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* [PATCH 0/2] Enable virtio-fs on s390x
@ 2020-07-30 14:07 Marc Hartmayer
  2020-07-30 14:07 ` [PATCH 1/2] virtio: add vhost-user-fs-ccw device Marc Hartmayer
                   ` (3 more replies)
  0 siblings, 4 replies; 12+ messages in thread
From: Marc Hartmayer @ 2020-07-30 14:07 UTC (permalink / raw)
  To: qemu-devel
  Cc: Daniel P. Berrangé,
	Michael S. Tsirkin, Cornelia Huck, Dr. David Alan Gilbert,
	Halil Pasic, Stefan Hajnoczi, Marc-André Lureau

This patch series is about enabling virtio-fs on s390x. For that we need
 + some shim code (first patch), and we need
 + libvhost-user to deal with virtio endiannes for non-legacy virtio
   devices as mandated by the spec.

How to use?

For general instructions how to use virtio-fs (on x86) please have a
look at https://virtio-fs.gitlab.io/howto-qemu.html. Most of the
instructions can also be applied on s390x.

In short:

1. Install self-compiled QEMU with this patch series applied
2. Prepare host and guest kernel so they support virtio-fs

Start virtiofsd on the host

 $ virtiofsd -f --socket-path=/tmp/vhostqemu -o source=/tmp/shared

Now you can start QEMU in a separate shell on the host:

 $ qemu-system-s390x -machine type=s390-ccw-virtio,accel=kvm,memory-backend=mem \
   -object memory-backend-file,id=mem,size=2G,mem-path=/dev/shm/virtiofs,share=on,prealloc=on,prealloc-threads=1 \
   -chardev socket,id=char0,path=/tmp/vhostqemu -device vhost-user-fs-ccw,queue-size=1024,chardev=char0,tag=myfs \
   -drive if=virtio,file=disk.qcow2 \
   -m 2G -smp 2 -nographic

Log into the guest and mount it

 $ mount -t virtiofs myfs /mnt

Changelog:
 RFC v2 -> v1:
 - patch 1:
  + Added `force_revision_1 = true` (Conny)
  + I didn't add the r-b from Stefan Hajnoczi as I've added the
    changes suggested by Conny
 - squashed patches 2 and 3:
  + removed assertion in performance critical code path (Stefan)
  + dropped all dead code (Stefan)
  + removed libvhost-access.h
  
 RFC v1 -> RFC v2:
  + rebased
  + drop patch "libvhost-user: print invalid address on vu_panic" as it's not related to this series
  + drop patch "[RFC 4/4] HACK: Hard-code the libvhost-user.o-cflags for s390x"
  + patch "virtio: add vhost-user-fs-ccw device": replace qdev_set_parent_bus and object_property_set_bool by qdev_realize
  + patch "libvhost-user: handle endianness as mandated by the spec":
    Drop support for legacy virtio devices
  + add patch to fence legacy virtio devices
*** BLURB HERE ***

Halil Pasic (1):
  virtio: add vhost-user-fs-ccw device

Marc Hartmayer (1):
  libvhost-user: handle endianness as mandated by the spec

 contrib/libvhost-user/libvhost-user.c | 77 +++++++++++++++------------
 hw/s390x/Makefile.objs                |  1 +
 hw/s390x/vhost-user-fs-ccw.c          | 75 ++++++++++++++++++++++++++
 3 files changed, 119 insertions(+), 34 deletions(-)
 create mode 100644 hw/s390x/vhost-user-fs-ccw.c

-- 
2.25.4



^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2020-08-27 12:28 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-30 14:07 [PATCH 0/2] Enable virtio-fs on s390x Marc Hartmayer
2020-07-30 14:07 ` [PATCH 1/2] virtio: add vhost-user-fs-ccw device Marc Hartmayer
2020-07-30 15:19   ` Cornelia Huck
2020-07-30 14:07 ` [PATCH 2/2] libvhost-user: handle endianness as mandated by the spec Marc Hartmayer
2020-08-02  5:13   ` Michael S. Tsirkin
2020-08-03 14:17     ` Marc Hartmayer
2020-08-03  9:26   ` Cornelia Huck
2020-08-21  8:50     ` Marc Hartmayer
2020-08-02  5:13 ` [PATCH 0/2] Enable virtio-fs on s390x Michael S. Tsirkin
2020-08-04 11:29   ` Dr. David Alan Gilbert
2020-08-27 12:19 ` Michael S. Tsirkin
2020-08-27 12:26   ` Cornelia Huck

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