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, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
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/svm_io.h>
21 #include <palacios/vmm_io.h>
22 #include <palacios/vmm_ctrl_regs.h>
23 #include <palacios/vmm_decoder.h>
24 #include <palacios/vm_guest_mem.h>
28 #define PrintDebug(fmt, args...)
35 // This should package up an IO request and call vmm_handle_io
36 int v3_handle_svm_io_in(struct guest_info * info) {
37 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
38 // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
39 struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
41 struct v3_io_hook * hook = v3_get_io_hook(info, io_info->port);
45 PrintError("Hook Not present for in on port %x\n", io_info->port);
46 // error, we should not have exited on this port
53 } else if (io_info->sz16) {
55 } else if (io_info->sz32) {
59 PrintDebug("IN of %d bytes on port %d (0x%x)\n", read_size, io_info->port, io_info->port);
61 if (hook->read(io_info->port, &(info->vm_regs.rax), read_size, hook->priv_data) != read_size) {
62 // not sure how we handle errors.....
63 PrintError("Read Failure for in on port %x\n", io_info->port);
67 info->rip = ctrl_area->exit_info2;
76 /* We might not handle wrap around of the RDI register correctly...
77 * In that if we do wrap around the effect will manifest in the higher bits of the register
79 int v3_handle_svm_io_ins(struct guest_info * info) {
80 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
81 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
83 struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
85 struct v3_io_hook * hook = v3_get_io_hook(info, io_info->port);
94 // This is kind of hacky...
95 // direction can equal either 1 or -1
96 // We will multiply the final added offset by this value to go the correct direction
98 struct rflags * flags = (struct rflags *)&(guest_state->rflags);
105 PrintError("Hook Not present for ins on port %x\n", io_info->port);
106 // error, we should not have exited on this port
110 struct v3_segment *theseg = &(info->segments.es); // default is ES
114 if (guest_va_to_host_va(info, get_addr_linear(info, info->rip, &(info->segments.cs)), &inst_ptr) == -1) {
115 PrintError("Can't access instruction\n");
119 while (is_prefix_byte(*((char*)inst_ptr))) {
120 switch (*((char*)inst_ptr)) {
121 case PREFIX_CS_OVERRIDE:
122 theseg = &(info->segments.cs);
124 case PREFIX_SS_OVERRIDE:
125 theseg = &(info->segments.ss);
127 case PREFIX_DS_OVERRIDE:
128 theseg = &(info->segments.ds);
130 case PREFIX_ES_OVERRIDE:
131 theseg = &(info->segments.es);
133 case PREFIX_FS_OVERRIDE:
134 theseg = &(info->segments.fs);
136 case PREFIX_GS_OVERRIDE:
137 theseg = &(info->segments.gs);
146 PrintDebug("INS on port %d (0x%x)\n", io_info->port, io_info->port);
150 } else if (io_info->sz16) {
152 } else if (io_info->sz32) {
155 PrintError("io_info Invalid Size\n");
160 if (io_info->addr16) {
162 } else if (io_info->addr32) {
164 } else if (io_info->addr64) {
165 mask = 0xffffffffffffffffLL;
167 // This value should be set depending on the host register size...
168 mask = get_gpr_mask(info);
170 PrintDebug("INS io_info invalid address size, mask=0x%p, io_info=0x%p\n",
171 (void *)(addr_t)mask, (void *)(addr_t)(io_info));
172 // PrintDebug("INS Aborted... Check implementation\n");
177 // rep_num = info->vm_regs.rcx & mask;
178 rep_num = info->vm_regs.rcx;
182 PrintDebug("INS size=%d for %d steps\n", read_size, rep_num);
184 while (rep_num > 0) {
186 dst_addr = get_addr_linear(info, info->vm_regs.rdi & mask, theseg);
188 PrintDebug("Writing 0x%p\n", (void *)dst_addr);
190 if (guest_va_to_host_va(info, dst_addr, &host_addr) == -1) {
191 // either page fault or gpf...
192 PrintError("Could not convert Guest VA to host VA\n");
196 if (hook->read(io_info->port, (char*)host_addr, read_size, hook->priv_data) != read_size) {
197 // not sure how we handle errors.....
198 PrintError("Read Failure for ins on port %x\n", io_info->port);
202 info->vm_regs.rdi += read_size * direction;
211 info->rip = ctrl_area->exit_info2;
216 int v3_handle_svm_io_out(struct guest_info * info) {
217 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
218 // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
219 struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
221 struct v3_io_hook * hook = v3_get_io_hook(info, io_info->port);
225 PrintError("Hook Not present for out on port %x\n", io_info->port);
226 // error, we should not have exited on this port
233 } else if (io_info->sz16) {
235 } else if (io_info->sz32) {
239 PrintDebug("OUT of %d bytes on port %d (0x%x)\n", write_size, io_info->port, io_info->port);
241 if (hook->write(io_info->port, &(info->vm_regs.rax), write_size, hook->priv_data) != write_size) {
242 // not sure how we handle errors.....
243 PrintError("Write Failure for out on port %x\n", io_info->port);
247 info->rip = ctrl_area->exit_info2;
253 /* We might not handle wrap around of the RSI register correctly...
254 * In that if we do wrap around the effect will manifest in the higher bits of the register
257 int v3_handle_svm_io_outs(struct guest_info * info) {
258 vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
259 vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
262 struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
264 struct v3_io_hook * hook = v3_get_io_hook(info, io_info->port);
273 // This is kind of hacky...
274 // direction can equal either 1 or -1
275 // We will multiply the final added offset by this value to go the correct direction
277 struct rflags * flags = (struct rflags *)&(guest_state->rflags);
284 PrintError("Hook Not present for outs on port %x\n", io_info->port);
285 // error, we should not have exited on this port
289 PrintDebug("OUTS on port %d (0x%x)\n", io_info->port, io_info->port);
293 } else if (io_info->sz16) {
295 } else if (io_info->sz32) {
300 if (io_info->addr16) {
302 } else if (io_info->addr32) {
304 } else if (io_info->addr64) {
305 mask = 0xffffffffffffffffLL;
307 // This value should be set depending on the host register size...
308 mask = get_gpr_mask(info);
310 PrintDebug("OUTS io_info invalid address size, mask=0%p, io_info=0x%p\n",
311 (void *)(addr_t)mask, (void *)(addr_t)io_info);
312 // PrintDebug("INS Aborted... Check implementation\n");
314 // should never happen
315 //PrintDebug("Invalid Address length\n");
320 rep_num = info->vm_regs.rcx & mask;
323 struct v3_segment *theseg = &(info->segments.es); // default is ES
327 if (guest_va_to_host_va(info,get_addr_linear(info,info->rip,&(info->segments.cs)),&inst_ptr)==-1) {
328 PrintError("Can't access instruction\n");
332 while (is_prefix_byte(*((char*)inst_ptr))) {
333 switch (*((char*)inst_ptr)) {
334 case PREFIX_CS_OVERRIDE:
335 theseg = &(info->segments.cs);
337 case PREFIX_SS_OVERRIDE:
338 theseg = &(info->segments.ss);
340 case PREFIX_DS_OVERRIDE:
341 theseg = &(info->segments.ds);
343 case PREFIX_ES_OVERRIDE:
344 theseg = &(info->segments.es);
346 case PREFIX_FS_OVERRIDE:
347 theseg = &(info->segments.fs);
349 case PREFIX_GS_OVERRIDE:
350 theseg = &(info->segments.gs);
358 PrintDebug("OUTS size=%d for %d steps\n", write_size, rep_num);
360 while (rep_num > 0) {
365 dst_addr = get_addr_linear(info, (info->vm_regs.rsi & mask), theseg);
367 if (guest_va_to_host_va(info, dst_addr, &host_addr) == -1) {
368 // either page fault or gpf...
371 if (hook->write(io_info->port, (char*)host_addr, write_size, hook->priv_data) != write_size) {
372 // not sure how we handle errors.....
373 PrintError("Write Failure for outs on port %x\n", io_info->port);
377 info->vm_regs.rsi += write_size * direction;
386 info->rip = ctrl_area->exit_info2;