[PATCH 0/2] kvm: disable virtualization on kdump
Eric W. Biederman
ebiederm at xmission.com
Mon Oct 27 11:02:31 EDT 2008
Avi Kivity <avi at redhat.com> writes:
> Eric W. Biederman wrote:
> We've observed on some machines that keyboard controller reset didn't work, and
> that the fallback to triple-fault asserted INIT and not RESET (and that this
> INIT was blocked, hanging the machine). Switching to acpi reset worked on some
> machines, but not all. Either acpi reset was not implemented on the failing
> machines, or it was wired to INIT and not RESET.
Right. INIT does not reset things like the MTRRs, I had forgotten
Frequently the firmware when it regains control at 0xffffffff0
asserts reset, but if we can't get there. Ouch!
> Since we already have NMI IPIs, we could disable vmx there. If it is done
> unconditionally and without notifiers, there is no chance of having unreviewed
> surprises sneaking in.
Sounds good to me.
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