memory: allow MemoryListeners to observe a specific address space
Ignore any regions not belonging to a specified address space. Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
parent
8df8a8436f
commit
7376e5827a
2
exec.c
2
exec.c
|
@ -3571,7 +3571,7 @@ static void memory_map_init(void)
|
||||||
memory_region_init(system_io, "io", 65536);
|
memory_region_init(system_io, "io", 65536);
|
||||||
set_system_io_map(system_io);
|
set_system_io_map(system_io);
|
||||||
|
|
||||||
memory_listener_register(&core_memory_listener);
|
memory_listener_register(&core_memory_listener, NULL);
|
||||||
}
|
}
|
||||||
|
|
||||||
MemoryRegion *get_system_memory(void)
|
MemoryRegion *get_system_memory(void)
|
||||||
|
|
|
@ -774,7 +774,7 @@ int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force)
|
||||||
hdev->log_size = 0;
|
hdev->log_size = 0;
|
||||||
hdev->log_enabled = false;
|
hdev->log_enabled = false;
|
||||||
hdev->started = false;
|
hdev->started = false;
|
||||||
memory_listener_register(&hdev->memory_listener);
|
memory_listener_register(&hdev->memory_listener, NULL);
|
||||||
hdev->force = force;
|
hdev->force = force;
|
||||||
return 0;
|
return 0;
|
||||||
fail:
|
fail:
|
||||||
|
|
|
@ -1049,7 +1049,7 @@ int kvm_init(void)
|
||||||
}
|
}
|
||||||
|
|
||||||
kvm_state = s;
|
kvm_state = s;
|
||||||
memory_listener_register(&kvm_memory_listener);
|
memory_listener_register(&kvm_memory_listener, NULL);
|
||||||
|
|
||||||
s->many_ioeventfds = kvm_check_many_ioeventfds();
|
s->many_ioeventfds = kvm_check_many_ioeventfds();
|
||||||
|
|
||||||
|
|
45
memory.c
45
memory.c
|
@ -84,7 +84,14 @@ static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
|
||||||
|
|
||||||
enum ListenerDirection { Forward, Reverse };
|
enum ListenerDirection { Forward, Reverse };
|
||||||
|
|
||||||
#define MEMORY_LISTENER_CALL(_callback, _direction, _args...) \
|
static bool memory_listener_match(MemoryListener *listener,
|
||||||
|
MemoryRegionSection *section)
|
||||||
|
{
|
||||||
|
return !listener->address_space_filter
|
||||||
|
|| listener->address_space_filter == section->address_space;
|
||||||
|
}
|
||||||
|
|
||||||
|
#define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
|
||||||
do { \
|
do { \
|
||||||
MemoryListener *_listener; \
|
MemoryListener *_listener; \
|
||||||
\
|
\
|
||||||
|
@ -105,15 +112,40 @@ enum ListenerDirection { Forward, Reverse };
|
||||||
} \
|
} \
|
||||||
} while (0)
|
} while (0)
|
||||||
|
|
||||||
|
#define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
|
||||||
|
do { \
|
||||||
|
MemoryListener *_listener; \
|
||||||
|
\
|
||||||
|
switch (_direction) { \
|
||||||
|
case Forward: \
|
||||||
|
QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
|
||||||
|
if (memory_listener_match(_listener, _section)) { \
|
||||||
|
_listener->_callback(_listener, _section, ##_args); \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
break; \
|
||||||
|
case Reverse: \
|
||||||
|
QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
|
||||||
|
memory_listeners, link) { \
|
||||||
|
if (memory_listener_match(_listener, _section)) { \
|
||||||
|
_listener->_callback(_listener, _section, ##_args); \
|
||||||
|
} \
|
||||||
|
} \
|
||||||
|
break; \
|
||||||
|
default: \
|
||||||
|
abort(); \
|
||||||
|
} \
|
||||||
|
} while (0)
|
||||||
|
|
||||||
#define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
|
#define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
|
||||||
MEMORY_LISTENER_CALL(callback, dir, &(MemoryRegionSection) { \
|
MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
|
||||||
.mr = (fr)->mr, \
|
.mr = (fr)->mr, \
|
||||||
.address_space = (as)->root, \
|
.address_space = (as)->root, \
|
||||||
.offset_within_region = (fr)->offset_in_region, \
|
.offset_within_region = (fr)->offset_in_region, \
|
||||||
.size = int128_get64((fr)->addr.size), \
|
.size = int128_get64((fr)->addr.size), \
|
||||||
.offset_within_address_space = int128_get64((fr)->addr.start), \
|
.offset_within_address_space = int128_get64((fr)->addr.start), \
|
||||||
.readonly = (fr)->readonly, \
|
.readonly = (fr)->readonly, \
|
||||||
})
|
}))
|
||||||
|
|
||||||
struct CoalescedMemoryRange {
|
struct CoalescedMemoryRange {
|
||||||
AddrRange addr;
|
AddrRange addr;
|
||||||
|
@ -1382,13 +1414,13 @@ void memory_global_sync_dirty_bitmap(MemoryRegion *address_space)
|
||||||
void memory_global_dirty_log_start(void)
|
void memory_global_dirty_log_start(void)
|
||||||
{
|
{
|
||||||
global_dirty_log = true;
|
global_dirty_log = true;
|
||||||
MEMORY_LISTENER_CALL(log_global_start, Forward);
|
MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward);
|
||||||
}
|
}
|
||||||
|
|
||||||
void memory_global_dirty_log_stop(void)
|
void memory_global_dirty_log_stop(void)
|
||||||
{
|
{
|
||||||
global_dirty_log = false;
|
global_dirty_log = false;
|
||||||
MEMORY_LISTENER_CALL(log_global_stop, Reverse);
|
MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse);
|
||||||
}
|
}
|
||||||
|
|
||||||
static void listener_add_address_space(MemoryListener *listener,
|
static void listener_add_address_space(MemoryListener *listener,
|
||||||
|
@ -1412,10 +1444,11 @@ static void listener_add_address_space(MemoryListener *listener,
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
void memory_listener_register(MemoryListener *listener)
|
void memory_listener_register(MemoryListener *listener, MemoryRegion *filter)
|
||||||
{
|
{
|
||||||
MemoryListener *other = NULL;
|
MemoryListener *other = NULL;
|
||||||
|
|
||||||
|
listener->address_space_filter = filter;
|
||||||
if (QTAILQ_EMPTY(&memory_listeners)
|
if (QTAILQ_EMPTY(&memory_listeners)
|
||||||
|| listener->priority >= QTAILQ_LAST(&memory_listeners,
|
|| listener->priority >= QTAILQ_LAST(&memory_listeners,
|
||||||
memory_listeners)->priority) {
|
memory_listeners)->priority) {
|
||||||
|
|
4
memory.h
4
memory.h
|
@ -193,6 +193,7 @@ struct MemoryListener {
|
||||||
bool match_data, uint64_t data, int fd);
|
bool match_data, uint64_t data, int fd);
|
||||||
/* Lower = earlier (during add), later (during del) */
|
/* Lower = earlier (during add), later (during del) */
|
||||||
unsigned priority;
|
unsigned priority;
|
||||||
|
MemoryRegion *address_space_filter;
|
||||||
QTAILQ_ENTRY(MemoryListener) link;
|
QTAILQ_ENTRY(MemoryListener) link;
|
||||||
};
|
};
|
||||||
|
|
||||||
|
@ -685,8 +686,9 @@ void memory_region_transaction_commit(void);
|
||||||
* space
|
* space
|
||||||
*
|
*
|
||||||
* @listener: an object containing the callbacks to be called
|
* @listener: an object containing the callbacks to be called
|
||||||
|
* @filter: if non-%NULL, only regions in this address space will be observed
|
||||||
*/
|
*/
|
||||||
void memory_listener_register(MemoryListener *listener);
|
void memory_listener_register(MemoryListener *listener, MemoryRegion *filter);
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* memory_listener_unregister: undo the effect of memory_listener_register()
|
* memory_listener_unregister: undo the effect of memory_listener_register()
|
||||||
|
|
|
@ -989,7 +989,7 @@ int xen_hvm_init(void)
|
||||||
|
|
||||||
state->memory_listener = xen_memory_listener;
|
state->memory_listener = xen_memory_listener;
|
||||||
QLIST_INIT(&state->physmap);
|
QLIST_INIT(&state->physmap);
|
||||||
memory_listener_register(&state->memory_listener);
|
memory_listener_register(&state->memory_listener, NULL);
|
||||||
state->log_for_dirtybit = NULL;
|
state->log_for_dirtybit = NULL;
|
||||||
|
|
||||||
/* Initialize backend core & drivers */
|
/* Initialize backend core & drivers */
|
||||||
|
|
Loading…
Reference in a new issue