diff options
| author | Christoph Hellwig <hch@lst.de> | 2015-04-30 11:44:17 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2015-05-22 17:08:00 +0200 |
| commit | aacd5650c68ef2e9e19079ba60cb0df51e15880c (patch) | |
| tree | b67b475e17bcda3701145c78a0fdd6b79bda44e4 | |
| parent | ecbda7a22576591a84f44de1be0150faf6001f1c (diff) | |
nvme: support NVME_VOLATILE_WRITE_CACHE feature
The SCSI emulation in the Linux NVMe driver really wants to know
if a device has a volatile write cache. Given that qemu has moved
away from a model where we report the backing store WCE bit to
one where the WCE bit is supposed to be part of the migratable
guest-visible state we always return 1 here.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | hw/block/nvme.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/hw/block/nvme.c b/hw/block/nvme.c index ad988d7c24..4b6d5e6078 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -479,6 +479,9 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req) req->cqe.result = cpu_to_le32((n->num_queues - 1) | ((n->num_queues - 1) << 16)); break; + case NVME_VOLATILE_WRITE_CACHE: + req->cqe.result = cpu_to_le32(1); + break; default: return NVME_INVALID_FIELD | NVME_DNR; } |