Yaya48
cf256aa081
Upstream: https://gitlab.com/qemu-project/qemu.git Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
|
|
* BlockBackend RAM Registrar
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "system/block-backend.h"
|
|
#include "system/block-ram-registrar.h"
|
|
#include "qapi/error.h"
|
|
|
|
static void ram_block_added(RAMBlockNotifier *n, void *host, size_t size,
|
|
size_t max_size)
|
|
{
|
|
BlockRAMRegistrar *r = container_of(n, BlockRAMRegistrar, notifier);
|
|
Error *err = NULL;
|
|
|
|
if (!r->ok) {
|
|
return; /* don't try again if we've already failed */
|
|
}
|
|
|
|
if (!blk_register_buf(r->blk, host, max_size, &err)) {
|
|
error_report_err(err);
|
|
ram_block_notifier_remove(&r->notifier);
|
|
r->ok = false;
|
|
}
|
|
}
|
|
|
|
static void ram_block_removed(RAMBlockNotifier *n, void *host, size_t size,
|
|
size_t max_size)
|
|
{
|
|
BlockRAMRegistrar *r = container_of(n, BlockRAMRegistrar, notifier);
|
|
blk_unregister_buf(r->blk, host, max_size);
|
|
}
|
|
|
|
void blk_ram_registrar_init(BlockRAMRegistrar *r, BlockBackend *blk)
|
|
{
|
|
r->blk = blk;
|
|
r->notifier = (RAMBlockNotifier){
|
|
.ram_block_added = ram_block_added,
|
|
.ram_block_removed = ram_block_removed,
|
|
|
|
/*
|
|
* .ram_block_resized() is not necessary because we use the max_size
|
|
* value that does not change across resize.
|
|
*/
|
|
};
|
|
r->ok = true;
|
|
|
|
ram_block_notifier_add(&r->notifier);
|
|
}
|
|
|
|
void blk_ram_registrar_destroy(BlockRAMRegistrar *r)
|
|
{
|
|
if (r->ok) {
|
|
ram_block_notifier_remove(&r->notifier);
|
|
}
|
|
}
|