> On Sep 20, 2019, at 12:44 PM, Jim Mattson <jmattson@xxxxxxxxxx> wrote: > > On Fri, Sep 20, 2019 at 12:36 PM Krish Sadhukhan > <krish.sadhukhan@xxxxxxxxxx> wrote: >> On 9/19/19 4:02 PM, Jim Mattson wrote: >>> Ensure that support for RDPRU is not enumerated in the guest's CPUID >>> and that the RDPRU instruction raises #UD. >> >> >> The AMD spec says, >> >> "When the CPL>0 with CR4.TSD=1, the RDPRUinstruction will >> generate a #UD fault." >> >> So we don't need to check the CR4.TSD value here ? > > KVM should set CPUID Fn8000_0008_EBX[RDPRU] to 0. > > However, I should modify the test so it passes (or skips) on hardware. :-) Thanks for making this exception. Just wondering: have you or anyone else used this functionality - of running tests on bare-metal? I ask because it would also save me the trouble of checking (occasionally) that nothing broke.
