fdb63cf3b5
Following the example documented since commit e3fe3988d7 ("error:
Document Error API usage rules"), have HostMemoryBackendClass::alloc
return a boolean indicating whether an error is set or not.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Message-Id: <20231120213301.24349-17-philmd@linaro.org>
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/*
|
|
* QEMU Host Memory Backend
|
|
*
|
|
* Copyright (C) 2013-2014 Red Hat Inc
|
|
*
|
|
* Authors:
|
|
* Igor Mammedov <imammedo@redhat.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#ifndef SYSEMU_HOSTMEM_H
|
|
#define SYSEMU_HOSTMEM_H
|
|
|
|
#include "sysemu/numa.h"
|
|
#include "qapi/qapi-types-machine.h"
|
|
#include "qom/object.h"
|
|
#include "exec/memory.h"
|
|
#include "qemu/bitmap.h"
|
|
#include "qemu/thread-context.h"
|
|
|
|
#define TYPE_MEMORY_BACKEND "memory-backend"
|
|
OBJECT_DECLARE_TYPE(HostMemoryBackend, HostMemoryBackendClass,
|
|
MEMORY_BACKEND)
|
|
|
|
/* hostmem-ram.c */
|
|
/**
|
|
* @TYPE_MEMORY_BACKEND_RAM:
|
|
* name of backend that uses mmap on the anonymous RAM
|
|
*/
|
|
|
|
#define TYPE_MEMORY_BACKEND_RAM "memory-backend-ram"
|
|
|
|
/* hostmem-file.c */
|
|
/**
|
|
* @TYPE_MEMORY_BACKEND_FILE:
|
|
* name of backend that uses mmap on a file descriptor
|
|
*/
|
|
#define TYPE_MEMORY_BACKEND_FILE "memory-backend-file"
|
|
|
|
|
|
/**
|
|
* HostMemoryBackendClass:
|
|
* @parent_class: opaque parent class container
|
|
*/
|
|
struct HostMemoryBackendClass {
|
|
ObjectClass parent_class;
|
|
|
|
/**
|
|
* alloc: Allocate memory from backend.
|
|
*
|
|
* @backend: the #HostMemoryBackend.
|
|
* @errp: pointer to Error*, to store an error if it happens.
|
|
*
|
|
* Return: true on success, else false setting @errp with error.
|
|
*/
|
|
bool (*alloc)(HostMemoryBackend *backend, Error **errp);
|
|
};
|
|
|
|
/**
|
|
* @HostMemoryBackend
|
|
*
|
|
* @parent: opaque parent object container
|
|
* @size: amount of memory backend provides
|
|
* @mr: MemoryRegion representing host memory belonging to backend
|
|
* @prealloc_threads: number of threads to be used for preallocatining RAM
|
|
*/
|
|
struct HostMemoryBackend {
|
|
/* private */
|
|
Object parent;
|
|
|
|
/* protected */
|
|
uint64_t size;
|
|
bool merge, dump, use_canonical_path;
|
|
bool prealloc, is_mapped, share, reserve;
|
|
uint32_t prealloc_threads;
|
|
ThreadContext *prealloc_context;
|
|
DECLARE_BITMAP(host_nodes, MAX_NODES + 1);
|
|
HostMemPolicy policy;
|
|
|
|
MemoryRegion mr;
|
|
};
|
|
|
|
bool host_memory_backend_mr_inited(HostMemoryBackend *backend);
|
|
MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend);
|
|
|
|
void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped);
|
|
bool host_memory_backend_is_mapped(HostMemoryBackend *backend);
|
|
size_t host_memory_backend_pagesize(HostMemoryBackend *memdev);
|
|
char *host_memory_backend_get_name(HostMemoryBackend *backend);
|
|
|
|
#endif
|