Il 17/09/2012 19:20, Peter Maydell ha scritto: >> > Couldn't that mean simply that the tb for instance wasn't mapped >> > anywhere? That's the KVM case, at least. > Hmm. For TCG there are certainly some cases where failure to > cpu_restore_state() means that the current CPU state is now broken; > that should be fatal (and I'm not sure there are any cases where > failure is OK. I think calls are generally protected by > checking that tb_find_pc() returned non-NULL, so we shouldn't > be trying to restore state unless we really were in the middle > of a TB that we know about and can translate.) > > I'm not sure what the TB concept means for KVM -- after all KVM > doesn't do any translation...
Nothing, but in some cases cpu_restore_state() is called from exception handling helpers or something like that. My knowledge is spotty. Paolo
