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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