From mboxrd@z Thu Jan 1 00:00:00 1970 From: cov@codeaurora.org (Christopher Covington) Date: Tue, 10 Jun 2014 13:04:40 -0400 Subject: [RFC v2] ARM VM System Specification In-Reply-To: References: <20140328184517.GA27219@cbox> Message-ID: <53973AA8.9020301@codeaurora.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Peter, On 06/10/2014 10:42 AM, Peter Maydell wrote: > On 28 March 2014 18:45, Christoffer Dall 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 -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation.