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[PATCH v2 0/2] Enable virtio-fs on s390x
From: |
Marc Hartmayer |
Subject: |
[PATCH v2 0/2] Enable virtio-fs on s390x |
Date: |
Tue, 1 Sep 2020 17:00:17 +0200 |
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:
v1 -> v2:
- rebased
- patch 1:
+ changed to Meson build. I kept the r-b from Conny since this
change seems to be straightforward to me.
- patch 2:
+ added r-b from Michael
+ added comment from Conny
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
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/meson.build | 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
- [PATCH v2 0/2] Enable virtio-fs on s390x,
Marc Hartmayer <=