Hello, c/s 350bc1a9d4 "x86: support newer Intel CPU models" changed the set of MSRs read by Xeon Broadwell hardware (specifically, model 79 / 0x47).
Rereading the manual, it does indeed indicate that this MSR is available. However, experimentally it is not. All Broadwell hardware XenServer has (both SDPs and production systems) reliably take a #GP fault when trying to read this MSR. Haswell hardware appears fine (and indeed, was reading that MSR before). Intel: Please can you confirm whether the documentation is correct? If it is, do you have any idea why the MSR might not be available? I can't spot anything relevant in the platform errata documents. Thanks, ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
