提交 545e92e0 编写于 作者: A Avi Kivity 提交者: Anthony Liguori

memory: reclaim resources when a memory region is destroyed for good

Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
上级 76dc3cf8
......@@ -661,6 +661,25 @@ void memory_region_transaction_commit(void)
memory_region_update_topology();
}
static void memory_region_destructor_none(MemoryRegion *mr)
{
}
static void memory_region_destructor_ram(MemoryRegion *mr)
{
qemu_ram_free(mr->ram_addr);
}
static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr)
{
qemu_ram_free_from_ptr(mr->ram_addr);
}
static void memory_region_destructor_iomem(MemoryRegion *mr)
{
cpu_unregister_io_memory(mr->ram_addr);
}
void memory_region_init(MemoryRegion *mr,
const char *name,
uint64_t size)
......@@ -671,6 +690,7 @@ void memory_region_init(MemoryRegion *mr,
mr->addr = 0;
mr->offset = 0;
mr->terminates = false;
mr->destructor = memory_region_destructor_none;
mr->priority = 0;
mr->may_overlap = false;
mr->alias = NULL;
......@@ -833,6 +853,7 @@ static void memory_region_prepare_ram_addr(MemoryRegion *mr)
return;
}
mr->destructor = memory_region_destructor_iomem;
mr->ram_addr = cpu_register_io_memory(memory_region_read_thunk,
memory_region_write_thunk,
mr,
......@@ -860,6 +881,7 @@ void memory_region_init_ram(MemoryRegion *mr,
{
memory_region_init(mr, name, size);
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
mr->ram_addr = qemu_ram_alloc(dev, name, size);
mr->backend_registered = true;
}
......@@ -872,6 +894,7 @@ void memory_region_init_ram_ptr(MemoryRegion *mr,
{
memory_region_init(mr, name, size);
mr->terminates = true;
mr->destructor = memory_region_destructor_ram_from_ptr;
mr->ram_addr = qemu_ram_alloc_from_ptr(dev, name, size, ptr);
mr->backend_registered = true;
}
......@@ -890,6 +913,7 @@ void memory_region_init_alias(MemoryRegion *mr,
void memory_region_destroy(MemoryRegion *mr)
{
assert(QTAILQ_EMPTY(&mr->subregions));
mr->destructor(mr);
memory_region_clear_coalescing(mr);
qemu_free((char *)mr->name);
qemu_free(mr->ioeventfds);
......
......@@ -109,6 +109,7 @@ struct MemoryRegion {
target_phys_addr_t addr;
target_phys_addr_t offset;
bool backend_registered;
void (*destructor)(MemoryRegion *mr);
ram_addr_t ram_addr;
IORange iorange;
bool terminates;
......
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