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[Qemu-devel] [PATCH v4 16/29] vhost+postcopy: Stash RAMBlock and offset
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[Qemu-devel] [PATCH v4 16/29] vhost+postcopy: Stash RAMBlock and offset |
Date: |
Thu, 8 Mar 2018 19:57:58 +0000 |
From: "Dr. David Alan Gilbert" <address@hidden>
Stash the RAMBlock and offset for later use looking up
addresses.
Signed-off-by: Dr. David Alan Gilbert <address@hidden>
---
hw/virtio/trace-events | 1 +
hw/virtio/vhost-user.c | 34 ++++++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+)
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index 05d18ada77..d7e9e1084b 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -9,6 +9,7 @@ vhost_section(const char *name, int r) "%s:%d"
# hw/virtio/vhost-user.c
vhost_user_postcopy_listen(void) ""
vhost_user_set_mem_table_postcopy(uint64_t client_addr, uint64_t qhva, int
reply_i, int region_i) "client:0x%"PRIx64" for hva: 0x%"PRIx64" reply %d region
%d"
+vhost_user_set_mem_table_withfd(int index, const char *name, uint64_t
memory_size, uint64_t guest_phys_addr, uint64_t userspace_addr, uint64_t
offset) "%d:%s: size:0x%"PRIx64" GPA:0x%"PRIx64" QVA/userspace:0x%"PRIx64" RB
offset:0x%"PRIx64
# hw/virtio/virtio.c
virtqueue_alloc_element(void *elem, size_t sz, unsigned in_num, unsigned
out_num) "elem %p size %zd in_num %u out_num %u"
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index 6875f729e8..fd65616961 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -175,6 +175,15 @@ struct vhost_user {
NotifierWithReturn postcopy_notifier;
struct PostCopyFD postcopy_fd;
uint64_t postcopy_client_bases[VHOST_MEMORY_MAX_NREGIONS];
+ /* Length of the region_rb and region_rb_offset arrays */
+ size_t region_rb_len;
+ /* RAMBlock associated with a given region */
+ RAMBlock **region_rb;
+ /* The offset from the start of the RAMBlock to the start of the
+ * vhost region.
+ */
+ ram_addr_t *region_rb_offset;
+
/* True once we've entered postcopy_listen */
bool postcopy_listen;
};
@@ -362,6 +371,17 @@ static int vhost_user_set_mem_table_postcopy(struct
vhost_dev *dev,
msg.hdr.flags |= VHOST_USER_NEED_REPLY_MASK;
}
+ if (u->region_rb_len < dev->mem->nregions) {
+ u->region_rb = g_renew(RAMBlock*, u->region_rb, dev->mem->nregions);
+ u->region_rb_offset = g_renew(ram_addr_t, u->region_rb_offset,
+ dev->mem->nregions);
+ memset(&(u->region_rb[u->region_rb_len]), '\0',
+ sizeof(RAMBlock *) * (dev->mem->nregions - u->region_rb_len));
+ memset(&(u->region_rb_offset[u->region_rb_len]), '\0',
+ sizeof(ram_addr_t) * (dev->mem->nregions - u->region_rb_len));
+ u->region_rb_len = dev->mem->nregions;
+ }
+
for (i = 0; i < dev->mem->nregions; ++i) {
struct vhost_memory_region *reg = dev->mem->regions + i;
ram_addr_t offset;
@@ -372,6 +392,12 @@ static int vhost_user_set_mem_table_postcopy(struct
vhost_dev *dev,
&offset);
fd = memory_region_get_fd(mr);
if (fd > 0) {
+ trace_vhost_user_set_mem_table_withfd(fd_num, mr->name,
+ reg->memory_size,
+ reg->guest_phys_addr,
+ reg->userspace_addr, offset);
+ u->region_rb_offset[i] = offset;
+ u->region_rb[i] = mr->ram_block;
msg.payload.memory.regions[fd_num].userspace_addr =
reg->userspace_addr;
msg.payload.memory.regions[fd_num].memory_size = reg->memory_size;
@@ -380,6 +406,9 @@ static int vhost_user_set_mem_table_postcopy(struct
vhost_dev *dev,
msg.payload.memory.regions[fd_num].mmap_offset = offset;
assert(fd_num < VHOST_MEMORY_MAX_NREGIONS);
fds[fd_num++] = fd;
+ } else {
+ u->region_rb_offset[i] = 0;
+ u->region_rb[i] = NULL;
}
}
@@ -1148,6 +1177,11 @@ static int vhost_user_cleanup(struct vhost_dev *dev)
close(u->slave_fd);
u->slave_fd = -1;
}
+ g_free(u->region_rb);
+ u->region_rb = NULL;
+ g_free(u->region_rb_offset);
+ u->region_rb_offset = NULL;
+ u->region_rb_len = 0;
g_free(u);
dev->opaque = 0;
--
2.14.3
- Re: [Qemu-devel] [PATCH v4 11/29] vhost+postcopy: Transmit 'listen' to client, (continued)
- [Qemu-devel] [PATCH v4 15/29] vhost+postcopy: Send address back to qemu, Dr. David Alan Gilbert (git), 2018/03/08
- [Qemu-devel] [PATCH v4 16/29] vhost+postcopy: Stash RAMBlock and offset,
Dr. David Alan Gilbert (git) <=
- [Qemu-devel] [PATCH v4 17/29] vhost+postcopy: Send requests to source for shared pages, Dr. David Alan Gilbert (git), 2018/03/08
- [Qemu-devel] [PATCH v4 18/29] vhost+postcopy: Resolve client address, Dr. David Alan Gilbert (git), 2018/03/08
- [Qemu-devel] [PATCH v4 20/29] postcopy: postcopy_notify_shared_wake, Dr. David Alan Gilbert (git), 2018/03/08
- [Qemu-devel] [PATCH v4 19/29] postcopy: helper for waking shared, Dr. David Alan Gilbert (git), 2018/03/08