Jeremy Fitzhardinge wrote:> Well, the PDA stuff took a bit longer to settle down than I would have > hoped, but it seems fairly sound now. > > I just committed the changes needed to make Xen happy with the PDA, > which means making sure an appropriate GDT is set up early enough. > > I also seem to have avoided most of the APIC issues under Xen by > simply making the cpuid not report the presence of an APIC. > > With these in place, things are getting fairly far, but not to > usermode. It often gets as far as trying to mount root, but it fails; > I haven't investigated that yet. But it also frequently crashes > before then, depending on when it gets an interrupt. I'm trying to > work out what's happening here, but the symptom is eip == 0x00000001 (!).Bad patches? I put code in vmi.c to patch IRET and SYSEXIT EIPs to 0x1 and 0x2, respectively, once upon a time. Maybe it migrated over to you somehow?
Well, the PDA stuff took a bit longer to settle down than I would have
hoped, but it seems fairly sound now.
I just committed the changes needed to make Xen happy with the PDA,
which means making sure an appropriate GDT is set up early enough.
I also seem to have avoided most of the APIC issues under Xen by simply
making the cpuid not report the presence of an APIC.
With these in place, things are getting fairly far, but not to
usermode. It often gets as far as trying to mount root, but it fails; I
haven't investigated that yet. But it also frequently crashes before
then, depending on when it gets an interrupt. I'm trying to work out
what's happening here, but the symptom is eip == 0x00000001 (!).
Chris, what local hacks do you have in your tree?
j
* Jeremy Fitzhardinge (jeremy@goop.org) wrote:> Well, the PDA stuff took a bit longer to settle down than I would have > hoped, but it seems fairly sound now. > > I just committed the changes needed to make Xen happy with the PDA, > which means making sure an appropriate GDT is set up early enough. > > I also seem to have avoided most of the APIC issues under Xen by simply > making the cpuid not report the presence of an APIC. > > With these in place, things are getting fairly far, but not to > usermode. It often gets as far as trying to mount root, but it fails; I > haven't investigated that yet. But it also frequently crashes before > then, depending on when it gets an interrupt. I'm trying to work out > what's happening here, but the symptom is eip == 0x00000001 (!).Haven't seen that one.> Chris, what local hacks do you have in your tree?Essentially all the local hacks I have are for debugging. There was one bit which was just for apic clock setup. But the symptom w/out that was a hang, not a crash. They're also on a remote machine that has apparently died. Re-tooling locally ATM. thanks, -chris