diff options
Diffstat (limited to 'qemu/memory.c')
-rw-r--r-- | qemu/memory.c | 2442 |
1 files changed, 0 insertions, 2442 deletions
diff --git a/qemu/memory.c b/qemu/memory.c deleted file mode 100644 index f76f85df9..000000000 --- a/qemu/memory.c +++ /dev/null @@ -1,2442 +0,0 @@ -/* - * Physical memory management - * - * Copyright 2011 Red Hat, Inc. and/or its affiliates - * - * Authors: - * Avi Kivity <avi@redhat.com> - * - * This work is licensed under the terms of the GNU GPL, version 2. See - * the COPYING file in the top-level directory. - * - * Contributions after 2012-01-13 are licensed under the terms of the - * GNU GPL, version 2 or (at your option) any later version. - */ - -#include "qemu/osdep.h" -#include "qapi/error.h" -#include "exec/memory.h" -#include "exec/address-spaces.h" -#include "exec/ioport.h" -#include "qapi/visitor.h" -#include "qemu/bitops.h" -#include "qemu/error-report.h" -#include "qom/object.h" -#include "trace.h" - -#include "exec/memory-internal.h" -#include "exec/ram_addr.h" -#include "sysemu/kvm.h" -#include "sysemu/sysemu.h" - -//#define DEBUG_UNASSIGNED - -#define RAM_ADDR_INVALID (~(ram_addr_t)0) - -static unsigned memory_region_transaction_depth; -static bool memory_region_update_pending; -static bool ioeventfd_update_pending; -static bool global_dirty_log = false; - -static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners - = QTAILQ_HEAD_INITIALIZER(memory_listeners); - -static QTAILQ_HEAD(, AddressSpace) address_spaces - = QTAILQ_HEAD_INITIALIZER(address_spaces); - -typedef struct AddrRange AddrRange; - -/* - * Note that signed integers are needed for negative offsetting in aliases - * (large MemoryRegion::alias_offset). - */ -struct AddrRange { - Int128 start; - Int128 size; -}; - -static AddrRange addrrange_make(Int128 start, Int128 size) -{ - return (AddrRange) { start, size }; -} - -static bool addrrange_equal(AddrRange r1, AddrRange r2) -{ - return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size); -} - -static Int128 addrrange_end(AddrRange r) -{ - return int128_add(r.start, r.size); -} - -static AddrRange addrrange_shift(AddrRange range, Int128 delta) -{ - int128_addto(&range.start, delta); - return range; -} - -static bool addrrange_contains(AddrRange range, Int128 addr) -{ - return int128_ge(addr, range.start) - && int128_lt(addr, addrrange_end(range)); -} - -static bool addrrange_intersects(AddrRange r1, AddrRange r2) -{ - return addrrange_contains(r1, r2.start) - || addrrange_contains(r2, r1.start); -} - -static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2) -{ - Int128 start = int128_max(r1.start, r2.start); - Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2)); - return addrrange_make(start, int128_sub(end, start)); -} - -enum ListenerDirection { Forward, Reverse }; - -static bool memory_listener_match(MemoryListener *listener, - MemoryRegionSection *section) -{ - return !listener->address_space_filter - || listener->address_space_filter == section->address_space; -} - -#define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \ - do { \ - MemoryListener *_listener; \ - \ - switch (_direction) { \ - case Forward: \ - QTAILQ_FOREACH(_listener, &memory_listeners, link) { \ - if (_listener->_callback) { \ - _listener->_callback(_listener, ##_args); \ - } \ - } \ - break; \ - case Reverse: \ - QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \ - memory_listeners, link) { \ - if (_listener->_callback) { \ - _listener->_callback(_listener, ##_args); \ - } \ - } \ - break; \ - default: \ - abort(); \ - } \ - } while (0) - -#define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \ - do { \ - MemoryListener *_listener; \ - \ - switch (_direction) { \ - case Forward: \ - QTAILQ_FOREACH(_listener, &memory_listeners, link) { \ - if (_listener->_callback \ - && memory_listener_match(_listener, _section)) { \ - _listener->_callback(_listener, _section, ##_args); \ - } \ - } \ - break; \ - case Reverse: \ - QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \ - memory_listeners, link) { \ - if (_listener->_callback \ - && memory_listener_match(_listener, _section)) { \ - _listener->_callback(_listener, _section, ##_args); \ - } \ - } \ - break; \ - default: \ - abort(); \ - } \ - } while (0) - -/* No need to ref/unref .mr, the FlatRange keeps it alive. */ -#define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback, _args...) \ - MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \ - .mr = (fr)->mr, \ - .address_space = (as), \ - .offset_within_region = (fr)->offset_in_region, \ - .size = (fr)->addr.size, \ - .offset_within_address_space = int128_get64((fr)->addr.start), \ - .readonly = (fr)->readonly, \ - }), ##_args) - -struct CoalescedMemoryRange { - AddrRange addr; - QTAILQ_ENTRY(CoalescedMemoryRange) link; -}; - -struct MemoryRegionIoeventfd { - AddrRange addr; - bool match_data; - uint64_t data; - EventNotifier *e; -}; - -static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a, - MemoryRegionIoeventfd b) -{ - if (int128_lt(a.addr.start, b.addr.start)) { - return true; - } else if (int128_gt(a.addr.start, b.addr.start)) { - return false; - } else if (int128_lt(a.addr.size, b.addr.size)) { - return true; - } else if (int128_gt(a.addr.size, b.addr.size)) { - return false; - } else if (a.match_data < b.match_data) { - return true; - } else if (a.match_data > b.match_data) { - return false; - } else if (a.match_data) { - if (a.data < b.data) { - return true; - } else if (a.data > b.data) { - return false; - } - } - if (a.e < b.e) { - return true; - } else if (a.e > b.e) { - return false; - } - return false; -} - -static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a, - MemoryRegionIoeventfd b) -{ - return !memory_region_ioeventfd_before(a, b) - && !memory_region_ioeventfd_before(b, a); -} - -typedef struct FlatRange FlatRange; -typedef struct FlatView FlatView; - -/* Range of memory in the global map. Addresses are absolute. */ -struct FlatRange { - MemoryRegion *mr; - hwaddr offset_in_region; - AddrRange addr; - uint8_t dirty_log_mask; - bool romd_mode; - bool readonly; -}; - -/* Flattened global view of current active memory hierarchy. Kept in sorted - * order. - */ -struct FlatView { - struct rcu_head rcu; - unsigned ref; - FlatRange *ranges; - unsigned nr; - unsigned nr_allocated; -}; - -typedef struct AddressSpaceOps AddressSpaceOps; - -#define FOR_EACH_FLAT_RANGE(var, view) \ - for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var) - -static bool flatrange_equal(FlatRange *a, FlatRange *b) -{ - return a->mr == b->mr - && addrrange_equal(a->addr, b->addr) - && a->offset_in_region == b->offset_in_region - && a->romd_mode == b->romd_mode - && a->readonly == b->readonly; -} - -static void flatview_init(FlatView *view) -{ - view->ref = 1; - view->ranges = NULL; - view->nr = 0; - view->nr_allocated = 0; -} - -/* Insert a range into a given position. Caller is responsible for maintaining - * sorting order. - */ -static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range) -{ - if (view->nr == view->nr_allocated) { - view->nr_allocated = MAX(2 * view->nr, 10); - view->ranges = g_realloc(view->ranges, - view->nr_allocated * sizeof(*view->ranges)); - } - memmove(view->ranges + pos + 1, view->ranges + pos, - (view->nr - pos) * sizeof(FlatRange)); - view->ranges[pos] = *range; - memory_region_ref(range->mr); - ++view->nr; -} - -static void flatview_destroy(FlatView *view) -{ - int i; - - for (i = 0; i < view->nr; i++) { - memory_region_unref(view->ranges[i].mr); - } - g_free(view->ranges); - g_free(view); -} - -static void flatview_ref(FlatView *view) -{ - atomic_inc(&view->ref); -} - -static void flatview_unref(FlatView *view) -{ - if (atomic_fetch_dec(&view->ref) == 1) { - flatview_destroy(view); - } -} - -static bool can_merge(FlatRange *r1, FlatRange *r2) -{ - return int128_eq(addrrange_end(r1->addr), r2->addr.start) - && r1->mr == r2->mr - && int128_eq(int128_add(int128_make64(r1->offset_in_region), - r1->addr.size), - int128_make64(r2->offset_in_region)) - && r1->dirty_log_mask == r2->dirty_log_mask - && r1->romd_mode == r2->romd_mode - && r1->readonly == r2->readonly; -} - -/* Attempt to simplify a view by merging adjacent ranges */ -static void flatview_simplify(FlatView *view) -{ - unsigned i, j; - - i = 0; - while (i < view->nr) { - j = i + 1; - while (j < view->nr - && can_merge(&view->ranges[j-1], &view->ranges[j])) { - int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size); - ++j; - } - ++i; - memmove(&view->ranges[i], &view->ranges[j], - (view->nr - j) * sizeof(view->ranges[j])); - view->nr -= j - i; - } -} - -static bool memory_region_big_endian(MemoryRegion *mr) -{ -#ifdef TARGET_WORDS_BIGENDIAN - return mr->ops->endianness != DEVICE_LITTLE_ENDIAN; -#else - return mr->ops->endianness == DEVICE_BIG_ENDIAN; -#endif -} - -static bool memory_region_wrong_endianness(MemoryRegion *mr) -{ -#ifdef TARGET_WORDS_BIGENDIAN - return mr->ops->endianness == DEVICE_LITTLE_ENDIAN; -#else - return mr->ops->endianness == DEVICE_BIG_ENDIAN; -#endif -} - -static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size) -{ - if (memory_region_wrong_endianness(mr)) { - switch (size) { - case 1: - break; - case 2: - *data = bswap16(*data); - break; - case 4: - *data = bswap32(*data); - break; - case 8: - *data = bswap64(*data); - break; - default: - abort(); - } - } -} - -static 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_oldmmio_read_accessor(MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - unsigned shift, - uint64_t mask, - MemTxAttrs attrs) -{ - uint64_t tmp; - - tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr); - if (mr->subpage) { - trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size); - } else if (mr == &io_mem_notdirty) { - /* Accesses to code which has previously been translated into a TB show - * up in the MMIO path, as accesses to the io_mem_notdirty - * MemoryRegion. */ - trace_memory_region_tb_read(get_cpu_index(), 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); - } - *value |= (tmp & mask) << shift; - return MEMTX_OK; -} - -static MemTxResult memory_region_read_accessor(MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - unsigned 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 (mr == &io_mem_notdirty) { - /* Accesses to code which has previously been translated into a TB show - * up in the MMIO path, as accesses to the io_mem_notdirty - * MemoryRegion. */ - trace_memory_region_tb_read(get_cpu_index(), 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); - } - *value |= (tmp & mask) << shift; - return MEMTX_OK; -} - -static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - unsigned 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 (mr == &io_mem_notdirty) { - /* Accesses to code which has previously been translated into a TB show - * up in the MMIO path, as accesses to the io_mem_notdirty - * MemoryRegion. */ - trace_memory_region_tb_read(get_cpu_index(), 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); - } - *value |= (tmp & mask) << shift; - return r; -} - -static MemTxResult memory_region_oldmmio_write_accessor(MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - unsigned shift, - uint64_t mask, - MemTxAttrs attrs) -{ - uint64_t tmp; - - tmp = (*value >> shift) & mask; - if (mr->subpage) { - trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size); - } else if (mr == &io_mem_notdirty) { - /* Accesses to code which has previously been translated into a TB show - * up in the MMIO path, as accesses to the io_mem_notdirty - * MemoryRegion. */ - trace_memory_region_tb_write(get_cpu_index(), 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->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp); - return MEMTX_OK; -} - -static MemTxResult memory_region_write_accessor(MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - unsigned shift, - uint64_t mask, - MemTxAttrs attrs) -{ - uint64_t tmp; - - tmp = (*value >> shift) & mask; - if (mr->subpage) { - trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size); - } else if (mr == &io_mem_notdirty) { - /* Accesses to code which has previously been translated into a TB show - * up in the MMIO path, as accesses to the io_mem_notdirty - * MemoryRegion. */ - trace_memory_region_tb_write(get_cpu_index(), 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, - unsigned shift, - uint64_t mask, - MemTxAttrs attrs) -{ - uint64_t tmp; - - tmp = (*value >> shift) & mask; - if (mr->subpage) { - trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size); - } else if (mr == &io_mem_notdirty) { - /* Accesses to code which has previously been translated into a TB show - * up in the MMIO path, as accesses to the io_mem_notdirty - * MemoryRegion. */ - trace_memory_region_tb_write(get_cpu_index(), 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)(MemoryRegion *mr, - hwaddr addr, - uint64_t *value, - unsigned size, - unsigned 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 = -1ULL >> (64 - access_size * 8); - if (memory_region_big_endian(mr)) { - for (i = 0; i < size; i += access_size) { - r |= access(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(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) -{ - MemoryRegion *subregion; - unsigned i; - hwaddr offset_in_region; - Int128 remain; - Int128 now; - FlatRange fr; - AddrRange tmp; - - if (!mr->enabled) { - return; - } - - int128_addto(&base, int128_make64(mr->addr)); - readonly |= mr->readonly; - - tmp = addrrange_make(base, mr->size); - - if (!addrrange_intersects(tmp, clip)) { - return; - } - - clip = addrrange_intersection(tmp, clip); - - if (mr->alias) { - int128_subfrom(&base, int128_make64(mr->alias->addr)); - int128_subfrom(&base, int128_make64(mr->alias_offset)); - render_memory_region(view, mr->alias, base, clip, readonly); - return; - } - - /* Render subregions in priority order. */ - QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) { - render_memory_region(view, subregion, base, clip, readonly); - } - - if (!mr->terminates) { - return; - } - - offset_in_region = int128_get64(int128_sub(clip.start, base)); - base = clip.start; - remain = clip.size; - - fr.mr = mr; - fr.dirty_log_mask = memory_region_get_dirty_log_mask(mr); - fr.romd_mode = mr->romd_mode; - fr.readonly = readonly; - - /* Render the region itself into any gaps left by the current view. */ - for (i = 0; i < view->nr && int128_nz(remain); ++i) { - if (int128_ge(base, addrrange_end(view->ranges[i].addr))) { - continue; - } - if (int128_lt(base, view->ranges[i].addr.start)) { - now = int128_min(remain, - int128_sub(view->ranges[i].addr.start, base)); - fr.offset_in_region = offset_in_region; - fr.addr = addrrange_make(base, now); - flatview_insert(view, i, &fr); - ++i; - int128_addto(&base, now); - offset_in_region += int128_get64(now); - int128_subfrom(&remain, now); - } - now = int128_sub(int128_min(int128_add(base, remain), - addrrange_end(view->ranges[i].addr)), - base); - int128_addto(&base, now); - offset_in_region += int128_get64(now); - int128_subfrom(&remain, now); - } - if (int128_nz(remain)) { - fr.offset_in_region = offset_in_region; - fr.addr = addrrange_make(base, remain); - flatview_insert(view, i, &fr); - } -} - -/* Render a memory topology into a list of disjoint absolute ranges. */ -static FlatView *generate_memory_topology(MemoryRegion *mr) -{ - FlatView *view; - - view = g_new(FlatView, 1); - flatview_init(view); - - if (mr) { - render_memory_region(view, mr, int128_zero(), - addrrange_make(int128_zero(), int128_2_64()), false); - } - flatview_simplify(view); - - return view; -} - -static void address_space_add_del_ioeventfds(AddressSpace *as, - MemoryRegionIoeventfd *fds_new, - unsigned fds_new_nb, - MemoryRegionIoeventfd *fds_old, - unsigned fds_old_nb) -{ - unsigned iold, inew; - MemoryRegionIoeventfd *fd; - MemoryRegionSection section; - - /* Generate a symmetric difference of the old and new fd sets, adding - * and deleting as necessary. - */ - - iold = inew = 0; - while (iold < fds_old_nb || inew < fds_new_nb) { - if (iold < fds_old_nb - && (inew == fds_new_nb - || memory_region_ioeventfd_before(fds_old[iold], - fds_new[inew]))) { - fd = &fds_old[iold]; - section = (MemoryRegionSection) { - .address_space = as, - .offset_within_address_space = int128_get64(fd->addr.start), - .size = fd->addr.size, - }; - MEMORY_LISTENER_CALL(eventfd_del, Forward, §ion, - fd->match_data, fd->data, fd->e); - ++iold; - } else if (inew < fds_new_nb - && (iold == fds_old_nb - || memory_region_ioeventfd_before(fds_new[inew], - fds_old[iold]))) { - fd = &fds_new[inew]; - section = (MemoryRegionSection) { - .address_space = as, - .offset_within_address_space = int128_get64(fd->addr.start), - .size = fd->addr.size, - }; - MEMORY_LISTENER_CALL(eventfd_add, Reverse, §ion, - fd->match_data, fd->data, fd->e); - ++inew; - } else { - ++iold; - ++inew; - } - } -} - -static FlatView *address_space_get_flatview(AddressSpace *as) -{ - FlatView *view; - - rcu_read_lock(); - view = atomic_rcu_read(&as->current_map); - flatview_ref(view); - rcu_read_unlock(); - return view; -} - -static void address_space_update_ioeventfds(AddressSpace *as) -{ - FlatView *view; - FlatRange *fr; - unsigned ioeventfd_nb = 0; - MemoryRegionIoeventfd *ioeventfds = NULL; - AddrRange tmp; - unsigned i; - - view = address_space_get_flatview(as); - FOR_EACH_FLAT_RANGE(fr, view) { - for (i = 0; i < fr->mr->ioeventfd_nb; ++i) { - tmp = addrrange_shift(fr->mr->ioeventfds[i].addr, - int128_sub(fr->addr.start, - int128_make64(fr->offset_in_region))); - if (addrrange_intersects(fr->addr, tmp)) { - ++ioeventfd_nb; - ioeventfds = g_realloc(ioeventfds, - ioeventfd_nb * sizeof(*ioeventfds)); - ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i]; - ioeventfds[ioeventfd_nb-1].addr = tmp; - } - } - } - - address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb, - as->ioeventfds, as->ioeventfd_nb); - - g_free(as->ioeventfds); - as->ioeventfds = ioeventfds; - as->ioeventfd_nb = ioeventfd_nb; - flatview_unref(view); -} - -static void address_space_update_topology_pass(AddressSpace *as, - const FlatView *old_view, - const FlatView *new_view, - bool adding) -{ - unsigned iold, inew; - FlatRange *frold, *frnew; - - /* Generate a symmetric difference of the old and new memory maps. - * Kill ranges in the old map, and instantiate ranges in the new map. - */ - iold = inew = 0; - while (iold < old_view->nr || inew < new_view->nr) { - if (iold < old_view->nr) { - frold = &old_view->ranges[iold]; - } else { - frold = NULL; - } - if (inew < new_view->nr) { - frnew = &new_view->ranges[inew]; - } else { - frnew = NULL; - } - - if (frold - && (!frnew - || int128_lt(frold->addr.start, frnew->addr.start) - || (int128_eq(frold->addr.start, frnew->addr.start) - && !flatrange_equal(frold, frnew)))) { - /* In old but not in new, or in both but attributes changed. */ - - if (!adding) { - MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del); - } - - ++iold; - } else if (frold && frnew && flatrange_equal(frold, frnew)) { - /* In both and unchanged (except logging may have changed) */ - - if (adding) { - MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop); - if (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); - } - - ++inew; - } - } -} - - -static void address_space_update_topology(AddressSpace *as) -{ - FlatView *old_view = address_space_get_flatview(as); - FlatView *new_view = generate_memory_topology(as->root); - - address_space_update_topology_pass(as, old_view, new_view, false); - address_space_update_topology_pass(as, old_view, new_view, true); - - /* Writes are protected by the BQL. */ - atomic_rcu_set(&as->current_map, new_view); - call_rcu(old_view, flatview_unref, rcu); - - /* Note that all the old MemoryRegions are still alive up to this - * point. This relieves most MemoryListeners from the need to - * ref/unref the MemoryRegions they get---unless they use them - * outside the iothread mutex, in which case precise reference - * counting is necessary. - */ - flatview_unref(old_view); - - address_space_update_ioeventfds(as); -} - -void memory_region_transaction_begin(void) -{ - qemu_flush_coalesced_mmio_buffer(); - ++memory_region_transaction_depth; -} - -static void memory_region_clear_pending(void) -{ - memory_region_update_pending = false; - ioeventfd_update_pending = false; -} - -void memory_region_transaction_commit(void) -{ - AddressSpace *as; - - assert(memory_region_transaction_depth); - --memory_region_transaction_depth; - if (!memory_region_transaction_depth) { - if (memory_region_update_pending) { - MEMORY_LISTENER_CALL_GLOBAL(begin, Forward); - - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - address_space_update_topology(as); - } - - MEMORY_LISTENER_CALL_GLOBAL(commit, Forward); - } else if (ioeventfd_update_pending) { - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - address_space_update_ioeventfds(as); - } - } - memory_region_clear_pending(); - } -} - -static void memory_region_destructor_none(MemoryRegion *mr) -{ -} - -static void memory_region_destructor_ram(MemoryRegion *mr) -{ - qemu_ram_free(mr->ram_block); -} - -static void memory_region_destructor_rom_device(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; -} - -void memory_region_init(MemoryRegion *mr, - Object *owner, - const char *name, - uint64_t size) -{ - object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION); - mr->size = int128_make64(size); - if (size == UINT64_MAX) { - mr->size = int128_2_64(); - } - mr->name = g_strdup(name); - 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); - } -} - -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 bool memory_region_get_may_overlap(Object *obj, Error **errp) -{ - MemoryRegion *mr = MEMORY_REGION(obj); - - return mr->may_overlap; -} - -static void memory_region_get_size(Object *obj, Visitor *v, 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_bool(OBJECT(mr), "may-overlap", - memory_region_get_may_overlap, - NULL, /* memory_region_set_may_overlap */ - &error_abort); - object_property_add(OBJECT(mr), "size", "uint64", - memory_region_get_size, - NULL, /* memory_region_set_size, */ - NULL, NULL, &error_abort); -} - -static uint64_t unassigned_mem_read(void *opaque, hwaddr addr, - unsigned size) -{ -#ifdef DEBUG_UNASSIGNED - printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); -#endif - if (current_cpu != NULL) { - cpu_unassigned_access(current_cpu, addr, false, false, 0, size); - } - return 0; -} - -static void unassigned_mem_write(void *opaque, hwaddr addr, - uint64_t val, unsigned size) -{ -#ifdef DEBUG_UNASSIGNED - printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val); -#endif - if (current_cpu != NULL) { - cpu_unassigned_access(current_cpu, addr, true, false, 0, size); - } -} - -static bool unassigned_mem_accepts(void *opaque, hwaddr addr, - unsigned size, bool is_write) -{ - return false; -} - -const MemoryRegionOps unassigned_mem_ops = { - .valid.accepts = unassigned_mem_accepts, - .endianness = DEVICE_NATIVE_ENDIAN, -}; - -bool memory_region_access_valid(MemoryRegion *mr, - hwaddr addr, - unsigned size, - bool is_write) -{ - int access_size_min, access_size_max; - int access_size, i; - - if (!mr->ops->valid.unaligned && (addr & (size - 1))) { - return false; - } - - if (!mr->ops->valid.accepts) { - return true; - } - - access_size_min = mr->ops->valid.min_access_size; - if (!mr->ops->valid.min_access_size) { - access_size_min = 1; - } - - access_size_max = mr->ops->valid.max_access_size; - if (!mr->ops->valid.max_access_size) { - access_size_max = 4; - } - - access_size = MAX(MIN(size, access_size_max), access_size_min); - for (i = 0; i < size; i += access_size) { - if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size, - is_write)) { - return false; - } - } - - return true; -} - -static 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 if (mr->ops->read_with_attrs) { - 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); - } else { - return access_with_adjusted_size(addr, pval, size, 1, 4, - memory_region_oldmmio_read_accessor, - mr, attrs); - } -} - -MemTxResult memory_region_dispatch_read(MemoryRegion *mr, - hwaddr addr, - uint64_t *pval, - unsigned size, - MemTxAttrs attrs) -{ - MemTxResult r; - - if (!memory_region_access_valid(mr, addr, size, false)) { - *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, size); - 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, - unsigned size, - MemTxAttrs attrs) -{ - if (!memory_region_access_valid(mr, addr, size, true)) { - unassigned_mem_write(mr, addr, data, size); - return MEMTX_DECODE_ERROR; - } - - adjust_endianness(mr, &data, size); - - 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 if (mr->ops->write_with_attrs) { - 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); - } else { - return access_with_adjusted_size(addr, &data, size, 1, 4, - memory_region_oldmmio_write_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(MemoryRegion *mr, - Object *owner, - const char *name, - uint64_t size, - Error **errp) -{ - 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, mr, errp); - mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; -} - -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) -{ - 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, errp); - mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; -} - -#ifdef __linux__ -void memory_region_init_ram_from_file(MemoryRegion *mr, - struct Object *owner, - const char *name, - uint64_t size, - bool share, - const char *path, - Error **errp) -{ - memory_region_init(mr, owner, name, size); - mr->ram = true; - mr->terminates = true; - mr->destructor = memory_region_destructor_ram; - mr->ram_block = qemu_ram_alloc_from_file(size, mr, share, path, errp); - mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0; -} -#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_set_skip_dump(MemoryRegion *mr) -{ - mr->skip_dump = true; -} - -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_device(MemoryRegion *mr, - Object *owner, - const MemoryRegionOps *ops, - void *opaque, - const char *name, - uint64_t size, - Error **errp) -{ - memory_region_init(mr, owner, name, size); - mr->ops = ops; - mr->opaque = opaque; - mr->terminates = true; - mr->rom_device = true; - mr->destructor = memory_region_destructor_rom_device; - mr->ram_block = qemu_ram_alloc(size, mr, errp); -} - -void memory_region_init_iommu(MemoryRegion *mr, - Object *owner, - const MemoryRegionIOMMUOps *ops, - const char *name, - uint64_t size) -{ - memory_region_init(mr, owner, name, size); - mr->iommu_ops = ops, - mr->terminates = true; /* then re-forwards */ - notifier_list_init(&mr->iommu_notify); -} - -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_skip_dump(MemoryRegion *mr) -{ - return mr->skip_dump; -} - -uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr) -{ - uint8_t mask = mr->dirty_log_mask; - if (global_dirty_log) { - 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); -} - -void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n) -{ - notifier_list_add(&mr->iommu_notify, n); -} - -void memory_region_iommu_replay(MemoryRegion *mr, Notifier *n, - hwaddr granularity, bool is_write) -{ - hwaddr addr; - IOMMUTLBEntry iotlb; - - for (addr = 0; addr < memory_region_size(mr); addr += granularity) { - iotlb = mr->iommu_ops->translate(mr, addr, is_write); - 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(Notifier *n) -{ - notifier_remove(n); -} - -void memory_region_notify_iommu(MemoryRegion *mr, - IOMMUTLBEntry entry) -{ - assert(memory_region_is_iommu(mr)); - notifier_list_notify(&mr->iommu_notify, &entry); -} - -void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client) -{ - uint8_t mask = 1 << client; - 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(); -} - -bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr, - hwaddr size, unsigned client) -{ - assert(mr->ram_block); - return cpu_physical_memory_get_dirty(memory_region_get_ram_addr(mr) + addr, - size, client); -} - -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)); -} - -bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr, - hwaddr size, unsigned client) -{ - assert(mr->ram_block); - return cpu_physical_memory_test_and_clear_dirty( - memory_region_get_ram_addr(mr) + addr, size, client); -} - - -void memory_region_sync_dirty_bitmap(MemoryRegion *mr) -{ - AddressSpace *as; - FlatRange *fr; - - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - FlatView *view = address_space_get_flatview(as); - FOR_EACH_FLAT_RANGE(fr, view) { - if (fr->mr == mr) { - MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync); - } - } - flatview_unref(view); - } -} - -void memory_region_set_readonly(MemoryRegion *mr, bool readonly) -{ - if (mr->readonly != readonly) { - memory_region_transaction_begin(); - mr->readonly = readonly; - memory_region_update_pending |= mr->enabled; - memory_region_transaction_commit(); - } -} - -void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode) -{ - if (mr->romd_mode != romd_mode) { - memory_region_transaction_begin(); - mr->romd_mode = romd_mode; - memory_region_update_pending |= mr->enabled; - memory_region_transaction_commit(); - } -} - -void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr, - hwaddr size, unsigned client) -{ - assert(mr->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) -{ - if (mr->alias) { - return memory_region_get_fd(mr->alias); - } - - assert(mr->ram_block); - - return qemu_get_ram_fd(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK); -} - -void *memory_region_get_ram_ptr(MemoryRegion *mr) -{ - void *ptr; - uint64_t offset = 0; - - rcu_read_lock(); - while (mr->alias) { - offset += mr->alias_offset; - mr = mr->alias; - } - assert(mr->ram_block); - ptr = qemu_get_ram_ptr(mr->ram_block, - memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK); - rcu_read_unlock(); - - return ptr + offset; -} - -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(memory_region_get_ram_addr(mr), newsize, errp); -} - -static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as) -{ - FlatView *view; - FlatRange *fr; - CoalescedMemoryRange *cmr; - AddrRange tmp; - MemoryRegionSection section; - - view = address_space_get_flatview(as); - FOR_EACH_FLAT_RANGE(fr, view) { - if (fr->mr == mr) { - section = (MemoryRegionSection) { - .address_space = as, - .offset_within_address_space = int128_get64(fr->addr.start), - .size = fr->addr.size, - }; - - MEMORY_LISTENER_CALL(coalesced_mmio_del, Reverse, §ion, - int128_get64(fr->addr.start), - int128_get64(fr->addr.size)); - QTAILQ_FOREACH(cmr, &mr->coalesced, link) { - tmp = addrrange_shift(cmr->addr, - int128_sub(fr->addr.start, - int128_make64(fr->offset_in_region))); - if (!addrrange_intersects(tmp, fr->addr)) { - continue; - } - tmp = addrrange_intersection(tmp, fr->addr); - MEMORY_LISTENER_CALL(coalesced_mmio_add, Forward, §ion, - int128_get64(tmp.start), - int128_get64(tmp.size)); - } - } - } - flatview_unref(view); -} - -static void memory_region_update_coalesced_range(MemoryRegion *mr) -{ - AddressSpace *as; - - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - memory_region_update_coalesced_range_as(mr, as); - } -} - -void memory_region_set_coalescing(MemoryRegion *mr) -{ - memory_region_clear_coalescing(mr); - memory_region_add_coalescing(mr, 0, int128_get64(mr->size)); -} - -void memory_region_add_coalescing(MemoryRegion *mr, - hwaddr offset, - uint64_t size) -{ - CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr)); - - cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size)); - QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link); - memory_region_update_coalesced_range(mr); - memory_region_set_flush_coalesced(mr); -} - -void memory_region_clear_coalescing(MemoryRegion *mr) -{ - CoalescedMemoryRange *cmr; - bool updated = false; - - qemu_flush_coalesced_mmio_buffer(); - mr->flush_coalesced_mmio = false; - - while (!QTAILQ_EMPTY(&mr->coalesced)) { - cmr = QTAILQ_FIRST(&mr->coalesced); - QTAILQ_REMOVE(&mr->coalesced, cmr, link); - g_free(cmr); - updated = true; - } - - if (updated) { - memory_region_update_coalesced_range(mr); - } -} - -void memory_region_set_flush_coalesced(MemoryRegion *mr) -{ - mr->flush_coalesced_mmio = true; -} - -void memory_region_clear_flush_coalesced(MemoryRegion *mr) -{ - qemu_flush_coalesced_mmio_buffer(); - if (QTAILQ_EMPTY(&mr->coalesced)) { - mr->flush_coalesced_mmio = false; - } -} - -void memory_region_set_global_locking(MemoryRegion *mr) -{ - mr->global_locking = true; -} - -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); - } - 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); - } - memory_region_transaction_begin(); - for (i = 0; i < mr->ioeventfd_nb; ++i) { - if (memory_region_ioeventfd_equal(mrfd, mr->ioeventfds[i])) { - break; - } - } - assert(i != mr->ioeventfd_nb); - memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1], - sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1))); - --mr->ioeventfd_nb; - mr->ioeventfds = g_realloc(mr->ioeventfds, - sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1); - ioeventfd_update_pending |= mr->enabled; - memory_region_transaction_commit(); -} - -static void memory_region_update_container_subregions(MemoryRegion *subregion) -{ - hwaddr offset = subregion->addr; - MemoryRegion *mr = subregion->container; - MemoryRegion *other; - - memory_region_transaction_begin(); - - memory_region_ref(subregion); - QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { - if (subregion->may_overlap || other->may_overlap) { - continue; - } - if (int128_ge(int128_make64(offset), - int128_add(int128_make64(other->addr), other->size)) - || int128_le(int128_add(int128_make64(offset), subregion->size), - int128_make64(other->addr))) { - continue; - } -#if 0 - printf("warning: subregion collision %llx/%llx (%s) " - "vs %llx/%llx (%s)\n", - (unsigned long long)offset, - (unsigned long long)int128_get64(subregion->size), - subregion->name, - (unsigned long long)other->addr, - (unsigned long long)int128_get64(other->size), - other->name); -#endif - } - QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { - if (subregion->priority >= other->priority) { - QTAILQ_INSERT_BEFORE(other, subregion, subregions_link); - goto done; - } - } - QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link); -done: - memory_region_update_pending |= mr->enabled && subregion->enabled; - memory_region_transaction_commit(); -} - -static void memory_region_add_subregion_common(MemoryRegion *mr, - hwaddr offset, - MemoryRegion *subregion) -{ - assert(!subregion->container); - subregion->container = mr; - subregion->addr = offset; - memory_region_update_container_subregions(subregion); -} - -void memory_region_add_subregion(MemoryRegion *mr, - hwaddr offset, - MemoryRegion *subregion) -{ - subregion->may_overlap = false; - subregion->priority = 0; - memory_region_add_subregion_common(mr, offset, subregion); -} - -void memory_region_add_subregion_overlap(MemoryRegion *mr, - hwaddr offset, - MemoryRegion *subregion, - int priority) -{ - subregion->may_overlap = true; - subregion->priority = priority; - memory_region_add_subregion_common(mr, offset, subregion); -} - -void memory_region_del_subregion(MemoryRegion *mr, - MemoryRegion *subregion) -{ - memory_region_transaction_begin(); - assert(subregion->container == mr); - subregion->container = NULL; - QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link); - memory_region_unref(subregion); - memory_region_update_pending |= mr->enabled && subregion->enabled; - memory_region_transaction_commit(); -} - -void memory_region_set_enabled(MemoryRegion *mr, bool enabled) -{ - if (enabled == mr->enabled) { - return; - } - memory_region_transaction_begin(); - mr->enabled = enabled; - memory_region_update_pending = true; - memory_region_transaction_commit(); -} - -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 = atomic_rcu_read(&as->current_map); - 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.address_space = as; - range = addrrange_intersection(range, fr->addr); - ret.offset_within_region = fr->offset_in_region; - ret.offset_within_region += int128_get64(int128_sub(range.start, - fr->addr.start)); - ret.size = range.size; - ret.offset_within_address_space = int128_get64(range.start); - ret.readonly = fr->readonly; - return ret; -} - -MemoryRegionSection memory_region_find(MemoryRegion *mr, - hwaddr addr, uint64_t size) -{ - MemoryRegionSection ret; - rcu_read_lock(); - ret = memory_region_find_rcu(mr, addr, size); - if (ret.mr) { - memory_region_ref(ret.mr); - } - rcu_read_unlock(); - return ret; -} - -bool memory_region_present(MemoryRegion *container, hwaddr addr) -{ - MemoryRegion *mr; - - rcu_read_lock(); - mr = memory_region_find_rcu(container, addr, 1).mr; - rcu_read_unlock(); - return mr && mr != container; -} - -void address_space_sync_dirty_bitmap(AddressSpace *as) -{ - FlatView *view; - FlatRange *fr; - - view = address_space_get_flatview(as); - FOR_EACH_FLAT_RANGE(fr, view) { - MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync); - } - flatview_unref(view); -} - -void memory_global_dirty_log_start(void) -{ - global_dirty_log = true; - - MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward); - - /* Refresh DIRTY_LOG_MIGRATION bit. */ - memory_region_transaction_begin(); - memory_region_update_pending = true; - memory_region_transaction_commit(); -} - -void memory_global_dirty_log_stop(void) -{ - global_dirty_log = false; - - /* Refresh DIRTY_LOG_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 listener_add_address_space(MemoryListener *listener, - AddressSpace *as) -{ - FlatView *view; - FlatRange *fr; - - if (listener->address_space_filter - && listener->address_space_filter != as) { - return; - } - - 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 = { - .mr = fr->mr, - .address_space = as, - .offset_within_region = fr->offset_in_region, - .size = fr->addr.size, - .offset_within_address_space = int128_get64(fr->addr.start), - .readonly = fr->readonly, - }; - if (fr->dirty_log_mask && listener->log_start) { - listener->log_start(listener, §ion, 0, fr->dirty_log_mask); - } - if (listener->region_add) { - listener->region_add(listener, §ion); - } - } - if (listener->commit) { - listener->commit(listener); - } - flatview_unref(view); -} - -void memory_listener_register(MemoryListener *listener, AddressSpace *filter) -{ - MemoryListener *other = NULL; - AddressSpace *as; - - listener->address_space_filter = filter; - if (QTAILQ_EMPTY(&memory_listeners) - || listener->priority >= QTAILQ_LAST(&memory_listeners, - memory_listeners)->priority) { - QTAILQ_INSERT_TAIL(&memory_listeners, listener, link); - } else { - QTAILQ_FOREACH(other, &memory_listeners, link) { - if (listener->priority < other->priority) { - break; - } - } - QTAILQ_INSERT_BEFORE(other, listener, link); - } - - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - listener_add_address_space(listener, as); - } -} - -void memory_listener_unregister(MemoryListener *listener) -{ - QTAILQ_REMOVE(&memory_listeners, listener, link); -} - -void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name) -{ - memory_region_ref(root); - memory_region_transaction_begin(); - as->ref_count = 1; - as->root = root; - as->malloced = false; - as->current_map = g_new(FlatView, 1); - flatview_init(as->current_map); - as->ioeventfd_nb = 0; - as->ioeventfds = NULL; - QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link); - as->name = g_strdup(name ? name : "anonymous"); - address_space_init_dispatch(as); - memory_region_update_pending |= root->enabled; - memory_region_transaction_commit(); -} - -static void do_address_space_destroy(AddressSpace *as) -{ - MemoryListener *listener; - bool do_free = as->malloced; - - address_space_destroy_dispatch(as); - - QTAILQ_FOREACH(listener, &memory_listeners, link) { - assert(listener->address_space_filter != as); - } - - flatview_unref(as->current_map); - g_free(as->name); - g_free(as->ioeventfds); - memory_region_unref(as->root); - if (do_free) { - g_free(as); - } -} - -AddressSpace *address_space_init_shareable(MemoryRegion *root, const char *name) -{ - AddressSpace *as; - - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - if (root == as->root && as->malloced) { - as->ref_count++; - return as; - } - } - - as = g_malloc0(sizeof *as); - address_space_init(as, root, name); - as->malloced = true; - return as; -} - -void address_space_destroy(AddressSpace *as) -{ - MemoryRegion *root = as->root; - - as->ref_count--; - if (as->ref_count) { - return; - } - /* Flush out anything from MemoryListeners listening in on this */ - memory_region_transaction_begin(); - as->root = NULL; - memory_region_transaction_commit(); - QTAILQ_REMOVE(&address_spaces, as, address_spaces_link); - address_space_unregister(as); - - /* 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); -} - -typedef struct MemoryRegionList MemoryRegionList; - -struct MemoryRegionList { - const MemoryRegion *mr; - QTAILQ_ENTRY(MemoryRegionList) queue; -}; - -typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead; - -static void mtree_print_mr(fprintf_function mon_printf, void *f, - const MemoryRegion *mr, unsigned int level, - hwaddr base, - MemoryRegionListHead *alias_print_queue) -{ - MemoryRegionList *new_ml, *ml, *next_ml; - MemoryRegionListHead submr_print_queue; - const MemoryRegion *submr; - unsigned int i; - - if (!mr) { - return; - } - - for (i = 0; i < level; i++) { - mon_printf(f, " "); - } - - if (mr->alias) { - MemoryRegionList *ml; - bool found = false; - - /* check if the alias is already in the queue */ - QTAILQ_FOREACH(ml, alias_print_queue, queue) { - if (ml->mr == mr->alias) { - found = true; - } - } - - if (!found) { - ml = g_new(MemoryRegionList, 1); - ml->mr = mr->alias; - QTAILQ_INSERT_TAIL(alias_print_queue, ml, queue); - } - mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx - " (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx - "-" TARGET_FMT_plx "%s\n", - base + mr->addr, - base + mr->addr - + (int128_nz(mr->size) ? - (hwaddr)int128_get64(int128_sub(mr->size, - int128_one())) : 0), - mr->priority, - mr->romd_mode ? 'R' : '-', - !mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W' - : '-', - memory_region_name(mr), - memory_region_name(mr->alias), - mr->alias_offset, - mr->alias_offset - + (int128_nz(mr->size) ? - (hwaddr)int128_get64(int128_sub(mr->size, - int128_one())) : 0), - mr->enabled ? "" : " [disabled]"); - } else { - mon_printf(f, - TARGET_FMT_plx "-" TARGET_FMT_plx " (prio %d, %c%c): %s%s\n", - base + mr->addr, - base + mr->addr - + (int128_nz(mr->size) ? - (hwaddr)int128_get64(int128_sub(mr->size, - int128_one())) : 0), - mr->priority, - mr->romd_mode ? 'R' : '-', - !mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W' - : '-', - memory_region_name(mr), - mr->enabled ? "" : " [disabled]"); - } - - QTAILQ_INIT(&submr_print_queue); - - QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) { - new_ml = g_new(MemoryRegionList, 1); - new_ml->mr = submr; - QTAILQ_FOREACH(ml, &submr_print_queue, queue) { - if (new_ml->mr->addr < ml->mr->addr || - (new_ml->mr->addr == ml->mr->addr && - new_ml->mr->priority > ml->mr->priority)) { - QTAILQ_INSERT_BEFORE(ml, new_ml, queue); - new_ml = NULL; - break; - } - } - if (new_ml) { - QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, queue); - } - } - - QTAILQ_FOREACH(ml, &submr_print_queue, queue) { - mtree_print_mr(mon_printf, f, ml->mr, level + 1, base + mr->addr, - alias_print_queue); - } - - QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, queue, next_ml) { - g_free(ml); - } -} - -void mtree_info(fprintf_function mon_printf, void *f) -{ - MemoryRegionListHead ml_head; - MemoryRegionList *ml, *ml2; - AddressSpace *as; - - QTAILQ_INIT(&ml_head); - - QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - mon_printf(f, "address-space: %s\n", as->name); - mtree_print_mr(mon_printf, f, as->root, 1, 0, &ml_head); - mon_printf(f, "\n"); - } - - /* print aliased regions */ - QTAILQ_FOREACH(ml, &ml_head, queue) { - mon_printf(f, "memory-region: %s\n", memory_region_name(ml->mr)); - mtree_print_mr(mon_printf, f, ml->mr, 1, 0, &ml_head); - mon_printf(f, "\n"); - } - - QTAILQ_FOREACH_SAFE(ml, &ml_head, queue, ml2) { - g_free(ml); - } -} - -static const TypeInfo memory_region_info = { - .parent = TYPE_OBJECT, - .name = TYPE_MEMORY_REGION, - .instance_size = sizeof(MemoryRegion), - .instance_init = memory_region_initfn, - .instance_finalize = memory_region_finalize, -}; - -static void memory_register_types(void) -{ - type_register_static(&memory_region_info); -} - -type_init(memory_register_types) |