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[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
src/conf/domain_conf.c
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