<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#002060;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="color:#1F497D">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I obviously carried on with my investigation after sending the original email, and have figured out what is triggering this abort (not really fair to call it a crash).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">When the BIOS starts initializing the PCI Configuration space for my PCIe switch, it reads the secondary bus register (PCI CFG 0x19) before it’s been initialized, so the device model is returning 0. This puts
the BIOS into a loop, repeating the following over 5000 times before aborting the VM session.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Courier New"">PCI CFG Root Rd 0x0a L 2 = 0x0604 // Class<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Courier New"">PCI CFG Root Rd 0x00 L 2 = 0x14ab // VendID<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Courier New"">PCI CFG Root Rd 0x02 L 2 = 0x1000 // DevID<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Courier New"">PCI CFG Root Wr 0x1c L 1 = 0xd0 // IOBase<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Courier New"">PCI CFG Root Wr 0x20 L 2 = 0xf000 // MemBase<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Courier New"">PCI CFG Root Rd 0x19 L 1 =
<b><span style="color:#C00000">0x00</span></b> // SecBus<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">If I intercept the secondary bus register read, and return a 3 instead of reading 0 from RTL, then it carries on with root configuration and my VM boots and runs correctly. It’s not detecting the downstream
end point, but that is a separate issue.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">Meanwhile, does it make sense for the BIOS to read the secondary bus register
</span><span style="color:#1F497D">before it’s been initialized? It seems like that register should be set up as the BIOS proceeds through the enumeration. That is what the VM with PIIX3 chipset does.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">_____________________________________________<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#002060"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="color:#002060">Ric Vilbig</span></b><span style="color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060">Mentor Graphics, Emulation Division</span><span style="font-size:10.0pt;color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060">46871 Bayside Parkway, Fremont CA, 94538<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060">Phone: 510-354-7360<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060">Mobile: 408-529-2365<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060">email: <a href="mailto:ric_vilbig@mentor.com">
ric_vilbig@mentor.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Vilbig, Ric
<br>
<b>Sent:</b> Tuesday, March 29, 2016 11:40<br>
<b>To:</b> vbox-dev@virtualbox.org<br>
<b>Cc:</b> Vilbig, Ric<br>
<b>Subject:</b> VM crash, NS_ERROR_FAILURE<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#002060">Hi experts,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">I would like to ask for some help to figure out why a certain VM crashes on start-up. Although the problem is evidently induced by my PDM plug-in, the crash does not appear to be happening therein. I need some
help to root cause where VBox is aborting the VM session.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">> VBoxManage startvm "U14_ICH9_2"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">Waiting for VM "U14_ICH9_2" to power on...<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">VBoxManage: error: The VM session was aborted<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component SessionMachine, interface ISession<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">I created this VM from the VirtualBox GUI, v5.0.16, which I built from the tarball at
<a href="https://www.virtualbox.org/wiki/Downloads">https://www.virtualbox.org/wiki/Downloads</a> and am running on an Ubuntu 14 host. Then I switched the chipset to ICH9, then I installed Ubuntu 14 as the guest. The VM runs well, until I plug my virtual
device model into PDM (it’s a PCIe switch with downstream endpoint). After plugging in my virtual device, the VM crashes as shown above.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">I tracked down everywhere NS_ERROR_FAILURE is mentioned in the sources. I found that DirectoryServiceProvider::GetFile() returns that error twice, right away, but that is also true in the working case when my
device is unplugged. In no other place is that specific error ever returned or asserted. However, I found that E_FAIL is #defined to NS_ERROR_FAILURE, and there are hundreds of references to E_FAIL, so I gave up trying to instrument them all.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">I need some help to root cause this problem. Log files show that it is getting as far as BIOS starting to initialize the switch, apparently stuck in a loop doing that, but then lights out with no trail that
I can follow.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">Log files are attached. Lines bearing the “RicV” prefix were instrumented by me to investigate this problem. Lines bearing the “RemDev” prefix are coming from my PDM plug-in.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">_____________________________________________<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#002060"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="color:#002060">Ric Vilbig</span></b><span style="color:#002060"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060">Mentor Graphics, Emulation Division<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060">46871 Bayside Parkway, Fremont CA, 94538<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060">Phone: 510-354-7360<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060">Mobile: 408-529-2365<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060">email: <a href="mailto:ric_vilbig@mentor.com">
ric_vilbig@mentor.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
</body>
</html>