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Date: Tue, 09 Sep 2014 02:21:20 -0400
From: Jon Masters <jcm@redhat.com>
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To: Marc Zyngier <marc.zyngier@arm.com>, Hanjun Guo <hanjun.guo@linaro.org>
CC: Tomasz Nowicki <tomasz.nowicki@linaro.org>,
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Subject: Re: [PATCH v3 13/17] ARM64 / ACPI: Add GICv2 specific ACPI boot support
References: <1409583475-6978-1-git-send-email-hanjun.guo@linaro.org> <1409583475-6978-14-git-send-email-hanjun.guo@linaro.org> <5404AE56.80801@arm.com> <5405AE95.1020201@linaro.org> <5405BFE7.5060005@arm.com> <5405E626.4090306@linaro.org> <5406EDDC.3020208@arm.com>
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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.