On 05.05.2020 10:17, Jan Beulich wrote: > AMD's PM specifies that MPERF (and its r/o counterpart) reads are > affected by the TSC ratio. Hence when processing such reads in software > we too should scale the values. While we don't currently (yet) expose > the underlying feature flags, besides us allowing the MSRs to be read > nevertheless, RDPRU is going to expose the values even to user space. > > Furthermore, due to the not exposed feature flags, this change has the > effect of making properly inaccessible (for reads) the two MSRs. > > Note that writes to MPERF (and APERF) continue to be unsupported. > > Signed-off-by: Jan Beulich <jbeul...@suse.com>
Sorry, just re-sent this one with correct numbering. Jan
