[PATCH 0/2] kvm: disable virtualization on kdump

[Eric W. Biederman]

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
that distinction.

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.

Eric