Re: [PATCH V2 1/5] ara virt interface of perf to support kvm guestos statistics collection in guest os

[Peter Zijlstra]

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.
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