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 extern const MemoryRegionOps unassigned_mem_ops; 35 36 bool memory_region_access_valid(MemoryRegion *mr, hwaddr addr, 37 unsigned size, bool is_write); 38 39 void flatview_add_to_dispatch(FlatView *fv, MemoryRegionSection *section); 40 AddressSpaceDispatch *address_space_dispatch_new(FlatView *fv); 41 void address_space_dispatch_compact(AddressSpaceDispatch *d); 42 void address_space_dispatch_free(AddressSpaceDispatch *d); 43 44 void 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 */ 57 typedef 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 */ 98 void 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 */ 108 void memory_notdirty_write_complete(NotDirtyInfo *ndi); 109 110 #endif 111 #endif 112