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
