* Authors:
*
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
*
*/
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+
+#include "qemu-common.h"
#include "cpu.h"
-#include "cpu-all.h"
-#include "memory_mapping.h"
+#include "sysemu/memory_mapping.h"
+#include "exec/memory.h"
+#include "exec/address-spaces.h"
+
+//#define DEBUG_GUEST_PHYS_REGION_ADD
static void memory_mapping_list_add_mapping_sorted(MemoryMappingList *list,
MemoryMapping *mapping)
}
static void create_new_memory_mapping(MemoryMappingList *list,
- target_phys_addr_t phys_addr,
- target_phys_addr_t virt_addr,
+ hwaddr phys_addr,
+ hwaddr virt_addr,
ram_addr_t length)
{
MemoryMapping *memory_mapping;
}
static inline bool mapping_contiguous(MemoryMapping *map,
- target_phys_addr_t phys_addr,
- target_phys_addr_t virt_addr)
+ hwaddr phys_addr,
+ hwaddr virt_addr)
{
return phys_addr == map->phys_addr + map->length &&
virt_addr == map->virt_addr + map->length;
* [phys_addr, phys_addr + length) have intersection?
*/
static inline bool mapping_have_same_region(MemoryMapping *map,
- target_phys_addr_t phys_addr,
+ hwaddr phys_addr,
ram_addr_t length)
{
return !(phys_addr + length < map->phys_addr ||
* intersection are the same?
*/
static inline bool mapping_conflict(MemoryMapping *map,
- target_phys_addr_t phys_addr,
- target_phys_addr_t virt_addr)
+ hwaddr phys_addr,
+ hwaddr virt_addr)
{
return virt_addr - map->virt_addr != phys_addr - map->phys_addr;
}
* in the intersection are the same.
*/
static inline void mapping_merge(MemoryMapping *map,
- target_phys_addr_t virt_addr,
+ hwaddr virt_addr,
ram_addr_t length)
{
if (virt_addr < map->virt_addr) {
}
void memory_mapping_list_add_merge_sorted(MemoryMappingList *list,
- target_phys_addr_t phys_addr,
- target_phys_addr_t virt_addr,
+ hwaddr phys_addr,
+ hwaddr virt_addr,
ram_addr_t length)
{
MemoryMapping *memory_mapping, *last_mapping;
QTAILQ_INIT(&list->head);
}
-static CPUArchState *find_paging_enabled_cpu(CPUArchState *start_cpu)
+void guest_phys_blocks_free(GuestPhysBlockList *list)
+{
+ GuestPhysBlock *p, *q;
+
+ QTAILQ_FOREACH_SAFE(p, &list->head, next, q) {
+ QTAILQ_REMOVE(&list->head, p, next);
+ memory_region_unref(p->mr);
+ g_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;
+
+static void guest_phys_blocks_region_add(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ GuestPhysListener *g;
+ uint64_t section_size;
+ hwaddr target_start, target_end;
+ uint8_t *host_addr;
+ GuestPhysBlock *predecessor;
+
+ /* we only care about RAM */
+ if (!memory_region_is_ram(section->mr) ||
+ memory_region_is_ram_device(section->mr) ||
+ memory_region_is_nonvolatile(section->mr)) {
+ return;
+ }
+
+ g = container_of(listener, GuestPhysListener, listener);
+ section_size = int128_get64(section->size);
+ target_start = section->offset_within_address_space;
+ target_end = target_start + section_size;
+ host_addr = memory_region_get_ram_ptr(section->mr) +
+ section->offset_within_region;
+ predecessor = NULL;
+
+ /* find continuity in guest physical address space */
+ if (!QTAILQ_EMPTY(&g->list->head)) {
+ hwaddr predecessor_size;
+
+ predecessor = QTAILQ_LAST(&g->list->head);
+ predecessor_size = predecessor->target_end - predecessor->target_start;
+
+ /* the memory API guarantees monotonically increasing traversal */
+ g_assert(predecessor->target_end <= target_start);
+
+ /* we want continuity in both guest-physical and host-virtual memory */
+ if (predecessor->target_end < target_start ||
+ predecessor->host_addr + predecessor_size != host_addr) {
+ predecessor = NULL;
+ }
+ }
+
+ if (predecessor == NULL) {
+ /* isolated mapping, allocate it and add it to the list */
+ GuestPhysBlock *block = g_malloc0(sizeof *block);
+
+ block->target_start = target_start;
+ block->target_end = target_end;
+ block->host_addr = host_addr;
+ block->mr = section->mr;
+ memory_region_ref(section->mr);
+
+ QTAILQ_INSERT_TAIL(&g->list->head, block, next);
+ ++g->list->num;
+ } else {
+ /* expand predecessor until @target_end; predecessor's start doesn't
+ * change
+ */
+ predecessor->target_end = target_end;
+ }
+
+#ifdef DEBUG_GUEST_PHYS_REGION_ADD
+ fprintf(stderr, "%s: target_start=" TARGET_FMT_plx " target_end="
+ TARGET_FMT_plx ": %s (count: %u)\n", __func__, target_start,
+ target_end, predecessor ? "joined" : "added", g->list->num);
+#endif
+}
+
+void guest_phys_blocks_append(GuestPhysBlockList *list)
{
- CPUArchState *env;
+ GuestPhysListener g = { 0 };
+
+ g.list = list;
+ g.listener.region_add = &guest_phys_blocks_region_add;
+ memory_listener_register(&g.listener, &address_space_memory);
+ memory_listener_unregister(&g.listener);
+}
- for (env = start_cpu; env != NULL; env = env->next_cpu) {
- if (cpu_paging_enabled(env)) {
- return env;
+static CPUState *find_paging_enabled_cpu(CPUState *start_cpu)
+{
+ CPUState *cpu;
+
+ CPU_FOREACH(cpu) {
+ if (cpu_paging_enabled(cpu)) {
+ return cpu;
}
}
return NULL;
}
-int qemu_get_guest_memory_mapping(MemoryMappingList *list)
+void qemu_get_guest_memory_mapping(MemoryMappingList *list,
+ const GuestPhysBlockList *guest_phys_blocks,
+ Error **errp)
{
- CPUArchState *env, *first_paging_enabled_cpu;
- RAMBlock *block;
+ CPUState *cpu, *first_paging_enabled_cpu;
+ GuestPhysBlock *block;
ram_addr_t offset, length;
- int ret;
first_paging_enabled_cpu = find_paging_enabled_cpu(first_cpu);
if (first_paging_enabled_cpu) {
- for (env = first_paging_enabled_cpu; env != NULL; env = env->next_cpu) {
- ret = cpu_get_memory_mapping(list, env);
- if (ret < 0) {
- return -1;
+ for (cpu = first_paging_enabled_cpu; cpu != NULL;
+ cpu = CPU_NEXT(cpu)) {
+ Error *err = NULL;
+ cpu_get_memory_mapping(cpu, list, &err);
+ if (err) {
+ error_propagate(errp, err);
+ return;
}
}
- return 0;
+ return;
}
/*
* If the guest doesn't use paging, the virtual address is equal to physical
* address.
*/
- QLIST_FOREACH(block, &ram_list.blocks, next) {
- offset = block->offset;
- length = block->length;
+ 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);
}
-
- return 0;
}
-void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list)
+void qemu_get_guest_simple_memory_mapping(MemoryMappingList *list,
+ const GuestPhysBlockList *guest_phys_blocks)
{
- RAMBlock *block;
+ GuestPhysBlock *block;
- QLIST_FOREACH(block, &ram_list.blocks, next) {
- create_new_memory_mapping(list, block->offset, 0, block->length);
+ QTAILQ_FOREACH(block, &guest_phys_blocks->head, next) {
+ create_new_memory_mapping(list, block->target_start, 0,
+ block->target_end - block->target_start);
}
}
if (cur->phys_addr >= begin + length ||
cur->phys_addr + cur->length <= begin) {
QTAILQ_REMOVE(&list->head, cur, next);
+ g_free(cur);
list->num--;
continue;
}
projects / qemu.git / blobdiff