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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m testing gpu passthrough on KVM with NVIDIA gpu card(M60, 10de:13f2) based on vfio. And I noticed the function
<span style="color:#0070C0">vfio_nvidia_bar0_mirror_quirk </span>in qemu/hw/vfio/pci-quirks.c, could someone please explain the aim of these codes in detail to me? I don’t think it is necessary if we don’t need read config address through this backdoor. If
I just don’t do these quirks, what negative results could be caused?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I use the simple code to read the offset from 0x88000 to 0x88fff in bar0 , and found that:<o:p></o:p></p>
<p class="MsoNormal">On the host, the partial result like that, what does the error code badf5040 represent list below?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">13f210de 00100007 030000a1 00000000 93000000 1000000c 0000183e 2000000c<o:p></o:p></p>
<p class="MsoNormal">0000183e 00002001 00000000 115e10de 00000000 00000060 00000000 00000107<o:p></o:p></p>
<p class="MsoNormal">115e10de badf5040 badf5040 badf5040 00000003 00000001 0023d6ce 00000000<o:p></o:p></p>
<p class="MsoNormal">00036801 00000008 00807805 fee00718 00000000 00000000 00020010 00648de1<o:p></o:p></p>
<p class="MsoNormal">00002137 08453103 11010100 00000000 00000000 badf5040 badf5040 00040013<o:p></o:p></p>
<p class="MsoNormal">00000000 0000000e 001e0003 00000000 00000000 01140009 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040<o:p></o:p></p>
<p class="MsoNormal">badf5040 badf5040 badf5040 badf5040 00000002 badf5040 badf5040 badf5040<o:p></o:p></p>
<p class="MsoNormal">25810002 00000000 00000000 00000000 00000000 800000ff 00000000 badf5040<o:p></o:p></p>
<p class="MsoNormal">badf5040 badf5040 42010004 00000000 00078121 00000000 badf5040 badf5040<o:p></o:p></p>
<p class="MsoNormal">badf5040 01000030 badf5040 8b00001b e0000195 06507120 badf5040 00078121<o:p></o:p></p>
<p class="MsoNormal">00058121 00038002 00018002 001f8006 001d8006 badf5040 badf5040 badf5040<o:p></o:p></p>
<p class="MsoNormal">badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040<o:p></o:p></p>
<p class="MsoNormal">badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040<o:p></o:p></p>
<p class="MsoNormal">badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040<o:p></o:p></p>
<p class="MsoNormal">badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040<o:p></o:p></p>
<p class="MsoNormal">badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040<o:p></o:p></p>
<p class="MsoNormal">badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040 badf5040<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">but, if I use the code on the vm with gpupassthough, it runs ok.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">13f210de 00100103 030000a1 00000000 fd000000 e000000c 00000000 f200000c<o:p></o:p></p>
<p class="MsoNormal">00000000 0000c101 00000000 115e10de 00000000 00000060 00000000 0000010a<o:p></o:p></p>
<p class="MsoNormal">115e10de 00000000 00000000 00000000 00000002 00000001 0023d6ce 00000000<o:p></o:p></p>
<p class="MsoNormal">00036801 00000008 00807805 00000000 00000000 00000000 00020010 00648de1<o:p></o:p></p>
<p class="MsoNormal">00002137 08454103 11030100 00000000 00000000 00000000 00000000 00040813<o:p></o:p></p>
<p class="MsoNormal">00000000 0000000e 001e0003 00000000 00000000 01140009 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 00000000 00000000 00000002 00000000 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">25010002 00000000 00000000 00000000 00000000 800000ff 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 42010004 00000000 00078121 00000000 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000010 00000000 0b00001b e0000195 06507120 00000000 00078121<o:p></o:p></p>
<p class="MsoNormal">00058121 00038002 00018002 001f8006 001d8006 00000000 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000<o:p></o:p></p>
<p class="MsoNormal">00000000 00000000 00000000 00000000 12810018 00000000 1281001e 00000010<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span lang="ZH-CN" style="font-size:12.0pt;font-family:宋体">华为技术有限公司</span><span style="font-size:12.0pt;font-family:宋体"> Huawei Technologies Co., Ltd.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:宋体"><img width="102" height="32" id="图片_x0020_2" src="cid:image001.png@01D2C5C3.795899F0" alt="Company_logo"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-size:12.0pt;font-family:宋体">个人签名：邬宗勇</span><span style="font-size:12.0pt;font-family:宋体"><br>
<span lang="ZH-CN">手 机：</span>15656583887<br>
<span lang="ZH-CN">电子邮件：</span>wuzongyong1@huawei.com<o:p></o:p></span></p>
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