| /* |
| * 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 "exec/memory.h" |
| #include "exec/address-spaces.h" |
| #include "exec/ioport.h" |
| #include "qapi/visitor.h" |
| #include "qemu/bitops.h" |
| #include "qom/object.h" |
| #include "trace.h" |
| #include <assert.h> |
| |
| #include "exec/memory-internal.h" |
| #include "exec/ram_addr.h" |
| #include "sysemu/sysemu.h" |
| |
| //#define DEBUG_UNASSIGNED |
| |
| static unsigned memory_region_transaction_depth; |
| static bool memory_region_update_pending; |
| static bool ioeventfd_update_pending; |
| static bool global_dirty_log = false; |
| |
| /* flat_view_mutex is taken around reading as->current_map; the critical |
| * section is extremely short, so I'm using a single mutex for every AS. |
| * We could also RCU for the read-side. |
| * |
| * The BQL is taken around transaction commits, hence both locks are taken |
| * while writing to as->current_map (with the BQL taken outside). |
| */ |
| static QemuMutex flat_view_mutex; |
| |
| static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners |
| = QTAILQ_HEAD_INITIALIZER(memory_listeners); |
| |
| static QTAILQ_HEAD(, AddressSpace) address_spaces |
| = QTAILQ_HEAD_INITIALIZER(address_spaces); |
| |
| static void memory_init(void) |
| { |
| qemu_mutex_init(&flat_view_mutex); |
| } |
| |
| 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 }; |
| |
| static bool memory_listener_match(MemoryListener *listener, |
| MemoryRegionSection *section) |
| { |
| return !listener->address_space_filter |
| || listener->address_space_filter == section->address_space; |
| } |
| |
| #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, \ |
| memory_listeners, link) { \ |
| if (_listener->_callback) { \ |
| _listener->_callback(_listener, ##_args); \ |
| } \ |
| } \ |
| break; \ |
| default: \ |
| abort(); \ |
| } \ |
| } while (0) |
| |
| #define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \ |
| do { \ |
| MemoryListener *_listener; \ |
| \ |
| switch (_direction) { \ |
| case Forward: \ |
| QTAILQ_FOREACH(_listener, &memory_listeners, link) { \ |
| if (_listener->_callback \ |
| && memory_listener_match(_listener, _section)) { \ |
| _listener->_callback(_listener, _section, ##_args); \ |
| } \ |
| } \ |
| break; \ |
| case Reverse: \ |
| QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \ |
| memory_listeners, link) { \ |
| if (_listener->_callback \ |
| && memory_listener_match(_listener, _section)) { \ |
| _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) \ |
| MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \ |
| .mr = (fr)->mr, \ |
| .address_space = (as), \ |
| .offset_within_region = (fr)->offset_in_region, \ |
| .size = (fr)->addr.size, \ |
| .offset_within_address_space = int128_get64((fr)->addr.start), \ |
| .readonly = (fr)->readonly, \ |
| })) |
| |
| 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); |
| } |
| |
| typedef struct FlatRange FlatRange; |
| typedef struct FlatView FlatView; |
| |
| /* 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; |
| }; |
| |
| /* Flattened global view of current active memory hierarchy. Kept in sorted |
| * order. |
| */ |
| struct FlatView { |
| unsigned ref; |
| FlatRange *ranges; |
| unsigned nr; |
| unsigned nr_allocated; |
| }; |
| |
| typedef struct AddressSpaceOps AddressSpaceOps; |
| |
| #define FOR_EACH_FLAT_RANGE(var, view) \ |
| for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var) |
| |
| 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; |
| } |
| |
| static void flatview_init(FlatView *view) |
| { |
| view->ref = 1; |
| view->ranges = NULL; |
| view->nr = 0; |
| view->nr_allocated = 0; |
| } |
| |
| /* 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; |
| |
| for (i = 0; i < view->nr; i++) { |
| memory_region_unref(view->ranges[i].mr); |
| } |
| g_free(view->ranges); |
| g_free(view); |
| } |
| |
| static void flatview_ref(FlatView *view) |
| { |
| atomic_inc(&view->ref); |
| } |
| |
| static void flatview_unref(FlatView *view) |
| { |
| if (atomic_fetch_dec(&view->ref) == 1) { |
| flatview_destroy(view); |
| } |
| } |
| |
| 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; |
| } |
| |
| /* Attempt to simplify a view by merging adjacent ranges */ |
| static void flatview_simplify(FlatView *view) |
| { |
| unsigned i, j; |
| |
| 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; |
| 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 bool memory_region_wrong_endianness(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, unsigned size) |
| { |
| if (memory_region_wrong_endianness(mr)) { |
| switch (size) { |
| case 1: |
| break; |
| case 2: |
| *data = bswap16(*data); |
| break; |
| case 4: |
| *data = bswap32(*data); |
| break; |
| case 8: |
| *data = bswap64(*data); |
| break; |
| default: |
| abort(); |
| } |
| } |
| } |
| |
| static void memory_region_oldmmio_read_accessor(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned shift, |
| uint64_t mask) |
| { |
| uint64_t tmp; |
| |
| tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr); |
| trace_memory_region_ops_read(mr, addr, tmp, size); |
| *value |= (tmp & mask) << shift; |
| } |
| |
| static void memory_region_read_accessor(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned shift, |
| uint64_t mask) |
| { |
| uint64_t tmp; |
| |
| if (mr->flush_coalesced_mmio) { |
| qemu_flush_coalesced_mmio_buffer(); |
| } |
| tmp = mr->ops->read(mr->opaque, addr, size); |
| trace_memory_region_ops_read(mr, addr, tmp, size); |
| *value |= (tmp & mask) << shift; |
| } |
| |
| static void memory_region_oldmmio_write_accessor(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned shift, |
| uint64_t mask) |
| { |
| uint64_t tmp; |
| |
| tmp = (*value >> shift) & mask; |
| trace_memory_region_ops_write(mr, addr, tmp, size); |
| mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp); |
| } |
| |
| static void memory_region_write_accessor(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned shift, |
| uint64_t mask) |
| { |
| uint64_t tmp; |
| |
| if (mr->flush_coalesced_mmio) { |
| qemu_flush_coalesced_mmio_buffer(); |
| } |
| tmp = (*value >> shift) & mask; |
| trace_memory_region_ops_write(mr, addr, tmp, size); |
| mr->ops->write(mr->opaque, addr, tmp, size); |
| } |
| |
| static void access_with_adjusted_size(hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned access_size_min, |
| unsigned access_size_max, |
| void (*access)(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned shift, |
| uint64_t mask), |
| MemoryRegion *mr) |
| { |
| uint64_t access_mask; |
| unsigned access_size; |
| unsigned i; |
| |
| 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 = -1ULL >> (64 - access_size * 8); |
| if (memory_region_big_endian(mr)) { |
| for (i = 0; i < size; i += access_size) { |
| access(mr, addr + i, value, access_size, |
| (size - access_size - i) * 8, access_mask); |
| } |
| } else { |
| for (i = 0; i < size; i += access_size) { |
| access(mr, addr + i, value, access_size, i * 8, access_mask); |
| } |
| } |
| } |
| |
| 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) |
| { |
| 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; |
| |
| 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); |
| return; |
| } |
| |
| /* Render subregions in priority order. */ |
| QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) { |
| render_memory_region(view, subregion, base, clip, readonly); |
| } |
| |
| 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 = mr->dirty_log_mask; |
| fr.romd_mode = mr->romd_mode; |
| fr.readonly = readonly; |
| |
| /* 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); |
| } |
| } |
| |
| /* Render a memory topology into a list of disjoint absolute ranges. */ |
| static FlatView *generate_memory_topology(MemoryRegion *mr) |
| { |
| FlatView *view; |
| |
| view = g_new(FlatView, 1); |
| flatview_init(view); |
| |
| if (mr) { |
| render_memory_region(view, mr, int128_zero(), |
| addrrange_make(int128_zero(), int128_2_64()), false); |
| } |
| flatview_simplify(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) { |
| .address_space = as, |
| .offset_within_address_space = int128_get64(fd->addr.start), |
| .size = fd->addr.size, |
| }; |
| MEMORY_LISTENER_CALL(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) { |
| .address_space = as, |
| .offset_within_address_space = int128_get64(fd->addr.start), |
| .size = fd->addr.size, |
| }; |
| MEMORY_LISTENER_CALL(eventfd_add, Reverse, §ion, |
| fd->match_data, fd->data, fd->e); |
| ++inew; |
| } else { |
| ++iold; |
| ++inew; |
| } |
| } |
| } |
| |
| static FlatView *address_space_get_flatview(AddressSpace *as) |
| { |
| FlatView *view; |
| |
| qemu_mutex_lock(&flat_view_mutex); |
| view = as->current_map; |
| flatview_ref(view); |
| qemu_mutex_unlock(&flat_view_mutex); |
| return view; |
| } |
| |
| static void address_space_update_ioeventfds(AddressSpace *as) |
| { |
| FlatView *view; |
| FlatRange *fr; |
| unsigned ioeventfd_nb = 0; |
| MemoryRegionIoeventfd *ioeventfds = NULL; |
| AddrRange tmp; |
| unsigned i; |
| |
| 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; |
| ioeventfds = g_realloc(ioeventfds, |
| ioeventfd_nb * 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); |
| } |
| |
| 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) { |
| 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 (frold->dirty_log_mask && !frnew->dirty_log_mask) { |
| MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop); |
| } else if (frnew->dirty_log_mask && !frold->dirty_log_mask) { |
| MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start); |
| } |
| } |
| |
| ++iold; |
| ++inew; |
| } else { |
| /* In new */ |
| |
| if (adding) { |
| MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add); |
| } |
| |
| ++inew; |
| } |
| } |
| } |
| |
| |
| static void address_space_update_topology(AddressSpace *as) |
| { |
| FlatView *old_view = address_space_get_flatview(as); |
| FlatView *new_view = generate_memory_topology(as->root); |
| |
| address_space_update_topology_pass(as, old_view, new_view, false); |
| address_space_update_topology_pass(as, old_view, new_view, true); |
| |
| qemu_mutex_lock(&flat_view_mutex); |
| flatview_unref(as->current_map); |
| as->current_map = new_view; |
| qemu_mutex_unlock(&flat_view_mutex); |
| |
| /* 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. |
| */ |
| flatview_unref(old_view); |
| |
| address_space_update_ioeventfds(as); |
| } |
| |
| void memory_region_transaction_begin(void) |
| { |
| qemu_flush_coalesced_mmio_buffer(); |
| ++memory_region_transaction_depth; |
| } |
| |
| static void memory_region_clear_pending(void) |
| { |
| memory_region_update_pending = false; |
| ioeventfd_update_pending = false; |
| } |
| |
| void memory_region_transaction_commit(void) |
| { |
| AddressSpace *as; |
| |
| assert(memory_region_transaction_depth); |
| --memory_region_transaction_depth; |
| if (!memory_region_transaction_depth) { |
| if (memory_region_update_pending) { |
| MEMORY_LISTENER_CALL_GLOBAL(begin, Forward); |
| |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| address_space_update_topology(as); |
| } |
| |
| MEMORY_LISTENER_CALL_GLOBAL(commit, Forward); |
| } else if (ioeventfd_update_pending) { |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| address_space_update_ioeventfds(as); |
| } |
| } |
| memory_region_clear_pending(); |
| } |
| } |
| |
| static void memory_region_destructor_none(MemoryRegion *mr) |
| { |
| } |
| |
| static void memory_region_destructor_ram(MemoryRegion *mr) |
| { |
| qemu_ram_free(mr->ram_addr); |
| } |
| |
| static void memory_region_destructor_alias(MemoryRegion *mr) |
| { |
| memory_region_unref(mr->alias); |
| } |
| |
| static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr) |
| { |
| qemu_ram_free_from_ptr(mr->ram_addr); |
| } |
| |
| static void memory_region_destructor_rom_device(MemoryRegion *mr) |
| { |
| qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK); |
| } |
| |
| 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 object_property_add_child_array(Object *owner, |
| const char *name, |
| Object *child) |
| { |
| int i; |
| char *base_name = memory_region_escape_name(name); |
| |
| for (i = 0; ; i++) { |
| char *full_name = g_strdup_printf("%s[%d]", base_name, i); |
| Error *local_err = NULL; |
| |
| object_property_add_child(owner, full_name, child, &local_err); |
| g_free(full_name); |
| if (!local_err) { |
| break; |
| } |
| |
| error_free(local_err); |
| } |
| |
| g_free(base_name); |
| } |
| |
| |
| void memory_region_init(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size) |
| { |
| if (!owner) { |
| owner = qdev_get_machine(); |
| } |
| |
| object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION); |
| mr->size = int128_make64(size); |
| if (size == UINT64_MAX) { |
| mr->size = int128_2_64(); |
| } |
| mr->name = g_strdup(name); |
| |
| if (name) { |
| object_property_add_child_array(owner, name, OBJECT(mr)); |
| object_unref(OBJECT(mr)); |
| } |
| } |
| |
| static void memory_region_get_addr(Object *obj, Visitor *v, void *opaque, |
| const char *name, Error **errp) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| uint64_t value = mr->addr; |
| |
| visit_type_uint64(v, &value, name, errp); |
| } |
| |
| static void memory_region_get_container(Object *obj, Visitor *v, void *opaque, |
| const char *name, 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, &path, name, 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, void *opaque, |
| const char *name, Error **errp) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| int32_t value = mr->priority; |
| |
| visit_type_int32(v, &value, name, errp); |
| } |
| |
| static bool memory_region_get_may_overlap(Object *obj, Error **errp) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| |
| return mr->may_overlap; |
| } |
| |
| static void memory_region_get_size(Object *obj, Visitor *v, void *opaque, |
| const char *name, Error **errp) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| uint64_t value = memory_region_size(mr); |
| |
| visit_type_uint64(v, &value, name, 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->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(OBJECT(mr), "addr", "uint64", |
| memory_region_get_addr, |
| NULL, /* memory_region_set_addr */ |
| NULL, NULL, &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_bool(OBJECT(mr), "may-overlap", |
| memory_region_get_may_overlap, |
| NULL, /* memory_region_set_may_overlap */ |
| &error_abort); |
| object_property_add(OBJECT(mr), "size", "uint64", |
| memory_region_get_size, |
| NULL, /* memory_region_set_size, */ |
| NULL, NULL, &error_abort); |
| } |
| |
| 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 |
| if (current_cpu != NULL) { |
| cpu_unassigned_access(current_cpu, addr, false, false, 0, size); |
| } |
| 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 |
| if (current_cpu != NULL) { |
| cpu_unassigned_access(current_cpu, addr, true, false, 0, size); |
| } |
| } |
| |
| static bool unassigned_mem_accepts(void *opaque, hwaddr addr, |
| unsigned size, bool is_write) |
| { |
| return false; |
| } |
| |
| const MemoryRegionOps unassigned_mem_ops = { |
| .valid.accepts = unassigned_mem_accepts, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| bool memory_region_access_valid(MemoryRegion *mr, |
| hwaddr addr, |
| unsigned size, |
| bool is_write) |
| { |
| 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)) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| static uint64_t memory_region_dispatch_read1(MemoryRegion *mr, |
| hwaddr addr, |
| unsigned size) |
| { |
| uint64_t data = 0; |
| |
| if (mr->ops->read) { |
| access_with_adjusted_size(addr, &data, size, |
| mr->ops->impl.min_access_size, |
| mr->ops->impl.max_access_size, |
| memory_region_read_accessor, mr); |
| } else { |
| access_with_adjusted_size(addr, &data, size, 1, 4, |
| memory_region_oldmmio_read_accessor, mr); |
| } |
| |
| return data; |
| } |
| |
| static bool memory_region_dispatch_read(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *pval, |
| unsigned size) |
| { |
| if (!memory_region_access_valid(mr, addr, size, false)) { |
| *pval = unassigned_mem_read(mr, addr, size); |
| return true; |
| } |
| |
| *pval = memory_region_dispatch_read1(mr, addr, size); |
| adjust_endianness(mr, pval, size); |
| return false; |
| } |
| |
| static bool memory_region_dispatch_write(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t data, |
| unsigned size) |
| { |
| if (!memory_region_access_valid(mr, addr, size, true)) { |
| unassigned_mem_write(mr, addr, data, size); |
| return true; |
| } |
| |
| adjust_endianness(mr, &data, size); |
| |
| if (mr->ops->write) { |
| access_with_adjusted_size(addr, &data, size, |
| mr->ops->impl.min_access_size, |
| mr->ops->impl.max_access_size, |
| memory_region_write_accessor, mr); |
| } else { |
| access_with_adjusted_size(addr, &data, size, 1, 4, |
| memory_region_oldmmio_write_accessor, mr); |
| } |
| return false; |
| } |
| |
| 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; |
| mr->opaque = opaque; |
| mr->terminates = true; |
| mr->ram_addr = ~(ram_addr_t)0; |
| } |
| |
| void memory_region_init_ram(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size) |
| { |
| memory_region_init(mr, owner, name, size); |
| mr->ram = true; |
| mr->terminates = true; |
| mr->destructor = memory_region_destructor_ram; |
| mr->ram_addr = qemu_ram_alloc(size, mr); |
| } |
| |
| #ifdef __linux__ |
| void memory_region_init_ram_from_file(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| uint64_t size, |
| bool share, |
| const char *path, |
| Error **errp) |
| { |
| memory_region_init(mr, owner, name, size); |
| mr->ram = true; |
| mr->terminates = true; |
| mr->destructor = memory_region_destructor_ram; |
| mr->ram_addr = qemu_ram_alloc_from_file(size, mr, share, path, errp); |
| } |
| #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_from_ptr; |
| mr->ram_addr = qemu_ram_alloc_from_ptr(size, ptr, mr); |
| } |
| |
| 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); |
| memory_region_ref(orig); |
| mr->destructor = memory_region_destructor_alias; |
| mr->alias = orig; |
| mr->alias_offset = offset; |
| } |
| |
| void memory_region_init_rom_device(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; |
| mr->opaque = opaque; |
| mr->terminates = true; |
| mr->rom_device = true; |
| mr->destructor = memory_region_destructor_rom_device; |
| mr->ram_addr = qemu_ram_alloc(size, mr); |
| } |
| |
| void memory_region_init_iommu(MemoryRegion *mr, |
| Object *owner, |
| const MemoryRegionIOMMUOps *ops, |
| const char *name, |
| uint64_t size) |
| { |
| memory_region_init(mr, owner, name, size); |
| mr->iommu_ops = ops, |
| mr->terminates = true; /* then re-forwards */ |
| notifier_list_init(&mr->iommu_notify); |
| } |
| |
| void memory_region_init_reservation(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size) |
| { |
| memory_region_init_io(mr, owner, &unassigned_mem_ops, mr, name, size); |
| } |
| |
| static void memory_region_finalize(Object *obj) |
| { |
| MemoryRegion *mr = MEMORY_REGION(obj); |
| |
| assert(QTAILQ_EMPTY(&mr->subregions)); |
| assert(memory_region_transaction_depth == 0); |
| 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, |
| * but we still ref/unref them for debugging purposes. |
| */ |
| Object *obj = OBJECT(mr); |
| if (obj && obj->parent) { |
| object_ref(obj->parent); |
| } else { |
| object_ref(obj); |
| } |
| } |
| |
| void memory_region_unref(MemoryRegion *mr) |
| { |
| Object *obj = OBJECT(mr); |
| if (obj && obj->parent) { |
| object_unref(obj->parent); |
| } else { |
| object_unref(obj); |
| } |
| } |
| |
| 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(MemoryRegion *mr) |
| { |
| return mr->ram; |
| } |
| |
| bool memory_region_is_logging(MemoryRegion *mr) |
| { |
| return mr->dirty_log_mask; |
| } |
| |
| bool memory_region_is_rom(MemoryRegion *mr) |
| { |
| return mr->ram && mr->readonly; |
| } |
| |
| bool memory_region_is_iommu(MemoryRegion *mr) |
| { |
| return mr->iommu_ops; |
| } |
| |
| void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n) |
| { |
| notifier_list_add(&mr->iommu_notify, n); |
| } |
| |
| void memory_region_unregister_iommu_notifier(Notifier *n) |
| { |
| notifier_remove(n); |
| } |
| |
| void memory_region_notify_iommu(MemoryRegion *mr, |
| IOMMUTLBEntry entry) |
| { |
| assert(memory_region_is_iommu(mr)); |
| notifier_list_notify(&mr->iommu_notify, &entry); |
| } |
| |
| void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client) |
| { |
| uint8_t mask = 1 << client; |
| |
| 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(); |
| } |
| |
| bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr, |
| hwaddr size, unsigned client) |
| { |
| assert(mr->terminates); |
| return cpu_physical_memory_get_dirty(mr->ram_addr + addr, size, client); |
| } |
| |
| void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr, |
| hwaddr size) |
| { |
| assert(mr->terminates); |
| cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size); |
| } |
| |
| bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr, |
| hwaddr size, unsigned client) |
| { |
| bool ret; |
| assert(mr->terminates); |
| ret = cpu_physical_memory_get_dirty(mr->ram_addr + addr, size, client); |
| if (ret) { |
| cpu_physical_memory_reset_dirty(mr->ram_addr + addr, size, client); |
| } |
| return ret; |
| } |
| |
| |
| void memory_region_sync_dirty_bitmap(MemoryRegion *mr) |
| { |
| AddressSpace *as; |
| FlatRange *fr; |
| |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| FlatView *view = address_space_get_flatview(as); |
| FOR_EACH_FLAT_RANGE(fr, view) { |
| if (fr->mr == mr) { |
| MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync); |
| } |
| } |
| flatview_unref(view); |
| } |
| } |
| |
| 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_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->terminates); |
| cpu_physical_memory_reset_dirty(mr->ram_addr + addr, size, client); |
| } |
| |
| int memory_region_get_fd(MemoryRegion *mr) |
| { |
| if (mr->alias) { |
| return memory_region_get_fd(mr->alias); |
| } |
| |
| assert(mr->terminates); |
| |
| return qemu_get_ram_fd(mr->ram_addr & TARGET_PAGE_MASK); |
| } |
| |
| void *memory_region_get_ram_ptr(MemoryRegion *mr) |
| { |
| if (mr->alias) { |
| return memory_region_get_ram_ptr(mr->alias) + mr->alias_offset; |
| } |
| |
| assert(mr->terminates); |
| |
| return qemu_get_ram_ptr(mr->ram_addr & TARGET_PAGE_MASK); |
| } |
| |
| static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as) |
| { |
| FlatView *view; |
| FlatRange *fr; |
| CoalescedMemoryRange *cmr; |
| AddrRange tmp; |
| MemoryRegionSection section; |
| |
| view = address_space_get_flatview(as); |
| FOR_EACH_FLAT_RANGE(fr, view) { |
| if (fr->mr == mr) { |
| section = (MemoryRegionSection) { |
| .address_space = as, |
| .offset_within_address_space = int128_get64(fr->addr.start), |
| .size = fr->addr.size, |
| }; |
| |
| MEMORY_LISTENER_CALL(coalesced_mmio_del, Reverse, §ion, |
| int128_get64(fr->addr.start), |
| int128_get64(fr->addr.size)); |
| QTAILQ_FOREACH(cmr, &mr->coalesced, link) { |
| tmp = addrrange_shift(cmr->addr, |
| int128_sub(fr->addr.start, |
| int128_make64(fr->offset_in_region))); |
| if (!addrrange_intersects(tmp, fr->addr)) { |
| continue; |
| } |
| tmp = addrrange_intersection(tmp, fr->addr); |
| MEMORY_LISTENER_CALL(coalesced_mmio_add, Forward, §ion, |
| int128_get64(tmp.start), |
| int128_get64(tmp.size)); |
| } |
| } |
| } |
| flatview_unref(view); |
| } |
| |
| static void memory_region_update_coalesced_range(MemoryRegion *mr) |
| { |
| AddressSpace *as; |
| |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| memory_region_update_coalesced_range_as(mr, as); |
| } |
| } |
| |
| 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); |
| memory_region_set_flush_coalesced(mr); |
| } |
| |
| void memory_region_clear_coalescing(MemoryRegion *mr) |
| { |
| CoalescedMemoryRange *cmr; |
| bool updated = false; |
| |
| 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); |
| g_free(cmr); |
| updated = true; |
| } |
| |
| if (updated) { |
| memory_region_update_coalesced_range(mr); |
| } |
| } |
| |
| 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_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; |
| |
| adjust_endianness(mr, &mrfd.data, size); |
| 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; |
| |
| adjust_endianness(mr, &mrfd.data, size); |
| 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) |
| { |
| hwaddr offset = subregion->addr; |
| MemoryRegion *mr = subregion->container; |
| MemoryRegion *other; |
| |
| memory_region_transaction_begin(); |
| |
| memory_region_ref(subregion); |
| QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { |
| if (subregion->may_overlap || other->may_overlap) { |
| continue; |
| } |
| if (int128_ge(int128_make64(offset), |
| int128_add(int128_make64(other->addr), other->size)) |
| || int128_le(int128_add(int128_make64(offset), subregion->size), |
| int128_make64(other->addr))) { |
| continue; |
| } |
| #if 0 |
| printf("warning: subregion collision %llx/%llx (%s) " |
| "vs %llx/%llx (%s)\n", |
| (unsigned long long)offset, |
| (unsigned long long)int128_get64(subregion->size), |
| subregion->name, |
| (unsigned long long)other->addr, |
| (unsigned long long)int128_get64(other->size), |
| other->name); |
| #endif |
| } |
| 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->may_overlap = false; |
| 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->may_overlap = true; |
| 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(); |
| } |
| |
| 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(); |
| } |
| |
| ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr) |
| { |
| return mr->ram_addr; |
| } |
| |
| 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_present(MemoryRegion *container, hwaddr addr) |
| { |
| MemoryRegion *mr = memory_region_find(container, addr, 1).mr; |
| if (!mr || (mr == container)) { |
| return false; |
| } |
| memory_region_unref(mr); |
| return true; |
| } |
| |
| bool memory_region_is_mapped(MemoryRegion *mr) |
| { |
| return mr->container ? true : false; |
| } |
| |
| MemoryRegionSection memory_region_find(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_get_flatview(as); |
| fr = flatview_lookup(view, range); |
| if (!fr) { |
| flatview_unref(view); |
| return ret; |
| } |
| |
| while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) { |
| --fr; |
| } |
| |
| ret.mr = fr->mr; |
| ret.address_space = as; |
| 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; |
| memory_region_ref(ret.mr); |
| |
| flatview_unref(view); |
| return ret; |
| } |
| |
| void address_space_sync_dirty_bitmap(AddressSpace *as) |
| { |
| FlatView *view; |
| FlatRange *fr; |
| |
| view = address_space_get_flatview(as); |
| FOR_EACH_FLAT_RANGE(fr, view) { |
| MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync); |
| } |
| flatview_unref(view); |
| } |
| |
| void memory_global_dirty_log_start(void) |
| { |
| global_dirty_log = true; |
| MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward); |
| } |
| |
| void memory_global_dirty_log_stop(void) |
| { |
| global_dirty_log = false; |
| MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse); |
| } |
| |
| static void listener_add_address_space(MemoryListener *listener, |
| AddressSpace *as) |
| { |
| FlatView *view; |
| FlatRange *fr; |
| |
| if (listener->address_space_filter |
| && listener->address_space_filter != as) { |
| return; |
| } |
| |
| 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 = { |
| .mr = fr->mr, |
| .address_space = as, |
| .offset_within_region = fr->offset_in_region, |
| .size = fr->addr.size, |
| .offset_within_address_space = int128_get64(fr->addr.start), |
| .readonly = fr->readonly, |
| }; |
| if (listener->region_add) { |
| listener->region_add(listener, §ion); |
| } |
| } |
| flatview_unref(view); |
| } |
| |
| void memory_listener_register(MemoryListener *listener, AddressSpace *filter) |
| { |
| MemoryListener *other = NULL; |
| AddressSpace *as; |
| |
| listener->address_space_filter = filter; |
| if (QTAILQ_EMPTY(&memory_listeners) |
| || listener->priority >= QTAILQ_LAST(&memory_listeners, |
| 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); |
| } |
| |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| listener_add_address_space(listener, as); |
| } |
| } |
| |
| void memory_listener_unregister(MemoryListener *listener) |
| { |
| QTAILQ_REMOVE(&memory_listeners, listener, link); |
| } |
| |
| void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name) |
| { |
| if (QTAILQ_EMPTY(&address_spaces)) { |
| memory_init(); |
| } |
| |
| memory_region_transaction_begin(); |
| as->root = root; |
| as->current_map = g_new(FlatView, 1); |
| flatview_init(as->current_map); |
| as->ioeventfd_nb = 0; |
| as->ioeventfds = NULL; |
| QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link); |
| as->name = g_strdup(name ? name : "anonymous"); |
| address_space_init_dispatch(as); |
| memory_region_update_pending |= root->enabled; |
| memory_region_transaction_commit(); |
| } |
| |
| void address_space_destroy(AddressSpace *as) |
| { |
| MemoryListener *listener; |
| |
| /* 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); |
| address_space_destroy_dispatch(as); |
| |
| QTAILQ_FOREACH(listener, &memory_listeners, link) { |
| assert(listener->address_space_filter != as); |
| } |
| |
| flatview_unref(as->current_map); |
| g_free(as->name); |
| g_free(as->ioeventfds); |
| } |
| |
| bool io_mem_read(MemoryRegion *mr, hwaddr addr, uint64_t *pval, unsigned size) |
| { |
| return memory_region_dispatch_read(mr, addr, pval, size); |
| } |
| |
| bool io_mem_write(MemoryRegion *mr, hwaddr addr, |
| uint64_t val, unsigned size) |
| { |
| return memory_region_dispatch_write(mr, addr, val, size); |
| } |
| |
| typedef struct MemoryRegionList MemoryRegionList; |
| |
| struct MemoryRegionList { |
| const MemoryRegion *mr; |
| QTAILQ_ENTRY(MemoryRegionList) queue; |
| }; |
| |
| typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead; |
| |
| static void mtree_print_mr(fprintf_function mon_printf, void *f, |
| const MemoryRegion *mr, unsigned int level, |
| hwaddr base, |
| MemoryRegionListHead *alias_print_queue) |
| { |
| MemoryRegionList *new_ml, *ml, *next_ml; |
| MemoryRegionListHead submr_print_queue; |
| const MemoryRegion *submr; |
| unsigned int i; |
| |
| if (!mr || !mr->enabled) { |
| return; |
| } |
| |
| for (i = 0; i < level; i++) { |
| mon_printf(f, " "); |
| } |
| |
| if (mr->alias) { |
| MemoryRegionList *ml; |
| bool found = false; |
| |
| /* check if the alias is already in the queue */ |
| QTAILQ_FOREACH(ml, alias_print_queue, queue) { |
| 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, queue); |
| } |
| mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx |
| " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx |
| "-" TARGET_FMT_plx "\n", |
| base + mr->addr, |
| base + mr->addr |
| + (int128_nz(mr->size) ? |
| (hwaddr)int128_get64(int128_sub(mr->size, |
| int128_one())) : 0), |
| mr->priority, |
| mr->romd_mode ? 'R' : '-', |
| !mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W' |
| : '-', |
| memory_region_name(mr), |
| memory_region_name(mr->alias), |
| mr->alias_offset, |
| mr->alias_offset |
| + (int128_nz(mr->size) ? |
| (hwaddr)int128_get64(int128_sub(mr->size, |
| int128_one())) : 0)); |
| } else { |
| mon_printf(f, |
| TARGET_FMT_plx "-" TARGET_FMT_plx " (prio %d, %c%c): %s\n", |
| base + mr->addr, |
| base + mr->addr |
| + (int128_nz(mr->size) ? |
| (hwaddr)int128_get64(int128_sub(mr->size, |
| int128_one())) : 0), |
| mr->priority, |
| mr->romd_mode ? 'R' : '-', |
| !mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W' |
| : '-', |
| memory_region_name(mr)); |
| } |
| |
| 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, queue) { |
| if (new_ml->mr->addr < ml->mr->addr || |
| (new_ml->mr->addr == ml->mr->addr && |
| new_ml->mr->priority > ml->mr->priority)) { |
| QTAILQ_INSERT_BEFORE(ml, new_ml, queue); |
| new_ml = NULL; |
| break; |
| } |
| } |
| if (new_ml) { |
| QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, queue); |
| } |
| } |
| |
| QTAILQ_FOREACH(ml, &submr_print_queue, queue) { |
| mtree_print_mr(mon_printf, f, ml->mr, level + 1, base + mr->addr, |
| alias_print_queue); |
| } |
| |
| QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, queue, next_ml) { |
| g_free(ml); |
| } |
| } |
| |
| void mtree_info(fprintf_function mon_printf, void *f) |
| { |
| MemoryRegionListHead ml_head; |
| MemoryRegionList *ml, *ml2; |
| AddressSpace *as; |
| |
| QTAILQ_INIT(&ml_head); |
| |
| QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
| mon_printf(f, "%s\n", as->name); |
| mtree_print_mr(mon_printf, f, as->root, 0, 0, &ml_head); |
| } |
| |
| mon_printf(f, "aliases\n"); |
| /* print aliased regions */ |
| QTAILQ_FOREACH(ml, &ml_head, queue) { |
| mon_printf(f, "%s\n", memory_region_name(ml->mr)); |
| mtree_print_mr(mon_printf, f, ml->mr, 0, 0, &ml_head); |
| } |
| |
| QTAILQ_FOREACH_SAFE(ml, &ml_head, queue, ml2) { |
| g_free(ml); |
| } |
| } |
| |
| static const TypeInfo memory_region_info = { |
| .parent = TYPE_OBJECT, |
| .name = TYPE_MEMORY_REGION, |
| .instance_size = sizeof(MemoryRegion), |
| .instance_init = memory_region_initfn, |
| .instance_finalize = memory_region_finalize, |
| }; |
| |
| static void memory_register_types(void) |
| { |
| type_register_static(&memory_region_info); |
| } |
| |
| type_init(memory_register_types) |
