1869 lines
57 KiB
C
1869 lines
57 KiB
C
/*
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* Physical memory management
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*
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* Copyright 2011 Red Hat, Inc. and/or its affiliates
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*
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* Authors:
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* Avi Kivity <avi@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "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 "qom/object.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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//#define DEBUG_UNASSIGNED
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static unsigned memory_region_transaction_depth;
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static bool memory_region_update_pending;
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static bool global_dirty_log = false;
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/* flat_view_mutex is taken around reading as->current_map; the critical
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* section is extremely short, so I'm using a single mutex for every AS.
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* We could also RCU for the read-side.
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*
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* The BQL is taken around transaction commits, hence both locks are taken
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* while writing to as->current_map (with the BQL taken outside).
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*/
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static QemuMutex flat_view_mutex;
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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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static void memory_init(void)
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{
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qemu_mutex_init(&flat_view_mutex);
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}
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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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/* No need to ref/unref .mr, the FlatRange keeps it alive. */
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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 = (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 romd_mode;
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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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unsigned ref;
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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->romd_mode == b->romd_mode
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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->ref = 1;
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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;
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memory_region_ref(range->mr);
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++view->nr;
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}
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static void flatview_destroy(FlatView *view)
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{
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int i;
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for (i = 0; i < view->nr; i++) {
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memory_region_unref(view->ranges[i].mr);
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}
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g_free(view->ranges);
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g_free(view);
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}
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static void flatview_ref(FlatView *view)
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{
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atomic_inc(&view->ref);
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}
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static void flatview_unref(FlatView *view)
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{
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if (atomic_fetch_dec(&view->ref) == 1) {
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flatview_destroy(view);
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}
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}
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static bool can_merge(FlatRange *r1, FlatRange *r2)
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{
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return int128_eq(addrrange_end(r1->addr), r2->addr.start)
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&& r1->mr == r2->mr
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&& int128_eq(int128_add(int128_make64(r1->offset_in_region),
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r1->addr.size),
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int128_make64(r2->offset_in_region))
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&& r1->dirty_log_mask == r2->dirty_log_mask
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&& r1->romd_mode == r2->romd_mode
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&& r1->readonly == r2->readonly;
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}
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/* Attempt to simplify a view by merging adjacent ranges */
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static void flatview_simplify(FlatView *view)
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{
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unsigned i, j;
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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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static void memory_region_oldmmio_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;
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uint64_t tmp;
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tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr);
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*value |= (tmp & mask) << shift;
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}
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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;
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uint64_t tmp;
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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;
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}
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static void memory_region_oldmmio_write_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;
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uint64_t tmp;
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tmp = (*value >> shift) & mask;
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mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp);
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}
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static void memory_region_write_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;
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uint64_t tmp;
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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 = (*value >> shift) & mask;
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mr->ops->write(mr->opaque, addr, tmp, size);
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}
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static void access_with_adjusted_size(hwaddr addr,
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uint64_t *value,
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unsigned size,
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unsigned access_size_min,
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unsigned access_size_max,
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void (*access)(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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void *opaque)
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{
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uint64_t access_mask;
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unsigned access_size;
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unsigned i;
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if (!access_size_min) {
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access_size_min = 1;
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}
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if (!access_size_max) {
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access_size_max = 4;
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}
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/* FIXME: support unaligned access? */
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access_size = MAX(MIN(size, access_size_max), access_size_min);
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access_mask = -1ULL >> (64 - access_size * 8);
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for (i = 0; i < size; i += access_size) {
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#ifdef TARGET_WORDS_BIGENDIAN
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access(opaque, addr + i, value, access_size,
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(size - access_size - i) * 8, access_mask);
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#else
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access(opaque, addr + i, value, access_size, i * 8, access_mask);
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#endif
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}
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}
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static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
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{
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AddressSpace *as;
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while (mr->parent) {
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mr = mr->parent;
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}
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QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
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if (mr == as->root) {
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return as;
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}
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}
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abort();
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}
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|
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/* Render a memory region into the global view. Ranges in @view obscure
|
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* ranges in @mr.
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*/
|
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static void render_memory_region(FlatView *view,
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MemoryRegion *mr,
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Int128 base,
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AddrRange clip,
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bool readonly)
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{
|
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MemoryRegion *subregion;
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unsigned i;
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hwaddr offset_in_region;
|
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Int128 remain;
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Int128 now;
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FlatRange fr;
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AddrRange tmp;
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|
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if (!mr->enabled) {
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return;
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}
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|
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int128_addto(&base, int128_make64(mr->addr));
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readonly |= mr->readonly;
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|
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tmp = addrrange_make(base, mr->size);
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|
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if (!addrrange_intersects(tmp, clip)) {
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return;
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}
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|
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clip = addrrange_intersection(tmp, clip);
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|
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if (mr->alias) {
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int128_subfrom(&base, int128_make64(mr->alias->addr));
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int128_subfrom(&base, int128_make64(mr->alias_offset));
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render_memory_region(view, mr->alias, base, clip, readonly);
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return;
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}
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|
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/* Render subregions in priority order. */
|
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QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
|
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render_memory_region(view, subregion, base, clip, readonly);
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}
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|
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if (!mr->terminates) {
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return;
|
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}
|
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|
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offset_in_region = int128_get64(int128_sub(clip.start, base));
|
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base = clip.start;
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remain = clip.size;
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|
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fr.mr = mr;
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fr.dirty_log_mask = mr->dirty_log_mask;
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fr.romd_mode = mr->romd_mode;
|
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fr.readonly = readonly;
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|
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/* Render the region itself into any gaps left by the current view. */
|
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for (i = 0; i < view->nr && int128_nz(remain); ++i) {
|
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if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
|
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continue;
|
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}
|
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if (int128_lt(base, view->ranges[i].addr.start)) {
|
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now = int128_min(remain,
|
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int128_sub(view->ranges[i].addr.start, base));
|
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fr.offset_in_region = offset_in_region;
|
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fr.addr = addrrange_make(base, now);
|
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flatview_insert(view, i, &fr);
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++i;
|
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int128_addto(&base, now);
|
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offset_in_region += int128_get64(now);
|
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int128_subfrom(&remain, now);
|
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}
|
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now = int128_sub(int128_min(int128_add(base, remain),
|
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addrrange_end(view->ranges[i].addr)),
|
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base);
|
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int128_addto(&base, now);
|
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offset_in_region += int128_get64(now);
|
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int128_subfrom(&remain, now);
|
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}
|
|
if (int128_nz(remain)) {
|
|
fr.offset_in_region = offset_in_region;
|
|
fr.addr = addrrange_make(base, remain);
|
|
flatview_insert(view, i, &fr);
|
|
}
|
|
}
|
|
|
|
/* Render a memory topology into a list of disjoint absolute ranges. */
|
|
static FlatView *generate_memory_topology(MemoryRegion *mr)
|
|
{
|
|
FlatView *view;
|
|
|
|
view = g_new(FlatView, 1);
|
|
flatview_init(view);
|
|
|
|
if (mr) {
|
|
render_memory_region(view, mr, int128_zero(),
|
|
addrrange_make(int128_zero(), int128_2_64()), false);
|
|
}
|
|
flatview_simplify(view);
|
|
|
|
return view;
|
|
}
|
|
|
|
static void address_space_add_del_ioeventfds(AddressSpace *as,
|
|
MemoryRegionIoeventfd *fds_new,
|
|
unsigned fds_new_nb,
|
|
MemoryRegionIoeventfd *fds_old,
|
|
unsigned fds_old_nb)
|
|
{
|
|
unsigned iold, inew;
|
|
MemoryRegionIoeventfd *fd;
|
|
MemoryRegionSection section;
|
|
|
|
/* Generate a symmetric difference of the old and new fd sets, adding
|
|
* and deleting as necessary.
|
|
*/
|
|
|
|
iold = inew = 0;
|
|
while (iold < fds_old_nb || inew < fds_new_nb) {
|
|
if (iold < fds_old_nb
|
|
&& (inew == fds_new_nb
|
|
|| memory_region_ioeventfd_before(fds_old[iold],
|
|
fds_new[inew]))) {
|
|
fd = &fds_old[iold];
|
|
section = (MemoryRegionSection) {
|
|
.address_space = as,
|
|
.offset_within_address_space = int128_get64(fd->addr.start),
|
|
.size = fd->addr.size,
|
|
};
|
|
MEMORY_LISTENER_CALL(eventfd_del, Forward, §ion,
|
|
fd->match_data, fd->data, fd->e);
|
|
++iold;
|
|
} else if (inew < fds_new_nb
|
|
&& (iold == fds_old_nb
|
|
|| memory_region_ioeventfd_before(fds_new[inew],
|
|
fds_old[iold]))) {
|
|
fd = &fds_new[inew];
|
|
section = (MemoryRegionSection) {
|
|
.address_space = as,
|
|
.offset_within_address_space = int128_get64(fd->addr.start),
|
|
.size = fd->addr.size,
|
|
};
|
|
MEMORY_LISTENER_CALL(eventfd_add, Reverse, §ion,
|
|
fd->match_data, fd->data, fd->e);
|
|
++inew;
|
|
} else {
|
|
++iold;
|
|
++inew;
|
|
}
|
|
}
|
|
}
|
|
|
|
static FlatView *address_space_get_flatview(AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
|
|
qemu_mutex_lock(&flat_view_mutex);
|
|
view = as->current_map;
|
|
flatview_ref(view);
|
|
qemu_mutex_unlock(&flat_view_mutex);
|
|
return view;
|
|
}
|
|
|
|
static void address_space_update_ioeventfds(AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
unsigned ioeventfd_nb = 0;
|
|
MemoryRegionIoeventfd *ioeventfds = NULL;
|
|
AddrRange tmp;
|
|
unsigned i;
|
|
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
for (i = 0; i < fr->mr->ioeventfd_nb; ++i) {
|
|
tmp = addrrange_shift(fr->mr->ioeventfds[i].addr,
|
|
int128_sub(fr->addr.start,
|
|
int128_make64(fr->offset_in_region)));
|
|
if (addrrange_intersects(fr->addr, tmp)) {
|
|
++ioeventfd_nb;
|
|
ioeventfds = g_realloc(ioeventfds,
|
|
ioeventfd_nb * sizeof(*ioeventfds));
|
|
ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
|
|
ioeventfds[ioeventfd_nb-1].addr = tmp;
|
|
}
|
|
}
|
|
}
|
|
|
|
address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb,
|
|
as->ioeventfds, as->ioeventfd_nb);
|
|
|
|
g_free(as->ioeventfds);
|
|
as->ioeventfds = ioeventfds;
|
|
as->ioeventfd_nb = ioeventfd_nb;
|
|
flatview_unref(view);
|
|
}
|
|
|
|
static void address_space_update_topology_pass(AddressSpace *as,
|
|
const FlatView *old_view,
|
|
const FlatView *new_view,
|
|
bool adding)
|
|
{
|
|
unsigned iold, inew;
|
|
FlatRange *frold, *frnew;
|
|
|
|
/* Generate a symmetric difference of the old and new memory maps.
|
|
* Kill ranges in the old map, and instantiate ranges in the new map.
|
|
*/
|
|
iold = inew = 0;
|
|
while (iold < old_view->nr || inew < new_view->nr) {
|
|
if (iold < old_view->nr) {
|
|
frold = &old_view->ranges[iold];
|
|
} else {
|
|
frold = NULL;
|
|
}
|
|
if (inew < new_view->nr) {
|
|
frnew = &new_view->ranges[inew];
|
|
} else {
|
|
frnew = NULL;
|
|
}
|
|
|
|
if (frold
|
|
&& (!frnew
|
|
|| int128_lt(frold->addr.start, frnew->addr.start)
|
|
|| (int128_eq(frold->addr.start, frnew->addr.start)
|
|
&& !flatrange_equal(frold, frnew)))) {
|
|
/* In old but not in new, or in both but attributes changed. */
|
|
|
|
if (!adding) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del);
|
|
}
|
|
|
|
++iold;
|
|
} else if (frold && frnew && flatrange_equal(frold, frnew)) {
|
|
/* In both and unchanged (except logging may have changed) */
|
|
|
|
if (adding) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop);
|
|
if (frold->dirty_log_mask && !frnew->dirty_log_mask) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop);
|
|
} else if (frnew->dirty_log_mask && !frold->dirty_log_mask) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start);
|
|
}
|
|
}
|
|
|
|
++iold;
|
|
++inew;
|
|
} else {
|
|
/* In new */
|
|
|
|
if (adding) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add);
|
|
}
|
|
|
|
++inew;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void address_space_update_topology(AddressSpace *as)
|
|
{
|
|
FlatView *old_view = address_space_get_flatview(as);
|
|
FlatView *new_view = generate_memory_topology(as->root);
|
|
|
|
address_space_update_topology_pass(as, old_view, new_view, false);
|
|
address_space_update_topology_pass(as, old_view, new_view, true);
|
|
|
|
qemu_mutex_lock(&flat_view_mutex);
|
|
flatview_unref(as->current_map);
|
|
as->current_map = new_view;
|
|
qemu_mutex_unlock(&flat_view_mutex);
|
|
|
|
/* Note that all the old MemoryRegions are still alive up to this
|
|
* point. This relieves most MemoryListeners from the need to
|
|
* ref/unref the MemoryRegions they get---unless they use them
|
|
* outside the iothread mutex, in which case precise reference
|
|
* counting is necessary.
|
|
*/
|
|
flatview_unref(old_view);
|
|
|
|
address_space_update_ioeventfds(as);
|
|
}
|
|
|
|
void memory_region_transaction_begin(void)
|
|
{
|
|
qemu_flush_coalesced_mmio_buffer();
|
|
++memory_region_transaction_depth;
|
|
}
|
|
|
|
void memory_region_transaction_commit(void)
|
|
{
|
|
AddressSpace *as;
|
|
|
|
assert(memory_region_transaction_depth);
|
|
--memory_region_transaction_depth;
|
|
if (!memory_region_transaction_depth && memory_region_update_pending) {
|
|
memory_region_update_pending = false;
|
|
MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
address_space_update_topology(as);
|
|
}
|
|
|
|
MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
|
|
}
|
|
}
|
|
|
|
static void memory_region_destructor_none(MemoryRegion *mr)
|
|
{
|
|
}
|
|
|
|
static void memory_region_destructor_ram(MemoryRegion *mr)
|
|
{
|
|
qemu_ram_free(mr->ram_addr);
|
|
}
|
|
|
|
static void memory_region_destructor_alias(MemoryRegion *mr)
|
|
{
|
|
memory_region_unref(mr->alias);
|
|
}
|
|
|
|
static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr)
|
|
{
|
|
qemu_ram_free_from_ptr(mr->ram_addr);
|
|
}
|
|
|
|
static void memory_region_destructor_rom_device(MemoryRegion *mr)
|
|
{
|
|
qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK);
|
|
}
|
|
|
|
static bool memory_region_wrong_endianness(MemoryRegion *mr)
|
|
{
|
|
#ifdef TARGET_WORDS_BIGENDIAN
|
|
return mr->ops->endianness == DEVICE_LITTLE_ENDIAN;
|
|
#else
|
|
return mr->ops->endianness == DEVICE_BIG_ENDIAN;
|
|
#endif
|
|
}
|
|
|
|
void memory_region_init(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
mr->ops = &unassigned_mem_ops;
|
|
mr->opaque = NULL;
|
|
mr->owner = owner;
|
|
mr->iommu_ops = NULL;
|
|
mr->parent = NULL;
|
|
mr->owner = NULL;
|
|
mr->size = int128_make64(size);
|
|
if (size == UINT64_MAX) {
|
|
mr->size = int128_2_64();
|
|
}
|
|
mr->addr = 0;
|
|
mr->subpage = false;
|
|
mr->enabled = true;
|
|
mr->terminates = false;
|
|
mr->ram = false;
|
|
mr->romd_mode = true;
|
|
mr->readonly = false;
|
|
mr->rom_device = false;
|
|
mr->destructor = memory_region_destructor_none;
|
|
mr->priority = 0;
|
|
mr->may_overlap = false;
|
|
mr->alias = NULL;
|
|
QTAILQ_INIT(&mr->subregions);
|
|
memset(&mr->subregions_link, 0, sizeof mr->subregions_link);
|
|
QTAILQ_INIT(&mr->coalesced);
|
|
mr->name = g_strdup(name);
|
|
mr->dirty_log_mask = 0;
|
|
mr->ioeventfd_nb = 0;
|
|
mr->ioeventfds = NULL;
|
|
mr->flush_coalesced_mmio = false;
|
|
}
|
|
|
|
static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
|
|
unsigned size)
|
|
{
|
|
#ifdef DEBUG_UNASSIGNED
|
|
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
|
|
#endif
|
|
if (current_cpu != NULL) {
|
|
cpu_unassigned_access(current_cpu, addr, false, false, 0, size);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void unassigned_mem_write(void *opaque, hwaddr addr,
|
|
uint64_t val, unsigned size)
|
|
{
|
|
#ifdef DEBUG_UNASSIGNED
|
|
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val);
|
|
#endif
|
|
if (current_cpu != NULL) {
|
|
cpu_unassigned_access(current_cpu, addr, true, false, 0, size);
|
|
}
|
|
}
|
|
|
|
static bool unassigned_mem_accepts(void *opaque, hwaddr addr,
|
|
unsigned size, bool is_write)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
const MemoryRegionOps unassigned_mem_ops = {
|
|
.valid.accepts = unassigned_mem_accepts,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
};
|
|
|
|
bool memory_region_access_valid(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size,
|
|
bool is_write)
|
|
{
|
|
int access_size_min, access_size_max;
|
|
int access_size, i;
|
|
|
|
if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
|
|
return false;
|
|
}
|
|
|
|
if (!mr->ops->valid.accepts) {
|
|
return true;
|
|
}
|
|
|
|
access_size_min = mr->ops->valid.min_access_size;
|
|
if (!mr->ops->valid.min_access_size) {
|
|
access_size_min = 1;
|
|
}
|
|
|
|
access_size_max = mr->ops->valid.max_access_size;
|
|
if (!mr->ops->valid.max_access_size) {
|
|
access_size_max = 4;
|
|
}
|
|
|
|
access_size = MAX(MIN(size, access_size_max), access_size_min);
|
|
for (i = 0; i < size; i += access_size) {
|
|
if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size,
|
|
is_write)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static uint64_t memory_region_dispatch_read1(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size)
|
|
{
|
|
uint64_t data = 0;
|
|
|
|
if (mr->ops->read) {
|
|
access_with_adjusted_size(addr, &data, size,
|
|
mr->ops->impl.min_access_size,
|
|
mr->ops->impl.max_access_size,
|
|
memory_region_read_accessor, mr);
|
|
} else {
|
|
access_with_adjusted_size(addr, &data, size, 1, 4,
|
|
memory_region_oldmmio_read_accessor, mr);
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
|
|
{
|
|
if (memory_region_wrong_endianness(mr)) {
|
|
switch (size) {
|
|
case 1:
|
|
break;
|
|
case 2:
|
|
*data = bswap16(*data);
|
|
break;
|
|
case 4:
|
|
*data = bswap32(*data);
|
|
break;
|
|
case 8:
|
|
*data = bswap64(*data);
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool memory_region_dispatch_read(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *pval,
|
|
unsigned size)
|
|
{
|
|
if (!memory_region_access_valid(mr, addr, size, false)) {
|
|
*pval = unassigned_mem_read(mr, addr, size);
|
|
return true;
|
|
}
|
|
|
|
*pval = memory_region_dispatch_read1(mr, addr, size);
|
|
adjust_endianness(mr, pval, size);
|
|
return false;
|
|
}
|
|
|
|
static bool memory_region_dispatch_write(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t data,
|
|
unsigned size)
|
|
{
|
|
if (!memory_region_access_valid(mr, addr, size, true)) {
|
|
unassigned_mem_write(mr, addr, data, size);
|
|
return true;
|
|
}
|
|
|
|
adjust_endianness(mr, &data, size);
|
|
|
|
if (mr->ops->write) {
|
|
access_with_adjusted_size(addr, &data, size,
|
|
mr->ops->impl.min_access_size,
|
|
mr->ops->impl.max_access_size,
|
|
memory_region_write_accessor, mr);
|
|
} else {
|
|
access_with_adjusted_size(addr, &data, size, 1, 4,
|
|
memory_region_oldmmio_write_accessor, mr);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void memory_region_init_io(MemoryRegion *mr,
|
|
Object *owner,
|
|
const MemoryRegionOps *ops,
|
|
void *opaque,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ops = ops;
|
|
mr->opaque = opaque;
|
|
mr->terminates = true;
|
|
mr->ram_addr = ~(ram_addr_t)0;
|
|
}
|
|
|
|
void memory_region_init_ram(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->ram_addr = qemu_ram_alloc(size, mr);
|
|
}
|
|
|
|
void memory_region_init_ram_ptr(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
void *ptr)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram_from_ptr;
|
|
mr->ram_addr = qemu_ram_alloc_from_ptr(size, ptr, mr);
|
|
}
|
|
|
|
void memory_region_init_alias(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
MemoryRegion *orig,
|
|
hwaddr offset,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
memory_region_ref(orig);
|
|
mr->destructor = memory_region_destructor_alias;
|
|
mr->alias = orig;
|
|
mr->alias_offset = offset;
|
|
}
|
|
|
|
void memory_region_init_rom_device(MemoryRegion *mr,
|
|
Object *owner,
|
|
const MemoryRegionOps *ops,
|
|
void *opaque,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ops = ops;
|
|
mr->opaque = opaque;
|
|
mr->terminates = true;
|
|
mr->rom_device = true;
|
|
mr->destructor = memory_region_destructor_rom_device;
|
|
mr->ram_addr = qemu_ram_alloc(size, mr);
|
|
}
|
|
|
|
void memory_region_init_iommu(MemoryRegion *mr,
|
|
Object *owner,
|
|
const MemoryRegionIOMMUOps *ops,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->iommu_ops = ops,
|
|
mr->terminates = true; /* then re-forwards */
|
|
notifier_list_init(&mr->iommu_notify);
|
|
}
|
|
|
|
void memory_region_init_reservation(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init_io(mr, owner, &unassigned_mem_ops, mr, name, size);
|
|
}
|
|
|
|
void memory_region_destroy(MemoryRegion *mr)
|
|
{
|
|
assert(QTAILQ_EMPTY(&mr->subregions));
|
|
assert(memory_region_transaction_depth == 0);
|
|
mr->destructor(mr);
|
|
memory_region_clear_coalescing(mr);
|
|
g_free((char *)mr->name);
|
|
g_free(mr->ioeventfds);
|
|
}
|
|
|
|
Object *memory_region_owner(MemoryRegion *mr)
|
|
{
|
|
return mr->owner;
|
|
}
|
|
|
|
void memory_region_ref(MemoryRegion *mr)
|
|
{
|
|
if (mr && mr->owner) {
|
|
object_ref(mr->owner);
|
|
}
|
|
}
|
|
|
|
void memory_region_unref(MemoryRegion *mr)
|
|
{
|
|
if (mr && mr->owner) {
|
|
object_unref(mr->owner);
|
|
}
|
|
}
|
|
|
|
uint64_t memory_region_size(MemoryRegion *mr)
|
|
{
|
|
if (int128_eq(mr->size, int128_2_64())) {
|
|
return UINT64_MAX;
|
|
}
|
|
return int128_get64(mr->size);
|
|
}
|
|
|
|
const char *memory_region_name(MemoryRegion *mr)
|
|
{
|
|
return mr->name;
|
|
}
|
|
|
|
bool memory_region_is_ram(MemoryRegion *mr)
|
|
{
|
|
return mr->ram;
|
|
}
|
|
|
|
bool memory_region_is_logging(MemoryRegion *mr)
|
|
{
|
|
return mr->dirty_log_mask;
|
|
}
|
|
|
|
bool memory_region_is_rom(MemoryRegion *mr)
|
|
{
|
|
return mr->ram && mr->readonly;
|
|
}
|
|
|
|
bool memory_region_is_iommu(MemoryRegion *mr)
|
|
{
|
|
return mr->iommu_ops;
|
|
}
|
|
|
|
void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n)
|
|
{
|
|
notifier_list_add(&mr->iommu_notify, n);
|
|
}
|
|
|
|
void memory_region_unregister_iommu_notifier(Notifier *n)
|
|
{
|
|
notifier_remove(n);
|
|
}
|
|
|
|
void memory_region_notify_iommu(MemoryRegion *mr,
|
|
IOMMUTLBEntry entry)
|
|
{
|
|
assert(memory_region_is_iommu(mr));
|
|
notifier_list_notify(&mr->iommu_notify, &entry);
|
|
}
|
|
|
|
void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
|
|
{
|
|
uint8_t mask = 1 << client;
|
|
|
|
memory_region_transaction_begin();
|
|
mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask);
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size, unsigned client)
|
|
{
|
|
assert(mr->terminates);
|
|
return cpu_physical_memory_get_dirty(mr->ram_addr + addr, size,
|
|
1 << client);
|
|
}
|
|
|
|
void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size)
|
|
{
|
|
assert(mr->terminates);
|
|
return cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size, -1);
|
|
}
|
|
|
|
bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size, unsigned client)
|
|
{
|
|
bool ret;
|
|
assert(mr->terminates);
|
|
ret = cpu_physical_memory_get_dirty(mr->ram_addr + addr, size,
|
|
1 << client);
|
|
if (ret) {
|
|
cpu_physical_memory_reset_dirty(mr->ram_addr + addr,
|
|
mr->ram_addr + addr + size,
|
|
1 << client);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
|
|
{
|
|
AddressSpace *as;
|
|
FlatRange *fr;
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
FlatView *view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
if (fr->mr == mr) {
|
|
MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
|
|
}
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
}
|
|
|
|
void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
|
|
{
|
|
if (mr->readonly != readonly) {
|
|
memory_region_transaction_begin();
|
|
mr->readonly = readonly;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
}
|
|
|
|
void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode)
|
|
{
|
|
if (mr->romd_mode != romd_mode) {
|
|
memory_region_transaction_begin();
|
|
mr->romd_mode = romd_mode;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
}
|
|
|
|
void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size, unsigned client)
|
|
{
|
|
assert(mr->terminates);
|
|
cpu_physical_memory_reset_dirty(mr->ram_addr + addr,
|
|
mr->ram_addr + addr + size,
|
|
1 << client);
|
|
}
|
|
|
|
void *memory_region_get_ram_ptr(MemoryRegion *mr)
|
|
{
|
|
if (mr->alias) {
|
|
return memory_region_get_ram_ptr(mr->alias) + mr->alias_offset;
|
|
}
|
|
|
|
assert(mr->terminates);
|
|
|
|
return qemu_get_ram_ptr(mr->ram_addr & TARGET_PAGE_MASK);
|
|
}
|
|
|
|
static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
CoalescedMemoryRange *cmr;
|
|
AddrRange tmp;
|
|
MemoryRegionSection section;
|
|
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
if (fr->mr == mr) {
|
|
section = (MemoryRegionSection) {
|
|
.address_space = as,
|
|
.offset_within_address_space = int128_get64(fr->addr.start),
|
|
.size = fr->addr.size,
|
|
};
|
|
|
|
MEMORY_LISTENER_CALL(coalesced_mmio_del, Reverse, §ion,
|
|
int128_get64(fr->addr.start),
|
|
int128_get64(fr->addr.size));
|
|
QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
|
|
tmp = addrrange_shift(cmr->addr,
|
|
int128_sub(fr->addr.start,
|
|
int128_make64(fr->offset_in_region)));
|
|
if (!addrrange_intersects(tmp, fr->addr)) {
|
|
continue;
|
|
}
|
|
tmp = addrrange_intersection(tmp, fr->addr);
|
|
MEMORY_LISTENER_CALL(coalesced_mmio_add, Forward, §ion,
|
|
int128_get64(tmp.start),
|
|
int128_get64(tmp.size));
|
|
}
|
|
}
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
|
|
static void memory_region_update_coalesced_range(MemoryRegion *mr)
|
|
{
|
|
AddressSpace *as;
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
memory_region_update_coalesced_range_as(mr, as);
|
|
}
|
|
}
|
|
|
|
void memory_region_set_coalescing(MemoryRegion *mr)
|
|
{
|
|
memory_region_clear_coalescing(mr);
|
|
memory_region_add_coalescing(mr, 0, int128_get64(mr->size));
|
|
}
|
|
|
|
void memory_region_add_coalescing(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
uint64_t size)
|
|
{
|
|
CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
|
|
|
|
cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size));
|
|
QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link);
|
|
memory_region_update_coalesced_range(mr);
|
|
memory_region_set_flush_coalesced(mr);
|
|
}
|
|
|
|
void memory_region_clear_coalescing(MemoryRegion *mr)
|
|
{
|
|
CoalescedMemoryRange *cmr;
|
|
|
|
qemu_flush_coalesced_mmio_buffer();
|
|
mr->flush_coalesced_mmio = false;
|
|
|
|
while (!QTAILQ_EMPTY(&mr->coalesced)) {
|
|
cmr = QTAILQ_FIRST(&mr->coalesced);
|
|
QTAILQ_REMOVE(&mr->coalesced, cmr, link);
|
|
g_free(cmr);
|
|
}
|
|
memory_region_update_coalesced_range(mr);
|
|
}
|
|
|
|
void memory_region_set_flush_coalesced(MemoryRegion *mr)
|
|
{
|
|
mr->flush_coalesced_mmio = true;
|
|
}
|
|
|
|
void memory_region_clear_flush_coalesced(MemoryRegion *mr)
|
|
{
|
|
qemu_flush_coalesced_mmio_buffer();
|
|
if (QTAILQ_EMPTY(&mr->coalesced)) {
|
|
mr->flush_coalesced_mmio = false;
|
|
}
|
|
}
|
|
|
|
void memory_region_add_eventfd(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size,
|
|
bool match_data,
|
|
uint64_t data,
|
|
EventNotifier *e)
|
|
{
|
|
MemoryRegionIoeventfd mrfd = {
|
|
.addr.start = int128_make64(addr),
|
|
.addr.size = int128_make64(size),
|
|
.match_data = match_data,
|
|
.data = data,
|
|
.e = e,
|
|
};
|
|
unsigned i;
|
|
|
|
adjust_endianness(mr, &mrfd.data, size);
|
|
memory_region_transaction_begin();
|
|
for (i = 0; i < mr->ioeventfd_nb; ++i) {
|
|
if (memory_region_ioeventfd_before(mrfd, mr->ioeventfds[i])) {
|
|
break;
|
|
}
|
|
}
|
|
++mr->ioeventfd_nb;
|
|
mr->ioeventfds = g_realloc(mr->ioeventfds,
|
|
sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
|
|
memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
|
|
sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
|
|
mr->ioeventfds[i] = mrfd;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_del_eventfd(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size,
|
|
bool match_data,
|
|
uint64_t data,
|
|
EventNotifier *e)
|
|
{
|
|
MemoryRegionIoeventfd mrfd = {
|
|
.addr.start = int128_make64(addr),
|
|
.addr.size = int128_make64(size),
|
|
.match_data = match_data,
|
|
.data = data,
|
|
.e = e,
|
|
};
|
|
unsigned i;
|
|
|
|
adjust_endianness(mr, &mrfd.data, size);
|
|
memory_region_transaction_begin();
|
|
for (i = 0; i < mr->ioeventfd_nb; ++i) {
|
|
if (memory_region_ioeventfd_equal(mrfd, mr->ioeventfds[i])) {
|
|
break;
|
|
}
|
|
}
|
|
assert(i != mr->ioeventfd_nb);
|
|
memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
|
|
sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1)));
|
|
--mr->ioeventfd_nb;
|
|
mr->ioeventfds = g_realloc(mr->ioeventfds,
|
|
sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1);
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
static void memory_region_add_subregion_common(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion)
|
|
{
|
|
MemoryRegion *other;
|
|
|
|
memory_region_transaction_begin();
|
|
|
|
assert(!subregion->parent);
|
|
memory_region_ref(subregion);
|
|
subregion->parent = mr;
|
|
subregion->addr = offset;
|
|
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
|
|
if (subregion->may_overlap || other->may_overlap) {
|
|
continue;
|
|
}
|
|
if (int128_ge(int128_make64(offset),
|
|
int128_add(int128_make64(other->addr), other->size))
|
|
|| int128_le(int128_add(int128_make64(offset), subregion->size),
|
|
int128_make64(other->addr))) {
|
|
continue;
|
|
}
|
|
#if 0
|
|
printf("warning: subregion collision %llx/%llx (%s) "
|
|
"vs %llx/%llx (%s)\n",
|
|
(unsigned long long)offset,
|
|
(unsigned long long)int128_get64(subregion->size),
|
|
subregion->name,
|
|
(unsigned long long)other->addr,
|
|
(unsigned long long)int128_get64(other->size),
|
|
other->name);
|
|
#endif
|
|
}
|
|
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
|
|
if (subregion->priority >= other->priority) {
|
|
QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
|
|
goto done;
|
|
}
|
|
}
|
|
QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
|
|
done:
|
|
memory_region_update_pending |= mr->enabled && subregion->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
|
|
void memory_region_add_subregion(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion)
|
|
{
|
|
subregion->may_overlap = false;
|
|
subregion->priority = 0;
|
|
memory_region_add_subregion_common(mr, offset, subregion);
|
|
}
|
|
|
|
void memory_region_add_subregion_overlap(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion,
|
|
unsigned priority)
|
|
{
|
|
subregion->may_overlap = true;
|
|
subregion->priority = priority;
|
|
memory_region_add_subregion_common(mr, offset, subregion);
|
|
}
|
|
|
|
void memory_region_del_subregion(MemoryRegion *mr,
|
|
MemoryRegion *subregion)
|
|
{
|
|
memory_region_transaction_begin();
|
|
assert(subregion->parent == mr);
|
|
subregion->parent = NULL;
|
|
QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
|
|
memory_region_unref(subregion);
|
|
memory_region_update_pending |= mr->enabled && subregion->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
|
|
{
|
|
if (enabled == mr->enabled) {
|
|
return;
|
|
}
|
|
memory_region_transaction_begin();
|
|
mr->enabled = enabled;
|
|
memory_region_update_pending = true;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
|
|
{
|
|
MemoryRegion *parent = mr->parent;
|
|
unsigned priority = mr->priority;
|
|
bool may_overlap = mr->may_overlap;
|
|
|
|
if (addr == mr->addr || !parent) {
|
|
mr->addr = addr;
|
|
return;
|
|
}
|
|
|
|
memory_region_transaction_begin();
|
|
memory_region_ref(mr);
|
|
memory_region_del_subregion(parent, mr);
|
|
if (may_overlap) {
|
|
memory_region_add_subregion_overlap(parent, addr, mr, priority);
|
|
} else {
|
|
memory_region_add_subregion(parent, addr, mr);
|
|
}
|
|
memory_region_unref(mr);
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
|
|
{
|
|
assert(mr->alias);
|
|
|
|
if (offset == mr->alias_offset) {
|
|
return;
|
|
}
|
|
|
|
memory_region_transaction_begin();
|
|
mr->alias_offset = offset;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr)
|
|
{
|
|
return mr->ram_addr;
|
|
}
|
|
|
|
static int cmp_flatrange_addr(const void *addr_, const void *fr_)
|
|
{
|
|
const AddrRange *addr = addr_;
|
|
const FlatRange *fr = fr_;
|
|
|
|
if (int128_le(addrrange_end(*addr), fr->addr.start)) {
|
|
return -1;
|
|
} else if (int128_ge(addr->start, addrrange_end(fr->addr))) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static FlatRange *flatview_lookup(FlatView *view, AddrRange addr)
|
|
{
|
|
return bsearch(&addr, view->ranges, view->nr,
|
|
sizeof(FlatRange), cmp_flatrange_addr);
|
|
}
|
|
|
|
bool memory_region_present(MemoryRegion *parent, hwaddr addr)
|
|
{
|
|
MemoryRegion *mr = memory_region_find(parent, addr, 1).mr;
|
|
if (!mr) {
|
|
return false;
|
|
}
|
|
memory_region_unref(mr);
|
|
return true;
|
|
}
|
|
|
|
MemoryRegionSection memory_region_find(MemoryRegion *mr,
|
|
hwaddr addr, uint64_t size)
|
|
{
|
|
MemoryRegionSection ret = { .mr = NULL };
|
|
MemoryRegion *root;
|
|
AddressSpace *as;
|
|
AddrRange range;
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
addr += mr->addr;
|
|
for (root = mr; root->parent; ) {
|
|
root = root->parent;
|
|
addr += root->addr;
|
|
}
|
|
|
|
as = memory_region_to_address_space(root);
|
|
range = addrrange_make(int128_make64(addr), int128_make64(size));
|
|
|
|
view = address_space_get_flatview(as);
|
|
fr = flatview_lookup(view, range);
|
|
if (!fr) {
|
|
return ret;
|
|
}
|
|
|
|
while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
|
|
--fr;
|
|
}
|
|
|
|
ret.mr = fr->mr;
|
|
ret.address_space = as;
|
|
range = addrrange_intersection(range, fr->addr);
|
|
ret.offset_within_region = fr->offset_in_region;
|
|
ret.offset_within_region += int128_get64(int128_sub(range.start,
|
|
fr->addr.start));
|
|
ret.size = range.size;
|
|
ret.offset_within_address_space = int128_get64(range.start);
|
|
ret.readonly = fr->readonly;
|
|
memory_region_ref(ret.mr);
|
|
|
|
flatview_unref(view);
|
|
return ret;
|
|
}
|
|
|
|
void address_space_sync_dirty_bitmap(AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
|
|
void memory_global_dirty_log_start(void)
|
|
{
|
|
global_dirty_log = true;
|
|
MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward);
|
|
}
|
|
|
|
void memory_global_dirty_log_stop(void)
|
|
{
|
|
global_dirty_log = false;
|
|
MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse);
|
|
}
|
|
|
|
static void listener_add_address_space(MemoryListener *listener,
|
|
AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
if (listener->address_space_filter
|
|
&& listener->address_space_filter != as) {
|
|
return;
|
|
}
|
|
|
|
if (global_dirty_log) {
|
|
if (listener->log_global_start) {
|
|
listener->log_global_start(listener);
|
|
}
|
|
}
|
|
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
MemoryRegionSection section = {
|
|
.mr = fr->mr,
|
|
.address_space = as,
|
|
.offset_within_region = fr->offset_in_region,
|
|
.size = fr->addr.size,
|
|
.offset_within_address_space = int128_get64(fr->addr.start),
|
|
.readonly = fr->readonly,
|
|
};
|
|
if (listener->region_add) {
|
|
listener->region_add(listener, §ion);
|
|
}
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
|
|
void memory_listener_register(MemoryListener *listener, AddressSpace *filter)
|
|
{
|
|
MemoryListener *other = NULL;
|
|
AddressSpace *as;
|
|
|
|
listener->address_space_filter = filter;
|
|
if (QTAILQ_EMPTY(&memory_listeners)
|
|
|| listener->priority >= QTAILQ_LAST(&memory_listeners,
|
|
memory_listeners)->priority) {
|
|
QTAILQ_INSERT_TAIL(&memory_listeners, listener, link);
|
|
} else {
|
|
QTAILQ_FOREACH(other, &memory_listeners, link) {
|
|
if (listener->priority < other->priority) {
|
|
break;
|
|
}
|
|
}
|
|
QTAILQ_INSERT_BEFORE(other, listener, link);
|
|
}
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
listener_add_address_space(listener, as);
|
|
}
|
|
}
|
|
|
|
void memory_listener_unregister(MemoryListener *listener)
|
|
{
|
|
QTAILQ_REMOVE(&memory_listeners, listener, link);
|
|
}
|
|
|
|
void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name)
|
|
{
|
|
if (QTAILQ_EMPTY(&address_spaces)) {
|
|
memory_init();
|
|
}
|
|
|
|
memory_region_transaction_begin();
|
|
as->root = root;
|
|
as->current_map = g_new(FlatView, 1);
|
|
flatview_init(as->current_map);
|
|
as->ioeventfd_nb = 0;
|
|
as->ioeventfds = NULL;
|
|
QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link);
|
|
as->name = g_strdup(name ? name : "anonymous");
|
|
address_space_init_dispatch(as);
|
|
memory_region_update_pending |= root->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void address_space_destroy(AddressSpace *as)
|
|
{
|
|
/* Flush out anything from MemoryListeners listening in on this */
|
|
memory_region_transaction_begin();
|
|
as->root = NULL;
|
|
memory_region_transaction_commit();
|
|
QTAILQ_REMOVE(&address_spaces, as, address_spaces_link);
|
|
address_space_destroy_dispatch(as);
|
|
flatview_unref(as->current_map);
|
|
g_free(as->name);
|
|
g_free(as->ioeventfds);
|
|
}
|
|
|
|
bool io_mem_read(MemoryRegion *mr, hwaddr addr, uint64_t *pval, unsigned size)
|
|
{
|
|
return memory_region_dispatch_read(mr, addr, pval, size);
|
|
}
|
|
|
|
bool io_mem_write(MemoryRegion *mr, hwaddr addr,
|
|
uint64_t val, unsigned size)
|
|
{
|
|
return memory_region_dispatch_write(mr, addr, val, size);
|
|
}
|
|
|
|
typedef struct MemoryRegionList MemoryRegionList;
|
|
|
|
struct MemoryRegionList {
|
|
const MemoryRegion *mr;
|
|
bool printed;
|
|
QTAILQ_ENTRY(MemoryRegionList) queue;
|
|
};
|
|
|
|
typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead;
|
|
|
|
static void mtree_print_mr(fprintf_function mon_printf, void *f,
|
|
const MemoryRegion *mr, unsigned int level,
|
|
hwaddr base,
|
|
MemoryRegionListHead *alias_print_queue)
|
|
{
|
|
MemoryRegionList *new_ml, *ml, *next_ml;
|
|
MemoryRegionListHead submr_print_queue;
|
|
const MemoryRegion *submr;
|
|
unsigned int i;
|
|
|
|
if (!mr || !mr->enabled) {
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < level; i++) {
|
|
mon_printf(f, " ");
|
|
}
|
|
|
|
if (mr->alias) {
|
|
MemoryRegionList *ml;
|
|
bool found = false;
|
|
|
|
/* check if the alias is already in the queue */
|
|
QTAILQ_FOREACH(ml, alias_print_queue, queue) {
|
|
if (ml->mr == mr->alias && !ml->printed) {
|
|
found = true;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
ml = g_new(MemoryRegionList, 1);
|
|
ml->mr = mr->alias;
|
|
ml->printed = false;
|
|
QTAILQ_INSERT_TAIL(alias_print_queue, ml, queue);
|
|
}
|
|
mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx
|
|
" (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
|
|
"-" TARGET_FMT_plx "\n",
|
|
base + mr->addr,
|
|
base + mr->addr
|
|
+ (hwaddr)int128_get64(int128_sub(mr->size, int128_make64(1))),
|
|
mr->priority,
|
|
mr->romd_mode ? 'R' : '-',
|
|
!mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W'
|
|
: '-',
|
|
mr->name,
|
|
mr->alias->name,
|
|
mr->alias_offset,
|
|
mr->alias_offset
|
|
+ (hwaddr)int128_get64(mr->size) - 1);
|
|
} else {
|
|
mon_printf(f,
|
|
TARGET_FMT_plx "-" TARGET_FMT_plx " (prio %d, %c%c): %s\n",
|
|
base + mr->addr,
|
|
base + mr->addr
|
|
+ (hwaddr)int128_get64(int128_sub(mr->size, int128_make64(1))),
|
|
mr->priority,
|
|
mr->romd_mode ? 'R' : '-',
|
|
!mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W'
|
|
: '-',
|
|
mr->name);
|
|
}
|
|
|
|
QTAILQ_INIT(&submr_print_queue);
|
|
|
|
QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) {
|
|
new_ml = g_new(MemoryRegionList, 1);
|
|
new_ml->mr = submr;
|
|
QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
|
|
if (new_ml->mr->addr < ml->mr->addr ||
|
|
(new_ml->mr->addr == ml->mr->addr &&
|
|
new_ml->mr->priority > ml->mr->priority)) {
|
|
QTAILQ_INSERT_BEFORE(ml, new_ml, queue);
|
|
new_ml = NULL;
|
|
break;
|
|
}
|
|
}
|
|
if (new_ml) {
|
|
QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, queue);
|
|
}
|
|
}
|
|
|
|
QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
|
|
mtree_print_mr(mon_printf, f, ml->mr, level + 1, base + mr->addr,
|
|
alias_print_queue);
|
|
}
|
|
|
|
QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, queue, next_ml) {
|
|
g_free(ml);
|
|
}
|
|
}
|
|
|
|
void mtree_info(fprintf_function mon_printf, void *f)
|
|
{
|
|
MemoryRegionListHead ml_head;
|
|
MemoryRegionList *ml, *ml2;
|
|
AddressSpace *as;
|
|
|
|
QTAILQ_INIT(&ml_head);
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
mon_printf(f, "%s\n", as->name);
|
|
mtree_print_mr(mon_printf, f, as->root, 0, 0, &ml_head);
|
|
}
|
|
|
|
mon_printf(f, "aliases\n");
|
|
/* print aliased regions */
|
|
QTAILQ_FOREACH(ml, &ml_head, queue) {
|
|
if (!ml->printed) {
|
|
mon_printf(f, "%s\n", ml->mr->name);
|
|
mtree_print_mr(mon_printf, f, ml->mr, 0, 0, &ml_head);
|
|
}
|
|
}
|
|
|
|
QTAILQ_FOREACH_SAFE(ml, &ml_head, queue, ml2) {
|
|
g_free(ml);
|
|
}
|
|
}
|