Jan Kiszka wrote: > Marcelo Tosatti wrote: >> On Sun, Sep 06, 2009 at 02:50:00PM +0700, Antoine Martin wrote: >>> -----BEGIN PGP SIGNED MESSAGE----- >>> Hash: SHA512 >>> >>> [snip] >>>>> Is this an AMD host? >>>> Nope, Intel Core2, more host info : >>> I have put all the relevant binaries and their config files here: >>> http://uml.devloop.org.uk/kvmbug/ >>> Host kernel, qemu binary, kvm guest kernel and the UML binary I have >>> used for bisecting. >> Antoine, >> >> Works for me with master branch. Its likely this commit fixed it: >> >> commit 76d4622776d007de3f90f311591babc5f6ba6f39 >> Author: Avi Kivity <avi@xxxxxxxxxx> >> Date: Tue Sep 1 12:03:25 2009 +0300 >> >> KVM: VMX: Check cpl before emulating debug register access >> >> Debug registers may only be accessed from cpl 0. Unfortunately, vmx will >> code to emulate the instruction even though it was issued from guest >> userspace, possibly leading to an unexpected trap later. >> >> It will be included in 2.6.30 / 2.6.27 stable (.29 is not maintained >> anymore). > > Easy to check: Does the UML image still contain mov-to-db instructions? > If not, this commit cannot make the difference. I'd be happy to grep it if you give me the mov-to-db opcode. Anyway, I am happy to report that upgrading the host to 2.6.31 prevents the guests from crashing. Antoine -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
