224 write_size = io_qual.access_size + 1;
227 // Grab the address sized bits of rcx
228 struct vmx_exit_io_instr_info instr_info = *(struct vmx_exit_io_instr_info *)&(exit_info->instr_info);
230 if (instr_info.addr_size == 0) {
231 rep_num = core->vm_regs.rcx & 0xffff;
232 } else if(instr_info.addr_size == 1) {
233 rep_num = core->vm_regs.rcx & 0xffffffff;
234 } else if(instr_info.addr_size == 2) {
235 rep_num = core->vm_regs.rcx & 0xffffffffffffffffLL;
237 PrintDebug(core->vm_info, core, "Unknown INS address size!\n");
243 rsi_change = -write_size;
245 rsi_change = write_size;
250 PrintDebug(core->vm_info, core, "OUTS size=%d for %u steps\n", write_size, rep_num);
252 if (v3_gva_to_hva(core, guest_va, &host_addr) == -1) {
253 PrintError(core->vm_info, core, "Could not convert guest VA to host VA\n");
260 PrintDebug(core->vm_info, core, "OUTS operation on unhooked IO port 0x%x - ignored\n", io_qual.port);
262 if (hook->write(core, io_qual.port, (char *)host_addr, write_size, hook->priv_data) != write_size) {
263 PrintError(core->vm_info, core, "Read failure for INS on port 0x%x\n", io_qual.port);
269 host_addr += rsi_change;
270 core->vm_regs.rsi += rsi_change;
276 } while (--rep_num > 0);
279 core->rip += exit_info->instr_len;