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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2012-11-14 15:15:50 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2013-01-02 15:55:47 +0100 |
| commit | 88807f89d945acad54c8365ff7b6ef0f0d0ddd56 (patch) | |
| tree | 2881d517920dc5c1737d9a1d422b4ff098525854 /trace-events | |
| parent | 185ecf40e3589fc2717b0856ee1df05dd63a46dd (diff) | |
| download | qemu-88807f89d945acad54c8365ff7b6ef0f0d0ddd56.zip qemu-88807f89d945acad54c8365ff7b6ef0f0d0ddd56.tar.gz qemu-88807f89d945acad54c8365ff7b6ef0f0d0ddd56.tar.bz2 | |
dataplane: add virtqueue vring code
The virtio-blk-data-plane cannot access memory using the usual QEMU
functions since it executes outside the global mutex and the memory APIs
are this time are not thread-safe.
This patch introduces a virtqueue module based on the kernel's vhost
vring code. The trick is that we map guest memory ahead of time and
access it cheaply outside the global mutex.
Once the hardware emulation code can execute outside the global mutex it
will be possible to drop this code.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'trace-events')
| -rw-r--r-- | trace-events | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/trace-events b/trace-events index bb7621e..167d776 100644 --- a/trace-events +++ b/trace-events @@ -98,6 +98,9 @@ virtio_blk_rw_complete(void *req, int ret) "req %p ret %d" virtio_blk_handle_write(void *req, uint64_t sector, size_t nsectors) "req %p sector %"PRIu64" nsectors %zu" virtio_blk_handle_read(void *req, uint64_t sector, size_t nsectors) "req %p sector %"PRIu64" nsectors %zu" +# hw/dataplane/vring.c +vring_setup(uint64_t physical, void *desc, void *avail, void *used) "vring physical %#"PRIx64" desc %p avail %p used %p" + # thread-pool.c thread_pool_submit(void *req, void *opaque) "req %p opaque %p" thread_pool_complete(void *req, void *opaque, int ret) "req %p opaque %p ret %d" |