--- /dev/null
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+
+
+
+#include <palacios/svm_io.h>
+#include <palacios/vmm_io.h>
+#include <palacios/vmm_ctrl_regs.h>
+#include <palacios/vmm_decoder.h>
+#include <palacios/vm_guest_mem.h>
+
+#ifndef DEBUG_IO
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
+
+
+
+
+// This should package up an IO request and call vmm_handle_io
+int v3_handle_svm_io_in(struct guest_info * info) {
+ vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
+ // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
+ struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
+
+ struct vmm_io_hook * hook = v3_get_io_hook(&(info->io_map), io_info->port);
+ int read_size = 0;
+
+ if (hook == NULL) {
+ PrintError("Hook Not present for in on port %x\n", io_info->port);
+ // error, we should not have exited on this port
+ return -1;
+ }
+
+
+ if (io_info->sz8) {
+ read_size = 1;
+ } else if (io_info->sz16) {
+ read_size = 2;
+ } else if (io_info->sz32) {
+ read_size = 4;
+ }
+
+ PrintDebug("IN of %d bytes on port %d (0x%x)\n", read_size, io_info->port, io_info->port);
+
+ if (hook->read(io_info->port, &(info->vm_regs.rax), read_size, hook->priv_data) != read_size) {
+ // not sure how we handle errors.....
+ PrintError("Read Failure for in on port %x\n", io_info->port);
+ return -1;
+ }
+
+ info->rip = ctrl_area->exit_info2;
+
+ return 0;
+}
+
+
+
+
+
+/* We might not handle wrap around of the RDI register correctly...
+ * In that if we do wrap around the effect will manifest in the higher bits of the register
+ */
+int v3_handle_svm_io_ins(struct guest_info * info) {
+ vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
+ vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
+
+ struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
+
+ struct vmm_io_hook * hook = v3_get_io_hook(&(info->io_map), io_info->port);
+ int read_size = 0;
+
+ addr_t dst_addr = 0;
+ uint_t rep_num = 1;
+ ullong_t mask = 0;
+
+
+
+ // This is kind of hacky...
+ // direction can equal either 1 or -1
+ // We will multiply the final added offset by this value to go the correct direction
+ int direction = 1;
+ struct rflags * flags = (struct rflags *)&(guest_state->rflags);
+ if (flags->df) {
+ direction = -1;
+ }
+
+
+ if (hook == NULL) {
+ PrintError("Hook Not present for ins on port %x\n", io_info->port);
+ // error, we should not have exited on this port
+ return -1;
+ }
+
+ struct v3_segment *theseg = &(info->segments.es); // default is ES
+
+ addr_t inst_ptr;
+
+ if (guest_va_to_host_va(info, get_addr_linear(info, info->rip, &(info->segments.cs)), &inst_ptr) == -1) {
+ PrintError("Can't access instruction\n");
+ return -1;
+ }
+
+ while (is_prefix_byte(*((char*)inst_ptr))) {
+ switch (*((char*)inst_ptr)) {
+ case PREFIX_CS_OVERRIDE:
+ theseg = &(info->segments.cs);
+ break;
+ case PREFIX_SS_OVERRIDE:
+ theseg = &(info->segments.ss);
+ break;
+ case PREFIX_DS_OVERRIDE:
+ theseg = &(info->segments.ds);
+ break;
+ case PREFIX_ES_OVERRIDE:
+ theseg = &(info->segments.es);
+ break;
+ case PREFIX_FS_OVERRIDE:
+ theseg = &(info->segments.fs);
+ break;
+ case PREFIX_GS_OVERRIDE:
+ theseg = &(info->segments.gs);
+ break;
+ default:
+ break;
+ }
+ inst_ptr++;
+ }
+
+
+ PrintDebug("INS on port %d (0x%x)\n", io_info->port, io_info->port);
+
+ if (io_info->sz8) {
+ read_size = 1;
+ } else if (io_info->sz16) {
+ read_size = 2;
+ } else if (io_info->sz32) {
+ read_size = 4;
+ } else {
+ PrintError("io_info Invalid Size\n");
+ return -1;
+ }
+
+
+ if (io_info->addr16) {
+ mask = 0xffff;
+ } else if (io_info->addr32) {
+ mask = 0xffffffff;
+ } else if (io_info->addr64) {
+ mask = 0xffffffffffffffffLL;
+ } else {
+ // This value should be set depending on the host register size...
+ mask = get_gpr_mask(info);
+
+ PrintDebug("INS io_info invalid address size, mask=0x%p, io_info=0x%p\n",
+ (void *)mask, (void *)(io_info));
+ // PrintDebug("INS Aborted... Check implementation\n");
+ //return -1;
+ }
+
+ if (io_info->rep) {
+ // rep_num = info->vm_regs.rcx & mask;
+ rep_num = info->vm_regs.rcx;
+ }
+
+
+ PrintDebug("INS size=%d for %d steps\n", read_size, rep_num);
+
+ while (rep_num > 0) {
+ addr_t host_addr;
+ dst_addr = get_addr_linear(info, info->vm_regs.rdi & mask, theseg);
+
+ PrintDebug("Writing 0x%p\n", (void *)dst_addr);
+
+ if (guest_va_to_host_va(info, dst_addr, &host_addr) == -1) {
+ // either page fault or gpf...
+ PrintError("Could not convert Guest VA to host VA\n");
+ return -1;
+ }
+
+ if (hook->read(io_info->port, (char*)host_addr, read_size, hook->priv_data) != read_size) {
+ // not sure how we handle errors.....
+ PrintError("Read Failure for ins on port %x\n", io_info->port);
+ return -1;
+ }
+
+ info->vm_regs.rdi += read_size * direction;
+
+ if (io_info->rep)
+ info->vm_regs.rcx--;
+
+ rep_num--;
+ }
+
+
+ info->rip = ctrl_area->exit_info2;
+
+ return 0;
+}
+
+int v3_handle_svm_io_out(struct guest_info * info) {
+ vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
+ // vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
+ struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
+
+ struct vmm_io_hook * hook = v3_get_io_hook(&(info->io_map), io_info->port);
+ int write_size = 0;
+
+ if (hook == NULL) {
+ PrintError("Hook Not present for out on port %x\n", io_info->port);
+ // error, we should not have exited on this port
+ return -1;
+ }
+
+
+ if (io_info->sz8) {
+ write_size = 1;
+ } else if (io_info->sz16) {
+ write_size = 2;
+ } else if (io_info->sz32) {
+ write_size = 4;
+ }
+
+ PrintDebug("OUT of %d bytes on port %d (0x%x)\n", write_size, io_info->port, io_info->port);
+
+ if (hook->write(io_info->port, &(info->vm_regs.rax), write_size, hook->priv_data) != write_size) {
+ // not sure how we handle errors.....
+ PrintError("Write Failure for out on port %x\n", io_info->port);
+ return -1;
+ }
+
+ info->rip = ctrl_area->exit_info2;
+
+ return 0;
+}
+
+
+/* We might not handle wrap around of the RSI register correctly...
+ * In that if we do wrap around the effect will manifest in the higher bits of the register
+ */
+
+int v3_handle_svm_io_outs(struct guest_info * info) {
+ vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t *)(info->vmm_data));
+ vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
+
+
+ struct svm_io_info * io_info = (struct svm_io_info *)&(ctrl_area->exit_info1);
+
+ struct vmm_io_hook * hook = v3_get_io_hook(&(info->io_map), io_info->port);
+ int write_size = 0;
+
+ addr_t dst_addr = 0;
+ uint_t rep_num = 1;
+ ullong_t mask = 0;
+
+
+
+ // This is kind of hacky...
+ // direction can equal either 1 or -1
+ // We will multiply the final added offset by this value to go the correct direction
+ int direction = 1;
+ struct rflags * flags = (struct rflags *)&(guest_state->rflags);
+ if (flags->df) {
+ direction = -1;
+ }
+
+
+ if (hook == NULL) {
+ PrintError("Hook Not present for outs on port %x\n", io_info->port);
+ // error, we should not have exited on this port
+ return -1;
+ }
+
+ PrintDebug("OUTS on port %d (0x%x)\n", io_info->port, io_info->port);
+
+ if (io_info->sz8) {
+ write_size = 1;
+ } else if (io_info->sz16) {
+ write_size = 2;
+ } else if (io_info->sz32) {
+ write_size = 4;
+ }
+
+
+ if (io_info->addr16) {
+ mask = 0xffff;
+ } else if (io_info->addr32) {
+ mask = 0xffffffff;
+ } else if (io_info->addr64) {
+ mask = 0xffffffffffffffffLL;
+ } else {
+ // This value should be set depending on the host register size...
+ mask = get_gpr_mask(info);
+
+ PrintDebug("OUTS io_info invalid address size, mask=0%p, io_info=0x%p\n",
+ (void *)mask, (void *)io_info);
+ // PrintDebug("INS Aborted... Check implementation\n");
+ //return -1;
+ // should never happen
+ //PrintDebug("Invalid Address length\n");
+ //return -1;
+ }
+
+ if (io_info->rep) {
+ rep_num = info->vm_regs.rcx & mask;
+ }
+
+ struct v3_segment *theseg = &(info->segments.es); // default is ES
+
+ addr_t inst_ptr;
+
+ if (guest_va_to_host_va(info,get_addr_linear(info,info->rip,&(info->segments.cs)),&inst_ptr)==-1) {
+ PrintError("Can't access instruction\n");
+ return -1;
+ }
+
+ while (is_prefix_byte(*((char*)inst_ptr))) {
+ switch (*((char*)inst_ptr)) {
+ case PREFIX_CS_OVERRIDE:
+ theseg = &(info->segments.cs);
+ break;
+ case PREFIX_SS_OVERRIDE:
+ theseg = &(info->segments.ss);
+ break;
+ case PREFIX_DS_OVERRIDE:
+ theseg = &(info->segments.ds);
+ break;
+ case PREFIX_ES_OVERRIDE:
+ theseg = &(info->segments.es);
+ break;
+ case PREFIX_FS_OVERRIDE:
+ theseg = &(info->segments.fs);
+ break;
+ case PREFIX_GS_OVERRIDE:
+ theseg = &(info->segments.gs);
+ break;
+ default:
+ break;
+ }
+ inst_ptr++;
+ }
+
+ PrintDebug("OUTS size=%d for %d steps\n", write_size, rep_num);
+
+ while (rep_num > 0) {
+ addr_t host_addr;
+
+
+
+ dst_addr = get_addr_linear(info, (info->vm_regs.rsi & mask), theseg);
+
+ if (guest_va_to_host_va(info, dst_addr, &host_addr) == -1) {
+ // either page fault or gpf...
+ }
+
+ if (hook->write(io_info->port, (char*)host_addr, write_size, hook->priv_data) != write_size) {
+ // not sure how we handle errors.....
+ PrintError("Write Failure for outs on port %x\n", io_info->port);
+ return -1;
+ }
+
+ info->vm_regs.rsi += write_size * direction;
+
+ if (io_info->rep)
+ info->vm_regs.rcx--;
+
+ rep_num--;
+ }
+
+
+ info->rip = ctrl_area->exit_info2;
+
+
+ return 0;
+}
