Re: [PATCH v2 5/5] x86/pti: Do not enable PTI on fixed Intel processors

Woodhouse, David
2018-01-23T18:44:49Z

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On Tue, 2018-01-23 at 10:41 -0800, Dave Hansen wrote:
> On 01/23/2018 08:52 AM, David Woodhouse wrote:
> > When they advertise the IA32_ARCH_CAPABILITIES MSR and it has the RDCL_NO
> > bit set, they don't need KPTI either.
>
> Also, I hate to ask...  Have you tested this patch?

Nope. I deliberately haven't implemented IBRS_ALL because I have no
suitable hardware for that and there are some non-trivial parts, but
this one really *should* be trivial so seemed OK to do without
hardware.

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