On Sat, Jul 30, 2022 at 12:02:34AM +0200, Borislav Petkov wrote: > On Fri, Jul 29, 2022 at 02:46:27PM -0700, Pawan Gupta wrote: > > Let me see if there is a way to distinguish between 4. and 5. below: > > > > CPU category X86_BUG_MMIO_STALE_DATA X86_BUG_MMIO_UNKNOWN > > ----------------------------------------------------------------------------------------------- > > 1. Known affected (in cpu list) 1 0 > > 2. CPUs with HW immunity (MMIO_NO=1) 0 0 > > 3. Other vendors 0 0 > > 4. Older Intel CPUs 0 1 > > 5. Not affected current CPUs (but MMIO_NO=0) 0 ? > > Not affected current CPUs should be arch_cap_mmio_immune() == true, no? That would be true in most cases, with some exceptions like systems that did not update the microcode.
