Re: [Qemu-devel] [PATCH QEMU] Patches for new AMD CPU bits.

[Eduardo Habkost]

On Fri, Jun 01, 2018 at 11:38:07AM -0400, Konrad Rzeszutek Wilk wrote:
> Hi!
> 
> 
> I was reading the AMD whitepaper on SSBD and noticed that they have added
> two new bits in the 8000_0008 CPUID. EBX:
>  1) Bit[26] - similar to Intel's SSB_NO not needed anymore.
>  2) Bit[24] - use SPEC_CTRL MSR (0x48) instead of VIRT SPEC_CTRL MSR
>     (0xC001_011f).
> 
> See 124441_AMD64_SpeculativeStoreBypassDisable_Whitepaper_final.pdf
> A copy of this document is available at
>         https://bugzilla.kernel.org/show_bug.cgi?id=199889
> 
> These two patches along with the kernel ones allow us to expose those
> two bits to the guest.

Queued on x86-next, thanks!

-- 
Eduardo