From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christopher Covington <cov@codeaurora.org>
Subject: Re: [RFC v2] ARM VM System Specification
Date: Tue, 10 Jun 2014 13:04:40 -0400
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References: <20140328184517.GA27219@cbox> <CAFEAcA-isiLax0UASTMkedwGXWOaBdR7N1t2o87XYDkj5nt5ig@mail.gmail.com>
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Cc: Christoffer Dall <christoffer.dall@linaro.org>,
	"cross-distro@lists.linaro.org" <cross-distro@lists.linaro.org>,
	Ian Campbell <ian.campbell@citrix.com>,
	kvm-devel <kvm@vger.kernel.org>,
	Michael Casadevall <Michael.casadevall@linaro.org>,
	"marc.zyngier@arm.com" <marc.zyngier@arm.com>,
	Rob Herring <rob.herring@linaro.org>,
	"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>,
	Stefano Stabellini <stefano.stabellini@citrix.com>,
	Grant Likely <grant.likely@linaro.org>,
	"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
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To: Peter Maydell <peter.maydell@linaro.org>
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Hi Peter,

On 06/10/2014 10:42 AM, Peter Maydell wrote:
> On 28 March 2014 18:45, Christoffer Dall <christoffer.dall@linaro.org> wrote:
>> ARM VM System Specification
>> ===========================
>>
> 
>> The virtual hardware platform must provide a number of mandatory
>> peripherals:
>>
>>   Serial console:  The platform should provide a console,
>>   based on an emulated pl011, a virtio-console, or a Xen PV console.
>>
>>   An ARM Generic Interrupt Controller v2 (GICv2) [3] or newer.  GICv2
>>   limits the the number of virtual CPUs to 8 cores, newer GIC versions
>>   removes this limitation.
>>
>>   The ARM virtual timer and counter should be available to the VM as
>>   per the ARM Generic Timers specification in the ARM ARM [1].
> 
> I just noticed that this doesn't mandate that the platform
> provides an RTC. As I understand it, the UEFI spec mandates
> that there's an RTC (could somebody more familiar with UEFI
> than me confirm/deny that?) so we should probably put one here.

Pardon my ignorance, but what exactly disqualifies Generic Timer
implementations from being used as Real Time Clocks?

Thanks,
Christopher

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