| /* |
| * 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. |
| * |
| */ |
| |
| #include "memory.h" |
| #include "exec-memory.h" |
| #include "ioport.h" |
| #include "bitops.h" |
| #include "kvm.h" |
| #include <assert.h> |
| |
| unsigned memory_region_transaction_depth = 0; |
| |
| typedef struct AddrRange AddrRange; |
| |
| /* |
| * Note using signed integers limits us to physical addresses at most |
| * 63 bits wide. They are needed for negative offsetting in aliases |
| * (large MemoryRegion::alias_offset). |
| */ |
| struct AddrRange { |
| int64_t start; |
| int64_t size; |
| }; |
| |
| static AddrRange addrrange_make(int64_t start, int64_t size) |
| { |
| return (AddrRange) { start, size }; |
| } |
| |
| static bool addrrange_equal(AddrRange r1, AddrRange r2) |
| { |
| return r1.start == r2.start && r1.size == r2.size; |
| } |
| |
| static int64_t addrrange_end(AddrRange r) |
| { |
| return r.start + r.size; |
| } |
| |
| static AddrRange addrrange_shift(AddrRange range, int64_t delta) |
| { |
| range.start += delta; |
| return range; |
| } |
| |
| static bool addrrange_intersects(AddrRange r1, AddrRange r2) |
| { |
| return (r1.start >= r2.start && (r1.start - r2.start) < r2.size) |
| || (r2.start >= r1.start && (r2.start - r1.start) < r1.size); |
| } |
| |
| static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2) |
| { |
| int64_t start = MAX(r1.start, r2.start); |
| /* off-by-one arithmetic to prevent overflow */ |
| int64_t end = MIN(addrrange_end(r1) - 1, addrrange_end(r2) - 1); |
| return addrrange_make(start, end - start + 1); |
| } |
| |
| struct CoalescedMemoryRange { |
| AddrRange addr; |
| QTAILQ_ENTRY(CoalescedMemoryRange) link; |
| }; |
| |
| struct MemoryRegionIoeventfd { |
| AddrRange addr; |
| bool match_data; |
| uint64_t data; |
| int fd; |
| }; |
| |
| static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a, |
| MemoryRegionIoeventfd b) |
| { |
| if (a.addr.start < b.addr.start) { |
| return true; |
| } else if (a.addr.start > b.addr.start) { |
| return false; |
| } else if (a.addr.size < b.addr.size) { |
| return true; |
| } else if (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.fd < b.fd) { |
| return true; |
| } else if (a.fd > b.fd) { |
| 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; |
| target_phys_addr_t offset_in_region; |
| AddrRange addr; |
| uint8_t dirty_log_mask; |
| bool readable; |
| }; |
| |
| /* Flattened global view of current active memory hierarchy. Kept in sorted |
| * order. |
| */ |
| struct FlatView { |
| FlatRange *ranges; |
| unsigned nr; |
| unsigned nr_allocated; |
| }; |
| |
| typedef struct AddressSpace AddressSpace; |
| typedef struct AddressSpaceOps AddressSpaceOps; |
| |
| /* A system address space - I/O, memory, etc. */ |
| struct AddressSpace { |
| const AddressSpaceOps *ops; |
| MemoryRegion *root; |
| FlatView current_map; |
| int ioeventfd_nb; |
| MemoryRegionIoeventfd *ioeventfds; |
| }; |
| |
| struct AddressSpaceOps { |
| void (*range_add)(AddressSpace *as, FlatRange *fr); |
| void (*range_del)(AddressSpace *as, FlatRange *fr); |
| void (*log_start)(AddressSpace *as, FlatRange *fr); |
| void (*log_stop)(AddressSpace *as, FlatRange *fr); |
| void (*ioeventfd_add)(AddressSpace *as, MemoryRegionIoeventfd *fd); |
| void (*ioeventfd_del)(AddressSpace *as, MemoryRegionIoeventfd *fd); |
| }; |
| |
| #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->readable == b->readable; |
| } |
| |
| static void flatview_init(FlatView *view) |
| { |
| 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; |
| ++view->nr; |
| } |
| |
| static void flatview_destroy(FlatView *view) |
| { |
| g_free(view->ranges); |
| } |
| |
| static bool can_merge(FlatRange *r1, FlatRange *r2) |
| { |
| return addrrange_end(r1->addr) == r2->addr.start |
| && r1->mr == r2->mr |
| && r1->offset_in_region + r1->addr.size == r2->offset_in_region |
| && r1->dirty_log_mask == r2->dirty_log_mask |
| && r1->readable == r2->readable; |
| } |
| |
| /* Attempt to simplify a view by merging ajacent 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])) { |
| 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 void memory_region_read_accessor(void *opaque, |
| target_phys_addr_t addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned shift, |
| uint64_t mask) |
| { |
| MemoryRegion *mr = opaque; |
| uint64_t tmp; |
| |
| tmp = mr->ops->read(mr->opaque, addr, size); |
| *value |= (tmp & mask) << shift; |
| } |
| |
| static void memory_region_write_accessor(void *opaque, |
| target_phys_addr_t addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned shift, |
| uint64_t mask) |
| { |
| MemoryRegion *mr = opaque; |
| uint64_t tmp; |
| |
| tmp = (*value >> shift) & mask; |
| mr->ops->write(mr->opaque, addr, tmp, size); |
| } |
| |
| static void access_with_adjusted_size(target_phys_addr_t addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned access_size_min, |
| unsigned access_size_max, |
| void (*access)(void *opaque, |
| target_phys_addr_t addr, |
| uint64_t *value, |
| unsigned size, |
| unsigned shift, |
| uint64_t mask), |
| void *opaque) |
| { |
| uint64_t access_mask; |
| unsigned access_size; |
| unsigned i; |
| |
| if (!access_size_min) { |
| access_size_min = 1; |
| } |
| if (!access_size_max) { |
| access_size_max = 4; |
| } |
| 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) { |
| /* FIXME: big-endian support */ |
| access(opaque, addr + i, value, access_size, i * 8, access_mask); |
| } |
| } |
| |
| static void memory_region_prepare_ram_addr(MemoryRegion *mr); |
| |
| static void as_memory_range_add(AddressSpace *as, FlatRange *fr) |
| { |
| ram_addr_t phys_offset, region_offset; |
| |
| memory_region_prepare_ram_addr(fr->mr); |
| |
| phys_offset = fr->mr->ram_addr; |
| region_offset = fr->offset_in_region; |
| /* cpu_register_physical_memory_log() wants region_offset for |
| * mmio, but prefers offseting phys_offset for RAM. Humour it. |
| */ |
| if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM) { |
| phys_offset += region_offset; |
| region_offset = 0; |
| } |
| |
| if (!fr->readable) { |
| phys_offset &= ~TARGET_PAGE_MASK & ~IO_MEM_ROMD; |
| } |
| |
| cpu_register_physical_memory_log(fr->addr.start, |
| fr->addr.size, |
| phys_offset, |
| region_offset, |
| fr->dirty_log_mask); |
| } |
| |
| static void as_memory_range_del(AddressSpace *as, FlatRange *fr) |
| { |
| if (fr->dirty_log_mask) { |
| cpu_physical_sync_dirty_bitmap(fr->addr.start, |
| fr->addr.start + fr->addr.size); |
| } |
| cpu_register_physical_memory(fr->addr.start, fr->addr.size, |
| IO_MEM_UNASSIGNED); |
| } |
| |
| static void as_memory_log_start(AddressSpace *as, FlatRange *fr) |
| { |
| cpu_physical_log_start(fr->addr.start, fr->addr.size); |
| } |
| |
| static void as_memory_log_stop(AddressSpace *as, FlatRange *fr) |
| { |
| cpu_physical_log_stop(fr->addr.start, fr->addr.size); |
| } |
| |
| static void as_memory_ioeventfd_add(AddressSpace *as, MemoryRegionIoeventfd *fd) |
| { |
| int r; |
| |
| assert(fd->match_data && fd->addr.size == 4); |
| |
| r = kvm_set_ioeventfd_mmio_long(fd->fd, fd->addr.start, fd->data, true); |
| if (r < 0) { |
| abort(); |
| } |
| } |
| |
| static void as_memory_ioeventfd_del(AddressSpace *as, MemoryRegionIoeventfd *fd) |
| { |
| int r; |
| |
| r = kvm_set_ioeventfd_mmio_long(fd->fd, fd->addr.start, fd->data, false); |
| if (r < 0) { |
| abort(); |
| } |
| } |
| |
| static const AddressSpaceOps address_space_ops_memory = { |
| .range_add = as_memory_range_add, |
| .range_del = as_memory_range_del, |
| .log_start = as_memory_log_start, |
| .log_stop = as_memory_log_stop, |
| .ioeventfd_add = as_memory_ioeventfd_add, |
| .ioeventfd_del = as_memory_ioeventfd_del, |
| }; |
| |
| static AddressSpace address_space_memory = { |
| .ops = &address_space_ops_memory, |
| }; |
| |
| 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; |
| } |
| } |
| return NULL; |
| } |
| |
| static void memory_region_iorange_read(IORange *iorange, |
| uint64_t offset, |
| unsigned width, |
| uint64_t *data) |
| { |
| MemoryRegion *mr = container_of(iorange, MemoryRegion, iorange); |
| |
| if (mr->ops->old_portio) { |
| const MemoryRegionPortio *mrp = find_portio(mr, offset, width, false); |
| |
| *data = ((uint64_t)1 << (width * 8)) - 1; |
| if (mrp) { |
| *data = mrp->read(mr->opaque, offset); |
| } |
| 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) |
| { |
| MemoryRegion *mr = container_of(iorange, MemoryRegion, iorange); |
| |
| if (mr->ops->old_portio) { |
| const MemoryRegionPortio *mrp = find_portio(mr, offset, width, true); |
| |
| if (mrp) { |
| mrp->write(mr->opaque, offset, data); |
| } |
| 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 const IORangeOps memory_region_iorange_ops = { |
| .read = memory_region_iorange_read, |
| .write = memory_region_iorange_write, |
| }; |
| |
| static void as_io_range_add(AddressSpace *as, FlatRange *fr) |
| { |
| iorange_init(&fr->mr->iorange, &memory_region_iorange_ops, |
| fr->addr.start,fr->addr.size); |
| ioport_register(&fr->mr->iorange); |
| } |
| |
| static void as_io_range_del(AddressSpace *as, FlatRange *fr) |
| { |
| isa_unassign_ioport(fr->addr.start, fr->addr.size); |
| } |
| |
| static void as_io_ioeventfd_add(AddressSpace *as, MemoryRegionIoeventfd *fd) |
| { |
| int r; |
| |
| assert(fd->match_data && fd->addr.size == 2); |
| |
| r = kvm_set_ioeventfd_pio_word(fd->fd, fd->addr.start, fd->data, true); |
| if (r < 0) { |
| abort(); |
| } |
| } |
| |
| static void as_io_ioeventfd_del(AddressSpace *as, MemoryRegionIoeventfd *fd) |
| { |
| int r; |
| |
| r = kvm_set_ioeventfd_pio_word(fd->fd, fd->addr.start, fd->data, false); |
| if (r < 0) { |
| abort(); |
| } |
| } |
| |
| static const AddressSpaceOps address_space_ops_io = { |
| .range_add = as_io_range_add, |
| .range_del = as_io_range_del, |
| .ioeventfd_add = as_io_ioeventfd_add, |
| .ioeventfd_del = as_io_ioeventfd_del, |
| }; |
| |
| static AddressSpace address_space_io = { |
| .ops = &address_space_ops_io, |
| }; |
| |
| /* Render a memory region into the global view. Ranges in @view obscure |
| * ranges in @mr. |
| */ |
| static void render_memory_region(FlatView *view, |
| MemoryRegion *mr, |
| target_phys_addr_t base, |
| AddrRange clip) |
| { |
| MemoryRegion *subregion; |
| unsigned i; |
| target_phys_addr_t offset_in_region; |
| int64_t remain; |
| int64_t now; |
| FlatRange fr; |
| AddrRange tmp; |
| |
| base += mr->addr; |
| |
| tmp = addrrange_make(base, mr->size); |
| |
| if (!addrrange_intersects(tmp, clip)) { |
| return; |
| } |
| |
| clip = addrrange_intersection(tmp, clip); |
| |
| if (mr->alias) { |
| base -= mr->alias->addr; |
| base -= mr->alias_offset; |
| render_memory_region(view, mr->alias, base, clip); |
| return; |
| } |
| |
| /* Render subregions in priority order. */ |
| QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) { |
| render_memory_region(view, subregion, base, clip); |
| } |
| |
| if (!mr->terminates) { |
| return; |
| } |
| |
| offset_in_region = clip.start - base; |
| base = clip.start; |
| remain = clip.size; |
| |
| /* Render the region itself into any gaps left by the current view. */ |
| for (i = 0; i < view->nr && remain; ++i) { |
| if (base >= addrrange_end(view->ranges[i].addr)) { |
| continue; |
| } |
| if (base < view->ranges[i].addr.start) { |
| now = MIN(remain, 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.readable = mr->readable; |
| flatview_insert(view, i, &fr); |
| ++i; |
| base += now; |
| offset_in_region += now; |
| remain -= now; |
| } |
| if (base == view->ranges[i].addr.start) { |
| now = MIN(remain, view->ranges[i].addr.size); |
| base += now; |
| offset_in_region += now; |
| remain -= now; |
| } |
| } |
| if (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.readable = mr->readable; |
| 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; |
| |
| flatview_init(&view); |
| |
| render_memory_region(&view, mr, 0, addrrange_make(0, INT64_MAX)); |
| 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; |
| |
| /* 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]))) { |
| as->ops->ioeventfd_del(as, &fds_old[iold]); |
| ++iold; |
| } else if (inew < fds_new_nb |
| && (iold == fds_old_nb |
| || memory_region_ioeventfd_before(fds_new[inew], |
| fds_old[iold]))) { |
| as->ops->ioeventfd_add(as, &fds_new[inew]); |
| ++inew; |
| } else { |
| ++iold; |
| ++inew; |
| } |
| } |
| } |
| |
| static void address_space_update_ioeventfds(AddressSpace *as) |
| { |
| FlatRange *fr; |
| unsigned ioeventfd_nb = 0; |
| MemoryRegionIoeventfd *ioeventfds = NULL; |
| AddrRange tmp; |
| unsigned i; |
| |
| FOR_EACH_FLAT_RANGE(fr, &as->current_map) { |
| for (i = 0; i < fr->mr->ioeventfd_nb; ++i) { |
| tmp = addrrange_shift(fr->mr->ioeventfds[i].addr, |
| fr->addr.start - 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; |
| } |
| |
| static void address_space_update_topology_pass(AddressSpace *as, |
| FlatView old_view, |
| 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 |
| || frold->addr.start < frnew->addr.start |
| || (frold->addr.start == frnew->addr.start |
| && !flatrange_equal(frold, frnew)))) { |
| /* In old, but (not in new, or in new but attributes changed). */ |
| |
| if (!adding) { |
| as->ops->range_del(as, frold); |
| } |
| |
| ++iold; |
| } else if (frold && frnew && flatrange_equal(frold, frnew)) { |
| /* In both (logging may have changed) */ |
| |
| if (adding) { |
| if (frold->dirty_log_mask && !frnew->dirty_log_mask) { |
| as->ops->log_stop(as, frnew); |
| } else if (frnew->dirty_log_mask && !frold->dirty_log_mask) { |
| as->ops->log_start(as, frnew); |
| } |
| } |
| |
| ++iold; |
| ++inew; |
| } else { |
| /* In new */ |
| |
| if (adding) { |
| as->ops->range_add(as, frnew); |
| } |
| |
| ++inew; |
| } |
| } |
| } |
| |
| |
| static void address_space_update_topology(AddressSpace *as) |
| { |
| FlatView old_view = as->current_map; |
| 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); |
| address_space_update_ioeventfds(as); |
| } |
| |
| static void memory_region_update_topology(void) |
| { |
| if (memory_region_transaction_depth) { |
| return; |
| } |
| |
| if (address_space_memory.root) { |
| address_space_update_topology(&address_space_memory); |
| } |
| if (address_space_io.root) { |
| address_space_update_topology(&address_space_io); |
| } |
| } |
| |
| void memory_region_transaction_begin(void) |
| { |
| ++memory_region_transaction_depth; |
| } |
| |
| void memory_region_transaction_commit(void) |
| { |
| assert(memory_region_transaction_depth); |
| --memory_region_transaction_depth; |
| memory_region_update_topology(); |
| } |
| |
| 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_ram_from_ptr(MemoryRegion *mr) |
| { |
| qemu_ram_free_from_ptr(mr->ram_addr); |
| } |
| |
| static void memory_region_destructor_iomem(MemoryRegion *mr) |
| { |
| cpu_unregister_io_memory(mr->ram_addr); |
| } |
| |
| static void memory_region_destructor_rom_device(MemoryRegion *mr) |
| { |
| qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK); |
| cpu_unregister_io_memory(mr->ram_addr & ~(TARGET_PAGE_MASK | IO_MEM_ROMD)); |
| } |
| |
| void memory_region_init(MemoryRegion *mr, |
| const char *name, |
| uint64_t size) |
| { |
| mr->ops = NULL; |
| mr->parent = NULL; |
| mr->size = size; |
| mr->addr = 0; |
| mr->offset = 0; |
| mr->terminates = false; |
| mr->readable = true; |
| mr->destructor = memory_region_destructor_none; |
| mr->priority = 0; |
| mr->may_overlap = false; |
| mr->alias = NULL; |
| QTAILQ_INIT(&mr->subregions); |
| memset(&mr->subregions_link, 0, sizeof mr->subregions_link); |
| QTAILQ_INIT(&mr->coalesced); |
| mr->name = g_strdup(name); |
| mr->dirty_log_mask = 0; |
| mr->ioeventfd_nb = 0; |
| mr->ioeventfds = NULL; |
| } |
| |
| static bool memory_region_access_valid(MemoryRegion *mr, |
| target_phys_addr_t addr, |
| unsigned size) |
| { |
| if (!mr->ops->valid.unaligned && (addr & (size - 1))) { |
| return false; |
| } |
| |
| /* Treat zero as compatibility all valid */ |
| if (!mr->ops->valid.max_access_size) { |
| return true; |
| } |
| |
| if (size > mr->ops->valid.max_access_size |
| || size < mr->ops->valid.min_access_size) { |
| return false; |
| } |
| return true; |
| } |
| |
| static uint32_t memory_region_read_thunk_n(void *_mr, |
| target_phys_addr_t addr, |
| unsigned size) |
| { |
| MemoryRegion *mr = _mr; |
| uint64_t data = 0; |
| |
| if (!memory_region_access_valid(mr, addr, size)) { |
| return -1U; /* FIXME: better signalling */ |
| } |
| |
| if (!mr->ops->read) { |
| return mr->ops->old_mmio.read[bitops_ffsl(size)](mr->opaque, addr); |
| } |
| |
| /* FIXME: support unaligned access */ |
| access_with_adjusted_size(addr + mr->offset, &data, size, |
| mr->ops->impl.min_access_size, |
| mr->ops->impl.max_access_size, |
| memory_region_read_accessor, mr); |
| |
| return data; |
| } |
| |
| static void memory_region_write_thunk_n(void *_mr, |
| target_phys_addr_t addr, |
| unsigned size, |
| uint64_t data) |
| { |
| MemoryRegion *mr = _mr; |
| |
| if (!memory_region_access_valid(mr, addr, size)) { |
| return; /* FIXME: better signalling */ |
| } |
| |
| if (!mr->ops->write) { |
| mr->ops->old_mmio.write[bitops_ffsl(size)](mr->opaque, addr, data); |
| return; |
| } |
| |
| /* FIXME: support unaligned access */ |
| access_with_adjusted_size(addr + mr->offset, &data, size, |
| mr->ops->impl.min_access_size, |
| mr->ops->impl.max_access_size, |
| memory_region_write_accessor, mr); |
| } |
| |
| static uint32_t memory_region_read_thunk_b(void *mr, target_phys_addr_t addr) |
| { |
| return memory_region_read_thunk_n(mr, addr, 1); |
| } |
| |
| static uint32_t memory_region_read_thunk_w(void *mr, target_phys_addr_t addr) |
| { |
| return memory_region_read_thunk_n(mr, addr, 2); |
| } |
| |
| static uint32_t memory_region_read_thunk_l(void *mr, target_phys_addr_t addr) |
| { |
| return memory_region_read_thunk_n(mr, addr, 4); |
| } |
| |
| static void memory_region_write_thunk_b(void *mr, target_phys_addr_t addr, |
| uint32_t data) |
| { |
| memory_region_write_thunk_n(mr, addr, 1, data); |
| } |
| |
| static void memory_region_write_thunk_w(void *mr, target_phys_addr_t addr, |
| uint32_t data) |
| { |
| memory_region_write_thunk_n(mr, addr, 2, data); |
| } |
| |
| static void memory_region_write_thunk_l(void *mr, target_phys_addr_t addr, |
| uint32_t data) |
| { |
| memory_region_write_thunk_n(mr, addr, 4, data); |
| } |
| |
| static CPUReadMemoryFunc * const memory_region_read_thunk[] = { |
| memory_region_read_thunk_b, |
| memory_region_read_thunk_w, |
| memory_region_read_thunk_l, |
| }; |
| |
| static CPUWriteMemoryFunc * const memory_region_write_thunk[] = { |
| memory_region_write_thunk_b, |
| memory_region_write_thunk_w, |
| memory_region_write_thunk_l, |
| }; |
| |
| static void memory_region_prepare_ram_addr(MemoryRegion *mr) |
| { |
| if (mr->backend_registered) { |
| return; |
| } |
| |
| mr->destructor = memory_region_destructor_iomem; |
| mr->ram_addr = cpu_register_io_memory(memory_region_read_thunk, |
| memory_region_write_thunk, |
| mr, |
| mr->ops->endianness); |
| mr->backend_registered = true; |
| } |
| |
| void memory_region_init_io(MemoryRegion *mr, |
| const MemoryRegionOps *ops, |
| void *opaque, |
| const char *name, |
| uint64_t size) |
| { |
| memory_region_init(mr, name, size); |
| mr->ops = ops; |
| mr->opaque = opaque; |
| mr->terminates = true; |
| mr->backend_registered = false; |
| } |
| |
| void memory_region_init_ram(MemoryRegion *mr, |
| DeviceState *dev, |
| const char *name, |
| uint64_t size) |
| { |
| memory_region_init(mr, name, size); |
| mr->terminates = true; |
| mr->destructor = memory_region_destructor_ram; |
| mr->ram_addr = qemu_ram_alloc(dev, name, size); |
| mr->backend_registered = true; |
| } |
| |
| void memory_region_init_ram_ptr(MemoryRegion *mr, |
| DeviceState *dev, |
| const char *name, |
| uint64_t size, |
| void *ptr) |
| { |
| memory_region_init(mr, name, size); |
| mr->terminates = true; |
| mr->destructor = memory_region_destructor_ram_from_ptr; |
| mr->ram_addr = qemu_ram_alloc_from_ptr(dev, name, size, ptr); |
| mr->backend_registered = true; |
| } |
| |
| void memory_region_init_alias(MemoryRegion *mr, |
| const char *name, |
| MemoryRegion *orig, |
| target_phys_addr_t offset, |
| uint64_t size) |
| { |
| memory_region_init(mr, name, size); |
| mr->alias = orig; |
| mr->alias_offset = offset; |
| } |
| |
| void memory_region_init_rom_device(MemoryRegion *mr, |
| const MemoryRegionOps *ops, |
| void *opaque, |
| DeviceState *dev, |
| const char *name, |
| uint64_t size) |
| { |
| memory_region_init(mr, name, size); |
| mr->ops = ops; |
| mr->opaque = opaque; |
| mr->terminates = true; |
| mr->destructor = memory_region_destructor_rom_device; |
| mr->ram_addr = qemu_ram_alloc(dev, name, size); |
| mr->ram_addr |= cpu_register_io_memory(memory_region_read_thunk, |
| memory_region_write_thunk, |
| mr, |
| mr->ops->endianness); |
| mr->ram_addr |= IO_MEM_ROMD; |
| mr->backend_registered = true; |
| } |
| |
| void memory_region_destroy(MemoryRegion *mr) |
| { |
| assert(QTAILQ_EMPTY(&mr->subregions)); |
| mr->destructor(mr); |
| memory_region_clear_coalescing(mr); |
| g_free((char *)mr->name); |
| g_free(mr->ioeventfds); |
| } |
| |
| uint64_t memory_region_size(MemoryRegion *mr) |
| { |
| return mr->size; |
| } |
| |
| void memory_region_set_offset(MemoryRegion *mr, target_phys_addr_t offset) |
| { |
| mr->offset = offset; |
| } |
| |
| void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client) |
| { |
| uint8_t mask = 1 << client; |
| |
| mr->dirty_log_mask = (mr->dirty_log_mask & ~mask) | (log * mask); |
| memory_region_update_topology(); |
| } |
| |
| bool memory_region_get_dirty(MemoryRegion *mr, target_phys_addr_t addr, |
| unsigned client) |
| { |
| assert(mr->terminates); |
| return cpu_physical_memory_get_dirty(mr->ram_addr + addr, 1 << client); |
| } |
| |
| void memory_region_set_dirty(MemoryRegion *mr, target_phys_addr_t addr) |
| { |
| assert(mr->terminates); |
| return cpu_physical_memory_set_dirty(mr->ram_addr + addr); |
| } |
| |
| void memory_region_sync_dirty_bitmap(MemoryRegion *mr) |
| { |
| FlatRange *fr; |
| |
| FOR_EACH_FLAT_RANGE(fr, &address_space_memory.current_map) { |
| if (fr->mr == mr) { |
| cpu_physical_sync_dirty_bitmap(fr->addr.start, |
| fr->addr.start + fr->addr.size); |
| } |
| } |
| } |
| |
| void memory_region_set_readonly(MemoryRegion *mr, bool readonly) |
| { |
| /* FIXME */ |
| } |
| |
| void memory_region_rom_device_set_readable(MemoryRegion *mr, bool readable) |
| { |
| if (mr->readable != readable) { |
| mr->readable = readable; |
| memory_region_update_topology(); |
| } |
| } |
| |
| void memory_region_reset_dirty(MemoryRegion *mr, target_phys_addr_t addr, |
| target_phys_addr_t size, unsigned client) |
| { |
| assert(mr->terminates); |
| cpu_physical_memory_reset_dirty(mr->ram_addr + addr, |
| mr->ram_addr + addr + size, |
| 1 << client); |
| } |
| |
| void *memory_region_get_ram_ptr(MemoryRegion *mr) |
| { |
| if (mr->alias) { |
| return memory_region_get_ram_ptr(mr->alias) + mr->alias_offset; |
| } |
| |
| assert(mr->terminates); |
| |
| return qemu_get_ram_ptr(mr->ram_addr & TARGET_PAGE_MASK); |
| } |
| |
| static void memory_region_update_coalesced_range(MemoryRegion *mr) |
| { |
| FlatRange *fr; |
| CoalescedMemoryRange *cmr; |
| AddrRange tmp; |
| |
| FOR_EACH_FLAT_RANGE(fr, &address_space_memory.current_map) { |
| if (fr->mr == mr) { |
| qemu_unregister_coalesced_mmio(fr->addr.start, fr->addr.size); |
| QTAILQ_FOREACH(cmr, &mr->coalesced, link) { |
| tmp = addrrange_shift(cmr->addr, |
| fr->addr.start - fr->offset_in_region); |
| if (!addrrange_intersects(tmp, fr->addr)) { |
| continue; |
| } |
| tmp = addrrange_intersection(tmp, fr->addr); |
| qemu_register_coalesced_mmio(tmp.start, tmp.size); |
| } |
| } |
| } |
| } |
| |
| void memory_region_set_coalescing(MemoryRegion *mr) |
| { |
| memory_region_clear_coalescing(mr); |
| memory_region_add_coalescing(mr, 0, mr->size); |
| } |
| |
| void memory_region_add_coalescing(MemoryRegion *mr, |
| target_phys_addr_t offset, |
| uint64_t size) |
| { |
| CoalescedMemoryRange *cmr = g_malloc(sizeof(*cmr)); |
| |
| cmr->addr = addrrange_make(offset, size); |
| QTAILQ_INSERT_TAIL(&mr->coalesced, cmr, link); |
| memory_region_update_coalesced_range(mr); |
| } |
| |
| void memory_region_clear_coalescing(MemoryRegion *mr) |
| { |
| CoalescedMemoryRange *cmr; |
| |
| while (!QTAILQ_EMPTY(&mr->coalesced)) { |
| cmr = QTAILQ_FIRST(&mr->coalesced); |
| QTAILQ_REMOVE(&mr->coalesced, cmr, link); |
| g_free(cmr); |
| } |
| memory_region_update_coalesced_range(mr); |
| } |
| |
| void memory_region_add_eventfd(MemoryRegion *mr, |
| target_phys_addr_t addr, |
| unsigned size, |
| bool match_data, |
| uint64_t data, |
| int fd) |
| { |
| MemoryRegionIoeventfd mrfd = { |
| .addr.start = addr, |
| .addr.size = size, |
| .match_data = match_data, |
| .data = data, |
| .fd = fd, |
| }; |
| unsigned i; |
| |
| for (i = 0; i < mr->ioeventfd_nb; ++i) { |
| if (memory_region_ioeventfd_before(mrfd, mr->ioeventfds[i])) { |
| break; |
| } |
| } |
| ++mr->ioeventfd_nb; |
| mr->ioeventfds = g_realloc(mr->ioeventfds, |
| sizeof(*mr->ioeventfds) * mr->ioeventfd_nb); |
| memmove(&mr->ioeventfds[i+1], &mr->ioeventfds[i], |
| sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i)); |
| mr->ioeventfds[i] = mrfd; |
| memory_region_update_topology(); |
| } |
| |
| void memory_region_del_eventfd(MemoryRegion *mr, |
| target_phys_addr_t addr, |
| unsigned size, |
| bool match_data, |
| uint64_t data, |
| int fd) |
| { |
| MemoryRegionIoeventfd mrfd = { |
| .addr.start = addr, |
| .addr.size = size, |
| .match_data = match_data, |
| .data = data, |
| .fd = fd, |
| }; |
| unsigned i; |
| |
| for (i = 0; i < mr->ioeventfd_nb; ++i) { |
| if (memory_region_ioeventfd_equal(mrfd, mr->ioeventfds[i])) { |
| break; |
| } |
| } |
| assert(i != mr->ioeventfd_nb); |
| memmove(&mr->ioeventfds[i], &mr->ioeventfds[i+1], |
| sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb - (i+1))); |
| --mr->ioeventfd_nb; |
| mr->ioeventfds = g_realloc(mr->ioeventfds, |
| sizeof(*mr->ioeventfds)*mr->ioeventfd_nb + 1); |
| memory_region_update_topology(); |
| } |
| |
| static void memory_region_add_subregion_common(MemoryRegion *mr, |
| target_phys_addr_t offset, |
| MemoryRegion *subregion) |
| { |
| MemoryRegion *other; |
| |
| assert(!subregion->parent); |
| subregion->parent = mr; |
| subregion->addr = offset; |
| QTAILQ_FOREACH(other, &mr->subregions, subregions_link) { |
| if (subregion->may_overlap || other->may_overlap) { |
| continue; |
| } |
| if (offset >= other->offset + other->size |
| || offset + subregion->size <= other->offset) { |
| continue; |
| } |
| #if 0 |
| printf("warning: subregion collision %llx/%llx vs %llx/%llx\n", |
| (unsigned long long)offset, |
| (unsigned long long)subregion->size, |
| (unsigned long long)other->offset, |
| (unsigned long long)other->size); |
| #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_topology(); |
| } |
| |
| |
| void memory_region_add_subregion(MemoryRegion *mr, |
| target_phys_addr_t 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, |
| target_phys_addr_t offset, |
| MemoryRegion *subregion, |
| unsigned priority) |
| { |
| subregion->may_overlap = true; |
| subregion->priority = priority; |
| memory_region_add_subregion_common(mr, offset, subregion); |
| } |
| |
| void memory_region_del_subregion(MemoryRegion *mr, |
| MemoryRegion *subregion) |
| { |
| assert(subregion->parent == mr); |
| subregion->parent = NULL; |
| QTAILQ_REMOVE(&mr->subregions, subregion, subregions_link); |
| memory_region_update_topology(); |
| } |
| |
| void set_system_memory_map(MemoryRegion *mr) |
| { |
| address_space_memory.root = mr; |
| memory_region_update_topology(); |
| } |
| |
| void set_system_io_map(MemoryRegion *mr) |
| { |
| address_space_io.root = mr; |
| memory_region_update_topology(); |
| } |
