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Date: Tue, 09 Sep 2014 02:21:20 -0400
From: Jon Masters <jcm@...hat.com>
To: Marc Zyngier <marc.zyngier@....com>,
Hanjun Guo <hanjun.guo@...aro.org>
CC: Tomasz Nowicki <tomasz.nowicki@...aro.org>,
Catalin Marinas <Catalin.Marinas@....com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Mark Rutland <Mark.Rutland@....com>,
Olof Johansson <olof@...om.net>,
"grant.likely@...aro.org" <grant.likely@...aro.org>,
"graeme.gregory@...aro.org" <graeme.gregory@...aro.org>,
Arnd Bergmann <arnd@...db.de>,
Sudeep Holla <Sudeep.Holla@....com>,
Will Deacon <Will.Deacon@....com>,
Jason Cooper <jason@...edaemon.net>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
Robert Richter <rric@...nel.org>,
Lv Zheng <lv.zheng@...el.com>,
Robert Moore <robert.moore@...el.com>,
Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
Liviu Dudau <Liviu.Dudau@....com>,
Randy Dunlap <rdunlap@...radead.org>,
Charles Garcia-Tobin <Charles.Garcia-Tobin@....com>,
"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 13/17] ARM64 / ACPI: Add GICv2 specific ACPI boot support
On 09/03/2014 06:30 AM, Marc Zyngier wrote:
> On 02/09/14 16:45, Hanjun Guo wrote:
>> This value is for max processors entries in MADT, and we will use it to scan MADT
>> for SMP/GIC Init, I just make it big enough for GICv3/4. since ACPI core will stop
>> scan MADT if the real numbers of processors entries are reached no matter
>> how big ACPI_MAX_GICV3_CPU_INTERFACE_ENTRIES is, I think we can just
>> define a number big enough then it will work (x86 and ia64 did the same thing).
>
> Also, with GICv3++, there is no such thing as a memory-mapped CPU
> interface anymore. What you get is a bunch of redistributors (one per
> CPU). I assume what you have here actually describe the redistributors,
> and its name should reflect that.
(though you could have a GICv3/v4 system providing a legacy GICv2(m)
compatibility mode having the CPU memory interfaces still defined)
Jon.
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