State of debug register emulation

Jan Kiszka
2008-04-29T13:07:25Z

Hi,

looks like we are getting better and better here in hitting yet
unsupported corner-case features of KVM :). This time our guest fiddles
with hardware debugging registers, but quickly gets unhappy as they do
not yet have the expected effect.

Joerg, I found you SVM-related patch series in the archive which does
not seem to have raised much responses. Is this general direction OK?
Does it allow self-debugging of guests? But how are conflicts resolved
if both guest and host need the physical registers (host debugging the
guest which is debugging itself)?

I would try to dig into the VMX side if the general architecture is
-mostly- clear. [ Sorry, Joerg, someone put the latter type of HW on my
desk :->. Hope I can once check our stuff against SVM as well! ]

Thanks,