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memory: support stateless memory listeners

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Current memory listeners are incremental; that is, they are expected to
maintain their own state, and receive callbacks for changes to that state.

This patch adds support for stateless listeners; these work by receiving
a ->begin() callback (which tells them that new state is coming), a
sequence of ->region_add() and ->region_nop() callbacks, and then a
->commit() callback which signifies the end of the new state.  They should
ignore ->region_del() callbacks.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2012-02-08 21:36:02 +02:00
parent 4855d41a61
commit 50c1e1491e
6 changed files with 88 additions and 0 deletions
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32
exec.c
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@ -3488,6 +3488,14 @@ static void io_mem_init(void)
"watch", UINT64_MAX);
}
static void core_begin(MemoryListener *listener)
{
}
static void core_commit(MemoryListener *listener)
{
}
static void core_region_add(MemoryListener *listener,
MemoryRegionSection *section)
{
@ -3500,6 +3508,11 @@ static void core_region_del(MemoryListener *listener,
cpu_register_physical_memory_log(section, false);
}
static void core_region_nop(MemoryListener *listener,
MemoryRegionSection *section)
{
}
static void core_log_start(MemoryListener *listener,
MemoryRegionSection *section)
{
@ -3537,6 +3550,14 @@ static void core_eventfd_del(MemoryListener *listener,
{
}
static void io_begin(MemoryListener *listener)
{
}
static void io_commit(MemoryListener *listener)
{
}
static void io_region_add(MemoryListener *listener,
MemoryRegionSection *section)
{
@ -3551,6 +3572,11 @@ static void io_region_del(MemoryListener *listener,
isa_unassign_ioport(section->offset_within_address_space, section->size);
}
static void io_region_nop(MemoryListener *listener,
MemoryRegionSection *section)
{
}
static void io_log_start(MemoryListener *listener,
MemoryRegionSection *section)
{
@ -3587,8 +3613,11 @@ static void io_eventfd_del(MemoryListener *listener,
}
static MemoryListener core_memory_listener = {
.begin = core_begin,
.commit = core_commit,
.region_add = core_region_add,
.region_del = core_region_del,
.region_nop = core_region_nop,
.log_start = core_log_start,
.log_stop = core_log_stop,
.log_sync = core_log_sync,
@ -3600,8 +3629,11 @@ static MemoryListener core_memory_listener = {
};
static MemoryListener io_memory_listener = {
.begin = io_begin,
.commit = io_commit,
.region_add = io_region_add,
.region_del = io_region_del,
.region_nop = io_region_nop,
.log_start = io_log_start,
.log_stop = io_log_stop,
.log_sync = io_log_sync,