[PATCH 08/16] x86: Emergency virtualization disable function

[Eric W. Biederman]

Avi Kivity <avi at redhat.com> writes:

> Eduardo Habkost wrote:
>> We could move the set_virt_disable_func() calls to vmx.c and svm.c (on
>> hardware_setup/hardware_unsetup). One could argue that it is sort of a
>> coincidence that we need the code for both vmx and svm.
>>
>
> I don't share this fear of function calls, but perhaps that's due to lack of
> experience with kdump.

Mostly I'm just afraid of extra complexity.

> If you want to be extra simple and safe, remove kvm from the equation.  Make the
> disabling code part of kdump/emergency_restart and only rely on the convention
> that cr3.vmxe == vmxon.
Convention?

> That has the advantage of working with other virtualization systems as well.

Sounds good.

Eric