2b10808539
There are a couple places (one generic, one target specific) where we need to get the host page size associated with a particular memory backend. I have some upcoming code which will add another place which wants this. So, for convenience, add a helper function to calculate this. host_memory_backend_pagesize() returns the host pagesize for a given HostMemoryBackend object. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Greg Kurz <groug@kaod.org> Acked-by: Paolo Bonzini <pbonzini@redhat.com>
74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/*
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* QEMU Host Memory Backend
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*
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* Copyright (C) 2013-2014 Red Hat Inc
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*
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* Authors:
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* Igor Mammedov <imammedo@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef SYSEMU_HOSTMEM_H
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#define SYSEMU_HOSTMEM_H
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#include "sysemu/sysemu.h" /* for MAX_NODES */
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#include "qapi/qapi-types-misc.h"
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#include "qom/object.h"
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#include "exec/memory.h"
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#include "qemu/bitmap.h"
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#define TYPE_MEMORY_BACKEND "memory-backend"
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#define MEMORY_BACKEND(obj) \
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OBJECT_CHECK(HostMemoryBackend, (obj), TYPE_MEMORY_BACKEND)
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#define MEMORY_BACKEND_GET_CLASS(obj) \
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OBJECT_GET_CLASS(HostMemoryBackendClass, (obj), TYPE_MEMORY_BACKEND)
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#define MEMORY_BACKEND_CLASS(klass) \
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OBJECT_CLASS_CHECK(HostMemoryBackendClass, (klass), TYPE_MEMORY_BACKEND)
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typedef struct HostMemoryBackend HostMemoryBackend;
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typedef struct HostMemoryBackendClass HostMemoryBackendClass;
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/**
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* HostMemoryBackendClass:
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* @parent_class: opaque parent class container
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*/
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struct HostMemoryBackendClass {
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ObjectClass parent_class;
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void (*alloc)(HostMemoryBackend *backend, Error **errp);
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};
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/**
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* @HostMemoryBackend
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*
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* @parent: opaque parent object container
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* @size: amount of memory backend provides
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* @mr: MemoryRegion representing host memory belonging to backend
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*/
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struct HostMemoryBackend {
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/* private */
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Object parent;
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/* protected */
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char *id;
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uint64_t size;
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bool merge, dump;
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bool prealloc, force_prealloc, is_mapped, share;
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DECLARE_BITMAP(host_nodes, MAX_NODES + 1);
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HostMemPolicy policy;
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MemoryRegion mr;
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};
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bool host_memory_backend_mr_inited(HostMemoryBackend *backend);
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MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend,
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Error **errp);
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void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped);
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bool host_memory_backend_is_mapped(HostMemoryBackend *backend);
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size_t host_memory_backend_pagesize(HostMemoryBackend *memdev);
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#endif
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