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qemu with hax to log dma reads & writes jcs.org/2018/11/12/vfio
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contrib: add systemd unit files

This lets distros standardize on how QEMU should install systemd
services for qemu-ga and qemu-pr-helper.

The qemu-ga unit file comes from Fedora, but I checked that
Debian is using the same path for the virtio-serisal port.

I would like to include this in 2.11, so that the qemu-pr-helper
socket can be standardized across distros. Note however that
the files are not installed. We can add a configure option
in 2.12 perhaps, but it's too late now; documenting the files
in the release notes should do.

Suggested-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20171124164422.3960-1-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Paolo Bonzini 2ba60ec1 a4a9b6ea

+35
+11
contrib/systemd/qemu-guest-agent.service
··· 1 + [Unit] 2 + Description=QEMU Guest Agent 3 + BindTo=dev-virtio\x2dports-org.qemu.guest_agent.0.device 4 + After=dev-virtio\x2dports-org.qemu.guest_agent.0.device 5 + 6 + [Service] 7 + ExecStart=-/usr/bin/qemu-ga 8 + Restart=always 9 + RestartSec=0 10 + 11 + [Install]
+15
contrib/systemd/qemu-pr-helper.service
··· 1 + [Unit] 2 + Description=Persistent Reservation Daemon for QEMU 3 + 4 + [Service] 5 + WorkingDirectory=/tmp 6 + Type=simple 7 + ExecStart=/usr/bin/qemu-pr-helper 8 + PrivateTmp=yes 9 + ProtectSystem=strict 10 + ReadWritePaths=/var/run 11 + RestrictAddressFamilies=AF_UNIX 12 + Restart=always 13 + RestartSec=0 14 + 15 + [Install]
+9
contrib/systemd/qemu-pr-helper.socket
··· 1 + [Unit] 2 + Description=Persistent Reservation Daemon for QEMU 3 + 4 + [Socket] 5 + ListenStream=/run/qemu-pr-helper.sock 6 + SocketMode=0600 7 + 8 + [Install] 9 + WantedBy=multi-user.target