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Date: Mon, 22 Dec 2014 09:07:24 +0000 From: Marc Zyngier <marc.zyngier@....com> To: Arnd Bergmann <arnd@...db.de>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org> CC: Mark Rutland <Mark.Rutland@....com>, Eddie Huang <eddie.huang@...iatek.com>, "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, Jason Cooper <jason@...edaemon.net>, Pawel Moll <Pawel.Moll@....com>, Ian Campbell <ijc+devicetree@...lion.org.uk>, Catalin Marinas <Catalin.Marinas@....com>, Olof Johansson <olof@...om.net>, Will Deacon <Will.Deacon@....com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Robert Richter <rrichter@...ium.com>, "srv_heupstream@...iatek.com" <srv_heupstream@...iatek.com>, Rob Herring <robh+dt@...nel.org>, Sascha Hauer <kernel@...gutronix.de>, Kumar Gala <galak@...eaurora.org>, Matthias Brugger <matthias.bgg@...il.com>, "Joe.C" <yingjoe.chen@...iatek.com>, Thomas Gleixner <tglx@...utronix.de>, Mark Brown <broonie@...aro.org> Subject: Re: [PATCH v2 3/4] arm64: dts: Add mediatek MT8173 SoC and evaluation board dts and Makefile On 20/12/14 20:07, Arnd Bergmann wrote: > On Wednesday 17 December 2014 15:01:29 Marc Zyngier wrote: >> >> Indeed, as described in the documentation: >> http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0471b/CHDIFAEE.html >> >> Also it is worth noticing that given how GICV is placed, it will never >> work with 64K pages and virtualization. Pretty sad. > > Does this mean no VGIC support on this platform so you have to emulate it > in order to run virtual machines with 64K pages, or does it mean that > it's impossible to use that way because you can't emulate it? As Peter said, this is not a configuration we're willing to support: - we don't have a API to tell userspace emulation about interrupts generated by the generic timers - we could move the whole GIC emulation into the kernel (at the moment, only the distributor is there), but that would be a complete nightmare It really looks like a case of "let's drop a bunch of 64bit cores into an existing SoC". Shame people can't read integration guidelines... M. -- Jazz is not dead. It just smells funny... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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