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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 14/23] vhost: convert to MemoryListener API
Drop the use of cpu_register_phys_memory_client() in favour of the new
MemoryListener API. The new API simplifies the caller, since there is no
need to deal with splitting and merging slots; however this is not exploited
in this patch.
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
hw/vhost.c | 126 ++++++++++++++++++++++++++++++++++++++++++++---------------
hw/vhost.h | 3 +-
2 files changed, 96 insertions(+), 33 deletions(-)
diff --git a/hw/vhost.c b/hw/vhost.c
index 0870cb7..a1c5e4c 100644
--- a/hw/vhost.c
+++ b/hw/vhost.c
@@ -57,12 +57,12 @@ static void vhost_dev_sync_region(struct vhost_dev *dev,
}
}
-static int vhost_client_sync_dirty_bitmap(CPUPhysMemoryClient *client,
- target_phys_addr_t start_addr,
- target_phys_addr_t end_addr)
+static int vhost_sync_dirty_bitmap(struct vhost_dev *dev,
+ target_phys_addr_t start_addr,
+ target_phys_addr_t end_addr)
{
- struct vhost_dev *dev = container_of(client, struct vhost_dev, client);
int i;
+
if (!dev->log_enabled || !dev->started) {
return 0;
}
@@ -81,6 +81,17 @@ static int
vhost_client_sync_dirty_bitmap(CPUPhysMemoryClient *client,
return 0;
}
+static void vhost_log_sync(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ struct vhost_dev *dev = container_of(listener, struct vhost_dev,
+ memory_listener);
+ target_phys_addr_t start_addr = section->offset_within_address_space;
+ target_phys_addr_t end_addr = start_addr + section->size;
+
+ vhost_sync_dirty_bitmap(dev, start_addr, end_addr);
+}
+
/* Assign/unassign. Keep an unsorted array of non-overlapping
* memory regions in dev->mem. */
static void vhost_dev_unassign_memory(struct vhost_dev *dev,
@@ -259,8 +270,7 @@ static inline void vhost_dev_log_resize(struct vhost_dev*
dev, uint64_t size)
log_base = (uint64_t)(unsigned long)log;
r = ioctl(dev->control, VHOST_SET_LOG_BASE, &log_base);
assert(r >= 0);
- vhost_client_sync_dirty_bitmap(&dev->client, 0,
- (target_phys_addr_t)~0x0ull);
+ vhost_sync_dirty_bitmap(dev, 0, (target_phys_addr_t)~0x0ull);
if (dev->log) {
g_free(dev->log);
}
@@ -335,31 +345,37 @@ static bool vhost_dev_cmp_memory(struct vhost_dev *dev,
return uaddr != reg->userspace_addr + start_addr - reg->guest_phys_addr;
}
-static void vhost_client_set_memory(CPUPhysMemoryClient *client,
- target_phys_addr_t start_addr,
- ram_addr_t size,
- ram_addr_t phys_offset,
- bool log_dirty)
+static void vhost_set_memory(MemoryListener *listener,
+ MemoryRegionSection *section,
+ bool add)
{
- struct vhost_dev *dev = container_of(client, struct vhost_dev, client);
- ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK;
+ struct vhost_dev *dev = container_of(listener, struct vhost_dev,
+ memory_listener);
+ target_phys_addr_t start_addr = section->offset_within_address_space;
+ ram_addr_t size = section->size;
+ bool log_dirty = memory_region_is_logging(section->mr);
int s = offsetof(struct vhost_memory, regions) +
(dev->mem->nregions + 1) * sizeof dev->mem->regions[0];
uint64_t log_size;
int r;
+ void *ram;
+
+ if (!memory_region_is_ram(section->mr)) {
+ return;
+ }
dev->mem = g_realloc(dev->mem, s);
if (log_dirty) {
- flags = IO_MEM_UNASSIGNED;
+ add = false;
}
assert(size);
/* Optimize no-change case. At least cirrus_vga does this a lot at this
time. */
- if (flags == IO_MEM_RAM) {
- if (!vhost_dev_cmp_memory(dev, start_addr, size,
- (uintptr_t)qemu_get_ram_ptr(phys_offset))) {
+ ram = memory_region_get_ram_ptr(section->mr);
+ if (add) {
+ if (!vhost_dev_cmp_memory(dev, start_addr, size, (uintptr_t)ram)) {
/* Region exists with same address. Nothing to do. */
return;
}
@@ -371,10 +387,9 @@ static void vhost_client_set_memory(CPUPhysMemoryClient
*client,
}
vhost_dev_unassign_memory(dev, start_addr, size);
- if (flags == IO_MEM_RAM) {
+ if (add) {
/* Add given mapping, merging adjacent regions if any */
- vhost_dev_assign_memory(dev, start_addr, size,
- (uintptr_t)qemu_get_ram_ptr(phys_offset));
+ vhost_dev_assign_memory(dev, start_addr, size, (uintptr_t)ram);
} else {
/* Remove old mapping for this memory, if any. */
vhost_dev_unassign_memory(dev, start_addr, size);
@@ -410,6 +425,18 @@ static void vhost_client_set_memory(CPUPhysMemoryClient
*client,
}
}
+static void vhost_region_add(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ vhost_set_memory(listener, section, true);
+}
+
+static void vhost_region_del(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ vhost_set_memory(listener, section, false);
+}
+
static int vhost_virtqueue_set_addr(struct vhost_dev *dev,
struct vhost_virtqueue *vq,
unsigned idx, bool enable_log)
@@ -467,10 +494,10 @@ static int vhost_dev_set_log(struct vhost_dev *dev, bool
enable_log)
return r;
}
-static int vhost_client_migration_log(CPUPhysMemoryClient *client,
- int enable)
+static int vhost_migration_log(MemoryListener *listener, int enable)
{
- struct vhost_dev *dev = container_of(client, struct vhost_dev, client);
+ struct vhost_dev *dev = container_of(listener, struct vhost_dev,
+ memory_listener);
int r;
if (!!enable == dev->log_enabled) {
return 0;
@@ -500,6 +527,38 @@ static int vhost_client_migration_log(CPUPhysMemoryClient
*client,
return 0;
}
+static void vhost_log_global_start(MemoryListener *listener)
+{
+ int r;
+
+ r = vhost_migration_log(listener, true);
+ if (r < 0) {
+ abort();
+ }
+}
+
+static void vhost_log_global_stop(MemoryListener *listener)
+{
+ int r;
+
+ r = vhost_migration_log(listener, false);
+ if (r < 0) {
+ abort();
+ }
+}
+
+static void vhost_log_start(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ /* FIXME: implement */
+}
+
+static void vhost_log_stop(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ /* FIXME: implement */
+}
+
static int vhost_virtqueue_init(struct vhost_dev *dev,
struct VirtIODevice *vdev,
struct vhost_virtqueue *vq,
@@ -645,17 +704,21 @@ int vhost_dev_init(struct vhost_dev *hdev, int devfd,
bool force)
}
hdev->features = features;
- hdev->client.set_memory = vhost_client_set_memory;
- hdev->client.sync_dirty_bitmap = vhost_client_sync_dirty_bitmap;
- hdev->client.migration_log = vhost_client_migration_log;
- hdev->client.log_start = NULL;
- hdev->client.log_stop = NULL;
+ hdev->memory_listener = (MemoryListener) {
+ .region_add = vhost_region_add,
+ .region_del = vhost_region_del,
+ .log_start = vhost_log_start,
+ .log_stop = vhost_log_stop,
+ .log_sync = vhost_log_sync,
+ .log_global_start = vhost_log_global_start,
+ .log_global_stop = vhost_log_global_stop,
+ };
hdev->mem = g_malloc0(offsetof(struct vhost_memory, regions));
hdev->log = NULL;
hdev->log_size = 0;
hdev->log_enabled = false;
hdev->started = false;
- cpu_register_phys_memory_client(&hdev->client);
+ memory_listener_register(&hdev->memory_listener);
hdev->force = force;
return 0;
fail:
@@ -666,7 +729,7 @@ int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool
force)
void vhost_dev_cleanup(struct vhost_dev *hdev)
{
- cpu_unregister_phys_memory_client(&hdev->client);
+ memory_listener_unregister(&hdev->memory_listener);
g_free(hdev->mem);
close(hdev->control);
}
@@ -808,8 +871,7 @@ void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice
*vdev)
hdev->vqs + i,
i);
}
- vhost_client_sync_dirty_bitmap(&hdev->client, 0,
- (target_phys_addr_t)~0x0ull);
+ vhost_sync_dirty_bitmap(hdev, 0, (target_phys_addr_t)~0x0ull);
r = vdev->binding->set_guest_notifiers(vdev->binding_opaque, false);
if (r < 0) {
fprintf(stderr, "vhost guest notifier cleanup failed: %d\n", r);
diff --git a/hw/vhost.h b/hw/vhost.h
index c9452f0..d1824ec 100644
--- a/hw/vhost.h
+++ b/hw/vhost.h
@@ -3,6 +3,7 @@
#include "hw/hw.h"
#include "hw/virtio.h"
+#include "memory.h"
/* Generic structures common for any vhost based device. */
struct vhost_virtqueue {
@@ -26,7 +27,7 @@ typedef unsigned long vhost_log_chunk_t;
struct vhost_memory;
struct vhost_dev {
- CPUPhysMemoryClient client;
+ MemoryListener memory_listener;
int control;
struct vhost_memory *mem;
struct vhost_virtqueue *vqs;
--
1.7.7.1
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