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hw/virtio: add vhost_user_[read|write] trace points 

These are useful when trying to debug the initial vhost-user
negotiation, especially when it hard to get logging from the low level
library on the other side.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

Message-Id: <20220321153037.3622127-4-alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
This commit is contained in:
Alex Bennée 2022-03-21 15:30:27 +00:00 committed by Michael S. Tsirkin
parent 31cc62bb5b
commit 6ca6d8ee9d
2 changed files with 6 additions and 0 deletions
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2
hw/virtio/trace-events
View File

@ -21,6 +21,8 @@ vhost_user_set_mem_table_withfd(int index, const char *name, uint64_t memory_siz
vhost_user_postcopy_waker(const char *rb, uint64_t rb_offset) "%s + 0x%"PRIx64
vhost_user_postcopy_waker_found(uint64_t client_addr) "0x%"PRIx64
vhost_user_postcopy_waker_nomatch(const char *rb, uint64_t rb_offset) "%s + 0x%"PRIx64
vhost_user_read(uint32_t req, uint32_t flags) "req:%d flags:0x%"PRIx32""
vhost_user_write(uint32_t req, uint32_t flags) "req:%d flags:0x%"PRIx32""
# vhost-vdpa.c
vhost_vdpa_dma_map(void *vdpa, int fd, uint32_t msg_type, uint64_t iova, uint64_t size, uint64_t uaddr, uint8_t perm, uint8_t type) "vdpa:%p fd: %d msg_type: %"PRIu32" iova: 0x%"PRIx64" size: 0x%"PRIx64" uaddr: 0x%"PRIx64" perm: 0x%"PRIx8" type: %"PRIu8

4
hw/virtio/vhost-user.c
View File

@ -489,6 +489,8 @@ static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg,
return ret < 0 ? -saved_errno : -EIO;
}
trace_vhost_user_write(msg->hdr.request, msg->hdr.flags);
return 0;
}
@ -542,6 +544,8 @@ static int vhost_user_set_log_base(struct vhost_dev *dev, uint64_t base,
}
}
trace_vhost_user_read(msg.hdr.request, msg.hdr.flags);
return 0;
}