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memory: move ioeventfd ops to MemoryListener 

This way the accelerator (kvm) can handle them directly.

Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Avi Kivity 2012-02-08 16:39:06 +02:00
parent 0e0d36b446
commit 80a1ea3748
5 changed files with 128 additions and 56 deletions
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14
hw/vhost.c
View File

@ -720,6 +720,18 @@ static void vhost_virtqueue_cleanup(struct vhost_dev *dev,
0, virtio_queue_get_desc_size(vdev, idx));
}
static void vhost_eventfd_add(MemoryListener *listener,
MemoryRegionSection *section,
bool match_data, uint64_t data, int fd)
{
}
static void vhost_eventfd_del(MemoryListener *listener,
MemoryRegionSection *section,
bool match_data, uint64_t data, int fd)
{
}
int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force)
{
uint64_t features;
@ -751,6 +763,8 @@ int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force)
.log_sync = vhost_log_sync,
.log_global_start = vhost_log_global_start,
.log_global_stop = vhost_log_global_stop,
.eventfd_add = vhost_eventfd_add,
.eventfd_del = vhost_eventfd_del,
.priority = 10
};
hdev->mem = g_malloc0(offsetof(struct vhost_memory, regions));

78
kvm-all.c
View File

@ -28,6 +28,7 @@
#include "kvm.h"
#include "bswap.h"
#include "memory.h"
#include "exec-memory.h"
/* This check must be after config-host.h is included */
#ifdef CONFIG_EVENTFD
@ -718,6 +719,81 @@ static void kvm_log_global_stop(struct MemoryListener *listener)
assert(r >= 0);
}
static void kvm_mem_ioeventfd_add(MemoryRegionSection *section,
bool match_data, uint64_t data, int fd)
{
int r;
assert(match_data && section->size == 4);
r = kvm_set_ioeventfd_mmio_long(fd, section->offset_within_address_space,
data, true);
if (r < 0) {
abort();
}
}
static void kvm_mem_ioeventfd_del(MemoryRegionSection *section,
bool match_data, uint64_t data, int fd)
{
int r;
r = kvm_set_ioeventfd_mmio_long(fd, section->offset_within_address_space,
data, false);
if (r < 0) {
abort();
}
}
static void kvm_io_ioeventfd_add(MemoryRegionSection *section,
bool match_data, uint64_t data, int fd)
{
int r;
assert(match_data && section->size == 2);
r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space,
data, true);
if (r < 0) {
abort();
}
}
static void kvm_io_ioeventfd_del(MemoryRegionSection *section,
bool match_data, uint64_t data, int fd)
{
int r;
r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space,
data, false);
if (r < 0) {
abort();
}
}
static void kvm_eventfd_add(MemoryListener *listener,
MemoryRegionSection *section,
bool match_data, uint64_t data, int fd)
{
if (section->address_space == get_system_memory()) {
kvm_mem_ioeventfd_add(section, match_data, data, fd);
} else {
kvm_io_ioeventfd_add(section, match_data, data, fd);
}
}
static void kvm_eventfd_del(MemoryListener *listener,
MemoryRegionSection *section,
bool match_data, uint64_t data, int fd)
{
if (section->address_space == get_system_memory()) {
kvm_mem_ioeventfd_del(section, match_data, data, fd);
} else {
kvm_io_ioeventfd_del(section, match_data, data, fd);
}
}
static MemoryListener kvm_memory_listener = {
.region_add = kvm_region_add,
.region_del = kvm_region_del,
@ -726,6 +802,8 @@ static MemoryListener kvm_memory_listener = {
.log_sync = kvm_log_sync,
.log_global_start = kvm_log_global_start,
.log_global_stop = kvm_log_global_stop,
.eventfd_add = kvm_eventfd_add,
.eventfd_del = kvm_eventfd_del,
.priority = 10,
};

74
memory.c
View File

@ -202,8 +202,6 @@ 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) \
@ -369,37 +367,11 @@ static void as_memory_log_stop(AddressSpace *as, FlatRange *fr)
{
}
static void as_memory_ioeventfd_add(AddressSpace *as, MemoryRegionIoeventfd *fd)
{
int r;
assert(fd->match_data && int128_get64(fd->addr.size) == 4);
r = kvm_set_ioeventfd_mmio_long(fd->fd, int128_get64(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, int128_get64(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 = {
@ -493,35 +465,9 @@ static void as_io_range_del(AddressSpace *as, FlatRange *fr)
int128_get64(fr->addr.size));
}
static void as_io_ioeventfd_add(AddressSpace *as, MemoryRegionIoeventfd *fd)
{
int r;
assert(fd->match_data && int128_get64(fd->addr.size) == 2);
r = kvm_set_ioeventfd_pio_word(fd->fd, int128_get64(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, int128_get64(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 = {
@ -653,6 +599,8 @@ static void address_space_add_del_ioeventfds(AddressSpace *as,
unsigned fds_old_nb)
{
unsigned iold, inew;
MemoryRegionIoeventfd *fd;
MemoryRegionSection section;
/* Generate a symmetric difference of the old and new fd sets, adding
* and deleting as necessary.
@ -664,13 +612,27 @@ static void address_space_add_del_ioeventfds(AddressSpace *as,
&& (inew == fds_new_nb
|| memory_region_ioeventfd_before(fds_old[iold],
fds_new[inew]))) {
as->ops->ioeventfd_del(as, &fds_old[iold]);
fd = &fds_old[iold];
section = (MemoryRegionSection) {
.address_space = as->root,
.offset_within_address_space = int128_get64(fd->addr.start),
.size = int128_get64(fd->addr.size),
};
MEMORY_LISTENER_CALL(eventfd_del, Forward, &section,
fd->match_data, fd->data, fd->fd);
++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]);
fd = &fds_new[inew];
section = (MemoryRegionSection) {
.address_space = as->root,
.offset_within_address_space = int128_get64(fd->addr.start),
.size = int128_get64(fd->addr.size),
};
MEMORY_LISTENER_CALL(eventfd_add, Reverse, &section,
fd->match_data, fd->data, fd->fd);
++inew;
} else {
++iold;

4
memory.h
View File

@ -185,6 +185,10 @@ struct MemoryListener {
void (*log_sync)(MemoryListener *listener, MemoryRegionSection *section);
void (*log_global_start)(MemoryListener *listener);
void (*log_global_stop)(MemoryListener *listener);
void (*eventfd_add)(MemoryListener *listener, MemoryRegionSection *section,
bool match_data, uint64_t data, int fd);
void (*eventfd_del)(MemoryListener *listener, MemoryRegionSection *section,
bool match_data, uint64_t data, int fd);
/* Lower = earlier (during add), later (during del) */
unsigned priority;
QTAILQ_ENTRY(MemoryListener) link;

14
xen-all.c
View File

@ -487,6 +487,18 @@ static void xen_log_global_stop(MemoryListener *listener)
{
}
static void xen_eventfd_add(MemoryListener *listener,
MemoryRegionSection *section,
bool match_data, uint64_t data, int fd)
{
}
static void xen_eventfd_del(MemoryListener *listener,
MemoryRegionSection *section,
bool match_data, uint64_t data, int fd)
{
}
static MemoryListener xen_memory_listener = {
.region_add = xen_region_add,
.region_del = xen_region_del,
@ -495,6 +507,8 @@ static MemoryListener xen_memory_listener = {
.log_sync = xen_log_sync,
.log_global_start = xen_log_global_start,
.log_global_stop = xen_log_global_stop,
.eventfd_add = xen_eventfd_add,
.eventfd_del = xen_eventfd_del,
.priority = 10,
};