RE: [PATCH v2 4/4] x86: vmx: Allow direct access to MSR_IA32_ARCH_CAPABILITIES

[Van De Ven, Arjan]

> On 29/01/2018 01:58, KarimAllah Ahmed wrote:
> > Add direct access to MSR_IA32_SPEC_CTRL for guests. Future intel processors
> > will use this MSR to indicate RDCL_NO (bit 0) and IBRS_ALL (bit 1).
> 
> This has to be customizable per-VM (similar to the patches Amazon posted
> a while ago for UCODE_REV for example).  It's not urgent anyway given
> that no processor has it yet.


Apollo lake has it once you update the microcode.