On 06/22/10 09:55, Peter Zijlstra wrote: > On Tue, 2010-06-22 at 15:47 +0800, Zhang, Yanmin wrote: >> Besides the para virt perf interface, I'm also considering the direct exposition >> of PMU hardware to guest os. > > NAK NAK NAK NAK, we've been over that, its not going to happen, full > stop! > > Use MSR read/write traps and host perf to emulate the hardware. In some > cases we could allow the reads without trap but that's a later > optimization. I believe whats meant here is a PMU compatible interface which is partially emulated. Not a handover of the PMU. Jes -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
