2322 lines
73 KiB
C
2322 lines
73 KiB
C
/*
|
|
* Physical memory management
|
|
*
|
|
* Copyright 2011 Red Hat, Inc. and/or its affiliates
|
|
*
|
|
* Authors:
|
|
* Avi Kivity <avi@redhat.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
|
*/
|
|
|
|
#include "exec/memory.h"
|
|
#include "exec/address-spaces.h"
|
|
#include "exec/ioport.h"
|
|
#include "qapi/visitor.h"
|
|
#include "qemu/bitops.h"
|
|
#include "qemu/error-report.h"
|
|
#include "qom/object.h"
|
|
#include "trace.h"
|
|
#include <assert.h>
|
|
|
|
#include "exec/memory-internal.h"
|
|
#include "exec/ram_addr.h"
|
|
#include "sysemu/kvm.h"
|
|
#include "sysemu/sysemu.h"
|
|
|
|
//#define DEBUG_UNASSIGNED
|
|
|
|
#define RAM_ADDR_INVALID (~(ram_addr_t)0)
|
|
|
|
static unsigned memory_region_transaction_depth;
|
|
static bool memory_region_update_pending;
|
|
static bool ioeventfd_update_pending;
|
|
static bool global_dirty_log = false;
|
|
|
|
static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners
|
|
= QTAILQ_HEAD_INITIALIZER(memory_listeners);
|
|
|
|
static QTAILQ_HEAD(, AddressSpace) address_spaces
|
|
= QTAILQ_HEAD_INITIALIZER(address_spaces);
|
|
|
|
typedef struct AddrRange AddrRange;
|
|
|
|
/*
|
|
* Note that signed integers are needed for negative offsetting in aliases
|
|
* (large MemoryRegion::alias_offset).
|
|
*/
|
|
struct AddrRange {
|
|
Int128 start;
|
|
Int128 size;
|
|
};
|
|
|
|
static AddrRange addrrange_make(Int128 start, Int128 size)
|
|
{
|
|
return (AddrRange) { start, size };
|
|
}
|
|
|
|
static bool addrrange_equal(AddrRange r1, AddrRange r2)
|
|
{
|
|
return int128_eq(r1.start, r2.start) && int128_eq(r1.size, r2.size);
|
|
}
|
|
|
|
static Int128 addrrange_end(AddrRange r)
|
|
{
|
|
return int128_add(r.start, r.size);
|
|
}
|
|
|
|
static AddrRange addrrange_shift(AddrRange range, Int128 delta)
|
|
{
|
|
int128_addto(&range.start, delta);
|
|
return range;
|
|
}
|
|
|
|
static bool addrrange_contains(AddrRange range, Int128 addr)
|
|
{
|
|
return int128_ge(addr, range.start)
|
|
&& int128_lt(addr, addrrange_end(range));
|
|
}
|
|
|
|
static bool addrrange_intersects(AddrRange r1, AddrRange r2)
|
|
{
|
|
return addrrange_contains(r1, r2.start)
|
|
|| addrrange_contains(r2, r1.start);
|
|
}
|
|
|
|
static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
|
|
{
|
|
Int128 start = int128_max(r1.start, r2.start);
|
|
Int128 end = int128_min(addrrange_end(r1), addrrange_end(r2));
|
|
return addrrange_make(start, int128_sub(end, start));
|
|
}
|
|
|
|
enum ListenerDirection { Forward, Reverse };
|
|
|
|
static bool memory_listener_match(MemoryListener *listener,
|
|
MemoryRegionSection *section)
|
|
{
|
|
return !listener->address_space_filter
|
|
|| listener->address_space_filter == section->address_space;
|
|
}
|
|
|
|
#define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, _args...) \
|
|
do { \
|
|
MemoryListener *_listener; \
|
|
\
|
|
switch (_direction) { \
|
|
case Forward: \
|
|
QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
|
|
if (_listener->_callback) { \
|
|
_listener->_callback(_listener, ##_args); \
|
|
} \
|
|
} \
|
|
break; \
|
|
case Reverse: \
|
|
QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
|
|
memory_listeners, link) { \
|
|
if (_listener->_callback) { \
|
|
_listener->_callback(_listener, ##_args); \
|
|
} \
|
|
} \
|
|
break; \
|
|
default: \
|
|
abort(); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define MEMORY_LISTENER_CALL(_callback, _direction, _section, _args...) \
|
|
do { \
|
|
MemoryListener *_listener; \
|
|
\
|
|
switch (_direction) { \
|
|
case Forward: \
|
|
QTAILQ_FOREACH(_listener, &memory_listeners, link) { \
|
|
if (_listener->_callback \
|
|
&& memory_listener_match(_listener, _section)) { \
|
|
_listener->_callback(_listener, _section, ##_args); \
|
|
} \
|
|
} \
|
|
break; \
|
|
case Reverse: \
|
|
QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \
|
|
memory_listeners, link) { \
|
|
if (_listener->_callback \
|
|
&& memory_listener_match(_listener, _section)) { \
|
|
_listener->_callback(_listener, _section, ##_args); \
|
|
} \
|
|
} \
|
|
break; \
|
|
default: \
|
|
abort(); \
|
|
} \
|
|
} while (0)
|
|
|
|
/* No need to ref/unref .mr, the FlatRange keeps it alive. */
|
|
#define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback, _args...) \
|
|
MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \
|
|
.mr = (fr)->mr, \
|
|
.address_space = (as), \
|
|
.offset_within_region = (fr)->offset_in_region, \
|
|
.size = (fr)->addr.size, \
|
|
.offset_within_address_space = int128_get64((fr)->addr.start), \
|
|
.readonly = (fr)->readonly, \
|
|
}), ##_args)
|
|
|
|
struct CoalescedMemoryRange {
|
|
AddrRange addr;
|
|
QTAILQ_ENTRY(CoalescedMemoryRange) link;
|
|
};
|
|
|
|
struct MemoryRegionIoeventfd {
|
|
AddrRange addr;
|
|
bool match_data;
|
|
uint64_t data;
|
|
EventNotifier *e;
|
|
};
|
|
|
|
static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a,
|
|
MemoryRegionIoeventfd b)
|
|
{
|
|
if (int128_lt(a.addr.start, b.addr.start)) {
|
|
return true;
|
|
} else if (int128_gt(a.addr.start, b.addr.start)) {
|
|
return false;
|
|
} else if (int128_lt(a.addr.size, b.addr.size)) {
|
|
return true;
|
|
} else if (int128_gt(a.addr.size, b.addr.size)) {
|
|
return false;
|
|
} else if (a.match_data < b.match_data) {
|
|
return true;
|
|
} else if (a.match_data > b.match_data) {
|
|
return false;
|
|
} else if (a.match_data) {
|
|
if (a.data < b.data) {
|
|
return true;
|
|
} else if (a.data > b.data) {
|
|
return false;
|
|
}
|
|
}
|
|
if (a.e < b.e) {
|
|
return true;
|
|
} else if (a.e > b.e) {
|
|
return false;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a,
|
|
MemoryRegionIoeventfd b)
|
|
{
|
|
return !memory_region_ioeventfd_before(a, b)
|
|
&& !memory_region_ioeventfd_before(b, a);
|
|
}
|
|
|
|
typedef struct FlatRange FlatRange;
|
|
typedef struct FlatView FlatView;
|
|
|
|
/* Range of memory in the global map. Addresses are absolute. */
|
|
struct FlatRange {
|
|
MemoryRegion *mr;
|
|
hwaddr offset_in_region;
|
|
AddrRange addr;
|
|
uint8_t dirty_log_mask;
|
|
bool romd_mode;
|
|
bool readonly;
|
|
};
|
|
|
|
/* Flattened global view of current active memory hierarchy. Kept in sorted
|
|
* order.
|
|
*/
|
|
struct FlatView {
|
|
struct rcu_head rcu;
|
|
unsigned ref;
|
|
FlatRange *ranges;
|
|
unsigned nr;
|
|
unsigned nr_allocated;
|
|
};
|
|
|
|
typedef struct AddressSpaceOps AddressSpaceOps;
|
|
|
|
#define FOR_EACH_FLAT_RANGE(var, view) \
|
|
for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
|
|
|
|
static bool flatrange_equal(FlatRange *a, FlatRange *b)
|
|
{
|
|
return a->mr == b->mr
|
|
&& addrrange_equal(a->addr, b->addr)
|
|
&& a->offset_in_region == b->offset_in_region
|
|
&& a->romd_mode == b->romd_mode
|
|
&& a->readonly == b->readonly;
|
|
}
|
|
|
|
static void flatview_init(FlatView *view)
|
|
{
|
|
view->ref = 1;
|
|
view->ranges = NULL;
|
|
view->nr = 0;
|
|
view->nr_allocated = 0;
|
|
}
|
|
|
|
/* Insert a range into a given position. Caller is responsible for maintaining
|
|
* sorting order.
|
|
*/
|
|
static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range)
|
|
{
|
|
if (view->nr == view->nr_allocated) {
|
|
view->nr_allocated = MAX(2 * view->nr, 10);
|
|
view->ranges = g_realloc(view->ranges,
|
|
view->nr_allocated * sizeof(*view->ranges));
|
|
}
|
|
memmove(view->ranges + pos + 1, view->ranges + pos,
|
|
(view->nr - pos) * sizeof(FlatRange));
|
|
view->ranges[pos] = *range;
|
|
memory_region_ref(range->mr);
|
|
++view->nr;
|
|
}
|
|
|
|
static void flatview_destroy(FlatView *view)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < view->nr; i++) {
|
|
memory_region_unref(view->ranges[i].mr);
|
|
}
|
|
g_free(view->ranges);
|
|
g_free(view);
|
|
}
|
|
|
|
static void flatview_ref(FlatView *view)
|
|
{
|
|
atomic_inc(&view->ref);
|
|
}
|
|
|
|
static void flatview_unref(FlatView *view)
|
|
{
|
|
if (atomic_fetch_dec(&view->ref) == 1) {
|
|
flatview_destroy(view);
|
|
}
|
|
}
|
|
|
|
static bool can_merge(FlatRange *r1, FlatRange *r2)
|
|
{
|
|
return int128_eq(addrrange_end(r1->addr), r2->addr.start)
|
|
&& r1->mr == r2->mr
|
|
&& int128_eq(int128_add(int128_make64(r1->offset_in_region),
|
|
r1->addr.size),
|
|
int128_make64(r2->offset_in_region))
|
|
&& r1->dirty_log_mask == r2->dirty_log_mask
|
|
&& r1->romd_mode == r2->romd_mode
|
|
&& r1->readonly == r2->readonly;
|
|
}
|
|
|
|
/* Attempt to simplify a view by merging adjacent ranges */
|
|
static void flatview_simplify(FlatView *view)
|
|
{
|
|
unsigned i, j;
|
|
|
|
i = 0;
|
|
while (i < view->nr) {
|
|
j = i + 1;
|
|
while (j < view->nr
|
|
&& can_merge(&view->ranges[j-1], &view->ranges[j])) {
|
|
int128_addto(&view->ranges[i].addr.size, view->ranges[j].addr.size);
|
|
++j;
|
|
}
|
|
++i;
|
|
memmove(&view->ranges[i], &view->ranges[j],
|
|
(view->nr - j) * sizeof(view->ranges[j]));
|
|
view->nr -= j - i;
|
|
}
|
|
}
|
|
|
|
static bool memory_region_big_endian(MemoryRegion *mr)
|
|
{
|
|
#ifdef TARGET_WORDS_BIGENDIAN
|
|
return mr->ops->endianness != DEVICE_LITTLE_ENDIAN;
|
|
#else
|
|
return mr->ops->endianness == DEVICE_BIG_ENDIAN;
|
|
#endif
|
|
}
|
|
|
|
static bool memory_region_wrong_endianness(MemoryRegion *mr)
|
|
{
|
|
#ifdef TARGET_WORDS_BIGENDIAN
|
|
return mr->ops->endianness == DEVICE_LITTLE_ENDIAN;
|
|
#else
|
|
return mr->ops->endianness == DEVICE_BIG_ENDIAN;
|
|
#endif
|
|
}
|
|
|
|
static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
|
|
{
|
|
if (memory_region_wrong_endianness(mr)) {
|
|
switch (size) {
|
|
case 1:
|
|
break;
|
|
case 2:
|
|
*data = bswap16(*data);
|
|
break;
|
|
case 4:
|
|
*data = bswap32(*data);
|
|
break;
|
|
case 8:
|
|
*data = bswap64(*data);
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
static MemTxResult memory_region_oldmmio_read_accessor(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *value,
|
|
unsigned size,
|
|
unsigned shift,
|
|
uint64_t mask,
|
|
MemTxAttrs attrs)
|
|
{
|
|
uint64_t tmp;
|
|
|
|
tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr);
|
|
trace_memory_region_ops_read(mr, addr, tmp, size);
|
|
*value |= (tmp & mask) << shift;
|
|
return MEMTX_OK;
|
|
}
|
|
|
|
static MemTxResult memory_region_read_accessor(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *value,
|
|
unsigned size,
|
|
unsigned shift,
|
|
uint64_t mask,
|
|
MemTxAttrs attrs)
|
|
{
|
|
uint64_t tmp;
|
|
|
|
tmp = mr->ops->read(mr->opaque, addr, size);
|
|
trace_memory_region_ops_read(mr, addr, tmp, size);
|
|
*value |= (tmp & mask) << shift;
|
|
return MEMTX_OK;
|
|
}
|
|
|
|
static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *value,
|
|
unsigned size,
|
|
unsigned shift,
|
|
uint64_t mask,
|
|
MemTxAttrs attrs)
|
|
{
|
|
uint64_t tmp = 0;
|
|
MemTxResult r;
|
|
|
|
r = mr->ops->read_with_attrs(mr->opaque, addr, &tmp, size, attrs);
|
|
trace_memory_region_ops_read(mr, addr, tmp, size);
|
|
*value |= (tmp & mask) << shift;
|
|
return r;
|
|
}
|
|
|
|
static MemTxResult memory_region_oldmmio_write_accessor(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *value,
|
|
unsigned size,
|
|
unsigned shift,
|
|
uint64_t mask,
|
|
MemTxAttrs attrs)
|
|
{
|
|
uint64_t tmp;
|
|
|
|
tmp = (*value >> shift) & mask;
|
|
trace_memory_region_ops_write(mr, addr, tmp, size);
|
|
mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp);
|
|
return MEMTX_OK;
|
|
}
|
|
|
|
static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *value,
|
|
unsigned size,
|
|
unsigned shift,
|
|
uint64_t mask,
|
|
MemTxAttrs attrs)
|
|
{
|
|
uint64_t tmp;
|
|
|
|
tmp = (*value >> shift) & mask;
|
|
trace_memory_region_ops_write(mr, addr, tmp, size);
|
|
mr->ops->write(mr->opaque, addr, tmp, size);
|
|
return MEMTX_OK;
|
|
}
|
|
|
|
static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *value,
|
|
unsigned size,
|
|
unsigned shift,
|
|
uint64_t mask,
|
|
MemTxAttrs attrs)
|
|
{
|
|
uint64_t tmp;
|
|
|
|
tmp = (*value >> shift) & mask;
|
|
trace_memory_region_ops_write(mr, addr, tmp, size);
|
|
return mr->ops->write_with_attrs(mr->opaque, addr, tmp, size, attrs);
|
|
}
|
|
|
|
static MemTxResult access_with_adjusted_size(hwaddr addr,
|
|
uint64_t *value,
|
|
unsigned size,
|
|
unsigned access_size_min,
|
|
unsigned access_size_max,
|
|
MemTxResult (*access)(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *value,
|
|
unsigned size,
|
|
unsigned shift,
|
|
uint64_t mask,
|
|
MemTxAttrs attrs),
|
|
MemoryRegion *mr,
|
|
MemTxAttrs attrs)
|
|
{
|
|
uint64_t access_mask;
|
|
unsigned access_size;
|
|
unsigned i;
|
|
MemTxResult r = MEMTX_OK;
|
|
|
|
if (!access_size_min) {
|
|
access_size_min = 1;
|
|
}
|
|
if (!access_size_max) {
|
|
access_size_max = 4;
|
|
}
|
|
|
|
/* FIXME: support unaligned access? */
|
|
access_size = MAX(MIN(size, access_size_max), access_size_min);
|
|
access_mask = -1ULL >> (64 - access_size * 8);
|
|
if (memory_region_big_endian(mr)) {
|
|
for (i = 0; i < size; i += access_size) {
|
|
r |= access(mr, addr + i, value, access_size,
|
|
(size - access_size - i) * 8, access_mask, attrs);
|
|
}
|
|
} else {
|
|
for (i = 0; i < size; i += access_size) {
|
|
r |= access(mr, addr + i, value, access_size, i * 8,
|
|
access_mask, attrs);
|
|
}
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
|
|
{
|
|
AddressSpace *as;
|
|
|
|
while (mr->container) {
|
|
mr = mr->container;
|
|
}
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
if (mr == as->root) {
|
|
return as;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Render a memory region into the global view. Ranges in @view obscure
|
|
* ranges in @mr.
|
|
*/
|
|
static void render_memory_region(FlatView *view,
|
|
MemoryRegion *mr,
|
|
Int128 base,
|
|
AddrRange clip,
|
|
bool readonly)
|
|
{
|
|
MemoryRegion *subregion;
|
|
unsigned i;
|
|
hwaddr offset_in_region;
|
|
Int128 remain;
|
|
Int128 now;
|
|
FlatRange fr;
|
|
AddrRange tmp;
|
|
|
|
if (!mr->enabled) {
|
|
return;
|
|
}
|
|
|
|
int128_addto(&base, int128_make64(mr->addr));
|
|
readonly |= mr->readonly;
|
|
|
|
tmp = addrrange_make(base, mr->size);
|
|
|
|
if (!addrrange_intersects(tmp, clip)) {
|
|
return;
|
|
}
|
|
|
|
clip = addrrange_intersection(tmp, clip);
|
|
|
|
if (mr->alias) {
|
|
int128_subfrom(&base, int128_make64(mr->alias->addr));
|
|
int128_subfrom(&base, int128_make64(mr->alias_offset));
|
|
render_memory_region(view, mr->alias, base, clip, readonly);
|
|
return;
|
|
}
|
|
|
|
/* Render subregions in priority order. */
|
|
QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
|
|
render_memory_region(view, subregion, base, clip, readonly);
|
|
}
|
|
|
|
if (!mr->terminates) {
|
|
return;
|
|
}
|
|
|
|
offset_in_region = int128_get64(int128_sub(clip.start, base));
|
|
base = clip.start;
|
|
remain = clip.size;
|
|
|
|
fr.mr = mr;
|
|
fr.dirty_log_mask = memory_region_get_dirty_log_mask(mr);
|
|
fr.romd_mode = mr->romd_mode;
|
|
fr.readonly = readonly;
|
|
|
|
/* Render the region itself into any gaps left by the current view. */
|
|
for (i = 0; i < view->nr && int128_nz(remain); ++i) {
|
|
if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
|
|
continue;
|
|
}
|
|
if (int128_lt(base, view->ranges[i].addr.start)) {
|
|
now = int128_min(remain,
|
|
int128_sub(view->ranges[i].addr.start, base));
|
|
fr.offset_in_region = offset_in_region;
|
|
fr.addr = addrrange_make(base, now);
|
|
flatview_insert(view, i, &fr);
|
|
++i;
|
|
int128_addto(&base, now);
|
|
offset_in_region += int128_get64(now);
|
|
int128_subfrom(&remain, now);
|
|
}
|
|
now = int128_sub(int128_min(int128_add(base, remain),
|
|
addrrange_end(view->ranges[i].addr)),
|
|
base);
|
|
int128_addto(&base, now);
|
|
offset_in_region += int128_get64(now);
|
|
int128_subfrom(&remain, now);
|
|
}
|
|
if (int128_nz(remain)) {
|
|
fr.offset_in_region = offset_in_region;
|
|
fr.addr = addrrange_make(base, remain);
|
|
flatview_insert(view, i, &fr);
|
|
}
|
|
}
|
|
|
|
/* Render a memory topology into a list of disjoint absolute ranges. */
|
|
static FlatView *generate_memory_topology(MemoryRegion *mr)
|
|
{
|
|
FlatView *view;
|
|
|
|
view = g_new(FlatView, 1);
|
|
flatview_init(view);
|
|
|
|
if (mr) {
|
|
render_memory_region(view, mr, int128_zero(),
|
|
addrrange_make(int128_zero(), int128_2_64()), false);
|
|
}
|
|
flatview_simplify(view);
|
|
|
|
return view;
|
|
}
|
|
|
|
static void address_space_add_del_ioeventfds(AddressSpace *as,
|
|
MemoryRegionIoeventfd *fds_new,
|
|
unsigned fds_new_nb,
|
|
MemoryRegionIoeventfd *fds_old,
|
|
unsigned fds_old_nb)
|
|
{
|
|
unsigned iold, inew;
|
|
MemoryRegionIoeventfd *fd;
|
|
MemoryRegionSection section;
|
|
|
|
/* Generate a symmetric difference of the old and new fd sets, adding
|
|
* and deleting as necessary.
|
|
*/
|
|
|
|
iold = inew = 0;
|
|
while (iold < fds_old_nb || inew < fds_new_nb) {
|
|
if (iold < fds_old_nb
|
|
&& (inew == fds_new_nb
|
|
|| memory_region_ioeventfd_before(fds_old[iold],
|
|
fds_new[inew]))) {
|
|
fd = &fds_old[iold];
|
|
section = (MemoryRegionSection) {
|
|
.address_space = as,
|
|
.offset_within_address_space = int128_get64(fd->addr.start),
|
|
.size = fd->addr.size,
|
|
};
|
|
MEMORY_LISTENER_CALL(eventfd_del, Forward, §ion,
|
|
fd->match_data, fd->data, fd->e);
|
|
++iold;
|
|
} else if (inew < fds_new_nb
|
|
&& (iold == fds_old_nb
|
|
|| memory_region_ioeventfd_before(fds_new[inew],
|
|
fds_old[iold]))) {
|
|
fd = &fds_new[inew];
|
|
section = (MemoryRegionSection) {
|
|
.address_space = as,
|
|
.offset_within_address_space = int128_get64(fd->addr.start),
|
|
.size = fd->addr.size,
|
|
};
|
|
MEMORY_LISTENER_CALL(eventfd_add, Reverse, §ion,
|
|
fd->match_data, fd->data, fd->e);
|
|
++inew;
|
|
} else {
|
|
++iold;
|
|
++inew;
|
|
}
|
|
}
|
|
}
|
|
|
|
static FlatView *address_space_get_flatview(AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
|
|
rcu_read_lock();
|
|
view = atomic_rcu_read(&as->current_map);
|
|
flatview_ref(view);
|
|
rcu_read_unlock();
|
|
return view;
|
|
}
|
|
|
|
static void address_space_update_ioeventfds(AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
unsigned ioeventfd_nb = 0;
|
|
MemoryRegionIoeventfd *ioeventfds = NULL;
|
|
AddrRange tmp;
|
|
unsigned i;
|
|
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
for (i = 0; i < fr->mr->ioeventfd_nb; ++i) {
|
|
tmp = addrrange_shift(fr->mr->ioeventfds[i].addr,
|
|
int128_sub(fr->addr.start,
|
|
int128_make64(fr->offset_in_region)));
|
|
if (addrrange_intersects(fr->addr, tmp)) {
|
|
++ioeventfd_nb;
|
|
ioeventfds = g_realloc(ioeventfds,
|
|
ioeventfd_nb * sizeof(*ioeventfds));
|
|
ioeventfds[ioeventfd_nb-1] = fr->mr->ioeventfds[i];
|
|
ioeventfds[ioeventfd_nb-1].addr = tmp;
|
|
}
|
|
}
|
|
}
|
|
|
|
address_space_add_del_ioeventfds(as, ioeventfds, ioeventfd_nb,
|
|
as->ioeventfds, as->ioeventfd_nb);
|
|
|
|
g_free(as->ioeventfds);
|
|
as->ioeventfds = ioeventfds;
|
|
as->ioeventfd_nb = ioeventfd_nb;
|
|
flatview_unref(view);
|
|
}
|
|
|
|
static void address_space_update_topology_pass(AddressSpace *as,
|
|
const FlatView *old_view,
|
|
const FlatView *new_view,
|
|
bool adding)
|
|
{
|
|
unsigned iold, inew;
|
|
FlatRange *frold, *frnew;
|
|
|
|
/* Generate a symmetric difference of the old and new memory maps.
|
|
* Kill ranges in the old map, and instantiate ranges in the new map.
|
|
*/
|
|
iold = inew = 0;
|
|
while (iold < old_view->nr || inew < new_view->nr) {
|
|
if (iold < old_view->nr) {
|
|
frold = &old_view->ranges[iold];
|
|
} else {
|
|
frold = NULL;
|
|
}
|
|
if (inew < new_view->nr) {
|
|
frnew = &new_view->ranges[inew];
|
|
} else {
|
|
frnew = NULL;
|
|
}
|
|
|
|
if (frold
|
|
&& (!frnew
|
|
|| int128_lt(frold->addr.start, frnew->addr.start)
|
|
|| (int128_eq(frold->addr.start, frnew->addr.start)
|
|
&& !flatrange_equal(frold, frnew)))) {
|
|
/* In old but not in new, or in both but attributes changed. */
|
|
|
|
if (!adding) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del);
|
|
}
|
|
|
|
++iold;
|
|
} else if (frold && frnew && flatrange_equal(frold, frnew)) {
|
|
/* In both and unchanged (except logging may have changed) */
|
|
|
|
if (adding) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop);
|
|
if (frnew->dirty_log_mask & ~frold->dirty_log_mask) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start,
|
|
frold->dirty_log_mask,
|
|
frnew->dirty_log_mask);
|
|
}
|
|
if (frold->dirty_log_mask & ~frnew->dirty_log_mask) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop,
|
|
frold->dirty_log_mask,
|
|
frnew->dirty_log_mask);
|
|
}
|
|
}
|
|
|
|
++iold;
|
|
++inew;
|
|
} else {
|
|
/* In new */
|
|
|
|
if (adding) {
|
|
MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add);
|
|
}
|
|
|
|
++inew;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void address_space_update_topology(AddressSpace *as)
|
|
{
|
|
FlatView *old_view = address_space_get_flatview(as);
|
|
FlatView *new_view = generate_memory_topology(as->root);
|
|
|
|
address_space_update_topology_pass(as, old_view, new_view, false);
|
|
address_space_update_topology_pass(as, old_view, new_view, true);
|
|
|
|
/* Writes are protected by the BQL. */
|
|
atomic_rcu_set(&as->current_map, new_view);
|
|
call_rcu(old_view, flatview_unref, rcu);
|
|
|
|
/* Note that all the old MemoryRegions are still alive up to this
|
|
* point. This relieves most MemoryListeners from the need to
|
|
* ref/unref the MemoryRegions they get---unless they use them
|
|
* outside the iothread mutex, in which case precise reference
|
|
* counting is necessary.
|
|
*/
|
|
flatview_unref(old_view);
|
|
|
|
address_space_update_ioeventfds(as);
|
|
}
|
|
|
|
void memory_region_transaction_begin(void)
|
|
{
|
|
qemu_flush_coalesced_mmio_buffer();
|
|
++memory_region_transaction_depth;
|
|
}
|
|
|
|
static void memory_region_clear_pending(void)
|
|
{
|
|
memory_region_update_pending = false;
|
|
ioeventfd_update_pending = false;
|
|
}
|
|
|
|
void memory_region_transaction_commit(void)
|
|
{
|
|
AddressSpace *as;
|
|
|
|
assert(memory_region_transaction_depth);
|
|
--memory_region_transaction_depth;
|
|
if (!memory_region_transaction_depth) {
|
|
if (memory_region_update_pending) {
|
|
MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
address_space_update_topology(as);
|
|
}
|
|
|
|
MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
|
|
} else if (ioeventfd_update_pending) {
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
address_space_update_ioeventfds(as);
|
|
}
|
|
}
|
|
memory_region_clear_pending();
|
|
}
|
|
}
|
|
|
|
static void memory_region_destructor_none(MemoryRegion *mr)
|
|
{
|
|
}
|
|
|
|
static void memory_region_destructor_ram(MemoryRegion *mr)
|
|
{
|
|
qemu_ram_free(mr->ram_addr);
|
|
}
|
|
|
|
static void memory_region_destructor_rom_device(MemoryRegion *mr)
|
|
{
|
|
qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK);
|
|
}
|
|
|
|
static bool memory_region_need_escape(char c)
|
|
{
|
|
return c == '/' || c == '[' || c == '\\' || c == ']';
|
|
}
|
|
|
|
static char *memory_region_escape_name(const char *name)
|
|
{
|
|
const char *p;
|
|
char *escaped, *q;
|
|
uint8_t c;
|
|
size_t bytes = 0;
|
|
|
|
for (p = name; *p; p++) {
|
|
bytes += memory_region_need_escape(*p) ? 4 : 1;
|
|
}
|
|
if (bytes == p - name) {
|
|
return g_memdup(name, bytes + 1);
|
|
}
|
|
|
|
escaped = g_malloc(bytes + 1);
|
|
for (p = name, q = escaped; *p; p++) {
|
|
c = *p;
|
|
if (unlikely(memory_region_need_escape(c))) {
|
|
*q++ = '\\';
|
|
*q++ = 'x';
|
|
*q++ = "0123456789abcdef"[c >> 4];
|
|
c = "0123456789abcdef"[c & 15];
|
|
}
|
|
*q++ = c;
|
|
}
|
|
*q = 0;
|
|
return escaped;
|
|
}
|
|
|
|
void memory_region_init(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
object_initialize(mr, sizeof(*mr), TYPE_MEMORY_REGION);
|
|
mr->size = int128_make64(size);
|
|
if (size == UINT64_MAX) {
|
|
mr->size = int128_2_64();
|
|
}
|
|
mr->name = g_strdup(name);
|
|
mr->owner = owner;
|
|
|
|
if (name) {
|
|
char *escaped_name = memory_region_escape_name(name);
|
|
char *name_array = g_strdup_printf("%s[*]", escaped_name);
|
|
|
|
if (!owner) {
|
|
owner = container_get(qdev_get_machine(), "/unattached");
|
|
}
|
|
|
|
object_property_add_child(owner, name_array, OBJECT(mr), &error_abort);
|
|
object_unref(OBJECT(mr));
|
|
g_free(name_array);
|
|
g_free(escaped_name);
|
|
}
|
|
}
|
|
|
|
static void memory_region_get_addr(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
uint64_t value = mr->addr;
|
|
|
|
visit_type_uint64(v, &value, name, errp);
|
|
}
|
|
|
|
static void memory_region_get_container(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
gchar *path = (gchar *)"";
|
|
|
|
if (mr->container) {
|
|
path = object_get_canonical_path(OBJECT(mr->container));
|
|
}
|
|
visit_type_str(v, &path, name, errp);
|
|
if (mr->container) {
|
|
g_free(path);
|
|
}
|
|
}
|
|
|
|
static Object *memory_region_resolve_container(Object *obj, void *opaque,
|
|
const char *part)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
|
|
return OBJECT(mr->container);
|
|
}
|
|
|
|
static void memory_region_get_priority(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
int32_t value = mr->priority;
|
|
|
|
visit_type_int32(v, &value, name, errp);
|
|
}
|
|
|
|
static bool memory_region_get_may_overlap(Object *obj, Error **errp)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
|
|
return mr->may_overlap;
|
|
}
|
|
|
|
static void memory_region_get_size(Object *obj, Visitor *v, void *opaque,
|
|
const char *name, Error **errp)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
uint64_t value = memory_region_size(mr);
|
|
|
|
visit_type_uint64(v, &value, name, errp);
|
|
}
|
|
|
|
static void memory_region_initfn(Object *obj)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
ObjectProperty *op;
|
|
|
|
mr->ops = &unassigned_mem_ops;
|
|
mr->ram_addr = RAM_ADDR_INVALID;
|
|
mr->enabled = true;
|
|
mr->romd_mode = true;
|
|
mr->global_locking = true;
|
|
mr->destructor = memory_region_destructor_none;
|
|
QTAILQ_INIT(&mr->subregions);
|
|
QTAILQ_INIT(&mr->coalesced);
|
|
|
|
op = object_property_add(OBJECT(mr), "container",
|
|
"link<" TYPE_MEMORY_REGION ">",
|
|
memory_region_get_container,
|
|
NULL, /* memory_region_set_container */
|
|
NULL, NULL, &error_abort);
|
|
op->resolve = memory_region_resolve_container;
|
|
|
|
object_property_add(OBJECT(mr), "addr", "uint64",
|
|
memory_region_get_addr,
|
|
NULL, /* memory_region_set_addr */
|
|
NULL, NULL, &error_abort);
|
|
object_property_add(OBJECT(mr), "priority", "uint32",
|
|
memory_region_get_priority,
|
|
NULL, /* memory_region_set_priority */
|
|
NULL, NULL, &error_abort);
|
|
object_property_add_bool(OBJECT(mr), "may-overlap",
|
|
memory_region_get_may_overlap,
|
|
NULL, /* memory_region_set_may_overlap */
|
|
&error_abort);
|
|
object_property_add(OBJECT(mr), "size", "uint64",
|
|
memory_region_get_size,
|
|
NULL, /* memory_region_set_size, */
|
|
NULL, NULL, &error_abort);
|
|
}
|
|
|
|
static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
|
|
unsigned size)
|
|
{
|
|
#ifdef DEBUG_UNASSIGNED
|
|
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
|
|
#endif
|
|
if (current_cpu != NULL) {
|
|
cpu_unassigned_access(current_cpu, addr, false, false, 0, size);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void unassigned_mem_write(void *opaque, hwaddr addr,
|
|
uint64_t val, unsigned size)
|
|
{
|
|
#ifdef DEBUG_UNASSIGNED
|
|
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val);
|
|
#endif
|
|
if (current_cpu != NULL) {
|
|
cpu_unassigned_access(current_cpu, addr, true, false, 0, size);
|
|
}
|
|
}
|
|
|
|
static bool unassigned_mem_accepts(void *opaque, hwaddr addr,
|
|
unsigned size, bool is_write)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
const MemoryRegionOps unassigned_mem_ops = {
|
|
.valid.accepts = unassigned_mem_accepts,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
};
|
|
|
|
bool memory_region_access_valid(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size,
|
|
bool is_write)
|
|
{
|
|
int access_size_min, access_size_max;
|
|
int access_size, i;
|
|
|
|
if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
|
|
return false;
|
|
}
|
|
|
|
if (!mr->ops->valid.accepts) {
|
|
return true;
|
|
}
|
|
|
|
access_size_min = mr->ops->valid.min_access_size;
|
|
if (!mr->ops->valid.min_access_size) {
|
|
access_size_min = 1;
|
|
}
|
|
|
|
access_size_max = mr->ops->valid.max_access_size;
|
|
if (!mr->ops->valid.max_access_size) {
|
|
access_size_max = 4;
|
|
}
|
|
|
|
access_size = MAX(MIN(size, access_size_max), access_size_min);
|
|
for (i = 0; i < size; i += access_size) {
|
|
if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size,
|
|
is_write)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *pval,
|
|
unsigned size,
|
|
MemTxAttrs attrs)
|
|
{
|
|
*pval = 0;
|
|
|
|
if (mr->ops->read) {
|
|
return access_with_adjusted_size(addr, pval, size,
|
|
mr->ops->impl.min_access_size,
|
|
mr->ops->impl.max_access_size,
|
|
memory_region_read_accessor,
|
|
mr, attrs);
|
|
} else if (mr->ops->read_with_attrs) {
|
|
return access_with_adjusted_size(addr, pval, size,
|
|
mr->ops->impl.min_access_size,
|
|
mr->ops->impl.max_access_size,
|
|
memory_region_read_with_attrs_accessor,
|
|
mr, attrs);
|
|
} else {
|
|
return access_with_adjusted_size(addr, pval, size, 1, 4,
|
|
memory_region_oldmmio_read_accessor,
|
|
mr, attrs);
|
|
}
|
|
}
|
|
|
|
MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t *pval,
|
|
unsigned size,
|
|
MemTxAttrs attrs)
|
|
{
|
|
MemTxResult r;
|
|
|
|
if (!memory_region_access_valid(mr, addr, size, false)) {
|
|
*pval = unassigned_mem_read(mr, addr, size);
|
|
return MEMTX_DECODE_ERROR;
|
|
}
|
|
|
|
r = memory_region_dispatch_read1(mr, addr, pval, size, attrs);
|
|
adjust_endianness(mr, pval, size);
|
|
return r;
|
|
}
|
|
|
|
/* Return true if an eventfd was signalled */
|
|
static bool memory_region_dispatch_write_eventfds(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t data,
|
|
unsigned size,
|
|
MemTxAttrs attrs)
|
|
{
|
|
MemoryRegionIoeventfd ioeventfd = {
|
|
.addr = addrrange_make(int128_make64(addr), int128_make64(size)),
|
|
.data = data,
|
|
};
|
|
unsigned i;
|
|
|
|
for (i = 0; i < mr->ioeventfd_nb; i++) {
|
|
ioeventfd.match_data = mr->ioeventfds[i].match_data;
|
|
ioeventfd.e = mr->ioeventfds[i].e;
|
|
|
|
if (memory_region_ioeventfd_equal(ioeventfd, mr->ioeventfds[i])) {
|
|
event_notifier_set(ioeventfd.e);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
uint64_t data,
|
|
unsigned size,
|
|
MemTxAttrs attrs)
|
|
{
|
|
if (!memory_region_access_valid(mr, addr, size, true)) {
|
|
unassigned_mem_write(mr, addr, data, size);
|
|
return MEMTX_DECODE_ERROR;
|
|
}
|
|
|
|
adjust_endianness(mr, &data, size);
|
|
|
|
if ((!kvm_eventfds_enabled()) &&
|
|
memory_region_dispatch_write_eventfds(mr, addr, data, size, attrs)) {
|
|
return MEMTX_OK;
|
|
}
|
|
|
|
if (mr->ops->write) {
|
|
return access_with_adjusted_size(addr, &data, size,
|
|
mr->ops->impl.min_access_size,
|
|
mr->ops->impl.max_access_size,
|
|
memory_region_write_accessor, mr,
|
|
attrs);
|
|
} else if (mr->ops->write_with_attrs) {
|
|
return
|
|
access_with_adjusted_size(addr, &data, size,
|
|
mr->ops->impl.min_access_size,
|
|
mr->ops->impl.max_access_size,
|
|
memory_region_write_with_attrs_accessor,
|
|
mr, attrs);
|
|
} else {
|
|
return access_with_adjusted_size(addr, &data, size, 1, 4,
|
|
memory_region_oldmmio_write_accessor,
|
|
mr, attrs);
|
|
}
|
|
}
|
|
|
|
void memory_region_init_io(MemoryRegion *mr,
|
|
Object *owner,
|
|
const MemoryRegionOps *ops,
|
|
void *opaque,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ops = ops ? ops : &unassigned_mem_ops;
|
|
mr->opaque = opaque;
|
|
mr->terminates = true;
|
|
}
|
|
|
|
void memory_region_init_ram(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
Error **errp)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->ram_addr = qemu_ram_alloc(size, mr, errp);
|
|
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
|
|
}
|
|
|
|
void memory_region_init_resizeable_ram(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
uint64_t max_size,
|
|
void (*resized)(const char*,
|
|
uint64_t length,
|
|
void *host),
|
|
Error **errp)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->ram_addr = qemu_ram_alloc_resizeable(size, max_size, resized, mr, errp);
|
|
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
|
|
}
|
|
|
|
#ifdef __linux__
|
|
void memory_region_init_ram_from_file(MemoryRegion *mr,
|
|
struct Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
bool share,
|
|
const char *path,
|
|
Error **errp)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->ram_addr = qemu_ram_alloc_from_file(size, mr, share, path, errp);
|
|
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
|
|
}
|
|
#endif
|
|
|
|
void memory_region_init_ram_ptr(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
uint64_t size,
|
|
void *ptr)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ram = true;
|
|
mr->terminates = true;
|
|
mr->destructor = memory_region_destructor_ram;
|
|
mr->dirty_log_mask = tcg_enabled() ? (1 << DIRTY_MEMORY_CODE) : 0;
|
|
|
|
/* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
|
|
assert(ptr != NULL);
|
|
mr->ram_addr = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
|
|
}
|
|
|
|
void memory_region_set_skip_dump(MemoryRegion *mr)
|
|
{
|
|
mr->skip_dump = true;
|
|
}
|
|
|
|
void memory_region_init_alias(MemoryRegion *mr,
|
|
Object *owner,
|
|
const char *name,
|
|
MemoryRegion *orig,
|
|
hwaddr offset,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->alias = orig;
|
|
mr->alias_offset = offset;
|
|
}
|
|
|
|
void memory_region_init_rom_device(MemoryRegion *mr,
|
|
Object *owner,
|
|
const MemoryRegionOps *ops,
|
|
void *opaque,
|
|
const char *name,
|
|
uint64_t size,
|
|
Error **errp)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->ops = ops;
|
|
mr->opaque = opaque;
|
|
mr->terminates = true;
|
|
mr->rom_device = true;
|
|
mr->destructor = memory_region_destructor_rom_device;
|
|
mr->ram_addr = qemu_ram_alloc(size, mr, errp);
|
|
}
|
|
|
|
void memory_region_init_iommu(MemoryRegion *mr,
|
|
Object *owner,
|
|
const MemoryRegionIOMMUOps *ops,
|
|
const char *name,
|
|
uint64_t size)
|
|
{
|
|
memory_region_init(mr, owner, name, size);
|
|
mr->iommu_ops = ops,
|
|
mr->terminates = true; /* then re-forwards */
|
|
notifier_list_init(&mr->iommu_notify);
|
|
}
|
|
|
|
static void memory_region_finalize(Object *obj)
|
|
{
|
|
MemoryRegion *mr = MEMORY_REGION(obj);
|
|
|
|
assert(!mr->container);
|
|
|
|
/* We know the region is not visible in any address space (it
|
|
* does not have a container and cannot be a root either because
|
|
* it has no references, so we can blindly clear mr->enabled.
|
|
* memory_region_set_enabled instead could trigger a transaction
|
|
* and cause an infinite loop.
|
|
*/
|
|
mr->enabled = false;
|
|
memory_region_transaction_begin();
|
|
while (!QTAILQ_EMPTY(&mr->subregions)) {
|
|
MemoryRegion *subregion = QTAILQ_FIRST(&mr->subregions);
|
|
memory_region_del_subregion(mr, subregion);
|
|
}
|
|
memory_region_transaction_commit();
|
|
|
|
mr->destructor(mr);
|
|
memory_region_clear_coalescing(mr);
|
|
g_free((char *)mr->name);
|
|
g_free(mr->ioeventfds);
|
|
}
|
|
|
|
Object *memory_region_owner(MemoryRegion *mr)
|
|
{
|
|
Object *obj = OBJECT(mr);
|
|
return obj->parent;
|
|
}
|
|
|
|
void memory_region_ref(MemoryRegion *mr)
|
|
{
|
|
/* MMIO callbacks most likely will access data that belongs
|
|
* to the owner, hence the need to ref/unref the owner whenever
|
|
* the memory region is in use.
|
|
*
|
|
* The memory region is a child of its owner. As long as the
|
|
* owner doesn't call unparent itself on the memory region,
|
|
* ref-ing the owner will also keep the memory region alive.
|
|
* Memory regions without an owner are supposed to never go away;
|
|
* we do not ref/unref them because it slows down DMA sensibly.
|
|
*/
|
|
if (mr && mr->owner) {
|
|
object_ref(mr->owner);
|
|
}
|
|
}
|
|
|
|
void memory_region_unref(MemoryRegion *mr)
|
|
{
|
|
if (mr && mr->owner) {
|
|
object_unref(mr->owner);
|
|
}
|
|
}
|
|
|
|
uint64_t memory_region_size(MemoryRegion *mr)
|
|
{
|
|
if (int128_eq(mr->size, int128_2_64())) {
|
|
return UINT64_MAX;
|
|
}
|
|
return int128_get64(mr->size);
|
|
}
|
|
|
|
const char *memory_region_name(const MemoryRegion *mr)
|
|
{
|
|
if (!mr->name) {
|
|
((MemoryRegion *)mr)->name =
|
|
object_get_canonical_path_component(OBJECT(mr));
|
|
}
|
|
return mr->name;
|
|
}
|
|
|
|
bool memory_region_is_skip_dump(MemoryRegion *mr)
|
|
{
|
|
return mr->skip_dump;
|
|
}
|
|
|
|
uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr)
|
|
{
|
|
uint8_t mask = mr->dirty_log_mask;
|
|
if (global_dirty_log) {
|
|
mask |= (1 << DIRTY_MEMORY_MIGRATION);
|
|
}
|
|
return mask;
|
|
}
|
|
|
|
bool memory_region_is_logging(MemoryRegion *mr, uint8_t client)
|
|
{
|
|
return memory_region_get_dirty_log_mask(mr) & (1 << client);
|
|
}
|
|
|
|
void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n)
|
|
{
|
|
notifier_list_add(&mr->iommu_notify, n);
|
|
}
|
|
|
|
void memory_region_iommu_replay(MemoryRegion *mr, Notifier *n,
|
|
hwaddr granularity, bool is_write)
|
|
{
|
|
hwaddr addr;
|
|
IOMMUTLBEntry iotlb;
|
|
|
|
for (addr = 0; addr < memory_region_size(mr); addr += granularity) {
|
|
iotlb = mr->iommu_ops->translate(mr, addr, is_write);
|
|
if (iotlb.perm != IOMMU_NONE) {
|
|
n->notify(n, &iotlb);
|
|
}
|
|
|
|
/* if (2^64 - MR size) < granularity, it's possible to get an
|
|
* infinite loop here. This should catch such a wraparound */
|
|
if ((addr + granularity) < addr) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void memory_region_unregister_iommu_notifier(Notifier *n)
|
|
{
|
|
notifier_remove(n);
|
|
}
|
|
|
|
void memory_region_notify_iommu(MemoryRegion *mr,
|
|
IOMMUTLBEntry entry)
|
|
{
|
|
assert(memory_region_is_iommu(mr));
|
|
notifier_list_notify(&mr->iommu_notify, &entry);
|
|
}
|
|
|
|
void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
|
|
{
|
|
uint8_t mask = 1 << client;
|
|
uint8_t old_logging;
|
|
|
|
assert(client == DIRTY_MEMORY_VGA);
|
|
old_logging = mr->vga_logging_count;
|
|
mr->vga_logging_count += log ? 1 : -1;
|
|
if (!!old_logging == !!mr->vga_logging_count) {
|
|
return;
|
|
}
|
|
|
|
memory_region_transaction_begin();
|
|
mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask);
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size, unsigned client)
|
|
{
|
|
assert(mr->ram_addr != RAM_ADDR_INVALID);
|
|
return cpu_physical_memory_get_dirty(mr->ram_addr + addr, size, client);
|
|
}
|
|
|
|
void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size)
|
|
{
|
|
assert(mr->ram_addr != RAM_ADDR_INVALID);
|
|
cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size,
|
|
memory_region_get_dirty_log_mask(mr));
|
|
}
|
|
|
|
bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size, unsigned client)
|
|
{
|
|
assert(mr->ram_addr != RAM_ADDR_INVALID);
|
|
return cpu_physical_memory_test_and_clear_dirty(mr->ram_addr + addr,
|
|
size, client);
|
|
}
|
|
|
|
|
|
void memory_region_sync_dirty_bitmap(MemoryRegion *mr)
|
|
{
|
|
AddressSpace *as;
|
|
FlatRange *fr;
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
FlatView *view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
if (fr->mr == mr) {
|
|
MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
|
|
}
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
}
|
|
|
|
void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
|
|
{
|
|
if (mr->readonly != readonly) {
|
|
memory_region_transaction_begin();
|
|
mr->readonly = readonly;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
}
|
|
|
|
void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode)
|
|
{
|
|
if (mr->romd_mode != romd_mode) {
|
|
memory_region_transaction_begin();
|
|
mr->romd_mode = romd_mode;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
}
|
|
|
|
void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr,
|
|
hwaddr size, unsigned client)
|
|
{
|
|
assert(mr->ram_addr != RAM_ADDR_INVALID);
|
|
cpu_physical_memory_test_and_clear_dirty(mr->ram_addr + addr, size,
|
|
client);
|
|
}
|
|
|
|
int memory_region_get_fd(MemoryRegion *mr)
|
|
{
|
|
if (mr->alias) {
|
|
return memory_region_get_fd(mr->alias);
|
|
}
|
|
|
|
assert(mr->ram_addr != RAM_ADDR_INVALID);
|
|
|
|
return qemu_get_ram_fd(mr->ram_addr & TARGET_PAGE_MASK);
|
|
}
|
|
|
|
void *memory_region_get_ram_ptr(MemoryRegion *mr)
|
|
{
|
|
void *ptr;
|
|
uint64_t offset = 0;
|
|
|
|
rcu_read_lock();
|
|
while (mr->alias) {
|
|
offset += mr->alias_offset;
|
|
mr = mr->alias;
|
|
}
|
|
assert(mr->ram_addr != RAM_ADDR_INVALID);
|
|
ptr = qemu_get_ram_ptr(mr->ram_addr & TARGET_PAGE_MASK);
|
|
rcu_read_unlock();
|
|
|
|
return ptr + offset;
|
|
}
|
|
|
|
void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, Error **errp)
|
|
{
|
|
assert(mr->ram_addr != RAM_ADDR_INVALID);
|
|
|
|
qemu_ram_resize(mr->ram_addr, newsize, errp);
|
|
}
|
|
|
|
static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
CoalescedMemoryRange *cmr;
|
|
AddrRange tmp;
|
|
MemoryRegionSection section;
|
|
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
if (fr->mr == mr) {
|
|
section = (MemoryRegionSection) {
|
|
.address_space = as,
|
|
.offset_within_address_space = int128_get64(fr->addr.start),
|
|
.size = fr->addr.size,
|
|
};
|
|
|
|
MEMORY_LISTENER_CALL(coalesced_mmio_del, Reverse, §ion,
|
|
int128_get64(fr->addr.start),
|
|
int128_get64(fr->addr.size));
|
|
QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
|
|
tmp = addrrange_shift(cmr->addr,
|
|
int128_sub(fr->addr.start,
|
|
int128_make64(fr->offset_in_region)));
|
|
if (!addrrange_intersects(tmp, fr->addr)) {
|
|
continue;
|
|
}
|
|
tmp = addrrange_intersection(tmp, fr->addr);
|
|
MEMORY_LISTENER_CALL(coalesced_mmio_add, Forward, §ion,
|
|
int128_get64(tmp.start),
|
|
int128_get64(tmp.size));
|
|
}
|
|
}
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
|
|
static void memory_region_update_coalesced_range(MemoryRegion *mr)
|
|
{
|
|
AddressSpace *as;
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
memory_region_update_coalesced_range_as(mr, as);
|
|
}
|
|
}
|
|
|
|
void memory_region_set_coalescing(MemoryRegion *mr)
|
|
{
|
|
memory_region_clear_coalescing(mr);
|
|
memory_region_add_coalescing(mr, 0, int128_get64(mr->size));
|
|
}
|
|
|
|
void memory_region_add_coalescing(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
uint64_t size)
|
|
{
|
|
CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr));
|
|
|
|
cmr->addr = addrrange_make(int128_make64(offset), int128_make64(size));
|
|
QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link);
|
|
memory_region_update_coalesced_range(mr);
|
|
memory_region_set_flush_coalesced(mr);
|
|
}
|
|
|
|
void memory_region_clear_coalescing(MemoryRegion *mr)
|
|
{
|
|
CoalescedMemoryRange *cmr;
|
|
bool updated = false;
|
|
|
|
qemu_flush_coalesced_mmio_buffer();
|
|
mr->flush_coalesced_mmio = false;
|
|
|
|
while (!QTAILQ_EMPTY(&mr->coalesced)) {
|
|
cmr = QTAILQ_FIRST(&mr->coalesced);
|
|
QTAILQ_REMOVE(&mr->coalesced, cmr, link);
|
|
g_free(cmr);
|
|
updated = true;
|
|
}
|
|
|
|
if (updated) {
|
|
memory_region_update_coalesced_range(mr);
|
|
}
|
|
}
|
|
|
|
void memory_region_set_flush_coalesced(MemoryRegion *mr)
|
|
{
|
|
mr->flush_coalesced_mmio = true;
|
|
}
|
|
|
|
void memory_region_clear_flush_coalesced(MemoryRegion *mr)
|
|
{
|
|
qemu_flush_coalesced_mmio_buffer();
|
|
if (QTAILQ_EMPTY(&mr->coalesced)) {
|
|
mr->flush_coalesced_mmio = false;
|
|
}
|
|
}
|
|
|
|
void memory_region_set_global_locking(MemoryRegion *mr)
|
|
{
|
|
mr->global_locking = true;
|
|
}
|
|
|
|
void memory_region_clear_global_locking(MemoryRegion *mr)
|
|
{
|
|
mr->global_locking = false;
|
|
}
|
|
|
|
static bool userspace_eventfd_warning;
|
|
|
|
void memory_region_add_eventfd(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size,
|
|
bool match_data,
|
|
uint64_t data,
|
|
EventNotifier *e)
|
|
{
|
|
MemoryRegionIoeventfd mrfd = {
|
|
.addr.start = int128_make64(addr),
|
|
.addr.size = int128_make64(size),
|
|
.match_data = match_data,
|
|
.data = data,
|
|
.e = e,
|
|
};
|
|
unsigned i;
|
|
|
|
if (kvm_enabled() && (!(kvm_eventfds_enabled() ||
|
|
userspace_eventfd_warning))) {
|
|
userspace_eventfd_warning = true;
|
|
error_report("Using eventfd without MMIO binding in KVM. "
|
|
"Suboptimal performance expected");
|
|
}
|
|
|
|
if (size) {
|
|
adjust_endianness(mr, &mrfd.data, size);
|
|
}
|
|
memory_region_transaction_begin();
|
|
for (i = 0; i < mr->ioeventfd_nb; ++i) {
|
|
if (memory_region_ioeventfd_before(mrfd, mr->ioeventfds[i])) {
|
|
break;
|
|
}
|
|
}
|
|
++mr->ioeventfd_nb;
|
|
mr->ioeventfds = g_realloc(mr->ioeventfds,
|
|
sizeof(*mr->ioeventfds) * mr->ioeventfd_nb);
|
|
memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i],
|
|
sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
|
|
mr->ioeventfds[i] = mrfd;
|
|
ioeventfd_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_del_eventfd(MemoryRegion *mr,
|
|
hwaddr addr,
|
|
unsigned size,
|
|
bool match_data,
|
|
uint64_t data,
|
|
EventNotifier *e)
|
|
{
|
|
MemoryRegionIoeventfd mrfd = {
|
|
.addr.start = int128_make64(addr),
|
|
.addr.size = int128_make64(size),
|
|
.match_data = match_data,
|
|
.data = data,
|
|
.e = e,
|
|
};
|
|
unsigned i;
|
|
|
|
if (size) {
|
|
adjust_endianness(mr, &mrfd.data, size);
|
|
}
|
|
memory_region_transaction_begin();
|
|
for (i = 0; i < mr->ioeventfd_nb; ++i) {
|
|
if (memory_region_ioeventfd_equal(mrfd, mr->ioeventfds[i])) {
|
|
break;
|
|
}
|
|
}
|
|
assert(i != mr->ioeventfd_nb);
|
|
memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1],
|
|
sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1)));
|
|
--mr->ioeventfd_nb;
|
|
mr->ioeventfds = g_realloc(mr->ioeventfds,
|
|
sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1);
|
|
ioeventfd_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
static void memory_region_update_container_subregions(MemoryRegion *subregion)
|
|
{
|
|
hwaddr offset = subregion->addr;
|
|
MemoryRegion *mr = subregion->container;
|
|
MemoryRegion *other;
|
|
|
|
memory_region_transaction_begin();
|
|
|
|
memory_region_ref(subregion);
|
|
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
|
|
if (subregion->may_overlap || other->may_overlap) {
|
|
continue;
|
|
}
|
|
if (int128_ge(int128_make64(offset),
|
|
int128_add(int128_make64(other->addr), other->size))
|
|
|| int128_le(int128_add(int128_make64(offset), subregion->size),
|
|
int128_make64(other->addr))) {
|
|
continue;
|
|
}
|
|
#if 0
|
|
printf("warning: subregion collision %llx/%llx (%s) "
|
|
"vs %llx/%llx (%s)\n",
|
|
(unsigned long long)offset,
|
|
(unsigned long long)int128_get64(subregion->size),
|
|
subregion->name,
|
|
(unsigned long long)other->addr,
|
|
(unsigned long long)int128_get64(other->size),
|
|
other->name);
|
|
#endif
|
|
}
|
|
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
|
|
if (subregion->priority >= other->priority) {
|
|
QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
|
|
goto done;
|
|
}
|
|
}
|
|
QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
|
|
done:
|
|
memory_region_update_pending |= mr->enabled && subregion->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
static void memory_region_add_subregion_common(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion)
|
|
{
|
|
assert(!subregion->container);
|
|
subregion->container = mr;
|
|
subregion->addr = offset;
|
|
memory_region_update_container_subregions(subregion);
|
|
}
|
|
|
|
void memory_region_add_subregion(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion)
|
|
{
|
|
subregion->may_overlap = false;
|
|
subregion->priority = 0;
|
|
memory_region_add_subregion_common(mr, offset, subregion);
|
|
}
|
|
|
|
void memory_region_add_subregion_overlap(MemoryRegion *mr,
|
|
hwaddr offset,
|
|
MemoryRegion *subregion,
|
|
int priority)
|
|
{
|
|
subregion->may_overlap = true;
|
|
subregion->priority = priority;
|
|
memory_region_add_subregion_common(mr, offset, subregion);
|
|
}
|
|
|
|
void memory_region_del_subregion(MemoryRegion *mr,
|
|
MemoryRegion *subregion)
|
|
{
|
|
memory_region_transaction_begin();
|
|
assert(subregion->container == mr);
|
|
subregion->container = NULL;
|
|
QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
|
|
memory_region_unref(subregion);
|
|
memory_region_update_pending |= mr->enabled && subregion->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
|
|
{
|
|
if (enabled == mr->enabled) {
|
|
return;
|
|
}
|
|
memory_region_transaction_begin();
|
|
mr->enabled = enabled;
|
|
memory_region_update_pending = true;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_region_set_size(MemoryRegion *mr, uint64_t size)
|
|
{
|
|
Int128 s = int128_make64(size);
|
|
|
|
if (size == UINT64_MAX) {
|
|
s = int128_2_64();
|
|
}
|
|
if (int128_eq(s, mr->size)) {
|
|
return;
|
|
}
|
|
memory_region_transaction_begin();
|
|
mr->size = s;
|
|
memory_region_update_pending = true;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
static void memory_region_readd_subregion(MemoryRegion *mr)
|
|
{
|
|
MemoryRegion *container = mr->container;
|
|
|
|
if (container) {
|
|
memory_region_transaction_begin();
|
|
memory_region_ref(mr);
|
|
memory_region_del_subregion(container, mr);
|
|
mr->container = container;
|
|
memory_region_update_container_subregions(mr);
|
|
memory_region_unref(mr);
|
|
memory_region_transaction_commit();
|
|
}
|
|
}
|
|
|
|
void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
|
|
{
|
|
if (addr != mr->addr) {
|
|
mr->addr = addr;
|
|
memory_region_readd_subregion(mr);
|
|
}
|
|
}
|
|
|
|
void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
|
|
{
|
|
assert(mr->alias);
|
|
|
|
if (offset == mr->alias_offset) {
|
|
return;
|
|
}
|
|
|
|
memory_region_transaction_begin();
|
|
mr->alias_offset = offset;
|
|
memory_region_update_pending |= mr->enabled;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
uint64_t memory_region_get_alignment(const MemoryRegion *mr)
|
|
{
|
|
return mr->align;
|
|
}
|
|
|
|
static int cmp_flatrange_addr(const void *addr_, const void *fr_)
|
|
{
|
|
const AddrRange *addr = addr_;
|
|
const FlatRange *fr = fr_;
|
|
|
|
if (int128_le(addrrange_end(*addr), fr->addr.start)) {
|
|
return -1;
|
|
} else if (int128_ge(addr->start, addrrange_end(fr->addr))) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static FlatRange *flatview_lookup(FlatView *view, AddrRange addr)
|
|
{
|
|
return bsearch(&addr, view->ranges, view->nr,
|
|
sizeof(FlatRange), cmp_flatrange_addr);
|
|
}
|
|
|
|
bool memory_region_is_mapped(MemoryRegion *mr)
|
|
{
|
|
return mr->container ? true : false;
|
|
}
|
|
|
|
/* Same as memory_region_find, but it does not add a reference to the
|
|
* returned region. It must be called from an RCU critical section.
|
|
*/
|
|
static MemoryRegionSection memory_region_find_rcu(MemoryRegion *mr,
|
|
hwaddr addr, uint64_t size)
|
|
{
|
|
MemoryRegionSection ret = { .mr = NULL };
|
|
MemoryRegion *root;
|
|
AddressSpace *as;
|
|
AddrRange range;
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
addr += mr->addr;
|
|
for (root = mr; root->container; ) {
|
|
root = root->container;
|
|
addr += root->addr;
|
|
}
|
|
|
|
as = memory_region_to_address_space(root);
|
|
if (!as) {
|
|
return ret;
|
|
}
|
|
range = addrrange_make(int128_make64(addr), int128_make64(size));
|
|
|
|
view = atomic_rcu_read(&as->current_map);
|
|
fr = flatview_lookup(view, range);
|
|
if (!fr) {
|
|
return ret;
|
|
}
|
|
|
|
while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
|
|
--fr;
|
|
}
|
|
|
|
ret.mr = fr->mr;
|
|
ret.address_space = as;
|
|
range = addrrange_intersection(range, fr->addr);
|
|
ret.offset_within_region = fr->offset_in_region;
|
|
ret.offset_within_region += int128_get64(int128_sub(range.start,
|
|
fr->addr.start));
|
|
ret.size = range.size;
|
|
ret.offset_within_address_space = int128_get64(range.start);
|
|
ret.readonly = fr->readonly;
|
|
return ret;
|
|
}
|
|
|
|
MemoryRegionSection memory_region_find(MemoryRegion *mr,
|
|
hwaddr addr, uint64_t size)
|
|
{
|
|
MemoryRegionSection ret;
|
|
rcu_read_lock();
|
|
ret = memory_region_find_rcu(mr, addr, size);
|
|
if (ret.mr) {
|
|
memory_region_ref(ret.mr);
|
|
}
|
|
rcu_read_unlock();
|
|
return ret;
|
|
}
|
|
|
|
bool memory_region_present(MemoryRegion *container, hwaddr addr)
|
|
{
|
|
MemoryRegion *mr;
|
|
|
|
rcu_read_lock();
|
|
mr = memory_region_find_rcu(container, addr, 1).mr;
|
|
rcu_read_unlock();
|
|
return mr && mr != container;
|
|
}
|
|
|
|
void address_space_sync_dirty_bitmap(AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync);
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
|
|
void memory_global_dirty_log_start(void)
|
|
{
|
|
global_dirty_log = true;
|
|
|
|
MEMORY_LISTENER_CALL_GLOBAL(log_global_start, Forward);
|
|
|
|
/* Refresh DIRTY_LOG_MIGRATION bit. */
|
|
memory_region_transaction_begin();
|
|
memory_region_update_pending = true;
|
|
memory_region_transaction_commit();
|
|
}
|
|
|
|
void memory_global_dirty_log_stop(void)
|
|
{
|
|
global_dirty_log = false;
|
|
|
|
/* Refresh DIRTY_LOG_MIGRATION bit. */
|
|
memory_region_transaction_begin();
|
|
memory_region_update_pending = true;
|
|
memory_region_transaction_commit();
|
|
|
|
MEMORY_LISTENER_CALL_GLOBAL(log_global_stop, Reverse);
|
|
}
|
|
|
|
static void listener_add_address_space(MemoryListener *listener,
|
|
AddressSpace *as)
|
|
{
|
|
FlatView *view;
|
|
FlatRange *fr;
|
|
|
|
if (listener->address_space_filter
|
|
&& listener->address_space_filter != as) {
|
|
return;
|
|
}
|
|
|
|
if (listener->begin) {
|
|
listener->begin(listener);
|
|
}
|
|
if (global_dirty_log) {
|
|
if (listener->log_global_start) {
|
|
listener->log_global_start(listener);
|
|
}
|
|
}
|
|
|
|
view = address_space_get_flatview(as);
|
|
FOR_EACH_FLAT_RANGE(fr, view) {
|
|
MemoryRegionSection section = {
|
|
.mr = fr->mr,
|
|
.address_space = as,
|
|
.offset_within_region = fr->offset_in_region,
|
|
.size = fr->addr.size,
|
|
.offset_within_address_space = int128_get64(fr->addr.start),
|
|
.readonly = fr->readonly,
|
|
};
|
|
if (fr->dirty_log_mask && listener->log_start) {
|
|
listener->log_start(listener, §ion, 0, fr->dirty_log_mask);
|
|
}
|
|
if (listener->region_add) {
|
|
listener->region_add(listener, §ion);
|
|
}
|
|
}
|
|
if (listener->commit) {
|
|
listener->commit(listener);
|
|
}
|
|
flatview_unref(view);
|
|
}
|
|
|
|
void memory_listener_register(MemoryListener *listener, AddressSpace *filter)
|
|
{
|
|
MemoryListener *other = NULL;
|
|
AddressSpace *as;
|
|
|
|
listener->address_space_filter = filter;
|
|
if (QTAILQ_EMPTY(&memory_listeners)
|
|
|| listener->priority >= QTAILQ_LAST(&memory_listeners,
|
|
memory_listeners)->priority) {
|
|
QTAILQ_INSERT_TAIL(&memory_listeners, listener, link);
|
|
} else {
|
|
QTAILQ_FOREACH(other, &memory_listeners, link) {
|
|
if (listener->priority < other->priority) {
|
|
break;
|
|
}
|
|
}
|
|
QTAILQ_INSERT_BEFORE(other, listener, link);
|
|
}
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
listener_add_address_space(listener, as);
|
|
}
|
|
}
|
|
|
|
void memory_listener_unregister(MemoryListener *listener)
|
|
{
|
|
QTAILQ_REMOVE(&memory_listeners, listener, link);
|
|
}
|
|
|
|
void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name)
|
|
{
|
|
memory_region_ref(root);
|
|
memory_region_transaction_begin();
|
|
as->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();
|
|
}
|
|
|
|
static void do_address_space_destroy(AddressSpace *as)
|
|
{
|
|
MemoryListener *listener;
|
|
|
|
address_space_destroy_dispatch(as);
|
|
|
|
QTAILQ_FOREACH(listener, &memory_listeners, link) {
|
|
assert(listener->address_space_filter != as);
|
|
}
|
|
|
|
flatview_unref(as->current_map);
|
|
g_free(as->name);
|
|
g_free(as->ioeventfds);
|
|
memory_region_unref(as->root);
|
|
}
|
|
|
|
void address_space_destroy(AddressSpace *as)
|
|
{
|
|
MemoryRegion *root = as->root;
|
|
|
|
/* Flush out anything from MemoryListeners listening in on this */
|
|
memory_region_transaction_begin();
|
|
as->root = NULL;
|
|
memory_region_transaction_commit();
|
|
QTAILQ_REMOVE(&address_spaces, as, address_spaces_link);
|
|
address_space_unregister(as);
|
|
|
|
/* At this point, as->dispatch and as->current_map are dummy
|
|
* entries that the guest should never use. Wait for the old
|
|
* values to expire before freeing the data.
|
|
*/
|
|
as->root = root;
|
|
call_rcu(as, do_address_space_destroy, rcu);
|
|
}
|
|
|
|
typedef struct MemoryRegionList MemoryRegionList;
|
|
|
|
struct MemoryRegionList {
|
|
const MemoryRegion *mr;
|
|
QTAILQ_ENTRY(MemoryRegionList) queue;
|
|
};
|
|
|
|
typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead;
|
|
|
|
static void mtree_print_mr(fprintf_function mon_printf, void *f,
|
|
const MemoryRegion *mr, unsigned int level,
|
|
hwaddr base,
|
|
MemoryRegionListHead *alias_print_queue)
|
|
{
|
|
MemoryRegionList *new_ml, *ml, *next_ml;
|
|
MemoryRegionListHead submr_print_queue;
|
|
const MemoryRegion *submr;
|
|
unsigned int i;
|
|
|
|
if (!mr) {
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < level; i++) {
|
|
mon_printf(f, " ");
|
|
}
|
|
|
|
if (mr->alias) {
|
|
MemoryRegionList *ml;
|
|
bool found = false;
|
|
|
|
/* check if the alias is already in the queue */
|
|
QTAILQ_FOREACH(ml, alias_print_queue, queue) {
|
|
if (ml->mr == mr->alias) {
|
|
found = true;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
ml = g_new(MemoryRegionList, 1);
|
|
ml->mr = mr->alias;
|
|
QTAILQ_INSERT_TAIL(alias_print_queue, ml, queue);
|
|
}
|
|
mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx
|
|
" (prio %d, %c%c): alias %s @%s " TARGET_FMT_plx
|
|
"-" TARGET_FMT_plx "%s\n",
|
|
base + mr->addr,
|
|
base + mr->addr
|
|
+ (int128_nz(mr->size) ?
|
|
(hwaddr)int128_get64(int128_sub(mr->size,
|
|
int128_one())) : 0),
|
|
mr->priority,
|
|
mr->romd_mode ? 'R' : '-',
|
|
!mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W'
|
|
: '-',
|
|
memory_region_name(mr),
|
|
memory_region_name(mr->alias),
|
|
mr->alias_offset,
|
|
mr->alias_offset
|
|
+ (int128_nz(mr->size) ?
|
|
(hwaddr)int128_get64(int128_sub(mr->size,
|
|
int128_one())) : 0),
|
|
mr->enabled ? "" : " [disabled]");
|
|
} else {
|
|
mon_printf(f,
|
|
TARGET_FMT_plx "-" TARGET_FMT_plx " (prio %d, %c%c): %s%s\n",
|
|
base + mr->addr,
|
|
base + mr->addr
|
|
+ (int128_nz(mr->size) ?
|
|
(hwaddr)int128_get64(int128_sub(mr->size,
|
|
int128_one())) : 0),
|
|
mr->priority,
|
|
mr->romd_mode ? 'R' : '-',
|
|
!mr->readonly && !(mr->rom_device && mr->romd_mode) ? 'W'
|
|
: '-',
|
|
memory_region_name(mr),
|
|
mr->enabled ? "" : " [disabled]");
|
|
}
|
|
|
|
QTAILQ_INIT(&submr_print_queue);
|
|
|
|
QTAILQ_FOREACH(submr, &mr->subregions, subregions_link) {
|
|
new_ml = g_new(MemoryRegionList, 1);
|
|
new_ml->mr = submr;
|
|
QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
|
|
if (new_ml->mr->addr < ml->mr->addr ||
|
|
(new_ml->mr->addr == ml->mr->addr &&
|
|
new_ml->mr->priority > ml->mr->priority)) {
|
|
QTAILQ_INSERT_BEFORE(ml, new_ml, queue);
|
|
new_ml = NULL;
|
|
break;
|
|
}
|
|
}
|
|
if (new_ml) {
|
|
QTAILQ_INSERT_TAIL(&submr_print_queue, new_ml, queue);
|
|
}
|
|
}
|
|
|
|
QTAILQ_FOREACH(ml, &submr_print_queue, queue) {
|
|
mtree_print_mr(mon_printf, f, ml->mr, level + 1, base + mr->addr,
|
|
alias_print_queue);
|
|
}
|
|
|
|
QTAILQ_FOREACH_SAFE(ml, &submr_print_queue, queue, next_ml) {
|
|
g_free(ml);
|
|
}
|
|
}
|
|
|
|
void mtree_info(fprintf_function mon_printf, void *f)
|
|
{
|
|
MemoryRegionListHead ml_head;
|
|
MemoryRegionList *ml, *ml2;
|
|
AddressSpace *as;
|
|
|
|
QTAILQ_INIT(&ml_head);
|
|
|
|
QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
|
|
mon_printf(f, "address-space: %s\n", as->name);
|
|
mtree_print_mr(mon_printf, f, as->root, 1, 0, &ml_head);
|
|
mon_printf(f, "\n");
|
|
}
|
|
|
|
/* print aliased regions */
|
|
QTAILQ_FOREACH(ml, &ml_head, queue) {
|
|
mon_printf(f, "memory-region: %s\n", memory_region_name(ml->mr));
|
|
mtree_print_mr(mon_printf, f, ml->mr, 1, 0, &ml_head);
|
|
mon_printf(f, "\n");
|
|
}
|
|
|
|
QTAILQ_FOREACH_SAFE(ml, &ml_head, queue, ml2) {
|
|
g_free(ml);
|
|
}
|
|
}
|
|
|
|
static const TypeInfo memory_region_info = {
|
|
.parent = TYPE_OBJECT,
|
|
.name = TYPE_MEMORY_REGION,
|
|
.instance_size = sizeof(MemoryRegion),
|
|
.instance_init = memory_region_initfn,
|
|
.instance_finalize = memory_region_finalize,
|
|
};
|
|
|
|
static void memory_register_types(void)
|
|
{
|
|
type_register_static(&memory_region_info);
|
|
}
|
|
|
|
type_init(memory_register_types)
|