[Lguest] [PATCH v3 01/11] x86/boot: enumerate documentation for the x86 hardware_subarch
mingo at kernel.org
Thu Feb 25 19:10:44 AEDT 2016
* Andy Lutomirski <luto at amacapital.net> wrote:
> On Feb 24, 2016 12:33 AM, "Ingo Molnar" <mingo at kernel.org> wrote:
> > For hard coded platform quirks I'd suggest we add x86_platform.quirks flags. For
> > example the F00F hack for Xen could be done via:
> > x86_platform.quirks.idt_remap = 0;
> Don't we unconditionally remap the IDT? I think Kees did it for
> general purpose hardening due to our complete inability to hide the
> IDT address. I.e. I think we can remove the f00f condition entirely.
Yeah, indeed - I only judged by the (limited) patch context and assumed the Xen
problem was with IDT remapping.
But what the quirk really does is only to avoid printing the f00f workaround -
i.e. a cosmetic change. I think we should just drop the paravirt_enabled() check.
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