linux-kernel - Re: [PATCH v10 16/21] irqchip: Add GICv2 specific ACPI boot support

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Date:	Sat, 14 Mar 2015 18:44:20 +0000
From:	Jason Cooper <jason@...edaemon.net>
To:	Hanjun Guo <hanjun.guo@...aro.org>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Will Deacon <will.deacon@....com>,
	Olof Johansson <olof@...om.net>,
	Grant Likely <grant.likely@...aro.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Mark Rutland <mark.rutland@....com>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Sudeep Holla <Sudeep.Holla@....com>,
	Jon Masters <jcm@...hat.com>,
	Marc Zyngier <marc.zyngier@....com>,
	Mark Brown <broonie@...nel.org>,
	Robert Richter <rric@...nel.org>,
	Timur Tabi <timur@...eaurora.org>,
	Ashwin Chaugule <ashwinc@...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,
	Tomasz Nowicki <tomasz.nowicki@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v10 16/21] irqchip: Add GICv2 specific ACPI boot support

On Wed, Mar 11, 2015 at 08:39:42PM +0800, Hanjun Guo wrote:
> From: Tomasz Nowicki <tomasz.nowicki@...aro.org>
> 
> ACPI kernel uses MADT table for proper GIC initialization. It needs to
> parse GIC related subtables, collect CPU interface and distributor
> addresses and call driver initialization function (which is hardware
> abstraction agnostic). In a similar way, FDT initialize GICv1/2.
> 
> NOTE: This commit allow to initialize GICv1/2 basic functionality.
> While now simple GICv2 init call is used, any further GIC features
> require generic infrastructure for proper ACPI irqchip initialization.
> That mechanism and stacked irqdomains to support GICv2 MSI/virtualization
> extension, GICv3/4 and its ITS are considered as next steps.
> 
> CC: Jason Cooper <jason@...edaemon.net>
> CC: Marc Zyngier <marc.zyngier@....com>
> CC: Thomas Gleixner <tglx@...utronix.de>
> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
> Tested-by: Yijing Wang <wangyijing@...wei.com>
> Tested-by: Mark Langsdorf <mlangsdo@...hat.com>
> Tested-by: Jon Masters <jcm@...hat.com>
> Tested-by: Timur Tabi <timur@...eaurora.org>
> Tested-by: Robert Richter <rrichter@...ium.com>
> Acked-by: Robert Richter <rrichter@...ium.com>
> Reviewed-by: Grant Likely <grant.likely@...aro.org>
> Signed-off-by: Tomasz Nowicki <tomasz.nowicki@...aro.org>
> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
> ---
>  arch/arm64/include/asm/acpi.h        |   2 +
>  arch/arm64/include/asm/irq.h         |  13 +++++
>  arch/arm64/kernel/acpi.c             |  25 +++++++++
>  drivers/irqchip/irq-gic.c            | 102 +++++++++++++++++++++++++++++++++++
>  drivers/irqchip/irqchip.c            |   3 ++
>  include/linux/acpi_irq.h             |  10 ++++
>  include/linux/irqchip/arm-gic-acpi.h |  31 +++++++++++
>  7 files changed, 186 insertions(+)
>  create mode 100644 include/linux/acpi_irq.h
>  create mode 100644 include/linux/irqchip/arm-gic-acpi.h

Acked-by: Jason Cooper <jason@...edaemon.net>

thx,

Jason.
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