On Feb  2 08:00, Chaitanya Kulkarni wrote:

Mikulas,

On 2/1/22 10:33 AM, Mikulas Patocka wrote:

quoted

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This patch adds a new driver "nvme-debug". It uses memory as a backing
store and it is used to test the copy offload functionality.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

NVMe Controller specific memory backed features needs to go into
QEMU which are targeted for testing and debugging, just like what
we have done for NVMe ZNS QEMU support and not in kernel.

I don't see any special reason to make copy offload an exception.

FWIW the emulated nvme device in QEMU already supports the Copy command.