Re: [PATCH v8 00/20] KVM: ARM64: Add guest PMU support

[Marc Zyngier <marc.zyngier@arm.com>]

On 07/01/16 14:12, Will Deacon wrote:
> On Thu, Jan 07, 2016 at 02:10:38PM +0000, Marc Zyngier wrote:
>> On 22/12/15 08:07, Shannon Zhao wrote:
>>> From: Shannon Zhao <shannon.zhao@linaro.org>
>>>
>>> This patchset adds guest PMU support for KVM on ARM64. It takes
>>> trap-and-emulate approach. When guest wants to monitor one event, it
>>> will be trapped by KVM and KVM will call perf_event API to create a perf
>>> event and call relevant perf_event APIs to get the count value of event.
>>>
>>> Use perf to test this patchset in guest. When using "perf list", it
>>> shows the list of the hardware events and hardware cache events perf
>>> supports. Then use "perf stat -e EVENT" to monitor some event. For
>>> example, use "perf stat -e cycles" to count cpu cycles and
>>> "perf stat -e cache-misses" to count cache misses.
>>
>> I finally feel like we're pretty close to something we could merge. My
>> current concerns are:
> 
> The merge window opens on Monday and I'm not prepared to take further
> PMU changes at this point (unless they're bug fixes, of course).
> 
> This needs to wait until 4.6.

Fair enough. I guess I'll continue the review process and queue that
early in the next cycle.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...