#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 {
- uint64_t start;
- uint64_t size;
+ int64_t start;
+ int64_t size;
};
-static AddrRange addrrange_make(uint64_t start, uint64_t size)
+static AddrRange addrrange_make(int64_t start, int64_t size)
{
return (AddrRange) { start, size };
}
return r1.start == r2.start && r1.size == r2.size;
}
-static uint64_t addrrange_end(AddrRange r)
+static int64_t addrrange_end(AddrRange r)
{
return r.start + r.size;
}
static AddrRange addrrange_intersection(AddrRange r1, AddrRange r2)
{
- uint64_t start = MAX(r1.start, r2.start);
+ int64_t start = MAX(r1.start, r2.start);
/* off-by-one arithmetic to prevent overflow */
- uint64_t end = MIN(addrrange_end(r1) - 1, addrrange_end(r2) - 1);
+ int64_t end = MIN(addrrange_end(r1) - 1, addrrange_end(r2) - 1);
return addrrange_make(start, end - start + 1);
}
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;
const AddressSpaceOps *ops;
MemoryRegion *root;
FlatView current_map;
+ int ioeventfd_nb;
+ MemoryRegionIoeventfd *ioeventfds;
};
struct AddressSpaceOps {
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) \
}
}
+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
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);
}
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 - mrp->offset);
+ }
+ return;
+ }
+ *data = mr->ops->read(mr->opaque, offset, width);
+}
+
+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 - mrp->offset, data);
+ }
+ return;
+ }
+ mr->ops->write(mr->opaque, offset, data, width);
+}
+
+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.
*/
MemoryRegion *subregion;
unsigned i;
target_phys_addr_t offset_in_region;
- uint64_t remain;
- uint64_t now;
+ int64_t remain;
+ int64_t now;
FlatRange fr;
AddrRange tmp;
flatview_init(&view);
- render_memory_region(&view, mr, 0, addrrange_make(0, UINT64_MAX));
+ render_memory_region(&view, mr, 0, addrrange_make(0, INT64_MAX));
flatview_simplify(&view);
return view;
}
-static void address_space_update_topology(AddressSpace *as)
+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 = qemu_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);
+
+ qemu_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)
{
- FlatView old_view = as->current_map;
- FlatView new_view = generate_memory_topology(as->root);
unsigned iold, inew;
FlatRange *frold, *frnew;
&& !flatrange_equal(frold, frnew)))) {
/* In old, but (not in new, or in new but attributes changed). */
- as->ops->range_del(as, frold);
+ if (!adding) {
+ as->ops->range_del(as, frold);
+ }
+
++iold;
} else if (frold && frnew && flatrange_equal(frold, frnew)) {
/* In both (logging may have changed) */
- 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);
+ 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;
} else {
/* In new */
- as->ops->range_add(as, frnew);
+ 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)
{
- address_space_update_topology(&address_space_memory);
+ 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();
}
void memory_region_init(MemoryRegion *mr,
QTAILQ_INIT(&mr->coalesced);
mr->name = qemu_strdup(name);
mr->dirty_log_mask = 0;
+ mr->ioeventfd_nb = 0;
+ mr->ioeventfds = NULL;
}
static bool memory_region_access_valid(MemoryRegion *mr,
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_size_min = mr->ops->impl.min_access_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_size_min = mr->ops->impl.min_access_size;
memory_region_write_thunk_l,
};
+static void memory_region_prepare_ram_addr(MemoryRegion *mr)
+{
+ if (mr->backend_registered) {
+ return;
+ }
+
+ 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,
mr->ops = ops;
mr->opaque = opaque;
mr->terminates = true;
- mr->ram_addr = cpu_register_io_memory(memory_region_read_thunk,
- memory_region_write_thunk,
- mr,
- mr->ops->endianness);
+ mr->backend_registered = false;
}
void memory_region_init_ram(MemoryRegion *mr,
memory_region_init(mr, name, size);
mr->terminates = true;
mr->ram_addr = qemu_ram_alloc(dev, name, size);
+ mr->backend_registered = true;
}
void memory_region_init_ram_ptr(MemoryRegion *mr,
memory_region_init(mr, name, size);
mr->terminates = true;
mr->ram_addr = qemu_ram_alloc_from_ptr(dev, name, size, ptr);
+ mr->backend_registered = true;
}
void memory_region_init_alias(MemoryRegion *mr,
assert(QTAILQ_EMPTY(&mr->subregions));
memory_region_clear_coalescing(mr);
qemu_free((char *)mr->name);
+ qemu_free(mr->ioeventfds);
}
uint64_t memory_region_size(MemoryRegion *mr)
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 = qemu_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 = qemu_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)
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();
+}
projects / qemu.git / blobdiff