X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=memory.c;h=28f64491d06fcbb217928733491dbb5e6547da9d;hb=30c367ed446b6ea53245589a5cf373578ac075d7;hp=5cb8f4a8b2e098a27623ee1fae82af2f1f5cbce1;hpb=8819c10b5d55d537d59a0ffd5d623f348fc36c47;p=qemu.git diff --git a/memory.c b/memory.c index 5cb8f4a8b..28f64491d 100644 --- a/memory.c +++ b/memory.c @@ -17,7 +17,8 @@ #include "exec/address-spaces.h" #include "exec/ioport.h" #include "qemu/bitops.h" -#include "sysemu/kvm.h" +#include "qom/object.h" +#include "trace.h" #include #include "exec/memory-internal.h" @@ -28,12 +29,26 @@ static unsigned memory_region_transaction_depth; static bool memory_region_update_pending; static bool global_dirty_log = false; +/* flat_view_mutex is taken around reading as->current_map; the critical + * section is extremely short, so I'm using a single mutex for every AS. + * We could also RCU for the read-side. + * + * The BQL is taken around transaction commits, hence both locks are taken + * while writing to as->current_map (with the BQL taken outside). + */ +static QemuMutex flat_view_mutex; + static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners = QTAILQ_HEAD_INITIALIZER(memory_listeners); static QTAILQ_HEAD(, AddressSpace) address_spaces = QTAILQ_HEAD_INITIALIZER(address_spaces); +static void memory_init(void) +{ + qemu_mutex_init(&flat_view_mutex); +} + typedef struct AddrRange AddrRange; /* @@ -147,12 +162,13 @@ static bool memory_listener_match(MemoryListener *listener, } \ } while (0) +/* No need to ref/unref .mr, the FlatRange keeps it alive. */ #define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \ MEMORY_LISTENER_CALL(callback, dir, (&(MemoryRegionSection) { \ .mr = (fr)->mr, \ .address_space = (as), \ .offset_within_region = (fr)->offset_in_region, \ - .size = int128_get64((fr)->addr.size), \ + .size = (fr)->addr.size, \ .offset_within_address_space = int128_get64((fr)->addr.start), \ .readonly = (fr)->readonly, \ })) @@ -223,6 +239,7 @@ struct FlatRange { * order. */ struct FlatView { + unsigned ref; FlatRange *ranges; unsigned nr; unsigned nr_allocated; @@ -244,6 +261,7 @@ static bool flatrange_equal(FlatRange *a, FlatRange *b) static void flatview_init(FlatView *view) { + view->ref = 1; view->ranges = NULL; view->nr = 0; view->nr_allocated = 0; @@ -262,12 +280,31 @@ static void flatview_insert(FlatView *view, unsigned pos, FlatRange *range) 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) @@ -282,7 +319,7 @@ static bool can_merge(FlatRange *r1, FlatRange *r2) && r1->readonly == r2->readonly; } -/* Attempt to simplify a view by merging ajacent ranges */ +/* Attempt to simplify a view by merging adjacent ranges */ static void flatview_simplify(FlatView *view) { unsigned i, j; @@ -302,65 +339,104 @@ static void flatview_simplify(FlatView *view) } } -static void memory_region_oldmmio_read_accessor(void *opaque, +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 void memory_region_oldmmio_read_accessor(MemoryRegion *mr, hwaddr addr, uint64_t *value, unsigned size, unsigned shift, uint64_t mask) { - MemoryRegion *mr = opaque; 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; } -static void memory_region_read_accessor(void *opaque, +static void memory_region_read_accessor(MemoryRegion *mr, hwaddr addr, uint64_t *value, unsigned size, unsigned shift, uint64_t mask) { - MemoryRegion *mr = opaque; uint64_t tmp; if (mr->flush_coalesced_mmio) { qemu_flush_coalesced_mmio_buffer(); } tmp = mr->ops->read(mr->opaque, addr, size); + trace_memory_region_ops_read(mr, addr, tmp, size); *value |= (tmp & mask) << shift; } -static void memory_region_oldmmio_write_accessor(void *opaque, +static void memory_region_oldmmio_write_accessor(MemoryRegion *mr, hwaddr addr, uint64_t *value, unsigned size, unsigned shift, uint64_t mask) { - MemoryRegion *mr = opaque; 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); } -static void memory_region_write_accessor(void *opaque, +static void memory_region_write_accessor(MemoryRegion *mr, hwaddr addr, uint64_t *value, unsigned size, unsigned shift, uint64_t mask) { - MemoryRegion *mr = opaque; uint64_t tmp; if (mr->flush_coalesced_mmio) { qemu_flush_coalesced_mmio_buffer(); } tmp = (*value >> shift) & mask; + trace_memory_region_ops_write(mr, addr, tmp, size); mr->ops->write(mr->opaque, addr, tmp, size); } @@ -369,13 +445,13 @@ static void access_with_adjusted_size(hwaddr addr, unsigned size, unsigned access_size_min, unsigned access_size_max, - void (*access)(void *opaque, + void (*access)(MemoryRegion *mr, hwaddr addr, uint64_t *value, unsigned size, unsigned shift, uint64_t mask), - void *opaque) + MemoryRegion *mr) { uint64_t access_mask; unsigned access_size; @@ -391,104 +467,18 @@ static void access_with_adjusted_size(hwaddr addr, /* FIXME: support unaligned access? */ access_size = MAX(MIN(size, access_size_max), access_size_min); access_mask = -1ULL >> (64 - access_size * 8); - for (i = 0; i < size; i += access_size) { -#ifdef TARGET_WORDS_BIGENDIAN - access(opaque, addr + i, value, access_size, - (size - access_size - i) * 8, access_mask); -#else - access(opaque, addr + i, value, access_size, i * 8, access_mask); -#endif - } -} - -static const MemoryRegionPortio *find_portio(MemoryRegion *mr, uint64_t offset, - unsigned width, bool write) -{ - const MemoryRegionPortio *mrp; - - for (mrp = mr->ops->old_portio; mrp->size; ++mrp) { - if (offset >= mrp->offset && offset < mrp->offset + mrp->len - && width == mrp->size - && (write ? (bool)mrp->write : (bool)mrp->read)) { - return mrp; + if (memory_region_big_endian(mr)) { + for (i = 0; i < size; i += access_size) { + access(mr, addr + i, value, access_size, + (size - access_size - i) * 8, access_mask); } - } - return NULL; -} - -static void memory_region_iorange_read(IORange *iorange, - uint64_t offset, - unsigned width, - uint64_t *data) -{ - MemoryRegionIORange *mrio - = container_of(iorange, MemoryRegionIORange, iorange); - MemoryRegion *mr = mrio->mr; - - offset += mrio->offset; - if (mr->ops->old_portio) { - const MemoryRegionPortio *mrp = find_portio(mr, offset - mrio->offset, - width, false); - - *data = ((uint64_t)1 << (width * 8)) - 1; - if (mrp) { - *data = mrp->read(mr->opaque, offset); - } else if (width == 2) { - mrp = find_portio(mr, offset - mrio->offset, 1, false); - assert(mrp); - *data = mrp->read(mr->opaque, offset) | - (mrp->read(mr->opaque, offset + 1) << 8); - } - return; - } - *data = 0; - access_with_adjusted_size(offset, data, width, - mr->ops->impl.min_access_size, - mr->ops->impl.max_access_size, - memory_region_read_accessor, mr); -} - -static void memory_region_iorange_write(IORange *iorange, - uint64_t offset, - unsigned width, - uint64_t data) -{ - MemoryRegionIORange *mrio - = container_of(iorange, MemoryRegionIORange, iorange); - MemoryRegion *mr = mrio->mr; - - offset += mrio->offset; - if (mr->ops->old_portio) { - const MemoryRegionPortio *mrp = find_portio(mr, offset - mrio->offset, - width, true); - - if (mrp) { - mrp->write(mr->opaque, offset, data); - } else if (width == 2) { - mrp = find_portio(mr, offset - mrio->offset, 1, true); - assert(mrp); - mrp->write(mr->opaque, offset, data & 0xff); - mrp->write(mr->opaque, offset + 1, data >> 8); + } else { + for (i = 0; i < size; i += access_size) { + access(mr, addr + i, value, access_size, i * 8, access_mask); } - return; } - access_with_adjusted_size(offset, &data, width, - mr->ops->impl.min_access_size, - mr->ops->impl.max_access_size, - memory_region_write_accessor, mr); } -static void memory_region_iorange_destructor(IORange *iorange) -{ - g_free(container_of(iorange, MemoryRegionIORange, iorange)); -} - -const IORangeOps memory_region_iorange_ops = { - .read = memory_region_iorange_read, - .write = memory_region_iorange_write, - .destructor = memory_region_iorange_destructor, -}; - static AddressSpace *memory_region_to_address_space(MemoryRegion *mr) { AddressSpace *as; @@ -556,6 +546,11 @@ static void render_memory_region(FlatView *view, base = clip.start; remain = clip.size; + fr.mr = mr; + fr.dirty_log_mask = mr->dirty_log_mask; + 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))) { @@ -564,12 +559,8 @@ static void render_memory_region(FlatView *view, if (int128_lt(base, view->ranges[i].addr.start)) { now = int128_min(remain, int128_sub(view->ranges[i].addr.start, base)); - fr.mr = mr; fr.offset_in_region = offset_in_region; fr.addr = addrrange_make(base, now); - fr.dirty_log_mask = mr->dirty_log_mask; - fr.romd_mode = mr->romd_mode; - fr.readonly = readonly; flatview_insert(view, i, &fr); ++i; int128_addto(&base, now); @@ -584,28 +575,25 @@ static void render_memory_region(FlatView *view, int128_subfrom(&remain, now); } if (int128_nz(remain)) { - fr.mr = mr; fr.offset_in_region = offset_in_region; fr.addr = addrrange_make(base, remain); - fr.dirty_log_mask = mr->dirty_log_mask; - fr.romd_mode = mr->romd_mode; - fr.readonly = readonly; flatview_insert(view, i, &fr); } } /* Render a memory topology into a list of disjoint absolute ranges. */ -static FlatView generate_memory_topology(MemoryRegion *mr) +static FlatView *generate_memory_topology(MemoryRegion *mr) { - FlatView view; + FlatView *view; - flatview_init(&view); + view = g_new(FlatView, 1); + flatview_init(view); if (mr) { - render_memory_region(&view, mr, int128_zero(), + render_memory_region(view, mr, int128_zero(), addrrange_make(int128_zero(), int128_2_64()), false); } - flatview_simplify(&view); + flatview_simplify(view); return view; } @@ -634,7 +622,7 @@ static void address_space_add_del_ioeventfds(AddressSpace *as, section = (MemoryRegionSection) { .address_space = as, .offset_within_address_space = int128_get64(fd->addr.start), - .size = int128_get64(fd->addr.size), + .size = fd->addr.size, }; MEMORY_LISTENER_CALL(eventfd_del, Forward, §ion, fd->match_data, fd->data, fd->e); @@ -647,7 +635,7 @@ static void address_space_add_del_ioeventfds(AddressSpace *as, section = (MemoryRegionSection) { .address_space = as, .offset_within_address_space = int128_get64(fd->addr.start), - .size = int128_get64(fd->addr.size), + .size = fd->addr.size, }; MEMORY_LISTENER_CALL(eventfd_add, Reverse, §ion, fd->match_data, fd->data, fd->e); @@ -659,15 +647,28 @@ static void address_space_add_del_ioeventfds(AddressSpace *as, } } +static FlatView *address_space_get_flatview(AddressSpace *as) +{ + FlatView *view; + + qemu_mutex_lock(&flat_view_mutex); + view = as->current_map; + flatview_ref(view); + qemu_mutex_unlock(&flat_view_mutex); + return view; +} + static void address_space_update_ioeventfds(AddressSpace *as) { + FlatView *view; FlatRange *fr; unsigned ioeventfd_nb = 0; MemoryRegionIoeventfd *ioeventfds = NULL; AddrRange tmp; unsigned i; - FOR_EACH_FLAT_RANGE(fr, as->current_map) { + 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, @@ -688,11 +689,12 @@ static void address_space_update_ioeventfds(AddressSpace *as) g_free(as->ioeventfds); as->ioeventfds = ioeventfds; as->ioeventfd_nb = ioeventfd_nb; + flatview_unref(view); } static void address_space_update_topology_pass(AddressSpace *as, - FlatView old_view, - FlatView new_view, + const FlatView *old_view, + const FlatView *new_view, bool adding) { unsigned iold, inew; @@ -702,14 +704,14 @@ static void address_space_update_topology_pass(AddressSpace *as, * 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]; + 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]; + if (inew < new_view->nr) { + frnew = &new_view->ranges[inew]; } else { frnew = NULL; } @@ -719,7 +721,7 @@ static void address_space_update_topology_pass(AddressSpace *as, || 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 new but attributes changed). */ + /* In old but not in new, or in both but attributes changed. */ if (!adding) { MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del); @@ -727,7 +729,7 @@ static void address_space_update_topology_pass(AddressSpace *as, ++iold; } else if (frold && frnew && flatrange_equal(frold, frnew)) { - /* In both (logging may have changed) */ + /* In both and unchanged (except logging may have changed) */ if (adding) { MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop); @@ -755,14 +757,25 @@ static void address_space_update_topology_pass(AddressSpace *as, static void address_space_update_topology(AddressSpace *as) { - FlatView old_view = *as->current_map; - FlatView new_view = generate_memory_topology(as->root); + 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); - *as->current_map = new_view; - flatview_destroy(&old_view); + qemu_mutex_lock(&flat_view_mutex); + flatview_unref(as->current_map); + as->current_map = new_view; + qemu_mutex_unlock(&flat_view_mutex); + + /* Note that all the old MemoryRegions are still alive up to this + * point. This relieves most MemoryListeners from the need to + * ref/unref the MemoryRegions they get---unless they use them + * outside the iothread mutex, in which case precise reference + * counting is necessary. + */ + flatview_unref(old_view); + address_space_update_ioeventfds(as); } @@ -799,6 +812,11 @@ static void memory_region_destructor_ram(MemoryRegion *mr) qemu_ram_free(mr->ram_addr); } +static void memory_region_destructor_alias(MemoryRegion *mr) +{ + memory_region_unref(mr->alias); +} + static void memory_region_destructor_ram_from_ptr(MemoryRegion *mr) { qemu_ram_free_from_ptr(mr->ram_addr); @@ -809,21 +827,15 @@ static void memory_region_destructor_rom_device(MemoryRegion *mr) qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK); } -static bool memory_region_wrong_endianness(MemoryRegion *mr) -{ -#ifdef TARGET_WORDS_BIGENDIAN - return mr->ops->endianness == DEVICE_LITTLE_ENDIAN; -#else - return mr->ops->endianness == DEVICE_BIG_ENDIAN; -#endif -} - void memory_region_init(MemoryRegion *mr, + Object *owner, const char *name, uint64_t size) { mr->ops = &unassigned_mem_ops; mr->opaque = NULL; + mr->owner = owner; + mr->iommu_ops = NULL; mr->parent = NULL; mr->size = int128_make64(size); if (size == UINT64_MAX) { @@ -857,9 +869,9 @@ static uint64_t unassigned_mem_read(void *opaque, hwaddr addr, #ifdef DEBUG_UNASSIGNED printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); #endif -#if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE) - cpu_unassigned_access(cpu_single_env, addr, 0, 0, 0, size); -#endif + if (current_cpu != NULL) { + cpu_unassigned_access(current_cpu, addr, false, false, 0, size); + } return 0; } @@ -869,9 +881,9 @@ static void unassigned_mem_write(void *opaque, hwaddr addr, #ifdef DEBUG_UNASSIGNED printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val); #endif -#if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE) - cpu_unassigned_access(cpu_single_env, addr, 1, 0, 0, size); -#endif + if (current_cpu != NULL) { + cpu_unassigned_access(current_cpu, addr, true, false, 0, size); + } } static bool unassigned_mem_accepts(void *opaque, hwaddr addr, @@ -941,27 +953,6 @@ static uint64_t memory_region_dispatch_read1(MemoryRegion *mr, return data; } -static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size) -{ - if (memory_region_wrong_endianness(mr)) { - switch (size) { - case 1: - break; - case 2: - *data = bswap16(*data); - break; - case 4: - *data = bswap32(*data); - break; - case 8: - *data = bswap64(*data); - break; - default: - abort(); - } - } -} - static bool memory_region_dispatch_read(MemoryRegion *mr, hwaddr addr, uint64_t *pval, @@ -1002,12 +993,13 @@ static bool memory_region_dispatch_write(MemoryRegion *mr, } void memory_region_init_io(MemoryRegion *mr, + Object *owner, const MemoryRegionOps *ops, void *opaque, const char *name, uint64_t size) { - memory_region_init(mr, name, size); + memory_region_init(mr, owner, name, size); mr->ops = ops; mr->opaque = opaque; mr->terminates = true; @@ -1015,10 +1007,11 @@ void memory_region_init_io(MemoryRegion *mr, } void memory_region_init_ram(MemoryRegion *mr, + Object *owner, const char *name, uint64_t size) { - memory_region_init(mr, name, size); + memory_region_init(mr, owner, name, size); mr->ram = true; mr->terminates = true; mr->destructor = memory_region_destructor_ram; @@ -1026,11 +1019,12 @@ void memory_region_init_ram(MemoryRegion *mr, } void memory_region_init_ram_ptr(MemoryRegion *mr, + Object *owner, const char *name, uint64_t size, void *ptr) { - memory_region_init(mr, name, size); + memory_region_init(mr, owner, name, size); mr->ram = true; mr->terminates = true; mr->destructor = memory_region_destructor_ram_from_ptr; @@ -1038,23 +1032,27 @@ void memory_region_init_ram_ptr(MemoryRegion *mr, } void memory_region_init_alias(MemoryRegion *mr, + Object *owner, const char *name, MemoryRegion *orig, hwaddr offset, uint64_t size) { - memory_region_init(mr, name, size); + memory_region_init(mr, owner, name, size); + memory_region_ref(orig); + mr->destructor = memory_region_destructor_alias; mr->alias = orig; mr->alias_offset = offset; } void memory_region_init_rom_device(MemoryRegion *mr, + Object *owner, const MemoryRegionOps *ops, void *opaque, const char *name, uint64_t size) { - memory_region_init(mr, name, size); + memory_region_init(mr, owner, name, size); mr->ops = ops; mr->opaque = opaque; mr->terminates = true; @@ -1063,11 +1061,24 @@ void memory_region_init_rom_device(MemoryRegion *mr, mr->ram_addr = qemu_ram_alloc(size, mr); } +void memory_region_init_iommu(MemoryRegion *mr, + Object *owner, + const MemoryRegionIOMMUOps *ops, + const char *name, + uint64_t size) +{ + memory_region_init(mr, owner, name, size); + mr->iommu_ops = ops, + mr->terminates = true; /* then re-forwards */ + notifier_list_init(&mr->iommu_notify); +} + void memory_region_init_reservation(MemoryRegion *mr, + Object *owner, const char *name, uint64_t size) { - memory_region_init_io(mr, &unassigned_mem_ops, mr, name, size); + memory_region_init_io(mr, owner, &unassigned_mem_ops, mr, name, size); } void memory_region_destroy(MemoryRegion *mr) @@ -1080,6 +1091,25 @@ void memory_region_destroy(MemoryRegion *mr) g_free(mr->ioeventfds); } +Object *memory_region_owner(MemoryRegion *mr) +{ + return mr->owner; +} + +void memory_region_ref(MemoryRegion *mr) +{ + if (mr && mr->owner) { + object_ref(mr->owner); + } +} + +void memory_region_unref(MemoryRegion *mr) +{ + if (mr && mr->owner) { + object_unref(mr->owner); + } +} + uint64_t memory_region_size(MemoryRegion *mr) { if (int128_eq(mr->size, int128_2_64())) { @@ -1108,6 +1138,28 @@ bool memory_region_is_rom(MemoryRegion *mr) return mr->ram && mr->readonly; } +bool memory_region_is_iommu(MemoryRegion *mr) +{ + return mr->iommu_ops; +} + +void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n) +{ + notifier_list_add(&mr->iommu_notify, n); +} + +void memory_region_unregister_iommu_notifier(Notifier *n) +{ + notifier_remove(n); +} + +void memory_region_notify_iommu(MemoryRegion *mr, + IOMMUTLBEntry entry) +{ + assert(memory_region_is_iommu(mr)); + notifier_list_notify(&mr->iommu_notify, &entry); +} + void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client) { uint8_t mask = 1 << client; @@ -1155,11 +1207,13 @@ void memory_region_sync_dirty_bitmap(MemoryRegion *mr) FlatRange *fr; QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - FOR_EACH_FLAT_RANGE(fr, as->current_map) { + 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); } } @@ -1205,17 +1259,19 @@ void *memory_region_get_ram_ptr(MemoryRegion *mr) static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpace *as) { + FlatView *view; FlatRange *fr; CoalescedMemoryRange *cmr; AddrRange tmp; MemoryRegionSection section; - FOR_EACH_FLAT_RANGE(fr, as->current_map) { + 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 = int128_get64(fr->addr.size), + .size = fr->addr.size, }; MEMORY_LISTENER_CALL(coalesced_mmio_del, Reverse, §ion, @@ -1235,6 +1291,7 @@ static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpa } } } + flatview_unref(view); } static void memory_region_update_coalesced_range(MemoryRegion *mr) @@ -1367,6 +1424,7 @@ static void memory_region_add_subregion_common(MemoryRegion *mr, memory_region_transaction_begin(); assert(!subregion->parent); + memory_region_ref(subregion); subregion->parent = mr; subregion->addr = offset; QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { @@ -1415,7 +1473,7 @@ void memory_region_add_subregion(MemoryRegion *mr, void memory_region_add_subregion_overlap(MemoryRegion *mr, hwaddr offset, MemoryRegion *subregion, - unsigned priority) + int priority) { subregion->may_overlap = true; subregion->priority = priority; @@ -1429,6 +1487,7 @@ void memory_region_del_subregion(MemoryRegion *mr, assert(subregion->parent == mr); subregion->parent = NULL; QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link); + memory_region_unref(subregion); memory_region_update_pending |= mr->enabled && subregion->enabled; memory_region_transaction_commit(); } @@ -1447,7 +1506,7 @@ void memory_region_set_enabled(MemoryRegion *mr, bool enabled) void memory_region_set_address(MemoryRegion *mr, hwaddr addr) { MemoryRegion *parent = mr->parent; - unsigned priority = mr->priority; + int priority = mr->priority; bool may_overlap = mr->may_overlap; if (addr == mr->addr || !parent) { @@ -1456,12 +1515,14 @@ void memory_region_set_address(MemoryRegion *mr, hwaddr addr) } memory_region_transaction_begin(); + memory_region_ref(mr); memory_region_del_subregion(parent, mr); if (may_overlap) { memory_region_add_subregion_overlap(parent, addr, mr, priority); } else { memory_region_add_subregion(parent, addr, mr); } + memory_region_unref(mr); memory_region_transaction_commit(); } @@ -1497,19 +1558,30 @@ static int cmp_flatrange_addr(const void *addr_, const void *fr_) return 0; } -static FlatRange *address_space_lookup(AddressSpace *as, AddrRange addr) +static FlatRange *flatview_lookup(FlatView *view, AddrRange addr) { - return bsearch(&addr, as->current_map->ranges, as->current_map->nr, + return bsearch(&addr, view->ranges, view->nr, sizeof(FlatRange), cmp_flatrange_addr); } +bool memory_region_present(MemoryRegion *parent, hwaddr addr) +{ + MemoryRegion *mr = memory_region_find(parent, addr, 1).mr; + if (!mr) { + return false; + } + memory_region_unref(mr); + return true; +} + MemoryRegionSection memory_region_find(MemoryRegion *mr, hwaddr addr, uint64_t size) { - MemoryRegionSection ret = { .mr = NULL, .size = 0 }; + MemoryRegionSection ret = { .mr = NULL }; MemoryRegion *root; AddressSpace *as; AddrRange range; + FlatView *view; FlatRange *fr; addr += mr->addr; @@ -1520,13 +1592,14 @@ MemoryRegionSection memory_region_find(MemoryRegion *mr, as = memory_region_to_address_space(root); range = addrrange_make(int128_make64(addr), int128_make64(size)); - fr = address_space_lookup(as, range); + + view = address_space_get_flatview(as); + fr = flatview_lookup(view, range); if (!fr) { return ret; } - while (fr > as->current_map->ranges - && addrrange_intersects(fr[-1].addr, range)) { + while (fr > view->ranges && addrrange_intersects(fr[-1].addr, range)) { --fr; } @@ -1536,19 +1609,25 @@ MemoryRegionSection memory_region_find(MemoryRegion *mr, ret.offset_within_region = fr->offset_in_region; ret.offset_within_region += int128_get64(int128_sub(range.start, fr->addr.start)); - ret.size = int128_get64(range.size); + ret.size = range.size; ret.offset_within_address_space = int128_get64(range.start); ret.readonly = fr->readonly; + memory_region_ref(ret.mr); + + flatview_unref(view); return ret; } void address_space_sync_dirty_bitmap(AddressSpace *as) { + FlatView *view; FlatRange *fr; - FOR_EACH_FLAT_RANGE(fr, as->current_map) { + 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) @@ -1566,6 +1645,7 @@ void memory_global_dirty_log_stop(void) static void listener_add_address_space(MemoryListener *listener, AddressSpace *as) { + FlatView *view; FlatRange *fr; if (listener->address_space_filter @@ -1579,12 +1659,13 @@ static void listener_add_address_space(MemoryListener *listener, } } - FOR_EACH_FLAT_RANGE(fr, as->current_map) { + 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 = int128_get64(fr->addr.size), + .size = fr->addr.size, .offset_within_address_space = int128_get64(fr->addr.start), .readonly = fr->readonly, }; @@ -1592,6 +1673,7 @@ static void listener_add_address_space(MemoryListener *listener, listener->region_add(listener, §ion); } } + flatview_unref(view); } void memory_listener_register(MemoryListener *listener, AddressSpace *filter) @@ -1623,8 +1705,12 @@ void memory_listener_unregister(MemoryListener *listener) QTAILQ_REMOVE(&memory_listeners, listener, link); } -void address_space_init(AddressSpace *as, MemoryRegion *root) +void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name) { + if (QTAILQ_EMPTY(&address_spaces)) { + memory_init(); + } + memory_region_transaction_begin(); as->root = root; as->current_map = g_new(FlatView, 1); @@ -1632,7 +1718,7 @@ void address_space_init(AddressSpace *as, MemoryRegion *root) as->ioeventfd_nb = 0; as->ioeventfds = NULL; QTAILQ_INSERT_TAIL(&address_spaces, as, address_spaces_link); - as->name = NULL; + as->name = g_strdup(name ? name : "anonymous"); address_space_init_dispatch(as); memory_region_update_pending |= root->enabled; memory_region_transaction_commit(); @@ -1646,8 +1732,8 @@ void address_space_destroy(AddressSpace *as) memory_region_transaction_commit(); QTAILQ_REMOVE(&address_spaces, as, address_spaces_link); address_space_destroy_dispatch(as); - flatview_destroy(as->current_map); - g_free(as->current_map); + flatview_unref(as->current_map); + g_free(as->name); g_free(as->ioeventfds); } @@ -1712,7 +1798,9 @@ static void mtree_print_mr(fprintf_function mon_printf, void *f, "-" TARGET_FMT_plx "\n", base + mr->addr, base + mr->addr - + (hwaddr)int128_get64(mr->size) - 1, + + (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' @@ -1721,13 +1809,17 @@ static void mtree_print_mr(fprintf_function mon_printf, void *f, mr->alias->name, mr->alias_offset, mr->alias_offset - + (hwaddr)int128_get64(mr->size) - 1); + + (int128_nz(mr->size) ? + (hwaddr)int128_get64(int128_sub(mr->size, + int128_one())) : 0)); } else { mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx " (prio %d, %c%c): %s\n", base + mr->addr, base + mr->addr - + (hwaddr)int128_get64(mr->size) - 1, + + (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' @@ -1773,9 +1865,6 @@ void mtree_info(fprintf_function mon_printf, void *f) QTAILQ_INIT(&ml_head); QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) { - if (!as->name) { - continue; - } mon_printf(f, "%s\n", as->name); mtree_print_mr(mon_printf, f, as->root, 0, 0, &ml_head); }