On Fri, Aug 19, 2022, Like Xu wrote: > From: Like Xu <likexu@xxxxxxxxxxx> > > This unit-test is intended to test the KVM's support for > the Processor Event Based Sampling (PEBS) which is another > PMU feature on Intel processors (start from Ice Lake Server). > > If a bit in PEBS_ENABLE is set to 1, its corresponding counter will > write at least one PEBS records (including partial state of the vcpu > at the time of the current hardware event) to the guest memory on > counter overflow, and trigger an interrupt at a specific DS state. > The format of a PEBS record can be configured by another register. > > These tests cover most usage scenarios, for example there are some > specially constructed scenarios (not a typical behaviour of Linux > PEBS driver). It lowers the threshold for others to understand this > feature and opens up more exploration of KVM implementation or > hw feature itself. > > Signed-off-by: Like Xu <likexu@xxxxxxxxxxx> I responded to the previous version, didn't realize it got merged in with this series (totally fine, I just missed it). I think all my feedback still applies. https://lore.kernel.org/all/Yz3XiP6GBp95YEW9@xxxxxxxxxx
