X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=memory_mapping.c;h=87a6ed5c8e198c2055dcfbdb15adbd2330735e8f;hb=0478f37ce258438d74164dd182b0ae125f174ec6;hp=1125e3fccfc129b4ba32868f8c203d85afb44533;hpb=39cde84517ce1bcef294dc9e9e0940475c46fab2;p=qemu.git diff --git a/memory_mapping.c b/memory_mapping.c index 1125e3fcc..87a6ed5c8 100644 --- a/memory_mapping.c +++ b/memory_mapping.c @@ -6,14 +6,20 @@ * Authors: * Wen Congyang * - * 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 + #include "cpu.h" -#include "cpu-all.h" -#include "memory_mapping.h" +#include "exec/cpu-all.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) @@ -30,8 +36,8 @@ static void memory_mapping_list_add_mapping_sorted(MemoryMappingList *list, } 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; @@ -46,8 +52,8 @@ static void create_new_memory_mapping(MemoryMappingList *list, } 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; @@ -58,7 +64,7 @@ static inline bool mapping_contiguous(MemoryMapping *map, * [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 || @@ -71,8 +77,8 @@ static inline bool mapping_have_same_region(MemoryMapping *map, * 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; } @@ -83,7 +89,7 @@ static inline bool mapping_conflict(MemoryMapping *map, * 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) { @@ -98,8 +104,8 @@ static inline void mapping_merge(MemoryMapping *map, } 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; @@ -165,56 +171,155 @@ void memory_mapping_list_init(MemoryMappingList *list) 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); + 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)) { + 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, GuestPhysBlockHead); + 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; + + 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", __FUNCTION__, 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); } }