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vdpa_sim_blk: add support for discard and write-zeroes
Expose VIRTIO_BLK_F_DISCARD and VIRTIO_BLK_F_WRITE_ZEROES features to the drivers and handle VIRTIO_BLK_T_DISCARD and VIRTIO_BLK_T_WRITE_ZEROES requests checking ranges and flags. The simulator behaves like a ramdisk, so for VIRTIO_BLK_F_DISCARD does nothing, while for VIRTIO_BLK_T_WRITE_ZEROES sets to 0 the specified region. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20220811083632.77525-5-sgarzare@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Stefano Garzarella
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Michael S. Tsirkin
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Aug 11, 2022
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