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. Jan
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