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exec: separate current radix tree from the one being built 

This same treatment previously done to phys_node_map and phys_sections
is now applied to the dispatch field of AddressSpace.  Topology updates
use as->next_dispatch while accesses use as->dispatch.

Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-05-29 12:13:54 +02:00
parent 89ae337acb
commit 0075270317
2 changed files with 17 additions and 7 deletions
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23
exec.c
View File

@ -841,7 +841,7 @@ static void register_multipage(AddressSpaceDispatch *d,
static void mem_add(MemoryListener *listener, MemoryRegionSection *section)
{
AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener);
AddressSpaceDispatch *d = as->dispatch;
AddressSpaceDispatch *d = as->next_dispatch;
MemoryRegionSection now = *section, remain = *section;
Int128 page_size = int128_make64(TARGET_PAGE_SIZE);
@ -1702,11 +1702,23 @@ static void io_mem_init(void)
}
static void mem_begin(MemoryListener *listener)
{
AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener);
AddressSpaceDispatch *d = g_new(AddressSpaceDispatch, 1);
d->phys_map = (PhysPageEntry) { .ptr = PHYS_MAP_NODE_NIL, .is_leaf = 0 };
d->as = as;
as->next_dispatch = d;
}
static void mem_commit(MemoryListener *listener)
{
AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener);
AddressSpaceDispatch *d = as->dispatch;
d->phys_map.ptr = PHYS_MAP_NODE_NIL;
/* cur_map will soon be switched to next_map, too. */
as->dispatch = as->next_dispatch;
g_free(d);
}
static void core_begin(MemoryListener *listener)
@ -1770,13 +1782,10 @@ static MemoryListener tcg_memory_listener = {
void address_space_init_dispatch(AddressSpace *as)
{
AddressSpaceDispatch *d = g_new(AddressSpaceDispatch, 1);
d->phys_map = (PhysPageEntry) { .ptr = PHYS_MAP_NODE_NIL, .is_leaf = 0 };
d->as = as;
as->dispatch = d;
as->dispatch = NULL;
as->dispatch_listener = (MemoryListener) {
.begin = mem_begin,
.commit = mem_commit,
.region_add = mem_add,
.region_nop = mem_add,
.priority = 0,

1
include/exec/memory.h
View File

@ -209,6 +209,7 @@ struct AddressSpace {
int ioeventfd_nb;
struct MemoryRegionIoeventfd *ioeventfds;
struct AddressSpaceDispatch *dispatch;
struct AddressSpaceDispatch *next_dispatch;
MemoryListener dispatch_listener;
QTAILQ_ENTRY(AddressSpace) address_spaces_link;