diff options
Diffstat (limited to 'system/memory.c')
| -rw-r--r-- | system/memory.c | 3683 |
1 files changed, 3683 insertions, 0 deletions
diff --git a/system/memory.c b/system/memory.c new file mode 100644 index 0000000000..fa1c99f9ba --- /dev/null +++ b/system/memory.c @@ -0,0 +1,3683 @@ +/* + * 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 "qemu/log.h" +#include "qapi/error.h" +#include "exec/memory.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.h" + +#include "exec/memory-internal.h" +#include "exec/ram_addr.h" +#include "sysemu/kvm.h" +#include "sysemu/runstate.h" +#include "sysemu/tcg.h" +#include "qemu/accel.h" +#include "hw/boards.h" +#include "migration/vmstate.h" +#include "exec/address-spaces.h" + +//#define DEBUG_UNASSIGNED + +static unsigned memory_region_transaction_depth; +static bool memory_region_update_pending; +static bool ioeventfd_update_pending; +unsigned int global_dirty_tracking; + +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) +{ + if (int128_eq(a->addr.start, b->addr.start) && + (!int128_nz(a->addr.size) || !int128_nz(b->addr.size) || + (int128_eq(a->addr.size, b->addr.size) && + (a->match_data == b->match_data) && + ((a->match_data && (a->data == b->data)) || !a->match_data) && + (a->e == b->e)))) + return true; + + return false; +} + +/* 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 qatomic_fetch_inc_nonzero(&view->ref) > 0; +} + +void flatview_unref(FlatView *view) +{ + if (qatomic_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) +{ +#if TARGET_BIG_ENDIAN + 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_name(mr)); + } + 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_name(mr)); + } + 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, + memory_region_name(mr)); + } + 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, + memory_region_name(mr)); + } + 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; + bool reentrancy_guard_applied = false; + + if (!access_size_min) { + access_size_min = 1; + } + if (!access_size_max) { + access_size_max = 4; + } + + /* Do not allow more than one simultaneous access to a device's IO Regions */ + if (mr->dev && !mr->disable_reentrancy_guard && + !mr->ram_device && !mr->ram && !mr->rom_device && !mr->readonly) { + if (mr->dev->mem_reentrancy_guard.engaged_in_io) { + warn_report_once("Blocked re-entrant IO on MemoryRegion: " + "%s at addr: 0x%" HWADDR_PRIX, + memory_region_name(mr), addr); + return MEMTX_ACCESS_ERROR; + } + mr->dev->mem_reentrancy_guard.engaged_in_io = true; + reentrancy_guard_applied = true; + } + + /* 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); + } + } + if (mr->dev && reentrancy_guard_applied) { + mr->dev->mem_reentrancy_guard.engaged_in_io = false; + } + 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); + } +} + +void flatview_for_each_range(FlatView *fv, flatview_cb cb , void *opaque) +{ + FlatRange *fr; + + assert(fv); + assert(cb); + + FOR_EACH_FLAT_RANGE(fr, fv) { + if (cb(fr->addr.start, fr->addr.size, fr->mr, + fr->offset_in_region, opaque)) { + break; + } + } +} + +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; + + if (!as->ioeventfd_notifiers) { + return; + } + + /* + * 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. */ + qatomic_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->dev = (DeviceState *) object_dynamic_cast(mr->owner, TYPE_DEVICE); + 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)); + 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); + char *path = (char *)""; + + 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->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); + op->resolve = memory_region_resolve_container; + + object_property_add_uint64_ptr(OBJECT(mr), "addr", + &mr->addr, OBJ_PROP_FLAG_READ); + object_property_add(OBJECT(mr), "priority", "uint32", + memory_region_get_priority, + NULL, /* memory_region_set_priority */ + NULL, NULL); + object_property_add(OBJECT(mr), "size", "uint64", + memory_region_get_size, + NULL, /* memory_region_set_size, */ + NULL, NULL); +} + +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 " HWADDR_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 " HWADDR_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) +{ + if (mr->ops->valid.accepts + && !mr->ops->valid.accepts(mr->opaque, addr, size, is_write, attrs)) { + qemu_log_mask(LOG_GUEST_ERROR, "Invalid %s at addr 0x%" HWADDR_PRIX + ", size %u, region '%s', reason: rejected\n", + is_write ? "write" : "read", + addr, size, memory_region_name(mr)); + return false; + } + + if (!mr->ops->valid.unaligned && (addr & (size - 1))) { + qemu_log_mask(LOG_GUEST_ERROR, "Invalid %s at addr 0x%" HWADDR_PRIX + ", size %u, region '%s', reason: unaligned\n", + is_write ? "write" : "read", + addr, size, memory_region_name(mr)); + return false; + } + + /* Treat zero as compatibility all valid */ + if (!mr->ops->valid.max_access_size) { + return true; + } + + if (size > mr->ops->valid.max_access_size + || size < mr->ops->valid.min_access_size) { + qemu_log_mask(LOG_GUEST_ERROR, "Invalid %s at addr 0x%" HWADDR_PRIX + ", size %u, region '%s', reason: invalid size " + "(min:%u max:%u)\n", + is_write ? "write" : "read", + addr, size, memory_region_name(mr), + mr->ops->valid.min_access_size, + mr->ops->valid.max_access_size); + 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 (mr->alias) { + return memory_region_dispatch_read(mr->alias, + mr->alias_offset + addr, + pval, op, attrs); + } + 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 (mr->alias) { + return memory_region_dispatch_write(mr->alias, + mr->alias_offset + addr, + data, op, attrs); + } + 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_flags_nomigrate(mr, owner, name, size, 0, errp); +} + +void memory_region_init_ram_flags_nomigrate(MemoryRegion *mr, + Object *owner, + const char *name, + uint64_t size, + uint32_t ram_flags, + 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, ram_flags, mr, &err); + 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); + 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, + Object *owner, + const char *name, + uint64_t size, + uint64_t align, + uint32_t ram_flags, + const char *path, + ram_addr_t offset, + Error **errp) +{ + Error *err = NULL; + memory_region_init(mr, owner, name, size); + mr->ram = true; + mr->readonly = !!(ram_flags & RAM_READONLY); + 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, + offset, &err); + if (err) { + mr->size = int128_zero(); + object_unparent(OBJECT(mr)); + error_propagate(errp, err); + } +} + +void memory_region_init_ram_from_fd(MemoryRegion *mr, + Object *owner, + const char *name, + uint64_t size, + uint32_t ram_flags, + int fd, + ram_addr_t offset, + Error **errp) +{ + Error *err = NULL; + memory_region_init(mr, owner, name, size); + mr->ram = true; + mr->readonly = !!(ram_flags & RAM_READONLY); + mr->terminates = true; + mr->destructor = memory_region_destructor_ram; + mr->ram_block = qemu_ram_alloc_from_fd(size, mr, ram_flags, fd, offset, + &err); + 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; + + /* 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; + + /* 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, + Object *owner, + const char *name, + uint64_t size, + Error **errp) +{ + memory_region_init_ram_flags_nomigrate(mr, owner, name, size, 0, 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, 0, 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 = + g_strdup(object_get_canonical_path_component(OBJECT(mr))); + } + return mr->name; +} + +bool memory_region_is_ram_device(MemoryRegion *mr) +{ + return mr->ram_device; +} + +bool memory_region_is_protected(MemoryRegion *mr) +{ + return mr->ram && (mr->ram_block->flags & RAM_PROTECTED); +} + +uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr) +{ + uint8_t mask = mr->dirty_log_mask; + RAMBlock *rb = mr->ram_block; + + if (global_dirty_tracking && ((rb && qemu_ram_is_migratable(rb)) || + memory_region_is_iommu(mr))) { + mask |= (1 << DIRTY_MEMORY_MIGRATION); + } + + if (tcg_enabled() && rb) { + /* TCG only cares about dirty memory logging for RAM, not IOMMU. */ + mask |= (1 << DIRTY_MEMORY_CODE); + } + 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_iommu_set_page_size_mask(IOMMUMemoryRegion *iommu_mr, + uint64_t page_size_mask, + Error **errp) +{ + IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); + int ret = 0; + + if (imrc->iommu_set_page_size_mask) { + ret = imrc->iommu_set_page_size_mask(iommu_mr, page_size_mask, errp); + } + 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_iommu_one(IOMMUNotifier *notifier, + IOMMUTLBEvent *event) +{ + IOMMUTLBEntry *entry = &event->entry; + hwaddr entry_end = entry->iova + entry->addr_mask; + IOMMUTLBEntry tmp = *entry; + + if (event->type == IOMMU_NOTIFIER_UNMAP) { + assert(entry->perm == IOMMU_NONE); + } + + /* + * Skip the notification if the notification does not overlap + * with registered range. + */ + if (notifier->start > entry_end || notifier->end < entry->iova) { + return; + } + + if (notifier->notifier_flags & IOMMU_NOTIFIER_DEVIOTLB_UNMAP) { + /* Crop (iova, addr_mask) to range */ + tmp.iova = MAX(tmp.iova, notifier->start); + tmp.addr_mask = MIN(entry_end, notifier->end) - tmp.iova; + } else { + assert(entry->iova >= notifier->start && entry_end <= notifier->end); + } + + if (event->type & notifier->notifier_flags) { + notifier->notify(notifier, &tmp); + } +} + +void memory_region_unmap_iommu_notifier_range(IOMMUNotifier *notifier) +{ + IOMMUTLBEvent event; + + event.type = IOMMU_NOTIFIER_UNMAP; + event.entry.target_as = &address_space_memory; + event.entry.iova = notifier->start; + event.entry.perm = IOMMU_NONE; + event.entry.addr_mask = notifier->end - notifier->start; + + memory_region_notify_iommu_one(notifier, &event); +} + +void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr, + int iommu_idx, + IOMMUTLBEvent event) +{ + 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_iommu_one(iommu_notifier, &event); + } + } +} + +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); +} + +RamDiscardManager *memory_region_get_ram_discard_manager(MemoryRegion *mr) +{ + if (!memory_region_is_mapped(mr) || !memory_region_is_ram(mr)) { + return NULL; + } + return mr->rdm; +} + +void memory_region_set_ram_discard_manager(MemoryRegion *mr, + RamDiscardManager *rdm) +{ + g_assert(memory_region_is_ram(mr) && !memory_region_is_mapped(mr)); + g_assert(!rdm || !mr->rdm); + mr->rdm = rdm; +} + +uint64_t ram_discard_manager_get_min_granularity(const RamDiscardManager *rdm, + const MemoryRegion *mr) +{ + RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm); + + g_assert(rdmc->get_min_granularity); + return rdmc->get_min_granularity(rdm, mr); +} + +bool ram_discard_manager_is_populated(const RamDiscardManager *rdm, + const MemoryRegionSection *section) +{ + RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm); + + g_assert(rdmc->is_populated); + return rdmc->is_populated(rdm, section); +} + +int ram_discard_manager_replay_populated(const RamDiscardManager *rdm, + MemoryRegionSection *section, + ReplayRamPopulate replay_fn, + void *opaque) +{ + RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm); + + g_assert(rdmc->replay_populated); + return rdmc->replay_populated(rdm, section, replay_fn, opaque); +} + +void ram_discard_manager_replay_discarded(const RamDiscardManager *rdm, + MemoryRegionSection *section, + ReplayRamDiscard replay_fn, + void *opaque) +{ + RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm); + + g_assert(rdmc->replay_discarded); + rdmc->replay_discarded(rdm, section, replay_fn, opaque); +} + +void ram_discard_manager_register_listener(RamDiscardManager *rdm, + RamDiscardListener *rdl, + MemoryRegionSection *section) +{ + RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm); + + g_assert(rdmc->register_listener); + rdmc->register_listener(rdm, rdl, section); +} + +void ram_discard_manager_unregister_listener(RamDiscardManager *rdm, + RamDiscardListener *rdl) +{ + RamDiscardManagerClass *rdmc = RAM_DISCARD_MANAGER_GET_CLASS(rdm); + + g_assert(rdmc->unregister_listener); + rdmc->unregister_listener(rdm, rdl); +} + +/* Called with rcu_read_lock held. */ +bool memory_get_xlat_addr(IOMMUTLBEntry *iotlb, void **vaddr, + ram_addr_t *ram_addr, bool *read_only, + bool *mr_has_discard_manager) +{ + MemoryRegion *mr; + hwaddr xlat; + hwaddr len = iotlb->addr_mask + 1; + bool writable = iotlb->perm & IOMMU_WO; + + if (mr_has_discard_manager) { + *mr_has_discard_manager = false; + } + /* + * The IOMMU TLB entry we have just covers translation through + * this IOMMU to its immediate target. We need to translate + * it the rest of the way through to memory. + */ + mr = address_space_translate(&address_space_memory, iotlb->translated_addr, + &xlat, &len, writable, MEMTXATTRS_UNSPECIFIED); + if (!memory_region_is_ram(mr)) { + error_report("iommu map to non memory area %" HWADDR_PRIx "", xlat); + return false; + } else if (memory_region_has_ram_discard_manager(mr)) { + RamDiscardManager *rdm = memory_region_get_ram_discard_manager(mr); + MemoryRegionSection tmp = { + .mr = mr, + .offset_within_region = xlat, + .size = int128_make64(len), + }; + if (mr_has_discard_manager) { + *mr_has_discard_manager = true; + } + /* + * Malicious VMs can map memory into the IOMMU, which is expected + * to remain discarded. vfio will pin all pages, populating memory. + * Disallow that. vmstate priorities make sure any RamDiscardManager + * were already restored before IOMMUs are restored. + */ + if (!ram_discard_manager_is_populated(rdm, &tmp)) { + error_report("iommu map to discarded memory (e.g., unplugged via" + " virtio-mem): %" HWADDR_PRIx "", + iotlb->translated_addr); + return false; + } + } + + /* + * Translation truncates length to the IOMMU page size, + * check that it did not truncate too much. + */ + if (len & iotlb->addr_mask) { + error_report("iommu has granularity incompatible with target AS"); + return false; + } + + if (vaddr) { + *vaddr = memory_region_get_ram_ptr(mr) + xlat; + } + + if (ram_addr) { + *ram_addr = memory_region_get_ram_addr(mr) + xlat; + } + + if (read_only) { + *read_only = !writable || mr->readonly; + } + + return true; +} + +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)); +} + +/* + * If memory region `mr' is NULL, do global sync. Otherwise, sync + * dirty bitmap for the specified memory region. + */ +static void memory_region_sync_dirty_bitmap(MemoryRegion *mr, bool last_stage) +{ + 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) { + 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); + trace_memory_region_sync_dirty(mr ? mr->name : "(all)", listener->name, 0); + } else if (listener->log_sync_global) { + /* + * No matter whether MR is specified, what we can do here + * is to do a global sync, because we are not capable to + * sync in a finer granularity. + */ + listener->log_sync_global(listener, last_stage); + trace_memory_region_sync_dirty(mr ? mr->name : "(all)", listener->name, 1); + } + } +} + +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, false); + 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) +{ + RCU_READ_LOCK_GUARD(); + while (mr->alias) { + mr = mr->alias; + } + return mr->ram_block->fd; +} + +void *memory_region_get_ram_ptr(MemoryRegion *mr) +{ + uint64_t offset = 0; + + RCU_READ_LOCK_GUARD(); + while (mr->alias) { + offset += mr->alias_offset; + mr = mr->alias; + } + assert(mr->ram_block); + return qemu_map_ram_ptr(mr->ram_block, offset); +} + +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_msync(MemoryRegion *mr, hwaddr addr, hwaddr size) +{ + if (mr->ram_block) { + qemu_ram_msync(mr->ram_block, addr, size); + } +} + +void memory_region_writeback(MemoryRegion *mr, hwaddr addr, hwaddr size) +{ + /* + * Might be extended case needed to cover + * different types of memory regions + */ + if (mr->dirty_log_mask) { + memory_region_msync(mr, 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; + } +} + +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) +{ + MemoryRegion *alias; + + assert(!subregion->container); + subregion->container = mr; + for (alias = subregion->alias; alias; alias = alias->alias) { + alias->mapped_via_alias++; + } + 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) +{ + MemoryRegion *alias; + + memory_region_transaction_begin(); + assert(subregion->container == mr); + subregion->container = NULL; + for (alias = subregion->alias; alias; alias = alias->alias) { + alias->mapped_via_alias--; + assert(alias->mapped_via_alias >= 0); + } + 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); + memory_region_add_subregion_common(container, mr->addr, 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 || mr->mapped_via_alias; +} + +/* 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; +} + +MemoryRegionSection *memory_region_section_new_copy(MemoryRegionSection *s) +{ + MemoryRegionSection *tmp = g_new(MemoryRegionSection, 1); + + *tmp = *s; + if (tmp->mr) { + memory_region_ref(tmp->mr); + } + if (tmp->fv) { + bool ret = flatview_ref(tmp->fv); + + g_assert(ret); + } + return tmp; +} + +void memory_region_section_free_copy(MemoryRegionSection *s) +{ + if (s->fv) { + flatview_unref(s->fv); + } + if (s->mr) { + memory_region_unref(s->mr); + } + g_free(s); +} + +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(bool last_stage) +{ + memory_region_sync_dirty_bitmap(NULL, last_stage); +} + +void memory_global_after_dirty_log_sync(void) +{ + MEMORY_LISTENER_CALL_GLOBAL(log_global_after_sync, Forward); +} + +/* + * Dirty track stop flags that are postponed due to VM being stopped. Should + * only be used within vmstate_change hook. + */ +static unsigned int postponed_stop_flags; +static VMChangeStateEntry *vmstate_change; +static void memory_global_dirty_log_stop_postponed_run(void); + +void memory_global_dirty_log_start(unsigned int flags) +{ + unsigned int old_flags; + + assert(flags && !(flags & (~GLOBAL_DIRTY_MASK))); + + if (vmstate_change) { + /* If there is postponed stop(), operate on it first */ + postponed_stop_flags &= ~flags; + memory_global_dirty_log_stop_postponed_run(); + } + + flags &= ~global_dirty_tracking; + if (!flags) { + return; + } + + old_flags = global_dirty_tracking; + global_dirty_tracking |= flags; + trace_global_dirty_changed(global_dirty_tracking); + + if (!old_flags) { + MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward); + memory_region_transaction_begin(); + memory_region_update_pending = true; + memory_region_transaction_commit(); + } +} + +static void memory_global_dirty_log_do_stop(unsigned int flags) +{ + assert(flags && !(flags & (~GLOBAL_DIRTY_MASK))); + assert((global_dirty_tracking & flags) == flags); + global_dirty_tracking &= ~flags; + + trace_global_dirty_changed(global_dirty_tracking); + + if (!global_dirty_tracking) { + memory_region_transaction_begin(); + memory_region_update_pending = true; + memory_region_transaction_commit(); + MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse); + } +} + +/* + * Execute the postponed dirty log stop operations if there is, then reset + * everything (including the flags and the vmstate change hook). + */ +static void memory_global_dirty_log_stop_postponed_run(void) +{ + /* This must be called with the vmstate handler registered */ + assert(vmstate_change); + + /* Note: postponed_stop_flags can be cleared in log start routine */ + if (postponed_stop_flags) { + memory_global_dirty_log_do_stop(postponed_stop_flags); + postponed_stop_flags = 0; + } + + qemu_del_vm_change_state_handler(vmstate_change); + vmstate_change = NULL; +} + +static void memory_vm_change_state_handler(void *opaque, bool running, + RunState state) +{ + if (running) { + memory_global_dirty_log_stop_postponed_run(); + } +} + +void memory_global_dirty_log_stop(unsigned int flags) +{ + if (!runstate_is_running()) { + /* Postpone the dirty log stop, e.g., to when VM starts again */ + if (vmstate_change) { + /* Batch with previous postponed flags */ + postponed_stop_flags |= flags; + } else { + postponed_stop_flags = flags; + vmstate_change = qemu_add_vm_change_state_handler( + memory_vm_change_state_handler, NULL); + } + return; + } + + memory_global_dirty_log_do_stop(flags); +} + +static void listener_add_address_space(MemoryListener *listener, + AddressSpace *as) +{ + FlatView *view; + FlatRange *fr; + + if (listener->begin) { + listener->begin(listener); + } + if (global_dirty_tracking) { + 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; + + /* Only one of them can be defined for a listener */ + assert(!(listener->log_sync && listener->log_sync_global)); + + 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); + + if (listener->eventfd_add || listener->eventfd_del) { + as->ioeventfd_notifiers++; + } +} + +void memory_listener_unregister(MemoryListener *listener) +{ + if (!listener->address_space) { + return; + } + + if (listener->eventfd_add || listener->eventfd_del) { + listener->address_space->ioeventfd_notifiers--; + } + + 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 { + char *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, bool display_disabled) +{ + MemoryRegionList *new_ml, *ml, *next_ml; + MemoryRegionListHead submr_print_queue; + const MemoryRegion *submr; + unsigned int i; + hwaddr cur_start, cur_end; + + if (!mr) { + return; + } + + 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) { + 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); + } + if (mr->enabled || display_disabled) { + for (i = 0; i < level; i++) { + qemu_printf(MTREE_INDENT); + } + qemu_printf(HWADDR_FMT_plx "-" HWADDR_FMT_plx + " (prio %d, %s%s): alias %s @%s " HWADDR_FMT_plx + "-" HWADDR_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); + } + qemu_printf("\n"); + } + } else { + if (mr->enabled || display_disabled) { + for (i = 0; i < level; i++) { + qemu_printf(MTREE_INDENT); + } + qemu_printf(HWADDR_FMT_plx "-" HWADDR_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->mr->priority)) { + QTAILQ_INSERT_BEFORE(ml, new_ml, mrqueue); + new_ml = NULL; + break; + } + } + if (new_ml) { + QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, mrqueue); + } + } + + QTAILQ_FOREACH(ml, &submr_print_queue, mrqueue) { + mtree_print_mr(ml->mr, level + 1, cur_start, + alias_print_queue, owner, display_disabled); + } + + QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, mrqueue, next_ml) { + g_free(ml); + } +} + +struct FlatViewInfo { + int counter; + bool dispatch_tree; + bool owner; + AccelClass *ac; +}; + +static void mtree_print_flatview(gpointer key, gpointer value, + gpointer user_data) +{ + FlatView *view = key; + GArray *fv_address_spaces = value; + struct FlatViewInfo *fvi = user_data; + FlatRange *range = &view->ranges[0]; + MemoryRegion *mr; + int n = view->nr; + int i; + AddressSpace *as; + + qemu_printf("FlatView #%d\n", fvi->counter); + ++fvi->counter; + + for (i = 0; i < fv_address_spaces->len; ++i) { + as = g_array_index(fv_address_spaces, AddressSpace*, i); + qemu_printf(" AS \"%s\", root: %s", + as->name, memory_region_name(as->root)); + if (as->root->alias) { + qemu_printf(", alias %s", memory_region_name(as->root->alias)); + } + qemu_printf("\n"); + } + + qemu_printf(" Root memory region: %s\n", + view->root ? memory_region_name(view->root) : "(none)"); + + if (n <= 0) { + qemu_printf(MTREE_INDENT "No rendered FlatView\n\n"); + return; + } + + while (n--) { + mr = range->mr; + if (range->offset_in_region) { + qemu_printf(MTREE_INDENT HWADDR_FMT_plx "-" HWADDR_FMT_plx + " (prio %d, %s%s): %s @" HWADDR_FMT_plx, + int128_get64(range->addr.start), + int128_get64(range->addr.start) + + MR_SIZE(range->addr.size), + mr->priority, + range->nonvolatile ? "nv-" : "", + range->readonly ? "rom" : memory_region_type(mr), + memory_region_name(mr), + range->offset_in_region); + } else { + qemu_printf(MTREE_INDENT HWADDR_FMT_plx "-" HWADDR_FMT_plx + " (prio %d, %s%s): %s", + int128_get64(range->addr.start), + int128_get64(range->addr.start) + + MR_SIZE(range->addr.size), + mr->priority, + range->nonvolatile ? "nv-" : "", + range->readonly ? "rom" : memory_region_type(mr), + memory_region_name(mr)); + } + if (fvi->owner) { + mtree_print_mr_owner(mr); + } + + if (fvi->ac) { + for (i = 0; i < fv_address_spaces->len; ++i) { + as = g_array_index(fv_address_spaces, AddressSpace*, i); + if (fvi->ac->has_memory(current_machine, as, + int128_get64(range->addr.start), + MR_SIZE(range->addr.size) + 1)) { + qemu_printf(" %s", fvi->ac->name); + } + } + } + qemu_printf("\n"); + range++; + } + +#if !defined(CONFIG_USER_ONLY) + if (fvi->dispatch_tree && view->root) { + mtree_print_dispatch(view->dispatch, view->root); + } +#endif + + qemu_printf("\n"); +} + +static gboolean mtree_info_flatview_free(gpointer key, gpointer value, + gpointer user_data) +{ + FlatView *view = key; + GArray *fv_address_spaces = value; + + g_array_unref(fv_address_spaces); + flatview_unref(view); + + return true; +} + +static void mtree_info_flatview(bool dispatch_tree, bool owner) +{ + struct FlatViewInfo fvi = { + .counter = 0, + .dispatch_tree = dispatch_tree, + .owner = owner, + }; + AddressSpace *as; + FlatView *view; + GArray *fv_address_spaces; + GHashTable *views = g_hash_table_new(g_direct_hash, g_direct_equal); + AccelClass *ac = ACCEL_GET_CLASS(current_accel()); + + if (ac->has_memory) { + fvi.ac = ac; + } + + /* Gather all FVs in one table */ + QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { + view = address_space_get_flatview(as); + + fv_address_spaces = g_hash_table_lookup(views, view); + if (!fv_address_spaces) { + fv_address_spaces = g_array_new(false, false, sizeof(as)); + g_hash_table_insert(views, view, fv_address_spaces); + } + + g_array_append_val(fv_address_spaces, as); + } + + /* Print */ + g_hash_table_foreach(views, mtree_print_flatview, &fvi); + + /* Free */ + g_hash_table_foreach_remove(views, mtree_info_flatview_free, 0); + g_hash_table_unref(views); +} + +struct AddressSpaceInfo { + MemoryRegionListHead *ml_head; + bool owner; + bool disabled; +}; + +/* Returns negative value if a < b; zero if a = b; positive value if a > b. */ +static gint address_space_compare_name(gconstpointer a, gconstpointer b) +{ + const AddressSpace *as_a = a; + const AddressSpace *as_b = b; + + return g_strcmp0(as_a->name, as_b->name); +} + +static void mtree_print_as_name(gpointer data, gpointer user_data) +{ + AddressSpace *as = data; + + qemu_printf("address-space: %s\n", as->name); +} + +static void mtree_print_as(gpointer key, gpointer value, gpointer user_data) +{ + MemoryRegion *mr = key; + GSList *as_same_root_mr_list = value; + struct AddressSpaceInfo *asi = user_data; + + g_slist_foreach(as_same_root_mr_list, mtree_print_as_name, NULL); + mtree_print_mr(mr, 1, 0, asi->ml_head, asi->owner, asi->disabled); + qemu_printf("\n"); +} + +static gboolean mtree_info_as_free(gpointer key, gpointer value, + gpointer user_data) +{ + GSList *as_same_root_mr_list = value; + + g_slist_free(as_same_root_mr_list); + + return true; +} + +static void mtree_info_as(bool dispatch_tree, bool owner, bool disabled) +{ + MemoryRegionListHead ml_head; + MemoryRegionList *ml, *ml2; + AddressSpace *as; + GHashTable *views = g_hash_table_new(g_direct_hash, g_direct_equal); + GSList *as_same_root_mr_list; + struct AddressSpaceInfo asi = { + .ml_head = &ml_head, + .owner = owner, + .disabled = disabled, + }; + + QTAILQ_INIT(&ml_head); + + QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { + /* Create hashtable, key=AS root MR, value = list of AS */ + as_same_root_mr_list = g_hash_table_lookup(views, as->root); + as_same_root_mr_list = g_slist_insert_sorted(as_same_root_mr_list, as, + address_space_compare_name); + g_hash_table_insert(views, as->root, as_same_root_mr_list); + } + + /* print address spaces */ + g_hash_table_foreach(views, mtree_print_as, &asi); + g_hash_table_foreach_remove(views, mtree_info_as_free, 0); + g_hash_table_unref(views); + + /* print aliased regions */ + QTAILQ_FOREACH(ml, &ml_head, mrqueue) { + qemu_printf("memory-region: %s\n", memory_region_name(ml->mr)); + mtree_print_mr(ml->mr, 1, 0, &ml_head, owner, disabled); + qemu_printf("\n"); + } + + QTAILQ_FOREACH_SAFE(ml, &ml_head, mrqueue, ml2) { + g_free(ml); + } +} + +void mtree_info(bool flatview, bool dispatch_tree, bool owner, bool disabled) +{ + if (flatview) { + mtree_info_flatview(dispatch_tree, owner); + } else { + mtree_info_as(dispatch_tree, owner, disabled); + } +} + +void memory_region_init_ram(MemoryRegion *mr, + Object *owner, + const char *name, + uint64_t size, + Error **errp) +{ + DeviceState *owner_dev; + Error *err = NULL; + + memory_region_init_ram_nomigrate(mr, owner, name, size, &err); + if (err) { + error_propagate(errp, err); + return; + } + /* This will assert if owner is neither NULL nor a DeviceState. + * We only want the owner here for the purposes of defining a + * unique name for migration. TODO: Ideally we should implement + * a naming scheme for Objects which are not DeviceStates, in + * which case we can relax this restriction. + */ + owner_dev = DEVICE(owner); + vmstate_register_ram(mr, owner_dev); +} + +void memory_region_init_rom(MemoryRegion *mr, + Object *owner, + const char *name, + uint64_t size, + Error **errp) +{ + DeviceState *owner_dev; + Error *err = NULL; + + memory_region_init_rom_nomigrate(mr, owner, name, size, &err); + if (err) { + error_propagate(errp, err); + return; + } + /* This will assert if owner is neither NULL nor a DeviceState. + * We only want the owner here for the purposes of defining a + * unique name for migration. TODO: Ideally we should implement + * a naming scheme for Objects which are not DeviceStates, in + * which case we can relax this restriction. + */ + owner_dev = DEVICE(owner); + vmstate_register_ram(mr, owner_dev); +} + +void memory_region_init_rom_device(MemoryRegion *mr, + Object *owner, + const MemoryRegionOps *ops, + void *opaque, + const char *name, + uint64_t size, + Error **errp) +{ + DeviceState *owner_dev; + Error *err = NULL; + + memory_region_init_rom_device_nomigrate(mr, owner, ops, opaque, + name, size, &err); + if (err) { + error_propagate(errp, err); + return; + } + /* This will assert if owner is neither NULL nor a DeviceState. + * We only want the owner here for the purposes of defining a + * unique name for migration. TODO: Ideally we should implement + * a naming scheme for Objects which are not DeviceStates, in + * which case we can relax this restriction. + */ + owner_dev = DEVICE(owner); + vmstate_register_ram(mr, owner_dev); +} + +/* + * Support system builds with CONFIG_FUZZ using a weak symbol and a stub for + * the fuzz_dma_read_cb callback + */ +#ifdef CONFIG_FUZZ +void __attribute__((weak)) fuzz_dma_read_cb(size_t addr, + size_t len, + MemoryRegion *mr) +{ +} +#endif + +static const TypeInfo memory_region_info = { + .parent = TYPE_OBJECT, + .name = TYPE_MEMORY_REGION, + .class_size = sizeof(MemoryRegionClass), + .instance_size = sizeof(MemoryRegion), + .instance_init = memory_region_initfn, + .instance_finalize = memory_region_finalize, +}; + +static const TypeInfo iommu_memory_region_info = { + .parent = TYPE_MEMORY_REGION, + .name = TYPE_IOMMU_MEMORY_REGION, + .class_size = sizeof(IOMMUMemoryRegionClass), + .instance_size = sizeof(IOMMUMemoryRegion), + .instance_init = iommu_memory_region_initfn, + .abstract = true, +}; + +static const TypeInfo ram_discard_manager_info = { + .parent = TYPE_INTERFACE, + .name = TYPE_RAM_DISCARD_MANAGER, + .class_size = sizeof(RamDiscardManagerClass), +}; + +static void memory_register_types(void) +{ + type_register_static(&memory_region_info); + type_register_static(&iommu_memory_region_info); + type_register_static(&ram_discard_manager_info); +} + +type_init(memory_register_types) |