58 STATIC STATUS_T OsVmRegionPermissionCheck(LosVmMapRegion *region, UINT32 flags)  in OsVmRegionPermissionCheck()  argument
60     if ((region->regionFlags & VM_MAP_REGION_FLAG_PERM_READ) != VM_MAP_REGION_FLAG_PERM_READ) {  in OsVmRegionPermissionCheck()
61 …VM_ERR("read permission check failed operation flags %x, region flags %x", flags, region->regionFl…  in OsVmRegionPermissionCheck()
66 …      if ((region->regionFlags & VM_MAP_REGION_FLAG_PERM_WRITE) != VM_MAP_REGION_FLAG_PERM_WRITE) {  in OsVmRegionPermissionCheck()
67 …VM_ERR("write permission check failed operation flags %x, region flags %x", flags, region->regionF…  in OsVmRegionPermissionCheck()
73 …  if ((region->regionFlags & VM_MAP_REGION_FLAG_PERM_EXECUTE) != VM_MAP_REGION_FLAG_PERM_EXECUTE) {  in OsVmRegionPermissionCheck()
74 …VM_ERR("exec permission check failed operation flags %x, region flags %x", flags, region->regionFl…  in OsVmRegionPermissionCheck()
100 STATIC STATUS_T OsDoReadFault(LosVmMapRegion *region, LosVmPgFault *vmPgFault)  in OsDoReadFault()  argument
106     LosVmSpace *space = region->space;  in OsDoReadFault()
112     if (region->unTypeData.rf.vmFOps == NULL || region->unTypeData.rf.vmFOps->fault == NULL) {  in OsDoReadFault()
113         VM_ERR("region args invalid, file path: %s", region->unTypeData.rf.vnode->filePath);  in OsDoReadFault()
117     (VOID)LOS_MuxAcquire(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoReadFault()
118     ret = region->unTypeData.rf.vmFOps->fault(region, vmPgFault);  in OsDoReadFault()
127                              region->regionFlags & (~VM_MAP_REGION_FLAG_PERM_WRITE));  in OsDoReadFault()
130             OsDelMapInfo(region, vmPgFault, false);  in OsDoReadFault()
131             (VOID)LOS_MuxRelease(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoReadFault()
135         (VOID)LOS_MuxRelease(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoReadFault()
138     (VOID)LOS_MuxRelease(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoReadFault()
144 STATIC LosVmPage *OsCowUnmapOrg(LosArchMmu *archMmu, LosVmMapRegion *region, LosVmPgFault *vmf)  in OsCowUnmapOrg()  argument
152     LOS_SpinLockSave(&region->unTypeData.rf.vnode->mapping.list_lock, &intSave);  in OsCowUnmapOrg()
153     fpage = OsFindGetEntry(&region->unTypeData.rf.vnode->mapping, vmf->pgoff);  in OsCowUnmapOrg()
166     LOS_SpinUnlockRestore(&region->unTypeData.rf.vnode->mapping.list_lock, intSave);  in OsCowUnmapOrg()
172 status_t OsDoCowFault(LosVmMapRegion *region, LosVmPgFault *vmPgFault)  in OsDoCowFault()  argument
182     if ((vmPgFault == NULL) || (region == NULL) ||  in OsDoCowFault()
183         (region->unTypeData.rf.vmFOps == NULL) || (region->unTypeData.rf.vmFOps->fault == NULL)) {  in OsDoCowFault()
184         VM_ERR("region args invalid");  in OsDoCowFault()
188     space = region->space;  in OsDoCowFault()
191         oldPage = OsCowUnmapOrg(&space->archMmu, region, vmPgFault);  in OsDoCowFault()
204     (VOID)LOS_MuxAcquire(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoCowFault()
205     ret = region->unTypeData.rf.vmFOps->fault(region, vmPgFault);  in OsDoCowFault()
207         VM_ERR("call region->vm_ops->fault fail");  in OsDoCowFault()
208         (VOID)LOS_MuxRelease(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoCowFault()
230 …ret = LOS_ArchMmuMap(&space->archMmu, (VADDR_T)vmPgFault->vaddr, newPaddr, 1, region->regionFlags);  in OsDoCowFault()
234         (VOID)LOS_MuxRelease(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoCowFault()
237     (VOID)LOS_MuxRelease(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoCowFault()
256 status_t OsDoSharedFault(LosVmMapRegion *region, LosVmPgFault *vmPgFault)  in OsDoSharedFault()  argument
262     LosVmSpace *space = region->space;  in OsDoSharedFault()
266     if ((region->unTypeData.rf.vmFOps == NULL) || (region->unTypeData.rf.vmFOps->fault == NULL)) {  in OsDoSharedFault()
267         VM_ERR("region args invalid");  in OsDoSharedFault()
274         ret = LOS_ArchMmuMap(&space->archMmu, vaddr, paddr, 1, region->regionFlags);  in OsDoSharedFault()
280         LOS_SpinLockSave(&region->unTypeData.rf.vnode->mapping.list_lock, &intSave);  in OsDoSharedFault()
281         fpage = OsFindGetEntry(&region->unTypeData.rf.vnode->mapping, vmPgFault->pgoff);  in OsDoSharedFault()
283             OsMarkPageDirty(fpage, region, 0, 0);  in OsDoSharedFault()
285         LOS_SpinUnlockRestore(&region->unTypeData.rf.vnode->mapping.list_lock, intSave);  in OsDoSharedFault()
290     (VOID)LOS_MuxAcquire(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoSharedFault()
291     ret = region->unTypeData.rf.vmFOps->fault(region, vmPgFault);  in OsDoSharedFault()
300         ret = LOS_ArchMmuMap(&space->archMmu, vaddr, paddr, 1, region->regionFlags);  in OsDoSharedFault()
303             OsDelMapInfo(region, vmPgFault, TRUE);  in OsDoSharedFault()
304             (VOID)LOS_MuxRelease(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoSharedFault()
308         (VOID)LOS_MuxRelease(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoSharedFault()
311     (VOID)LOS_MuxRelease(&region->unTypeData.rf.vnode->mapping.mux_lock);  in OsDoSharedFault()
317  * and make a read permission mmapping (region->arch_mmu_flags & (~ARCH_MMU_FLAG_PERM_WRITE)).
321  * region->arch_mmu_flags and the changes on this page will write through to the underlying file
323 STATIC STATUS_T OsDoFileFault(LosVmMapRegion *region, LosVmPgFault *vmPgFault, UINT32 flags)  in OsDoFileFault()  argument
328         if (region->regionFlags & VM_MAP_REGION_FLAG_SHARED) {  in OsDoFileFault()
329             ret = OsDoSharedFault(region, vmPgFault);  in OsDoFileFault()
331             ret = OsDoCowFault(region, vmPgFault);  in OsDoFileFault()
334         ret = OsDoReadFault(region, vmPgFault);  in OsDoFileFault()
342     LosVmMapRegion *region = NULL;  in OsVmPageFaultHandler()  local
369     region = LOS_RegionFind(space, vaddr);  in OsVmPageFaultHandler()
370     if (region == NULL) {  in OsVmPageFaultHandler()
371         VM_ERR("region not exists, vaddr: %#x", vaddr);  in OsVmPageFaultHandler()
376     status = OsVmRegionPermissionCheck(region, flags);  in OsVmPageFaultHandler()
394     if (LOS_IsRegionFileValid(region)) {  in OsVmPageFaultHandler()
395         if (region->unTypeData.rf.vnode == NULL) {  in OsVmPageFaultHandler()
399         vmPgFault.pgoff = ((vaddr - region->range.base) >> PAGE_SHIFT) + region->pgOff;  in OsVmPageFaultHandler()
403         status = OsDoFileFault(region, &vmPgFault, flags);  in OsVmPageFaultHandler()
431         status = LOS_ArchMmuMap(&space->archMmu, vaddr, newPaddr, 1, region->regionFlags);  in OsVmPageFaultHandler()
443         status = LOS_ArchMmuMap(&space->archMmu, vaddr, newPaddr, 1, region->regionFlags);  in OsVmPageFaultHandler()