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