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 24 static inline AddressSpaceDispatch *flatview_to_dispatch(FlatView *fv) 25 { 26 return fv->dispatch; 27 } 28 29 static inline AddressSpaceDispatch *address_space_to_dispatch(AddressSpace *as) 30 { 31 return flatview_to_dispatch(address_space_to_flatview(as)); 32 } 33 34 FlatView *address_space_get_flatview(AddressSpace *as); 35 void flatview_unref(FlatView *view); 36 37 extern const MemoryRegionOps unassigned_mem_ops; 38 39 bool memory_region_access_valid(MemoryRegion *mr, hwaddr addr, 40 unsigned size, bool is_write, 41 MemTxAttrs attrs); 42 43 void flatview_add_to_dispatch(FlatView *fv, MemoryRegionSection *section); 44 AddressSpaceDispatch *address_space_dispatch_new(FlatView *fv); 45 void address_space_dispatch_compact(AddressSpaceDispatch *d); 46 void address_space_dispatch_free(AddressSpaceDispatch *d); 47 48 void mtree_print_dispatch(struct AddressSpaceDispatch *d, 49 MemoryRegion *root); 50 51 struct page_collection; 52 53 /* Opaque struct for passing info from memory_notdirty_write_prepare() 54 * to memory_notdirty_write_complete(). Callers should treat all fields 55 * as private, with the exception of @active. 56 * 57 * @active is a field which is not touched by either the prepare or 58 * complete functions, but which the caller can use if it wishes to 59 * track whether it has called prepare for this struct and so needs 60 * to later call the complete function. 61 */ 62 typedef struct { 63 CPUState *cpu; 64 struct page_collection *pages; 65 ram_addr_t ram_addr; 66 vaddr mem_vaddr; 67 unsigned size; 68 bool active; 69 } NotDirtyInfo; 70 71 /** 72 * memory_notdirty_write_prepare: call before writing to non-dirty memory 73 * @ndi: pointer to opaque NotDirtyInfo struct 74 * @cpu: CPU doing the write 75 * @mem_vaddr: virtual address of write 76 * @ram_addr: the ram address of the write 77 * @size: size of write in bytes 78 * 79 * Any code which writes to the host memory corresponding to 80 * guest RAM which has been marked as NOTDIRTY must wrap those 81 * writes in calls to memory_notdirty_write_prepare() and 82 * memory_notdirty_write_complete(): 83 * 84 * NotDirtyInfo ndi; 85 * memory_notdirty_write_prepare(&ndi, ....); 86 * ... perform write here ... 87 * memory_notdirty_write_complete(&ndi); 88 * 89 * These calls will ensure that we flush any TCG translated code for 90 * the memory being written, update the dirty bits and (if possible) 91 * remove the slowpath callback for writing to the memory. 92 * 93 * This must only be called if we are using TCG; it will assert otherwise. 94 * 95 * We may take locks in the prepare call, so callers must ensure that 96 * they don't exit (via longjump or otherwise) without calling complete. 97 * 98 * This call must only be made inside an RCU critical section. 99 * (Note that while we're executing a TCG TB we're always in an 100 * RCU critical section, which is likely to be the case for callers 101 * of these functions.) 102 */ 103 void memory_notdirty_write_prepare(NotDirtyInfo *ndi, 104 CPUState *cpu, 105 vaddr mem_vaddr, 106 ram_addr_t ram_addr, 107 unsigned size); 108 /** 109 * memory_notdirty_write_complete: finish write to non-dirty memory 110 * @ndi: pointer to the opaque NotDirtyInfo struct which was initialized 111 * by memory_not_dirty_write_prepare(). 112 */ 113 void memory_notdirty_write_complete(NotDirtyInfo *ndi); 114 115 #endif 116 #endif 117