How to use gicv3 ITS for PCI MSI

[叶忠辉 via]

Hi All:
  I want used qemu-system-aarch64 to test PCI msi with gicv3 its, I run command 
as fllower

Sudo ./qemu-system-aarch64 \
        -m 32g \
        -cpu cortex-a53 \
        -machine virt,virtualization=on,gic-version=3 \
        -kernel ./linux /arch/arm64/boot/Image \
        -initrd busybox/initramfs_arm64.gz \
        -nographic \
        -chardev stdio,id=con,mux=on \
        -serial chardev:con \
        -mon chardev=con,mode=readline \
        -device edu \
        -D ./arm64_edu.txt

The edu mis irq not trigger; Is there any other PCI device that is more easy 
for test MSI for ARM gicv3 ?
Who can give me some idear or suggestions.

Thanks
YZHH
#/******本邮件及其附件含有小米公司的保密信息，仅限于发送给上面地址中列出的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本邮件！
 This e-mail and its attachments contain confidential information from XIAOMI, 
which is intended only for the person or entity whose address is listed above. 
Any use of the information contained herein in any way (including, but not 
limited to, total or partial disclosure, reproduction, or dissemination) by 
persons other than the intended recipient(s) is prohibited. If you receive this 
e-mail in error, please notify the sender by phone or email immediately and 
delete it!******/#