[libvirt] add ivshmem property master

[吴 雨霖]

[Problem Description]

  I read qemu-doc.texi in qemu-mster source code, which have a explain of migrating ivshmem below

“With device property @option{master=on}, the guest will copy the shared.memory on migration to the destination host.  With @option{master=off}, the guest will not be able to migrate with the device attached.”

  However, libvirt library can not recognize the property “master=on”. When I directly used command "qemu-kvm -device ivshmem-plain,id=shmem0,memdev=shmmem-shmem0,master=on,bus=pci.0,addr=0xa” to launch a guest, qemu support ivshmem property master=on.

  So, I suggest adding code to support property master=on in libvirt.



[Code Review]



    The below is the part of source code in qemu-master. There's no definition here  about ivshmem master.

domain_conf.h

struct _virDomainShmemDef {

    char *name;

    unsigned long long size;

    int model; /* enum virDomainShmemModel */

    struct {

        bool enabled;

        virDomainChrSourceDef chr;

    } server;

    struct {

        bool enabled;

        unsigned vectors;

        virTristateSwitch ioeventfd;

    } msi;

    virDomainDeviceInfo info;

};

[changed code]

src/conf/domain_conf.c

src/conf/domain_conf.h



[Detail of Source Code Modification]

src/conf/domain_conf.h

[cid:image001.png at 01D4BA48.57FBFA10]



src/conf/domain_conf.c

[cid:image002.png at 01D4BA48.5B8017C0]














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