| /* |
| * Physical memory management |
| * |
| * Copyright 2011 Red Hat, Inc. and/or its affiliates |
| * |
| * Authors: |
| * Avi Kivity <avi@redhat.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2. See |
| * the COPYING file in the top-level directory. |
| * |
| * Contributions after 2012-01-13 are licensed under the terms of the |
| * GNU GPL, version 2 or (at your option) any later version. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| #include "cpu.h" |
| #include "exec/memory.h" |
| #include "exec/address-spaces.h" |
| #include "qapi/visitor.h" |
| #include "qemu/bitops.h" |
| #include "qemu/error-report.h" |
| #include "qemu/main-loop.h" |
| #include "qemu/qemu-print.h" |
| #include "qom/object.h" |
| #include "trace-root.h" |
| |
| #include "exec/memory-internal.h" |
| #include "exec/ram_addr.h" |
| #include "sysemu/kvm.h" |
| #include "sysemu/runstate.h" |
| #include "sysemu/tcg.h" |
| #include "sysemu/accel.h" |
| #include "hw/boards.h" |
| #include "migration/vmstate.h" |
| |
| //#define DEBUG_UNASSIGNED |
| |
| static unsigned memory_region_transaction_depth; |
| static bool memory_region_update_pending; |
| static bool ioeventfd_update_pending; |
| bool global_dirty_log; |
| |
| static QTAILQ_HEAD(, MemoryListener) memory_listeners |
| = QTAILQ_HEAD_INITIALIZER(memory_listeners); |
| |
| static QTAILQ_HEAD(, AddressSpace) address_spaces |
| = QTAILQ_HEAD_INITIALIZER(address_spaces); |
| |
| static GHashTable *flat_views; |
| |
| typedef struct AddrRange AddrRange; |
| |
| /* |
| * Note that signed integers are needed for negative offsetting in aliases |
| * (large MemoryRegion::alias_offset). |
| */ |
| struct AddrRange { |
| Int128 start; |
| Int128 size; |
| }; |
| |
| static AddrRange addrrange_make(Int128 start, Int128 size) |
| { |
| return (AddrRange) { start, size }; |
| } |
| |
| static bool addrrange_equal(AddrRange r1, AddrRange r2) |
| { |
| return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size); |
| } |
| |
| static Int128 addrrange_end(AddrRange r) |
| { |
| return int128_add(r.start, r.size); |
| } |
| |
| static AddrRange addrrange_shift(AddrRange range, Int128 delta) |
| { |
| int128_addto(&range.start, delta); |
| return range; |
| } |
| |
| static bool addrrange_contains(AddrRange range, Int128 addr) |
| { |
| return int128_ge(addr, range.start) |
| && int128_lt(addr, addrrange_end(range)); |
| } |
| |
| static bool addrrange_intersects(AddrRange r1, AddrRange r2) |
| { |
| return addrrange_contains(r1, r2.start) |
| || addrrange_contains(r2, r1.start); |
| } |
| |
| static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2) |
| { |
| Int128 start = int128_max(r1.start, r2.start); |
| Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2)); |
| return addrrange_make(start, int128_sub(end, start)); |
| } |
| |
| enum ListenerDirection { Forward, Reverse }; |
| |
| #define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \ |
| do { \ |
| MemoryListener *_listener; \ |
| \ |
| switch (_direction) { \ |
| case Forward: \ |
| QTAILQ_FOREACH(_listener, &memory_listeners, link) { \ |
| if (_listener->_callback) { \ |
| _listener->_callback(_listener, ##_args); \ |
| } \ |
| } \ |
| break; \ |
| case Reverse: \ |
| QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, link) { \ |
| if (_listener->_callback) { \ |
| _listener->_callback(_listener, ##_args); \ |
| } \ |
| } \ |
| break; \ |
| default: \ |
| abort(); \ |
| } \ |
| } while (0) |
| |
| #define MEMORY_LISTENER_CALL(_as, _callback, _direction, _section, _args...) \ |
| do { \ |
| MemoryListener *_listener; \ |
| \ |
| switch (_direction) { \ |
| case Forward: \ |
| QTAILQ_FOREACH(_listener, &(_as)->listeners, link_as) { \ |
| if (_listener->_callback) { \ |
| _listener->_callback(_listener, _section, ##_args); \ |
| } \ |
| } \ |
| break; \ |
| case Reverse: \ |
| QTAILQ_FOREACH_REVERSE(_listener, &(_as)->listeners, link_as) { \ |
| if (_listener->_callback) { \ |
| _listener->_callback(_listener, _section, ##_args); \ |
| } \ |
| } \ |
| break; \ |
| default: \ |
| abort(); \ |
| } \ |
| } while (0) |
| |
| /* No need to ref/unref .mr, the FlatRange keeps it alive. */ |
| #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback, _args...) \ |
| do { \ |
| MemoryRegionSection mrs = section_from_flat_range(fr, \ |
| address_space_to_flatview(as)); \ |
| MEMORY_LISTENER_CALL(as, callback, dir, &mrs, ##_args); \ |
| } while(0) |
| |
| struct CoalescedMemoryRange { |
| AddrRange addr; |
| QTAILQ_ENTRY(CoalescedMemoryRange) link; |
| }; |
| |
| struct MemoryRegionIoeventfd { |
| AddrRange addr; |
| bool match_data; |
| uint64_t data; |
| EventNotifier *e; |
| }; |
| |
| static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd *a, |
| MemoryRegionIoeventfd *b) |
| { |
| if (int128_lt(a->addr.start, b->addr.start)) { |
| return true; |
| } else if (int128_gt(a->addr.start, b->addr.start)) { |
| return false; |
| } else if (int128_lt(a->addr.size, b->addr.size)) { |
| return true; |
| } else if (int128_gt(a->addr.size, b->addr.size)) { |
| return false; |
| } else if (a->match_data < b->match_data) { |
| return true; |
| } else if (a->match_data > b->match_data) { |
| return false; |
| } else if (a->match_data) { |
| if (a->data < b->data) { |
| return true; |
| } else if (a->data > b->data) { |
| return false; |
| } |
| } |
| if (a->e < b->e) { |
| return true; |
| } else if (a->e > b->e) { |
| return false; |
| } |
| return false; |
| } |
| |
| static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd *a, |
| MemoryRegionIoeventfd *b) |
| { |
| return !memory_region_ioeventfd_before(a, b) |
| && !memory_region_ioeventfd_before(b, a); |
| } |
| |
| /* Range of memory in the global map. Addresses are absolute. */ |
| struct FlatRange { |
| MemoryRegion *mr; |
| hwaddr offset_in_region; |
| AddrRange addr; |
| uint8_t dirty_log_mask; |
| bool romd_mode; |
| bool readonly; |
| bool nonvolatile; |
| }; |
| |
| #define FOR_EACH_FLAT_RANGE(var, view) \ |
| for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var) |
| |
| static inline MemoryRegionSection |
| section_from_flat_range(FlatRange *fr, FlatView *fv) |
| { |
| return (MemoryRegionSection) { |
| .mr = fr->mr, |
| .fv = fv, |
| .offset_within_region = fr->offset_in_region, |
| .size = fr->addr.size, |
| .offset_within_address_space = int128_get64(fr->addr.start), |
| .readonly = fr->readonly, |
| .nonvolatile = fr->nonvolatile, |
| }; |
| } |
| |
| static bool flatrange_equal(FlatRange *a, FlatRange *b) |
| { |
| return a->mr == b->mr |
| && addrrange_equal(a->addr, b->addr) |
| && a->offset_in_region == b->offset_in_region |
| && a->romd_mode == b->romd_mode |
| && a->readonly == b->readonly |
| && a->nonvolatile == b->nonvolatile; |
| } |
| |
| static FlatView *flatview_new(MemoryRegion *mr_root) |
| { |
| FlatView *view; |
| |
| view = g_new0(FlatView, 1); |
| view->ref = 1; |
| view->root = mr_root; |
| memory_region_ref(mr_root); |
| trace_flatview_new(view, mr_root); |
| |
| return view; |
| } |
| |
| /* Insert a range into a given position. Caller is responsible for maintaining |
| * sorting order. |
| */ |
| static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range) |
| { |
| if (view->nr == view->nr_allocated) { |
| view->nr_allocated = MAX(2 * view->nr, 10); |
| view->ranges = g_realloc(view->ranges, |
| view->nr_allocated * sizeof(*view->ranges)); |
| } |
| memmove(view->ranges + pos + 1, view->ranges + pos, |
| (view->nr - pos) * sizeof(FlatRange)); |
| view->ranges[pos] = *range; |
| memory_region_ref(range->mr); |
| ++view->nr; |
| } |
| |
| static void flatview_destroy(FlatView *view) |
| { |
| int i; |
| |
| trace_flatview_destroy(view, view->root); |
| if (view->dispatch) { |
| address_space_dispatch_free(view->dispatch); |
| } |
| for (i = 0; i < view->nr; i++) { |
| memory_region_unref(view->ranges[i].mr); |
| } |
| g_free(view->ranges); |
| memory_region_unref(view->root); |
| g_free(view); |
| } |
| |
| static bool flatview_ref(FlatView *view) |
| { |
| return atomic_fetch_inc_nonzero(&view->ref) > 0; |
| } |
| |
| void flatview_unref(FlatView *view) |
| { |
| if (atomic_fetch_dec(&view->ref) == 1) { |
| trace_flatview_destroy_rcu(view, view->root); |
| assert(view->root); |
| call_rcu(view, flatview_destroy, rcu); |
| } |
| } |
| |
| static bool can_merge(FlatRange *r1, FlatRange *r2) |
| { |
| return int128_eq(addrrange_end(r1->addr), r2->addr.start) |
| && r1->mr == r2->mr |
| && int128_eq(int128_add(int128_make64(r1->offset_in_region), |
| r1->addr.size), |
| int128_make64(r2->offset_in_region)) |
| && r1->dirty_log_mask == r2->dirty_log_mask |
| && r1->romd_mode == r2->romd_mode |
| && r1->readonly == r2->readonly |
| && r1->nonvolatile == r2->nonvolatile; |
| } |
| |
| /* Attempt to simplify a view by merging adjacent ranges */ |
| static void flatview_simplify(FlatView *view) |
| { |
| unsigned i, j, k; |
| |
| i = 0; |
| while (i < view->nr) { |
| j = i + 1; |
| while (j < view->nr |
| && can_merge(&view->ranges[j-1], &view->ranges[j])) { |
| int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size); |
| ++j; |
| } |
| ++i; |
| for (k = i; k < j; k++) { |
| memory_region_unref(view->ranges[k].mr); |
| } |
| memmove(&view->ranges[i], &view->ranges[j], |
| (view->nr - j) * sizeof(view->ranges[j])); |
| view->nr -= j - i; |
| } |
| } |
| |
| static bool memory_region_big_endian(MemoryRegion *mr) |
| { |
| #ifdef TARGET_WORDS_BIGENDIAN |
| return mr->ops->endianness != DEVICE_LITTLE_ENDIAN; |
| #else |
| return mr->ops->endianness == DEVICE_BIG_ENDIAN; |
| #endif |
| } |
| |
| static void adjust_endianness(MemoryRegion *mr, uint64_t *data, MemOp op) |
| { |
| if ((op & MO_BSWAP) != devend_memop(mr->ops->endianness)) { |
| switch (op & MO_SIZE) { |
| case MO_8: |
| break; |
| case MO_16: |
| *data = bswap16(*data); |
| break; |
| case MO_32: |
| *data = bswap32(*data); |
| break; |
| case MO_64: |
| *data = bswap64(*data); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| } |
| |
| static inline void memory_region_shift_read_access(uint64_t *value, |
| signed shift, |
| uint64_t mask, |
| uint64_t tmp) |
| { |
| if (shift >= 0) { |
| *value |= (tmp & mask) << shift; |
| } else { |
| *value |= (tmp & mask) >> -shift; |
| } |
| } |
| |
| static inline uint64_t memory_region_shift_write_access(uint64_t *value, |
| signed shift, |
| uint64_t mask) |
| { |
| uint64_t tmp; |
| |
| if (shift >= 0) { |
| tmp = (*value >> shift) & mask; |
| } else { |
| tmp = (*value << -shift) & mask; |
| } |
| |
| return tmp; |
| } |
| |
| static hwaddr memory_region_to_absolute_addr(MemoryRegion *mr, hwaddr offset) |
| { |
| MemoryRegion *root; |
| hwaddr abs_addr = offset; |
| |
| abs_addr += mr->addr; |
| for (root = mr; root->container; ) { |
| root = root->container; |
| abs_addr += root->addr; |
| } |
| |
| return abs_addr; |
| } |
| |
| static int get_cpu_index(void) |
| { |
| if (current_cpu) { |
| return current_cpu->cpu_index; |
| } |
| return -1; |
| } |
| |
| static MemTxResult memory_region_read_accessor(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| signed shift, |
| uint64_t mask, |
| MemTxAttrs attrs) |
| { |
| uint64_t tmp; |
| |
| tmp = mr->ops->read(mr->opaque, addr, size); |
| if (mr->subpage) { |
| trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size); |
| } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_READ)) { |
| hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr); |
| trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size); |
| } |
| memory_region_shift_read_access(value, shift, mask, tmp); |
| return MEMTX_OK; |
| } |
| |
| static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| signed shift, |
| uint64_t mask, |
| MemTxAttrs attrs) |
| { |
| uint64_t tmp = 0; |
| MemTxResult r; |
| |
| r = mr->ops->read_with_attrs(mr->opaque, addr, &tmp, size, attrs); |
| if (mr->subpage) { |
| trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size); |
| } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_READ)) { |
| hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr); |
| trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size); |
| } |
| memory_region_shift_read_access(value, shift, mask, tmp); |
| return r; |
| } |
| |
| static MemTxResult memory_region_write_accessor(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| signed shift, |
| uint64_t mask, |
| MemTxAttrs attrs) |
| { |
| uint64_t tmp = memory_region_shift_write_access(value, shift, mask); |
| |
| if (mr->subpage) { |
| trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size); |
| } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_WRITE)) { |
| hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr); |
| trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size); |
| } |
| mr->ops->write(mr->opaque, addr, tmp, size); |
| return MEMTX_OK; |
| } |
| |
| static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| signed shift, |
| uint64_t mask, |
| MemTxAttrs attrs) |
| { |
| uint64_t tmp = memory_region_shift_write_access(value, shift, mask); |
| |
| if (mr->subpage) { |
| trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size); |
| } else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_WRITE)) { |
| hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr); |
| trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size); |
| } |
| return mr->ops->write_with_attrs(mr->opaque, addr, tmp, size, attrs); |
| } |
| |
| static MemTxResult access_with_adjusted_size(hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned access_size_min, |
| unsigned access_size_max, |
| MemTxResult (*access_fn) |
| (MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| signed shift, |
| uint64_t mask, |
| MemTxAttrs attrs), |
| MemoryRegion *mr, |
| MemTxAttrs attrs) |
| { |
| uint64_t access_mask; |
| unsigned access_size; |
| unsigned i; |
| MemTxResult r = MEMTX_OK; |
| |
| if (!access_size_min) { |
| access_size_min = 1; |
| } |
| if (!access_size_max) { |
| access_size_max = 4; |
| } |
| |
| /* FIXME: support unaligned access? */ |
| access_size = MAX(MIN(size, access_size_max), access_size_min); |
| access_mask = MAKE_64BIT_MASK(0, access_size * 8); |
| if (memory_region_big_endian(mr)) { |
| for (i = 0; i < size; i += access_size) { |
| r |= access_fn(mr, addr + i, value, access_size, |
| (size - access_size - i) * 8, access_mask, attrs); |
| } |
| } else { |
| for (i = 0; i < size; i += access_size) { |
| r |= access_fn(mr, addr + i, value, access_size, i * 8, |
| access_mask, attrs); |
| } |
| } |
| return r; |
| } |
| |
| static AddressSpace *memory_region_to_address_space(MemoryRegion *mr) |
| { |
| AddressSpace *as; |
| |
| while (mr->container) { |
| mr = mr->container; |
| } |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| if (mr == as->root) { |
| return as; |
| } |
| } |
| return NULL; |
| } |
| |
| /* Render a memory region into the global view. Ranges in @view obscure |
| * ranges in @mr. |
| */ |
| static void render_memory_region(FlatView *view, |
| MemoryRegion *mr, |
| Int128 base, |
| AddrRange clip, |
| bool readonly, |
| bool nonvolatile) |
| { |
| MemoryRegion *subregion; |
| unsigned i; |
| hwaddr offset_in_region; |
| Int128 remain; |
| Int128 now; |
| FlatRange fr; |
| AddrRange tmp; |
| |
| if (!mr->enabled) { |
| return; |
| } |
| |
| int128_addto(&base, int128_make64(mr->addr)); |
| readonly |= mr->readonly; |
| nonvolatile |= mr->nonvolatile; |
| |
| tmp = addrrange_make(base, mr->size); |
| |
| if (!addrrange_intersects(tmp, clip)) { |
| return; |
| } |
| |
| clip = addrrange_intersection(tmp, clip); |
| |
| if (mr->alias) { |
| int128_subfrom(&base, int128_make64(mr->alias->addr)); |
| int128_subfrom(&base, int128_make64(mr->alias_offset)); |
| render_memory_region(view, mr->alias, base, clip, |
| readonly, nonvolatile); |
| return; |
| } |
| |
| /* Render subregions in priority order. */ |
| QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) { |
| render_memory_region(view, subregion, base, clip, |
| readonly, nonvolatile); |
| } |
| |
| if (!mr->terminates) { |
| return; |
| } |
| |
| offset_in_region = int128_get64(int128_sub(clip.start, base)); |
| base = clip.start; |
| remain = clip.size; |
| |
| fr.mr = mr; |
| fr.dirty_log_mask = memory_region_get_dirty_log_mask(mr); |
| fr.romd_mode = mr->romd_mode; |
| fr.readonly = readonly; |
| fr.nonvolatile = nonvolatile; |
| |
| /* Render the region itself into any gaps left by the current view. */ |
| for (i = 0; i < view->nr && int128_nz(remain); ++i) { |
| if (int128_ge(base, addrrange_end(view->ranges[i].addr))) { |
| continue; |
| } |
| if (int128_lt(base, view->ranges[i].addr.start)) { |
| now = int128_min(remain, |
| int128_sub(view->ranges[i].addr.start, base)); |
| fr.offset_in_region = offset_in_region; |
| fr.addr = addrrange_make(base, now); |
| flatview_insert(view, i, &fr); |
| ++i; |
| int128_addto(&base, now); |
| offset_in_region += int128_get64(now); |
| int128_subfrom(&remain, now); |
| } |
| now = int128_sub(int128_min(int128_add(base, remain), |
| addrrange_end(view->ranges[i].addr)), |
| base); |
| int128_addto(&base, now); |
| offset_in_region += int128_get64(now); |
| int128_subfrom(&remain, now); |
| } |
| if (int128_nz(remain)) { |
| fr.offset_in_region = offset_in_region; |
| fr.addr = addrrange_make(base, remain); |
| flatview_insert(view, i, &fr); |
| } |
| } |
| |
| static MemoryRegion *memory_region_get_flatview_root(MemoryRegion *mr) |
| { |
| while (mr->enabled) { |
| if (mr->alias) { |
| if (!mr->alias_offset && int128_ge(mr->size, mr->alias->size)) { |
| /* The alias is included in its entirety. Use it as |
| * the "real" root, so that we can share more FlatViews. |
| */ |
| mr = mr->alias; |
| continue; |
| } |
| } else if (!mr->terminates) { |
| unsigned int found = 0; |
| MemoryRegion *child, *next = NULL; |
| QTAILQ_FOREACH(child, &mr->subregions, subregions_link) { |
| if (child->enabled) { |
| if (++found > 1) { |
| next = NULL; |
| break; |
| } |
| if (!child->addr && int128_ge(mr->size, child->size)) { |
| /* A child is included in its entirety. If it's the only |
| * enabled one, use it in the hope of finding an alias down the |
| * way. This will also let us share FlatViews. |
| */ |
| next = child; |
| } |
| } |
| } |
| if (found == 0) { |
| return NULL; |
| } |
| if (next) { |
| mr = next; |
| continue; |
| } |
| } |
| |
| return mr; |
| } |
| |
| return NULL; |
| } |
| |
| /* Render a memory topology into a list of disjoint absolute ranges. */ |
| static FlatView *generate_memory_topology(MemoryRegion *mr) |
| { |
| int i; |
| FlatView *view; |
| |
| view = flatview_new(mr); |
| |
| if (mr) { |
| render_memory_region(view, mr, int128_zero(), |
| addrrange_make(int128_zero(), int128_2_64()), |
| false, false); |
| } |
| flatview_simplify(view); |
| |
| view->dispatch = address_space_dispatch_new(view); |
| for (i = 0; i < view->nr; i++) { |
| MemoryRegionSection mrs = |
| section_from_flat_range(&view->ranges[i], view); |
| flatview_add_to_dispatch(view, &mrs); |
| } |
| address_space_dispatch_compact(view->dispatch); |
| g_hash_table_replace(flat_views, mr, view); |
| |
| return view; |
| } |
| |
| static void address_space_add_del_ioeventfds(AddressSpace *as, |
| MemoryRegionIoeventfd *fds_new, |
| unsigned fds_new_nb, |
| MemoryRegionIoeventfd *fds_old, |
| unsigned fds_old_nb) |
| { |
| unsigned iold, inew; |
| MemoryRegionIoeventfd *fd; |
| MemoryRegionSection section; |
| |
| /* Generate a symmetric difference of the old and new fd sets, adding |
| * and deleting as necessary. |
| */ |
| |
| iold = inew = 0; |
| while (iold < fds_old_nb || inew < fds_new_nb) { |
| if (iold < fds_old_nb |
| && (inew == fds_new_nb |
| || memory_region_ioeventfd_before(&fds_old[iold], |
| &fds_new[inew]))) { |
| fd = &fds_old[iold]; |
| section = (MemoryRegionSection) { |
| .fv = address_space_to_flatview(as), |
| .offset_within_address_space = int128_get64(fd->addr.start), |
| .size = fd->addr.size, |
| }; |
| MEMORY_LISTENER_CALL(as, eventfd_del, Forward, §ion, |
| fd->match_data, fd->data, fd->e); |
| ++iold; |
| } else if (inew < fds_new_nb |
| && (iold == fds_old_nb |
| || memory_region_ioeventfd_before(&fds_new[inew], |
| &fds_old[iold]))) { |
| fd = &fds_new[inew]; |
| section = (MemoryRegionSection) { |
| .fv = address_space_to_flatview(as), |
| .offset_within_address_space = int128_get64(fd->addr.start), |
| .size = fd->addr.size, |
| }; |
| MEMORY_LISTENER_CALL(as, eventfd_add, Reverse, §ion, |
| fd->match_data, fd->data, fd->e); |
| ++inew; |
| } else { |
| ++iold; |
| ++inew; |
| } |
| } |
| } |
| |
| FlatView *address_space_get_flatview(AddressSpace *as) |
| { |
| FlatView *view; |
| |
| RCU_READ_LOCK_GUARD(); |
| do { |
| view = address_space_to_flatview(as); |
| /* If somebody has replaced as->current_map concurrently, |
| * flatview_ref returns false. |
| */ |
| } while (!flatview_ref(view)); |
| return view; |
| } |
| |
| static void address_space_update_ioeventfds(AddressSpace *as) |
| { |
| FlatView *view; |
| FlatRange *fr; |
| unsigned ioeventfd_nb = 0; |
| unsigned ioeventfd_max; |
| MemoryRegionIoeventfd *ioeventfds; |
| AddrRange tmp; |
| unsigned i; |
| |
| /* |
| * It is likely that the number of ioeventfds hasn't changed much, so use |
| * the previous size as the starting value, with some headroom to avoid |
| * gratuitous reallocations. |
| */ |
| ioeventfd_max = QEMU_ALIGN_UP(as->ioeventfd_nb, 4); |
| ioeventfds = g_new(MemoryRegionIoeventfd, ioeventfd_max); |
| |
| view = address_space_get_flatview(as); |
| FOR_EACH_FLAT_RANGE(fr, view) { |
| for (i = 0; i < fr->mr->ioeventfd_nb; ++i) { |
| tmp = addrrange_shift(fr->mr->ioeventfds[i].addr, |
| int128_sub(fr->addr.start, |
| int128_make64(fr->offset_in_region))); |
| if (addrrange_intersects(fr->addr, tmp)) { |
| ++ioeventfd_nb; |
| if (ioeventfd_nb > ioeventfd_max) { |
| ioeventfd_max = MAX(ioeventfd_max * 2, 4); |
| ioeventfds = g_realloc(ioeventfds, |
| ioeventfd_max * sizeof(*ioeventfds)); |
| } |
| ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i]; |
| ioeventfds[ioeventfd_nb-1].addr = tmp; |
| } |
| } |
| } |
| |
| address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb, |
| as->ioeventfds, as->ioeventfd_nb); |
| |
| g_free(as->ioeventfds); |
| as->ioeventfds = ioeventfds; |
| as->ioeventfd_nb = ioeventfd_nb; |
| flatview_unref(view); |
| } |
| |
| /* |
| * Notify the memory listeners about the coalesced IO change events of |
| * range `cmr'. Only the part that has intersection of the specified |
| * FlatRange will be sent. |
| */ |
| static void flat_range_coalesced_io_notify(FlatRange *fr, AddressSpace *as, |
| CoalescedMemoryRange *cmr, bool add) |
| { |
| AddrRange tmp; |
| |
| tmp = addrrange_shift(cmr->addr, |
| int128_sub(fr->addr.start, |
| int128_make64(fr->offset_in_region))); |
| if (!addrrange_intersects(tmp, fr->addr)) { |
| return; |
| } |
| tmp = addrrange_intersection(tmp, fr->addr); |
| |
| if (add) { |
| MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, coalesced_io_add, |
| int128_get64(tmp.start), |
| int128_get64(tmp.size)); |
| } else { |
| MEMORY_LISTENER_UPDATE_REGION(fr, as, Reverse, coalesced_io_del, |
| int128_get64(tmp.start), |
| int128_get64(tmp.size)); |
| } |
| } |
| |
| static void flat_range_coalesced_io_del(FlatRange *fr, AddressSpace *as) |
| { |
| CoalescedMemoryRange *cmr; |
| |
| QTAILQ_FOREACH(cmr, &fr->mr->coalesced, link) { |
| flat_range_coalesced_io_notify(fr, as, cmr, false); |
| } |
| } |
| |
| static void flat_range_coalesced_io_add(FlatRange *fr, AddressSpace *as) |
| { |
| MemoryRegion *mr = fr->mr; |
| CoalescedMemoryRange *cmr; |
| |
| if (QTAILQ_EMPTY(&mr->coalesced)) { |
| return; |
| } |
| |
| QTAILQ_FOREACH(cmr, &mr->coalesced, link) { |
| flat_range_coalesced_io_notify(fr, as, cmr, true); |
| } |
| } |
| |
| static void address_space_update_topology_pass(AddressSpace *as, |
| const FlatView *old_view, |
| const FlatView *new_view, |
| bool adding) |
| { |
| unsigned iold, inew; |
| FlatRange *frold, *frnew; |
| |
| /* Generate a symmetric difference of the old and new memory maps. |
| * Kill ranges in the old map, and instantiate ranges in the new map. |
| */ |
| iold = inew = 0; |
| while (iold < old_view->nr || inew < new_view->nr) { |
| if (iold < old_view->nr) { |
| frold = &old_view->ranges[iold]; |
| } else { |
| frold = NULL; |
| } |
| if (inew < new_view->nr) { |
| frnew = &new_view->ranges[inew]; |
| } else { |
| frnew = NULL; |
| } |
| |
| if (frold |
| && (!frnew |
| || int128_lt(frold->addr.start, frnew->addr.start) |
| || (int128_eq(frold->addr.start, frnew->addr.start) |
| && !flatrange_equal(frold, frnew)))) { |
| /* In old but not in new, or in both but attributes changed. */ |
| |
| if (!adding) { |
| flat_range_coalesced_io_del(frold, as); |
| MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del); |
| } |
| |
| ++iold; |
| } else if (frold && frnew && flatrange_equal(frold, frnew)) { |
| /* In both and unchanged (except logging may have changed) */ |
| |
| if (adding) { |
| MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop); |
| if (frnew->dirty_log_mask & ~frold->dirty_log_mask) { |
| MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start, |
| frold->dirty_log_mask, |
| frnew->dirty_log_mask); |
| } |
| if (frold->dirty_log_mask & ~frnew->dirty_log_mask) { |
| MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop, |
| frold->dirty_log_mask, |
| frnew->dirty_log_mask); |
| } |
| } |
| |
| ++iold; |
| ++inew; |
| } else { |
| /* In new */ |
| |
| if (adding) { |
| MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add); |
| flat_range_coalesced_io_add(frnew, as); |
| } |
| |
| ++inew; |
| } |
| } |
| } |
| |
| static void flatviews_init(void) |
| { |
| static FlatView *empty_view; |
| |
| if (flat_views) { |
| return; |
| } |
| |
| flat_views = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, |
| (GDestroyNotify) flatview_unref); |
| if (!empty_view) { |
| empty_view = generate_memory_topology(NULL); |
| /* We keep it alive forever in the global variable. */ |
| flatview_ref(empty_view); |
| } else { |
| g_hash_table_replace(flat_views, NULL, empty_view); |
| flatview_ref(empty_view); |
| } |
| } |
| |
| static void flatviews_reset(void) |
| { |
| AddressSpace *as; |
| |
| if (flat_views) { |
| g_hash_table_unref(flat_views); |
| flat_views = NULL; |
| } |
| flatviews_init(); |
| |
| /* Render unique FVs */ |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| MemoryRegion *physmr = memory_region_get_flatview_root(as->root); |
| |
| if (g_hash_table_lookup(flat_views, physmr)) { |
| continue; |
| } |
| |
| generate_memory_topology(physmr); |
| } |
| } |
| |
| static void address_space_set_flatview(AddressSpace *as) |
| { |
| FlatView *old_view = address_space_to_flatview(as); |
| MemoryRegion *physmr = memory_region_get_flatview_root(as->root); |
| FlatView *new_view = g_hash_table_lookup(flat_views, physmr); |
| |
| assert(new_view); |
| |
| if (old_view == new_view) { |
| return; |
| } |
| |
| if (old_view) { |
| flatview_ref(old_view); |
| } |
| |
| flatview_ref(new_view); |
| |
| if (!QTAILQ_EMPTY(&as->listeners)) { |
| FlatView tmpview = { .nr = 0 }, *old_view2 = old_view; |
| |
| if (!old_view2) { |
| old_view2 = &tmpview; |
| } |
| address_space_update_topology_pass(as, old_view2, new_view, false); |
| address_space_update_topology_pass(as, old_view2, new_view, true); |
| } |
| |
| /* Writes are protected by the BQL. */ |
| atomic_rcu_set(&as->current_map, new_view); |
| if (old_view) { |
| flatview_unref(old_view); |
| } |
| |
| /* Note that all the old MemoryRegions are still alive up to this |
| * point. This relieves most MemoryListeners from the need to |
| * ref/unref the MemoryRegions they get---unless they use them |
| * outside the iothread mutex, in which case precise reference |
| * counting is necessary. |
| */ |
| if (old_view) { |
| flatview_unref(old_view); |
| } |
| } |
| |
| static void address_space_update_topology(AddressSpace *as) |
| { |
| MemoryRegion *physmr = memory_region_get_flatview_root(as->root); |
| |
| flatviews_init(); |
| if (!g_hash_table_lookup(flat_views, physmr)) { |
| generate_memory_topology(physmr); |
| } |
| address_space_set_flatview(as); |
| } |
| |
| void memory_region_transaction_begin(void) |
| { |
| qemu_flush_coalesced_mmio_buffer(); |
| ++memory_region_transaction_depth; |
| } |
| |
| void memory_region_transaction_commit(void) |
| { |
| AddressSpace *as; |
| |
| assert(memory_region_transaction_depth); |
| assert(qemu_mutex_iothread_locked()); |
| |
| --memory_region_transaction_depth; |
| if (!memory_region_transaction_depth) { |
| if (memory_region_update_pending) { |
| flatviews_reset(); |
| |
| MEMORY_LISTENER_CALL_GLOBAL(begin, Forward); |
| |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| address_space_set_flatview(as); |
| address_space_update_ioeventfds(as); |
| } |
| memory_region_update_pending = false; |
| ioeventfd_update_pending = false; |
| MEMORY_LISTENER_CALL_GLOBAL(commit, Forward); |
| } else if (ioeventfd_update_pending) { |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| address_space_update_ioeventfds(as); |
| } |
| ioeventfd_update_pending = false; |
| } |
| } |
| } |
| |
| static void memory_region_destructor_none(MemoryRegion *mr) |
| { |
| } |
| |
| static void memory_region_destructor_ram(MemoryRegion *mr) |
| { |
| qemu_ram_free(mr->ram_block); |
| } |
| |
| static bool memory_region_need_escape(char c) |
| { |
| return c == '/' || c == '[' || c == '\\' || c == ']'; |
| } |
| |
| static char *memory_region_escape_name(const char *name) |
| { |
| const char *p; |
| char *escaped, *q; |
| uint8_t c; |
| size_t bytes = 0; |
| |
| for (p = name; *p; p++) { |
| bytes += memory_region_need_escape(*p) ? 4 : 1; |
| } |
| if (bytes == p - name) { |
| return g_memdup(name, bytes + 1); |
| } |
| |
| escaped = g_malloc(bytes + 1); |
| for (p = name, q = escaped; *p; p++) { |
| c = *p; |
| if (unlikely(memory_region_need_escape(c))) { |
| *q++ = '\\'; |
| *q++ = 'x'; |
| *q++ = "0123456789abcdef"[c >> 4]; |
| c = "0123456789abcdef"[c & 15]; |
| } |
| *q++ = c; |
| } |
| *q = 0; |
| return escaped; |
| } |
| |
| static void memory_region_do_init(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size) |
| { |
| mr->size = int128_make64(size); |
| if (size == UINT64_MAX) { |
| mr->size = int128_2_64(); |
| } |
| mr->name = g_strdup(name); |
| mr->owner = owner; |
| mr->ram_block = NULL; |
| |
| if (name) { |
| char *escaped_name = memory_region_escape_name(name); |
| char *name_array = g_strdup_printf("%s[*]", escaped_name); |
| |
| if (!owner) { |
| owner = container_get(qdev_get_machine(), "/unattached"); |
| } |
| |
| object_property_add_child(owner, name_array, OBJECT(mr), &error_abort); |
| object_unref(OBJECT(mr)); |
| g_free(name_array); |
| g_free(escaped_name); |
| } |
| } |
| |
| void memory_region_init(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size) |
| { |
| object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION); |
| memory_region_do_init(mr, owner, name, size); |
| } |
| |
| static void memory_region_get_container(Object *obj, Visitor *v, |
| const char *name, void *opaque, |
| Error **errp) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| gchar *path = (gchar *)""; |
| |
| if (mr->container) { |
| path = object_get_canonical_path(OBJECT(mr->container)); |
| } |
| visit_type_str(v, name, &path, errp); |
| if (mr->container) { |
| g_free(path); |
| } |
| } |
| |
| static Object *memory_region_resolve_container(Object *obj, void *opaque, |
| const char *part) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| |
| return OBJECT(mr->container); |
| } |
| |
| static void memory_region_get_priority(Object *obj, Visitor *v, |
| const char *name, void *opaque, |
| Error **errp) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| int32_t value = mr->priority; |
| |
| visit_type_int32(v, name, &value, errp); |
| } |
| |
| static void memory_region_get_size(Object *obj, Visitor *v, const char *name, |
| void *opaque, Error **errp) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| uint64_t value = memory_region_size(mr); |
| |
| visit_type_uint64(v, name, &value, errp); |
| } |
| |
| static void memory_region_initfn(Object *obj) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| ObjectProperty *op; |
| |
| mr->ops = &unassigned_mem_ops; |
| mr->enabled = true; |
| mr->romd_mode = true; |
| mr->global_locking = true; |
| mr->destructor = memory_region_destructor_none; |
| QTAILQ_INIT(&mr->subregions); |
| QTAILQ_INIT(&mr->coalesced); |
| |
| op = object_property_add(OBJECT(mr), "container", |
| "link<" TYPE_MEMORY_REGION ">", |
| memory_region_get_container, |
| NULL, /* memory_region_set_container */ |
| NULL, NULL, &error_abort); |
| op->resolve = memory_region_resolve_container; |
| |
| object_property_add_uint64_ptr(OBJECT(mr), "addr", |
| &mr->addr, OBJ_PROP_FLAG_READ, &error_abort); |
| object_property_add(OBJECT(mr), "priority", "uint32", |
| memory_region_get_priority, |
| NULL, /* memory_region_set_priority */ |
| NULL, NULL, &error_abort); |
| object_property_add(OBJECT(mr), "size", "uint64", |
| memory_region_get_size, |
| NULL, /* memory_region_set_size, */ |
| NULL, NULL, &error_abort); |
| } |
| |
| static void iommu_memory_region_initfn(Object *obj) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| |
| mr->is_iommu = true; |
| } |
| |
| static uint64_t unassigned_mem_read(void *opaque, hwaddr addr, |
| unsigned size) |
| { |
| #ifdef DEBUG_UNASSIGNED |
| printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); |
| #endif |
| return 0; |
| } |
| |
| static void unassigned_mem_write(void *opaque, hwaddr addr, |
| uint64_t val, unsigned size) |
| { |
| #ifdef DEBUG_UNASSIGNED |
| printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val); |
| #endif |
| } |
| |
| static bool unassigned_mem_accepts(void *opaque, hwaddr addr, |
| unsigned size, bool is_write, |
| MemTxAttrs attrs) |
| { |
| return false; |
| } |
| |
| const MemoryRegionOps unassigned_mem_ops = { |
| .valid.accepts = unassigned_mem_accepts, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| static uint64_t memory_region_ram_device_read(void *opaque, |
| hwaddr addr, unsigned size) |
| { |
| MemoryRegion *mr = opaque; |
| uint64_t data = (uint64_t)~0; |
| |
| switch (size) { |
| case 1: |
| data = *(uint8_t *)(mr->ram_block->host + addr); |
| break; |
| case 2: |
| data = *(uint16_t *)(mr->ram_block->host + addr); |
| break; |
| case 4: |
| data = *(uint32_t *)(mr->ram_block->host + addr); |
| break; |
| case 8: |
| data = *(uint64_t *)(mr->ram_block->host + addr); |
| break; |
| } |
| |
| trace_memory_region_ram_device_read(get_cpu_index(), mr, addr, data, size); |
| |
| return data; |
| } |
| |
| static void memory_region_ram_device_write(void *opaque, hwaddr addr, |
| uint64_t data, unsigned size) |
| { |
| MemoryRegion *mr = opaque; |
| |
| trace_memory_region_ram_device_write(get_cpu_index(), mr, addr, data, size); |
| |
| switch (size) { |
| case 1: |
| *(uint8_t *)(mr->ram_block->host + addr) = (uint8_t)data; |
| break; |
| case 2: |
| *(uint16_t *)(mr->ram_block->host + addr) = (uint16_t)data; |
| break; |
| case 4: |
| *(uint32_t *)(mr->ram_block->host + addr) = (uint32_t)data; |
| break; |
| case 8: |
| *(uint64_t *)(mr->ram_block->host + addr) = data; |
| break; |
| } |
| } |
| |
| static const MemoryRegionOps ram_device_mem_ops = { |
| .read = memory_region_ram_device_read, |
| .write = memory_region_ram_device_write, |
| .endianness = DEVICE_HOST_ENDIAN, |
| .valid = { |
| .min_access_size = 1, |
| .max_access_size = 8, |
| .unaligned = true, |
| }, |
| .impl = { |
| .min_access_size = 1, |
| .max_access_size = 8, |
| .unaligned = true, |
| }, |
| }; |
| |
| bool memory_region_access_valid(MemoryRegion *mr, |
| hwaddr addr, |
| unsigned size, |
| bool is_write, |
| MemTxAttrs attrs) |
| { |
| int access_size_min, access_size_max; |
| int access_size, i; |
| |
| if (!mr->ops->valid.unaligned && (addr & (size - 1))) { |
| return false; |
| } |
| |
| if (!mr->ops->valid.accepts) { |
| return true; |
| } |
| |
| access_size_min = mr->ops->valid.min_access_size; |
| if (!mr->ops->valid.min_access_size) { |
| access_size_min = 1; |
| } |
| |
| access_size_max = mr->ops->valid.max_access_size; |
| if (!mr->ops->valid.max_access_size) { |
| access_size_max = 4; |
| } |
| |
| access_size = MAX(MIN(size, access_size_max), access_size_min); |
| for (i = 0; i < size; i += access_size) { |
| if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size, |
| is_write, attrs)) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *pval, |
| unsigned size, |
| MemTxAttrs attrs) |
| { |
| *pval = 0; |
| |
| if (mr->ops->read) { |
| return access_with_adjusted_size(addr, pval, size, |
| mr->ops->impl.min_access_size, |
| mr->ops->impl.max_access_size, |
| memory_region_read_accessor, |
| mr, attrs); |
| } else { |
| return access_with_adjusted_size(addr, pval, size, |
| mr->ops->impl.min_access_size, |
| mr->ops->impl.max_access_size, |
| memory_region_read_with_attrs_accessor, |
| mr, attrs); |
| } |
| } |
| |
| MemTxResult memory_region_dispatch_read(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *pval, |
| MemOp op, |
| MemTxAttrs attrs) |
| { |
| unsigned size = memop_size(op); |
| MemTxResult r; |
| |
| if (!memory_region_access_valid(mr, addr, size, false, attrs)) { |
| *pval = unassigned_mem_read(mr, addr, size); |
| return MEMTX_DECODE_ERROR; |
| } |
| |
| r = memory_region_dispatch_read1(mr, addr, pval, size, attrs); |
| adjust_endianness(mr, pval, op); |
| return r; |
| } |
| |
| /* Return true if an eventfd was signalled */ |
| static bool memory_region_dispatch_write_eventfds(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t data, |
| unsigned size, |
| MemTxAttrs attrs) |
| { |
| MemoryRegionIoeventfd ioeventfd = { |
| .addr = addrrange_make(int128_make64(addr), int128_make64(size)), |
| .data = data, |
| }; |
| unsigned i; |
| |
| for (i = 0; i < mr->ioeventfd_nb; i++) { |
| ioeventfd.match_data = mr->ioeventfds[i].match_data; |
| ioeventfd.e = mr->ioeventfds[i].e; |
| |
| if (memory_region_ioeventfd_equal(&ioeventfd, &mr->ioeventfds[i])) { |
| event_notifier_set(ioeventfd.e); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| MemTxResult memory_region_dispatch_write(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t data, |
| MemOp op, |
| MemTxAttrs attrs) |
| { |
| unsigned size = memop_size(op); |
| |
| if (!memory_region_access_valid(mr, addr, size, true, attrs)) { |
| unassigned_mem_write(mr, addr, data, size); |
| return MEMTX_DECODE_ERROR; |
| } |
| |
| adjust_endianness(mr, &data, op); |
| |
| if ((!kvm_eventfds_enabled()) && |
| memory_region_dispatch_write_eventfds(mr, addr, data, size, attrs)) { |
| return MEMTX_OK; |
| } |
| |
| if (mr->ops->write) { |
| return access_with_adjusted_size(addr, &data, size, |
| mr->ops->impl.min_access_size, |
| mr->ops->impl.max_access_size, |
| memory_region_write_accessor, mr, |
| attrs); |
| } else { |
| return |
| access_with_adjusted_size(addr, &data, size, |
| mr->ops->impl.min_access_size, |
| mr->ops->impl.max_access_size, |
| memory_region_write_with_attrs_accessor, |
| mr, attrs); |
| } |
| } |
| |
| void memory_region_init_io(MemoryRegion *mr, |
| Object *owner, |
| const MemoryRegionOps *ops, |
| void *opaque, |
| const char *name, |
| uint64_t size) |
| { |
| memory_region_init(mr, owner, name, size); |
| mr->ops = ops ? ops : &unassigned_mem_ops; |
| mr->opaque = opaque; |
| mr->terminates = true; |
| } |
| |
| void memory_region_init_ram_nomigrate(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size, |
| Error **errp) |
| { |
| memory_region_init_ram_shared_nomigrate(mr, owner, name, size, false, errp); |
| } |
| |
| void memory_region_init_ram_shared_nomigrate(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size, |
| bool share, |
| Error **errp) |
| { |
| Error *err = NULL; |
| memory_region_init(mr, owner, name, size); |
| mr->ram = true; |
| mr->terminates = true; |
| mr->destructor = memory_region_destructor_ram; |
| mr->ram_block = qemu_ram_alloc(size, share, mr, &err); |
| mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; |
| if (err) { |
| mr->size = int128_zero(); |
| object_unparent(OBJECT(mr)); |
| error_propagate(errp, err); |
| } |
| } |
| |
| void memory_region_init_resizeable_ram(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size, |
| uint64_t max_size, |
| void (*resized)(const char*, |
| uint64_t length, |
| void *host), |
| Error **errp) |
| { |
| Error *err = NULL; |
| memory_region_init(mr, owner, name, size); |
| mr->ram = true; |
| mr->terminates = true; |
| mr->destructor = memory_region_destructor_ram; |
| mr->ram_block = qemu_ram_alloc_resizeable(size, max_size, resized, |
| mr, &err); |
| mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; |
| if (err) { |
| mr->size = int128_zero(); |
| object_unparent(OBJECT(mr)); |
| error_propagate(errp, err); |
| } |
| } |
| |
| #ifdef CONFIG_POSIX |
| void memory_region_init_ram_from_file(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| uint64_t size, |
| uint64_t align, |
| uint32_t ram_flags, |
| const char *path, |
| Error **errp) |
| { |
| Error *err = NULL; |
| memory_region_init(mr, owner, name, size); |
| mr->ram = true; |
| mr->terminates = true; |
| mr->destructor = memory_region_destructor_ram; |
| mr->align = align; |
| mr->ram_block = qemu_ram_alloc_from_file(size, mr, ram_flags, path, &err); |
| mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; |
| if (err) { |
| mr->size = int128_zero(); |
| object_unparent(OBJECT(mr)); |
| error_propagate(errp, err); |
| } |
| } |
| |
| void memory_region_init_ram_from_fd(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| uint64_t size, |
| bool share, |
| int fd, |
| Error **errp) |
| { |
| Error *err = NULL; |
| memory_region_init(mr, owner, name, size); |
| mr->ram = true; |
| mr->terminates = true; |
| mr->destructor = memory_region_destructor_ram; |
| mr->ram_block = qemu_ram_alloc_from_fd(size, mr, |
| share ? RAM_SHARED : 0, |
| fd, &err); |
| mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; |
| if (err) { |
| mr->size = int128_zero(); |
| object_unparent(OBJECT(mr)); |
| error_propagate(errp, err); |
| } |
| } |
| #endif |
| |
| void memory_region_init_ram_ptr(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size, |
| void *ptr) |
| { |
| memory_region_init(mr, owner, name, size); |
| mr->ram = true; |
| mr->terminates = true; |
| mr->destructor = memory_region_destructor_ram; |
| mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; |
| |
| /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */ |
| assert(ptr != NULL); |
| mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal); |
| } |
| |
| void memory_region_init_ram_device_ptr(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size, |
| void *ptr) |
| { |
| memory_region_init(mr, owner, name, size); |
| mr->ram = true; |
| mr->terminates = true; |
| mr->ram_device = true; |
| mr->ops = &ram_device_mem_ops; |
| mr->opaque = mr; |
| mr->destructor = memory_region_destructor_ram; |
| mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; |
| /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */ |
| assert(ptr != NULL); |
| mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal); |
| } |
| |
| void memory_region_init_alias(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| MemoryRegion *orig, |
| hwaddr offset, |
| uint64_t size) |
| { |
| memory_region_init(mr, owner, name, size); |
| mr->alias = orig; |
| mr->alias_offset = offset; |
| } |
| |
| void memory_region_init_rom_nomigrate(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| uint64_t size, |
| Error **errp) |
| { |
| memory_region_init_ram_shared_nomigrate(mr, owner, name, size, false, errp); |
| mr->readonly = true; |
| } |
| |
| void memory_region_init_rom_device_nomigrate(MemoryRegion *mr, |
| Object *owner, |
| const MemoryRegionOps *ops, |
| void *opaque, |
| const char *name, |
| uint64_t size, |
| Error **errp) |
| { |
| Error *err = NULL; |
| assert(ops); |
| memory_region_init(mr, owner, name, size); |
| mr->ops = ops; |
| mr->opaque = opaque; |
| mr->terminates = true; |
| mr->rom_device = true; |
| mr->destructor = memory_region_destructor_ram; |
| mr->ram_block = qemu_ram_alloc(size, false, mr, &err); |
| if (err) { |
| mr->size = int128_zero(); |
| object_unparent(OBJECT(mr)); |
| error_propagate(errp, err); |
| } |
| } |
| |
| void memory_region_init_iommu(void *_iommu_mr, |
| size_t instance_size, |
| const char *mrtypename, |
| Object *owner, |
| const char *name, |
| uint64_t size) |
| { |
| struct IOMMUMemoryRegion *iommu_mr; |
| struct MemoryRegion *mr; |
| |
| object_initialize(_iommu_mr, instance_size, mrtypename); |
| mr = MEMORY_REGION(_iommu_mr); |
| memory_region_do_init(mr, owner, name, size); |
| iommu_mr = IOMMU_MEMORY_REGION(mr); |
| mr->terminates = true; /* then re-forwards */ |
| QLIST_INIT(&iommu_mr->iommu_notify); |
| iommu_mr->iommu_notify_flags = IOMMU_NOTIFIER_NONE; |
| } |
| |
| static void memory_region_finalize(Object *obj) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| |
| assert(!mr->container); |
| |
| /* We know the region is not visible in any address space (it |
| * does not have a container and cannot be a root either because |
| * it has no references, so we can blindly clear mr->enabled. |
| * memory_region_set_enabled instead could trigger a transaction |
| * and cause an infinite loop. |
| */ |
| mr->enabled = false; |
| memory_region_transaction_begin(); |
| while (!QTAILQ_EMPTY(&mr->subregions)) { |
| MemoryRegion *subregion = QTAILQ_FIRST(&mr->subregions); |
| memory_region_del_subregion(mr, subregion); |
| } |
| memory_region_transaction_commit(); |
| |
| mr->destructor(mr); |
| memory_region_clear_coalescing(mr); |
| g_free((char *)mr->name); |
| g_free(mr->ioeventfds); |
| } |
| |
| Object *memory_region_owner(MemoryRegion *mr) |
| { |
| Object *obj = OBJECT(mr); |
| return obj->parent; |
| } |
| |
| void memory_region_ref(MemoryRegion *mr) |
| { |
| /* MMIO callbacks most likely will access data that belongs |
| * to the owner, hence the need to ref/unref the owner whenever |
| * the memory region is in use. |
| * |
| * The memory region is a child of its owner. As long as the |
| * owner doesn't call unparent itself on the memory region, |
| * ref-ing the owner will also keep the memory region alive. |
| * Memory regions without an owner are supposed to never go away; |
| * we do not ref/unref them because it slows down DMA sensibly. |
| */ |
| if (mr && mr->owner) { |
| object_ref(mr->owner); |
| } |
| } |
| |
| void memory_region_unref(MemoryRegion *mr) |
| { |
| if (mr && mr->owner) { |
| object_unref(mr->owner); |
| } |
| } |
| |
| uint64_t memory_region_size(MemoryRegion *mr) |
| { |
| if (int128_eq(mr->size, int128_2_64())) { |
| return UINT64_MAX; |
| } |
| return int128_get64(mr->size); |
| } |
| |
| const char *memory_region_name(const MemoryRegion *mr) |
| { |
| if (!mr->name) { |
| ((MemoryRegion *)mr)->name = |
| object_get_canonical_path_component(OBJECT(mr)); |
| } |
| return mr->name; |
| } |
| |
| bool memory_region_is_ram_device(MemoryRegion *mr) |
| { |
| return mr->ram_device; |
| } |
| |
| uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr) |
| { |
| uint8_t mask = mr->dirty_log_mask; |
| if (global_dirty_log && mr->ram_block) { |
| mask |= (1 << DIRTY_MEMORY_MIGRATION); |
| } |
| return mask; |
| } |
| |
| bool memory_region_is_logging(MemoryRegion *mr, uint8_t client) |
| { |
| return memory_region_get_dirty_log_mask(mr) & (1 << client); |
| } |
| |
| static int memory_region_update_iommu_notify_flags(IOMMUMemoryRegion *iommu_mr, |
| Error **errp) |
| { |
| IOMMUNotifierFlag flags = IOMMU_NOTIFIER_NONE; |
| IOMMUNotifier *iommu_notifier; |
| IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); |
| int ret = 0; |
| |
| IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) { |
| flags |= iommu_notifier->notifier_flags; |
| } |
| |
| if (flags != iommu_mr->iommu_notify_flags && imrc->notify_flag_changed) { |
| ret = imrc->notify_flag_changed(iommu_mr, |
| iommu_mr->iommu_notify_flags, |
| flags, errp); |
| } |
| |
| if (!ret) { |
| iommu_mr->iommu_notify_flags = flags; |
| } |
| return ret; |
| } |
| |
| int memory_region_register_iommu_notifier(MemoryRegion *mr, |
| IOMMUNotifier *n, Error **errp) |
| { |
| IOMMUMemoryRegion *iommu_mr; |
| int ret; |
| |
| if (mr->alias) { |
| return memory_region_register_iommu_notifier(mr->alias, n, errp); |
| } |
| |
| /* We need to register for at least one bitfield */ |
| iommu_mr = IOMMU_MEMORY_REGION(mr); |
| assert(n->notifier_flags != IOMMU_NOTIFIER_NONE); |
| assert(n->start <= n->end); |
| assert(n->iommu_idx >= 0 && |
| n->iommu_idx < memory_region_iommu_num_indexes(iommu_mr)); |
| |
| QLIST_INSERT_HEAD(&iommu_mr->iommu_notify, n, node); |
| ret = memory_region_update_iommu_notify_flags(iommu_mr, errp); |
| if (ret) { |
| QLIST_REMOVE(n, node); |
| } |
| return ret; |
| } |
| |
| uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion *iommu_mr) |
| { |
| IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); |
| |
| if (imrc->get_min_page_size) { |
| return imrc->get_min_page_size(iommu_mr); |
| } |
| return TARGET_PAGE_SIZE; |
| } |
| |
| void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n) |
| { |
| MemoryRegion *mr = MEMORY_REGION(iommu_mr); |
| IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); |
| hwaddr addr, granularity; |
| IOMMUTLBEntry iotlb; |
| |
| /* If the IOMMU has its own replay callback, override */ |
| if (imrc->replay) { |
| imrc->replay(iommu_mr, n); |
| return; |
| } |
| |
| granularity = memory_region_iommu_get_min_page_size(iommu_mr); |
| |
| for (addr = 0; addr < memory_region_size(mr); addr += granularity) { |
| iotlb = imrc->translate(iommu_mr, addr, IOMMU_NONE, n->iommu_idx); |
| if (iotlb.perm != IOMMU_NONE) { |
| n->notify(n, &iotlb); |
| } |
| |
| /* if (2^64 - MR size) < granularity, it's possible to get an |
| * infinite loop here. This should catch such a wraparound */ |
| if ((addr + granularity) < addr) { |
| break; |
| } |
| } |
| } |
| |
| void memory_region_unregister_iommu_notifier(MemoryRegion *mr, |
| IOMMUNotifier *n) |
| { |
| IOMMUMemoryRegion *iommu_mr; |
| |
| if (mr->alias) { |
| memory_region_unregister_iommu_notifier(mr->alias, n); |
| return; |
| } |
| QLIST_REMOVE(n, node); |
| iommu_mr = IOMMU_MEMORY_REGION(mr); |
| memory_region_update_iommu_notify_flags(iommu_mr, NULL); |
| } |
| |
| void memory_region_notify_one(IOMMUNotifier *notifier, |
| IOMMUTLBEntry *entry) |
| { |
| IOMMUNotifierFlag request_flags; |
| hwaddr entry_end = entry->iova + entry->addr_mask; |
| |
| /* |
| * Skip the notification if the notification does not overlap |
| * with registered range. |
| */ |
| if (notifier->start > entry_end || notifier->end < entry->iova) { |
| return; |
| } |
| |
| assert(entry->iova >= notifier->start && entry_end <= notifier->end); |
| |
| if (entry->perm & IOMMU_RW) { |
| request_flags = IOMMU_NOTIFIER_MAP; |
| } else { |
| request_flags = IOMMU_NOTIFIER_UNMAP; |
| } |
| |
| if (notifier->notifier_flags & request_flags) { |
| notifier->notify(notifier, entry); |
| } |
| } |
| |
| void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr, |
| int iommu_idx, |
| IOMMUTLBEntry entry) |
| { |
| IOMMUNotifier *iommu_notifier; |
| |
| assert(memory_region_is_iommu(MEMORY_REGION(iommu_mr))); |
| |
| IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) { |
| if (iommu_notifier->iommu_idx == iommu_idx) { |
| memory_region_notify_one(iommu_notifier, &entry); |
| } |
| } |
| } |
| |
| int memory_region_iommu_get_attr(IOMMUMemoryRegion *iommu_mr, |
| enum IOMMUMemoryRegionAttr attr, |
| void *data) |
| { |
| IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); |
| |
| if (!imrc->get_attr) { |
| return -EINVAL; |
| } |
| |
| return imrc->get_attr(iommu_mr, attr, data); |
| } |
| |
| int memory_region_iommu_attrs_to_index(IOMMUMemoryRegion *iommu_mr, |
| MemTxAttrs attrs) |
| { |
| IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); |
| |
| if (!imrc->attrs_to_index) { |
| return 0; |
| } |
| |
| return imrc->attrs_to_index(iommu_mr, attrs); |
| } |
| |
| int memory_region_iommu_num_indexes(IOMMUMemoryRegion *iommu_mr) |
| { |
| IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); |
| |
| if (!imrc->num_indexes) { |
| return 1; |
| } |
| |
| return imrc->num_indexes(iommu_mr); |
| } |
| |
| void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client) |
| { |
| uint8_t mask = 1 << client; |
| uint8_t old_logging; |
| |
| assert(client == DIRTY_MEMORY_VGA); |
| old_logging = mr->vga_logging_count; |
| mr->vga_logging_count += log ? 1 : -1; |
| if (!!old_logging == !!mr->vga_logging_count) { |
| return; |
| } |
| |
| memory_region_transaction_begin(); |
| mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask); |
| memory_region_update_pending |= mr->enabled; |
| memory_region_transaction_commit(); |
| } |
| |
| void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr, |
| hwaddr size) |
| { |
| assert(mr->ram_block); |
| cpu_physical_memory_set_dirty_range(memory_region_get_ram_addr(mr) + addr, |
| size, |
| memory_region_get_dirty_log_mask(mr)); |
| } |
| |
| static void memory_region_sync_dirty_bitmap(MemoryRegion *mr) |
| { |
| MemoryListener *listener; |
| AddressSpace *as; |
| FlatView *view; |
| FlatRange *fr; |
| |
| /* If the same address space has multiple log_sync listeners, we |
| * visit that address space's FlatView multiple times. But because |
| * log_sync listeners are rare, it's still cheaper than walking each |
| * address space once. |
| */ |
| QTAILQ_FOREACH(listener, &memory_listeners, link) { |
| if (!listener->log_sync) { |
| continue; |
| } |
| as = listener->address_space; |
| view = address_space_get_flatview(as); |
| FOR_EACH_FLAT_RANGE(fr, view) { |
| if (fr->dirty_log_mask && (!mr || fr->mr == mr)) { |
| MemoryRegionSection mrs = section_from_flat_range(fr, view); |
| listener->log_sync(listener, &mrs); |
| } |
| } |
| flatview_unref(view); |
| } |
| } |
| |
| void memory_region_clear_dirty_bitmap(MemoryRegion *mr, hwaddr start, |
| hwaddr len) |
| { |
| MemoryRegionSection mrs; |
| MemoryListener *listener; |
| AddressSpace *as; |
| FlatView *view; |
| FlatRange *fr; |
| hwaddr sec_start, sec_end, sec_size; |
| |
| QTAILQ_FOREACH(listener, &memory_listeners, link) { |
| if (!listener->log_clear) { |
| continue; |
| } |
| as = listener->address_space; |
| view = address_space_get_flatview(as); |
| FOR_EACH_FLAT_RANGE(fr, view) { |
| if (!fr->dirty_log_mask || fr->mr != mr) { |
| /* |
| * Clear dirty bitmap operation only applies to those |
| * regions whose dirty logging is at least enabled |
| */ |
| continue; |
| } |
| |
| mrs = section_from_flat_range(fr, view); |
| |
| sec_start = MAX(mrs.offset_within_region, start); |
| sec_end = mrs.offset_within_region + int128_get64(mrs.size); |
| sec_end = MIN(sec_end, start + len); |
| |
| if (sec_start >= sec_end) { |
| /* |
| * If this memory region section has no intersection |
| * with the requested range, skip. |
| */ |
| continue; |
| } |
| |
| /* Valid case; shrink the section if needed */ |
| mrs.offset_within_address_space += |
| sec_start - mrs.offset_within_region; |
| mrs.offset_within_region = sec_start; |
| sec_size = sec_end - sec_start; |
| mrs.size = int128_make64(sec_size); |
| listener->log_clear(listener, &mrs); |
| } |
| flatview_unref(view); |
| } |
| } |
| |
| DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr, |
| hwaddr addr, |
| hwaddr size, |
| unsigned client) |
| { |
| DirtyBitmapSnapshot *snapshot; |
| assert(mr->ram_block); |
| memory_region_sync_dirty_bitmap(mr); |
| snapshot = cpu_physical_memory_snapshot_and_clear_dirty(mr, addr, size, client); |
| memory_global_after_dirty_log_sync(); |
| return snapshot; |
| } |
| |
| bool memory_region_snapshot_get_dirty(MemoryRegion *mr, DirtyBitmapSnapshot *snap, |
| hwaddr addr, hwaddr size) |
| { |
| assert(mr->ram_block); |
| return cpu_physical_memory_snapshot_get_dirty(snap, |
| memory_region_get_ram_addr(mr) + addr, size); |
| } |
| |
| void memory_region_set_readonly(MemoryRegion *mr, bool readonly) |
| { |
| if (mr->readonly != readonly) { |
| memory_region_transaction_begin(); |
| mr->readonly = readonly; |
| memory_region_update_pending |= mr->enabled; |
| memory_region_transaction_commit(); |
| } |
| } |
| |
| void memory_region_set_nonvolatile(MemoryRegion *mr, bool nonvolatile) |
| { |
| if (mr->nonvolatile != nonvolatile) { |
| memory_region_transaction_begin(); |
| mr->nonvolatile = nonvolatile; |
| memory_region_update_pending |= mr->enabled; |
| memory_region_transaction_commit(); |
| } |
| } |
| |
| void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode) |
| { |
| if (mr->romd_mode != romd_mode) { |
| memory_region_transaction_begin(); |
| mr->romd_mode = romd_mode; |
| memory_region_update_pending |= mr->enabled; |
| memory_region_transaction_commit(); |
| } |
| } |
| |
| void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr, |
| hwaddr size, unsigned client) |
| { |
| assert(mr->ram_block); |
| cpu_physical_memory_test_and_clear_dirty( |
| memory_region_get_ram_addr(mr) + addr, size, client); |
| } |
| |
| int memory_region_get_fd(MemoryRegion *mr) |
| { |
| int fd; |
| |
| RCU_READ_LOCK_GUARD(); |
| while (mr->alias) { |
| mr = mr->alias; |
| } |
| fd = mr->ram_block->fd; |
| |
| return fd; |
| } |
| |
| void *memory_region_get_ram_ptr(MemoryRegion *mr) |
| { |
| void *ptr; |
| uint64_t offset = 0; |
| |
| RCU_READ_LOCK_GUARD(); |
| while (mr->alias) { |
| offset += mr->alias_offset; |
| mr = mr->alias; |
| } |
| assert(mr->ram_block); |
| ptr = qemu_map_ram_ptr(mr->ram_block, offset); |
| |
| return ptr; |
| } |
| |
| MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset) |
| { |
| RAMBlock *block; |
| |
| block = qemu_ram_block_from_host(ptr, false, offset); |
| if (!block) { |
| return NULL; |
| } |
| |
| return block->mr; |
| } |
| |
| ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr) |
| { |
| return mr->ram_block ? mr->ram_block->offset : RAM_ADDR_INVALID; |
| } |
| |
| void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, Error **errp) |
| { |
| assert(mr->ram_block); |
| |
| qemu_ram_resize(mr->ram_block, newsize, errp); |
| } |
| |
| |
| void memory_region_do_writeback(MemoryRegion *mr, hwaddr addr, hwaddr size) |
| { |
| /* |
| * Might be extended case needed to cover |
| * different types of memory regions |
| */ |
| if (mr->ram_block && mr->dirty_log_mask) { |
| qemu_ram_writeback(mr->ram_block, addr, size); |
| } |
| } |
| |
| /* |
| * Call proper memory listeners about the change on the newly |
| * added/removed CoalescedMemoryRange. |
| */ |
| static void memory_region_update_coalesced_range(MemoryRegion *mr, |
| CoalescedMemoryRange *cmr, |
| bool add) |
| { |
| AddressSpace *as; |
| FlatView *view; |
| FlatRange *fr; |
| |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| view = address_space_get_flatview(as); |
| FOR_EACH_FLAT_RANGE(fr, view) { |
| if (fr->mr == mr) { |
| flat_range_coalesced_io_notify(fr, as, cmr, add); |
| } |
| } |
| flatview_unref(view); |
| } |
| } |
| |
| void memory_region_set_coalescing(MemoryRegion *mr) |
| { |
| memory_region_clear_coalescing(mr); |
| memory_region_add_coalescing(mr, 0, int128_get64(mr->size)); |
| } |
| |
| void memory_region_add_coalescing(MemoryRegion *mr, |
| hwaddr offset, |
| uint64_t size) |
| { |
| CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr)); |
| |
| cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size)); |
| QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link); |
| memory_region_update_coalesced_range(mr, cmr, true); |
| memory_region_set_flush_coalesced(mr); |
| } |
| |
| void memory_region_clear_coalescing(MemoryRegion *mr) |
| { |
| CoalescedMemoryRange *cmr; |
| |
| if (QTAILQ_EMPTY(&mr->coalesced)) { |
| return; |
| } |
| |
| qemu_flush_coalesced_mmio_buffer(); |
| mr->flush_coalesced_mmio = false; |
| |
| while (!QTAILQ_EMPTY(&mr->coalesced)) { |
| cmr = QTAILQ_FIRST(&mr->coalesced); |
| QTAILQ_REMOVE(&mr->coalesced, cmr, link); |
| memory_region_update_coalesced_range(mr, cmr, false); |
| g_free(cmr); |
| } |
| } |
| |
| void memory_region_set_flush_coalesced(MemoryRegion *mr) |
| { |
| mr->flush_coalesced_mmio = true; |
| } |
| |
| void memory_region_clear_flush_coalesced(MemoryRegion *mr) |
| { |
| qemu_flush_coalesced_mmio_buffer(); |
| if (QTAILQ_EMPTY(&mr->coalesced)) { |
| mr->flush_coalesced_mmio = false; |
| } |
| } |
| |
| void memory_region_clear_global_locking(MemoryRegion *mr) |
| { |
| mr->global_locking = false; |
| } |
| |
| static bool userspace_eventfd_warning; |
| |
| void memory_region_add_eventfd(MemoryRegion *mr, |
| hwaddr addr, |
| unsigned size, |
| bool match_data, |
| uint64_t data, |
| EventNotifier *e) |
| { |
| MemoryRegionIoeventfd mrfd = { |
| .addr.start = int128_make64(addr), |
| .addr.size = int128_make64(size), |
| .match_data = match_data, |
| .data = data, |
| .e = e, |
| }; |
| unsigned i; |
| |
| if (kvm_enabled() && (!(kvm_eventfds_enabled() || |
| userspace_eventfd_warning))) { |
| userspace_eventfd_warning = true; |
| error_report("Using eventfd without MMIO binding in KVM. " |
| "Suboptimal performance expected"); |
| } |
| |
| if (size) { |
| adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE); |
| } |
| memory_region_transaction_begin(); |
| for (i = 0; i < mr->ioeventfd_nb; ++i) { |
| if (memory_region_ioeventfd_before(&mrfd, &mr->ioeventfds[i])) { |
| break; |
| } |
| } |
| ++mr->ioeventfd_nb; |
| mr->ioeventfds = g_realloc(mr->ioeventfds, |
| sizeof(*mr->ioeventfds) * mr->ioeventfd_nb); |
| memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i], |
| sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i)); |
| mr->ioeventfds[i] = mrfd; |
| ioeventfd_update_pending |= mr->enabled; |
| memory_region_transaction_commit(); |
| } |
| |
| void memory_region_del_eventfd(MemoryRegion *mr, |
| hwaddr addr, |
| unsigned size, |
| bool match_data, |
| uint64_t data, |
| EventNotifier *e) |
| { |
| MemoryRegionIoeventfd mrfd = { |
| .addr.start = int128_make64(addr), |
| .addr.size = int128_make64(size), |
| .match_data = match_data, |
| .data = data, |
| .e = e, |
| }; |
| unsigned i; |
| |
| if (size) { |
| adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE); |
| } |
| memory_region_transaction_begin(); |
| for (i = 0; i < mr->ioeventfd_nb; ++i) { |
| if (memory_region_ioeventfd_equal(&mrfd, &mr->ioeventfds[i])) { |
| break; |
| } |
| } |
| assert(i != mr->ioeventfd_nb); |
| memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1], |
| sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1))); |
| --mr->ioeventfd_nb; |
| mr->ioeventfds = g_realloc(mr->ioeventfds, |
| sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1); |
| ioeventfd_update_pending |= mr->enabled; |
| memory_region_transaction_commit(); |
| } |
| |
| static void memory_region_update_container_subregions(MemoryRegion *subregion) |
| { |
| MemoryRegion *mr = subregion->container; |
| MemoryRegion *other; |
| |
| memory_region_transaction_begin(); |
| |
| memory_region_ref(subregion); |
| QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { |
| if (subregion->priority >= other->priority) { |
| QTAILQ_INSERT_BEFORE(other, subregion, subregions_link); |
| goto done; |
| } |
| } |
| QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link); |
| done: |
| memory_region_update_pending |= mr->enabled && subregion->enabled; |
| memory_region_transaction_commit(); |
| } |
| |
| static void memory_region_add_subregion_common(MemoryRegion *mr, |
| hwaddr offset, |
| MemoryRegion *subregion) |
| { |
| assert(!subregion->container); |
| subregion->container = mr; |
| subregion->addr = offset; |
| memory_region_update_container_subregions(subregion); |
| } |
| |
| void memory_region_add_subregion(MemoryRegion *mr, |
| hwaddr offset, |
| MemoryRegion *subregion) |
| { |
| subregion->priority = 0; |
| memory_region_add_subregion_common(mr, offset, subregion); |
| } |
| |
| void memory_region_add_subregion_overlap(MemoryRegion *mr, |
| hwaddr offset, |
| MemoryRegion *subregion, |
| int priority) |
| { |
| subregion->priority = priority; |
| memory_region_add_subregion_common(mr, offset, subregion); |
| } |
| |
| void memory_region_del_subregion(MemoryRegion *mr, |
| MemoryRegion *subregion) |
| { |
| memory_region_transaction_begin(); |
| assert(subregion->container == mr); |
| subregion->container = NULL; |
| QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link); |
| memory_region_unref(subregion); |
| memory_region_update_pending |= mr->enabled && subregion->enabled; |
| memory_region_transaction_commit(); |
| } |
| |
| void memory_region_set_enabled(MemoryRegion *mr, bool enabled) |
| { |
| if (enabled == mr->enabled) { |
| return; |
| } |
| memory_region_transaction_begin(); |
| mr->enabled = enabled; |
| memory_region_update_pending = true; |
| memory_region_transaction_commit(); |
| } |
| |
| void memory_region_set_size(MemoryRegion *mr, uint64_t size) |
| { |
| Int128 s = int128_make64(size); |
| |
| if (size == UINT64_MAX) { |
| s = int128_2_64(); |
| } |
| if (int128_eq(s, mr->size)) { |
| return; |
| } |
| memory_region_transaction_begin(); |
| mr->size = s; |
| memory_region_update_pending = true; |
| memory_region_transaction_commit(); |
| } |
| |
| static void memory_region_readd_subregion(MemoryRegion *mr) |
| { |
| MemoryRegion *container = mr->container; |
| |
| if (container) { |
| memory_region_transaction_begin(); |
| memory_region_ref(mr); |
| memory_region_del_subregion(container, mr); |
| mr->container = container; |
| memory_region_update_container_subregions(mr); |
| memory_region_unref(mr); |
| memory_region_transaction_commit(); |
| } |
| } |
| |
| void memory_region_set_address(MemoryRegion *mr, hwaddr addr) |
| { |
| if (addr != mr->addr) { |
| mr->addr = addr; |
| memory_region_readd_subregion(mr); |
| } |
| } |
| |
| void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset) |
| { |
| assert(mr->alias); |
| |
| if (offset == mr->alias_offset) { |
| return; |
| } |
| |
| memory_region_transaction_begin(); |
| mr->alias_offset = offset; |
| memory_region_update_pending |= mr->enabled; |
| memory_region_transaction_commit(); |
| } |
| |
| uint64_t memory_region_get_alignment(const MemoryRegion *mr) |
| { |
| return mr->align; |
| } |
| |
| static int cmp_flatrange_addr(const void *addr_, const void *fr_) |
| { |
| const AddrRange *addr = addr_; |
| const FlatRange *fr = fr_; |
| |
| if (int128_le(addrrange_end(*addr), fr->addr.start)) { |
| return -1; |
| } else if (int128_ge(addr->start, addrrange_end(fr->addr))) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| static FlatRange *flatview_lookup(FlatView *view, AddrRange addr) |
| { |
| return bsearch(&addr, view->ranges, view->nr, |
| sizeof(FlatRange), cmp_flatrange_addr); |
| } |
| |
| bool memory_region_is_mapped(MemoryRegion *mr) |
| { |
| return mr->container ? true : false; |
| } |
| |
| /* Same as memory_region_find, but it does not add a reference to the |
| * returned region. It must be called from an RCU critical section. |
| */ |
| static MemoryRegionSection memory_region_find_rcu(MemoryRegion *mr, |
| hwaddr addr, uint64_t size) |
| { |
| MemoryRegionSection ret = { .mr = NULL }; |
| MemoryRegion *root; |
| AddressSpace *as; |
| AddrRange range; |
| FlatView *view; |
| FlatRange *fr; |
| |
| addr += mr->addr; |
| for (root = mr; root->container; ) { |
| root = root->container; |
| addr += root->addr; |
| } |
| |
| as = memory_region_to_address_space(root); |
| if (!as) { |
| return ret; |
| } |
| range = addrrange_make(int128_make64(addr), int128_make64(size)); |
| |
| view = address_space_to_flatview(as); |
| fr = flatview_lookup(view, range); |
| if (!fr) { |
| return ret; |
| } |
| |
| while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) { |
| --fr; |
| } |
| |
| ret.mr = fr->mr; |
| ret.fv = view; |
| range = addrrange_intersection(range, fr->addr); |
| ret.offset_within_region = fr->offset_in_region; |
| ret.offset_within_region += int128_get64(int128_sub(range.start, |
| fr->addr.start)); |
| ret.size = range.size; |
| ret.offset_within_address_space = int128_get64(range.start); |
| ret.readonly = fr->readonly; |
| ret.nonvolatile = fr->nonvolatile; |
| return ret; |
| } |
| |
| MemoryRegionSection memory_region_find(MemoryRegion *mr, |
| hwaddr addr, uint64_t size) |
| { |
| MemoryRegionSection ret; |
| RCU_READ_LOCK_GUARD(); |
| ret = memory_region_find_rcu(mr, addr, size); |
| if (ret.mr) { |
| memory_region_ref(ret.mr); |
| } |
| return ret; |
| } |
| |
| bool memory_region_present(MemoryRegion *container, hwaddr addr) |
| { |
| MemoryRegion *mr; |
| |
| RCU_READ_LOCK_GUARD(); |
| mr = memory_region_find_rcu(container, addr, 1).mr; |
| return mr && mr != container; |
| } |
| |
| void memory_global_dirty_log_sync(void) |
| { |
| memory_region_sync_dirty_bitmap(NULL); |
| } |
| |
| void memory_global_after_dirty_log_sync(void) |
| { |
| MEMORY_LISTENER_CALL_GLOBAL(log_global_after_sync, Forward); |
| } |
| |
| static VMChangeStateEntry *vmstate_change; |
| |
| void memory_global_dirty_log_start(void) |
| { |
| if (vmstate_change) { |
| qemu_del_vm_change_state_handler(vmstate_change); |
| vmstate_change = NULL; |
| } |
| |
| global_dirty_log = true; |
| |
| MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward); |
| |
| /* Refresh DIRTY_MEMORY_MIGRATION bit. */ |
| memory_region_transaction_begin(); |
| memory_region_update_pending = true; |
| memory_region_transaction_commit(); |
| } |
| |
| static void memory_global_dirty_log_do_stop(void) |
| { |
| global_dirty_log = false; |
| |
| /* Refresh DIRTY_MEMORY_MIGRATION bit. */ |
| memory_region_transaction_begin(); |
| memory_region_update_pending = true; |
| memory_region_transaction_commit(); |
| |
| MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse); |
| } |
| |
| static void memory_vm_change_state_handler(void *opaque, int running, |
| RunState state) |
| { |
| if (running) { |
| memory_global_dirty_log_do_stop(); |
| |
| if (vmstate_change) { |
| qemu_del_vm_change_state_handler(vmstate_change); |
| vmstate_change = NULL; |
| } |
| } |
| } |
| |
| void memory_global_dirty_log_stop(void) |
| { |
| if (!runstate_is_running()) { |
| if (vmstate_change) { |
| return; |
| } |
| vmstate_change = qemu_add_vm_change_state_handler( |
| memory_vm_change_state_handler, NULL); |
| return; |
| } |
| |
| memory_global_dirty_log_do_stop(); |
| } |
| |
| static void listener_add_address_space(MemoryListener *listener, |
| AddressSpace *as) |
| { |
| FlatView *view; |
| FlatRange *fr; |
| |
| if (listener->begin) { |
| listener->begin(listener); |
| } |
| if (global_dirty_log) { |
| if (listener->log_global_start) { |
| listener->log_global_start(listener); |
| } |
| } |
| |
| view = address_space_get_flatview(as); |
| FOR_EACH_FLAT_RANGE(fr, view) { |
| MemoryRegionSection section = section_from_flat_range(fr, view); |
| |
| if (listener->region_add) { |
| listener->region_add(listener, §ion); |
| } |
| if (fr->dirty_log_mask && listener->log_start) { |
| listener->log_start(listener, §ion, 0, fr->dirty_log_mask); |
| } |
| } |
| if (listener->commit) { |
| listener->commit(listener); |
| } |
| flatview_unref(view); |
| } |
| |
| static void listener_del_address_space(MemoryListener *listener, |
| AddressSpace *as) |
| { |
| FlatView *view; |
| FlatRange *fr; |
| |
| if (listener->begin) { |
| listener->begin(listener); |
| } |
| view = address_space_get_flatview(as); |
| FOR_EACH_FLAT_RANGE(fr, view) { |
| MemoryRegionSection section = section_from_flat_range(fr, view); |
| |
| if (fr->dirty_log_mask && listener->log_stop) { |
| listener->log_stop(listener, §ion, fr->dirty_log_mask, 0); |
| } |
| if (listener->region_del) { |
| listener->region_del(listener, §ion); |
| } |
| } |
| if (listener->commit) { |
| listener->commit(listener); |
| } |
| flatview_unref(view); |
| } |
| |
| void memory_listener_register(MemoryListener *listener, AddressSpace *as) |
| { |
| MemoryListener *other = NULL; |
| |
| listener->address_space = as; |
| if (QTAILQ_EMPTY(&memory_listeners) |
| || listener->priority >= QTAILQ_LAST(&memory_listeners)->priority) { |
| QTAILQ_INSERT_TAIL(&memory_listeners, listener, link); |
| } else { |
| QTAILQ_FOREACH(other, &memory_listeners, link) { |
| if (listener->priority < other->priority) { |
| break; |
| } |
| } |
| QTAILQ_INSERT_BEFORE(other, listener, link); |
| } |
| |
| if (QTAILQ_EMPTY(&as->listeners) |
| || listener->priority >= QTAILQ_LAST(&as->listeners)->priority) { |
| QTAILQ_INSERT_TAIL(&as->listeners, listener, link_as); |
| } else { |
| QTAILQ_FOREACH(other, &as->listeners, link_as) { |
| if (listener->priority < other->priority) { |
| break; |
| } |
| } |
| QTAILQ_INSERT_BEFORE(other, listener, link_as); |
| } |
| |
| listener_add_address_space(listener, as); |
| } |
| |
| void memory_listener_unregister(MemoryListener *listener) |
| { |
| if (!listener->address_space) { |
| return; |
| } |
| |
| listener_del_address_space(listener, listener->address_space); |
| QTAILQ_REMOVE(&memory_listeners, listener, link); |
| QTAILQ_REMOVE(&listener->address_space->listeners, listener, link_as); |
| listener->address_space = NULL; |
| } |
| |
| void address_space_remove_listeners(AddressSpace *as) |
| { |
| while (!QTAILQ_EMPTY(&as->listeners)) { |
| memory_listener_unregister(QTAILQ_FIRST(&as->listeners)); |
| } |
| } |
| |
| void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name) |
| { |
| memory_region_ref(root); |
| as->root = root; |
| as->current_map = NULL; |
| as->ioeventfd_nb = 0; |
| as->ioeventfds = NULL; |
| QTAILQ_INIT(&as->listeners); |
| QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link); |
| as->name = g_strdup(name ? name : "anonymous"); |
| address_space_update_topology(as); |
| address_space_update_ioeventfds(as); |
| } |
| |
| static void do_address_space_destroy(AddressSpace *as) |
| { |
| assert(QTAILQ_EMPTY(&as->listeners)); |
| |
| flatview_unref(as->current_map); |
| g_free(as->name); |
| g_free(as->ioeventfds); |
| memory_region_unref(as->root); |
| } |
| |
| void address_space_destroy(AddressSpace *as) |
| { |
| MemoryRegion *root = as->root; |
| |
| /* Flush out anything from MemoryListeners listening in on this */ |
| memory_region_transaction_begin(); |
| as->root = NULL; |
| memory_region_transaction_commit(); |
| QTAILQ_REMOVE(&address_spaces, as, address_spaces_link); |
| |
| /* At this point, as->dispatch and as->current_map are dummy |
| * entries that the guest should never use. Wait for the old |
| * values to expire before freeing the data. |
| */ |
| as->root = root; |
| call_rcu(as, do_address_space_destroy, rcu); |
| } |
| |
| static const char *memory_region_type(MemoryRegion *mr) |
| { |
| if (mr->alias) { |
| return memory_region_type(mr->alias); |
| } |
| if (memory_region_is_ram_device(mr)) { |
| return "ramd"; |
| } else if (memory_region_is_romd(mr)) { |
| return "romd"; |
| } else if (memory_region_is_rom(mr)) { |
| return "rom"; |
| } else if (memory_region_is_ram(mr)) { |
| return "ram"; |
| } else { |
| return "i/o"; |
| } |
| } |
| |
| typedef struct MemoryRegionList MemoryRegionList; |
| |
| struct MemoryRegionList { |
| const MemoryRegion *mr; |
| QTAILQ_ENTRY(MemoryRegionList) mrqueue; |
| }; |
| |
| typedef QTAILQ_HEAD(, MemoryRegionList) MemoryRegionListHead; |
| |
| #define MR_SIZE(size) (int128_nz(size) ? (hwaddr)int128_get64( \ |
| int128_sub((size), int128_one())) : 0) |
| #define MTREE_INDENT " " |
| |
| static void mtree_expand_owner(const char *label, Object *obj) |
| { |
| DeviceState *dev = (DeviceState *) object_dynamic_cast(obj, TYPE_DEVICE); |
| |
| qemu_printf(" %s:{%s", label, dev ? "dev" : "obj"); |
| if (dev && dev->id) { |
| qemu_printf(" id=%s", dev->id); |
| } else { |
| gchar *canonical_path = object_get_canonical_path(obj); |
| if (canonical_path) { |
| qemu_printf(" path=%s", canonical_path); |
| g_free(canonical_path); |
| } else { |
| qemu_printf(" type=%s", object_get_typename(obj)); |
| } |
| } |
| qemu_printf("}"); |
| } |
| |
| static void mtree_print_mr_owner(const MemoryRegion *mr) |
| { |
| Object *owner = mr->owner; |
| Object *parent = memory_region_owner((MemoryRegion *)mr); |
| |
| if (!owner && !parent) { |
| qemu_printf(" orphan"); |
| return; |
| } |
| if (owner) { |
| mtree_expand_owner("owner", owner); |
| } |
| if (parent && parent != owner) { |
| mtree_expand_owner("parent", parent); |
| } |
| } |
| |
| static void mtree_print_mr(const MemoryRegion *mr, unsigned int level, |
| hwaddr base, |
| MemoryRegionListHead *alias_print_queue, |
| bool owner) |
| { |
| MemoryRegionList *new_ml, *ml, *next_ml; |
| MemoryRegionListHead submr_print_queue; |
| const MemoryRegion *submr; |
| unsigned int i; |
| hwaddr cur_start, cur_end; |
| |
| if (!mr) { |
| return; |
| } |
| |
| for (i = 0; i < level; i++) { |
| qemu_printf(MTREE_INDENT); |
| } |
| |
| cur_start = base + mr->addr; |
| cur_end = cur_start + MR_SIZE(mr->size); |
| |
| /* |
| * Try to detect overflow of memory region. This should never |
| * happen normally. When it happens, we dump something to warn the |
| * user who is observing this. |
| */ |
| if (cur_start < base || cur_end < cur_start) { |
| qemu_printf("[DETECTED OVERFLOW!] "); |
| } |
| |
| if (mr->alias) { |
| MemoryRegionList *ml; |
| bool found = false; |
| |
| /* check if the alias is already in the queue */ |
| QTAILQ_FOREACH(ml, alias_print_queue, mrqueue) { |
| if (ml->mr == mr->alias) { |
| found = true; |
| } |
| } |
| |
| if (!found) { |
| ml = g_new(MemoryRegionList, 1); |
| ml->mr = mr->alias; |
| QTAILQ_INSERT_TAIL(alias_print_queue, ml, mrqueue); |
| } |
| qemu_printf(TARGET_FMT_plx "-" TARGET_FMT_plx |
| " (prio %d, %s%s): alias %s @%s " TARGET_FMT_plx |
| "-" TARGET_FMT_plx "%s", |
| cur_start, cur_end, |
| mr->priority, |
| mr->nonvolatile ? "nv-" : "", |
| memory_region_type((MemoryRegion *)mr), |
| memory_region_name(mr), |
| memory_region_name(mr->alias), |
| mr->alias_offset, |
| mr->alias_offset + MR_SIZE(mr->size), |
| mr->enabled ? "" : " [disabled]"); |
| if (owner) { |
| mtree_print_mr_owner(mr); |
| } |
| } else { |
| qemu_printf(TARGET_FMT_plx "-" TARGET_FMT_plx |
| " (prio %d, %s%s): %s%s", |
| cur_start, cur_end, |
| mr->priority, |
| mr->nonvolatile ? "nv-" : "", |
| memory_region_type((MemoryRegion *)mr), |
| memory_region_name(mr), |
| mr->enabled ? "" : " [disabled]"); |
| if (owner) { |
| mtree_print_mr_owner(mr); |
| } |
| } |
| qemu_printf("\n"); |
| |
| QTAILQ_INIT(&submr_print_queue); |
| |
| QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) { |
| new_ml = g_new(MemoryRegionList, 1); |
| new_ml->mr = submr; |
| QTAILQ_FOREACH(ml, &submr_print_queue, mrqueue) { |
| if (new_ml->mr->addr < ml->mr->addr || |
| (new_ml->mr->addr == ml->mr->addr && |
| new_ml->mr->priority > ml
|