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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2022-10-13 14:59:08 -0400 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2022-10-26 14:56:42 -0400 |
| commit | baf422684d73c7bf38e2c18815e18d44fcf395b6 (patch) | |
| tree | 3ed8a3693f381a50de97abceea510e30f6260294 /include/hw | |
| parent | c5640b3e2f1146e8eea9f9f62db87713388d8bc8 (diff) | |
| download | qemu-baf422684d73c7bf38e2c18815e18d44fcf395b6.zip qemu-baf422684d73c7bf38e2c18815e18d44fcf395b6.tar.gz qemu-baf422684d73c7bf38e2c18815e18d44fcf395b6.tar.bz2 | |
virtio-blk: use BDRV_REQ_REGISTERED_BUF optimization hint
Register guest RAM using BlockRAMRegistrar and set the
BDRV_REQ_REGISTERED_BUF flag so block drivers can optimize memory
accesses in I/O requests.
This is for vdpa-blk, vhost-user-blk, and other I/O interfaces that rely
on DMA mapping/unmapping.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20221013185908.1297568-14-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/virtio/virtio-blk.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h index d311c57..7f589b4 100644 --- a/include/hw/virtio/virtio-blk.h +++ b/include/hw/virtio/virtio-blk.h @@ -19,6 +19,7 @@ #include "hw/block/block.h" #include "sysemu/iothread.h" #include "sysemu/block-backend.h" +#include "sysemu/block-ram-registrar.h" #include "qom/object.h" #define TYPE_VIRTIO_BLK "virtio-blk-device" @@ -64,6 +65,7 @@ struct VirtIOBlock { struct VirtIOBlockDataPlane *dataplane; uint64_t host_features; size_t config_size; + BlockRAMRegistrar blk_ram_registrar; }; typedef struct VirtIOBlockReq { |