motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-05 08:43:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

block: add BlockRAMRegistrar

Browse source 
Emulated devices and other BlockBackend users wishing to take advantage
of blk_register_buf() all have the same repetitive job: register
RAMBlocks with the BlockBackend using RAMBlockNotifier.

Add a BlockRAMRegistrar API to do this. A later commit will use this
from hw/block/virtio-blk.c.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20221013185908.1297568-10-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2022-10-13 14:59:04 -04:00
parent 4fdd0a1a7e
commit 7f9241d805
4 changed files with 97 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

37
include/sysemu/block-ram-registrar.h Normal file
View file

@ -0,0 +1,37 @@
/*
* BlockBackend RAM Registrar
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef BLOCK_RAM_REGISTRAR_H
#define BLOCK_RAM_REGISTRAR_H
#include "exec/ramlist.h"
/**
* struct BlockRAMRegistrar:
*
* Keeps RAMBlock memory registered with a BlockBackend using
* blk_register_buf() including hotplugged memory.
*
* Emulated devices or other BlockBackend users initialize a BlockRAMRegistrar
* with blk_ram_registrar_init() before submitting I/O requests with the
* BDRV_REQ_REGISTERED_BUF flag set.
*/
typedef struct {
BlockBackend *blk;
RAMBlockNotifier notifier;
bool ok;
} BlockRAMRegistrar;
void blk_ram_registrar_init(BlockRAMRegistrar *r, BlockBackend *blk);
void blk_ram_registrar_destroy(BlockRAMRegistrar *r);
/* Have all RAMBlocks been registered successfully? */
static inline bool blk_ram_registrar_ok(BlockRAMRegistrar *r)
{
return r->ok;
}
#endif /* BLOCK_RAM_REGISTRAR_H */