linux-kernel - Re: [PATCH v6 01/17] ACPI / processor: Convert apic_id to phys

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Message-ID: <54AD0125.9060601@linaro.org>
Date:	Wed, 07 Jan 2015 17:49:25 +0800
From:	Hanjun Guo <hanjun.guo@...aro.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
CC:	Catalin Marinas <catalin.marinas@....com>,
	Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>,
	Mark Rutland <mark.rutland@....com>,
	Grant Likely <grant.likely@...aro.org>,
	Will Deacon <will.deacon@....com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Sudeep Holla <Sudeep.Holla@....com>,
	Jon Masters <jcm@...hat.com>,
	Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
	Robert Richter <rric@...nel.org>,
	Randy Dunlap <rdunlap@...radead.org>,
	Charles.Garcia-Tobin@....com, phoenix.liyi@...wei.com,
	Timur Tabi <timur@...eaurora.org>,
	suravee.suthikulpanit@....com, linux-acpi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linaro-acpi@...ts.linaro.org, Hanjun Guo <hanjun.guo@...aro.com>
Subject: Re: [PATCH v6 01/17] ACPI / processor: Convert apic_id to phys_id
 to make it arch agnostic

On 2015年01月07日 09:50, Rafael J. Wysocki wrote:
> On Sunday, January 04, 2015 06:55:02 PM Hanjun Guo wrote:
>> From: Hanjun Guo <hanjun.guo@...aro.com>
>>
>> apic_id in MADT table is the CPU hardware id which identify
>> it self in the system for x86 and ia64, OSPM will use it for
>> SMP init to map APIC ID to logical cpu number in the early
>> boot, when the DSDT/SSDT (ACPI namespace) is scanned later, the
>> ACPI processor driver is probed and the driver will use acpi_id
>> in DSDT to get the apic_id, then map to the logical cpu number
>> which is needed by the processor driver.
>>
>> Before ACPI 5.0, only x86 and ia64 were supported in ACPI spec,
>> so apic_id is used both in arch code and ACPI core which is
>> pretty fine. Since ACPI 5.0, ARM is supported by ACPI and
>> APIC is not available on ARM, this will confuse people when
>> apic_id is both used by x86 and ARM in one function.
>>
>> So convert apic_id to phys_id (which is the original meaning)
>> in ACPI processor dirver to make it arch agnostic, but leave the
>> arch dependent code unchanged, no functional change.
>>
>> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
>
> I've queued up this one and [2/17] for 3.19-rc4 as I promised I'd push these
> two for 3.19.

Great, thanks a lot. I thought you will queued them for 3.20 :)

Regards
Hanjun
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