jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
1/*
2 * Declarations for functions which are internal to the memory subsystem.
3 *
4 * Copyright 2011 Red Hat, Inc. and/or its affiliates
5 *
6 * Authors:
7 * Avi Kivity <avi@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or
10 * later. See the COPYING file in the top-level directory.
11 *
12 */
13
14/*
15 * This header is for use by exec.c, memory.c and accel/tcg/cputlb.c ONLY,
16 * for declarations which are shared between the memory subsystem's
17 * internals and the TCG TLB code. Do not include it from elsewhere.
18 */
19
20#ifndef MEMORY_INTERNAL_H
21#define MEMORY_INTERNAL_H
22
23#ifndef CONFIG_USER_ONLY
24static inline AddressSpaceDispatch *flatview_to_dispatch(FlatView *fv)
25{
26 return fv->dispatch;
27}
28
29static inline AddressSpaceDispatch *address_space_to_dispatch(AddressSpace *as)
30{
31 return flatview_to_dispatch(address_space_to_flatview(as));
32}
33
34extern const MemoryRegionOps unassigned_mem_ops;
35
36bool memory_region_access_valid(MemoryRegion *mr, hwaddr addr,
37 unsigned size, bool is_write);
38
39void flatview_add_to_dispatch(FlatView *fv, MemoryRegionSection *section);
40AddressSpaceDispatch *address_space_dispatch_new(FlatView *fv);
41void address_space_dispatch_compact(AddressSpaceDispatch *d);
42void address_space_dispatch_free(AddressSpaceDispatch *d);
43
44void mtree_print_dispatch(fprintf_function mon, void *f,
45 struct AddressSpaceDispatch *d,
46 MemoryRegion *root);
47
48/* Opaque struct for passing info from memory_notdirty_write_prepare()
49 * to memory_notdirty_write_complete(). Callers should treat all fields
50 * as private, with the exception of @active.
51 *
52 * @active is a field which is not touched by either the prepare or
53 * complete functions, but which the caller can use if it wishes to
54 * track whether it has called prepare for this struct and so needs
55 * to later call the complete function.
56 */
57typedef struct {
58 CPUState *cpu;
59 ram_addr_t ram_addr;
60 vaddr mem_vaddr;
61 unsigned size;
62 bool locked;
63 bool active;
64} NotDirtyInfo;
65
66/**
67 * memory_notdirty_write_prepare: call before writing to non-dirty memory
68 * @ndi: pointer to opaque NotDirtyInfo struct
69 * @cpu: CPU doing the write
70 * @mem_vaddr: virtual address of write
71 * @ram_addr: the ram address of the write
72 * @size: size of write in bytes
73 *
74 * Any code which writes to the host memory corresponding to
75 * guest RAM which has been marked as NOTDIRTY must wrap those
76 * writes in calls to memory_notdirty_write_prepare() and
77 * memory_notdirty_write_complete():
78 *
79 * NotDirtyInfo ndi;
80 * memory_notdirty_write_prepare(&ndi, ....);
81 * ... perform write here ...
82 * memory_notdirty_write_complete(&ndi);
83 *
84 * These calls will ensure that we flush any TCG translated code for
85 * the memory being written, update the dirty bits and (if possible)
86 * remove the slowpath callback for writing to the memory.
87 *
88 * This must only be called if we are using TCG; it will assert otherwise.
89 *
90 * We may take a lock in the prepare call, so callers must ensure that
91 * they don't exit (via longjump or otherwise) without calling complete.
92 *
93 * This call must only be made inside an RCU critical section.
94 * (Note that while we're executing a TCG TB we're always in an
95 * RCU critical section, which is likely to be the case for callers
96 * of these functions.)
97 */
98void memory_notdirty_write_prepare(NotDirtyInfo *ndi,
99 CPUState *cpu,
100 vaddr mem_vaddr,
101 ram_addr_t ram_addr,
102 unsigned size);
103/**
104 * memory_notdirty_write_complete: finish write to non-dirty memory
105 * @ndi: pointer to the opaque NotDirtyInfo struct which was initialized
106 * by memory_not_dirty_write_prepare().
107 */
108void memory_notdirty_write_complete(NotDirtyInfo *ndi);
109
110#endif
111#endif