3251 lines
100 KiB
C
3251 lines
100 KiB
C
/*
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* Physical memory management
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*
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* Copyright 2011 Red Hat, Inc. and/or its affiliates
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*
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* Authors:
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* Avi Kivity <avi@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "cpu.h"
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#include "exec/memory.h"
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#include "exec/address-spaces.h"
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#include "qapi/visitor.h"
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#include "qemu/bitops.h"
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#include "qemu/error-report.h"
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#include "qemu/main-loop.h"
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#include "qemu/qemu-print.h"
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#include "qom/object.h"
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#include "trace-root.h"
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#include "exec/memory-internal.h"
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#include "exec/ram_addr.h"
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#include "sysemu/kvm.h"
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#include "sysemu/runstate.h"
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#include "sysemu/tcg.h"
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#include "sysemu/accel.h"
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#include "hw/boards.h"
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#include "migration/vmstate.h"
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//#define DEBUG_UNASSIGNED
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static unsigned memory_region_transaction_depth;
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static bool memory_region_update_pending;
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static bool ioeventfd_update_pending;
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bool global_dirty_log;
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static QTAILQ_HEAD(, MemoryListener) memory_listeners
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= QTAILQ_HEAD_INITIALIZER(memory_listeners);
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static QTAILQ_HEAD(, AddressSpace) address_spaces
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= QTAILQ_HEAD_INITIALIZER(address_spaces);
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static GHashTable *flat_views;
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typedef struct AddrRange AddrRange;
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/*
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* Note that signed integers are needed for negative offsetting in aliases
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* (large MemoryRegion::alias_offset).
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*/
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struct AddrRange {
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Int128 start;
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Int128 size;
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};
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static AddrRange addrrange_make(Int128 start, Int128 size)
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{
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return (AddrRange) { start, size };
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}
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static bool addrrange_equal(AddrRange r1, AddrRange r2)
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{
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return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size);
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}
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static Int128 addrrange_end(AddrRange r)
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{
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return int128_add(r.start, r.size);
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}
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static AddrRange addrrange_shift(AddrRange range, Int128 delta)
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{
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int128_addto(&range.start, delta);
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return range;
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}
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static bool addrrange_contains(AddrRange range, Int128 addr)
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{
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return int128_ge(addr, range.start)
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&& int128_lt(addr, addrrange_end(range));
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}
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static bool addrrange_intersects(AddrRange r1, AddrRange r2)
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{
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return addrrange_contains(r1, r2.start)
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|| addrrange_contains(r2, r1.start);
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}
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static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
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{
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Int128 start = int128_max(r1.start, r2.start);
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Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2));
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return addrrange_make(start, int128_sub(end, start));
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}
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enum ListenerDirection { Forward, Reverse };
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#define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
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do { \
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MemoryListener *_listener; \
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\
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switch (_direction) { \
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case Forward: \
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QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
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if (_listener->_callback) { \
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_listener->_callback(_listener, ##_args); \
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} \
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} \
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break; \
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case Reverse: \
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QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, link) { \
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if (_listener->_callback) { \
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_listener->_callback(_listener, ##_args); \
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} \
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} \
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break; \
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default: \
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abort(); \
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} \
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} while (0)
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#define MEMORY_LISTENER_CALL(_as, _callback, _direction, _section, _args...) \
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do { \
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MemoryListener *_listener; \
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\
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switch (_direction) { \
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case Forward: \
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QTAILQ_FOREACH(_listener, &(_as)->listeners, link_as) { \
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if (_listener->_callback) { \
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_listener->_callback(_listener, _section, ##_args); \
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} \
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} \
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break; \
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case Reverse: \
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QTAILQ_FOREACH_REVERSE(_listener, &(_as)->listeners, link_as) { \
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if (_listener->_callback) { \
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_listener->_callback(_listener, _section, ##_args); \
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} \
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} \
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break; \
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default: \
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abort(); \
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} \
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} while (0)
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/* No need to ref/unref .mr, the FlatRange keeps it alive. */
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#define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback, _args...) \
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do { \
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MemoryRegionSection mrs = section_from_flat_range(fr, \
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address_space_to_flatview(as)); \
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MEMORY_LISTENER_CALL(as, callback, dir, &mrs, ##_args); \
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} while(0)
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struct CoalescedMemoryRange {
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AddrRange addr;
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QTAILQ_ENTRY(CoalescedMemoryRange) link;
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};
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struct MemoryRegionIoeventfd {
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AddrRange addr;
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bool match_data;
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uint64_t data;
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EventNotifier *e;
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};
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static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd *a,
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MemoryRegionIoeventfd *b)
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{
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if (int128_lt(a->addr.start, b->addr.start)) {
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return true;
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} else if (int128_gt(a->addr.start, b->addr.start)) {
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return false;
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} else if (int128_lt(a->addr.size, b->addr.size)) {
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return true;
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} else if (int128_gt(a->addr.size, b->addr.size)) {
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return false;
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} else if (a->match_data < b->match_data) {
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return true;
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} else if (a->match_data > b->match_data) {
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return false;
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} else if (a->match_data) {
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if (a->data < b->data) {
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return true;
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} else if (a->data > b->data) {
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return false;
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}
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}
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if (a->e < b->e) {
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return true;
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} else if (a->e > b->e) {
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return false;
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}
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return false;
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}
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static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd *a,
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MemoryRegionIoeventfd *b)
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{
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return !memory_region_ioeventfd_before(a, b)
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&& !memory_region_ioeventfd_before(b, a);
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}
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/* Range of memory in the global map. Addresses are absolute. */
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struct FlatRange {
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MemoryRegion *mr;
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hwaddr offset_in_region;
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AddrRange addr;
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uint8_t dirty_log_mask;
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bool romd_mode;
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bool readonly;
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bool nonvolatile;
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};
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#define FOR_EACH_FLAT_RANGE(var, view) \
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for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
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static inline MemoryRegionSection
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section_from_flat_range(FlatRange *fr, FlatView *fv)
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{
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return (MemoryRegionSection) {
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.mr = fr->mr,
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.fv = fv,
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.offset_within_region = fr->offset_in_region,
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.size = fr->addr.size,
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.offset_within_address_space = int128_get64(fr->addr.start),
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.readonly = fr->readonly,
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.nonvolatile = fr->nonvolatile,
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};
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}
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static bool flatrange_equal(FlatRange *a, FlatRange *b)
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{
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return a->mr == b->mr
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&& addrrange_equal(a->addr, b->addr)
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&& a->offset_in_region == b->offset_in_region
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&& a->romd_mode == b->romd_mode
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&& a->readonly == b->readonly
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&& a->nonvolatile == b->nonvolatile;
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}
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static FlatView *flatview_new(MemoryRegion *mr_root)
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{
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FlatView *view;
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view = g_new0(FlatView, 1);
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view->ref = 1;
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view->root = mr_root;
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memory_region_ref(mr_root);
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trace_flatview_new(view, mr_root);
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return view;
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}
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/* Insert a range into a given position. Caller is responsible for maintaining
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* sorting order.
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*/
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static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range)
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{
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if (view->nr == view->nr_allocated) {
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view->nr_allocated = MAX(2 * view->nr, 10);
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view->ranges = g_realloc(view->ranges,
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view->nr_allocated * sizeof(*view->ranges));
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}
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memmove(view->ranges + pos + 1, view->ranges + pos,
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(view->nr - pos) * sizeof(FlatRange));
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view->ranges[pos] = *range;
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memory_region_ref(range->mr);
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++view->nr;
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}
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static void flatview_destroy(FlatView *view)
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{
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int i;
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trace_flatview_destroy(view, view->root);
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if (view->dispatch) {
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address_space_dispatch_free(view->dispatch);
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}
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for (i = 0; i < view->nr; i++) {
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memory_region_unref(view->ranges[i].mr);
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}
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g_free(view->ranges);
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memory_region_unref(view->root);
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g_free(view);
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}
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static bool flatview_ref(FlatView *view)
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{
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return atomic_fetch_inc_nonzero(&view->ref) > 0;
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}
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void flatview_unref(FlatView *view)
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{
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if (atomic_fetch_dec(&view->ref) == 1) {
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trace_flatview_destroy_rcu(view, view->root);
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assert(view->root);
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call_rcu(view, flatview_destroy, rcu);
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}
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}
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static bool can_merge(FlatRange *r1, FlatRange *r2)
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{
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return int128_eq(addrrange_end(r1->addr), r2->addr.start)
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&& r1->mr == r2->mr
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&& int128_eq(int128_add(int128_make64(r1->offset_in_region),
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r1->addr.size),
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int128_make64(r2->offset_in_region))
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&& r1->dirty_log_mask == r2->dirty_log_mask
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&& r1->romd_mode == r2->romd_mode
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&& r1->readonly == r2->readonly
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&& r1->nonvolatile == r2->nonvolatile;
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}
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/* Attempt to simplify a view by merging adjacent ranges */
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static void flatview_simplify(FlatView *view)
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{
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unsigned i, j, k;
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i = 0;
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while (i < view->nr) {
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j = i + 1;
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while (j < view->nr
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&& can_merge(&view->ranges[j-1], &view->ranges[j])) {
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int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size);
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++j;
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}
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++i;
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for (k = i; k < j; k++) {
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memory_region_unref(view->ranges[k].mr);
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}
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memmove(&view->ranges[i], &view->ranges[j],
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(view->nr - j) * sizeof(view->ranges[j]));
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view->nr -= j - i;
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}
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}
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static bool memory_region_big_endian(MemoryRegion *mr)
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{
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#ifdef TARGET_WORDS_BIGENDIAN
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return mr->ops->endianness != DEVICE_LITTLE_ENDIAN;
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#else
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return mr->ops->endianness == DEVICE_BIG_ENDIAN;
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#endif
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}
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static void adjust_endianness(MemoryRegion *mr, uint64_t *data, MemOp op)
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{
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if ((op & MO_BSWAP) != devend_memop(mr->ops->endianness)) {
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switch (op & MO_SIZE) {
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case MO_8:
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break;
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case MO_16:
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*data = bswap16(*data);
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break;
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case MO_32:
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*data = bswap32(*data);
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break;
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case MO_64:
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*data = bswap64(*data);
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break;
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default:
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g_assert_not_reached();
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}
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}
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}
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static inline void memory_region_shift_read_access(uint64_t *value,
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signed shift,
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uint64_t mask,
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uint64_t tmp)
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{
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if (shift >= 0) {
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*value |= (tmp & mask) << shift;
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} else {
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*value |= (tmp & mask) >> -shift;
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}
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}
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static inline uint64_t memory_region_shift_write_access(uint64_t *value,
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signed shift,
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uint64_t mask)
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{
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uint64_t tmp;
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if (shift >= 0) {
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tmp = (*value >> shift) & mask;
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} else {
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tmp = (*value << -shift) & mask;
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}
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return tmp;
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}
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static hwaddr memory_region_to_absolute_addr(MemoryRegion *mr, hwaddr offset)
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{
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MemoryRegion *root;
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hwaddr abs_addr = offset;
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abs_addr += mr->addr;
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for (root = mr; root->container; ) {
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root = root->container;
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abs_addr += root->addr;
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}
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return abs_addr;
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}
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static int get_cpu_index(void)
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{
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if (current_cpu) {
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return current_cpu->cpu_index;
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}
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return -1;
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}
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static MemTxResult memory_region_read_accessor(MemoryRegion *mr,
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hwaddr addr,
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uint64_t *value,
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unsigned size,
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signed shift,
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uint64_t mask,
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MemTxAttrs attrs)
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{
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uint64_t tmp;
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tmp = mr->ops->read(mr->opaque, addr, size);
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if (mr->subpage) {
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trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size);
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} else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_READ)) {
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hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
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trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
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}
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memory_region_shift_read_access(value, shift, mask, tmp);
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return MEMTX_OK;
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}
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static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
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hwaddr addr,
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uint64_t *value,
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unsigned size,
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signed shift,
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uint64_t mask,
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MemTxAttrs attrs)
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{
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uint64_t tmp = 0;
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MemTxResult r;
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r = mr->ops->read_with_attrs(mr->opaque, addr, &tmp, size, attrs);
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if (mr->subpage) {
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trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size);
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} else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_READ)) {
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hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
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trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
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}
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memory_region_shift_read_access(value, shift, mask, tmp);
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return r;
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}
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static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
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hwaddr addr,
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uint64_t *value,
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unsigned size,
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signed shift,
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uint64_t mask,
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MemTxAttrs attrs)
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{
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uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
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if (mr->subpage) {
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trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
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} else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_WRITE)) {
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hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
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trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
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}
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mr->ops->write(mr->opaque, addr, tmp, size);
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return MEMTX_OK;
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}
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static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
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hwaddr addr,
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uint64_t *value,
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unsigned size,
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signed shift,
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uint64_t mask,
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MemTxAttrs attrs)
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{
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uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
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if (mr->subpage) {
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trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
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} else if (trace_event_get_state_backends(TRACE_MEMORY_REGION_OPS_WRITE)) {
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hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
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trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
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}
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return mr->ops->write_with_attrs(mr->opaque, addr, tmp, size, attrs);
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}
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|
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static MemTxResult access_with_adjusted_size(hwaddr addr,
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uint64_t *value,
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unsigned size,
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unsigned access_size_min,
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unsigned access_size_max,
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MemTxResult (*access_fn)
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(MemoryRegion *mr,
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hwaddr addr,
|
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uint64_t *value,
|
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unsigned size,
|
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signed shift,
|
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uint64_t mask,
|
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MemTxAttrs attrs),
|
|
MemoryRegion *mr,
|
|
MemTxAttrs attrs)
|
|
{
|
|
uint64_t access_mask;
|
|
unsigned access_size;
|
|
unsigned i;
|
|
MemTxResult r = MEMTX_OK;
|
|
|
|
if (!access_size_min) {
|
|
access_size_min = 1;
|
|
}
|
|
if (!access_size_max) {
|
|
access_size_max = 4;
|
|
}
|
|
|
|
/* FIXME: support unaligned access? */
|
|
access_size = MAX(MIN(size, access_size_max), access_size_min);
|
|
access_mask = MAKE_64BIT_MASK(0, access_size * 8);
|
|
if (memory_region_big_endian(mr)) {
|
|
for (i = 0; i < size; i += access_size) {
|
|
r |= access_fn(mr, addr + i, value, access_size,
|
|
(size - access_size - i) * 8, access_mask, attrs);
|
|
}
|
|
} else {
|
|
for (i = 0; i < size; i += access_size) {
|
|
r |= access_fn(mr, addr + i, value, access_size, i * 8,
|
|
access_mask, attrs);
|
|
}
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
|
|
{
|
|
AddressSpace *as;
|
|
|
|
while (mr->container) {
|
|
mr = mr->container;
|
|
}
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
if (mr == as->root) {
|
|
return as;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Render a memory region into the global view. Ranges in @view obscure
|
|
* ranges in @mr.
|
|
*/
|
|
static void render_memory_region(FlatView *view,
|
|
MemoryRegion *mr,
|
|
Int128 base,
|
|
AddrRange clip,
|
|
bool readonly,
|
|
bool nonvolatile)
|
|
{
|
|
MemoryRegion *subregion;
|
|
unsigned i;
|
|
hwaddr offset_in_region;
|
|
Int128 remain;
|
|
Int128 now;
|
|
FlatRange fr;
|
|
AddrRange tmp;
|
|
|
|
if (!mr->enabled) {
|
|
return;
|
|
}
|
|
|
|
int128_addto(&base, int128_make64(mr->addr));
|
|
readonly |= mr->readonly;
|
|
nonvolatile |= mr->nonvolatile;
|
|
|
|
tmp = addrrange_make(base, mr->size);
|
|
|
|
if (!addrrange_intersects(tmp, clip)) {
|
|
return;
|
|
}
|
|
|
|
clip = addrrange_intersection(tmp, clip);
|
|
|
|
if (mr->alias) {
|
|
int128_subfrom(&base, int128_make64(mr->alias->addr));
|
|
int128_subfrom(&base, int128_make64(mr->alias_offset));
|
|
render_memory_region(view, mr->alias, base, clip,
|
|
readonly, nonvolatile);
|
|
return;
|
|
}
|
|
|
|
/* Render subregions in priority order. */
|
|
QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
|
|
render_memory_region(view, subregion, base, clip,
|
|
readonly, nonvolatile);
|
|
}
|
|
|
|
if (!mr->terminates) {
|
|
return;
|
|
}
|
|
|
|
offset_in_region = int128_get64(int128_sub(clip.start, base));
|
|
base = clip.start;
|
|
remain = clip.size;
|
|
|
|
fr.mr = mr;
|
|
fr.dirty_log_mask = memory_region_get_dirty_log_mask(mr);
|
|
fr.romd_mode = mr->romd_mode;
|
|
fr.readonly = readonly;
|
|
fr.nonvolatile = nonvolatile;
|
|
|
|
/* Render the region itself into any gaps left by the current view. */
|
|
for (i = 0; i < view->nr && int128_nz(remain); ++i) {
|
|
if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
|
|
continue;
|
|
}
|
|
if (int128_lt(base, view->ranges[i].addr.start)) {
|
|
now = int128_min(remain,
|
|
int128_sub(view->ranges[i].addr.start, base));
|
|
fr.offset_in_region = offset_in_region;
|
|
fr.addr = addrrange_make(base, now);
|
|
flatview_insert(view, i, &fr);
|
|
++i;
|
|
int128_addto(&base, now);
|
|
offset_in_region += int128_get64(now);
|
|
int128_subfrom(&remain, now);
|
|
}
|
|
now = int128_sub(int128_min(int128_add(base, remain),
|
|
addrrange_end(view->ranges[i].addr)),
|
|
base);
|
|
int128_addto(&base, now);
|
|
offset_in_region += int128_get64(now);
|
|
int128_subfrom(&remain, now);
|
|
}
|
|
if (int128_nz(remain)) {
|
|
fr.offset_in_region = offset_in_region;
|
|
fr.addr = addrrange_make(base, remain);
|
|
flatview_insert(view, i, &fr);
|
|
}
|
|
}
|
|
|
|
static MemoryRegion *memory_region_get_flatview_root(MemoryRegion *mr)
|
|
{
|
|
while (mr->enabled) {
|
|
if (mr->alias) {
|
|
if (!mr->alias_offset && int128_ge(mr->size, mr->alias->size)) {
|
|
/* The alias is included in its entirety. Use it as
|
|
* the "real" root, so that we can share more FlatViews.
|
|
*/
|
|
mr = mr->alias;
|
|
continue;
|
|
}
|
|
} else if (!mr->terminates) {
|
|
unsigned int found = 0;
|
|
MemoryRegion *child, *next = NULL;
|
|
QTAILQ_FOREACH(child, &mr->subregions, subregions_link) {
|
|
if (child->enabled) {
|
|
if (++found > 1) {
|
|
next = NULL;
|
|
break;
|
|
}
|
|
if (!child->addr && int128_ge(mr->size, child->size)) {
|
|
/* A child is included in its entirety. If it's the only
|
|
* enabled one, use it in the hope of finding an alias down the
|
|
* way. This will also let us share FlatViews.
|
|
*/
|
|
next = child;
|
|
}
|
|
}
|
|
}
|
|
if (found == 0) {
|
|
return NULL;
|
|
}
|
|
if (next) {
|
|
mr = next;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
return mr;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Render a memory topology into a list of disjoint absolute ranges. */
|
|
static FlatView *generate_memory_topology(MemoryRegion *mr)
|
|
{
|
|
int i;
|
|
FlatView *view;
|
|
|
|
view = flatview_new(mr);
|
|
|
|
if (mr) {
|
|
render_memory_region(view, mr, int128_zero(),
|
|
addrrange_make(int128_zero(), int128_2_64()),
|
|
false, false);
|
|
}
|
|
flatview_simplify(view);
|
|
|
|
view->dispatch = address_space_dispatch_new(view);
|
|
for (i = 0; i < view->nr; i++) {
|
|
MemoryRegionSection mrs =
|
|
section_from_flat_range(&view->ranges[i], view);
|
|
flatview_add_to_dispatch(view, &mrs);
|
|
}
|
|
address_space_dispatch_compact(view->dispatch);
|
|
g_hash_table_replace(flat_views, mr, view);
|
|
|
|
return view;
|
|
}
|
|
|
|
static void address_space_add_del_ioeventfds(AddressSpace *as,
|
|
MemoryRegionIoeventfd *fds_new,
|
|
unsigned fds_new_nb,
|
|
MemoryRegionIoeventfd *fds_old,
|
|
unsigned fds_old_nb)
|
|
{
|
|
unsigned iold, inew;
|
|
MemoryRegionIoeventfd *fd;
|
|
MemoryRegionSection section;
|
|
|
|
/* Generate a symmetric difference of the old and new fd sets, adding
|
|
* and deleting as necessary.
|
|
*/
|
|
|
|
iold = inew = 0;
|
|
while (iold < fds_old_nb || inew < fds_new_nb) {
|
|
if (iold < fds_old_nb
|
|
&& (inew == fds_new_nb
|
|
|| memory_region_ioeventfd_before(&fds_old[iold],
|
|
&fds_new[inew]))) {
|
|
fd = &fds_old[iold];
|
|
section = (MemoryRegionSection) {
|
|
.fv = address_space_to_flatview(as),
|
|
.offset_within_address_space = int128_get64(fd->addr.start),
|
|
.size = fd->addr.size,
|
|
};
|
|
MEMORY_LISTENER_CALL(as, eventfd_del, Forward, §ion,
|
|
fd->match_data, fd->data, fd->e);
|
|
++iold;
|
|
} else if (inew < fds_new_nb
|
|
&& (iold == fds_old_nb
|
|
|| memory_region_ioeventfd_before(&fds_new[inew],
|
|
&fds_old[iold]))) {
|
|
fd = &fds_new[inew];
|
|
section = (MemoryRegionSection) {
|
|
.fv = address_space_to_flatview(as),
|
|
.offset_within_address_space = int128_get64(fd->addr.start),
|
|
.size = fd->addr.size,
|
|
};
|
|
MEMORY_LISTENER_CALL(as, eventfd_add, Reverse, §ion,
|
|
fd->match_data, fd->data, fd->e);
|
|
++inew;
|
|
} else {
|
|
++iold;
|
|
++inew;
|
|
}
|
|
}
|
|
}
|
|
|
|
FlatView *address_space_get_flatview(AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
|
|
RCU_READ_LOCK_GUARD();
|
|
do {
|
|
view = address_space_to_flatview(as);
|
|
/* If somebody has replaced as->current_map concurrently,
|
|
* flatview_ref returns false.
|
|
*/
|
|
} while (!flatview_ref(view));
|
|
return view;
|
|
}
|
|
|
|
static void address_space_update_ioeventfds(AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
unsigned ioeventfd_nb = 0;
|
|
unsigned ioeventfd_max;
|
|
MemoryRegionIoeventfd *ioeventfds;
|
|
AddrRange tmp;
|
|
unsigned i;
|
|
|
|
/*
|
|
* It is likely that the number of ioeventfds hasn't changed much, so use
|
|
* the previous size as the starting value, with some headroom to avoid
|
|
* gratuitous reallocations.
|
|
*/
|
|
ioeventfd_max = QEMU_ALIGN_UP(as->ioeventfd_nb, 4);
|
|
ioeventfds = g_new(MemoryRegionIoeventfd, ioeventfd_max);
|
|
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
for (i = 0; i < fr->mr->ioeventfd_nb; ++i) {
|
|
tmp = addrrange_shift(fr->mr->ioeventfds[i].addr,
|
|
int128_sub(fr->addr.start,
|
|
int128_make64(fr->offset_in_region)));
|
|
if (addrrange_intersects(fr->addr, tmp)) {
|
|
++ioeventfd_nb;
|
|
if (ioeventfd_nb > ioeventfd_max) {
|
|
ioeventfd_max = MAX(ioeventfd_max * 2, 4);
|
|
ioeventfds = g_realloc(ioeventfds,
|
|
ioeventfd_max * sizeof(*ioeventfds));
|
|
}
|
|
ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
|
|
ioeventfds[ioeventfd_nb-1].addr = tmp;
|
|
}
|
|
}
|
|
}
|
|
|
|
address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb,
|
|
as->ioeventfds, as->ioeventfd_nb);
|
|
|
|
g_free(as->ioeventfds);
|
|
as->ioeventfds = ioeventfds;
|
|
as->ioeventfd_nb = ioeventfd_nb;
|
|
flatview_unref(view);
|
|
}
|
|
|
|
/*
|
|
* Notify the memory listeners about the coalesced IO change events of
|
|
* range `cmr'. Only the part that has intersection of the specified
|
|
* FlatRange will be sent.
|
|
*/
|
|
static void flat_range_coalesced_io_notify(FlatRange *fr, AddressSpace *as,
|
|
CoalescedMemoryRange *cmr, bool add)
|
|
{
|
|
AddrRange tmp;
|
|
|
|
tmp = addrrange_shift(cmr->addr,
|
|
int128_sub(fr->addr.start,
|
|
int128_make64(fr->offset_in_region)));
|
|
if (!addrrange_intersects(tmp, fr->addr)) {
|
|
return;
|
|
}
|
|
tmp = addrrange_intersection(tmp, fr->addr);
|
|
|
|
if (add) {
|
|
MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, coalesced_io_add,
|
|
int128_get64(tmp.start),
|
|
int128_get64(tmp.size));
|
|
} else {
|
|
MEMORY_LISTENER_UPDATE_REGION(fr, as, Reverse, coalesced_io_del,
|
|
int128_get64(tmp.start),
|
|
int128_get64(tmp.size));
|
|
}
|
|
}
|
|
|
|
static void flat_range_coalesced_io_del(FlatRange *fr, AddressSpace *as)
|
|
{
|
|
CoalescedMemoryRange *cmr;
|
|
|
|
QTAILQ_FOREACH(cmr, &fr->mr->coalesced, link) {
|
|
flat_range_coalesced_io_notify(fr, as, cmr, false);
|
|
}
|
|
}
|
|
|
|
static void flat_range_coalesced_io_add(FlatRange *fr, AddressSpace *as)
|
|
{
|
|
MemoryRegion *mr = fr->mr;
|
|
CoalescedMemoryRange *cmr;
|
|
|
|
if (QTAILQ_EMPTY(&mr->coalesced)) {
|
|
return;
|
|
}
|
|
|
|
QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
|
|
flat_range_coalesced_io_notify(fr, as, cmr, true);
|
|
}
|
|
}
|
|
|
|
static void address_space_update_topology_pass(AddressSpace *as,
|
|
const FlatView *old_view,
|
|
const FlatView *new_view,
|
|
bool adding)
|
|
{
|
|
unsigned iold, inew;
|
|
FlatRange *frold, *frnew;
|
|
|
|
/* Generate a symmetric difference of the old and new memory maps.
|
|
* Kill ranges in the old map, and instantiate ranges in the new map.
|
|
*/
|
|
iold = inew = 0;
|
|
while (iold < old_view->nr || inew < new_view->nr) {
|
|
if (iold < old_view->nr) {
|
|
frold = &old_view->ranges[iold];
|
|
} else {
|
|
frold = NULL;
|
|
}
|
|
if (inew < new_view->nr) {
|
|
frnew = &new_view->ranges[inew];
|
|
} else {
|
|
frnew = NULL;
|
|
}
|
|
|
|
if (frold
|
|
&& (!frnew
|
|
|| int128_lt(frold->addr.start, frnew->addr.start)
|
|
|| (int128_eq(frold->addr.start, frnew->addr.start)
|
|
&& !flatrange_equal(frold, frnew)))) {
|
|
/* In old but not in new, or in both but attributes changed. */
|
|
|
|
if (!adding) {
|
|
flat_range_coalesced_io_del(frold, as);
|
|
MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del);
|
|
}
|
|
|
|
++iold;
|
|
} else if (frold && frnew && flatrange_equal(frold, frnew)) {
|
|
/* In both and unchanged (except logging may have changed) */
|
|
|
|
if (adding) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop);
|
|
if (frnew->dirty_log_mask & ~frold->dirty_log_mask) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start,
|
|
frold->dirty_log_mask,
|
|
frnew->dirty_log_mask);
|
|
}
|
|
if (frold->dirty_log_mask & ~frnew->dirty_log_mask) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop,
|
|
frold->dirty_log_mask,
|
|
frnew->dirty_log_mask);
|
|
}
|
|
}
|
|
|
|
++iold;
|
|
++inew;
|
|
} else {
|
|
/* In new */
|
|
|
|
if (adding) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add);
|
|
flat_range_coalesced_io_add(frnew, as);
|
|
}
|
|
|
|
++inew;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void flatviews_init(void)
|
|
{
|
|
static FlatView *empty_view;
|
|
|
|
if (flat_views) {
|
|
return;
|
|
}
|
|
|
|
flat_views = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL,
|
|
(GDestroyNotify) flatview_unref);
|
|
if (!empty_view) {
|
|
empty_view = generate_memory_topology(NULL);
|
|
/* We keep it alive forever in the global variable. */
|
|
flatview_ref(empty_view);
|
|
} else {
|
|
g_hash_table_replace(flat_views, NULL, empty_view);
|
|
flatview_ref(empty_view);
|
|
}
|
|
}
|
|
|
|
static void flatviews_reset(void)
|
|
{
|
|
AddressSpace *as;
|
|
|
|
if (flat_views) {
|
|
g_hash_table_unref(flat_views);
|
|
flat_views = NULL;
|
|
}
|
|
flatviews_init();
|
|
|
|
/* Render unique FVs */
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
|
|
|
|
if (g_hash_table_lookup(flat_views, physmr)) {
|
|
continue;
|
|
}
|
|
|
|
generate_memory_topology(physmr);
|
|
}
|
|
}
|
|
|
|
static void address_space_set_flatview(AddressSpace *as)
|
|
{
|
|
FlatView *old_view = address_space_to_flatview(as);
|
|
MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
|
|
FlatView *new_view = g_hash_table_lookup(flat_views, physmr);
|
|
|
|
assert(new_view);
|
|
|
|
if (old_view == new_view) {
|
|
return;
|
|
}
|
|
|
|
if (old_view) {
|
|
flatview_ref(old_view);
|
|
}
|
|
|
|
flatview_ref(new_view);
|
|
|
|
if (!QTAILQ_EMPTY(&as->listeners)) {
|
|
FlatView tmpview = { .nr = 0 }, *old_view2 = old_view;
|
|
|
|
if (!old_view2) {
|
|
old_view2 = &tmpview;
|
|
}
|
|
address_space_update_topology_pass(as, old_view2, new_view, false);
|
|
address_space_update_topology_pass(as, old_view2, new_view, true);
|
|
}
|
|
|
|
/* Writes are protected by the BQL. */
|
|
atomic_rcu_set(&as->current_map, new_view);
|
|
if (old_view) {
|
|
flatview_unref(old_view);
|
|
}
|
|
|
|
/* Note that all the old MemoryRegions are still alive up to this
|
|
* point. This relieves most MemoryListeners from the need to
|
|
* ref/unref the MemoryRegions they get---unless they use them
|
|
* outside the iothread mutex, in which case precise reference
|
|
* counting is necessary.
|
|
*/
|
|
if (old_view) {
|
|
flatview_unref(old_view);
|
|
}
|
|
}
|
|
|
|
static void address_space_update_topology(AddressSpace *as)
|
|
{
|
|
MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
|
|
|
|
flatviews_init();
|
|
if (!g_hash_table_lookup(flat_views, physmr)) {
|
|
generate_memory_topology(physmr);
|
|
}
|
|
address_space_set_flatview(as);
|
|
}
|
|
|
|
void memory_region_transaction_begin(void)
|
|
{
|
|
qemu_flush_coalesced_mmio_buffer();
|
|
++memory_region_transaction_depth;
|
|
}
|
|
|
|
void memory_region_transaction_commit(void)
|
|
{
|
|
AddressSpace *as;
|
|
|
|
assert(memory_region_transaction_depth);
|
|
assert(qemu_mutex_iothread_locked());
|
|
|
|
--memory_region_transaction_depth;
|
|
if (!memory_region_transaction_depth) {
|
|
if (memory_region_update_pending) {
|
|
flatviews_reset();
|
|
|
|
MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
address_space_set_flatview(as);
|
|
address_space_update_ioeventfds(as);
|
|
}
|
|
memory_region_update_pending = false;
|
|
ioeventfd_update_pending = false;
|
|
MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
|
|
} else if (ioeventfd_update_pending) {
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
address_space_update_ioeventfds(as);
|
|
}
|
|
ioeventfd_update_pending = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void memory_region_destructor_none(MemoryRegion *mr)
|
|
{
|
|
}
|
|
|
|
static void memory_region_destructor_ram(MemoryRegion *mr)
|
|
{
|
|
qemu_ram_free(mr->ram_block);
|
|
}
|
|
|
|
static bool memory_region_need_escape(char c)
|
|
{
|
|
return c == '/' || c == '[' || c == '\\' || c == ']';
|
|
}
|
|
|
|
static char *memory_region_escape_name(const char *name)
|
|
{
|
|
const char *p;
|
|
char *escaped, *q;
|
|
uint8_t c;
|
|
size_t bytes = 0;
|
|
|
|
for (p = name; *p; p++) {
|
|
bytes += memory_region_need_escape(*p) ? 4 : 1;
|
|
}
|
|
if (bytes == p - name) {
|
|
return g_memdup(name, bytes + 1);
|
|
}
|
|
|
|
escaped = g_malloc(bytes + 1);
|
|
for (p = name, q = escaped; *p; p++) {
|
|
c = *p;
|
|
if (unlikely(memory_region_need_escape(c))) {
|
|
*q++ = '\\';
|
|
*q++ = 'x';
|
|
*q++ = "0123456789abcdef"[c >> 4];
|
|
c = "0123456789abcdef"[c & 15];
|
|
}
|
|
*q++ = c;
|
|
}
|
|
*q = 0;
|
|
return escaped;
|
|
}
|
|
|
|
static void memory_region_do_init(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
mr->size = int128_make64(size);
|
|
if (size == UINT64_MAX) {
|
|
mr->size = int128_2_64();
|
|
}
|
|
mr->name = g_strdup(name);
|
|
mr->owner = owner;
|
|
mr->ram_block = NULL;
|
|
|
|
if (name) {
|
|
char *escaped_name = memory_region_escape_name(name);
|
|
char *name_array = g_strdup_printf("%s[*]", escaped_name);
|
|
|
|
if (!owner) {
|
|
owner = container_get(qdev_get_machine(), "/unattached");
|
|
}
|
|
|
|
object_property_add_child(owner, name_array, OBJECT(mr));
|
|
object_unref(OBJECT(mr));
|
|
g_free(name_array);
|
|
g_free(escaped_name);
|
|
}
|
|
}
|
|
|
|
void memory_region_init(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION);
|
|
memory_region_do_init(mr, owner, name, size);
|
|
}
|
|
|
|
static void memory_region_get_container(Object *obj, Visitor *v,
|
|
const char *name, void *opaque,
|
|
Error **errp)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
char *path = (char *)"";
|
|
|
|
if (mr->container) {
|
|
path = object_get_canonical_path(OBJECT(mr->container));
|
|
}
|
|
visit_type_str(v, name, &path, errp);
|
|
if (mr->container) {
|
|
g_free(path);
|
|
}
|
|
}
|
|
|
|
static Object *memory_region_resolve_container(Object *obj, void *opaque,
|
|
const char *part)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
|
|
return OBJECT(mr->container);
|
|
}
|
|
|
|
static void memory_region_get_priority(Object *obj, Visitor *v,
|
|
const char *name, void *opaque,
|
|
Error **errp)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
int32_t value = mr->priority;
|
|
|
|
visit_type_int32(v, name, &value, errp);
|
|
}
|
|
|
|
static void memory_region_get_size(Object *obj, Visitor *v, const char *name,
|
|
void *opaque, Error **errp)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
uint64_t value = memory_region_size(mr);
|
|
|
|
visit_type_uint64(v, name, &value, errp);
|
|
}
|
|
|
|
static void memory_region_initfn(Object *obj)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
ObjectProperty *op;
|
|
|
|
mr->ops = &unassigned_mem_ops;
|
|
mr->enabled = true;
|
|
mr->romd_mode = true;
|
|
mr->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);
|
|
op->resolve = memory_region_resolve_container;
|
|
|
|
object_property_add_uint64_ptr(OBJECT(mr), "addr",
|
|
&mr->addr, OBJ_PROP_FLAG_READ);
|
|
object_property_add(OBJECT(mr), "priority", "uint32",
|
|
memory_region_get_priority,
|
|
NULL, /* memory_region_set_priority */
|
|
NULL, NULL);
|
|
object_property_add(OBJECT(mr), "size", "uint64",
|
|
memory_region_get_size,
|
|
NULL, /* memory_region_set_size, */
|
|
NULL, NULL);
|
|
}
|
|
|
|
static void iommu_memory_region_initfn(Object *obj)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
|
|
mr->is_iommu = true;
|
|
}
|
|
|
|
static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
|
|
unsigned size)
|
|
{
|
|
#ifdef DEBUG_UNASSIGNED
|
|
printf("Unassigned mem read " 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)
|
|
{
|
|
if (mr->ops->valid.accepts
|
|
&& !mr->ops->valid.accepts(mr->opaque, addr, size, is_write, attrs)) {
|
|
return false;
|
|
}
|
|
|
|
if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
|
|
return false;
|
|
}
|
|
|
|
/* Treat zero as compatibility all valid */
|
|
if (!mr->ops->valid.max_access_size) {
|
|
return true;
|
|
}
|
|
|
|
if (size > mr->ops->valid.max_access_size
|
|
|| size < mr->ops->valid.min_access_size) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *pval,
|
|
unsigned size,
|
|
MemTxAttrs attrs)
|
|
{
|
|
*pval = 0;
|
|
|
|
if (mr->ops->read) {
|
|
return access_with_adjusted_size(addr, pval, size,
|
|
mr->ops->impl.min_access_size,
|
|
mr->ops->impl.max_access_size,
|
|
memory_region_read_accessor,
|
|
mr, attrs);
|
|
} else {
|
|
return access_with_adjusted_size(addr, pval, size,
|
|
mr->ops->impl.min_access_size,
|
|
mr->ops->impl.max_access_size,
|
|
memory_region_read_with_attrs_accessor,
|
|
mr, attrs);
|
|
}
|
|
}
|
|
|
|
MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *pval,
|
|
MemOp op,
|
|
MemTxAttrs attrs)
|
|
{
|
|
unsigned size = memop_size(op);
|
|
MemTxResult r;
|
|
|
|
if (!memory_region_access_valid(mr, addr, size, false, attrs)) {
|
|
*pval = unassigned_mem_read(mr, addr, size);
|
|
return MEMTX_DECODE_ERROR;
|
|
}
|
|
|
|
r = memory_region_dispatch_read1(mr, addr, pval, size, attrs);
|
|
adjust_endianness(mr, pval, op);
|
|
return r;
|
|
}
|
|
|
|
/* Return true if an eventfd was signalled */
|
|
static bool memory_region_dispatch_write_eventfds(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t data,
|
|
unsigned size,
|
|
MemTxAttrs attrs)
|
|
{
|
|
MemoryRegionIoeventfd ioeventfd = {
|
|
.addr = addrrange_make(int128_make64(addr), int128_make64(size)),
|
|
.data = data,
|
|
};
|
|
unsigned i;
|
|
|
|
for (i = 0; i < mr->ioeventfd_nb; i++) {
|
|
ioeventfd.match_data = mr->ioeventfds[i].match_data;
|
|
ioeventfd.e = mr->ioeventfds[i].e;
|
|
|
|
if (memory_region_ioeventfd_equal(&ioeventfd, &mr->ioeventfds[i])) {
|
|
event_notifier_set(ioeventfd.e);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t data,
|
|
MemOp op,
|
|
MemTxAttrs attrs)
|
|
{
|
|
unsigned size = memop_size(op);
|
|
|
|
if (!memory_region_access_valid(mr, addr, size, true, attrs)) {
|
|
unassigned_mem_write(mr, addr, data, size);
|
|
return MEMTX_DECODE_ERROR;
|
|
}
|
|
|
|
adjust_endianness(mr, &data, op);
|
|
|
|
if ((!kvm_eventfds_enabled()) &&
|
|
memory_region_dispatch_write_eventfds(mr, addr, data, size, attrs)) {
|
|
return MEMTX_OK;
|
|
}
|
|
|
|
if (mr->ops->write) {
|
|
return access_with_adjusted_size(addr, &data, size,
|
|
mr->ops->impl.min_access_size,
|
|
mr->ops->impl.max_access_size,
|
|
memory_region_write_accessor, mr,
|
|
attrs);
|
|
} else {
|
|
return
|
|
access_with_adjusted_size(addr, &data, size,
|
|
mr->ops->impl.min_access_size,
|
|
mr->ops->impl.max_access_size,
|
|
memory_region_write_with_attrs_accessor,
|
|
mr, attrs);
|
|
}
|
|
}
|
|
|
|
void memory_region_init_io(MemoryRegion *mr,
|
|
Object *owner,
|
|
const MemoryRegionOps *ops,
|
|
void *opaque,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ops = ops ? ops : &unassigned_mem_ops;
|
|
mr->opaque = opaque;
|
|
mr->terminates = true;
|
|
}
|
|
|
|
void memory_region_init_ram_nomigrate(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
Error **errp)
|
|
{
|
|
memory_region_init_ram_shared_nomigrate(mr, owner, name, size, false, errp);
|
|
}
|
|
|
|
void memory_region_init_ram_shared_nomigrate(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
bool share,
|
|
Error **errp)
|
|
{
|
|
Error *err = NULL;
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->ram_block = qemu_ram_alloc(size, share, mr, &err);
|
|
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
|
|
if (err) {
|
|
mr->size = int128_zero();
|
|
object_unparent(OBJECT(mr));
|
|
error_propagate(errp, err);
|
|
}
|
|
}
|
|
|
|
void memory_region_init_resizeable_ram(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
uint64_t max_size,
|
|
void (*resized)(const char*,
|
|
uint64_t length,
|
|
void *host),
|
|
Error **errp)
|
|
{
|
|
Error *err = NULL;
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->ram_block = qemu_ram_alloc_resizeable(size, max_size, resized,
|
|
mr, &err);
|
|
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
|
|
if (err) {
|
|
mr->size = int128_zero();
|
|
object_unparent(OBJECT(mr));
|
|
error_propagate(errp, err);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_POSIX
|
|
void memory_region_init_ram_from_file(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
uint64_t align,
|
|
uint32_t ram_flags,
|
|
const char *path,
|
|
Error **errp)
|
|
{
|
|
Error *err = NULL;
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->align = align;
|
|
mr->ram_block = qemu_ram_alloc_from_file(size, mr, ram_flags, path, &err);
|
|
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
|
|
if (err) {
|
|
mr->size = int128_zero();
|
|
object_unparent(OBJECT(mr));
|
|
error_propagate(errp, err);
|
|
}
|
|
}
|
|
|
|
void memory_region_init_ram_from_fd(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
bool share,
|
|
int fd,
|
|
Error **errp)
|
|
{
|
|
Error *err = NULL;
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->ram_block = qemu_ram_alloc_from_fd(size, mr,
|
|
share ? RAM_SHARED : 0,
|
|
fd, &err);
|
|
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
|
|
if (err) {
|
|
mr->size = int128_zero();
|
|
object_unparent(OBJECT(mr));
|
|
error_propagate(errp, err);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void memory_region_init_ram_ptr(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
void *ptr)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
|
|
|
|
/* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
|
|
assert(ptr != NULL);
|
|
mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
|
|
}
|
|
|
|
void memory_region_init_ram_device_ptr(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
void *ptr)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->ram_device = true;
|
|
mr->ops = &ram_device_mem_ops;
|
|
mr->opaque = mr;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
|
|
/* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
|
|
assert(ptr != NULL);
|
|
mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
|
|
}
|
|
|
|
void memory_region_init_alias(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
MemoryRegion *orig,
|
|
hwaddr offset,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->alias = orig;
|
|
mr->alias_offset = offset;
|
|
}
|
|
|
|
void memory_region_init_rom_nomigrate(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
Error **errp)
|
|
{
|
|
memory_region_init_ram_shared_nomigrate(mr, owner, name, size, false, errp);
|
|
mr->readonly = true;
|
|
}
|
|
|
|
void memory_region_init_rom_device_nomigrate(MemoryRegion *mr,
|
|
Object *owner,
|
|
const MemoryRegionOps *ops,
|
|
void *opaque,
|
|
const char *name,
|
|
uint64_t size,
|
|
Error **errp)
|
|
{
|
|
Error *err = NULL;
|
|
assert(ops);
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ops = ops;
|
|
mr->opaque = opaque;
|
|
mr->terminates = true;
|
|
mr->rom_device = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->ram_block = qemu_ram_alloc(size, false, mr, &err);
|
|
if (err) {
|
|
mr->size = int128_zero();
|
|
object_unparent(OBJECT(mr));
|
|
error_propagate(errp, err);
|
|
}
|
|
}
|
|
|
|
void memory_region_init_iommu(void *_iommu_mr,
|
|
size_t instance_size,
|
|
const char *mrtypename,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
struct IOMMUMemoryRegion *iommu_mr;
|
|
struct MemoryRegion *mr;
|
|
|
|
object_initialize(_iommu_mr, instance_size, mrtypename);
|
|
mr = MEMORY_REGION(_iommu_mr);
|
|
memory_region_do_init(mr, owner, name, size);
|
|
iommu_mr = IOMMU_MEMORY_REGION(mr);
|
|
mr->terminates = true; /* then re-forwards */
|
|
QLIST_INIT(&iommu_mr->iommu_notify);
|
|
iommu_mr->iommu_notify_flags = IOMMU_NOTIFIER_NONE;
|
|
}
|
|
|
|
static void memory_region_finalize(Object *obj)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
|
|
assert(!mr->container);
|
|
|
|
/* We know the region is not visible in any address space (it
|
|
* does not have a container and cannot be a root either because
|
|
* it has no references, so we can blindly clear mr->enabled.
|
|
* memory_region_set_enabled instead could trigger a transaction
|
|
* and cause an infinite loop.
|
|
*/
|
|
mr->enabled = false;
|
|
memory_region_transaction_begin();
|
|
while (!QTAILQ_EMPTY(&mr->subregions)) {
|
|
MemoryRegion *subregion = QTAILQ_FIRST(&mr->subregions);
|
|
memory_region_del_subregion(mr, subregion);
|
|
}
|
|
memory_region_transaction_commit();
|
|
|
|
mr->destructor(mr);
|
|
memory_region_clear_coalescing(mr);
|
|
g_free((char *)mr->name);
|
|
g_free(mr->ioeventfds);
|
|
}
|
|
|
|
Object *memory_region_owner(MemoryRegion *mr)
|
|
{
|
|
Object *obj = OBJECT(mr);
|
|
return obj->parent;
|
|
}
|
|
|
|
void memory_region_ref(MemoryRegion *mr)
|
|
{
|
|
/* MMIO callbacks most likely will access data that belongs
|
|
* to the owner, hence the need to ref/unref the owner whenever
|
|
* the memory region is in use.
|
|
*
|
|
* The memory region is a child of its owner. As long as the
|
|
* owner doesn't call unparent itself on the memory region,
|
|
* ref-ing the owner will also keep the memory region alive.
|
|
* Memory regions without an owner are supposed to never go away;
|
|
* we do not ref/unref them because it slows down DMA sensibly.
|
|
*/
|
|
if (mr && mr->owner) {
|
|
object_ref(mr->owner);
|
|
}
|
|
}
|
|
|
|
void memory_region_unref(MemoryRegion *mr)
|
|
{
|
|
if (mr && mr->owner) {
|
|
object_unref(mr->owner);
|
|
}
|
|
}
|
|
|
|
uint64_t memory_region_size(MemoryRegion *mr)
|
|
{
|
|
if (int128_eq(mr->size, int128_2_64())) {
|
|
return UINT64_MAX;
|
|
}
|
|
return int128_get64(mr->size);
|
|
}
|
|
|
|
const char *memory_region_name(const MemoryRegion *mr)
|
|
{
|
|
if (!mr->name) {
|
|
((MemoryRegion *)mr)->name =
|
|
object_get_canonical_path_component(OBJECT(mr));
|
|
}
|
|
return mr->name;
|
|
}
|
|
|
|
bool memory_region_is_ram_device(MemoryRegion *mr)
|
|
{
|
|
return mr->ram_device;
|
|
}
|
|
|
|
uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr)
|
|
{
|
|
uint8_t mask = mr->dirty_log_mask;
|
|
if (global_dirty_log && mr->ram_block) {
|
|
mask |= (1 << DIRTY_MEMORY_MIGRATION);
|
|
}
|
|
return mask;
|
|
}
|
|
|
|
bool memory_region_is_logging(MemoryRegion *mr, uint8_t client)
|
|
{
|
|
return memory_region_get_dirty_log_mask(mr) & (1 << client);
|
|
}
|
|
|
|
static int memory_region_update_iommu_notify_flags(IOMMUMemoryRegion *iommu_mr,
|
|
Error **errp)
|
|
{
|
|
IOMMUNotifierFlag flags = IOMMU_NOTIFIER_NONE;
|
|
IOMMUNotifier *iommu_notifier;
|
|
IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
|
|
int ret = 0;
|
|
|
|
IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) {
|
|
flags |= iommu_notifier->notifier_flags;
|
|
}
|
|
|
|
if (flags != iommu_mr->iommu_notify_flags && imrc->notify_flag_changed) {
|
|
ret = imrc->notify_flag_changed(iommu_mr,
|
|
iommu_mr->iommu_notify_flags,
|
|
flags, errp);
|
|
}
|
|
|
|
if (!ret) {
|
|
iommu_mr->iommu_notify_flags = flags;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int memory_region_register_iommu_notifier(MemoryRegion *mr,
|
|
IOMMUNotifier *n, Error **errp)
|
|
{
|
|
IOMMUMemoryRegion *iommu_mr;
|
|
int ret;
|
|
|
|
if (mr->alias) {
|
|
return memory_region_register_iommu_notifier(mr->alias, n, errp);
|
|
}
|
|
|
|
/* We need to register for at least one bitfield */
|
|
iommu_mr = IOMMU_MEMORY_REGION(mr);
|
|
assert(n->notifier_flags != IOMMU_NOTIFIER_NONE);
|
|
assert(n->start <= n->end);
|
|
assert(n->iommu_idx >= 0 &&
|
|
n->iommu_idx < memory_region_iommu_num_indexes(iommu_mr));
|
|
|
|
QLIST_INSERT_HEAD(&iommu_mr->iommu_notify, n, node);
|
|
ret = memory_region_update_iommu_notify_flags(iommu_mr, errp);
|
|
if (ret) {
|
|
QLIST_REMOVE(n, node);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion *iommu_mr)
|
|
{
|
|
IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
|
|
|
|
if (imrc->get_min_page_size) {
|
|
return imrc->get_min_page_size(iommu_mr);
|
|
}
|
|
return TARGET_PAGE_SIZE;
|
|
}
|
|
|
|
void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(iommu_mr);
|
|
IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
|
|
hwaddr addr, granularity;
|
|
IOMMUTLBEntry iotlb;
|
|
|
|
/* If the IOMMU has its own replay callback, override */
|
|
if (imrc->replay) {
|
|
imrc->replay(iommu_mr, n);
|
|
return;
|
|
}
|
|
|
|
granularity = memory_region_iommu_get_min_page_size(iommu_mr);
|
|
|
|
for (addr = 0; addr < memory_region_size(mr); addr += granularity) {
|
|
iotlb = imrc->translate(iommu_mr, addr, IOMMU_NONE, n->iommu_idx);
|
|
if (iotlb.perm != IOMMU_NONE) {
|
|
n->notify(n, &iotlb);
|
|
}
|
|
|
|
/* if (2^64 - MR size) < granularity, it's possible to get an
|
|
* infinite loop here. This should catch such a wraparound */
|
|
if ((addr + granularity) < addr) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
|
|
IOMMUNotifier *n)
|
|
{
|
|
IOMMUMemoryRegion *iommu_mr;
|
|
|
|
if (mr->alias) {
|
|
memory_region_unregister_iommu_notifier(mr->alias, n);
|
|
return;
|
|
}
|
|
QLIST_REMOVE(n, node);
|
|
iommu_mr = IOMMU_MEMORY_REGION(mr);
|
|
memory_region_update_iommu_notify_flags(iommu_mr, NULL);
|
|
}
|
|
|
|
void memory_region_notify_one(IOMMUNotifier *notifier,
|
|
IOMMUTLBEntry *entry)
|
|
{
|
|
IOMMUNotifierFlag request_flags;
|
|
hwaddr entry_end = entry->iova + entry->addr_mask;
|
|
|
|
/*
|
|
* Skip the notification if the notification does not overlap
|
|
* with registered range.
|
|
*/
|
|
if (notifier->start > entry_end || notifier->end < entry->iova) {
|
|
return;
|
|
}
|
|
|
|
assert(entry->iova >= notifier->start && entry_end <= notifier->end);
|
|
|
|
if (entry->perm & IOMMU_RW) {
|
|
request_flags = IOMMU_NOTIFIER_MAP;
|
|
} else {
|
|
request_flags = IOMMU_NOTIFIER_UNMAP;
|
|
}
|
|
|
|
if (notifier->notifier_flags & request_flags) {
|
|
notifier->notify(notifier, entry);
|
|
}
|
|
}
|
|
|
|
void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr,
|
|
int iommu_idx,
|
|
IOMMUTLBEntry entry)
|
|
{
|
|
IOMMUNotifier *iommu_notifier;
|
|
|
|
assert(memory_region_is_iommu(MEMORY_REGION(iommu_mr)));
|
|
|
|
IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) {
|
|
if (iommu_notifier->iommu_idx == iommu_idx) {
|
|
memory_region_notify_one(iommu_notifier, &entry);
|
|
}
|
|
}
|
|
}
|
|
|
|
int memory_region_iommu_get_attr(IOMMUMemoryRegion *iommu_mr,
|
|
enum IOMMUMemoryRegionAttr attr,
|
|
void *data)
|
|
{
|
|
IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
|
|
|
|
if (!imrc->get_attr) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return imrc->get_attr(iommu_mr, attr, data);
|
|
}
|
|
|
|
int memory_region_iommu_attrs_to_index(IOMMUMemoryRegion *iommu_mr,
|
|
MemTxAttrs attrs)
|
|
{
|
|
IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
|
|
|
|
if (!imrc->attrs_to_index) {
|
|
return 0;
|
|
}
|
|
|
|
return imrc->attrs_to_index(iommu_mr, attrs);
|
|
}
|
|
|
|
int memory_region_iommu_num_indexes(IOMMUMemoryRegion *iommu_mr)
|
|
{
|
|
IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
|
|
|
|
if (!imrc->num_indexes) {
|
|
return 1;
|
|
}
|
|
|
|
return imrc->num_indexes(iommu_mr);
|
|
}
|
|
|
|
void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
|
|
{
|
|
uint8_t mask = 1 << client;
|
|
uint8_t old_logging;
|
|
|
|
assert(client == DIRTY_MEMORY_VGA);
|
|
old_logging = mr->vga_logging_count;
|
|
mr->vga_logging_count += log ? 1 : -1;
|
|
if (!!old_logging == !!mr->vga_logging_count) {
|
|
return;
|
|
}
|
|
|
|
memory_region_transaction_begin();
|
|
mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask);
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size)
|
|
{
|
|
assert(mr->ram_block);
|
|
cpu_physical_memory_set_dirty_range(memory_region_get_ram_addr(mr) + addr,
|
|
size,
|
|
memory_region_get_dirty_log_mask(mr));
|
|
}
|
|
|
|
static void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
|
|
{
|
|
MemoryListener *listener;
|
|
AddressSpace *as;
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
/* If the same address space has multiple log_sync listeners, we
|
|
* visit that address space's FlatView multiple times. But because
|
|
* log_sync listeners are rare, it's still cheaper than walking each
|
|
* address space once.
|
|
*/
|
|
QTAILQ_FOREACH(listener, &memory_listeners, link) {
|
|
if (!listener->log_sync) {
|
|
continue;
|
|
}
|
|
as = listener->address_space;
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
if (fr->dirty_log_mask && (!mr || fr->mr == mr)) {
|
|
MemoryRegionSection mrs = section_from_flat_range(fr, view);
|
|
listener->log_sync(listener, &mrs);
|
|
}
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
}
|
|
|
|
void memory_region_clear_dirty_bitmap(MemoryRegion *mr, hwaddr start,
|
|
hwaddr len)
|
|
{
|
|
MemoryRegionSection mrs;
|
|
MemoryListener *listener;
|
|
AddressSpace *as;
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
hwaddr sec_start, sec_end, sec_size;
|
|
|
|
QTAILQ_FOREACH(listener, &memory_listeners, link) {
|
|
if (!listener->log_clear) {
|
|
continue;
|
|
}
|
|
as = listener->address_space;
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
if (!fr->dirty_log_mask || fr->mr != mr) {
|
|
/*
|
|
* Clear dirty bitmap operation only applies to those
|
|
* regions whose dirty logging is at least enabled
|
|
*/
|
|
continue;
|
|
}
|
|
|
|
mrs = section_from_flat_range(fr, view);
|
|
|
|
sec_start = MAX(mrs.offset_within_region, start);
|
|
sec_end = mrs.offset_within_region + int128_get64(mrs.size);
|
|
sec_end = MIN(sec_end, start + len);
|
|
|
|
if (sec_start >= sec_end) {
|
|
/*
|
|
* If this memory region section has no intersection
|
|
* with the requested range, skip.
|
|
*/
|
|
continue;
|
|
}
|
|
|
|
/* Valid case; shrink the section if needed */
|
|
mrs.offset_within_address_space +=
|
|
sec_start - mrs.offset_within_region;
|
|
mrs.offset_within_region = sec_start;
|
|
sec_size = sec_end - sec_start;
|
|
mrs.size = int128_make64(sec_size);
|
|
listener->log_clear(listener, &mrs);
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
}
|
|
|
|
DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
hwaddr size,
|
|
unsigned client)
|
|
{
|
|
DirtyBitmapSnapshot *snapshot;
|
|
assert(mr->ram_block);
|
|
memory_region_sync_dirty_bitmap(mr);
|
|
snapshot = cpu_physical_memory_snapshot_and_clear_dirty(mr, addr, size, client);
|
|
memory_global_after_dirty_log_sync();
|
|
return snapshot;
|
|
}
|
|
|
|
bool memory_region_snapshot_get_dirty(MemoryRegion *mr, DirtyBitmapSnapshot *snap,
|
|
hwaddr addr, hwaddr size)
|
|
{
|
|
assert(mr->ram_block);
|
|
return cpu_physical_memory_snapshot_get_dirty(snap,
|
|
memory_region_get_ram_addr(mr) + addr, size);
|
|
}
|
|
|
|
void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
|
|
{
|
|
if (mr->readonly != readonly) {
|
|
memory_region_transaction_begin();
|
|
mr->readonly = readonly;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
}
|
|
|
|
void memory_region_set_nonvolatile(MemoryRegion *mr, bool nonvolatile)
|
|
{
|
|
if (mr->nonvolatile != nonvolatile) {
|
|
memory_region_transaction_begin();
|
|
mr->nonvolatile = nonvolatile;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
}
|
|
|
|
void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode)
|
|
{
|
|
if (mr->romd_mode != romd_mode) {
|
|
memory_region_transaction_begin();
|
|
mr->romd_mode = romd_mode;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
}
|
|
|
|
void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size, unsigned client)
|
|
{
|
|
assert(mr->ram_block);
|
|
cpu_physical_memory_test_and_clear_dirty(
|
|
memory_region_get_ram_addr(mr) + addr, size, client);
|
|
}
|
|
|
|
int memory_region_get_fd(MemoryRegion *mr)
|
|
{
|
|
int fd;
|
|
|
|
RCU_READ_LOCK_GUARD();
|
|
while (mr->alias) {
|
|
mr = mr->alias;
|
|
}
|
|
fd = mr->ram_block->fd;
|
|
|
|
return fd;
|
|
}
|
|
|
|
void *memory_region_get_ram_ptr(MemoryRegion *mr)
|
|
{
|
|
void *ptr;
|
|
uint64_t offset = 0;
|
|
|
|
RCU_READ_LOCK_GUARD();
|
|
while (mr->alias) {
|
|
offset += mr->alias_offset;
|
|
mr = mr->alias;
|
|
}
|
|
assert(mr->ram_block);
|
|
ptr = qemu_map_ram_ptr(mr->ram_block, offset);
|
|
|
|
return ptr;
|
|
}
|
|
|
|
MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset)
|
|
{
|
|
RAMBlock *block;
|
|
|
|
block = qemu_ram_block_from_host(ptr, false, offset);
|
|
if (!block) {
|
|
return NULL;
|
|
}
|
|
|
|
return block->mr;
|
|
}
|
|
|
|
ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr)
|
|
{
|
|
return mr->ram_block ? mr->ram_block->offset : RAM_ADDR_INVALID;
|
|
}
|
|
|
|
void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, Error **errp)
|
|
{
|
|
assert(mr->ram_block);
|
|
|
|
qemu_ram_resize(mr->ram_block, newsize, errp);
|
|
}
|
|
|
|
void memory_region_msync(MemoryRegion *mr, hwaddr addr, hwaddr size)
|
|
{
|
|
if (mr->ram_block) {
|
|
qemu_ram_msync(mr->ram_block, addr, size);
|
|
}
|
|
}
|
|
|
|
void memory_region_writeback(MemoryRegion *mr, hwaddr addr, hwaddr size)
|
|
{
|
|
/*
|
|
* Might be extended case needed to cover
|
|
* different types of memory regions
|
|
*/
|
|
if (mr->dirty_log_mask) {
|
|
memory_region_msync(mr, addr, size);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Call proper memory listeners about the change on the newly
|
|
* added/removed CoalescedMemoryRange.
|
|
*/
|
|
static void memory_region_update_coalesced_range(MemoryRegion *mr,
|
|
CoalescedMemoryRange *cmr,
|
|
bool add)
|
|
{
|
|
AddressSpace *as;
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
if (fr->mr == mr) {
|
|
flat_range_coalesced_io_notify(fr, as, cmr, add);
|
|
}
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
}
|
|
|
|
void memory_region_set_coalescing(MemoryRegion *mr)
|
|
{
|
|
memory_region_clear_coalescing(mr);
|
|
memory_region_add_coalescing(mr, 0, int128_get64(mr->size));
|
|
}
|
|
|
|
void memory_region_add_coalescing(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
uint64_t size)
|
|
{
|
|
CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
|
|
|
|
cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size));
|
|
QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link);
|
|
memory_region_update_coalesced_range(mr, cmr, true);
|
|
memory_region_set_flush_coalesced(mr);
|
|
}
|
|
|
|
void memory_region_clear_coalescing(MemoryRegion *mr)
|
|
{
|
|
CoalescedMemoryRange *cmr;
|
|
|
|
if (QTAILQ_EMPTY(&mr->coalesced)) {
|
|
return;
|
|
}
|
|
|
|
qemu_flush_coalesced_mmio_buffer();
|
|
mr->flush_coalesced_mmio = false;
|
|
|
|
while (!QTAILQ_EMPTY(&mr->coalesced)) {
|
|
cmr = QTAILQ_FIRST(&mr->coalesced);
|
|
QTAILQ_REMOVE(&mr->coalesced, cmr, link);
|
|
memory_region_update_coalesced_range(mr, cmr, false);
|
|
g_free(cmr);
|
|
}
|
|
}
|
|
|
|
void memory_region_set_flush_coalesced(MemoryRegion *mr)
|
|
{
|
|
mr->flush_coalesced_mmio = true;
|
|
}
|
|
|
|
void memory_region_clear_flush_coalesced(MemoryRegion *mr)
|
|
{
|
|
qemu_flush_coalesced_mmio_buffer();
|
|
if (QTAILQ_EMPTY(&mr->coalesced)) {
|
|
mr->flush_coalesced_mmio = false;
|
|
}
|
|
}
|
|
|
|
void memory_region_clear_global_locking(MemoryRegion *mr)
|
|
{
|
|
mr->global_locking = false;
|
|
}
|
|
|
|
static bool userspace_eventfd_warning;
|
|
|
|
void memory_region_add_eventfd(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size,
|
|
bool match_data,
|
|
uint64_t data,
|
|
EventNotifier *e)
|
|
{
|
|
MemoryRegionIoeventfd mrfd = {
|
|
.addr.start = int128_make64(addr),
|
|
.addr.size = int128_make64(size),
|
|
.match_data = match_data,
|
|
.data = data,
|
|
.e = e,
|
|
};
|
|
unsigned i;
|
|
|
|
if (kvm_enabled() && (!(kvm_eventfds_enabled() ||
|
|
userspace_eventfd_warning))) {
|
|
userspace_eventfd_warning = true;
|
|
error_report("Using eventfd without MMIO binding in KVM. "
|
|
"Suboptimal performance expected");
|
|
}
|
|
|
|
if (size) {
|
|
adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE);
|
|
}
|
|
memory_region_transaction_begin();
|
|
for (i = 0; i < mr->ioeventfd_nb; ++i) {
|
|
if (memory_region_ioeventfd_before(&mrfd, &mr->ioeventfds[i])) {
|
|
break;
|
|
}
|
|
}
|
|
++mr->ioeventfd_nb;
|
|
mr->ioeventfds = g_realloc(mr->ioeventfds,
|
|
sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
|
|
memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
|
|
sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
|
|
mr->ioeventfds[i] = mrfd;
|
|
ioeventfd_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_del_eventfd(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size,
|
|
bool match_data,
|
|
uint64_t data,
|
|
EventNotifier *e)
|
|
{
|
|
MemoryRegionIoeventfd mrfd = {
|
|
.addr.start = int128_make64(addr),
|
|
.addr.size = int128_make64(size),
|
|
.match_data = match_data,
|
|
.data = data,
|
|
.e = e,
|
|
};
|
|
unsigned i;
|
|
|
|
if (size) {
|
|
adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE);
|
|
}
|
|
memory_region_transaction_begin();
|
|
for (i = 0; i < mr->ioeventfd_nb; ++i) {
|
|
if (memory_region_ioeventfd_equal(&mrfd, &mr->ioeventfds[i])) {
|
|
break;
|
|
}
|
|
}
|
|
assert(i != mr->ioeventfd_nb);
|
|
memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
|
|
sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1)));
|
|
--mr->ioeventfd_nb;
|
|
mr->ioeventfds = g_realloc(mr->ioeventfds,
|
|
sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1);
|
|
ioeventfd_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
static void memory_region_update_container_subregions(MemoryRegion *subregion)
|
|
{
|
|
MemoryRegion *mr = subregion->container;
|
|
MemoryRegion *other;
|
|
|
|
memory_region_transaction_begin();
|
|
|
|
memory_region_ref(subregion);
|
|
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
|
|
if (subregion->priority >= other->priority) {
|
|
QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
|
|
goto done;
|
|
}
|
|
}
|
|
QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
|
|
done:
|
|
memory_region_update_pending |= mr->enabled && subregion->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
static void memory_region_add_subregion_common(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion)
|
|
{
|
|
assert(!subregion->container);
|
|
subregion->container = mr;
|
|
subregion->addr = offset;
|
|
memory_region_update_container_subregions(subregion);
|
|
}
|
|
|
|
void memory_region_add_subregion(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion)
|
|
{
|
|
subregion->priority = 0;
|
|
memory_region_add_subregion_common(mr, offset, subregion);
|
|
}
|
|
|
|
void memory_region_add_subregion_overlap(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion,
|
|
int priority)
|
|
{
|
|
subregion->priority = priority;
|
|
memory_region_add_subregion_common(mr, offset, subregion);
|
|
}
|
|
|
|
void memory_region_del_subregion(MemoryRegion *mr,
|
|
MemoryRegion *subregion)
|
|
{
|
|
memory_region_transaction_begin();
|
|
assert(subregion->container == mr);
|
|
subregion->container = NULL;
|
|
QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
|
|
memory_region_unref(subregion);
|
|
memory_region_update_pending |= mr->enabled && subregion->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
|
|
{
|
|
if (enabled == mr->enabled) {
|
|
return;
|
|
}
|
|
memory_region_transaction_begin();
|
|
mr->enabled = enabled;
|
|
memory_region_update_pending = true;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_set_size(MemoryRegion *mr, uint64_t size)
|
|
{
|
|
Int128 s = int128_make64(size);
|
|
|
|
if (size == UINT64_MAX) {
|
|
s = int128_2_64();
|
|
}
|
|
if (int128_eq(s, mr->size)) {
|
|
return;
|
|
}
|
|
memory_region_transaction_begin();
|
|
mr->size = s;
|
|
memory_region_update_pending = true;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
static void memory_region_readd_subregion(MemoryRegion *mr)
|
|
{
|
|
MemoryRegion *container = mr->container;
|
|
|
|
if (container) {
|
|
memory_region_transaction_begin();
|
|
memory_region_ref(mr);
|
|
memory_region_del_subregion(container, mr);
|
|
mr->container = container;
|
|
memory_region_update_container_subregions(mr);
|
|
memory_region_unref(mr);
|
|
memory_region_transaction_commit();
|
|
}
|
|
}
|
|
|
|
void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
|
|
{
|
|
if (addr != mr->addr) {
|
|
mr->addr = addr;
|
|
memory_region_readd_subregion(mr);
|
|
}
|
|
}
|
|
|
|
void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
|
|
{
|
|
assert(mr->alias);
|
|
|
|
if (offset == mr->alias_offset) {
|
|
return;
|
|
}
|
|
|
|
memory_region_transaction_begin();
|
|
mr->alias_offset = offset;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
uint64_t memory_region_get_alignment(const MemoryRegion *mr)
|
|
{
|
|
return mr->align;
|
|
}
|
|
|
|
static int cmp_flatrange_addr(const void *addr_, const void *fr_)
|
|
{
|
|
const AddrRange *addr = addr_;
|
|
const FlatRange *fr = fr_;
|
|
|
|
if (int128_le(addrrange_end(*addr), fr->addr.start)) {
|
|
return -1;
|
|
} else if (int128_ge(addr->start, addrrange_end(fr->addr))) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static FlatRange *flatview_lookup(FlatView *view, AddrRange addr)
|
|
{
|
|
return bsearch(&addr, view->ranges, view->nr,
|
|
sizeof(FlatRange), cmp_flatrange_addr);
|
|
}
|
|
|
|
bool memory_region_is_mapped(MemoryRegion *mr)
|
|
{
|
|
return mr->container ? true : false;
|
|
}
|
|
|
|
/* Same as memory_region_find, but it does not add a reference to the
|
|
* returned region. It must be called from an RCU critical section.
|
|
*/
|
|
static MemoryRegionSection memory_region_find_rcu(MemoryRegion *mr,
|
|
hwaddr addr, uint64_t size)
|
|
{
|
|
MemoryRegionSection ret = { .mr = NULL };
|
|
MemoryRegion *root;
|
|
AddressSpace *as;
|
|
AddrRange range;
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
addr += mr->addr;
|
|
for (root = mr; root->container; ) {
|
|
root = root->container;
|
|
addr += root->addr;
|
|
}
|
|
|
|
as = memory_region_to_address_space(root);
|
|
if (!as) {
|
|
return ret;
|
|
}
|
|
range = addrrange_make(int128_make64(addr), int128_make64(size));
|
|
|
|
view = address_space_to_flatview(as);
|
|
fr = flatview_lookup(view, range);
|
|
if (!fr) {
|
|
return ret;
|
|
}
|
|
|
|
while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
|
|
--fr;
|
|
}
|
|
|
|
ret.mr = fr->mr;
|
|
ret.fv = view;
|
|
range = addrrange_intersection(range, fr->addr);
|
|
ret.offset_within_region = fr->offset_in_region;
|
|
ret.offset_within_region += int128_get64(int128_sub(range.start,
|
|
fr->addr.start));
|
|
ret.size = range.size;
|
|
ret.offset_within_address_space = int128_get64(range.start);
|
|
ret.readonly = fr->readonly;
|
|
ret.nonvolatile = fr->nonvolatile;
|
|
return ret;
|
|
}
|
|
|
|
MemoryRegionSection memory_region_find(MemoryRegion *mr,
|
|
hwaddr addr, uint64_t size)
|
|
{
|
|
MemoryRegionSection ret;
|
|
RCU_READ_LOCK_GUARD();
|
|
ret = memory_region_find_rcu(mr, addr, size);
|
|
if (ret.mr) {
|
|
memory_region_ref(ret.mr);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
bool memory_region_present(MemoryRegion *container, hwaddr addr)
|
|
{
|
|
MemoryRegion *mr;
|
|
|
|
RCU_READ_LOCK_GUARD();
|
|
mr = memory_region_find_rcu(container, addr, 1).mr;
|
|
return mr && mr != container;
|
|
}
|
|
|
|
void memory_global_dirty_log_sync(void)
|
|
{
|
|
memory_region_sync_dirty_bitmap(NULL);
|
|
}
|
|
|
|
void memory_global_after_dirty_log_sync(void)
|
|
{
|
|
MEMORY_LISTENER_CALL_GLOBAL(log_global_after_sync, Forward);
|
|
}
|
|
|
|
static VMChangeStateEntry *vmstate_change;
|
|
|
|
void memory_global_dirty_log_start(void)
|
|
{
|
|
if (vmstate_change) {
|
|
qemu_del_vm_change_state_handler(vmstate_change);
|
|
vmstate_change = NULL;
|
|
}
|
|
|
|
global_dirty_log = true;
|
|
|
|
MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward);
|
|
|
|
/* Refresh DIRTY_MEMORY_MIGRATION bit. */
|
|
memory_region_transaction_begin();
|
|
memory_region_update_pending = true;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
static void memory_global_dirty_log_do_stop(void)
|
|
{
|
|
global_dirty_log = false;
|
|
|
|
/* Refresh DIRTY_MEMORY_MIGRATION bit. */
|
|
memory_region_transaction_begin();
|
|
memory_region_update_pending = true;
|
|
memory_region_transaction_commit();
|
|
|
|
MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse);
|
|
}
|
|
|
|
static void memory_vm_change_state_handler(void *opaque, int running,
|
|
RunState state)
|
|
{
|
|
if (running) {
|
|
memory_global_dirty_log_do_stop();
|
|
|
|
if (vmstate_change) {
|
|
qemu_del_vm_change_state_handler(vmstate_change);
|
|
vmstate_change = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
void memory_global_dirty_log_stop(void)
|
|
{
|
|
if (!runstate_is_running()) {
|
|
if (vmstate_change) {
|
|
return;
|
|
}
|
|
vmstate_change = qemu_add_vm_change_state_handler(
|
|
memory_vm_change_state_handler, NULL);
|
|
return;
|
|
}
|
|
|
|
memory_global_dirty_log_do_stop();
|
|
}
|
|
|
|
static void listener_add_address_space(MemoryListener *listener,
|
|
AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
if (listener->begin) {
|
|
listener->begin(listener);
|
|
}
|
|
if (global_dirty_log) {
|
|
if (listener->log_global_start) {
|
|
listener->log_global_start(listener);
|
|
}
|
|
}
|
|
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
MemoryRegionSection section = section_from_flat_range(fr, view);
|
|
|
|
if (listener->region_add) {
|
|
listener->region_add(listener, §ion);
|
|
}
|
|
if (fr->dirty_log_mask && listener->log_start) {
|
|
listener->log_start(listener, §ion, 0, fr->dirty_log_mask);
|
|
}
|
|
}
|
|
if (listener->commit) {
|
|
listener->commit(listener);
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
|
|
static void listener_del_address_space(MemoryListener *listener,
|
|
AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
if (listener->begin) {
|
|
listener->begin(listener);
|
|
}
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
MemoryRegionSection section = section_from_flat_range(fr, view);
|
|
|
|
if (fr->dirty_log_mask && listener->log_stop) {
|
|
listener->log_stop(listener, §ion, fr->dirty_log_mask, 0);
|
|
}
|
|
if (listener->region_del) {
|
|
listener->region_del(listener, §ion);
|
|
}
|
|
}
|
|
if (listener->commit) {
|
|
listener->commit(listener);
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
|
|
void memory_listener_register(MemoryListener *listener, AddressSpace *as)
|
|
{
|
|
MemoryListener *other = NULL;
|
|
|
|
listener->address_space = as;
|
|
if (QTAILQ_EMPTY(&memory_listeners)
|
|
|| listener->priority >= QTAILQ_LAST(&memory_listeners)->priority) {
|
|
QTAILQ_INSERT_TAIL(&memory_listeners, listener, link);
|
|
} else {
|
|
QTAILQ_FOREACH(other, &memory_listeners, link) {
|
|
if (listener->priority < other->priority) {
|
|
break;
|
|
}
|
|
}
|
|
QTAILQ_INSERT_BEFORE(other, listener, link);
|
|
}
|
|
|
|
if (QTAILQ_EMPTY(&as->listeners)
|
|
|| listener->priority >= QTAILQ_LAST(&as->listeners)->priority) {
|
|
QTAILQ_INSERT_TAIL(&as->listeners, listener, link_as);
|
|
} else {
|
|
QTAILQ_FOREACH(other, &as->listeners, link_as) {
|
|
if (listener->priority < other->priority) {
|
|
break;
|
|
}
|
|
}
|
|
QTAILQ_INSERT_BEFORE(other, listener, link_as);
|
|
}
|
|
|
|
listener_add_address_space(listener, as);
|
|
}
|
|
|
|
void memory_listener_unregister(MemoryListener *listener)
|
|
{
|
|
if (!listener->address_space) {
|
|
return;
|
|
}
|
|
|
|
listener_del_address_space(listener, listener->address_space);
|
|
QTAILQ_REMOVE(&memory_listeners, listener, link);
|
|
QTAILQ_REMOVE(&listener->address_space->listeners, listener, link_as);
|
|
listener->address_space = NULL;
|
|
}
|
|
|
|
void address_space_remove_listeners(AddressSpace *as)
|
|
{
|
|
while (!QTAILQ_EMPTY(&as->listeners)) {
|
|
memory_listener_unregister(QTAILQ_FIRST(&as->listeners));
|
|
}
|
|
}
|
|
|
|
void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name)
|
|
{
|
|
memory_region_ref(root);
|
|
as->root = root;
|
|
as->current_map = NULL;
|
|
as->ioeventfd_nb = 0;
|
|
as->ioeventfds = NULL;
|
|
QTAILQ_INIT(&as->listeners);
|
|
QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link);
|
|
as->name = g_strdup(name ? name : "anonymous");
|
|
address_space_update_topology(as);
|
|
address_space_update_ioeventfds(as);
|
|
}
|
|
|
|
static void do_address_space_destroy(AddressSpace *as)
|
|
{
|
|
assert(QTAILQ_EMPTY(&as->listeners));
|
|
|
|
flatview_unref(as->current_map);
|
|
g_free(as->name);
|
|
g_free(as->ioeventfds);
|
|
memory_region_unref(as->root);
|
|
}
|
|
|
|
void address_space_destroy(AddressSpace *as)
|
|
{
|
|
MemoryRegion *root = as->root;
|
|
|
|
/* Flush out anything from MemoryListeners listening in on this */
|
|
memory_region_transaction_begin();
|
|
as->root = NULL;
|
|
memory_region_transaction_commit();
|
|
QTAILQ_REMOVE(&address_spaces, as, address_spaces_link);
|
|
|
|
/* At this point, as->dispatch and as->current_map are dummy
|
|
* entries that the guest should never use. Wait for the old
|
|
* values to expire before freeing the data.
|
|
*/
|
|
as->root = root;
|
|
call_rcu(as, do_address_space_destroy, rcu);
|
|
}
|
|
|
|
static const char *memory_region_type(MemoryRegion *mr)
|
|
{
|
|
if (mr->alias) {
|
|
return memory_region_type(mr->alias);
|
|
}
|
|
if (memory_region_is_ram_device(mr)) {
|
|
return "ramd";
|
|
} else if (memory_region_is_romd(mr)) {
|
|
return "romd";
|
|
} else if (memory_region_is_rom(mr)) {
|
|
return "rom";
|
|
} else if (memory_region_is_ram(mr)) {
|
|
return "ram";
|
|
} else {
|
|
return "i/o";
|
|
}
|
|
}
|
|
|
|
typedef struct MemoryRegionList MemoryRegionList;
|
|
|
|
struct MemoryRegionList {
|
|
const MemoryRegion *mr;
|
|
QTAILQ_ENTRY(MemoryRegionList) mrqueue;
|
|
};
|
|
|
|
typedef QTAILQ_HEAD(, MemoryRegionList) MemoryRegionListHead;
|
|
|
|
#define MR_SIZE(size) (int128_nz(size) ? (hwaddr)int128_get64( \
|
|
int128_sub((size), int128_one())) : 0)
|
|
#define MTREE_INDENT " "
|
|
|
|
static void mtree_expand_owner(const char *label, Object *obj)
|
|
{
|
|
DeviceState *dev = (DeviceState *) object_dynamic_cast(obj, TYPE_DEVICE);
|
|
|
|
qemu_printf(" %s:{%s", label, dev ? "dev" : "obj");
|
|
if (dev && dev->id) {
|
|
qemu_printf(" id=%s", dev->id);
|
|
} else {
|
|
char *canonical_path = object_get_canonical_path(obj);
|
|
if (canonical_path) {
|
|
qemu_printf(" path=%s", canonical_path);
|
|
g_free(canonical_path);
|
|
} else {
|
|
qemu_printf(" type=%s", object_get_typename(obj));
|
|
}
|
|
}
|
|
qemu_printf("}");
|
|
}
|
|
|
|
static void mtree_print_mr_owner(const MemoryRegion *mr)
|
|
{
|
|
Object *owner = mr->owner;
|
|
Object *parent = memory_region_owner((MemoryRegion *)mr);
|
|
|
|
if (!owner && !parent) {
|
|
qemu_printf(" orphan");
|
|
return;
|
|
}
|
|
if (owner) {
|
|
mtree_expand_owner("owner", owner);
|
|
}
|
|
if (parent && parent != owner) {
|
|
mtree_expand_owner("parent", parent);
|
|
}
|
|
}
|
|
|
|
static void mtree_print_mr(const MemoryRegion *mr, unsigned int level,
|
|
hwaddr base,
|
|
MemoryRegionListHead *alias_print_queue,
|
|
bool owner, bool display_disabled)
|
|
{
|
|
MemoryRegionList *new_ml, *ml, *next_ml;
|
|
MemoryRegionListHead submr_print_queue;
|
|
const MemoryRegion *submr;
|
|
unsigned int i;
|
|
hwaddr cur_start, cur_end;
|
|
|
|
if (!mr) {
|
|
return;
|
|
}
|
|
|
|
cur_start = base + mr->addr;
|
|
cur_end = cur_start + MR_SIZE(mr->size);
|
|
|
|
/*
|
|
* Try to detect overflow of memory region. This should never
|
|
* happen normally. When it happens, we dump something to warn the
|
|
* user who is observing this.
|
|
*/
|
|
if (cur_start < base || cur_end < cur_start) {
|
|
qemu_printf("[DETECTED OVERFLOW!] ");
|
|
}
|
|
|
|
if (mr->alias) {
|
|
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);
|
|
}
|
|
if (mr->enabled || display_disabled) {
|
|
for (i = 0; i < level; i++) {
|
|
qemu_printf(MTREE_INDENT);
|
|
}
|
|
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);
|
|
}
|
|
qemu_printf("\n");
|
|
}
|
|
} else {
|
|
if (mr->enabled || display_disabled) {
|
|
for (i = 0; i < level; i++) {
|
|
qemu_printf(MTREE_INDENT);
|
|
}
|
|
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, display_disabled);
|
|
}
|
|
|
|
QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, mrqueue, next_ml) {
|
|
g_free(ml);
|
|
}
|
|
}
|
|
|
|
struct FlatViewInfo {
|
|
int counter;
|
|
bool dispatch_tree;
|
|
bool owner;
|
|
AccelClass *ac;
|
|
};
|
|
|
|
static void mtree_print_flatview(gpointer key, gpointer value,
|
|
gpointer user_data)
|
|
{
|
|
FlatView *view = key;
|
|
GArray *fv_address_spaces = value;
|
|
struct FlatViewInfo *fvi = user_data;
|
|
FlatRange *range = &view->ranges[0];
|
|
MemoryRegion *mr;
|
|
int n = view->nr;
|
|
int i;
|
|
AddressSpace *as;
|
|
|
|
qemu_printf("FlatView #%d\n", fvi->counter);
|
|
++fvi->counter;
|
|
|
|
for (i = 0; i < fv_address_spaces->len; ++i) {
|
|
as = g_array_index(fv_address_spaces, AddressSpace*, i);
|
|
qemu_printf(" AS \"%s\", root: %s",
|
|
as->name, memory_region_name(as->root));
|
|
if (as->root->alias) {
|
|
qemu_printf(", alias %s", memory_region_name(as->root->alias));
|
|
}
|
|
qemu_printf("\n");
|
|
}
|
|
|
|
qemu_printf(" Root memory region: %s\n",
|
|
view->root ? memory_region_name(view->root) : "(none)");
|
|
|
|
if (n <= 0) {
|
|
qemu_printf(MTREE_INDENT "No rendered FlatView\n\n");
|
|
return;
|
|
}
|
|
|
|
while (n--) {
|
|
mr = range->mr;
|
|
if (range->offset_in_region) {
|
|
qemu_printf(MTREE_INDENT 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, bool disabled)
|
|
{
|
|
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_accel());
|
|
|
|
if (ac->has_memory) {
|
|
fvi.ac = ac;
|
|
}
|
|
|
|
/* Gather all FVs in one table */
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
view = address_space_get_flatview(as);
|
|
|
|
fv_address_spaces = g_hash_table_lookup(views, view);
|
|
if (!fv_address_spaces) {
|
|
fv_address_spaces = g_array_new(false, false, sizeof(as));
|
|
g_hash_table_insert(views, view, fv_address_spaces);
|
|
}
|
|
|
|
g_array_append_val(fv_address_spaces, as);
|
|
}
|
|
|
|
/* Print */
|
|
g_hash_table_foreach(views, mtree_print_flatview, &fvi);
|
|
|
|
/* Free */
|
|
g_hash_table_foreach_remove(views, mtree_info_flatview_free, 0);
|
|
g_hash_table_unref(views);
|
|
|
|
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, disabled);
|
|
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, disabled);
|
|
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)
|