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memory: call begin, log_start and commit when registering a new listener

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This ensures that cpu_reload_memory_map() is called as soon as
tcg_cpu_address_space_init() is called, and before cpu->memory_dispatch
is used.  qemu-system-s390x never changes the address spaces after
tcg_cpu_address_space_init() is called, and thus tcg_commit() is never
called.  This causes a SIGSEGV.

Because memory_map_init() will now call mem_commit(), we have to
initialize io_mem_* before address_space_memory and friends.

Reported-by: Philipp Kern <pkern@debian.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Fixes: 0a1c71cec6
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-11-02 09:23:52 +01:00
parent 69fbd0ea25
commit 680a4783dc
2 changed files with 10 additions and 1 deletions
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2
exec.c
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@ -2694,8 +2694,8 @@ void cpu_register_map_client(QEMUBH *bh)
void cpu_exec_init_all(void)
{
qemu_mutex_init(&ram_list.mutex);
memory_map_init();
io_mem_init();
memory_map_init();
qemu_mutex_init(&map_client_list_lock);
}

9
memory.c
View file

@ -2036,6 +2036,9 @@ static void listener_add_address_space(MemoryListener *listener,
return;
}
if (listener->begin) {
listener->begin(listener);
}
if (global_dirty_log) {
if (listener->log_global_start) {
listener->log_global_start(listener);
@ -2052,10 +2055,16 @@ static void listener_add_address_space(MemoryListener *listener,
.offset_within_address_space = int128_get64(fr->addr.start),
.readonly = fr->readonly,
};
if (fr->dirty_log_mask && listener->log_start) {
listener->log_start(listener, &section, 0, fr->dirty_log_mask);
}
if (listener->region_add) {
listener->region_add(listener, &section);
}
}
if (listener->commit) {
listener->commit(listener);
}
flatview_unref(view);
}