search for: 346389565ac1

...when userspace performs flush > > > on DAX memory range. > > > > > > Signed-off-by: Pankaj Gupta <pagupta at redhat.com> > > > diff --git a/include/uapi/linux/virtio_ids.h > > > b/include/uapi/linux/virtio_ids.h > > > index 6d5c3b2d4f4d..346389565ac1 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 */ >...

...when userspace performs flush > > > on DAX memory range. > > > > > > Signed-off-by: Pankaj Gupta <pagupta at redhat.com> > > > diff --git a/include/uapi/linux/virtio_ids.h > > > b/include/uapi/linux/virtio_ids.h > > > index 6d5c3b2d4f4d..346389565ac1 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 */ >...

...> > > on DAX memory range. > > > > > > > > Signed-off-by: Pankaj Gupta <pagupta at redhat.com> > > > > > diff --git a/include/uapi/linux/virtio_ids.h > > > > b/include/uapi/linux/virtio_ids.h > > > > index 6d5c3b2d4f4d..346389565ac1 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...

...information */ > + uint64_t start; > + uint64_t size; > +}; > + > +void host_ack(struct virtqueue *vq); > +int virtio_pmem_flush(struct nd_region *nd_region); > +#endif > diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h > index 6d5c3b2d4f4d..346389565ac1 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 crypt...

...information */ > + uint64_t start; > + uint64_t size; > +}; > + > +void host_ack(struct virtqueue *vq); > +int virtio_pmem_flush(struct nd_region *nd_region); > +#endif > diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h > index 6d5c3b2d4f4d..346389565ac1 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 crypt...

...information */ > + uint64_t start; > + uint64_t size; > +}; > + > +void host_ack(struct virtqueue *vq); > +int virtio_pmem_flush(struct nd_region *nd_region); > +#endif > diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h > index 6d5c3b2d4f4d..346389565ac1 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 crypt...

...> > + > > > +void host_ack(struct virtqueue *vq); > > > +int virtio_pmem_flush(struct nd_region *nd_region); > > > +#endif > > > diff --git a/include/uapi/linux/virtio_ids.h > > > b/include/uapi/linux/virtio_ids.h > > > index 6d5c3b2d4f4d..346389565ac1 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 */ >...

...> > + > > > +void host_ack(struct virtqueue *vq); > > > +int virtio_pmem_flush(struct nd_region *nd_region); > > > +#endif > > > diff --git a/include/uapi/linux/virtio_ids.h > > > b/include/uapi/linux/virtio_ids.h > > > index 6d5c3b2d4f4d..346389565ac1 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 */ >...

...+ spinlock_t pmem_lock; + + /* Memory region information */ + uint64_t start; + uint64_t size; +}; + +void host_ack(struct virtqueue *vq); +int virtio_pmem_flush(struct nd_region *nd_region); +#endif diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h index 6d5c3b2d4f4d..346389565ac1 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...

...+ spinlock_t pmem_lock; + + /* Memory region information */ + uint64_t start; + uint64_t size; +}; + +void host_ack(struct virtqueue *vq); +int virtio_pmem_flush(struct nd_region *nd_region); +#endif diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h index 6d5c3b2d4f4d..346389565ac1 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...

...uint64_t size; > > +}; > > + > > +void host_ack(struct virtqueue *vq); > > +int virtio_pmem_flush(struct nd_region *nd_region); > > +#endif > > diff --git a/include/uapi/linux/virtio_ids.h > > b/include/uapi/linux/virtio_ids.h > > index 6d5c3b2d4f4d..346389565ac1 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_C...

...uint64_t size; > > +}; > > + > > +void host_ack(struct virtqueue *vq); > > +int virtio_pmem_flush(struct nd_region *nd_region); > > +#endif > > diff --git a/include/uapi/linux/virtio_ids.h > > b/include/uapi/linux/virtio_ids.h > > index 6d5c3b2d4f4d..346389565ac1 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_C...

...; +void host_ack(struct virtqueue *vq); > > > > +int virtio_pmem_flush(struct nd_region *nd_region); > > > > +#endif > > > > diff --git a/include/uapi/linux/virtio_ids.h > > > > b/include/uapi/linux/virtio_ids.h > > > > index 6d5c3b2d4f4d..346389565ac1 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...

This patch series has implementation for "virtio pmem". "virtio pmem" is fake persistent memory(nvdimm) in guest which allows to bypass the guest page cache. This also implements a VIRTIO based asynchronous flush mechanism. Sharing guest kernel driver in this patchset with the changes suggested in v3. Tested with Qemu side device emulation [6] for virtio-pmem.

This patch series has implementation for "virtio pmem". "virtio pmem" is fake persistent memory(nvdimm) in guest which allows to bypass the guest page cache. This also implements a VIRTIO based asynchronous flush mechanism. Sharing guest kernel driver in this patchset with the changes suggested in v4. Tested with Qemu side device emulation [6] for virtio-pmem.