v2 of:

https://www.redhat.com/archives/libvir-list/2017-February/msg01229.html


How to test this feature?

$ > /tmp/nvdimm
$ truncate --size 512M /tmp/nvdimm
$ virsh edit $mydom

    <memory model='nvdimm' access='shared'>
      <source>
        <path>/tmp/nvdimm</path>
      </source>
      <target>
        <size unit='MiB'>512</size>
        <node>0</node>
        <label>
          <size unit='KiB'>128</size>
        </label>
      </target>
      <address type='dimm' slot='0'/>
    </memory>

$ virsh start $mydom
$ ssh $mydom "echo \"Hello world\" > /dev/pmem0"
$ hexdump -C /tmp/nvdimm

    00000000  48 65 6c 6c 6f 20 77 6f  72 6c 64 0a 00 00 00 00  |Hello world.....|
    00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
    *
    20000000


Michal Privoznik (14):
  qemuBuildMemoryBackendStr: Reorder args and update comment
  Introduce NVDIMM memory model
  qemu: Introduce QEMU_CAPS_DEVICE_NVDIMM
  qemu: Implement NVDIMM
  conf: Introduce @access to <memory/>
  qemu: Implement @access for <memory/> banks
  qemu: Introduce label-size for NVDIMMs
  security_dac: Label host side of NVDIMM
  security_selinux: Label host side of NVDIMM
  security: Introduce internal APIs for memdev labelling
  secdrivers: Implement memdev relabel APIs
  qemu_hotplug: Relabel memdev
  qemu: Allow nvdimm in devices CGroups
  qemu: Namespaces for NVDIMM

 docs/formatdomain.html.in                          |  79 ++++++++---
 docs/schemas/domaincommon.rng                      |  47 +++++--
 src/conf/domain_conf.c                             | 131 +++++++++++++----
 src/conf/domain_conf.h                             |   5 +
 src/libvirt_private.syms                           |   2 +
 src/qemu/qemu_alias.c                              |  10 +-
 src/qemu/qemu_capabilities.c                       |   9 ++
 src/qemu/qemu_capabilities.h                       |   1 +
 src/qemu/qemu_cgroup.c                             |  49 +++++++
 src/qemu/qemu_cgroup.h                             |   4 +
 src/qemu/qemu_command.c                            | 155 +++++++++++++++------
 src/qemu/qemu_command.h                            |  16 ++-
 src/qemu/qemu_domain.c                             | 105 +++++++++++++-
 src/qemu/qemu_domain.h                             |   8 ++
 src/qemu/qemu_hotplug.c                            |  42 +++++-
 src/qemu/qemu_security.c                           |  56 ++++++++
 src/qemu/qemu_security.h                           |   8 ++
 src/security/security_dac.c                        |  76 ++++++++++
 src/security/security_driver.h                     |   9 ++
 src/security/security_manager.c                    |  56 ++++++++
 src/security/security_manager.h                    |   7 +
 src/security/security_nop.c                        |  19 +++
 src/security/security_selinux.c                    |  69 +++++++++
 src/security/security_stack.c                      |  38 +++++
 .../qemuxml2argv-memory-hotplug-nvdimm-access.args |  26 ++++
 .../qemuxml2argv-memory-hotplug-nvdimm-access.xml  |  56 ++++++++
 .../qemuxml2argv-memory-hotplug-nvdimm-label.args  |  26 ++++
 .../qemuxml2argv-memory-hotplug-nvdimm-label.xml   |  59 ++++++++
 .../qemuxml2argv-memory-hotplug-nvdimm.args        |  26 ++++
 .../qemuxml2argv-memory-hotplug-nvdimm.xml         |  56 ++++++++
 tests/qemuxml2argvtest.c                           |   8 +-
 ...qemuxml2xmlout-memory-hotplug-nvdimm-access.xml |   1 +
 .../qemuxml2xmlout-memory-hotplug-nvdimm-label.xml |   1 +
 .../qemuxml2xmlout-memory-hotplug-nvdimm.xml       |   1 +
 tests/qemuxml2xmltest.c                            |   3 +
 35 files changed, 1144 insertions(+), 120 deletions(-)
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-access.args
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-access.xml
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-label.args
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-label.xml
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm.args
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm.xml
 create mode 120000 tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm-access.xml
 create mode 120000 tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm-label.xml
 create mode 120000 tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm.xml

-- 
2.11.0

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On 02/27/2017 02:19 PM, Michal Privoznik wrote:
> v2 of:
> 
> https://www.redhat.com/archives/libvir-list/2017-February/msg01229.html
> 

Gentle ping.

Michal

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