[pve-devel] [PATCH guest-common/qemu-server/manager/docs] enable experimental support for pci live migration

[Dominik Csapak <d.csapak@proxmox.com>]

for mapped resources. This requires driver and hardware support,
but aside from nvidia vgpus there don't seem to be many drivers
(if any) that do support that.

qemu already supports that for vfio-pci devices, so nothing to be
done there besides actively enabling it.

Since we currently can't properly test it here and very much depends on
hardware/driver support, mark it as experimental everywhere (docs/api/gui).
(though i tested the live-migration part manually here by using
"exec:cat > /tmp/test" for the migration target, and "exec: cat
/tmp/test" as the 'incoming' parameter for a new vm start, which worked ;) )

i opted for marking them migratable at the mapping level, but we could
theoretically also put it in the hostpciX config instead.
(though imho it fits better in the cluster-wide resource mapping config)

also the naming/texts could probably be improved, but i think
'live-migration-capable' is very descriptive and i didn't want to
use an overly short name for it (which can be confusing, see the
'shared' flag for storages)

note that patch 1 of qemu-server is only a cosmetic fix that i
encountered while testing and can be applied independently

pve-guest-common:

Dominik Csapak (2):
  mapping: pci: add 'live-migration-capable' flag to mappings
  mapping: pci: optionally return the config in 'find_on_current_node'

 src/PVE/Mapping/PCI.pm | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

qemu-server:

Dominik Csapak (4):
  usb: fix undef error on string match
  pci: set 'enable-migration' to on for live-migration marked mapped
    devices
  check_local_resources: add more info per mapped device
  api: enable live migration for marked mapped pci devices

 PVE/API2/Qemu.pm      |  7 ++++++-
 PVE/QemuMigrate.pm    | 13 +++++++++----
 PVE/QemuServer.pm     | 12 +++++++-----
 PVE/QemuServer/PCI.pm |  8 +++++++-
 4 files changed, 29 insertions(+), 11 deletions(-)

pve-docs:

Dominik Csapak (2):
  qm: resource mapping: add description for `mdev` option
  qm: resource mapping: document `live-migration-capable` setting

 qm.adoc | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

pve-manager:

Dominik Csapak (1):
  ui: allow configuring and live migration of mapped pci resources

 www/manager6/window/Migrate.js    | 22 +++++++++++++++++++---
 www/manager6/window/PCIMapEdit.js | 12 ++++++++++++
 2 files changed, 31 insertions(+), 3 deletions(-)

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2.39.2