X-Git-Url: https://git.proxmox.com/?p=mirror_qemu.git;a=blobdiff_plain;f=memory.c;h=480f3d989b4f75014a3d0a9a0f1297e0b64adb32;hp=d7b9bb6951f4f8654209ac1bed4fb7cd3f344e91;hb=HEAD;hpb=f59b31e6d0c69792b5d817c5aa0a6ed64fba42e0 diff --git a/memory.c b/memory.c deleted file mode 100644 index d7b9bb6951..0000000000 --- a/memory.c +++ /dev/null @@ -1,3255 +0,0 @@ -/* - * Physical memory management - * - * Copyright 2011 Red Hat, Inc. and/or its affiliates - * - * Authors: - * Avi Kivity - * - * This work is licensed under the terms of the GNU GPL, version 2. See - * the COPYING file in the top-level directory. - * - * Contributions after 2012-01-13 are licensed under the terms of the - * GNU GPL, version 2 or (at your option) any later version. - */ - -#include "qemu/osdep.h" -#include "qapi/error.h" -#include "cpu.h" -#include "exec/memory.h" -#include "exec/address-spaces.h" -#include "qapi/visitor.h" -#include "qemu/bitops.h" -#include "qemu/error-report.h" -#include "qemu/main-loop.h" -#include "qemu/qemu-print.h" -#include "qom/object.h" -#include "trace-root.h" - -#include "exec/memory-internal.h" -#include "exec/ram_addr.h" -#include "sysemu/kvm.h" -#include "sysemu/runstate.h" -#include "sysemu/tcg.h" -#include "sysemu/accel.h" -#include "hw/boards.h" -#include "migration/vmstate.h" - -//#define DEBUG_UNASSIGNED - -static unsigned memory_region_transaction_depth; -static bool memory_region_update_pending; -static bool ioeventfd_update_pending; -bool global_dirty_log; - -static QTAILQ_HEAD(, MemoryListener) memory_listeners - = QTAILQ_HEAD_INITIALIZER(memory_listeners); - -static QTAILQ_HEAD(, AddressSpace) address_spaces - = QTAILQ_HEAD_INITIALIZER(address_spaces); - -static GHashTable *flat_views; - -typedef struct AddrRange AddrRange; - -/* - * Note that signed integers are needed for negative offsetting in aliases - * (large MemoryRegion::alias_offset). - */ -struct AddrRange { - Int128 start; - Int128 size; -}; - -static AddrRange addrrange_make(Int128 start, Int128 size) -{ - return (AddrRange) { start, size }; -} - -static bool addrrange_equal(AddrRange r1, AddrRange r2) -{ - return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size); -} - -static Int128 addrrange_end(AddrRange r) -{ - return int128_add(r.start, r.size); -} - -static AddrRange addrrange_shift(AddrRange range, Int128 delta) -{ - int128_addto(&range.start, delta); - return range; -} - -static bool addrrange_contains(AddrRange range, Int128 addr) -{ - return int128_ge(addr, range.start) - && int128_lt(addr, addrrange_end(range)); -} - -static bool addrrange_intersects(AddrRange r1, AddrRange r2) -{ - return addrrange_contains(r1, r2.start) - || addrrange_contains(r2, r1.start); -} - -static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2) -{ - Int128 start = int128_max(r1.start, r2.start); - Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2)); - return addrrange_make(start, int128_sub(end, start)); -} - -enum ListenerDirection { Forward, Reverse }; - -#define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \ - do { \ - MemoryListener *_listener; \ - \ - switch (_direction) { \ - case Forward: \ - QTAILQ_FOREACH(_listener, &memory_listeners, link) { \ - if (_listener->_callback) { \ - _listener->_callback(_listener, ##_args); \ - } \ - } \ - break; \ - case Reverse: \ - QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, link) { \ - if (_listener->_callback) { \ - _listener->_callback(_listener, ##_args); \ - } \ - } \ - break; \ - default: \ - abort(); \ - } \ - } while (0) - -#define MEMORY_LISTENER_CALL(_as, _callback, _direction, _section, _args...) \ - do { \ - MemoryListener *_listener; \ - \ - switch (_direction) { \ - case Forward: \ - QTAILQ_FOREACH(_listener, &(_as)->listeners, link_as) { \ - if (_listener->_callback) { \ - _listener->_callback(_listener, _section, ##_args); \ - } \ - } \ - break; \ - case Reverse: \ - QTAILQ_FOREACH_REVERSE(_listener, &(_as)->listeners, link_as) { \ - if (_listener->_callback) { \ - _listener->_callback(_listener, _section, ##_args); \ - } \ - } \ - break; \ - default: \ - abort(); \ - } \ - } while (0) - -/* No need to ref/unref .mr, the FlatRange keeps it alive. */ -#define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback, _args...) \ - do { \ - MemoryRegionSection mrs = section_from_flat_range(fr, \ - address_space_to_flatview(as)); \ - MEMORY_LISTENER_CALL(as, callback, dir, &mrs, ##_args); \ - } while(0) - -struct CoalescedMemoryRange { - AddrRange addr; - QTAILQ_ENTRY(CoalescedMemoryRange) link; -}; - -struct MemoryRegionIoeventfd { - AddrRange addr; - bool match_data; - uint64_t data; - EventNotifier *e; -}; - -static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd *a, - MemoryRegionIoeventfd *b) -{ - if (int128_lt(a->addr.start, b->addr.start)) { - return true; - } else if (int128_gt(a->addr.start, b->addr.start)) { - return false; - } else if (int128_lt(a->addr.size, b->addr.size)) { - return true; - } else if (int128_gt(a->addr.size, b->addr.size)) { - return false; - } else if (a->match_data < b->match_data) { - return true; - } else if (a->match_data > b->match_data) { - return false; - } else if (a->match_data) { - if (a->data < b->data) { - return true; - } else if (a->data > b->data) { - return false; - } - } - if (a->e < b->e) { - return true; - } else if (a->e > b->e) { - return false; - } - return false; -} - -static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd *a, - MemoryRegionIoeventfd *b) -{ - return !memory_region_ioeventfd_before(a, b) - && !memory_region_ioeventfd_before(b, a); -} - -/* Range of memory in the global map. Addresses are absolute. */ -struct FlatRange { - MemoryRegion *mr; - hwaddr offset_in_region; - AddrRange addr; - uint8_t dirty_log_mask; - bool romd_mode; - bool readonly; - bool nonvolatile; -}; - -#define FOR_EACH_FLAT_RANGE(var, view) \ - for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var) - -static inline MemoryRegionSection -section_from_flat_range(FlatRange *fr, FlatView *fv) -{ - return (MemoryRegionSection) { - .mr = fr->mr, - .fv = fv, - .offset_within_region = fr->offset_in_region, - .size = fr->addr.size, - .offset_within_address_space = int128_get64(fr->addr.start), - .readonly = fr->readonly, - .nonvolatile = fr->nonvolatile, - }; -} - -static bool flatrange_equal(FlatRange *a, FlatRange *b) -{ - return a->mr == b->mr - && addrrange_equal(a->addr, b->addr) - && a->offset_in_region == b->offset_in_region - && a->romd_mode == b->romd_mode - && a->readonly == b->readonly - && a->nonvolatile == b->nonvolatile; -} - -static FlatView *flatview_new(MemoryRegion *mr_root) -{ - FlatView *view; - - view = g_new0(FlatView, 1); - view->ref = 1; - view->root = mr_root; - memory_region_ref(mr_root); - trace_flatview_new(view, mr_root); - - return view; -} - -/* Insert a range into a given position. Caller is responsible for maintaining - * sorting order. - */ -static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range) -{ - if (view->nr == view->nr_allocated) { - view->nr_allocated = MAX(2 * view->nr, 10); - view->ranges = g_realloc(view->ranges, - view->nr_allocated * sizeof(*view->ranges)); - } - memmove(view->ranges + pos + 1, view->ranges + pos, - (view->nr - pos) * sizeof(FlatRange)); - view->ranges[pos] = *range; - memory_region_ref(range->mr); - ++view->nr; -} - -static void flatview_destroy(FlatView *view) -{ - int i; - - trace_flatview_destroy(view, view->root); - if (view->dispatch) { - address_space_dispatch_free(view->dispatch); - } - for (i = 0; i < view->nr; i++) { - memory_region_unref(view->ranges[i].mr); - } - g_free(view->ranges); - memory_region_unref(view->root); - g_free(view); -} - -static bool flatview_ref(FlatView *view) -{ - return atomic_fetch_inc_nonzero(&view->ref) > 0; -} - -void flatview_unref(FlatView *view) -{ - if (atomic_fetch_dec(&view->ref) == 1) { - trace_flatview_destroy_rcu(view, view->root); - assert(view->root); - call_rcu(view, flatview_destroy, rcu); - } -} - -static bool can_merge(FlatRange *r1, FlatRange *r2) -{ - return int128_eq(addrrange_end(r1->addr), r2->addr.start) - && r1->mr == r2->mr - && int128_eq(int128_add(int128_make64(r1->offset_in_region), - r1->addr.size), - int128_make64(r2->offset_in_region)) - && r1->dirty_log_mask == r2->dirty_log_mask - && r1->romd_mode == r2->romd_mode - && r1->readonly == r2->readonly - && r1->nonvolatile == r2->nonvolatile; -} - -/* Attempt to simplify a view by merging adjacent ranges */ -static void flatview_simplify(FlatView *view) -{ - unsigned i, j, k; - - i = 0; - while (i < view->nr) { - j = i + 1; - while (j < view->nr - && can_merge(&view->ranges[j-1], &view->ranges[j])) { - int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size); - ++j; - } - ++i; - for (k = i; k < j; k++) { - memory_region_unref(view->ranges[k].mr); - } - memmove(&view->ranges[i], &view->ranges[j], - (view->nr - j) * sizeof(view->ranges[j])); - view->nr -= j - i; - } -} - -static bool memory_region_big_endian(MemoryRegion *mr) -{ -#ifdef TARGET_WORDS_BIGENDIAN - return mr->ops->endianness != DEVICE_LITTLE_ENDIAN; -#else - return mr->ops->endianness == DEVICE_BIG_ENDIAN; -#endif -} - -static void adjust_endianness(MemoryRegion *mr, uint64_t *data, MemOp op) -{ - if ((op & MO_BSWAP) != devend_memop(mr->ops->endianness)) { - switch (op & MO_SIZE) { - case MO_8: - break; - case MO_16: - *data = bswap16(*data); - break; - case MO_32: - *data = bswap32(*data); - break; - case MO_64: - *data = bswap64(*data); - break; - default: - g_assert_not_reached(); - } - } -} - -static inline void memory_region_shift_read_access(uint64_t *value, - signed shift, - uint64_t mask, - uint64_t tmp) -{ - if (shift >= 0) { - *value |= (tmp & mask) << shift; - } else { - *value |= (tmp & mask) >> -shift; - } -} - -static inline uint64_t memory_region_shift_write_access(uint64_t *value, - signed shift, - uint64_t mask) -{ - uint64_t tmp; - - if (shift >= 0) { - tmp = (*value >> shift) & mask; - } else { - tmp = (*value << -shift) & mask; - } - - return tmp; -} - -static hwaddr memory_region_to_absolute_addr(MemoryRegion *mr, hwaddr offset) -{ - MemoryRegion *root; - hwaddr abs_addr = offset; - - abs_addr += mr->addr; - for (root = mr; root->container; ) { - root = root->container; - abs_addr += root->addr; - } - - return abs_addr; -} - -static int get_cpu_index(void) -{ - if (current_cpu) { - return current_cpu->cpu_index; - } - return -1; -} - -static MemTxResult memory_region_read_accessor(MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - signed shift, - uint64_t mask, - MemTxAttrs attrs) -{ - uint64_t tmp; - - tmp = mr->ops->read(mr->opaque, addr, size); - if (mr->subpage) { - trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size); - } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED) { - hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr); - trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size); - } - memory_region_shift_read_access(value, shift, mask, tmp); - return MEMTX_OK; -} - -static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - signed shift, - uint64_t mask, - MemTxAttrs attrs) -{ - uint64_t tmp = 0; - MemTxResult r; - - r = mr->ops->read_with_attrs(mr->opaque, addr, &tmp, size, attrs); - if (mr->subpage) { - trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size); - } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED) { - hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr); - trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size); - } - memory_region_shift_read_access(value, shift, mask, tmp); - return r; -} - -static MemTxResult memory_region_write_accessor(MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - signed shift, - uint64_t mask, - MemTxAttrs attrs) -{ - uint64_t tmp = memory_region_shift_write_access(value, shift, mask); - - if (mr->subpage) { - trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size); - } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED) { - hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr); - trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size); - } - mr->ops->write(mr->opaque, addr, tmp, size); - return MEMTX_OK; -} - -static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - signed shift, - uint64_t mask, - MemTxAttrs attrs) -{ - uint64_t tmp = memory_region_shift_write_access(value, shift, mask); - - if (mr->subpage) { - trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size); - } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED) { - hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr); - trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size); - } - return mr->ops->write_with_attrs(mr->opaque, addr, tmp, size, attrs); -} - -static MemTxResult access_with_adjusted_size(hwaddr addr, - uint64_t *value, - unsigned size, - unsigned access_size_min, - unsigned access_size_max, - MemTxResult (*access_fn) - (MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - signed shift, - uint64_t mask, - MemTxAttrs attrs), - MemoryRegion *mr, - MemTxAttrs attrs) -{ - uint64_t access_mask; - unsigned access_size; - unsigned i; - MemTxResult r = MEMTX_OK; - - if (!access_size_min) { - access_size_min = 1; - } - if (!access_size_max) { - access_size_max = 4; - } - - /* FIXME: support unaligned access? */ - access_size = MAX(MIN(size, access_size_max), access_size_min); - access_mask = MAKE_64BIT_MASK(0, access_size * 8); - if (memory_region_big_endian(mr)) { - for (i = 0; i < size; i += access_size) { - r |= access_fn(mr, addr + i, value, access_size, - (size - access_size - i) * 8, access_mask, attrs); - } - } else { - for (i = 0; i < size; i += access_size) { - r |= access_fn(mr, addr + i, value, access_size, i * 8, - access_mask, attrs); - } - } - return r; -} - -static AddressSpace *memory_region_to_address_space(MemoryRegion *mr) -{ - AddressSpace *as; - - while (mr->container) { - mr = mr->container; - } - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - if (mr == as->root) { - return as; - } - } - return NULL; -} - -/* Render a memory region into the global view. Ranges in @view obscure - * ranges in @mr. - */ -static void render_memory_region(FlatView *view, - MemoryRegion *mr, - Int128 base, - AddrRange clip, - bool readonly, - bool nonvolatile) -{ - MemoryRegion *subregion; - unsigned i; - hwaddr offset_in_region; - Int128 remain; - Int128 now; - FlatRange fr; - AddrRange tmp; - - if (!mr->enabled) { - return; - } - - int128_addto(&base, int128_make64(mr->addr)); - readonly |= mr->readonly; - nonvolatile |= mr->nonvolatile; - - tmp = addrrange_make(base, mr->size); - - if (!addrrange_intersects(tmp, clip)) { - return; - } - - clip = addrrange_intersection(tmp, clip); - - if (mr->alias) { - int128_subfrom(&base, int128_make64(mr->alias->addr)); - int128_subfrom(&base, int128_make64(mr->alias_offset)); - render_memory_region(view, mr->alias, base, clip, - readonly, nonvolatile); - return; - } - - /* Render subregions in priority order. */ - QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) { - render_memory_region(view, subregion, base, clip, - readonly, nonvolatile); - } - - if (!mr->terminates) { - return; - } - - offset_in_region = int128_get64(int128_sub(clip.start, base)); - base = clip.start; - remain = clip.size; - - fr.mr = mr; - fr.dirty_log_mask = memory_region_get_dirty_log_mask(mr); - fr.romd_mode = mr->romd_mode; - fr.readonly = readonly; - fr.nonvolatile = nonvolatile; - - /* Render the region itself into any gaps left by the current view. */ - for (i = 0; i < view->nr && int128_nz(remain); ++i) { - if (int128_ge(base, addrrange_end(view->ranges[i].addr))) { - continue; - } - if (int128_lt(base, view->ranges[i].addr.start)) { - now = int128_min(remain, - int128_sub(view->ranges[i].addr.start, base)); - fr.offset_in_region = offset_in_region; - fr.addr = addrrange_make(base, now); - flatview_insert(view, i, &fr); - ++i; - int128_addto(&base, now); - offset_in_region += int128_get64(now); - int128_subfrom(&remain, now); - } - now = int128_sub(int128_min(int128_add(base, remain), - addrrange_end(view->ranges[i].addr)), - base); - int128_addto(&base, now); - offset_in_region += int128_get64(now); - int128_subfrom(&remain, now); - } - if (int128_nz(remain)) { - fr.offset_in_region = offset_in_region; - fr.addr = addrrange_make(base, remain); - flatview_insert(view, i, &fr); - } -} - -static MemoryRegion *memory_region_get_flatview_root(MemoryRegion *mr) -{ - while (mr->enabled) { - if (mr->alias) { - if (!mr->alias_offset && int128_ge(mr->size, mr->alias->size)) { - /* The alias is included in its entirety. Use it as - * the "real" root, so that we can share more FlatViews. - */ - mr = mr->alias; - continue; - } - } else if (!mr->terminates) { - unsigned int found = 0; - MemoryRegion *child, *next = NULL; - QTAILQ_FOREACH(child, &mr->subregions, subregions_link) { - if (child->enabled) { - if (++found > 1) { - next = NULL; - break; - } - if (!child->addr && int128_ge(mr->size, child->size)) { - /* A child is included in its entirety. If it's the only - * enabled one, use it in the hope of finding an alias down the - * way. This will also let us share FlatViews. - */ - next = child; - } - } - } - if (found == 0) { - return NULL; - } - if (next) { - mr = next; - continue; - } - } - - return mr; - } - - return NULL; -} - -/* Render a memory topology into a list of disjoint absolute ranges. */ -static FlatView *generate_memory_topology(MemoryRegion *mr) -{ - int i; - FlatView *view; - - view = flatview_new(mr); - - if (mr) { - render_memory_region(view, mr, int128_zero(), - addrrange_make(int128_zero(), int128_2_64()), - false, false); - } - flatview_simplify(view); - - view->dispatch = address_space_dispatch_new(view); - for (i = 0; i < view->nr; i++) { - MemoryRegionSection mrs = - section_from_flat_range(&view->ranges[i], view); - flatview_add_to_dispatch(view, &mrs); - } - address_space_dispatch_compact(view->dispatch); - g_hash_table_replace(flat_views, mr, view); - - return view; -} - -static void address_space_add_del_ioeventfds(AddressSpace *as, - MemoryRegionIoeventfd *fds_new, - unsigned fds_new_nb, - MemoryRegionIoeventfd *fds_old, - unsigned fds_old_nb) -{ - unsigned iold, inew; - MemoryRegionIoeventfd *fd; - MemoryRegionSection section; - - /* Generate a symmetric difference of the old and new fd sets, adding - * and deleting as necessary. - */ - - iold = inew = 0; - while (iold < fds_old_nb || inew < fds_new_nb) { - if (iold < fds_old_nb - && (inew == fds_new_nb - || memory_region_ioeventfd_before(&fds_old[iold], - &fds_new[inew]))) { - fd = &fds_old[iold]; - section = (MemoryRegionSection) { - .fv = address_space_to_flatview(as), - .offset_within_address_space = int128_get64(fd->addr.start), - .size = fd->addr.size, - }; - MEMORY_LISTENER_CALL(as, eventfd_del, Forward, §ion, - fd->match_data, fd->data, fd->e); - ++iold; - } else if (inew < fds_new_nb - && (iold == fds_old_nb - || memory_region_ioeventfd_before(&fds_new[inew], - &fds_old[iold]))) { - fd = &fds_new[inew]; - section = (MemoryRegionSection) { - .fv = address_space_to_flatview(as), - .offset_within_address_space = int128_get64(fd->addr.start), - .size = fd->addr.size, - }; - MEMORY_LISTENER_CALL(as, eventfd_add, Reverse, §ion, - fd->match_data, fd->data, fd->e); - ++inew; - } else { - ++iold; - ++inew; - } - } -} - -FlatView *address_space_get_flatview(AddressSpace *as) -{ - FlatView *view; - - RCU_READ_LOCK_GUARD(); - do { - view = address_space_to_flatview(as); - /* If somebody has replaced as->current_map concurrently, - * flatview_ref returns false. - */ - } while (!flatview_ref(view)); - return view; -} - -static void address_space_update_ioeventfds(AddressSpace *as) -{ - FlatView *view; - FlatRange *fr; - unsigned ioeventfd_nb = 0; - MemoryRegionIoeventfd *ioeventfds = NULL; - AddrRange tmp; - unsigned i; - - view = address_space_get_flatview(as); - FOR_EACH_FLAT_RANGE(fr, view) { - for (i = 0; i < fr->mr->ioeventfd_nb; ++i) { - tmp = addrrange_shift(fr->mr->ioeventfds[i].addr, - int128_sub(fr->addr.start, - int128_make64(fr->offset_in_region))); - if (addrrange_intersects(fr->addr, tmp)) { - ++ioeventfd_nb; - ioeventfds = g_realloc(ioeventfds, - ioeventfd_nb * sizeof(*ioeventfds)); - ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i]; - ioeventfds[ioeventfd_nb-1].addr = tmp; - } - } - } - - address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb, - as->ioeventfds, as->ioeventfd_nb); - - g_free(as->ioeventfds); - as->ioeventfds = ioeventfds; - as->ioeventfd_nb = ioeventfd_nb; - flatview_unref(view); -} - -/* - * Notify the memory listeners about the coalesced IO change events of - * range `cmr'. Only the part that has intersection of the specified - * FlatRange will be sent. - */ -static void flat_range_coalesced_io_notify(FlatRange *fr, AddressSpace *as, - CoalescedMemoryRange *cmr, bool add) -{ - AddrRange tmp; - - tmp = addrrange_shift(cmr->addr, - int128_sub(fr->addr.start, - int128_make64(fr->offset_in_region))); - if (!addrrange_intersects(tmp, fr->addr)) { - return; - } - tmp = addrrange_intersection(tmp, fr->addr); - - if (add) { - MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, coalesced_io_add, - int128_get64(tmp.start), - int128_get64(tmp.size)); - } else { - MEMORY_LISTENER_UPDATE_REGION(fr, as, Reverse, coalesced_io_del, - int128_get64(tmp.start), - int128_get64(tmp.size)); - } -} - -static void flat_range_coalesced_io_del(FlatRange *fr, AddressSpace *as) -{ - CoalescedMemoryRange *cmr; - - QTAILQ_FOREACH(cmr, &fr->mr->coalesced, link) { - flat_range_coalesced_io_notify(fr, as, cmr, false); - } -} - -static void flat_range_coalesced_io_add(FlatRange *fr, AddressSpace *as) -{ - MemoryRegion *mr = fr->mr; - CoalescedMemoryRange *cmr; - - if (QTAILQ_EMPTY(&mr->coalesced)) { - return; - } - - QTAILQ_FOREACH(cmr, &mr->coalesced, link) { - flat_range_coalesced_io_notify(fr, as, cmr, true); - } -} - -static void address_space_update_topology_pass(AddressSpace *as, - const FlatView *old_view, - const FlatView *new_view, - bool adding) -{ - unsigned iold, inew; - FlatRange *frold, *frnew; - - /* Generate a symmetric difference of the old and new memory maps. - * Kill ranges in the old map, and instantiate ranges in the new map. - */ - iold = inew = 0; - while (iold < old_view->nr || inew < new_view->nr) { - if (iold < old_view->nr) { - frold = &old_view->ranges[iold]; - } else { - frold = NULL; - } - if (inew < new_view->nr) { - frnew = &new_view->ranges[inew]; - } else { - frnew = NULL; - } - - if (frold - && (!frnew - || int128_lt(frold->addr.start, frnew->addr.start) - || (int128_eq(frold->addr.start, frnew->addr.start) - && !flatrange_equal(frold, frnew)))) { - /* In old but not in new, or in both but attributes changed. */ - - if (!adding) { - flat_range_coalesced_io_del(frold, as); - MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del); - } - - ++iold; - } else if (frold && frnew && flatrange_equal(frold, frnew)) { - /* In both and unchanged (except logging may have changed) */ - - if (adding) { - MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop); - if (frnew->dirty_log_mask & ~frold->dirty_log_mask) { - MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start, - frold->dirty_log_mask, - frnew->dirty_log_mask); - } - if (frold->dirty_log_mask & ~frnew->dirty_log_mask) { - MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop, - frold->dirty_log_mask, - frnew->dirty_log_mask); - } - } - - ++iold; - ++inew; - } else { - /* In new */ - - if (adding) { - MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add); - flat_range_coalesced_io_add(frnew, as); - } - - ++inew; - } - } -} - -static void flatviews_init(void) -{ - static FlatView *empty_view; - - if (flat_views) { - return; - } - - flat_views = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, - (GDestroyNotify) flatview_unref); - if (!empty_view) { - empty_view = generate_memory_topology(NULL); - /* We keep it alive forever in the global variable. */ - flatview_ref(empty_view); - } else { - g_hash_table_replace(flat_views, NULL, empty_view); - flatview_ref(empty_view); - } -} - -static void flatviews_reset(void) -{ - AddressSpace *as; - - if (flat_views) { - g_hash_table_unref(flat_views); - flat_views = NULL; - } - flatviews_init(); - - /* Render unique FVs */ - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - MemoryRegion *physmr = memory_region_get_flatview_root(as->root); - - if (g_hash_table_lookup(flat_views, physmr)) { - continue; - } - - generate_memory_topology(physmr); - } -} - -static void address_space_set_flatview(AddressSpace *as) -{ - FlatView *old_view = address_space_to_flatview(as); - MemoryRegion *physmr = memory_region_get_flatview_root(as->root); - FlatView *new_view = g_hash_table_lookup(flat_views, physmr); - - assert(new_view); - - if (old_view == new_view) { - return; - } - - if (old_view) { - flatview_ref(old_view); - } - - flatview_ref(new_view); - - if (!QTAILQ_EMPTY(&as->listeners)) { - FlatView tmpview = { .nr = 0 }, *old_view2 = old_view; - - if (!old_view2) { - old_view2 = &tmpview; - } - address_space_update_topology_pass(as, old_view2, new_view, false); - address_space_update_topology_pass(as, old_view2, new_view, true); - } - - /* Writes are protected by the BQL. */ - atomic_rcu_set(&as->current_map, new_view); - if (old_view) { - flatview_unref(old_view); - } - - /* Note that all the old MemoryRegions are still alive up to this - * point. This relieves most MemoryListeners from the need to - * ref/unref the MemoryRegions they get---unless they use them - * outside the iothread mutex, in which case precise reference - * counting is necessary. - */ - if (old_view) { - flatview_unref(old_view); - } -} - -static void address_space_update_topology(AddressSpace *as) -{ - MemoryRegion *physmr = memory_region_get_flatview_root(as->root); - - flatviews_init(); - if (!g_hash_table_lookup(flat_views, physmr)) { - generate_memory_topology(physmr); - } - address_space_set_flatview(as); -} - -void memory_region_transaction_begin(void) -{ - qemu_flush_coalesced_mmio_buffer(); - ++memory_region_transaction_depth; -} - -void memory_region_transaction_commit(void) -{ - AddressSpace *as; - - assert(memory_region_transaction_depth); - assert(qemu_mutex_iothread_locked()); - - --memory_region_transaction_depth; - if (!memory_region_transaction_depth) { - if (memory_region_update_pending) { - flatviews_reset(); - - MEMORY_LISTENER_CALL_GLOBAL(begin, Forward); - - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - address_space_set_flatview(as); - address_space_update_ioeventfds(as); - } - memory_region_update_pending = false; - ioeventfd_update_pending = false; - MEMORY_LISTENER_CALL_GLOBAL(commit, Forward); - } else if (ioeventfd_update_pending) { - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - address_space_update_ioeventfds(as); - } - ioeventfd_update_pending = false; - } - } -} - -static void memory_region_destructor_none(MemoryRegion *mr) -{ -} - -static void memory_region_destructor_ram(MemoryRegion *mr) -{ - qemu_ram_free(mr->ram_block); -} - -static bool memory_region_need_escape(char c) -{ - return c == '/' || c == '[' || c == '\\' || c == ']'; -} - -static char *memory_region_escape_name(const char *name) -{ - const char *p; - char *escaped, *q; - uint8_t c; - size_t bytes = 0; - - for (p = name; *p; p++) { - bytes += memory_region_need_escape(*p) ? 4 : 1; - } - if (bytes == p - name) { - return g_memdup(name, bytes + 1); - } - - escaped = g_malloc(bytes + 1); - for (p = name, q = escaped; *p; p++) { - c = *p; - if (unlikely(memory_region_need_escape(c))) { - *q++ = '\\'; - *q++ = 'x'; - *q++ = "0123456789abcdef"[c >> 4]; - c = "0123456789abcdef"[c & 15]; - } - *q++ = c; - } - *q = 0; - return escaped; -} - -static void memory_region_do_init(MemoryRegion *mr, - Object *owner, - const char *name, - uint64_t size) -{ - mr->size = int128_make64(size); - if (size == UINT64_MAX) { - mr->size = int128_2_64(); - } - mr->name = g_strdup(name); - mr->owner = owner; - mr->ram_block = NULL; - - if (name) { - char *escaped_name = memory_region_escape_name(name); - char *name_array = g_strdup_printf("%s[*]", escaped_name); - - if (!owner) { - owner = container_get(qdev_get_machine(), "/unattached"); - } - - object_property_add_child(owner, name_array, OBJECT(mr), &error_abort); - object_unref(OBJECT(mr)); - g_free(name_array); - g_free(escaped_name); - } -} - -void memory_region_init(MemoryRegion *mr, - Object *owner, - const char *name, - uint64_t size) -{ - object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION); - memory_region_do_init(mr, owner, name, size); -} - -static void memory_region_get_addr(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) -{ - MemoryRegion *mr = MEMORY_REGION(obj); - uint64_t value = mr->addr; - - visit_type_uint64(v, name, &value, errp); -} - -static void memory_region_get_container(Object *obj, Visitor *v, - const char *name, void *opaque, - Error **errp) -{ - MemoryRegion *mr = MEMORY_REGION(obj); - gchar *path = (gchar *)""; - - if (mr->container) { - path = object_get_canonical_path(OBJECT(mr->container)); - } - visit_type_str(v, name, &path, errp); - if (mr->container) { - g_free(path); - } -} - -static Object *memory_region_resolve_container(Object *obj, void *opaque, - const char *part) -{ - MemoryRegion *mr = MEMORY_REGION(obj); - - return OBJECT(mr->container); -} - -static void memory_region_get_priority(Object *obj, Visitor *v, - const char *name, void *opaque, - Error **errp) -{ - MemoryRegion *mr = MEMORY_REGION(obj); - int32_t value = mr->priority; - - visit_type_int32(v, name, &value, errp); -} - -static void memory_region_get_size(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) -{ - MemoryRegion *mr = MEMORY_REGION(obj); - uint64_t value = memory_region_size(mr); - - visit_type_uint64(v, name, &value, errp); -} - -static void memory_region_initfn(Object *obj) -{ - MemoryRegion *mr = MEMORY_REGION(obj); - ObjectProperty *op; - - mr->ops = &unassigned_mem_ops; - mr->enabled = true; - mr->romd_mode = true; - mr->global_locking = true; - mr->destructor = memory_region_destructor_none; - QTAILQ_INIT(&mr->subregions); - QTAILQ_INIT(&mr->coalesced); - - op = object_property_add(OBJECT(mr), "container", - "link<" TYPE_MEMORY_REGION ">", - memory_region_get_container, - NULL, /* memory_region_set_container */ - NULL, NULL, &error_abort); - op->resolve = memory_region_resolve_container; - - object_property_add(OBJECT(mr), "addr", "uint64", - memory_region_get_addr, - NULL, /* memory_region_set_addr */ - NULL, NULL, &error_abort); - object_property_add(OBJECT(mr), "priority", "uint32", - memory_region_get_priority, - NULL, /* memory_region_set_priority */ - NULL, NULL, &error_abort); - object_property_add(OBJECT(mr), "size", "uint64", - memory_region_get_size, - NULL, /* memory_region_set_size, */ - NULL, NULL, &error_abort); -} - -static void iommu_memory_region_initfn(Object *obj) -{ - MemoryRegion *mr = MEMORY_REGION(obj); - - mr->is_iommu = true; -} - -static uint64_t unassigned_mem_read(void *opaque, hwaddr addr, - unsigned size) -{ -#ifdef DEBUG_UNASSIGNED - printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); -#endif - return 0; -} - -static void unassigned_mem_write(void *opaque, hwaddr addr, - uint64_t val, unsigned size) -{ -#ifdef DEBUG_UNASSIGNED - printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val); -#endif -} - -static bool unassigned_mem_accepts(void *opaque, hwaddr addr, - unsigned size, bool is_write, - MemTxAttrs attrs) -{ - return false; -} - -const MemoryRegionOps unassigned_mem_ops = { - .valid.accepts = unassigned_mem_accepts, - .endianness = DEVICE_NATIVE_ENDIAN, -}; - -static uint64_t memory_region_ram_device_read(void *opaque, - hwaddr addr, unsigned size) -{ - MemoryRegion *mr = opaque; - uint64_t data = (uint64_t)~0; - - switch (size) { - case 1: - data = *(uint8_t *)(mr->ram_block->host + addr); - break; - case 2: - data = *(uint16_t *)(mr->ram_block->host + addr); - break; - case 4: - data = *(uint32_t *)(mr->ram_block->host + addr); - break; - case 8: - data = *(uint64_t *)(mr->ram_block->host + addr); - break; - } - - trace_memory_region_ram_device_read(get_cpu_index(), mr, addr, data, size); - - return data; -} - -static void memory_region_ram_device_write(void *opaque, hwaddr addr, - uint64_t data, unsigned size) -{ - MemoryRegion *mr = opaque; - - trace_memory_region_ram_device_write(get_cpu_index(), mr, addr, data, size); - - switch (size) { - case 1: - *(uint8_t *)(mr->ram_block->host + addr) = (uint8_t)data; - break; - case 2: - *(uint16_t *)(mr->ram_block->host + addr) = (uint16_t)data; - break; - case 4: - *(uint32_t *)(mr->ram_block->host + addr) = (uint32_t)data; - break; - case 8: - *(uint64_t *)(mr->ram_block->host + addr) = data; - break; - } -} - -static const MemoryRegionOps ram_device_mem_ops = { - .read = memory_region_ram_device_read, - .write = memory_region_ram_device_write, - .endianness = DEVICE_HOST_ENDIAN, - .valid = { - .min_access_size = 1, - .max_access_size = 8, - .unaligned = true, - }, - .impl = { - .min_access_size = 1, - .max_access_size = 8, - .unaligned = true, - }, -}; - -bool memory_region_access_valid(MemoryRegion *mr, - hwaddr addr, - unsigned size, - bool is_write, - MemTxAttrs attrs) -{ - int access_size_min, access_size_max; - int access_size, i; - - if (!mr->ops->valid.unaligned && (addr & (size - 1))) { - return false; - } - - if (!mr->ops->valid.accepts) { - return true; - } - - access_size_min = mr->ops->valid.min_access_size; - if (!mr->ops->valid.min_access_size) { - access_size_min = 1; - } - - access_size_max = mr->ops->valid.max_access_size; - if (!mr->ops->valid.max_access_size) { - access_size_max = 4; - } - - access_size = MAX(MIN(size, access_size_max), access_size_min); - for (i = 0; i < size; i += access_size) { - if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size, - is_write, attrs)) { - return false; - } - } - - return true; -} - -static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr, - hwaddr addr, - uint64_t *pval, - unsigned size, - MemTxAttrs attrs) -{ - *pval = 0; - - if (mr->ops->read) { - return access_with_adjusted_size(addr, pval, size, - mr->ops->impl.min_access_size, - mr->ops->impl.max_access_size, - memory_region_read_accessor, - mr, attrs); - } else { - return access_with_adjusted_size(addr, pval, size, - mr->ops->impl.min_access_size, - mr->ops->impl.max_access_size, - memory_region_read_with_attrs_accessor, - mr, attrs); - } -} - -MemTxResult memory_region_dispatch_read(MemoryRegion *mr, - hwaddr addr, - uint64_t *pval, - MemOp op, - MemTxAttrs attrs) -{ - unsigned size = memop_size(op); - MemTxResult r; - - if (!memory_region_access_valid(mr, addr, size, false, attrs)) { - *pval = unassigned_mem_read(mr, addr, size); - return MEMTX_DECODE_ERROR; - } - - r = memory_region_dispatch_read1(mr, addr, pval, size, attrs); - adjust_endianness(mr, pval, op); - return r; -} - -/* Return true if an eventfd was signalled */ -static bool memory_region_dispatch_write_eventfds(MemoryRegion *mr, - hwaddr addr, - uint64_t data, - unsigned size, - MemTxAttrs attrs) -{ - MemoryRegionIoeventfd ioeventfd = { - .addr = addrrange_make(int128_make64(addr), int128_make64(size)), - .data = data, - }; - unsigned i; - - for (i = 0; i < mr->ioeventfd_nb; i++) { - ioeventfd.match_data = mr->ioeventfds[i].match_data; - ioeventfd.e = mr->ioeventfds[i].e; - - if (memory_region_ioeventfd_equal(&ioeventfd, &mr->ioeventfds[i])) { - event_notifier_set(ioeventfd.e); - return true; - } - } - - return false; -} - -MemTxResult memory_region_dispatch_write(MemoryRegion *mr, - hwaddr addr, - uint64_t data, - MemOp op, - MemTxAttrs attrs) -{ - unsigned size = memop_size(op); - - if (!memory_region_access_valid(mr, addr, size, true, attrs)) { - unassigned_mem_write(mr, addr, data, size); - return MEMTX_DECODE_ERROR; - } - - adjust_endianness(mr, &data, op); - - if ((!kvm_eventfds_enabled()) && - memory_region_dispatch_write_eventfds(mr, addr, data, size, attrs)) { - return MEMTX_OK; - } - - if (mr->ops->write) { - return access_with_adjusted_size(addr, &data, size, - mr->ops->impl.min_access_size, - mr->ops->impl.max_access_size, - memory_region_write_accessor, mr, - attrs); - } else { - return - access_with_adjusted_size(addr, &data, size, - mr->ops->impl.min_access_size, - mr->ops->impl.max_access_size, - memory_region_write_with_attrs_accessor, - mr, attrs); - } -} - -void memory_region_init_io(MemoryRegion *mr, - Object *owner, - const MemoryRegionOps *ops, - void *opaque, - const char *name, - uint64_t size) -{ - memory_region_init(mr, owner, name, size); - mr->ops = ops ? ops : &unassigned_mem_ops; - mr->opaque = opaque; - mr->terminates = true; -} - -void memory_region_init_ram_nomigrate(MemoryRegion *mr, - Object *owner, - const char *name, - uint64_t size, - Error **errp) -{ - memory_region_init_ram_shared_nomigrate(mr, owner, name, size, false, errp); -} - -void memory_region_init_ram_shared_nomigrate(MemoryRegion *mr, - Object *owner, - const char *name, - uint64_t size, - bool share, - Error **errp) -{ - Error *err = NULL; - memory_region_init(mr, owner, name, size); - mr->ram = true; - mr->terminates = true; - mr->destructor = memory_region_destructor_ram; - mr->ram_block = qemu_ram_alloc(size, share, mr, &err); - mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; - if (err) { - mr->size = int128_zero(); - object_unparent(OBJECT(mr)); - error_propagate(errp, err); - } -} - -void memory_region_init_resizeable_ram(MemoryRegion *mr, - Object *owner, - const char *name, - uint64_t size, - uint64_t max_size, - void (*resized)(const char*, - uint64_t length, - void *host), - Error **errp) -{ - Error *err = NULL; - memory_region_init(mr, owner, name, size); - mr->ram = true; - mr->terminates = true; - mr->destructor = memory_region_destructor_ram; - mr->ram_block = qemu_ram_alloc_resizeable(size, max_size, resized, - mr, &err); - mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; - if (err) { - mr->size = int128_zero(); - object_unparent(OBJECT(mr)); - error_propagate(errp, err); - } -} - -#ifdef CONFIG_POSIX -void memory_region_init_ram_from_file(MemoryRegion *mr, - struct Object *owner, - const char *name, - uint64_t size, - uint64_t align, - uint32_t ram_flags, - const char *path, - Error **errp) -{ - Error *err = NULL; - memory_region_init(mr, owner, name, size); - mr->ram = true; - mr->terminates = true; - mr->destructor = memory_region_destructor_ram; - mr->align = align; - mr->ram_block = qemu_ram_alloc_from_file(size, mr, ram_flags, path, &err); - mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; - if (err) { - mr->size = int128_zero(); - object_unparent(OBJECT(mr)); - error_propagate(errp, err); - } -} - -void memory_region_init_ram_from_fd(MemoryRegion *mr, - struct Object *owner, - const char *name, - uint64_t size, - bool share, - int fd, - Error **errp) -{ - Error *err = NULL; - memory_region_init(mr, owner, name, size); - mr->ram = true; - mr->terminates = true; - mr->destructor = memory_region_destructor_ram; - mr->ram_block = qemu_ram_alloc_from_fd(size, mr, - share ? RAM_SHARED : 0, - fd, &err); - mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; - if (err) { - mr->size = int128_zero(); - object_unparent(OBJECT(mr)); - error_propagate(errp, err); - } -} -#endif - -void memory_region_init_ram_ptr(MemoryRegion *mr, - Object *owner, - const char *name, - uint64_t size, - void *ptr) -{ - memory_region_init(mr, owner, name, size); - mr->ram = true; - mr->terminates = true; - mr->destructor = memory_region_destructor_ram; - mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; - - /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */ - assert(ptr != NULL); - mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal); -} - -void memory_region_init_ram_device_ptr(MemoryRegion *mr, - Object *owner, - const char *name, - uint64_t size, - void *ptr) -{ - memory_region_init(mr, owner, name, size); - mr->ram = true; - mr->terminates = true; - mr->ram_device = true; - mr->ops = &ram_device_mem_ops; - mr->opaque = mr; - mr->destructor = memory_region_destructor_ram; - mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; - /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */ - assert(ptr != NULL); - mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal); -} - -void memory_region_init_alias(MemoryRegion *mr, - Object *owner, - const char *name, - MemoryRegion *orig, - hwaddr offset, - uint64_t size) -{ - memory_region_init(mr, owner, name, size); - mr->alias = orig; - mr->alias_offset = offset; -} - -void memory_region_init_rom_nomigrate(MemoryRegion *mr, - struct Object *owner, - const char *name, - uint64_t size, - Error **errp) -{ - Error *err = NULL; - memory_region_init(mr, owner, name, size); - mr->ram = true; - mr->readonly = true; - mr->terminates = true; - mr->destructor = memory_region_destructor_ram; - mr->ram_block = qemu_ram_alloc(size, false, mr, &err); - mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; - if (err) { - mr->size = int128_zero(); - object_unparent(OBJECT(mr)); - error_propagate(errp, err); - } -} - -void memory_region_init_rom_device_nomigrate(MemoryRegion *mr, - Object *owner, - const MemoryRegionOps *ops, - void *opaque, - const char *name, - uint64_t size, - Error **errp) -{ - Error *err = NULL; - assert(ops); - memory_region_init(mr, owner, name, size); - mr->ops = ops; - mr->opaque = opaque; - mr->terminates = true; - mr->rom_device = true; - mr->destructor = memory_region_destructor_ram; - mr->ram_block = qemu_ram_alloc(size, false, mr, &err); - if (err) { - mr->size = int128_zero(); - object_unparent(OBJECT(mr)); - error_propagate(errp, err); - } -} - -void memory_region_init_iommu(void *_iommu_mr, - size_t instance_size, - const char *mrtypename, - Object *owner, - const char *name, - uint64_t size) -{ - struct IOMMUMemoryRegion *iommu_mr; - struct MemoryRegion *mr; - - object_initialize(_iommu_mr, instance_size, mrtypename); - mr = MEMORY_REGION(_iommu_mr); - memory_region_do_init(mr, owner, name, size); - iommu_mr = IOMMU_MEMORY_REGION(mr); - mr->terminates = true; /* then re-forwards */ - QLIST_INIT(&iommu_mr->iommu_notify); - iommu_mr->iommu_notify_flags = IOMMU_NOTIFIER_NONE; -} - -static void memory_region_finalize(Object *obj) -{ - MemoryRegion *mr = MEMORY_REGION(obj); - - assert(!mr->container); - - /* We know the region is not visible in any address space (it - * does not have a container and cannot be a root either because - * it has no references, so we can blindly clear mr->enabled. - * memory_region_set_enabled instead could trigger a transaction - * and cause an infinite loop. - */ - mr->enabled = false; - memory_region_transaction_begin(); - while (!QTAILQ_EMPTY(&mr->subregions)) { - MemoryRegion *subregion = QTAILQ_FIRST(&mr->subregions); - memory_region_del_subregion(mr, subregion); - } - memory_region_transaction_commit(); - - mr->destructor(mr); - memory_region_clear_coalescing(mr); - g_free((char *)mr->name); - g_free(mr->ioeventfds); -} - -Object *memory_region_owner(MemoryRegion *mr) -{ - Object *obj = OBJECT(mr); - return obj->parent; -} - -void memory_region_ref(MemoryRegion *mr) -{ - /* MMIO callbacks most likely will access data that belongs - * to the owner, hence the need to ref/unref the owner whenever - * the memory region is in use. - * - * The memory region is a child of its owner. As long as the - * owner doesn't call unparent itself on the memory region, - * ref-ing the owner will also keep the memory region alive. - * Memory regions without an owner are supposed to never go away; - * we do not ref/unref them because it slows down DMA sensibly. - */ - if (mr && mr->owner) { - object_ref(mr->owner); - } -} - -void memory_region_unref(MemoryRegion *mr) -{ - if (mr && mr->owner) { - object_unref(mr->owner); - } -} - -uint64_t memory_region_size(MemoryRegion *mr) -{ - if (int128_eq(mr->size, int128_2_64())) { - return UINT64_MAX; - } - return int128_get64(mr->size); -} - -const char *memory_region_name(const MemoryRegion *mr) -{ - if (!mr->name) { - ((MemoryRegion *)mr)->name = - object_get_canonical_path_component(OBJECT(mr)); - } - return mr->name; -} - -bool memory_region_is_ram_device(MemoryRegion *mr) -{ - return mr->ram_device; -} - -uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr) -{ - uint8_t mask = mr->dirty_log_mask; - if (global_dirty_log && mr->ram_block) { - mask |= (1 << DIRTY_MEMORY_MIGRATION); - } - return mask; -} - -bool memory_region_is_logging(MemoryRegion *mr, uint8_t client) -{ - return memory_region_get_dirty_log_mask(mr) & (1 << client); -} - -static int memory_region_update_iommu_notify_flags(IOMMUMemoryRegion *iommu_mr, - Error **errp) -{ - IOMMUNotifierFlag flags = IOMMU_NOTIFIER_NONE; - IOMMUNotifier *iommu_notifier; - IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); - int ret = 0; - - IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) { - flags |= iommu_notifier->notifier_flags; - } - - if (flags != iommu_mr->iommu_notify_flags && imrc->notify_flag_changed) { - ret = imrc->notify_flag_changed(iommu_mr, - iommu_mr->iommu_notify_flags, - flags, errp); - } - - if (!ret) { - iommu_mr->iommu_notify_flags = flags; - } - return ret; -} - -int memory_region_register_iommu_notifier(MemoryRegion *mr, - IOMMUNotifier *n, Error **errp) -{ - IOMMUMemoryRegion *iommu_mr; - int ret; - - if (mr->alias) { - return memory_region_register_iommu_notifier(mr->alias, n, errp); - } - - /* We need to register for at least one bitfield */ - iommu_mr = IOMMU_MEMORY_REGION(mr); - assert(n->notifier_flags != IOMMU_NOTIFIER_NONE); - assert(n->start <= n->end); - assert(n->iommu_idx >= 0 && - n->iommu_idx < memory_region_iommu_num_indexes(iommu_mr)); - - QLIST_INSERT_HEAD(&iommu_mr->iommu_notify, n, node); - ret = memory_region_update_iommu_notify_flags(iommu_mr, errp); - if (ret) { - QLIST_REMOVE(n, node); - } - return ret; -} - -uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion *iommu_mr) -{ - IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); - - if (imrc->get_min_page_size) { - return imrc->get_min_page_size(iommu_mr); - } - return TARGET_PAGE_SIZE; -} - -void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n) -{ - MemoryRegion *mr = MEMORY_REGION(iommu_mr); - IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); - hwaddr addr, granularity; - IOMMUTLBEntry iotlb; - - /* If the IOMMU has its own replay callback, override */ - if (imrc->replay) { - imrc->replay(iommu_mr, n); - return; - } - - granularity = memory_region_iommu_get_min_page_size(iommu_mr); - - for (addr = 0; addr < memory_region_size(mr); addr += granularity) { - iotlb = imrc->translate(iommu_mr, addr, IOMMU_NONE, n->iommu_idx); - if (iotlb.perm != IOMMU_NONE) { - n->notify(n, &iotlb); - } - - /* if (2^64 - MR size) < granularity, it's possible to get an - * infinite loop here. This should catch such a wraparound */ - if ((addr + granularity) < addr) { - break; - } - } -} - -void memory_region_unregister_iommu_notifier(MemoryRegion *mr, - IOMMUNotifier *n) -{ - IOMMUMemoryRegion *iommu_mr; - - if (mr->alias) { - memory_region_unregister_iommu_notifier(mr->alias, n); - return; - } - QLIST_REMOVE(n, node); - iommu_mr = IOMMU_MEMORY_REGION(mr); - memory_region_update_iommu_notify_flags(iommu_mr, NULL); -} - -void memory_region_notify_one(IOMMUNotifier *notifier, - IOMMUTLBEntry *entry) -{ - IOMMUNotifierFlag request_flags; - hwaddr entry_end = entry->iova + entry->addr_mask; - - /* - * Skip the notification if the notification does not overlap - * with registered range. - */ - if (notifier->start > entry_end || notifier->end < entry->iova) { - return; - } - - assert(entry->iova >= notifier->start && entry_end <= notifier->end); - - if (entry->perm & IOMMU_RW) { - request_flags = IOMMU_NOTIFIER_MAP; - } else { - request_flags = IOMMU_NOTIFIER_UNMAP; - } - - if (notifier->notifier_flags & request_flags) { - notifier->notify(notifier, entry); - } -} - -void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr, - int iommu_idx, - IOMMUTLBEntry entry) -{ - IOMMUNotifier *iommu_notifier; - - assert(memory_region_is_iommu(MEMORY_REGION(iommu_mr))); - - IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) { - if (iommu_notifier->iommu_idx == iommu_idx) { - memory_region_notify_one(iommu_notifier, &entry); - } - } -} - -int memory_region_iommu_get_attr(IOMMUMemoryRegion *iommu_mr, - enum IOMMUMemoryRegionAttr attr, - void *data) -{ - IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); - - if (!imrc->get_attr) { - return -EINVAL; - } - - return imrc->get_attr(iommu_mr, attr, data); -} - -int memory_region_iommu_attrs_to_index(IOMMUMemoryRegion *iommu_mr, - MemTxAttrs attrs) -{ - IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); - - if (!imrc->attrs_to_index) { - return 0; - } - - return imrc->attrs_to_index(iommu_mr, attrs); -} - -int memory_region_iommu_num_indexes(IOMMUMemoryRegion *iommu_mr) -{ - IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); - - if (!imrc->num_indexes) { - return 1; - } - - return imrc->num_indexes(iommu_mr); -} - -void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client) -{ - uint8_t mask = 1 << client; - uint8_t old_logging; - - assert(client == DIRTY_MEMORY_VGA); - old_logging = mr->vga_logging_count; - mr->vga_logging_count += log ? 1 : -1; - if (!!old_logging == !!mr->vga_logging_count) { - return; - } - - memory_region_transaction_begin(); - mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask); - memory_region_update_pending |= mr->enabled; - memory_region_transaction_commit(); -} - -void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr, - hwaddr size) -{ - assert(mr->ram_block); - cpu_physical_memory_set_dirty_range(memory_region_get_ram_addr(mr) + addr, - size, - memory_region_get_dirty_log_mask(mr)); -} - -static void memory_region_sync_dirty_bitmap(MemoryRegion *mr) -{ - MemoryListener *listener; - AddressSpace *as; - FlatView *view; - FlatRange *fr; - - /* If the same address space has multiple log_sync listeners, we - * visit that address space's FlatView multiple times. But because - * log_sync listeners are rare, it's still cheaper than walking each - * address space once. - */ - QTAILQ_FOREACH(listener, &memory_listeners, link) { - if (!listener->log_sync) { - continue; - } - as = listener->address_space; - view = address_space_get_flatview(as); - FOR_EACH_FLAT_RANGE(fr, view) { - if (fr->dirty_log_mask && (!mr || fr->mr == mr)) { - MemoryRegionSection mrs = section_from_flat_range(fr, view); - listener->log_sync(listener, &mrs); - } - } - flatview_unref(view); - } -} - -void memory_region_clear_dirty_bitmap(MemoryRegion *mr, hwaddr start, - hwaddr len) -{ - MemoryRegionSection mrs; - MemoryListener *listener; - AddressSpace *as; - FlatView *view; - FlatRange *fr; - hwaddr sec_start, sec_end, sec_size; - - QTAILQ_FOREACH(listener, &memory_listeners, link) { - if (!listener->log_clear) { - continue; - } - as = listener->address_space; - view = address_space_get_flatview(as); - FOR_EACH_FLAT_RANGE(fr, view) { - if (!fr->dirty_log_mask || fr->mr != mr) { - /* - * Clear dirty bitmap operation only applies to those - * regions whose dirty logging is at least enabled - */ - continue; - } - - mrs = section_from_flat_range(fr, view); - - sec_start = MAX(mrs.offset_within_region, start); - sec_end = mrs.offset_within_region + int128_get64(mrs.size); - sec_end = MIN(sec_end, start + len); - - if (sec_start >= sec_end) { - /* - * If this memory region section has no intersection - * with the requested range, skip. - */ - continue; - } - - /* Valid case; shrink the section if needed */ - mrs.offset_within_address_space += - sec_start - mrs.offset_within_region; - mrs.offset_within_region = sec_start; - sec_size = sec_end - sec_start; - mrs.size = int128_make64(sec_size); - listener->log_clear(listener, &mrs); - } - flatview_unref(view); - } -} - -DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr, - hwaddr addr, - hwaddr size, - unsigned client) -{ - DirtyBitmapSnapshot *snapshot; - assert(mr->ram_block); - memory_region_sync_dirty_bitmap(mr); - snapshot = cpu_physical_memory_snapshot_and_clear_dirty(mr, addr, size, client); - memory_global_after_dirty_log_sync(); - return snapshot; -} - -bool memory_region_snapshot_get_dirty(MemoryRegion *mr, DirtyBitmapSnapshot *snap, - hwaddr addr, hwaddr size) -{ - assert(mr->ram_block); - return cpu_physical_memory_snapshot_get_dirty(snap, - memory_region_get_ram_addr(mr) + addr, size); -} - -void memory_region_set_readonly(MemoryRegion *mr, bool readonly) -{ - if (mr->readonly != readonly) { - memory_region_transaction_begin(); - mr->readonly = readonly; - memory_region_update_pending |= mr->enabled; - memory_region_transaction_commit(); - } -} - -void memory_region_set_nonvolatile(MemoryRegion *mr, bool nonvolatile) -{ - if (mr->nonvolatile != nonvolatile) { - memory_region_transaction_begin(); - mr->nonvolatile = nonvolatile; - memory_region_update_pending |= mr->enabled; - memory_region_transaction_commit(); - } -} - -void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode) -{ - if (mr->romd_mode != romd_mode) { - memory_region_transaction_begin(); - mr->romd_mode = romd_mode; - memory_region_update_pending |= mr->enabled; - memory_region_transaction_commit(); - } -} - -void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr, - hwaddr size, unsigned client) -{ - assert(mr->ram_block); - cpu_physical_memory_test_and_clear_dirty( - memory_region_get_ram_addr(mr) + addr, size, client); -} - -int memory_region_get_fd(MemoryRegion *mr) -{ - int fd; - - RCU_READ_LOCK_GUARD(); - while (mr->alias) { - mr = mr->alias; - } - fd = mr->ram_block->fd; - - return fd; -} - -void *memory_region_get_ram_ptr(MemoryRegion *mr) -{ - void *ptr; - uint64_t offset = 0; - - RCU_READ_LOCK_GUARD(); - while (mr->alias) { - offset += mr->alias_offset; - mr = mr->alias; - } - assert(mr->ram_block); - ptr = qemu_map_ram_ptr(mr->ram_block, offset); - - return ptr; -} - -MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset) -{ - RAMBlock *block; - - block = qemu_ram_block_from_host(ptr, false, offset); - if (!block) { - return NULL; - } - - return block->mr; -} - -ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr) -{ - return mr->ram_block ? mr->ram_block->offset : RAM_ADDR_INVALID; -} - -void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, Error **errp) -{ - assert(mr->ram_block); - - qemu_ram_resize(mr->ram_block, newsize, errp); -} - - -void memory_region_do_writeback(MemoryRegion *mr, hwaddr addr, hwaddr size) -{ - /* - * Might be extended case needed to cover - * different types of memory regions - */ - if (mr->ram_block && mr->dirty_log_mask) { - qemu_ram_writeback(mr->ram_block, addr, size); - } -} - -/* - * Call proper memory listeners about the change on the newly - * added/removed CoalescedMemoryRange. - */ -static void memory_region_update_coalesced_range(MemoryRegion *mr, - CoalescedMemoryRange *cmr, - bool add) -{ - AddressSpace *as; - FlatView *view; - FlatRange *fr; - - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - view = address_space_get_flatview(as); - FOR_EACH_FLAT_RANGE(fr, view) { - if (fr->mr == mr) { - flat_range_coalesced_io_notify(fr, as, cmr, add); - } - } - flatview_unref(view); - } -} - -void memory_region_set_coalescing(MemoryRegion *mr) -{ - memory_region_clear_coalescing(mr); - memory_region_add_coalescing(mr, 0, int128_get64(mr->size)); -} - -void memory_region_add_coalescing(MemoryRegion *mr, - hwaddr offset, - uint64_t size) -{ - CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr)); - - cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size)); - QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link); - memory_region_update_coalesced_range(mr, cmr, true); - memory_region_set_flush_coalesced(mr); -} - -void memory_region_clear_coalescing(MemoryRegion *mr) -{ - CoalescedMemoryRange *cmr; - - if (QTAILQ_EMPTY(&mr->coalesced)) { - return; - } - - qemu_flush_coalesced_mmio_buffer(); - mr->flush_coalesced_mmio = false; - - while (!QTAILQ_EMPTY(&mr->coalesced)) { - cmr = QTAILQ_FIRST(&mr->coalesced); - QTAILQ_REMOVE(&mr->coalesced, cmr, link); - memory_region_update_coalesced_range(mr, cmr, false); - g_free(cmr); - } -} - -void memory_region_set_flush_coalesced(MemoryRegion *mr) -{ - mr->flush_coalesced_mmio = true; -} - -void memory_region_clear_flush_coalesced(MemoryRegion *mr) -{ - qemu_flush_coalesced_mmio_buffer(); - if (QTAILQ_EMPTY(&mr->coalesced)) { - mr->flush_coalesced_mmio = false; - } -} - -void memory_region_clear_global_locking(MemoryRegion *mr) -{ - mr->global_locking = false; -} - -static bool userspace_eventfd_warning; - -void memory_region_add_eventfd(MemoryRegion *mr, - hwaddr addr, - unsigned size, - bool match_data, - uint64_t data, - EventNotifier *e) -{ - MemoryRegionIoeventfd mrfd = { - .addr.start = int128_make64(addr), - .addr.size = int128_make64(size), - .match_data = match_data, - .data = data, - .e = e, - }; - unsigned i; - - if (kvm_enabled() && (!(kvm_eventfds_enabled() || - userspace_eventfd_warning))) { - userspace_eventfd_warning = true; - error_report("Using eventfd without MMIO binding in KVM. " - "Suboptimal performance expected"); - } - - if (size) { - adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE); - } - memory_region_transaction_begin(); - for (i = 0; i < mr->ioeventfd_nb; ++i) { - if (memory_region_ioeventfd_before(&mrfd, &mr->ioeventfds[i])) { - break; - } - } - ++mr->ioeventfd_nb; - mr->ioeventfds = g_realloc(mr->ioeventfds, - sizeof(*mr->ioeventfds) * mr->ioeventfd_nb); - memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i], - sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i)); - mr->ioeventfds[i] = mrfd; - ioeventfd_update_pending |= mr->enabled; - memory_region_transaction_commit(); -} - -void memory_region_del_eventfd(MemoryRegion *mr, - hwaddr addr, - unsigned size, - bool match_data, - uint64_t data, - EventNotifier *e) -{ - MemoryRegionIoeventfd mrfd = { - .addr.start = int128_make64(addr), - .addr.size = int128_make64(size), - .match_data = match_data, - .data = data, - .e = e, - }; - unsigned i; - - if (size) { - adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE); - } - memory_region_transaction_begin(); - for (i = 0; i < mr->ioeventfd_nb; ++i) { - if (memory_region_ioeventfd_equal(&mrfd, &mr->ioeventfds[i])) { - break; - } - } - assert(i != mr->ioeventfd_nb); - memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1], - sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1))); - --mr->ioeventfd_nb; - mr->ioeventfds = g_realloc(mr->ioeventfds, - sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1); - ioeventfd_update_pending |= mr->enabled; - memory_region_transaction_commit(); -} - -static void memory_region_update_container_subregions(MemoryRegion *subregion) -{ - MemoryRegion *mr = subregion->container; - MemoryRegion *other; - - memory_region_transaction_begin(); - - memory_region_ref(subregion); - QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { - if (subregion->priority >= other->priority) { - QTAILQ_INSERT_BEFORE(other, subregion, subregions_link); - goto done; - } - } - QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link); -done: - memory_region_update_pending |= mr->enabled && subregion->enabled; - memory_region_transaction_commit(); -} - -static void memory_region_add_subregion_common(MemoryRegion *mr, - hwaddr offset, - MemoryRegion *subregion) -{ - assert(!subregion->container); - subregion->container = mr; - subregion->addr = offset; - memory_region_update_container_subregions(subregion); -} - -void memory_region_add_subregion(MemoryRegion *mr, - hwaddr offset, - MemoryRegion *subregion) -{ - subregion->priority = 0; - memory_region_add_subregion_common(mr, offset, subregion); -} - -void memory_region_add_subregion_overlap(MemoryRegion *mr, - hwaddr offset, - MemoryRegion *subregion, - int priority) -{ - subregion->priority = priority; - memory_region_add_subregion_common(mr, offset, subregion); -} - -void memory_region_del_subregion(MemoryRegion *mr, - MemoryRegion *subregion) -{ - memory_region_transaction_begin(); - assert(subregion->container == mr); - subregion->container = NULL; - QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link); - memory_region_unref(subregion); - memory_region_update_pending |= mr->enabled && subregion->enabled; - memory_region_transaction_commit(); -} - -void memory_region_set_enabled(MemoryRegion *mr, bool enabled) -{ - if (enabled == mr->enabled) { - return; - } - memory_region_transaction_begin(); - mr->enabled = enabled; - memory_region_update_pending = true; - memory_region_transaction_commit(); -} - -void memory_region_set_size(MemoryRegion *mr, uint64_t size) -{ - Int128 s = int128_make64(size); - - if (size == UINT64_MAX) { - s = int128_2_64(); - } - if (int128_eq(s, mr->size)) { - return; - } - memory_region_transaction_begin(); - mr->size = s; - memory_region_update_pending = true; - memory_region_transaction_commit(); -} - -static void memory_region_readd_subregion(MemoryRegion *mr) -{ - MemoryRegion *container = mr->container; - - if (container) { - memory_region_transaction_begin(); - memory_region_ref(mr); - memory_region_del_subregion(container, mr); - mr->container = container; - memory_region_update_container_subregions(mr); - memory_region_unref(mr); - memory_region_transaction_commit(); - } -} - -void memory_region_set_address(MemoryRegion *mr, hwaddr addr) -{ - if (addr != mr->addr) { - mr->addr = addr; - memory_region_readd_subregion(mr); - } -} - -void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset) -{ - assert(mr->alias); - - if (offset == mr->alias_offset) { - return; - } - - memory_region_transaction_begin(); - mr->alias_offset = offset; - memory_region_update_pending |= mr->enabled; - memory_region_transaction_commit(); -} - -uint64_t memory_region_get_alignment(const MemoryRegion *mr) -{ - return mr->align; -} - -static int cmp_flatrange_addr(const void *addr_, const void *fr_) -{ - const AddrRange *addr = addr_; - const FlatRange *fr = fr_; - - if (int128_le(addrrange_end(*addr), fr->addr.start)) { - return -1; - } else if (int128_ge(addr->start, addrrange_end(fr->addr))) { - return 1; - } - return 0; -} - -static FlatRange *flatview_lookup(FlatView *view, AddrRange addr) -{ - return bsearch(&addr, view->ranges, view->nr, - sizeof(FlatRange), cmp_flatrange_addr); -} - -bool memory_region_is_mapped(MemoryRegion *mr) -{ - return mr->container ? true : false; -} - -/* Same as memory_region_find, but it does not add a reference to the - * returned region. It must be called from an RCU critical section. - */ -static MemoryRegionSection memory_region_find_rcu(MemoryRegion *mr, - hwaddr addr, uint64_t size) -{ - MemoryRegionSection ret = { .mr = NULL }; - MemoryRegion *root; - AddressSpace *as; - AddrRange range; - FlatView *view; - FlatRange *fr; - - addr += mr->addr; - for (root = mr; root->container; ) { - root = root->container; - addr += root->addr; - } - - as = memory_region_to_address_space(root); - if (!as) { - return ret; - } - range = addrrange_make(int128_make64(addr), int128_make64(size)); - - view = address_space_to_flatview(as); - fr = flatview_lookup(view, range); - if (!fr) { - return ret; - } - - while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) { - --fr; - } - - ret.mr = fr->mr; - ret.fv = view; - range = addrrange_intersection(range, fr->addr); - ret.offset_within_region = fr->offset_in_region; - ret.offset_within_region += int128_get64(int128_sub(range.start, - fr->addr.start)); - ret.size = range.size; - ret.offset_within_address_space = int128_get64(range.start); - ret.readonly = fr->readonly; - ret.nonvolatile = fr->nonvolatile; - return ret; -} - -MemoryRegionSection memory_region_find(MemoryRegion *mr, - hwaddr addr, uint64_t size) -{ - MemoryRegionSection ret; - RCU_READ_LOCK_GUARD(); - ret = memory_region_find_rcu(mr, addr, size); - if (ret.mr) { - memory_region_ref(ret.mr); - } - return ret; -} - -bool memory_region_present(MemoryRegion *container, hwaddr addr) -{ - MemoryRegion *mr; - - RCU_READ_LOCK_GUARD(); - mr = memory_region_find_rcu(container, addr, 1).mr; - return mr && mr != container; -} - -void memory_global_dirty_log_sync(void) -{ - memory_region_sync_dirty_bitmap(NULL); -} - -void memory_global_after_dirty_log_sync(void) -{ - MEMORY_LISTENER_CALL_GLOBAL(log_global_after_sync, Forward); -} - -static VMChangeStateEntry *vmstate_change; - -void memory_global_dirty_log_start(void) -{ - if (vmstate_change) { - qemu_del_vm_change_state_handler(vmstate_change); - vmstate_change = NULL; - } - - global_dirty_log = true; - - MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward); - - /* Refresh DIRTY_MEMORY_MIGRATION bit. */ - memory_region_transaction_begin(); - memory_region_update_pending = true; - memory_region_transaction_commit(); -} - -static void memory_global_dirty_log_do_stop(void) -{ - global_dirty_log = false; - - /* Refresh DIRTY_MEMORY_MIGRATION bit. */ - memory_region_transaction_begin(); - memory_region_update_pending = true; - memory_region_transaction_commit(); - - MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse); -} - -static void memory_vm_change_state_handler(void *opaque, int running, - RunState state) -{ - if (running) { - memory_global_dirty_log_do_stop(); - - if (vmstate_change) { - qemu_del_vm_change_state_handler(vmstate_change); - vmstate_change = NULL; - } - } -} - -void memory_global_dirty_log_stop(void) -{ - if (!runstate_is_running()) { - if (vmstate_change) { - return; - } - vmstate_change = qemu_add_vm_change_state_handler( - memory_vm_change_state_handler, NULL); - return; - } - - memory_global_dirty_log_do_stop(); -} - -static void listener_add_address_space(MemoryListener *listener, - AddressSpace *as) -{ - FlatView *view; - FlatRange *fr; - - if (listener->begin) { - listener->begin(listener); - } - if (global_dirty_log) { - if (listener->log_global_start) { - listener->log_global_start(listener); - } - } - - view = address_space_get_flatview(as); - FOR_EACH_FLAT_RANGE(fr, view) { - MemoryRegionSection section = section_from_flat_range(fr, view); - - if (listener->region_add) { - listener->region_add(listener, §ion); - } - if (fr->dirty_log_mask && listener->log_start) { - listener->log_start(listener, §ion, 0, fr->dirty_log_mask); - } - } - if (listener->commit) { - listener->commit(listener); - } - flatview_unref(view); -} - -static void listener_del_address_space(MemoryListener *listener, - AddressSpace *as) -{ - FlatView *view; - FlatRange *fr; - - if (listener->begin) { - listener->begin(listener); - } - view = address_space_get_flatview(as); - FOR_EACH_FLAT_RANGE(fr, view) { - MemoryRegionSection section = section_from_flat_range(fr, view); - - if (fr->dirty_log_mask && listener->log_stop) { - listener->log_stop(listener, §ion, fr->dirty_log_mask, 0); - } - if (listener->region_del) { - listener->region_del(listener, §ion); - } - } - if (listener->commit) { - listener->commit(listener); - } - flatview_unref(view); -} - -void memory_listener_register(MemoryListener *listener, AddressSpace *as) -{ - MemoryListener *other = NULL; - - listener->address_space = as; - if (QTAILQ_EMPTY(&memory_listeners) - || listener->priority >= QTAILQ_LAST(&memory_listeners)->priority) { - QTAILQ_INSERT_TAIL(&memory_listeners, listener, link); - } else { - QTAILQ_FOREACH(other, &memory_listeners, link) { - if (listener->priority < other->priority) { - break; - } - } - QTAILQ_INSERT_BEFORE(other, listener, link); - } - - if (QTAILQ_EMPTY(&as->listeners) - || listener->priority >= QTAILQ_LAST(&as->listeners)->priority) { - QTAILQ_INSERT_TAIL(&as->listeners, listener, link_as); - } else { - QTAILQ_FOREACH(other, &as->listeners, link_as) { - if (listener->priority < other->priority) { - break; - } - } - QTAILQ_INSERT_BEFORE(other, listener, link_as); - } - - listener_add_address_space(listener, as); -} - -void memory_listener_unregister(MemoryListener *listener) -{ - if (!listener->address_space) { - return; - } - - listener_del_address_space(listener, listener->address_space); - QTAILQ_REMOVE(&memory_listeners, listener, link); - QTAILQ_REMOVE(&listener->address_space->listeners, listener, link_as); - listener->address_space = NULL; -} - -void address_space_remove_listeners(AddressSpace *as) -{ - while (!QTAILQ_EMPTY(&as->listeners)) { - memory_listener_unregister(QTAILQ_FIRST(&as->listeners)); - } -} - -void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name) -{ - memory_region_ref(root); - as->root = root; - as->current_map = NULL; - as->ioeventfd_nb = 0; - as->ioeventfds = NULL; - QTAILQ_INIT(&as->listeners); - QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link); - as->name = g_strdup(name ? name : "anonymous"); - address_space_update_topology(as); - address_space_update_ioeventfds(as); -} - -static void do_address_space_destroy(AddressSpace *as) -{ - assert(QTAILQ_EMPTY(&as->listeners)); - - flatview_unref(as->current_map); - g_free(as->name); - g_free(as->ioeventfds); - memory_region_unref(as->root); -} - -void address_space_destroy(AddressSpace *as) -{ - MemoryRegion *root = as->root; - - /* Flush out anything from MemoryListeners listening in on this */ - memory_region_transaction_begin(); - as->root = NULL; - memory_region_transaction_commit(); - QTAILQ_REMOVE(&address_spaces, as, address_spaces_link); - - /* At this point, as->dispatch and as->current_map are dummy - * entries that the guest should never use. Wait for the old - * values to expire before freeing the data. - */ - as->root = root; - call_rcu(as, do_address_space_destroy, rcu); -} - -static const char *memory_region_type(MemoryRegion *mr) -{ - if (memory_region_is_ram_device(mr)) { - return "ramd"; - } else if (memory_region_is_romd(mr)) { - return "romd"; - } else if (memory_region_is_rom(mr)) { - return "rom"; - } else if (memory_region_is_ram(mr)) { - return "ram"; - } else { - return "i/o"; - } -} - -typedef struct MemoryRegionList MemoryRegionList; - -struct MemoryRegionList { - const MemoryRegion *mr; - QTAILQ_ENTRY(MemoryRegionList) mrqueue; -}; - -typedef QTAILQ_HEAD(, MemoryRegionList) MemoryRegionListHead; - -#define MR_SIZE(size) (int128_nz(size) ? (hwaddr)int128_get64( \ - int128_sub((size), int128_one())) : 0) -#define MTREE_INDENT " " - -static void mtree_expand_owner(const char *label, Object *obj) -{ - DeviceState *dev = (DeviceState *) object_dynamic_cast(obj, TYPE_DEVICE); - - qemu_printf(" %s:{%s", label, dev ? "dev" : "obj"); - if (dev && dev->id) { - qemu_printf(" id=%s", dev->id); - } else { - gchar *canonical_path = object_get_canonical_path(obj); - if (canonical_path) { - qemu_printf(" path=%s", canonical_path); - g_free(canonical_path); - } else { - qemu_printf(" type=%s", object_get_typename(obj)); - } - } - qemu_printf("}"); -} - -static void mtree_print_mr_owner(const MemoryRegion *mr) -{ - Object *owner = mr->owner; - Object *parent = memory_region_owner((MemoryRegion *)mr); - - if (!owner && !parent) { - qemu_printf(" orphan"); - return; - } - if (owner) { - mtree_expand_owner("owner", owner); - } - if (parent && parent != owner) { - mtree_expand_owner("parent", parent); - } -} - -static void mtree_print_mr(const MemoryRegion *mr, unsigned int level, - hwaddr base, - MemoryRegionListHead *alias_print_queue, - bool owner) -{ - MemoryRegionList *new_ml, *ml, *next_ml; - MemoryRegionListHead submr_print_queue; - const MemoryRegion *submr; - unsigned int i; - hwaddr cur_start, cur_end; - - if (!mr) { - return; - } - - for (i = 0; i < level; i++) { - qemu_printf(MTREE_INDENT); - } - - cur_start = base + mr->addr; - cur_end = cur_start + MR_SIZE(mr->size); - - /* - * Try to detect overflow of memory region. This should never - * happen normally. When it happens, we dump something to warn the - * user who is observing this. - */ - if (cur_start < base || cur_end < cur_start) { - qemu_printf("[DETECTED OVERFLOW!] "); - } - - if (mr->alias) { - MemoryRegionList *ml; - bool found = false; - - /* check if the alias is already in the queue */ - QTAILQ_FOREACH(ml, alias_print_queue, mrqueue) { - if (ml->mr == mr->alias) { - found = true; - } - } - - if (!found) { - ml = g_new(MemoryRegionList, 1); - ml->mr = mr->alias; - QTAILQ_INSERT_TAIL(alias_print_queue, ml, mrqueue); - } - qemu_printf(TARGET_FMT_plx "-" TARGET_FMT_plx - " (prio %d, %s%s): alias %s @%s " TARGET_FMT_plx - "-" TARGET_FMT_plx "%s", - cur_start, cur_end, - mr->priority, - mr->nonvolatile ? "nv-" : "", - memory_region_type((MemoryRegion *)mr), - memory_region_name(mr), - memory_region_name(mr->alias), - mr->alias_offset, - mr->alias_offset + MR_SIZE(mr->size), - mr->enabled ? "" : " [disabled]"); - if (owner) { - mtree_print_mr_owner(mr); - } - } else { - qemu_printf(TARGET_FMT_plx "-" TARGET_FMT_plx - " (prio %d, %s%s): %s%s", - cur_start, cur_end, - mr->priority, - mr->nonvolatile ? "nv-" : "", - memory_region_type((MemoryRegion *)mr), - memory_region_name(mr), - mr->enabled ? "" : " [disabled]"); - if (owner) { - mtree_print_mr_owner(mr); - } - } - qemu_printf("\n"); - - QTAILQ_INIT(&submr_print_queue); - - QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) { - new_ml = g_new(MemoryRegionList, 1); - new_ml->mr = submr; - QTAILQ_FOREACH(ml, &submr_print_queue, mrqueue) { - if (new_ml->mr->addr < ml->mr->addr || - (new_ml->mr->addr == ml->mr->addr && - new_ml->mr->priority > ml->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); - } - - 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 TARGET_FMT_plx "-" TARGET_FMT_plx - " (prio %d, %s%s): %s @" TARGET_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 TARGET_FMT_plx "-" TARGET_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; -} - -void mtree_info(bool flatview, bool dispatch_tree, bool owner) -{ - MemoryRegionListHead ml_head; - MemoryRegionList *ml, *ml2; - AddressSpace *as; - - if (flatview) { - FlatView *view; - struct FlatViewInfo fvi = { - .counter = 0, - .dispatch_tree = dispatch_tree, - .owner = owner, - }; - GArray *fv_address_spaces; - GHashTable *views = g_hash_table_new(g_direct_hash, g_direct_equal); - AccelClass *ac = ACCEL_GET_CLASS(current_machine->accelerator); - - 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); - - return; - } - - QTAILQ_INIT(&ml_head); - - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - qemu_printf("address-space: %s\n", as->name); - mtree_print_mr(as->root, 1, 0, &ml_head, owner); - qemu_printf("\n"); - } - - /* 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); - qemu_printf("\n"); - } - - QTAILQ_FOREACH_SAFE(ml, &ml_head, mrqueue, ml2) { - g_free(ml); - } -} - -void memory_region_init_ram(MemoryRegion *mr, - struct 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, - struct 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, - struct 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); -} - -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 void memory_register_types(void) -{ - type_register_static(&memory_region_info); - type_register_static(&iommu_memory_region_info); -} - -type_init(memory_register_types)