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-rw-r--r--exec.c123
1 files changed, 58 insertions, 65 deletions
diff --git a/exec.c b/exec.c
index e19ab22cd6..487583b1bd 100644
--- a/exec.c
+++ b/exec.c
@@ -59,8 +59,6 @@
//#define DEBUG_SUBPAGE
#if !defined(CONFIG_USER_ONLY)
-static bool in_migration;
-
/* ram_list is read under rcu_read_lock()/rcu_read_unlock(). Writes
* are protected by the ramlist lock.
*/
@@ -173,17 +171,22 @@ static void phys_map_node_reserve(PhysPageMap *map, unsigned nodes)
}
}
-static uint32_t phys_map_node_alloc(PhysPageMap *map)
+static uint32_t phys_map_node_alloc(PhysPageMap *map, bool leaf)
{
unsigned i;
uint32_t ret;
+ PhysPageEntry e;
+ PhysPageEntry *p;
ret = map->nodes_nb++;
+ p = map->nodes[ret];
assert(ret != PHYS_MAP_NODE_NIL);
assert(ret != map->nodes_nb_alloc);
+
+ e.skip = leaf ? 0 : 1;
+ e.ptr = leaf ? PHYS_SECTION_UNASSIGNED : PHYS_MAP_NODE_NIL;
for (i = 0; i < P_L2_SIZE; ++i) {
- map->nodes[ret][i].skip = 1;
- map->nodes[ret][i].ptr = PHYS_MAP_NODE_NIL;
+ memcpy(&p[i], &e, sizeof(e));
}
return ret;
}
@@ -193,21 +196,12 @@ static void phys_page_set_level(PhysPageMap *map, PhysPageEntry *lp,
int level)
{
PhysPageEntry *p;
- int i;
hwaddr step = (hwaddr)1 << (level * P_L2_BITS);
if (lp->skip && lp->ptr == PHYS_MAP_NODE_NIL) {
- lp->ptr = phys_map_node_alloc(map);
- p = map->nodes[lp->ptr];
- if (level == 0) {
- for (i = 0; i < P_L2_SIZE; i++) {
- p[i].skip = 0;
- p[i].ptr = PHYS_SECTION_UNASSIGNED;
- }
- }
- } else {
- p = map->nodes[lp->ptr];
+ lp->ptr = phys_map_node_alloc(map, level == 0);
}
+ p = map->nodes[lp->ptr];
lp = &p[(*index >> (level * P_L2_BITS)) & (P_L2_SIZE - 1)];
while (*nb && lp < &p[P_L2_SIZE]) {
@@ -858,21 +852,27 @@ static void tlb_reset_dirty_range_all(ram_addr_t start, ram_addr_t length)
}
/* Note: start and end must be within the same ram block. */
-void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t length,
- unsigned client)
+bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start,
+ ram_addr_t length,
+ unsigned client)
{
- if (length == 0)
- return;
- cpu_physical_memory_clear_dirty_range_type(start, length, client);
+ unsigned long end, page;
+ bool dirty;
- if (tcg_enabled()) {
+ if (length == 0) {
+ return false;
+ }
+
+ end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
+ page = start >> TARGET_PAGE_BITS;
+ dirty = bitmap_test_and_clear_atomic(ram_list.dirty_memory[client],
+ page, end - page);
+
+ if (dirty && tcg_enabled()) {
tlb_reset_dirty_range_all(start, length);
}
-}
-static void cpu_physical_memory_set_dirty_tracking(bool enable)
-{
- in_migration = enable;
+ return dirty;
}
/* Called from RCU critical section */
@@ -1362,7 +1362,8 @@ int qemu_ram_resize(ram_addr_t base, ram_addr_t newsize, Error **errp)
cpu_physical_memory_clear_dirty_range(block->offset, block->used_length);
block->used_length = newsize;
- cpu_physical_memory_set_dirty_range(block->offset, block->used_length);
+ cpu_physical_memory_set_dirty_range(block->offset, block->used_length,
+ DIRTY_CLIENTS_ALL);
memory_region_set_size(block->mr, newsize);
if (block->resized) {
block->resized(block->idstr, newsize, block->host);
@@ -1436,7 +1437,8 @@ static ram_addr_t ram_block_add(RAMBlock *new_block, Error **errp)
}
}
cpu_physical_memory_set_dirty_range(new_block->offset,
- new_block->used_length);
+ new_block->used_length,
+ DIRTY_CLIENTS_ALL);
if (new_block->host) {
qemu_ram_setup_dump(new_block->host, new_block->max_length);
@@ -1824,7 +1826,11 @@ static void notdirty_mem_write(void *opaque, hwaddr ram_addr,
default:
abort();
}
- cpu_physical_memory_set_dirty_range_nocode(ram_addr, size);
+ /* Set both VGA and migration bits for simplicity and to remove
+ * the notdirty callback faster.
+ */
+ cpu_physical_memory_set_dirty_range(ram_addr, size,
+ DIRTY_CLIENTS_NOCODE);
/* we remove the notdirty callback only if the code has been
flushed */
if (!cpu_physical_memory_is_clean(ram_addr)) {
@@ -2165,22 +2171,6 @@ static void tcg_commit(MemoryListener *listener)
}
}
-static void core_log_global_start(MemoryListener *listener)
-{
- cpu_physical_memory_set_dirty_tracking(true);
-}
-
-static void core_log_global_stop(MemoryListener *listener)
-{
- cpu_physical_memory_set_dirty_tracking(false);
-}
-
-static MemoryListener core_memory_listener = {
- .log_global_start = core_log_global_start,
- .log_global_stop = core_log_global_stop,
- .priority = 1,
-};
-
void address_space_init_dispatch(AddressSpace *as)
{
as->dispatch = NULL;
@@ -2220,8 +2210,6 @@ static void memory_map_init(void)
memory_region_init_io(system_io, NULL, &unassigned_io_ops, NULL, "io",
65536);
address_space_init(&address_space_io, system_io, "I/O");
-
- memory_listener_register(&core_memory_listener, &address_space_memory);
}
MemoryRegion *get_system_memory(void)
@@ -2279,14 +2267,23 @@ int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
#else
-static void invalidate_and_set_dirty(hwaddr addr,
+static void invalidate_and_set_dirty(MemoryRegion *mr, hwaddr addr,
hwaddr length)
{
- if (cpu_physical_memory_range_includes_clean(addr, length)) {
- tb_invalidate_phys_range(addr, addr + length, 0);
- cpu_physical_memory_set_dirty_range_nocode(addr, length);
+ uint8_t dirty_log_mask = memory_region_get_dirty_log_mask(mr);
+ /* No early return if dirty_log_mask is or becomes 0, because
+ * cpu_physical_memory_set_dirty_range will still call
+ * xen_modified_memory.
+ */
+ if (dirty_log_mask) {
+ dirty_log_mask =
+ cpu_physical_memory_range_includes_clean(addr, length, dirty_log_mask);
}
- xen_modified_memory(addr, length);
+ if (dirty_log_mask & (1 << DIRTY_MEMORY_CODE)) {
+ tb_invalidate_phys_range(addr, addr + length);
+ dirty_log_mask &= ~(1 << DIRTY_MEMORY_CODE);
+ }
+ cpu_physical_memory_set_dirty_range(addr, length, dirty_log_mask);
}
static int memory_access_size(MemoryRegion *mr, unsigned l, hwaddr addr)
@@ -2371,7 +2368,7 @@ MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
/* RAM case */
ptr = qemu_get_ram_ptr(addr1);
memcpy(ptr, buf, l);
- invalidate_and_set_dirty(addr1, l);
+ invalidate_and_set_dirty(mr, addr1, l);
}
} else {
if (!memory_access_is_direct(mr, is_write)) {
@@ -2468,7 +2465,7 @@ static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as,
switch (type) {
case WRITE_DATA:
memcpy(ptr, buf, l);
- invalidate_and_set_dirty(addr1, l);
+ invalidate_and_set_dirty(mr, addr1, l);
break;
case FLUSH_CACHE:
flush_icache_range((uintptr_t)ptr, (uintptr_t)ptr + l);
@@ -2693,7 +2690,7 @@ void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len,
mr = qemu_ram_addr_from_host(buffer, &addr1);
assert(mr != NULL);
if (is_write) {
- invalidate_and_set_dirty(addr1, access_len);
+ invalidate_and_set_dirty(mr, addr1, access_len);
}
if (xen_enabled()) {
xen_invalidate_map_cache_entry(buffer);
@@ -3022,6 +3019,7 @@ void address_space_stl_notdirty(AddressSpace *as, hwaddr addr, uint32_t val,
hwaddr l = 4;
hwaddr addr1;
MemTxResult r;
+ uint8_t dirty_log_mask;
rcu_read_lock();
mr = address_space_translate(as, addr, &addr1, &l,
@@ -3033,14 +3031,9 @@ void address_space_stl_notdirty(AddressSpace *as, hwaddr addr, uint32_t val,
ptr = qemu_get_ram_ptr(addr1);
stl_p(ptr, val);
- if (unlikely(in_migration)) {
- if (cpu_physical_memory_is_clean(addr1)) {
- /* invalidate code */
- tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
- /* set dirty bit */
- cpu_physical_memory_set_dirty_range_nocode(addr1, 4);
- }
- }
+ dirty_log_mask = memory_region_get_dirty_log_mask(mr);
+ dirty_log_mask &= ~(1 << DIRTY_MEMORY_CODE);
+ cpu_physical_memory_set_dirty_range(addr1, 4, dirty_log_mask);
r = MEMTX_OK;
}
if (result) {
@@ -3096,7 +3089,7 @@ static inline void address_space_stl_internal(AddressSpace *as,
stl_p(ptr, val);
break;
}
- invalidate_and_set_dirty(addr1, 4);
+ invalidate_and_set_dirty(mr, addr1, 4);
r = MEMTX_OK;
}
if (result) {
@@ -3200,7 +3193,7 @@ static inline void address_space_stw_internal(AddressSpace *as,
stw_p(ptr, val);
break;
}
- invalidate_and_set_dirty(addr1, 2);
+ invalidate_and_set_dirty(mr, addr1, 2);
r = MEMTX_OK;
}
if (result) {
generated by cgit v1.2.1 (git 2.18.0) at 2024-07-14 01:07:38 +0000