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unicorn/qemu/memory.c
Beata Michalska 0716794d86 Memory: Enable writeback for given memory region 
Add an option to trigger memory writeback to sync given memory region
with the corresponding backing store, case one is available.
This extends the support for persistent memory, allowing syncing on-demand.

Backports commit 61c490e25e081af39ff40556f6c1229b8b011585 from qemu
2020-01-14 07:44:24 -05:00

2066 lines
63 KiB
C
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/*
* 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.
*/
/* Modified for Unicorn Engine by Nguyen Anh Quynh, 2015 */
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#include "qapi/error.h"
#include "exec/exec-all.h"
#include "exec/memory.h"
#include "exec/address-spaces.h"
#include "exec/ioport.h"
#include "qapi/visitor.h"
#include "qemu/bitops.h"
#include "qom/object.h"
#include "exec/memory-internal.h"
#include "exec/ram_addr.h"
#include "sysemu/sysemu.h"
//#define DEBUG_UNASSIGNED
#define RAM_ADDR_INVALID (~(ram_addr_t)0)
// Unicorn engine
MemoryRegion *memory_map(struct uc_struct *uc, hwaddr begin, size_t size, uint32_t perms)
{
MemoryRegion *ram = g_new(MemoryRegion, 1);
memory_region_init_ram_nomigrate(uc, ram, NULL, "pc.ram", size, perms, &error_abort);
if (ram->ram_block == NULL) {
// out of memory
return NULL;
}
memory_region_add_subregion(get_system_memory(uc), begin, ram);
if (uc->current_cpu)
tlb_flush(uc->current_cpu);
return ram;
}
MemoryRegion *memory_map_ptr(struct uc_struct *uc, hwaddr begin, size_t size, uint32_t perms, void *ptr)
{
MemoryRegion *ram = g_new(MemoryRegion, 1);
memory_region_init_ram_ptr(uc, ram, NULL, "pc.ram", size, ptr);
ram->perms = perms;
if (ram->ram_block == NULL) {
// out of memory
return NULL;
}
memory_region_add_subregion(get_system_memory(uc), begin, ram);
if (uc->current_cpu)
tlb_flush(uc->current_cpu);
return ram;
}
static void memory_region_update_container_subregions(MemoryRegion *subregion);
static void unicorn_free_memory_region(MemoryRegion *mr) {
mr->destructor(mr);
mr->ram_block = NULL;
g_free((char *)mr->name);
mr->name = NULL;
Object *obj = OBJECT(mr);
obj->ref = 1;
obj->free = g_free;
object_property_del_child(mr->uc, qdev_get_machine(mr->uc), obj, &error_abort);
}
void memory_unmap(struct uc_struct *uc, MemoryRegion *mr)
{
// Make sure all pages associated with the MemoryRegion are flushed
// Only need to do this if we are in a running state
if (uc->current_cpu) {
for (hwaddr addr = mr->addr; addr < mr->end; addr += uc->target_page_size) {
tlb_flush_page(uc->current_cpu, (target_ulong)addr);
}
}
memory_region_del_subregion(get_system_memory(uc), mr);
for (size_t i = 0; i < uc->mapped_block_count; i++) {
if (uc->mapped_blocks[i] == mr) {
uc->mapped_block_count--;
//shift remainder of array down over deleted pointer
memmove(&uc->mapped_blocks[i], &uc->mapped_blocks[i + 1], sizeof(MemoryRegion*) * (uc->mapped_block_count - i));
unicorn_free_memory_region(mr);
break;
}
}
}
int memory_free(struct uc_struct *uc)
{
for (size_t i = 0; i < uc->mapped_block_count; i++) {
MemoryRegion *mr = uc->mapped_blocks[i];
mr->enabled = false;
memory_region_del_subregion(get_system_memory(uc), mr);
unicorn_free_memory_region(mr);
}
return 0;
}
static void memory_init(struct uc_struct *uc)
{
}
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)
{
AddrRange ar;
ar.start = start;
ar.size = size;
return ar;
}
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 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 };
#define MEMORY_LISTENER_CALL_GLOBAL(_callback, _direction, ...) \
do { \
MemoryListener *_listener; \
\
switch (_direction) { \
case Forward: \
QTAILQ_FOREACH(_listener, &uc->memory_listeners, link) { \
if (_listener->_callback) { \
_listener->_callback(_listener, ##__VA_ARGS__); \
} \
} \
break; \
case Reverse: \
QTAILQ_FOREACH_REVERSE(_listener, &uc->memory_listeners, \
memory_listeners, link) { \
if (_listener->_callback) { \
_listener->_callback(_listener, ##__VA_ARGS__); \
} \
} \
break; \
default: \
abort(); \
} \
} while (0)
#define MEMORY_LISTENER_CALL(_as, _callback, _direction, _section, ...) \
do { \
MemoryListener *_listener; \
struct memory_listeners_as *list = &(_as)->listeners; \
\
switch (_direction) { \
case Forward: \
QTAILQ_FOREACH(_listener, list, link_as) { \
if (_listener->_callback) { \
_listener->_callback(_listener, _section, ##__VA_ARGS__); \
} \
} \
break; \
case Reverse: \
QTAILQ_FOREACH_REVERSE(_listener, list, memory_listeners_as, \
link_as) { \
if (_listener->_callback) { \
_listener->_callback(_listener, _section, ##__VA_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, ...) \
do { \
MemoryRegionSection mrs = section_from_flat_range(fr, \
address_space_to_flatview(as)); \
MEMORY_LISTENER_CALL(as, callback, dir, &mrs, ##__VA_ARGS__); \
} while(0);
typedef struct FlatRange FlatRange;
/* 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 readonly;
bool nonvolatile;
};
/* Flattened global view of current active memory hierarchy. Kept in sorted
* order.
*/
struct FlatView {
unsigned ref;
FlatRange *ranges;
unsigned nr;
unsigned nr_allocated;
struct AddressSpaceDispatch *dispatch;
MemoryRegion *root;
};
typedef struct AddressSpaceOps AddressSpaceOps;
#define FOR_EACH_FLAT_RANGE(var, view) \
for (var = (view)->ranges; var < (view)->ranges + (view)->nr; ++var)
static inline MemoryRegionSection
section_from_flat_range(FlatRange *fr, FlatView *fv)
{
MemoryRegionSection s = {0};
s.mr = fr->mr;
s.fv = fv;
s.offset_within_region = fr->offset_in_region;
s.size = fr->addr.size;
s.offset_within_address_space = int128_get64(fr->addr.start);
s.readonly = fr->readonly;
s.nonvolatile = fr->nonvolatile;
return s;
}
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->readonly == b->readonly
&& a->nonvolatile == b->nonvolatile;
}
static FlatView *flatview_new(MemoryRegion *mr_root)
{
FlatView *view;
view = g_new0(FlatView, 1);
view->ref = 1;
view->root = mr_root;
memory_region_ref(mr_root);
return view;
}
/* 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;
if (view->dispatch) {
address_space_dispatch_free(view->dispatch);
}
for (i = 0; i < view->nr; i++) {
memory_region_unref(view->ranges[i].mr);
}
g_free(view->ranges);
memory_region_unref(view->root);
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);
}
}
void unicorn_free_empty_flat_view(struct uc_struct *uc)
{
if (!uc->empty_view) {
return;
}
flatview_destroy(uc->empty_view);
}
FlatView *address_space_to_flatview(AddressSpace *as)
{
// Unicorn: atomic_read used instead of atomic_rcu_read
return atomic_read(&as->current_map);
}
AddressSpaceDispatch *flatview_to_dispatch(FlatView *fv)
{
return fv->dispatch;
}
AddressSpaceDispatch *address_space_to_dispatch(AddressSpace *as)
{
return flatview_to_dispatch(address_space_to_flatview(as));
}
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->readonly == r2->readonly
&& r1->nonvolatile == r2->nonvolatile;
}
/* Attempt to simplify a view by merging adjacent ranges */
static void flatview_simplify(FlatView *view)
{
unsigned i, j, k;
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;
for (k = i; k < j; k++) {
memory_region_unref(view->ranges[k].mr);
}
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 void adjust_endianness(MemoryRegion *mr, uint64_t *data, MemOp op)
{
if ((op & MO_BSWAP) != devend_memop(mr->ops->endianness)) {
switch (op & MO_SIZE) {
case MO_8:
break;
case MO_16:
*data = bswap16(*data);
break;
case MO_32:
*data = bswap32(*data);
break;
case MO_64:
*data = bswap64(*data);
break;
default:
g_assert_not_reached();
}
}
}
static inline void memory_region_shift_read_access(uint64_t *value,
signed shift,
uint64_t mask,
uint64_t tmp)
{
if (shift >= 0) {
*value |= (tmp & mask) << shift;
} else {
*value |= (tmp & mask) >> -shift;
}
}
static inline uint64_t memory_region_shift_write_access(uint64_t *value,
signed shift,
uint64_t mask)
{
uint64_t tmp;
if (shift >= 0) {
tmp = (*value >> shift) & mask;
} else {
tmp = (*value << -shift) & mask;
}
return tmp;
}
static MemTxResult memory_region_read_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
signed shift,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp;
// UNICORN: Commented out
//if (mr->flush_coalesced_mmio) {
// qemu_flush_coalesced_mmio_buffer();
//}
tmp = mr->ops->read(mr->uc, mr->opaque, addr, size);
memory_region_shift_read_access(value, shift, mask, tmp);
return MEMTX_OK;
}
static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
signed shift,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp = 0;
MemTxResult r;
// UNICORN: commented out
//if (mr->flush_coalesced_mmio) {
// qemu_flush_coalesced_mmio_buffer();
//}
r = mr->ops->read_with_attrs(mr->uc, mr->opaque, addr, &tmp, size, attrs);
// UNICORN: Commented out
//trace_memory_region_ops_read(mr, addr, tmp, size);
memory_region_shift_read_access(value, shift, mask, tmp);
return r;
}
static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
signed shift,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
mr->ops->write(mr->uc, 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,
signed shift,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
// UNICORN: Commented out
//if (mr->flush_coalesced_mmio) {
// qemu_flush_coalesced_mmio_buffer();
//}
//trace_memory_region_ops_write(mr, addr, tmp, size);
return mr->ops->write_with_attrs(mr->uc, 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_fn)
(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
unsigned size,
signed 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 = MAKE_64BIT_MASK(0, access_size * 8);
if (memory_region_big_endian(mr)) {
for (i = 0; i < size; i += access_size) {
r |= access_fn(mr, addr + i, value, access_size,
(size - access_size - i) * 8, access_mask, attrs);
}
} else {
for (i = 0; i < size; i += access_size) {
r |= access_fn(mr, addr + i, value, access_size, i * 8,
access_mask, attrs);
}
}
return r;
}
static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
{
AddressSpace *as;
while (mr->container) {
mr = mr->container;
}
QTAILQ_FOREACH(as, &mr->uc->address_spaces, address_spaces_link) {
if (mr == as->root) {
return as;
}
}
return NULL;
}
/* Render a memory region into the global view. Ranges in @view obscure
* ranges in @mr.
*/
static void render_memory_region(FlatView *view,
MemoryRegion *mr,
Int128 base,
AddrRange clip,
bool readonly,
bool nonvolatile)
{
MemoryRegion *subregion;
unsigned i;
hwaddr offset_in_region;
Int128 remain;
Int128 now;
FlatRange fr;
AddrRange tmp;
if (!mr->enabled) {
return;
}
int128_addto(&base, int128_make64(mr->addr));
readonly |= mr->readonly;
nonvolatile |= mr->nonvolatile;
tmp = addrrange_make(base, mr->size);
if (!addrrange_intersects(tmp, clip)) {
return;
}
clip = addrrange_intersection(tmp, clip);
if (mr->alias) {
int128_subfrom(&base, int128_make64(mr->alias->addr));
int128_subfrom(&base, int128_make64(mr->alias_offset));
render_memory_region(view, mr->alias, base, clip,
readonly, nonvolatile);
return;
}
/* Render subregions in priority order. */
QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
render_memory_region(view, subregion, base, clip,
readonly, nonvolatile);
}
if (!mr->terminates) {
return;
}
offset_in_region = int128_get64(int128_sub(clip.start, base));
base = clip.start;
remain = clip.size;
fr.mr = mr;
fr.dirty_log_mask = mr->dirty_log_mask;
fr.readonly = readonly;
fr.nonvolatile = nonvolatile;
/* Render the region itself into any gaps left by the current view. */
for (i = 0; i < view->nr && int128_nz(remain); ++i) {
if (int128_ge(base, addrrange_end(view->ranges[i].addr))) {
continue;
}
if (int128_lt(base, view->ranges[i].addr.start)) {
now = int128_min(remain,
int128_sub(view->ranges[i].addr.start, base));
fr.offset_in_region = offset_in_region;
fr.addr = addrrange_make(base, now);
flatview_insert(view, i, &fr);
++i;
int128_addto(&base, now);
offset_in_region += int128_get64(now);
int128_subfrom(&remain, now);
}
now = int128_sub(int128_min(int128_add(base, remain),
addrrange_end(view->ranges[i].addr)),
base);
int128_addto(&base, now);
offset_in_region += int128_get64(now);
int128_subfrom(&remain, now);
}
if (int128_nz(remain)) {
fr.offset_in_region = offset_in_region;
fr.addr = addrrange_make(base, remain);
flatview_insert(view, i, &fr);
}
}
static MemoryRegion *memory_region_get_flatview_root(MemoryRegion *mr)
{
while (mr->enabled) {
if (mr->alias) {
if (!mr->alias_offset && int128_ge(mr->size, mr->alias->size)) {
/* The alias is included in its entirety. Use it as
* the "real" root, so that we can share more FlatViews.
*/
mr = mr->alias;
continue;
}
} else if (!mr->terminates) {
unsigned int found = 0;
MemoryRegion *child, *next = NULL;
QTAILQ_FOREACH(child, &mr->subregions, subregions_link) {
if (child->enabled) {
if (++found > 1) {
next = NULL;
break;
}
if (!child->addr && int128_ge(mr->size, child->size)) {
/* A child is included in its entirety. If it's the only
* enabled one, use it in the hope of finding an alias down the
* way. This will also let us share FlatViews.
*/
next = child;
}
}
}
if (next) {
mr = next;
continue;
}
}
break;
}
return mr;
}
/* Render a memory topology into a list of disjoint absolute ranges. */
static FlatView *generate_memory_topology(struct uc_struct *uc, MemoryRegion *mr)
{
int i;
FlatView *view;
view = flatview_new(mr);
if (mr) {
render_memory_region(view, mr, int128_zero(),
addrrange_make(int128_zero(), int128_2_64()),
false, false);
}
flatview_simplify(view);
view->dispatch = address_space_dispatch_new(uc, view);
for (i = 0; i < view->nr; i++) {
MemoryRegionSection mrs =
section_from_flat_range(&view->ranges[i], view);
flatview_add_to_dispatch(view, &mrs);
}
address_space_dispatch_compact(view->dispatch);
g_hash_table_replace(uc->flat_views, mr, view);
return view;
}
static FlatView *address_space_get_flatview(AddressSpace *as)
{
FlatView *view;
view = as->current_map;
flatview_ref(view);
return 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 flatviews_init(struct uc_struct *uc)
{
if (uc->flat_views) {
return;
}
uc->flat_views = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL,
(GDestroyNotify) flatview_unref);
if (!uc->empty_view) {
uc->empty_view = generate_memory_topology(uc, NULL);
/* We keep it alive forever in the global variable. */
flatview_ref(uc->empty_view);
} else {
g_hash_table_replace(uc->flat_views, NULL, uc->empty_view);
flatview_ref(uc->empty_view);
}
}
static void flatviews_reset(struct uc_struct *uc)
{
AddressSpace *as;
if (uc->flat_views) {
g_hash_table_unref(uc->flat_views);
uc->flat_views = NULL;
}
flatviews_init(uc);
/* Render unique FVs */
QTAILQ_FOREACH(as, &uc->address_spaces, address_spaces_link) {
MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
if (g_hash_table_lookup(uc->flat_views, physmr)) {
continue;
}
generate_memory_topology(uc, physmr);
}
}
static void address_space_set_flatview(AddressSpace *as)
{
FlatView *old_view = address_space_to_flatview(as);
MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
FlatView *new_view = g_hash_table_lookup(as->uc->flat_views, physmr);
assert(new_view);
if (old_view == new_view) {
return;
}
if (old_view) {
flatview_ref(old_view);
}
flatview_ref(new_view);
if (!QTAILQ_EMPTY(&as->listeners)) {
FlatView tmpview = {0};
FlatView *old_view2 = old_view;
if (!old_view2) {
old_view2 = &tmpview;
}
address_space_update_topology_pass(as, old_view2, new_view, false);
address_space_update_topology_pass(as, old_view2, new_view, true);
}
/* Writes are protected by the BQL. */
atomic_set(&as->current_map, new_view);
if (old_view) {
flatview_unref(old_view);
}
/* Note that all the old MemoryRegions are still alive up to this
* point. This relieves most MemoryListeners from the need to
* ref/unref the MemoryRegions they get---unless they use them
* outside the iothread mutex, in which case precise reference
* counting is necessary.
*/
if (old_view) {
flatview_unref(old_view);
}
}
static void address_space_update_topology(AddressSpace *as)
{
MemoryRegion *physmr = memory_region_get_flatview_root(as->root);
struct uc_struct *uc = as->uc;
flatviews_init(uc);
if (!g_hash_table_lookup(uc->flat_views, physmr)) {
generate_memory_topology(uc, physmr);
}
address_space_set_flatview(as);
}
void memory_region_transaction_begin(struct uc_struct *uc)
{
++uc->memory_region_transaction_depth;
}
static void memory_region_clear_pending(struct uc_struct *uc)
{
uc->memory_region_update_pending = false;
}
void memory_region_transaction_commit(struct uc_struct *uc)
{
AddressSpace *as;
assert(uc->memory_region_transaction_depth);
--uc->memory_region_transaction_depth;
if (!uc->memory_region_transaction_depth) {
if (uc->memory_region_update_pending) {
flatviews_reset(uc);
MEMORY_LISTENER_CALL_GLOBAL(begin, Forward);
QTAILQ_FOREACH(as, &uc->address_spaces, address_spaces_link) {
address_space_set_flatview(as);
}
MEMORY_LISTENER_CALL_GLOBAL(commit, Forward);
}
memory_region_clear_pending(uc);
}
}
static void memory_region_destructor_none(MemoryRegion *mr)
{
}
static void memory_region_destructor_ram(MemoryRegion *mr)
{
qemu_ram_free(mr->uc, memory_region_get_ram_addr(mr));
}
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(struct uc_struct *uc, MemoryRegion *mr,
Object *owner,
const char *name,
uint64_t size)
{
object_initialize(uc, mr, sizeof(*mr), TYPE_MEMORY_REGION);
mr->uc = uc;
mr->size = int128_make64(size);
if (size == UINT64_MAX) {
mr->size = int128_2_64();
}
mr->name = g_strdup(name);
mr->owner = owner;
mr->ram_block = NULL;
if (name) {
char *escaped_name = memory_region_escape_name(name);
char *name_array = g_strdup_printf("%s[*]", escaped_name);
if (!owner) {
owner = qdev_get_machine(uc);
uc->owner = owner;
}
object_property_add_child(uc, owner, name_array, OBJECT(mr), &error_abort);
object_unref(uc, OBJECT(mr));
g_free(name_array);
g_free(escaped_name);
}
}
static void memory_region_get_addr(struct uc_struct *uc,
Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
uint64_t value = mr->addr;
visit_type_uint64(v, name, &value, errp);
}
static void memory_region_get_container(struct uc_struct *uc,
Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
gchar *path = (gchar *)"";
if (mr->container) {
path = object_get_canonical_path(OBJECT(mr->container));
}
visit_type_str(v, name, &path, errp);
if (mr->container) {
g_free(path);
}
}
static Object *memory_region_resolve_container(struct uc_struct *uc, Object *obj, void *opaque,
const char *part)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
return OBJECT(mr->container);
}
static void memory_region_get_priority(struct uc_struct *uc,
Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
int32_t value = mr->priority;
visit_type_int32(v, name, &value, errp);
}
static void memory_region_get_size(struct uc_struct *uc,
Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
uint64_t value = memory_region_size(mr);
visit_type_uint64(v, name, &value, errp);
}
static void memory_region_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
MemoryRegion *mr = MEMORY_REGION(uc, obj);
ObjectProperty *op;
mr->ops = &unassigned_mem_ops;
mr->enabled = true;
mr->romd_mode = true;
mr->global_locking = true;
mr->destructor = memory_region_destructor_none;
QTAILQ_INIT(&mr->subregions);
op = object_property_add(mr->uc, 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(mr->uc, OBJECT(mr), "addr", "uint64",
memory_region_get_addr,
NULL, /* memory_region_set_addr */
NULL, NULL, &error_abort);
object_property_add(mr->uc, OBJECT(mr), "priority", "uint32",
memory_region_get_priority,
NULL, /* memory_region_set_priority */
NULL, NULL, &error_abort);
object_property_add(mr->uc, OBJECT(mr), "size", "uint64",
memory_region_get_size,
NULL, /* memory_region_set_size, */
NULL, NULL, &error_abort);
}
static uint64_t unassigned_mem_read(struct uc_struct* uc, hwaddr addr, unsigned size)
{
#ifdef DEBUG_UNASSIGNED
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
#endif
if (uc->current_cpu != NULL) {
bool is_exec = uc->current_cpu->mem_io_access_type == MMU_INST_FETCH;
cpu_unassigned_access(uc->current_cpu, addr, false, is_exec, 0, size);
}
return 0;
}
static void unassigned_mem_write(struct uc_struct* uc, hwaddr addr,
uint64_t val, unsigned size)
{
#ifdef DEBUG_UNASSIGNED
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val);
#endif
if (uc->current_cpu != NULL) {
cpu_unassigned_access(uc->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 = {
NULL,
NULL,
NULL,
NULL,
DEVICE_NATIVE_ENDIAN,
{0,0,false,unassigned_mem_accepts},
};
static uint64_t memory_region_ram_device_read(struct uc_struct *uc,
void *opaque, hwaddr addr,
unsigned size)
{
MemoryRegion *mr = opaque;
uint64_t data = (uint64_t)~0;
switch (size) {
case 1:
data = *(uint8_t *)(mr->ram_block->host + addr);
break;
case 2:
data = *(uint16_t *)(mr->ram_block->host + addr);
break;
case 4:
data = *(uint32_t *)(mr->ram_block->host + addr);
break;
case 8:
data = *(uint64_t *)(mr->ram_block->host + addr);
break;
}
// Unicorn: commented out
//trace_memory_region_ram_device_read(get_cpu_index(), mr, addr, data, size);
return data;
}
static void memory_region_ram_device_write(struct uc_struct *uc,
void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
MemoryRegion *mr = opaque;
// Unicorn: commented out
//trace_memory_region_ram_device_write(get_cpu_index(), mr, addr, data, size);
switch (size) {
case 1:
*(uint8_t *)(mr->ram_block->host + addr) = (uint8_t)data;
break;
case 2:
*(uint16_t *)(mr->ram_block->host + addr) = (uint16_t)data;
break;
case 4:
*(uint32_t *)(mr->ram_block->host + addr) = (uint32_t)data;
break;
case 8:
*(uint64_t *)(mr->ram_block->host + addr) = data;
break;
}
}
static const MemoryRegionOps ram_device_mem_ops = {
memory_region_ram_device_read,
memory_region_ram_device_write,
NULL,
NULL,
DEVICE_HOST_ENDIAN,
// valid
{
1, 8,
true,
},
// impl
{
1, 8,
true,
},
};
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 {
return access_with_adjusted_size(addr, pval, size,
mr->ops->impl.min_access_size,
mr->ops->impl.max_access_size,
memory_region_read_with_attrs_accessor,
mr, attrs);
}
}
MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
hwaddr addr,
uint64_t *pval,
MemOp op,
MemTxAttrs attrs)
{
unsigned size = memop_size(op);
MemTxResult r;
if (!memory_region_access_valid(mr, addr, size, false)) {
*pval = unassigned_mem_read(mr->uc, addr, size);
return MEMTX_DECODE_ERROR;
}
r = memory_region_dispatch_read1(mr, addr, pval, size, attrs);
adjust_endianness(mr, pval, op);
return r;
}
MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
hwaddr addr,
uint64_t data,
MemOp op,
MemTxAttrs attrs)
{
unsigned size = memop_size(op);
if (!memory_region_access_valid(mr, addr, size, true)) {
unassigned_mem_write(mr->uc, addr, data, size);
return MEMTX_DECODE_ERROR;
}
adjust_endianness(mr, &data, op);
if (mr->ops->write) {
return access_with_adjusted_size(addr, &data, size,
mr->ops->impl.min_access_size,
mr->ops->impl.max_access_size,
memory_region_write_accessor, mr,
attrs);
} else {
return
access_with_adjusted_size(addr, &data, size,
mr->ops->impl.min_access_size,
mr->ops->impl.max_access_size,
memory_region_write_with_attrs_accessor,
mr, attrs);
}
}
void memory_region_init_io(struct uc_struct *uc, MemoryRegion *mr,
Object *owner,
const MemoryRegionOps *ops,
void *opaque,
const char *name,
uint64_t size)
{
memory_region_init(uc, mr, owner, name, size);
mr->ops = ops ? ops : &unassigned_mem_ops;
mr->opaque = opaque;
mr->terminates = true;
}
void memory_region_init_ram_nomigrate(struct uc_struct *uc,
MemoryRegion *mr,
Object *owner,
const char *name,
uint64_t size,
uint32_t perms,
Error **errp)
{
Error *err = NULL;
memory_region_init(uc, mr, owner, name, size);
mr->ram = true;
if (!(perms & UC_PROT_WRITE)) {
mr->readonly = true;
}
mr->perms = perms;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
mr->ram_block = qemu_ram_alloc(size, mr, &err);
mr->dirty_log_mask = tcg_enabled(uc) ? (1 << DIRTY_MEMORY_CODE) : 0;
if (err) {
mr->size = int128_zero();
object_unparent(uc, OBJECT(mr));
error_propagate(errp, err);
}
}
void memory_region_init_ram_ptr(struct uc_struct *uc, MemoryRegion *mr,
Object *owner,
const char *name,
uint64_t size,
void *ptr)
{
memory_region_init(uc, mr, owner, name, size);
mr->ram = true;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
mr->dirty_log_mask = tcg_enabled(uc) ? (1 << DIRTY_MEMORY_CODE) : 0;
/* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
assert(ptr != NULL);
mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
}
void memory_region_init_resizeable_ram(struct uc_struct *uc,
MemoryRegion *mr,
Object *owner,
const char *name,
uint64_t size,
uint64_t max_size,
void (*resized)(const char*,
uint64_t length,
void *host),
Error **errp)
{
Error *err = NULL;
memory_region_init(uc, mr, owner, name, size);
mr->ram = true;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
mr->ram_block = qemu_ram_alloc_resizeable(size, max_size, resized,
mr, &err);
mr->dirty_log_mask = tcg_enabled(uc) ? (1 << DIRTY_MEMORY_CODE) : 0;
if (err) {
mr->size = int128_zero();
object_unparent(uc, OBJECT(mr));
error_propagate(errp, err);
}
}
void memory_region_init_rom_nomigrate(struct uc_struct *uc,
MemoryRegion *mr,
struct Object *owner,
const char *name,
uint64_t size,
Error **errp)
{
Error *err = NULL;
memory_region_init(uc, mr, owner, name, size);
mr->ram = true;
mr->readonly = true;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
mr->ram_block = qemu_ram_alloc(size, mr, &err);
mr->dirty_log_mask = tcg_enabled(uc) ? (1 << DIRTY_MEMORY_CODE) : 0;
if (err) {
mr->size = int128_zero();
object_unparent(uc, OBJECT(mr));
error_propagate(errp, err);
}
}
void memory_region_init_ram_device_ptr(struct uc_struct *uc,
MemoryRegion *mr,
Object *owner,
const char *name,
uint64_t size,
void *ptr)
{
memory_region_init(uc, mr, owner, name, size);
mr->ram = true;
mr->terminates = true;
mr->ram_device = true;
mr->ops = &ram_device_mem_ops;
mr->opaque = mr;
mr->destructor = memory_region_destructor_ram;
mr->dirty_log_mask = tcg_enabled(uc) ? (1 << DIRTY_MEMORY_CODE) : 0;
/* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
assert(ptr != NULL);
mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_fatal);
}
void memory_region_init_alias(struct uc_struct *uc, MemoryRegion *mr,
Object *owner,
const char *name,
MemoryRegion *orig,
hwaddr offset,
uint64_t size)
{
memory_region_init(uc, mr, owner, name, size);
mr->alias = orig;
mr->alias_offset = offset;
}
static void memory_region_finalize(struct uc_struct *uc, Object *obj, void *opaque)
{
MemoryRegion *mr = MEMORY_REGION(uc, 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(uc);
while (!QTAILQ_EMPTY(&mr->subregions)) {
MemoryRegion *subregion = QTAILQ_FIRST(&mr->subregions);
memory_region_del_subregion(mr, subregion);
}
memory_region_transaction_commit(uc);
mr->destructor(mr);
g_free((char *)mr->name);
}
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->uc, mr->owner);
}
}
uint64_t memory_region_size(MemoryRegion *mr)
{
if (int128_eq(mr->size, int128_2_64())) {
return UINT64_MAX;
}
return int128_get64(mr->size);
}
const char *memory_region_name(const MemoryRegion *mr)
{
if (!mr->name) {
((MemoryRegion *)mr)->name =
object_get_canonical_path_component(OBJECT(mr));
}
return mr->name;
}
bool memory_region_is_ram_device(MemoryRegion *mr)
{
return mr->ram_device;
}
uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr)
{
return mr->dirty_log_mask;
}
bool memory_region_is_logging(MemoryRegion *mr, uint8_t client)
{
return memory_region_get_dirty_log_mask(mr) & (1 << client);
}
void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
{
if (mr->readonly != readonly) {
memory_region_transaction_begin(mr->uc);
mr->readonly = readonly;
if (readonly) {
mr->perms &= ~UC_PROT_WRITE;
}
else {
mr->perms |= UC_PROT_WRITE;
}
mr->uc->memory_region_update_pending |= mr->enabled;
memory_region_transaction_commit(mr->uc);
}
}
void memory_region_clear_global_locking(MemoryRegion *mr)
{
mr->global_locking = false;
}
void memory_region_set_nonvolatile(MemoryRegion *mr, bool nonvolatile)
{
if (mr->nonvolatile != nonvolatile) {
memory_region_transaction_begin(mr->uc);
mr->nonvolatile = nonvolatile;
mr->uc->memory_region_update_pending |= mr->enabled;
memory_region_transaction_commit(mr->uc);
}
}
void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode)
{
if (mr->romd_mode != romd_mode) {
memory_region_transaction_begin(mr->uc);
mr->romd_mode = romd_mode;
mr->uc->memory_region_update_pending |= mr->enabled;
memory_region_transaction_commit(mr->uc);
}
}
int memory_region_get_fd(MemoryRegion *mr)
{
int fd;
// Unicorn: commented out
//rcu_read_lock();
while (mr->alias) {
mr = mr->alias;
}
fd = mr->ram_block->fd;
//rcu_read_unlock();
return fd;
}
void memory_region_do_writeback(MemoryRegion *mr, hwaddr addr, hwaddr size)
{
/*
* Might be extended case needed to cover
* different types of memory regions
*/
if (mr->ram_block && mr->dirty_log_mask) {
qemu_ram_writeback(mr->uc, mr->ram_block, addr, size);
}
}
void *memory_region_get_ram_ptr(MemoryRegion *mr)
{
void *ptr;
uint64_t offset = 0;
// Unicorn: commented out
// rcu_read_lock();
while (mr->alias) {
offset += mr->alias_offset;
mr = mr->alias;
}
assert(mr->ram_block);
ptr = qemu_map_ram_ptr(mr->uc, mr->ram_block, offset);
// Unicorn: commented out
//rcu_read_unlock();
return ptr;
}
MemoryRegion *memory_region_from_host(struct uc_struct *uc, void *ptr, ram_addr_t *offset)
{
RAMBlock *block;
block = qemu_ram_block_from_host(uc, ptr, false, offset);
if (!block) {
return NULL;
}
return block->mr;
}
ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr)
{
return mr->ram_block ? mr->ram_block->offset : RAM_ADDR_INVALID;
}
static void memory_region_update_container_subregions(MemoryRegion *subregion)
{
MemoryRegion *mr = subregion->container;
MemoryRegion *other;
memory_region_transaction_begin(mr->uc);
memory_region_ref(subregion);
QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
if (subregion->priority >= other->priority) {
QTAILQ_INSERT_BEFORE(other, subregion, subregions_link);
goto done;
}
}
QTAILQ_INSERT_TAIL(&mr->subregions, subregion, subregions_link);
done:
mr->uc->memory_region_update_pending |= mr->enabled && subregion->enabled;
memory_region_transaction_commit(mr->uc);
}
static void memory_region_add_subregion_common(MemoryRegion *mr,
hwaddr offset,
MemoryRegion *subregion)
{
assert(!subregion->container);
subregion->container = mr;
subregion->addr = offset;
subregion->end = offset + int128_get64(subregion->size);
memory_region_update_container_subregions(subregion);
}
void memory_region_add_subregion(MemoryRegion *mr,
hwaddr offset,
MemoryRegion *subregion)
{
subregion->priority = 0;
memory_region_add_subregion_common(mr, offset, subregion);
}
void memory_region_add_subregion_overlap(MemoryRegion *mr,
hwaddr offset,
MemoryRegion *subregion,
int priority)
{
subregion->priority = priority;
memory_region_add_subregion_common(mr, offset, subregion);
}
void memory_region_del_subregion(MemoryRegion *mr,
MemoryRegion *subregion)
{
memory_region_transaction_begin(mr->uc);
assert(subregion->container == mr);
subregion->container = NULL;
QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link);
memory_region_unref(subregion);
mr->uc->memory_region_update_pending |= mr->enabled && subregion->enabled;
memory_region_transaction_commit(mr->uc);
}
void memory_region_set_enabled(MemoryRegion *mr, bool enabled)
{
if (enabled == mr->enabled) {
return;
}
memory_region_transaction_begin(mr->uc);
mr->enabled = enabled;
mr->uc->memory_region_update_pending = true;
memory_region_transaction_commit(mr->uc);
}
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->uc);
mr->size = s;
mr->uc->memory_region_update_pending = true;
memory_region_transaction_commit(mr->uc);
}
static void memory_region_readd_subregion(MemoryRegion *mr)
{
MemoryRegion *container = mr->container;
if (container) {
memory_region_transaction_begin(mr->uc);
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(mr->uc);
}
}
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->uc);
mr->alias_offset = offset;
mr->uc->memory_region_update_pending |= mr->enabled;
memory_region_transaction_commit(mr->uc);
}
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 = {};
MemoryRegion *root;
AddressSpace *as;
AddrRange range;
FlatView *view;
FlatRange *fr;
addr += mr->addr;
for (root = mr; root->container; ) {
root = root->container;
addr += root->addr;
}
as = memory_region_to_address_space(root);
if (!as) {
return ret;
}
range = addrrange_make(int128_make64(addr), int128_make64(size));
view = address_space_to_flatview(as);
fr = flatview_lookup(view, range);
if (!fr) {
return ret;
}
while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) {
--fr;
}
ret.mr = fr->mr;
ret.fv = view;
range = addrrange_intersection(range, fr->addr);
ret.offset_within_region = fr->offset_in_region;
ret.offset_within_region += int128_get64(int128_sub(range.start,
fr->addr.start));
ret.size = range.size;
ret.offset_within_address_space = int128_get64(range.start);
ret.readonly = fr->readonly;
ret.nonvolatile = fr->nonvolatile;
return ret;
}
MemoryRegionSection memory_region_find(MemoryRegion *mr,
hwaddr addr, uint64_t size)
{
MemoryRegionSection ret;
// Unicorn: commented out
//rcu_read_lock();
ret = memory_region_find_rcu(mr, addr, size);
if (ret.mr) {
memory_region_ref(ret.mr);
}
// Unicorn: commented out
//rcu_read_unlock();
return ret;
}
bool memory_region_present(MemoryRegion *container, hwaddr addr)
{
MemoryRegion *mr;
// Unicorn: commented out
//rcu_read_lock();
mr = memory_region_find_rcu(container, addr, 1).mr;
// Unicorn: commented out
//rcu_read_unlock();
return mr && mr != container;
}
static QEMU_UNUSED_FUNC void listener_add_address_space(MemoryListener *listener,
AddressSpace *as)
{
FlatView *view;
FlatRange *fr;
if (listener->begin) {
listener->begin(listener);
}
if (as->uc->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 = MemoryRegionSection_make(
fr->mr,
view,
fr->offset_in_region,
fr->addr.size,
int128_get64(fr->addr.start),
fr->readonly);
if (fr->dirty_log_mask && listener->log_start) {
listener->log_start(listener, &section, 0, fr->dirty_log_mask);
}
if (listener->region_add) {
listener->region_add(listener, &section);
}
}
flatview_unref(view);
}
void memory_listener_register(struct uc_struct* uc, MemoryListener *listener, AddressSpace *as)
{
MemoryListener *other = NULL;
listener->address_space = as;
if (QTAILQ_EMPTY(&uc->memory_listeners)
|| listener->priority >= QTAILQ_LAST(&uc->memory_listeners,
memory_listeners)->priority) {
QTAILQ_INSERT_TAIL(&uc->memory_listeners, listener, link);
} else {
QTAILQ_FOREACH(other, &uc->memory_listeners, link) {
if (listener->priority < other->priority) {
break;
}
}
QTAILQ_INSERT_BEFORE(other, listener, link);
}
if (QTAILQ_EMPTY(&as->listeners)
|| listener->priority >= QTAILQ_LAST(&as->listeners,
memory_listeners)->priority) {
QTAILQ_INSERT_TAIL(&as->listeners, listener, link_as);
} else {
QTAILQ_FOREACH(other, &as->listeners, link_as) {
if (listener->priority < other->priority) {
break;
}
}
QTAILQ_INSERT_BEFORE(other, listener, link_as);
}
// Unicorn: TODO: Handle leaks that occur when this is uncommented
//listener_add_address_space(listener, as);
}
void memory_listener_unregister(struct uc_struct *uc, MemoryListener *listener)
{
QTAILQ_REMOVE(&uc->memory_listeners, listener, link);
QTAILQ_REMOVE(&listener->address_space->listeners, listener, link_as);
}
void address_space_init(struct uc_struct *uc, AddressSpace *as, MemoryRegion *root, const char *name)
{
if (QTAILQ_EMPTY(&uc->address_spaces)) {
memory_init(uc);
}
memory_region_ref(root);
as->uc = uc;
as->root = root;
as->current_map = NULL;
QTAILQ_INIT(&as->listeners);
QTAILQ_INSERT_TAIL(&uc->address_spaces, as, address_spaces_link);
as->name = g_strdup(name ? name : "anonymous");
address_space_update_topology(as);
}
static void do_address_space_destroy(AddressSpace *as)
{
// TODO(danghvu): why assert fail here?
//QTAILQ_FOREACH(listener, &as->uc->memory_listeners, link) {
// assert(QTAILQ_EMPTY(&as->listeners));
//}
flatview_unref(as->current_map);
g_free(as->name);
// Unicorn: commented out
//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->uc);
as->root = NULL;
memory_region_transaction_commit(as->uc);
QTAILQ_REMOVE(&as->uc->address_spaces, as, address_spaces_link);
/* At this point, as->dispatch and as->current_map are dummy
* entries that the guest should never use. Wait for the old
* values to expire before freeing the data.
*/
as->root = root;
do_address_space_destroy(as);
// Unicorn: Commented out and call it directly
// 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 const TypeInfo memory_region_info = {
TYPE_MEMORY_REGION,
TYPE_OBJECT,
0,
sizeof(MemoryRegion),
NULL,
memory_region_initfn,
NULL,
memory_region_finalize,
};
void memory_register_types(struct uc_struct *uc)
{
type_register_static(uc, &memory_region_info);
}
MemOp devend_memop(enum device_endian end)
{
static MemOp conv[] = {
[DEVICE_LITTLE_ENDIAN] = MO_LE,
[DEVICE_BIG_ENDIAN] = MO_BE,
[DEVICE_NATIVE_ENDIAN] = MO_TE,
[DEVICE_HOST_ENDIAN] = 0,
};
switch (end) {
case DEVICE_LITTLE_ENDIAN:
case DEVICE_BIG_ENDIAN:
case DEVICE_NATIVE_ENDIAN:
return conv[end];
default:
g_assert_not_reached();
}
}
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