unicorn/qemu/memory_mapping.c

267 lines
7.6 KiB
C

/*
* QEMU memory mapping
*
* Copyright Fujitsu, Corp. 2011, 2012
*
* Authors:
* Wen Congyang <wency@cn.fujitsu.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
/* Modified for Unicorn Engine by Nguyen Anh Quynh, 2015 */
#include "glib_compat.h"
#include "cpu.h"
#include "exec/cpu-all.h"
#include "sysemu/memory_mapping.h"
#include "exec/memory.h"
#include "exec/address-spaces.h"
#include "uc_priv.h"
//#define DEBUG_GUEST_PHYS_REGION_ADD
static void memory_mapping_list_add_mapping_sorted(MemoryMappingList *list,
MemoryMapping *mapping)
{
MemoryMapping *p;
QTAILQ_FOREACH(p, &list->head, next) {
if (p->phys_addr >= mapping->phys_addr) {
QTAILQ_INSERT_BEFORE(p, mapping, next);
return;
}
}
QTAILQ_INSERT_TAIL(&list->head, mapping, next);
}
static void create_new_memory_mapping(MemoryMappingList *list,
hwaddr phys_addr,
hwaddr virt_addr,
ram_addr_t length)
{
MemoryMapping *memory_mapping;
memory_mapping = g_malloc(sizeof(MemoryMapping));
memory_mapping->phys_addr = phys_addr;
memory_mapping->virt_addr = virt_addr;
memory_mapping->length = length;
list->last_mapping = memory_mapping;
list->num++;
memory_mapping_list_add_mapping_sorted(list, memory_mapping);
}
static inline bool mapping_contiguous(MemoryMapping *map,
hwaddr phys_addr,
hwaddr virt_addr)
{
return phys_addr == map->phys_addr + map->length &&
virt_addr == map->virt_addr + map->length;
}
/*
* [map->phys_addr, map->phys_addr + map->length) and
* [phys_addr, phys_addr + length) have intersection?
*/
static inline bool mapping_have_same_region(MemoryMapping *map,
hwaddr phys_addr,
ram_addr_t length)
{
return !(phys_addr + length < map->phys_addr ||
phys_addr >= map->phys_addr + map->length);
}
/*
* [map->phys_addr, map->phys_addr + map->length) and
* [phys_addr, phys_addr + length) have intersection. The virtual address in the
* intersection are the same?
*/
static inline bool mapping_conflict(MemoryMapping *map,
hwaddr phys_addr,
hwaddr virt_addr)
{
return virt_addr - map->virt_addr != phys_addr - map->phys_addr;
}
/*
* [map->virt_addr, map->virt_addr + map->length) and
* [virt_addr, virt_addr + length) have intersection. And the physical address
* in the intersection are the same.
*/
static inline void mapping_merge(MemoryMapping *map,
hwaddr virt_addr,
ram_addr_t length)
{
if (virt_addr < map->virt_addr) {
map->length += map->virt_addr - virt_addr;
map->virt_addr = virt_addr;
}
if ((virt_addr + length) >
(map->virt_addr + map->length)) {
map->length = virt_addr + length - map->virt_addr;
}
}
void memory_mapping_list_add_merge_sorted(MemoryMappingList *list,
hwaddr phys_addr,
hwaddr virt_addr,
ram_addr_t length)
{
MemoryMapping *memory_mapping, *last_mapping;
if (QTAILQ_EMPTY(&list->head)) {
create_new_memory_mapping(list, phys_addr, virt_addr, length);
return;
}
last_mapping = list->last_mapping;
if (last_mapping) {
if (mapping_contiguous(last_mapping, phys_addr, virt_addr)) {
last_mapping->length += length;
return;
}
}
QTAILQ_FOREACH(memory_mapping, &list->head, next) {
if (mapping_contiguous(memory_mapping, phys_addr, virt_addr)) {
memory_mapping->length += length;
list->last_mapping = memory_mapping;
return;
}
if (phys_addr + length < memory_mapping->phys_addr) {
/* create a new region before memory_mapping */
break;
}
if (mapping_have_same_region(memory_mapping, phys_addr, length)) {
if (mapping_conflict(memory_mapping, phys_addr, virt_addr)) {
continue;
}
/* merge this region into memory_mapping */
mapping_merge(memory_mapping, virt_addr, length);
list->last_mapping = memory_mapping;
return;
}
}
/* this region can not be merged into any existed memory mapping. */
create_new_memory_mapping(list, phys_addr, virt_addr, length);
}
void memory_mapping_list_free(MemoryMappingList *list)
{
MemoryMapping *p, *q;
QTAILQ_FOREACH_SAFE(p, &list->head, next, q) {
QTAILQ_REMOVE(&list->head, p, next);
free(p);
}
list->num = 0;
list->last_mapping = NULL;
}
void memory_mapping_list_init(MemoryMappingList *list)
{
list->num = 0;
list->last_mapping = NULL;
QTAILQ_INIT(&list->head);
}
void guest_phys_blocks_free(GuestPhysBlockList *list)
{
GuestPhysBlock *p, *q;
QTAILQ_FOREACH_SAFE(p, &list->head, next, q) {
QTAILQ_REMOVE(&list->head, p, next);
free(p);
}
list->num = 0;
}
void guest_phys_blocks_init(GuestPhysBlockList *list)
{
list->num = 0;
QTAILQ_INIT(&list->head);
}
typedef struct GuestPhysListener {
GuestPhysBlockList *list;
MemoryListener listener;
} GuestPhysListener;
void qemu_get_guest_memory_mapping(struct uc_struct *uc,
MemoryMappingList *list,
const GuestPhysBlockList *guest_phys_blocks,
Error **errp)
{
CPUState *cpu = uc->cpu;
GuestPhysBlock *block;
ram_addr_t offset, length;
if (cpu_paging_enabled(cpu)) {
Error *err = NULL;
cpu_get_memory_mapping(cpu, list, &err);
if (err) {
error_propagate(errp, err);
return;
}
return;
}
/*
* If the guest doesn't use paging, the virtual address is equal to physical
* address.
*/
QTAILQ_FOREACH(block, &guest_phys_blocks->head, next) {
offset = block->target_start;
length = block->target_end - block->target_start;
create_new_memory_mapping(list, offset, offset, length);
}
}
void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list,
const GuestPhysBlockList *guest_phys_blocks)
{
GuestPhysBlock *block;
QTAILQ_FOREACH(block, &guest_phys_blocks->head, next) {
create_new_memory_mapping(list, block->target_start, 0,
block->target_end - block->target_start);
}
}
void memory_mapping_filter(MemoryMappingList *list, int64_t begin,
int64_t length)
{
MemoryMapping *cur, *next;
QTAILQ_FOREACH_SAFE(cur, &list->head, next, next) {
if (cur->phys_addr >= begin + length ||
cur->phys_addr + cur->length <= begin) {
QTAILQ_REMOVE(&list->head, cur, next);
list->num--;
continue;
}
if (cur->phys_addr < begin) {
cur->length -= begin - cur->phys_addr;
if (cur->virt_addr) {
cur->virt_addr += begin - cur->phys_addr;
}
cur->phys_addr = begin;
}
if (cur->phys_addr + cur->length > begin + length) {
cur->length -= cur->phys_addr + cur->length - begin - length;
}
}
}