On Sun, 2023-01-29 at 17:11 +0900, Tetsuo Handa wrote: > On 2023/01/29 15:00, Zack Rusin wrote: > > On Sat, 2023-01-28 at 20:44 +0900, Tetsuo Handa wrote: > > > Hello. > > > > > > I noticed that a kernel built with vmwgfx driver fails to boot a Linux guest > > > on Oracle VM VirtualBox 7.0.4 on Windows 11 on DELL Inspiron 14 5420. > > > I didn't notice this problem when I booted an older kernel on an older version > > > of Oracle VM VirtualBox on Windows 8.1 on an older PC. > > > > > > The location that crashes is > > > > > > VMW_PORT(VMW_PORT_CMD_OPEN_CHANNEL, > > > (protocol | GUESTMSG_FLAG_COOKIE), si, di, > > > 0, > > > VMW_HYPERVISOR_MAGIC, > > > eax, ebx, ecx, edx, si, di); > > > > > > in vmw_open_channel(). It might be that some changes in VirtualBox side > > > is conflicting with how VMware tries to test if the guest is VMware. > > > How can I debug this problem? > > > > You'd have to figure out what exactly is the problem. I couldn't reproduce it on > > vmware hypervisors with your .config. > > This problem happens on not VMware hypervisors but VirtualBox hypervisors. Yea, that's why I can't debug it myself and would need someone else to figure out the exact issue. > > > FWIW that code has been there and hasn't > > been > > changed in years. Oracle emulated svga device always had problems, was never > > supported by vmwgfx and afaict is not maintained by Oracle so I'd strongly > > suggest > > that you switch to some other graphics device on virtualbox. > > Indeed, not selecting VMSVGA as Graphics Controller in the screen tab of display > setting allowed me to boot the guest. > > The reason I built-in vmwgfx is that I want to reuse the same kernel configuration > on > multiple environments; syzbot uses a large kernel configuration that builts-in > almost > everything. Building vmwgfx is great, it's selecting the vmsvga device in virtualbox that's the problem. afaict that device is unmaintained and unsupported. > > In the meantime I think the attached patch should at least get you booting. You > > can > > give it a try and if it works I can push it sometime this week. > > Yes, this patch allowed me to boot the guest when selecting VMSVGA as Graphics > Controller. > > Thank you. Great. I'll clean it up and send it for review to dri-devel sometime this week. z
