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".
21 #include <palacios/vmm_msr.h>
22 #include <palacios/vmm.h>
23 #include <palacios/vm_guest.h>
26 void v3_init_msr_map(struct v3_vm_info * vm) {
27 struct v3_msr_map * msr_map = &(vm->msr_map);
29 PrintDebug("Initializing MSR map.\n");
31 INIT_LIST_HEAD(&(msr_map->hook_list));
32 msr_map->num_hooks = 0;
34 msr_map->arch_data = NULL;
35 msr_map->update_map = NULL;
38 int v3_handle_msr_write(struct guest_info * info) {
39 uint_t msr_num = info->vm_regs.rcx;
40 struct v3_msr msr_val;
41 struct v3_msr_hook * hook = NULL;
43 PrintDebug("MSR write for msr 0x%x\n", msr_num);
45 hook = v3_get_msr_hook(info->vm_info, msr_num);
48 PrintError("Hook for MSR write %d not found\n", msr_num);
53 msr_val.lo = info->vm_regs.rax;
54 msr_val.hi = info->vm_regs.rdx;
56 if (hook->write(info, msr_num, msr_val, hook->priv_data) == -1) {
57 PrintError("Error in MSR hook Write\n");
67 int v3_handle_msr_read(struct guest_info * info) {
68 uint_t msr_num = info->vm_regs.rcx;
69 struct v3_msr msr_val;
70 struct v3_msr_hook * hook = NULL;
72 hook = v3_get_msr_hook(info->vm_info, msr_num);
75 PrintError("Hook for MSR read %d not found\n", msr_num);
81 if (hook->read(info, msr_num, &msr_val, hook->priv_data) == -1) {
82 PrintError("Error in MSR hook Read\n");
86 info->vm_regs.rax = msr_val.lo;
87 info->vm_regs.rdx = msr_val.hi;
93 int v3_hook_msr(struct v3_vm_info * vm, uint_t msr,
94 int (*read)(struct guest_info * core, uint_t msr, struct v3_msr * dst, void * priv_data),
95 int (*write)(struct guest_info * core, uint_t msr, struct v3_msr src, void * priv_data),
98 struct v3_msr_map * msr_map = &(vm->msr_map);
99 struct v3_msr_hook * hook = NULL;
101 hook = (struct v3_msr_hook *)V3_Malloc(sizeof(struct v3_msr_hook));
104 PrintError("Could not allocate msr hook for MSR %d\n", msr);
111 hook->priv_data = priv_data;
113 msr_map->num_hooks++;
115 list_add(&(hook->link), &(msr_map->hook_list));
117 if (msr_map->update_map) {
118 msr_map->update_map(vm, msr,
119 (read == NULL) ? 0 : 1,
120 (write == NULL) ? 0 : 1);
127 int v3_unhook_msr(struct v3_vm_info * vm, uint_t msr) {
128 PrintError("Unhooking MSRs currently not supported\n");
134 struct v3_msr_hook * v3_get_msr_hook(struct v3_vm_info * vm, uint_t msr) {
135 struct v3_msr_map * msr_map = &(vm->msr_map);
136 struct v3_msr_hook * hook = NULL;
138 list_for_each_entry(hook, &(msr_map->hook_list), link) {
139 if (hook->msr == msr) {
148 void v3_refresh_msr_map(struct v3_vm_info * vm) {
149 struct v3_msr_map * msr_map = &(vm->msr_map);
150 struct v3_msr_hook * hook = NULL;
152 if (msr_map->update_map == NULL) {
153 PrintError("Trying to refresh an MSR map with no backend\n");
157 list_for_each_entry(hook, &(msr_map->hook_list), link) {
158 PrintDebug("updating MSR map for msr %d\n", hook->msr);
159 msr_map->update_map(vm, hook->msr,
160 (hook->read == NULL) ? 0 : 1,
161 (hook->write == NULL) ? 0 : 1);
165 void v3_print_msr_map(struct v3_vm_info * vm) {
166 struct v3_msr_map * msr_map = &(vm->msr_map);
167 struct v3_msr_hook * hook = NULL;
169 list_for_each_entry(hook, &(msr_map->hook_list), link) {
170 V3_Print("MSR HOOK (MSR=0x%x) (read=0x%p) (write=0x%p)\n",
171 hook->msr, hook->read, hook->write);