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/*
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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 "exec/memory.h" |
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#include "exec/address-spaces.h" |
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#include "exec/ioport.h" |
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#include "qemu/bitops.h" |
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#include "sysemu/kvm.h" |
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#include <assert.h> |
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#include "exec/memory-internal.h" |
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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 global_dirty_log = false; |
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|
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static QTAILQ_HEAD(memory_listeners, 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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typedef struct AddrRange AddrRange; |
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/*
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* Note using signed integers limits us to physical addresses at most
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* 63 bits wide. They 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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static bool memory_listener_match(MemoryListener *listener, |
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MemoryRegionSection *section) |
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{ |
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return !listener->address_space_filter
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|| listener->address_space_filter == section->address_space; |
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} |
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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, \ |
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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(_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, &memory_listeners, link) { \ |
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if (_listener->_callback \
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&& memory_listener_match(_listener, _section)) { \ |
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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, &memory_listeners, \ |
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memory_listeners, link) { \ |
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if (_listener->_callback \
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&& memory_listener_match(_listener, _section)) { \ |
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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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#define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \
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MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \ |
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.mr = (fr)->mr, \ |
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.address_space = (as), \ |
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.offset_within_region = (fr)->offset_in_region, \ |
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.size = int128_get64((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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})) |
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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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typedef struct FlatRange FlatRange; |
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typedef struct FlatView FlatView; |
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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 readable;
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bool readonly;
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}; |
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/* Flattened global view of current active memory hierarchy. Kept in sorted
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* order.
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*/
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struct FlatView {
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FlatRange *ranges; |
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unsigned nr;
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unsigned nr_allocated;
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}; |
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typedef struct AddressSpaceOps AddressSpaceOps; |
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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 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->readable == b->readable |
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&& a->readonly == b->readonly; |
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} |
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static void flatview_init(FlatView *view) |
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{ |
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view->ranges = NULL;
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view->nr = 0;
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view->nr_allocated = 0;
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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; |
263 |
++view->nr; |
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} |
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static void flatview_destroy(FlatView *view) |
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{ |
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g_free(view->ranges); |
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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->readable == r2->readable |
280 |
&& r1->readonly == r2->readonly; |
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} |
282 |
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/* Attempt to simplify a view by merging ajacent ranges */
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static void flatview_simplify(FlatView *view) |
285 |
{ |
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unsigned i, j;
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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; |
295 |
} |
296 |
++i; |
297 |
memmove(&view->ranges[i], &view->ranges[j], |
298 |
(view->nr - j) * sizeof(view->ranges[j]));
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view->nr -= j - i; |
300 |
} |
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} |
302 |
|
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static void memory_region_read_accessor(void *opaque, |
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hwaddr addr, |
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uint64_t *value, |
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unsigned size,
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unsigned shift,
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uint64_t mask) |
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{ |
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MemoryRegion *mr = opaque; |
311 |
uint64_t tmp; |
312 |
|
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if (mr->flush_coalesced_mmio) {
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qemu_flush_coalesced_mmio_buffer(); |
315 |
} |
316 |
tmp = mr->ops->read(mr->opaque, addr, size); |
317 |
*value |= (tmp & mask) << shift; |
318 |
} |
319 |
|
320 |
static void memory_region_write_accessor(void *opaque, |
321 |
hwaddr addr, |
322 |
uint64_t *value, |
323 |
unsigned size,
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unsigned shift,
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uint64_t mask) |
326 |
{ |
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MemoryRegion *mr = opaque; |
328 |
uint64_t tmp; |
329 |
|
330 |
if (mr->flush_coalesced_mmio) {
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qemu_flush_coalesced_mmio_buffer(); |
332 |
} |
333 |
tmp = (*value >> shift) & mask; |
334 |
mr->ops->write(mr->opaque, addr, tmp, size); |
335 |
} |
336 |
|
337 |
static void access_with_adjusted_size(hwaddr addr, |
338 |
uint64_t *value, |
339 |
unsigned size,
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340 |
unsigned access_size_min,
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341 |
unsigned access_size_max,
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342 |
void (*access)(void *opaque, |
343 |
hwaddr addr, |
344 |
uint64_t *value, |
345 |
unsigned size,
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346 |
unsigned shift,
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347 |
uint64_t mask), |
348 |
void *opaque)
|
349 |
{ |
350 |
uint64_t access_mask; |
351 |
unsigned access_size;
|
352 |
unsigned i;
|
353 |
|
354 |
if (!access_size_min) {
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355 |
access_size_min = 1;
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356 |
} |
357 |
if (!access_size_max) {
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358 |
access_size_max = 4;
|
359 |
} |
360 |
access_size = MAX(MIN(size, access_size_max), access_size_min); |
361 |
access_mask = -1ULL >> (64 - access_size * 8); |
362 |
for (i = 0; i < size; i += access_size) { |
363 |
/* FIXME: big-endian support */
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364 |
access(opaque, addr + i, value, access_size, i * 8, access_mask);
|
365 |
} |
366 |
} |
367 |
|
368 |
static const MemoryRegionPortio *find_portio(MemoryRegion *mr, uint64_t offset, |
369 |
unsigned width, bool write) |
370 |
{ |
371 |
const MemoryRegionPortio *mrp;
|
372 |
|
373 |
for (mrp = mr->ops->old_portio; mrp->size; ++mrp) {
|
374 |
if (offset >= mrp->offset && offset < mrp->offset + mrp->len
|
375 |
&& width == mrp->size |
376 |
&& (write ? (bool)mrp->write : (bool)mrp->read)) { |
377 |
return mrp;
|
378 |
} |
379 |
} |
380 |
return NULL; |
381 |
} |
382 |
|
383 |
static void memory_region_iorange_read(IORange *iorange, |
384 |
uint64_t offset, |
385 |
unsigned width,
|
386 |
uint64_t *data) |
387 |
{ |
388 |
MemoryRegionIORange *mrio |
389 |
= container_of(iorange, MemoryRegionIORange, iorange); |
390 |
MemoryRegion *mr = mrio->mr; |
391 |
|
392 |
offset += mrio->offset; |
393 |
if (mr->ops->old_portio) {
|
394 |
const MemoryRegionPortio *mrp = find_portio(mr, offset - mrio->offset,
|
395 |
width, false);
|
396 |
|
397 |
*data = ((uint64_t)1 << (width * 8)) - 1; |
398 |
if (mrp) {
|
399 |
*data = mrp->read(mr->opaque, offset); |
400 |
} else if (width == 2) { |
401 |
mrp = find_portio(mr, offset - mrio->offset, 1, false); |
402 |
assert(mrp); |
403 |
*data = mrp->read(mr->opaque, offset) | |
404 |
(mrp->read(mr->opaque, offset + 1) << 8); |
405 |
} |
406 |
return;
|
407 |
} |
408 |
*data = 0;
|
409 |
access_with_adjusted_size(offset, data, width, |
410 |
mr->ops->impl.min_access_size, |
411 |
mr->ops->impl.max_access_size, |
412 |
memory_region_read_accessor, mr); |
413 |
} |
414 |
|
415 |
static void memory_region_iorange_write(IORange *iorange, |
416 |
uint64_t offset, |
417 |
unsigned width,
|
418 |
uint64_t data) |
419 |
{ |
420 |
MemoryRegionIORange *mrio |
421 |
= container_of(iorange, MemoryRegionIORange, iorange); |
422 |
MemoryRegion *mr = mrio->mr; |
423 |
|
424 |
offset += mrio->offset; |
425 |
if (mr->ops->old_portio) {
|
426 |
const MemoryRegionPortio *mrp = find_portio(mr, offset - mrio->offset,
|
427 |
width, true);
|
428 |
|
429 |
if (mrp) {
|
430 |
mrp->write(mr->opaque, offset, data); |
431 |
} else if (width == 2) { |
432 |
mrp = find_portio(mr, offset - mrio->offset, 1, true); |
433 |
assert(mrp); |
434 |
mrp->write(mr->opaque, offset, data & 0xff);
|
435 |
mrp->write(mr->opaque, offset + 1, data >> 8); |
436 |
} |
437 |
return;
|
438 |
} |
439 |
access_with_adjusted_size(offset, &data, width, |
440 |
mr->ops->impl.min_access_size, |
441 |
mr->ops->impl.max_access_size, |
442 |
memory_region_write_accessor, mr); |
443 |
} |
444 |
|
445 |
static void memory_region_iorange_destructor(IORange *iorange) |
446 |
{ |
447 |
g_free(container_of(iorange, MemoryRegionIORange, iorange)); |
448 |
} |
449 |
|
450 |
const IORangeOps memory_region_iorange_ops = {
|
451 |
.read = memory_region_iorange_read, |
452 |
.write = memory_region_iorange_write, |
453 |
.destructor = memory_region_iorange_destructor, |
454 |
}; |
455 |
|
456 |
static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
|
457 |
{ |
458 |
AddressSpace *as; |
459 |
|
460 |
while (mr->parent) {
|
461 |
mr = mr->parent; |
462 |
} |
463 |
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
464 |
if (mr == as->root) {
|
465 |
return as;
|
466 |
} |
467 |
} |
468 |
abort(); |
469 |
} |
470 |
|
471 |
/* Render a memory region into the global view. Ranges in @view obscure
|
472 |
* ranges in @mr.
|
473 |
*/
|
474 |
static void render_memory_region(FlatView *view, |
475 |
MemoryRegion *mr, |
476 |
Int128 base, |
477 |
AddrRange clip, |
478 |
bool readonly)
|
479 |
{ |
480 |
MemoryRegion *subregion; |
481 |
unsigned i;
|
482 |
hwaddr offset_in_region; |
483 |
Int128 remain; |
484 |
Int128 now; |
485 |
FlatRange fr; |
486 |
AddrRange tmp; |
487 |
|
488 |
if (!mr->enabled) {
|
489 |
return;
|
490 |
} |
491 |
|
492 |
int128_addto(&base, int128_make64(mr->addr)); |
493 |
readonly |= mr->readonly; |
494 |
|
495 |
tmp = addrrange_make(base, mr->size); |
496 |
|
497 |
if (!addrrange_intersects(tmp, clip)) {
|
498 |
return;
|
499 |
} |
500 |
|
501 |
clip = addrrange_intersection(tmp, clip); |
502 |
|
503 |
if (mr->alias) {
|
504 |
int128_subfrom(&base, int128_make64(mr->alias->addr)); |
505 |
int128_subfrom(&base, int128_make64(mr->alias_offset)); |
506 |
render_memory_region(view, mr->alias, base, clip, readonly); |
507 |
return;
|
508 |
} |
509 |
|
510 |
/* Render subregions in priority order. */
|
511 |
QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) { |
512 |
render_memory_region(view, subregion, base, clip, readonly); |
513 |
} |
514 |
|
515 |
if (!mr->terminates) {
|
516 |
return;
|
517 |
} |
518 |
|
519 |
offset_in_region = int128_get64(int128_sub(clip.start, base)); |
520 |
base = clip.start; |
521 |
remain = clip.size; |
522 |
|
523 |
/* Render the region itself into any gaps left by the current view. */
|
524 |
for (i = 0; i < view->nr && int128_nz(remain); ++i) { |
525 |
if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
|
526 |
continue;
|
527 |
} |
528 |
if (int128_lt(base, view->ranges[i].addr.start)) {
|
529 |
now = int128_min(remain, |
530 |
int128_sub(view->ranges[i].addr.start, base)); |
531 |
fr.mr = mr; |
532 |
fr.offset_in_region = offset_in_region; |
533 |
fr.addr = addrrange_make(base, now); |
534 |
fr.dirty_log_mask = mr->dirty_log_mask; |
535 |
fr.readable = mr->readable; |
536 |
fr.readonly = readonly; |
537 |
flatview_insert(view, i, &fr); |
538 |
++i; |
539 |
int128_addto(&base, now); |
540 |
offset_in_region += int128_get64(now); |
541 |
int128_subfrom(&remain, now); |
542 |
} |
543 |
now = int128_sub(int128_min(int128_add(base, remain), |
544 |
addrrange_end(view->ranges[i].addr)), |
545 |
base); |
546 |
int128_addto(&base, now); |
547 |
offset_in_region += int128_get64(now); |
548 |
int128_subfrom(&remain, now); |
549 |
} |
550 |
if (int128_nz(remain)) {
|
551 |
fr.mr = mr; |
552 |
fr.offset_in_region = offset_in_region; |
553 |
fr.addr = addrrange_make(base, remain); |
554 |
fr.dirty_log_mask = mr->dirty_log_mask; |
555 |
fr.readable = mr->readable; |
556 |
fr.readonly = readonly; |
557 |
flatview_insert(view, i, &fr); |
558 |
} |
559 |
} |
560 |
|
561 |
/* Render a memory topology into a list of disjoint absolute ranges. */
|
562 |
static FlatView generate_memory_topology(MemoryRegion *mr)
|
563 |
{ |
564 |
FlatView view; |
565 |
|
566 |
flatview_init(&view); |
567 |
|
568 |
if (mr) {
|
569 |
render_memory_region(&view, mr, int128_zero(), |
570 |
addrrange_make(int128_zero(), int128_2_64()), false);
|
571 |
} |
572 |
flatview_simplify(&view); |
573 |
|
574 |
return view;
|
575 |
} |
576 |
|
577 |
static void address_space_add_del_ioeventfds(AddressSpace *as, |
578 |
MemoryRegionIoeventfd *fds_new, |
579 |
unsigned fds_new_nb,
|
580 |
MemoryRegionIoeventfd *fds_old, |
581 |
unsigned fds_old_nb)
|
582 |
{ |
583 |
unsigned iold, inew;
|
584 |
MemoryRegionIoeventfd *fd; |
585 |
MemoryRegionSection section; |
586 |
|
587 |
/* Generate a symmetric difference of the old and new fd sets, adding
|
588 |
* and deleting as necessary.
|
589 |
*/
|
590 |
|
591 |
iold = inew = 0;
|
592 |
while (iold < fds_old_nb || inew < fds_new_nb) {
|
593 |
if (iold < fds_old_nb
|
594 |
&& (inew == fds_new_nb |
595 |
|| memory_region_ioeventfd_before(fds_old[iold], |
596 |
fds_new[inew]))) { |
597 |
fd = &fds_old[iold]; |
598 |
section = (MemoryRegionSection) { |
599 |
.address_space = as, |
600 |
.offset_within_address_space = int128_get64(fd->addr.start), |
601 |
.size = int128_get64(fd->addr.size), |
602 |
}; |
603 |
MEMORY_LISTENER_CALL(eventfd_del, Forward, §ion, |
604 |
fd->match_data, fd->data, fd->e); |
605 |
++iold; |
606 |
} else if (inew < fds_new_nb |
607 |
&& (iold == fds_old_nb |
608 |
|| memory_region_ioeventfd_before(fds_new[inew], |
609 |
fds_old[iold]))) { |
610 |
fd = &fds_new[inew]; |
611 |
section = (MemoryRegionSection) { |
612 |
.address_space = as, |
613 |
.offset_within_address_space = int128_get64(fd->addr.start), |
614 |
.size = int128_get64(fd->addr.size), |
615 |
}; |
616 |
MEMORY_LISTENER_CALL(eventfd_add, Reverse, §ion, |
617 |
fd->match_data, fd->data, fd->e); |
618 |
++inew; |
619 |
} else {
|
620 |
++iold; |
621 |
++inew; |
622 |
} |
623 |
} |
624 |
} |
625 |
|
626 |
static void address_space_update_ioeventfds(AddressSpace *as) |
627 |
{ |
628 |
FlatRange *fr; |
629 |
unsigned ioeventfd_nb = 0; |
630 |
MemoryRegionIoeventfd *ioeventfds = NULL;
|
631 |
AddrRange tmp; |
632 |
unsigned i;
|
633 |
|
634 |
FOR_EACH_FLAT_RANGE(fr, as->current_map) { |
635 |
for (i = 0; i < fr->mr->ioeventfd_nb; ++i) { |
636 |
tmp = addrrange_shift(fr->mr->ioeventfds[i].addr, |
637 |
int128_sub(fr->addr.start, |
638 |
int128_make64(fr->offset_in_region))); |
639 |
if (addrrange_intersects(fr->addr, tmp)) {
|
640 |
++ioeventfd_nb; |
641 |
ioeventfds = g_realloc(ioeventfds, |
642 |
ioeventfd_nb * sizeof(*ioeventfds));
|
643 |
ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
|
644 |
ioeventfds[ioeventfd_nb-1].addr = tmp;
|
645 |
} |
646 |
} |
647 |
} |
648 |
|
649 |
address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb, |
650 |
as->ioeventfds, as->ioeventfd_nb); |
651 |
|
652 |
g_free(as->ioeventfds); |
653 |
as->ioeventfds = ioeventfds; |
654 |
as->ioeventfd_nb = ioeventfd_nb; |
655 |
} |
656 |
|
657 |
static void address_space_update_topology_pass(AddressSpace *as, |
658 |
FlatView old_view, |
659 |
FlatView new_view, |
660 |
bool adding)
|
661 |
{ |
662 |
unsigned iold, inew;
|
663 |
FlatRange *frold, *frnew; |
664 |
|
665 |
/* Generate a symmetric difference of the old and new memory maps.
|
666 |
* Kill ranges in the old map, and instantiate ranges in the new map.
|
667 |
*/
|
668 |
iold = inew = 0;
|
669 |
while (iold < old_view.nr || inew < new_view.nr) {
|
670 |
if (iold < old_view.nr) {
|
671 |
frold = &old_view.ranges[iold]; |
672 |
} else {
|
673 |
frold = NULL;
|
674 |
} |
675 |
if (inew < new_view.nr) {
|
676 |
frnew = &new_view.ranges[inew]; |
677 |
} else {
|
678 |
frnew = NULL;
|
679 |
} |
680 |
|
681 |
if (frold
|
682 |
&& (!frnew |
683 |
|| int128_lt(frold->addr.start, frnew->addr.start) |
684 |
|| (int128_eq(frold->addr.start, frnew->addr.start) |
685 |
&& !flatrange_equal(frold, frnew)))) { |
686 |
/* In old, but (not in new, or in new but attributes changed). */
|
687 |
|
688 |
if (!adding) {
|
689 |
MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del); |
690 |
} |
691 |
|
692 |
++iold; |
693 |
} else if (frold && frnew && flatrange_equal(frold, frnew)) { |
694 |
/* In both (logging may have changed) */
|
695 |
|
696 |
if (adding) {
|
697 |
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop); |
698 |
if (frold->dirty_log_mask && !frnew->dirty_log_mask) {
|
699 |
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop); |
700 |
} else if (frnew->dirty_log_mask && !frold->dirty_log_mask) { |
701 |
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start); |
702 |
} |
703 |
} |
704 |
|
705 |
++iold; |
706 |
++inew; |
707 |
} else {
|
708 |
/* In new */
|
709 |
|
710 |
if (adding) {
|
711 |
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add); |
712 |
} |
713 |
|
714 |
++inew; |
715 |
} |
716 |
} |
717 |
} |
718 |
|
719 |
|
720 |
static void address_space_update_topology(AddressSpace *as) |
721 |
{ |
722 |
FlatView old_view = *as->current_map; |
723 |
FlatView new_view = generate_memory_topology(as->root); |
724 |
|
725 |
address_space_update_topology_pass(as, old_view, new_view, false);
|
726 |
address_space_update_topology_pass(as, old_view, new_view, true);
|
727 |
|
728 |
*as->current_map = new_view; |
729 |
flatview_destroy(&old_view); |
730 |
address_space_update_ioeventfds(as); |
731 |
} |
732 |
|
733 |
void memory_region_transaction_begin(void) |
734 |
{ |
735 |
qemu_flush_coalesced_mmio_buffer(); |
736 |
++memory_region_transaction_depth; |
737 |
} |
738 |
|
739 |
void memory_region_transaction_commit(void) |
740 |
{ |
741 |
AddressSpace *as; |
742 |
|
743 |
assert(memory_region_transaction_depth); |
744 |
--memory_region_transaction_depth; |
745 |
if (!memory_region_transaction_depth && memory_region_update_pending) {
|
746 |
memory_region_update_pending = false;
|
747 |
MEMORY_LISTENER_CALL_GLOBAL(begin, Forward); |
748 |
|
749 |
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
750 |
address_space_update_topology(as); |
751 |
} |
752 |
|
753 |
MEMORY_LISTENER_CALL_GLOBAL(commit, Forward); |
754 |
} |
755 |
} |
756 |
|
757 |
static void memory_region_destructor_none(MemoryRegion *mr) |
758 |
{ |
759 |
} |
760 |
|
761 |
static void memory_region_destructor_ram(MemoryRegion *mr) |
762 |
{ |
763 |
qemu_ram_free(mr->ram_addr); |
764 |
} |
765 |
|
766 |
static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr) |
767 |
{ |
768 |
qemu_ram_free_from_ptr(mr->ram_addr); |
769 |
} |
770 |
|
771 |
static void memory_region_destructor_iomem(MemoryRegion *mr) |
772 |
{ |
773 |
} |
774 |
|
775 |
static void memory_region_destructor_rom_device(MemoryRegion *mr) |
776 |
{ |
777 |
qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK); |
778 |
} |
779 |
|
780 |
static bool memory_region_wrong_endianness(MemoryRegion *mr) |
781 |
{ |
782 |
#ifdef TARGET_WORDS_BIGENDIAN
|
783 |
return mr->ops->endianness == DEVICE_LITTLE_ENDIAN;
|
784 |
#else
|
785 |
return mr->ops->endianness == DEVICE_BIG_ENDIAN;
|
786 |
#endif
|
787 |
} |
788 |
|
789 |
void memory_region_init(MemoryRegion *mr,
|
790 |
const char *name, |
791 |
uint64_t size) |
792 |
{ |
793 |
mr->ops = NULL;
|
794 |
mr->parent = NULL;
|
795 |
mr->size = int128_make64(size); |
796 |
if (size == UINT64_MAX) {
|
797 |
mr->size = int128_2_64(); |
798 |
} |
799 |
mr->addr = 0;
|
800 |
mr->subpage = false;
|
801 |
mr->enabled = true;
|
802 |
mr->terminates = false;
|
803 |
mr->ram = false;
|
804 |
mr->readable = true;
|
805 |
mr->readonly = false;
|
806 |
mr->rom_device = false;
|
807 |
mr->destructor = memory_region_destructor_none; |
808 |
mr->priority = 0;
|
809 |
mr->may_overlap = false;
|
810 |
mr->alias = NULL;
|
811 |
QTAILQ_INIT(&mr->subregions); |
812 |
memset(&mr->subregions_link, 0, sizeof mr->subregions_link); |
813 |
QTAILQ_INIT(&mr->coalesced); |
814 |
mr->name = g_strdup(name); |
815 |
mr->dirty_log_mask = 0;
|
816 |
mr->ioeventfd_nb = 0;
|
817 |
mr->ioeventfds = NULL;
|
818 |
mr->flush_coalesced_mmio = false;
|
819 |
} |
820 |
|
821 |
static bool memory_region_access_valid(MemoryRegion *mr, |
822 |
hwaddr addr, |
823 |
unsigned size,
|
824 |
bool is_write)
|
825 |
{ |
826 |
if (mr->ops->valid.accepts
|
827 |
&& !mr->ops->valid.accepts(mr->opaque, addr, size, is_write)) { |
828 |
return false; |
829 |
} |
830 |
|
831 |
if (!mr->ops->valid.unaligned && (addr & (size - 1))) { |
832 |
return false; |
833 |
} |
834 |
|
835 |
/* Treat zero as compatibility all valid */
|
836 |
if (!mr->ops->valid.max_access_size) {
|
837 |
return true; |
838 |
} |
839 |
|
840 |
if (size > mr->ops->valid.max_access_size
|
841 |
|| size < mr->ops->valid.min_access_size) { |
842 |
return false; |
843 |
} |
844 |
return true; |
845 |
} |
846 |
|
847 |
static uint64_t memory_region_dispatch_read1(MemoryRegion *mr,
|
848 |
hwaddr addr, |
849 |
unsigned size)
|
850 |
{ |
851 |
uint64_t data = 0;
|
852 |
|
853 |
if (!memory_region_access_valid(mr, addr, size, false)) { |
854 |
return -1U; /* FIXME: better signalling */ |
855 |
} |
856 |
|
857 |
if (!mr->ops->read) {
|
858 |
return mr->ops->old_mmio.read[bitops_ffsl(size)](mr->opaque, addr);
|
859 |
} |
860 |
|
861 |
/* FIXME: support unaligned access */
|
862 |
access_with_adjusted_size(addr, &data, size, |
863 |
mr->ops->impl.min_access_size, |
864 |
mr->ops->impl.max_access_size, |
865 |
memory_region_read_accessor, mr); |
866 |
|
867 |
return data;
|
868 |
} |
869 |
|
870 |
static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size) |
871 |
{ |
872 |
if (memory_region_wrong_endianness(mr)) {
|
873 |
switch (size) {
|
874 |
case 1: |
875 |
break;
|
876 |
case 2: |
877 |
*data = bswap16(*data); |
878 |
break;
|
879 |
case 4: |
880 |
*data = bswap32(*data); |
881 |
break;
|
882 |
default:
|
883 |
abort(); |
884 |
} |
885 |
} |
886 |
} |
887 |
|
888 |
static uint64_t memory_region_dispatch_read(MemoryRegion *mr,
|
889 |
hwaddr addr, |
890 |
unsigned size)
|
891 |
{ |
892 |
uint64_t ret; |
893 |
|
894 |
ret = memory_region_dispatch_read1(mr, addr, size); |
895 |
adjust_endianness(mr, &ret, size); |
896 |
return ret;
|
897 |
} |
898 |
|
899 |
static void memory_region_dispatch_write(MemoryRegion *mr, |
900 |
hwaddr addr, |
901 |
uint64_t data, |
902 |
unsigned size)
|
903 |
{ |
904 |
if (!memory_region_access_valid(mr, addr, size, true)) { |
905 |
return; /* FIXME: better signalling */ |
906 |
} |
907 |
|
908 |
adjust_endianness(mr, &data, size); |
909 |
|
910 |
if (!mr->ops->write) {
|
911 |
mr->ops->old_mmio.write[bitops_ffsl(size)](mr->opaque, addr, data); |
912 |
return;
|
913 |
} |
914 |
|
915 |
/* FIXME: support unaligned access */
|
916 |
access_with_adjusted_size(addr, &data, size, |
917 |
mr->ops->impl.min_access_size, |
918 |
mr->ops->impl.max_access_size, |
919 |
memory_region_write_accessor, mr); |
920 |
} |
921 |
|
922 |
void memory_region_init_io(MemoryRegion *mr,
|
923 |
const MemoryRegionOps *ops,
|
924 |
void *opaque,
|
925 |
const char *name, |
926 |
uint64_t size) |
927 |
{ |
928 |
memory_region_init(mr, name, size); |
929 |
mr->ops = ops; |
930 |
mr->opaque = opaque; |
931 |
mr->terminates = true;
|
932 |
mr->destructor = memory_region_destructor_iomem; |
933 |
mr->ram_addr = ~(ram_addr_t)0;
|
934 |
} |
935 |
|
936 |
void memory_region_init_ram(MemoryRegion *mr,
|
937 |
const char *name, |
938 |
uint64_t size) |
939 |
{ |
940 |
memory_region_init(mr, name, size); |
941 |
mr->ram = true;
|
942 |
mr->terminates = true;
|
943 |
mr->destructor = memory_region_destructor_ram; |
944 |
mr->ram_addr = qemu_ram_alloc(size, mr); |
945 |
} |
946 |
|
947 |
void memory_region_init_ram_ptr(MemoryRegion *mr,
|
948 |
const char *name, |
949 |
uint64_t size, |
950 |
void *ptr)
|
951 |
{ |
952 |
memory_region_init(mr, name, size); |
953 |
mr->ram = true;
|
954 |
mr->terminates = true;
|
955 |
mr->destructor = memory_region_destructor_ram_from_ptr; |
956 |
mr->ram_addr = qemu_ram_alloc_from_ptr(size, ptr, mr); |
957 |
} |
958 |
|
959 |
void memory_region_init_alias(MemoryRegion *mr,
|
960 |
const char *name, |
961 |
MemoryRegion *orig, |
962 |
hwaddr offset, |
963 |
uint64_t size) |
964 |
{ |
965 |
memory_region_init(mr, name, size); |
966 |
mr->alias = orig; |
967 |
mr->alias_offset = offset; |
968 |
} |
969 |
|
970 |
void memory_region_init_rom_device(MemoryRegion *mr,
|
971 |
const MemoryRegionOps *ops,
|
972 |
void *opaque,
|
973 |
const char *name, |
974 |
uint64_t size) |
975 |
{ |
976 |
memory_region_init(mr, name, size); |
977 |
mr->ops = ops; |
978 |
mr->opaque = opaque; |
979 |
mr->terminates = true;
|
980 |
mr->rom_device = true;
|
981 |
mr->destructor = memory_region_destructor_rom_device; |
982 |
mr->ram_addr = qemu_ram_alloc(size, mr); |
983 |
} |
984 |
|
985 |
static uint64_t invalid_read(void *opaque, hwaddr addr, |
986 |
unsigned size)
|
987 |
{ |
988 |
MemoryRegion *mr = opaque; |
989 |
|
990 |
if (!mr->warning_printed) {
|
991 |
fprintf(stderr, "Invalid read from memory region %s\n", mr->name);
|
992 |
mr->warning_printed = true;
|
993 |
} |
994 |
return -1U; |
995 |
} |
996 |
|
997 |
static void invalid_write(void *opaque, hwaddr addr, uint64_t data, |
998 |
unsigned size)
|
999 |
{ |
1000 |
MemoryRegion *mr = opaque; |
1001 |
|
1002 |
if (!mr->warning_printed) {
|
1003 |
fprintf(stderr, "Invalid write to memory region %s\n", mr->name);
|
1004 |
mr->warning_printed = true;
|
1005 |
} |
1006 |
} |
1007 |
|
1008 |
static const MemoryRegionOps reservation_ops = { |
1009 |
.read = invalid_read, |
1010 |
.write = invalid_write, |
1011 |
.endianness = DEVICE_NATIVE_ENDIAN, |
1012 |
}; |
1013 |
|
1014 |
void memory_region_init_reservation(MemoryRegion *mr,
|
1015 |
const char *name, |
1016 |
uint64_t size) |
1017 |
{ |
1018 |
memory_region_init_io(mr, &reservation_ops, mr, name, size); |
1019 |
} |
1020 |
|
1021 |
void memory_region_destroy(MemoryRegion *mr)
|
1022 |
{ |
1023 |
assert(QTAILQ_EMPTY(&mr->subregions)); |
1024 |
assert(memory_region_transaction_depth == 0);
|
1025 |
mr->destructor(mr); |
1026 |
memory_region_clear_coalescing(mr); |
1027 |
g_free((char *)mr->name);
|
1028 |
g_free(mr->ioeventfds); |
1029 |
} |
1030 |
|
1031 |
uint64_t memory_region_size(MemoryRegion *mr) |
1032 |
{ |
1033 |
if (int128_eq(mr->size, int128_2_64())) {
|
1034 |
return UINT64_MAX;
|
1035 |
} |
1036 |
return int128_get64(mr->size);
|
1037 |
} |
1038 |
|
1039 |
const char *memory_region_name(MemoryRegion *mr) |
1040 |
{ |
1041 |
return mr->name;
|
1042 |
} |
1043 |
|
1044 |
bool memory_region_is_ram(MemoryRegion *mr)
|
1045 |
{ |
1046 |
return mr->ram;
|
1047 |
} |
1048 |
|
1049 |
bool memory_region_is_logging(MemoryRegion *mr)
|
1050 |
{ |
1051 |
return mr->dirty_log_mask;
|
1052 |
} |
1053 |
|
1054 |
bool memory_region_is_rom(MemoryRegion *mr)
|
1055 |
{ |
1056 |
return mr->ram && mr->readonly;
|
1057 |
} |
1058 |
|
1059 |
void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client) |
1060 |
{ |
1061 |
uint8_t mask = 1 << client;
|
1062 |
|
1063 |
memory_region_transaction_begin(); |
1064 |
mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask); |
1065 |
memory_region_update_pending |= mr->enabled; |
1066 |
memory_region_transaction_commit(); |
1067 |
} |
1068 |
|
1069 |
bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr,
|
1070 |
hwaddr size, unsigned client)
|
1071 |
{ |
1072 |
assert(mr->terminates); |
1073 |
return cpu_physical_memory_get_dirty(mr->ram_addr + addr, size,
|
1074 |
1 << client);
|
1075 |
} |
1076 |
|
1077 |
void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
|
1078 |
hwaddr size) |
1079 |
{ |
1080 |
assert(mr->terminates); |
1081 |
return cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size, -1); |
1082 |
} |
1083 |
|
1084 |
bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
|
1085 |
hwaddr size, unsigned client)
|
1086 |
{ |
1087 |
bool ret;
|
1088 |
assert(mr->terminates); |
1089 |
ret = cpu_physical_memory_get_dirty(mr->ram_addr + addr, size, |
1090 |
1 << client);
|
1091 |
if (ret) {
|
1092 |
cpu_physical_memory_reset_dirty(mr->ram_addr + addr, |
1093 |
mr->ram_addr + addr + size, |
1094 |
1 << client);
|
1095 |
} |
1096 |
return ret;
|
1097 |
} |
1098 |
|
1099 |
|
1100 |
void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
|
1101 |
{ |
1102 |
AddressSpace *as; |
1103 |
FlatRange *fr; |
1104 |
|
1105 |
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
1106 |
FOR_EACH_FLAT_RANGE(fr, as->current_map) { |
1107 |
if (fr->mr == mr) {
|
1108 |
MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync); |
1109 |
} |
1110 |
} |
1111 |
} |
1112 |
} |
1113 |
|
1114 |
void memory_region_set_readonly(MemoryRegion *mr, bool readonly) |
1115 |
{ |
1116 |
if (mr->readonly != readonly) {
|
1117 |
memory_region_transaction_begin(); |
1118 |
mr->readonly = readonly; |
1119 |
memory_region_update_pending |= mr->enabled; |
1120 |
memory_region_transaction_commit(); |
1121 |
} |
1122 |
} |
1123 |
|
1124 |
void memory_region_rom_device_set_readable(MemoryRegion *mr, bool readable) |
1125 |
{ |
1126 |
if (mr->readable != readable) {
|
1127 |
memory_region_transaction_begin(); |
1128 |
mr->readable = readable; |
1129 |
memory_region_update_pending |= mr->enabled; |
1130 |
memory_region_transaction_commit(); |
1131 |
} |
1132 |
} |
1133 |
|
1134 |
void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
|
1135 |
hwaddr size, unsigned client)
|
1136 |
{ |
1137 |
assert(mr->terminates); |
1138 |
cpu_physical_memory_reset_dirty(mr->ram_addr + addr, |
1139 |
mr->ram_addr + addr + size, |
1140 |
1 << client);
|
1141 |
} |
1142 |
|
1143 |
void *memory_region_get_ram_ptr(MemoryRegion *mr)
|
1144 |
{ |
1145 |
if (mr->alias) {
|
1146 |
return memory_region_get_ram_ptr(mr->alias) + mr->alias_offset;
|
1147 |
} |
1148 |
|
1149 |
assert(mr->terminates); |
1150 |
|
1151 |
return qemu_get_ram_ptr(mr->ram_addr & TARGET_PAGE_MASK);
|
1152 |
} |
1153 |
|
1154 |
static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as) |
1155 |
{ |
1156 |
FlatRange *fr; |
1157 |
CoalescedMemoryRange *cmr; |
1158 |
AddrRange tmp; |
1159 |
MemoryRegionSection section; |
1160 |
|
1161 |
FOR_EACH_FLAT_RANGE(fr, as->current_map) { |
1162 |
if (fr->mr == mr) {
|
1163 |
section = (MemoryRegionSection) { |
1164 |
.address_space = as, |
1165 |
.offset_within_address_space = int128_get64(fr->addr.start), |
1166 |
.size = int128_get64(fr->addr.size), |
1167 |
}; |
1168 |
|
1169 |
MEMORY_LISTENER_CALL(coalesced_mmio_del, Reverse, §ion, |
1170 |
int128_get64(fr->addr.start), |
1171 |
int128_get64(fr->addr.size)); |
1172 |
QTAILQ_FOREACH(cmr, &mr->coalesced, link) { |
1173 |
tmp = addrrange_shift(cmr->addr, |
1174 |
int128_sub(fr->addr.start, |
1175 |
int128_make64(fr->offset_in_region))); |
1176 |
if (!addrrange_intersects(tmp, fr->addr)) {
|
1177 |
continue;
|
1178 |
} |
1179 |
tmp = addrrange_intersection(tmp, fr->addr); |
1180 |
MEMORY_LISTENER_CALL(coalesced_mmio_add, Forward, §ion, |
1181 |
int128_get64(tmp.start), |
1182 |
int128_get64(tmp.size)); |
1183 |
} |
1184 |
} |
1185 |
} |
1186 |
} |
1187 |
|
1188 |
static void memory_region_update_coalesced_range(MemoryRegion *mr) |
1189 |
{ |
1190 |
AddressSpace *as; |
1191 |
|
1192 |
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
1193 |
memory_region_update_coalesced_range_as(mr, as); |
1194 |
} |
1195 |
} |
1196 |
|
1197 |
void memory_region_set_coalescing(MemoryRegion *mr)
|
1198 |
{ |
1199 |
memory_region_clear_coalescing(mr); |
1200 |
memory_region_add_coalescing(mr, 0, int128_get64(mr->size));
|
1201 |
} |
1202 |
|
1203 |
void memory_region_add_coalescing(MemoryRegion *mr,
|
1204 |
hwaddr offset, |
1205 |
uint64_t size) |
1206 |
{ |
1207 |
CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
|
1208 |
|
1209 |
cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size)); |
1210 |
QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link); |
1211 |
memory_region_update_coalesced_range(mr); |
1212 |
memory_region_set_flush_coalesced(mr); |
1213 |
} |
1214 |
|
1215 |
void memory_region_clear_coalescing(MemoryRegion *mr)
|
1216 |
{ |
1217 |
CoalescedMemoryRange *cmr; |
1218 |
|
1219 |
qemu_flush_coalesced_mmio_buffer(); |
1220 |
mr->flush_coalesced_mmio = false;
|
1221 |
|
1222 |
while (!QTAILQ_EMPTY(&mr->coalesced)) {
|
1223 |
cmr = QTAILQ_FIRST(&mr->coalesced); |
1224 |
QTAILQ_REMOVE(&mr->coalesced, cmr, link); |
1225 |
g_free(cmr); |
1226 |
} |
1227 |
memory_region_update_coalesced_range(mr); |
1228 |
} |
1229 |
|
1230 |
void memory_region_set_flush_coalesced(MemoryRegion *mr)
|
1231 |
{ |
1232 |
mr->flush_coalesced_mmio = true;
|
1233 |
} |
1234 |
|
1235 |
void memory_region_clear_flush_coalesced(MemoryRegion *mr)
|
1236 |
{ |
1237 |
qemu_flush_coalesced_mmio_buffer(); |
1238 |
if (QTAILQ_EMPTY(&mr->coalesced)) {
|
1239 |
mr->flush_coalesced_mmio = false;
|
1240 |
} |
1241 |
} |
1242 |
|
1243 |
void memory_region_add_eventfd(MemoryRegion *mr,
|
1244 |
hwaddr addr, |
1245 |
unsigned size,
|
1246 |
bool match_data,
|
1247 |
uint64_t data, |
1248 |
EventNotifier *e) |
1249 |
{ |
1250 |
MemoryRegionIoeventfd mrfd = { |
1251 |
.addr.start = int128_make64(addr), |
1252 |
.addr.size = int128_make64(size), |
1253 |
.match_data = match_data, |
1254 |
.data = data, |
1255 |
.e = e, |
1256 |
}; |
1257 |
unsigned i;
|
1258 |
|
1259 |
adjust_endianness(mr, &mrfd.data, size); |
1260 |
memory_region_transaction_begin(); |
1261 |
for (i = 0; i < mr->ioeventfd_nb; ++i) { |
1262 |
if (memory_region_ioeventfd_before(mrfd, mr->ioeventfds[i])) {
|
1263 |
break;
|
1264 |
} |
1265 |
} |
1266 |
++mr->ioeventfd_nb; |
1267 |
mr->ioeventfds = g_realloc(mr->ioeventfds, |
1268 |
sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
|
1269 |
memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
|
1270 |
sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i)); |
1271 |
mr->ioeventfds[i] = mrfd; |
1272 |
memory_region_update_pending |= mr->enabled; |
1273 |
memory_region_transaction_commit(); |
1274 |
} |
1275 |
|
1276 |
void memory_region_del_eventfd(MemoryRegion *mr,
|
1277 |
hwaddr addr, |
1278 |
unsigned size,
|
1279 |
bool match_data,
|
1280 |
uint64_t data, |
1281 |
EventNotifier *e) |
1282 |
{ |
1283 |
MemoryRegionIoeventfd mrfd = { |
1284 |
.addr.start = int128_make64(addr), |
1285 |
.addr.size = int128_make64(size), |
1286 |
.match_data = match_data, |
1287 |
.data = data, |
1288 |
.e = e, |
1289 |
}; |
1290 |
unsigned i;
|
1291 |
|
1292 |
adjust_endianness(mr, &mrfd.data, size); |
1293 |
memory_region_transaction_begin(); |
1294 |
for (i = 0; i < mr->ioeventfd_nb; ++i) { |
1295 |
if (memory_region_ioeventfd_equal(mrfd, mr->ioeventfds[i])) {
|
1296 |
break;
|
1297 |
} |
1298 |
} |
1299 |
assert(i != mr->ioeventfd_nb); |
1300 |
memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
|
1301 |
sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1))); |
1302 |
--mr->ioeventfd_nb; |
1303 |
mr->ioeventfds = g_realloc(mr->ioeventfds, |
1304 |
sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1); |
1305 |
memory_region_update_pending |= mr->enabled; |
1306 |
memory_region_transaction_commit(); |
1307 |
} |
1308 |
|
1309 |
static void memory_region_add_subregion_common(MemoryRegion *mr, |
1310 |
hwaddr offset, |
1311 |
MemoryRegion *subregion) |
1312 |
{ |
1313 |
MemoryRegion *other; |
1314 |
|
1315 |
memory_region_transaction_begin(); |
1316 |
|
1317 |
assert(!subregion->parent); |
1318 |
subregion->parent = mr; |
1319 |
subregion->addr = offset; |
1320 |
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { |
1321 |
if (subregion->may_overlap || other->may_overlap) {
|
1322 |
continue;
|
1323 |
} |
1324 |
if (int128_gt(int128_make64(offset),
|
1325 |
int128_add(int128_make64(other->addr), other->size)) |
1326 |
|| int128_le(int128_add(int128_make64(offset), subregion->size), |
1327 |
int128_make64(other->addr))) { |
1328 |
continue;
|
1329 |
} |
1330 |
#if 0
|
1331 |
printf("warning: subregion collision %llx/%llx (%s) "
|
1332 |
"vs %llx/%llx (%s)\n",
|
1333 |
(unsigned long long)offset,
|
1334 |
(unsigned long long)int128_get64(subregion->size),
|
1335 |
subregion->name,
|
1336 |
(unsigned long long)other->addr,
|
1337 |
(unsigned long long)int128_get64(other->size),
|
1338 |
other->name);
|
1339 |
#endif
|
1340 |
} |
1341 |
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { |
1342 |
if (subregion->priority >= other->priority) {
|
1343 |
QTAILQ_INSERT_BEFORE(other, subregion, subregions_link); |
1344 |
goto done;
|
1345 |
} |
1346 |
} |
1347 |
QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link); |
1348 |
done:
|
1349 |
memory_region_update_pending |= mr->enabled && subregion->enabled; |
1350 |
memory_region_transaction_commit(); |
1351 |
} |
1352 |
|
1353 |
|
1354 |
void memory_region_add_subregion(MemoryRegion *mr,
|
1355 |
hwaddr offset, |
1356 |
MemoryRegion *subregion) |
1357 |
{ |
1358 |
subregion->may_overlap = false;
|
1359 |
subregion->priority = 0;
|
1360 |
memory_region_add_subregion_common(mr, offset, subregion); |
1361 |
} |
1362 |
|
1363 |
void memory_region_add_subregion_overlap(MemoryRegion *mr,
|
1364 |
hwaddr offset, |
1365 |
MemoryRegion *subregion, |
1366 |
unsigned priority)
|
1367 |
{ |
1368 |
subregion->may_overlap = true;
|
1369 |
subregion->priority = priority; |
1370 |
memory_region_add_subregion_common(mr, offset, subregion); |
1371 |
} |
1372 |
|
1373 |
void memory_region_del_subregion(MemoryRegion *mr,
|
1374 |
MemoryRegion *subregion) |
1375 |
{ |
1376 |
memory_region_transaction_begin(); |
1377 |
assert(subregion->parent == mr); |
1378 |
subregion->parent = NULL;
|
1379 |
QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link); |
1380 |
memory_region_update_pending |= mr->enabled && subregion->enabled; |
1381 |
memory_region_transaction_commit(); |
1382 |
} |
1383 |
|
1384 |
void memory_region_set_enabled(MemoryRegion *mr, bool enabled) |
1385 |
{ |
1386 |
if (enabled == mr->enabled) {
|
1387 |
return;
|
1388 |
} |
1389 |
memory_region_transaction_begin(); |
1390 |
mr->enabled = enabled; |
1391 |
memory_region_update_pending = true;
|
1392 |
memory_region_transaction_commit(); |
1393 |
} |
1394 |
|
1395 |
void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
|
1396 |
{ |
1397 |
MemoryRegion *parent = mr->parent; |
1398 |
unsigned priority = mr->priority;
|
1399 |
bool may_overlap = mr->may_overlap;
|
1400 |
|
1401 |
if (addr == mr->addr || !parent) {
|
1402 |
mr->addr = addr; |
1403 |
return;
|
1404 |
} |
1405 |
|
1406 |
memory_region_transaction_begin(); |
1407 |
memory_region_del_subregion(parent, mr); |
1408 |
if (may_overlap) {
|
1409 |
memory_region_add_subregion_overlap(parent, addr, mr, priority); |
1410 |
} else {
|
1411 |
memory_region_add_subregion(parent, addr, mr); |
1412 |
} |
1413 |
memory_region_transaction_commit(); |
1414 |
} |
1415 |
|
1416 |
void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
|
1417 |
{ |
1418 |
assert(mr->alias); |
1419 |
|
1420 |
if (offset == mr->alias_offset) {
|
1421 |
return;
|
1422 |
} |
1423 |
|
1424 |
memory_region_transaction_begin(); |
1425 |
mr->alias_offset = offset; |
1426 |
memory_region_update_pending |= mr->enabled; |
1427 |
memory_region_transaction_commit(); |
1428 |
} |
1429 |
|
1430 |
ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr) |
1431 |
{ |
1432 |
return mr->ram_addr;
|
1433 |
} |
1434 |
|
1435 |
static int cmp_flatrange_addr(const void *addr_, const void *fr_) |
1436 |
{ |
1437 |
const AddrRange *addr = addr_;
|
1438 |
const FlatRange *fr = fr_;
|
1439 |
|
1440 |
if (int128_le(addrrange_end(*addr), fr->addr.start)) {
|
1441 |
return -1; |
1442 |
} else if (int128_ge(addr->start, addrrange_end(fr->addr))) { |
1443 |
return 1; |
1444 |
} |
1445 |
return 0; |
1446 |
} |
1447 |
|
1448 |
static FlatRange *address_space_lookup(AddressSpace *as, AddrRange addr)
|
1449 |
{ |
1450 |
return bsearch(&addr, as->current_map->ranges, as->current_map->nr,
|
1451 |
sizeof(FlatRange), cmp_flatrange_addr);
|
1452 |
} |
1453 |
|
1454 |
MemoryRegionSection memory_region_find(MemoryRegion *address_space, |
1455 |
hwaddr addr, uint64_t size) |
1456 |
{ |
1457 |
AddressSpace *as = memory_region_to_address_space(address_space); |
1458 |
AddrRange range = addrrange_make(int128_make64(addr), |
1459 |
int128_make64(size)); |
1460 |
FlatRange *fr = address_space_lookup(as, range); |
1461 |
MemoryRegionSection ret = { .mr = NULL, .size = 0 }; |
1462 |
|
1463 |
if (!fr) {
|
1464 |
return ret;
|
1465 |
} |
1466 |
|
1467 |
while (fr > as->current_map->ranges
|
1468 |
&& addrrange_intersects(fr[-1].addr, range)) {
|
1469 |
--fr; |
1470 |
} |
1471 |
|
1472 |
ret.mr = fr->mr; |
1473 |
range = addrrange_intersection(range, fr->addr); |
1474 |
ret.offset_within_region = fr->offset_in_region; |
1475 |
ret.offset_within_region += int128_get64(int128_sub(range.start, |
1476 |
fr->addr.start)); |
1477 |
ret.size = int128_get64(range.size); |
1478 |
ret.offset_within_address_space = int128_get64(range.start); |
1479 |
ret.readonly = fr->readonly; |
1480 |
return ret;
|
1481 |
} |
1482 |
|
1483 |
void memory_global_sync_dirty_bitmap(MemoryRegion *address_space)
|
1484 |
{ |
1485 |
AddressSpace *as = memory_region_to_address_space(address_space); |
1486 |
FlatRange *fr; |
1487 |
|
1488 |
FOR_EACH_FLAT_RANGE(fr, as->current_map) { |
1489 |
MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync); |
1490 |
} |
1491 |
} |
1492 |
|
1493 |
void memory_global_dirty_log_start(void) |
1494 |
{ |
1495 |
global_dirty_log = true;
|
1496 |
MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward); |
1497 |
} |
1498 |
|
1499 |
void memory_global_dirty_log_stop(void) |
1500 |
{ |
1501 |
global_dirty_log = false;
|
1502 |
MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse); |
1503 |
} |
1504 |
|
1505 |
static void listener_add_address_space(MemoryListener *listener, |
1506 |
AddressSpace *as) |
1507 |
{ |
1508 |
FlatRange *fr; |
1509 |
|
1510 |
if (listener->address_space_filter
|
1511 |
&& listener->address_space_filter != as) { |
1512 |
return;
|
1513 |
} |
1514 |
|
1515 |
if (global_dirty_log) {
|
1516 |
if (listener->log_global_start) {
|
1517 |
listener->log_global_start(listener); |
1518 |
} |
1519 |
} |
1520 |
|
1521 |
FOR_EACH_FLAT_RANGE(fr, as->current_map) { |
1522 |
MemoryRegionSection section = { |
1523 |
.mr = fr->mr, |
1524 |
.address_space = as, |
1525 |
.offset_within_region = fr->offset_in_region, |
1526 |
.size = int128_get64(fr->addr.size), |
1527 |
.offset_within_address_space = int128_get64(fr->addr.start), |
1528 |
.readonly = fr->readonly, |
1529 |
}; |
1530 |
if (listener->region_add) {
|
1531 |
listener->region_add(listener, §ion); |
1532 |
} |
1533 |
} |
1534 |
} |
1535 |
|
1536 |
void memory_listener_register(MemoryListener *listener, AddressSpace *filter)
|
1537 |
{ |
1538 |
MemoryListener *other = NULL;
|
1539 |
AddressSpace *as; |
1540 |
|
1541 |
listener->address_space_filter = filter; |
1542 |
if (QTAILQ_EMPTY(&memory_listeners)
|
1543 |
|| listener->priority >= QTAILQ_LAST(&memory_listeners, |
1544 |
memory_listeners)->priority) { |
1545 |
QTAILQ_INSERT_TAIL(&memory_listeners, listener, link); |
1546 |
} else {
|
1547 |
QTAILQ_FOREACH(other, &memory_listeners, link) { |
1548 |
if (listener->priority < other->priority) {
|
1549 |
break;
|
1550 |
} |
1551 |
} |
1552 |
QTAILQ_INSERT_BEFORE(other, listener, link); |
1553 |
} |
1554 |
|
1555 |
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
1556 |
listener_add_address_space(listener, as); |
1557 |
} |
1558 |
} |
1559 |
|
1560 |
void memory_listener_unregister(MemoryListener *listener)
|
1561 |
{ |
1562 |
QTAILQ_REMOVE(&memory_listeners, listener, link); |
1563 |
} |
1564 |
|
1565 |
void address_space_init(AddressSpace *as, MemoryRegion *root)
|
1566 |
{ |
1567 |
memory_region_transaction_begin(); |
1568 |
as->root = root; |
1569 |
as->current_map = g_new(FlatView, 1);
|
1570 |
flatview_init(as->current_map); |
1571 |
QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link); |
1572 |
as->name = NULL;
|
1573 |
memory_region_transaction_commit(); |
1574 |
address_space_init_dispatch(as); |
1575 |
} |
1576 |
|
1577 |
void address_space_destroy(AddressSpace *as)
|
1578 |
{ |
1579 |
/* Flush out anything from MemoryListeners listening in on this */
|
1580 |
memory_region_transaction_begin(); |
1581 |
as->root = NULL;
|
1582 |
memory_region_transaction_commit(); |
1583 |
QTAILQ_REMOVE(&address_spaces, as, address_spaces_link); |
1584 |
address_space_destroy_dispatch(as); |
1585 |
flatview_destroy(as->current_map); |
1586 |
g_free(as->current_map); |
1587 |
} |
1588 |
|
1589 |
uint64_t io_mem_read(MemoryRegion *mr, hwaddr addr, unsigned size)
|
1590 |
{ |
1591 |
return memory_region_dispatch_read(mr, addr, size);
|
1592 |
} |
1593 |
|
1594 |
void io_mem_write(MemoryRegion *mr, hwaddr addr,
|
1595 |
uint64_t val, unsigned size)
|
1596 |
{ |
1597 |
memory_region_dispatch_write(mr, addr, val, size); |
1598 |
} |
1599 |
|
1600 |
typedef struct MemoryRegionList MemoryRegionList; |
1601 |
|
1602 |
struct MemoryRegionList {
|
1603 |
const MemoryRegion *mr;
|
1604 |
bool printed;
|
1605 |
QTAILQ_ENTRY(MemoryRegionList) queue; |
1606 |
}; |
1607 |
|
1608 |
typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead;
|
1609 |
|
1610 |
static void mtree_print_mr(fprintf_function mon_printf, void *f, |
1611 |
const MemoryRegion *mr, unsigned int level, |
1612 |
hwaddr base, |
1613 |
MemoryRegionListHead *alias_print_queue) |
1614 |
{ |
1615 |
MemoryRegionList *new_ml, *ml, *next_ml; |
1616 |
MemoryRegionListHead submr_print_queue; |
1617 |
const MemoryRegion *submr;
|
1618 |
unsigned int i; |
1619 |
|
1620 |
if (!mr || !mr->enabled) {
|
1621 |
return;
|
1622 |
} |
1623 |
|
1624 |
for (i = 0; i < level; i++) { |
1625 |
mon_printf(f, " ");
|
1626 |
} |
1627 |
|
1628 |
if (mr->alias) {
|
1629 |
MemoryRegionList *ml; |
1630 |
bool found = false; |
1631 |
|
1632 |
/* check if the alias is already in the queue */
|
1633 |
QTAILQ_FOREACH(ml, alias_print_queue, queue) { |
1634 |
if (ml->mr == mr->alias && !ml->printed) {
|
1635 |
found = true;
|
1636 |
} |
1637 |
} |
1638 |
|
1639 |
if (!found) {
|
1640 |
ml = g_new(MemoryRegionList, 1);
|
1641 |
ml->mr = mr->alias; |
1642 |
ml->printed = false;
|
1643 |
QTAILQ_INSERT_TAIL(alias_print_queue, ml, queue); |
1644 |
} |
1645 |
mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx
|
1646 |
" (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
|
1647 |
"-" TARGET_FMT_plx "\n", |
1648 |
base + mr->addr, |
1649 |
base + mr->addr |
1650 |
+ (hwaddr)int128_get64(mr->size) - 1,
|
1651 |
mr->priority, |
1652 |
mr->readable ? 'R' : '-', |
1653 |
!mr->readonly && !(mr->rom_device && mr->readable) ? 'W'
|
1654 |
: '-',
|
1655 |
mr->name, |
1656 |
mr->alias->name, |
1657 |
mr->alias_offset, |
1658 |
mr->alias_offset |
1659 |
+ (hwaddr)int128_get64(mr->size) - 1);
|
1660 |
} else {
|
1661 |
mon_printf(f, |
1662 |
TARGET_FMT_plx "-" TARGET_FMT_plx " (prio %d, %c%c): %s\n", |
1663 |
base + mr->addr, |
1664 |
base + mr->addr |
1665 |
+ (hwaddr)int128_get64(mr->size) - 1,
|
1666 |
mr->priority, |
1667 |
mr->readable ? 'R' : '-', |
1668 |
!mr->readonly && !(mr->rom_device && mr->readable) ? 'W'
|
1669 |
: '-',
|
1670 |
mr->name); |
1671 |
} |
1672 |
|
1673 |
QTAILQ_INIT(&submr_print_queue); |
1674 |
|
1675 |
QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) { |
1676 |
new_ml = g_new(MemoryRegionList, 1);
|
1677 |
new_ml->mr = submr; |
1678 |
QTAILQ_FOREACH(ml, &submr_print_queue, queue) { |
1679 |
if (new_ml->mr->addr < ml->mr->addr ||
|
1680 |
(new_ml->mr->addr == ml->mr->addr && |
1681 |
new_ml->mr->priority > ml->mr->priority)) { |
1682 |
QTAILQ_INSERT_BEFORE(ml, new_ml, queue); |
1683 |
new_ml = NULL;
|
1684 |
break;
|
1685 |
} |
1686 |
} |
1687 |
if (new_ml) {
|
1688 |
QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, queue); |
1689 |
} |
1690 |
} |
1691 |
|
1692 |
QTAILQ_FOREACH(ml, &submr_print_queue, queue) { |
1693 |
mtree_print_mr(mon_printf, f, ml->mr, level + 1, base + mr->addr,
|
1694 |
alias_print_queue); |
1695 |
} |
1696 |
|
1697 |
QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, queue, next_ml) { |
1698 |
g_free(ml); |
1699 |
} |
1700 |
} |
1701 |
|
1702 |
void mtree_info(fprintf_function mon_printf, void *f) |
1703 |
{ |
1704 |
MemoryRegionListHead ml_head; |
1705 |
MemoryRegionList *ml, *ml2; |
1706 |
AddressSpace *as; |
1707 |
|
1708 |
QTAILQ_INIT(&ml_head); |
1709 |
|
1710 |
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { |
1711 |
if (!as->name) {
|
1712 |
continue;
|
1713 |
} |
1714 |
mon_printf(f, "%s\n", as->name);
|
1715 |
mtree_print_mr(mon_printf, f, as->root, 0, 0, &ml_head); |
1716 |
} |
1717 |
|
1718 |
mon_printf(f, "aliases\n");
|
1719 |
/* print aliased regions */
|
1720 |
QTAILQ_FOREACH(ml, &ml_head, queue) { |
1721 |
if (!ml->printed) {
|
1722 |
mon_printf(f, "%s\n", ml->mr->name);
|
1723 |
mtree_print_mr(mon_printf, f, ml->mr, 0, 0, &ml_head); |
1724 |
} |
1725 |
} |
1726 |
|
1727 |
QTAILQ_FOREACH_SAFE(ml, &ml_head, queue, ml2) { |
1728 |
g_free(ml); |
1729 |
} |
1730 |
} |