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SubjectRe: [PATCH v13 2/7] virtio-pmem: Add virtio pmem driver
On Wed, 12 Jun 2019 18:15:22 +0530
Pankaj Gupta <pagupta@redhat.com> wrote:

> 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>
> ---
> drivers/nvdimm/Makefile | 1 +
> drivers/nvdimm/nd_virtio.c | 125 +++++++++++++++++++++++++++++++
> drivers/nvdimm/virtio_pmem.c | 122 ++++++++++++++++++++++++++++++
> drivers/nvdimm/virtio_pmem.h | 55 ++++++++++++++
> drivers/virtio/Kconfig | 11 +++
> include/uapi/linux/virtio_ids.h | 1 +
> include/uapi/linux/virtio_pmem.h | 35 +++++++++
> 7 files changed, 350 insertions(+)
> create mode 100644 drivers/nvdimm/nd_virtio.c
> create mode 100644 drivers/nvdimm/virtio_pmem.c
> create mode 100644 drivers/nvdimm/virtio_pmem.h
> create mode 100644 include/uapi/linux/virtio_pmem.h

Reviewed-by: Cornelia Huck <cohuck@redhat.com>

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