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Role(master or peer) controls how the domain behaves on migration. For more details about migration with ivshmem, see https://git.qemu.org/?p=qemu.git;a=blob_plain;f=docs/system/ivshmem.rst;hb=HEAD It's a optional attribute in libvirt, and qemu will choose default role for ivshmem device if the user is not specified. With device property 'role', the value can be 'master' or 'peer'. - 'master' (means 'master=on' in qemu), the guest will copy the shared memory on migration to the destination host. - 'peer' (means 'master=off' in qemu), the migration is disabled. Signed-off-by: Martin Kletzander <mkletzan@redhat.com> Signed-off-by: Yang Hang <yanghang44@huawei.com> Signed-off-by: Wang Xin <wangxinxin.wang@huawei.com> Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
54 lines
2.0 KiB
Plaintext
54 lines
2.0 KiB
Plaintext
LC_ALL=C \
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PATH=/bin \
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HOME=/tmp/lib/domain--1-QEMUGuest1 \
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USER=test \
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LOGNAME=test \
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XDG_DATA_HOME=/tmp/lib/domain--1-QEMUGuest1/.local/share \
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XDG_CACHE_HOME=/tmp/lib/domain--1-QEMUGuest1/.cache \
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XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
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QEMU_AUDIO_DRV=none \
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/usr/bin/qemu-system-i386 \
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-name QEMUGuest1 \
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-S \
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-machine pc,accel=tcg,usb=off,dump-guest-core=off \
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-m 214 \
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-realtime mlock=off \
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-smp 1,sockets=1,cores=1,threads=1 \
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-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
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-display none \
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-no-user-config \
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-nodefaults \
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-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\
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server,nowait \
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-mon chardev=charmonitor,id=monitor,mode=control \
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-rtc base=utc \
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-no-shutdown \
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-no-acpi \
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-usb \
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-object memory-backend-file,id=shmmem-shmem0,mem-path=/dev/shm/shmem0,\
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size=4194304,share=yes \
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-device ivshmem-plain,id=shmem0,memdev=shmmem-shmem0,bus=pci.0,addr=0x3 \
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-object memory-backend-file,id=shmmem-shmem1,mem-path=/dev/shm/shmem1,\
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size=134217728,share=yes \
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-device ivshmem-plain,id=shmem1,memdev=shmmem-shmem1,master=off,bus=pci.0,\
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addr=0x5 \
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-object memory-backend-file,id=shmmem-shmem2,mem-path=/dev/shm/shmem2,\
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size=268435456,share=yes \
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-device ivshmem-plain,id=shmem2,memdev=shmmem-shmem2,master=on,bus=pci.0,\
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addr=0x4 \
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-device ivshmem-doorbell,id=shmem3,chardev=charshmem3,ioeventfd=on,bus=pci.0,\
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addr=0x6 \
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-chardev socket,id=charshmem3,path=/var/lib/libvirt/shmem-shmem3-sock \
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-device ivshmem-doorbell,id=shmem4,chardev=charshmem4,ioeventfd=on,bus=pci.0,\
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addr=0x7 \
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-chardev socket,id=charshmem4,path=/tmp/shmem4-sock \
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-device ivshmem-doorbell,id=shmem5,chardev=charshmem5,ioeventfd=off,bus=pci.0,\
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addr=0x8 \
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-chardev socket,id=charshmem5,path=/tmp/shmem5-sock \
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-device ivshmem-doorbell,id=shmem6,chardev=charshmem6,vectors=16,ioeventfd=on,\
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bus=pci.0,addr=0x9 \
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-chardev socket,id=charshmem6,path=/tmp/shmem6-sock \
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-device ivshmem-doorbell,id=shmem7,chardev=charshmem7,vectors=32,ioeventfd=on,\
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bus=pci.0,addr=0xa \
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-chardev socket,id=charshmem7,path=/tmp/shmem7-sock
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