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| author |   Pankaj Gupta <pagupta@redhat.com> | 2019-07-05 19:33:23 +0530 |
|---|---|---|
| committer |   Dan Williams <dan.j.williams@intel.com> | 2019-07-05 15:19:10 -0700 |
| commit | 6e84200c0a2994b991259d19450eee561029bf70 (patch) | |
| tree | 66e3cd2cb9bf896803e6012148731cb4ddeaf36f /include/uapi/linux/virtio_ids.h | |
| parent | libnvdimm: nd_region flush callback support (diff) | |
| download | linux-dev-6e84200c0a2994b991259d19450eee561029bf70.tar.xz linux-dev-6e84200c0a2994b991259d19450eee561029bf70.zip | |
virtio-pmem: Add virtio pmem driver
This patch adds virtio-pmem driver for KVM guest.
Guest reads the persistent memory range information from
Qemu over VIRTIO and registers it on nvdimm_bus. It also
creates a nd_region object with the persistent memory
range information so that existing 'nvdimm/pmem' driver
can reserve this into system memory map. This way
'virtio-pmem' driver uses existing functionality of pmem
driver to register persistent memory compatible for DAX
capable filesystems.
This also provides function to perform guest flush over
VIRTIO from 'pmem' driver when userspace performs flush
on DAX memory range.
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jakub Staron <jstaron@google.com>
Tested-by: Jakub Staron <jstaron@google.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/uapi/linux/virtio_ids.h')
| -rw-r--r-- | include/uapi/linux/virtio_ids.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h index 6d5c3b2d4f4d..32b2f94d1f58 100644 --- a/include/uapi/linux/virtio_ids.h +++ b/include/uapi/linux/virtio_ids.h @@ -43,5 +43,6 @@ #define VIRTIO_ID_INPUT 18 /* virtio input */ #define VIRTIO_ID_VSOCK 19 /* virtio vsock transport */ #define VIRTIO_ID_CRYPTO 20 /* virtio crypto */ +#define VIRTIO_ID_PMEM 27 /* virtio pmem */ #endif /* _LINUX_VIRTIO_IDS_H */ |