[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: kern/54143 (kernel crashes with amd64 CURRENT iso in virtualbox)
Basically it faults on rdmsr(MSR_LS_CFG2), which means the MSR does not
exist in VirtualBox. Three things that I find surprising:
* At the beginning of x86_errata() we leave if there is a hypervisor, yet in
your case it seems we don't leave. Maybe it means VirtualBox does not set
* The rdmsr is not incorrect, it corresponds to errata #1091, which does
affect PiR-B2 (0x800f82, your CPU). The AMD spec says the workaround
should be "Program MSRC001_102D to 1b". That's exactly what we're
doing, so there is no apparent reason for it to fault, except if VirtualBox
does not whitelist it correctly.
* It looks like we are the only ones to apply this errata, I don't see it in
Linux or any of the other BSDs. Maybe we shouldn't be applying it?
I think I will add #if0 around this errata for now.
Main Index |
Thread Index |