From mboxrd@z Thu Jan  1 00:00:00 1970
From: Shannon Zhao <zhaoshenglong@huawei.com>
Subject: Re: [PATCH v9 19/21] KVM: ARM64: Add a new feature bit for PMUv3
Date: Tue, 26 Jan 2016 11:40:25 +0800
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Cc: Andrew Jones <drjones@redhat.com>,
	"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Christoffer Dall <christoffer.dall@linaro.org>,
	arm-mail-list <linux-arm-kernel@lists.infradead.org>,
	kvm-devel <kvm@vger.kernel.org>,
	"Will Deacon" <will.deacon@arm.com>, Wei Huang <wei@redhat.com>,
	"Christopher Covington" <cov@codeaurora.org>,
	Shannon Zhao <shannon.zhao@linaro.org>,
	"Huangpeng (Peter)" <peter.huangpeng@huawei.com>,
	<hangaohuai@huawei.com>
To: Peter Maydell <peter.maydell@linaro.org>
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On 2016/1/26 0:47, Peter Maydell wrote:
> On 19 January 2016 at 07:10, Shannon Zhao <zhaoshenglong@huawei.com> wrote:
>> > Yes, for checking the CAP true/false is enough. Maybe I think the number
>> > of host counters could be useful for QEMU to know the number and for
>> > supporting cross-type vcpu, but I'm not sure. If someone else has no
>> > other suggestion, I will change it to what you suggest.
> Do we care about the number of host counters?
Currently we don't care about it. Anyway it could be added if it's
necessary in the future.

> We might want to
> know how many counters the guest sees, but we can do that by
> using KVM_GET_ONE_REG to look at the guest PMCR_EL0, right?
Yes, right.

-- 
Shannon