[PATCH v2] hw/nvme: Return error for fused operations

[Pankaj Raghav]

Currently, FUSED operations are not supported by QEMU. As per the 1.4 SPEC,
controller should abort the command that requested a fused operation with 
an INVALID FIELD error code if they are not supported.

Changes from v1:
Added FUSE flag check also to the admin cmd processing as the FUSED 
operations are mentioned in the general SQE section in the SPEC. 

Signed-off-by: Pankaj Raghav <p.rag...@samsung.com>
---
 hw/nvme/ctrl.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index dc0e7b0030..2f247a9275 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -3893,6 +3893,10 @@ static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeRequest 
*req)
         return ns->status;
     }
 
+    if (NVME_CMD_FLAGS_FUSE(req->cmd.flags)) {
+        return NVME_INVALID_FIELD;
+    }
+
     req->ns = ns;
 
     switch (req->cmd.opcode) {
@@ -5475,6 +5479,10 @@ static uint16_t nvme_admin_cmd(NvmeCtrl *n, NvmeRequest 
*req)
         return NVME_INVALID_FIELD | NVME_DNR;
     }
 
+    if (NVME_CMD_FLAGS_FUSE(req->cmd.flags)) {
+        return NVME_INVALID_FIELD;
+    }
+
     switch (req->cmd.opcode) {
     case NVME_ADM_CMD_DELETE_SQ:
         return nvme_del_sq(n, req);
-- 
2.25.1