[PATCH v5 4/6] irqchip, gicv3-its: Add HW revision detection and configuration

[Marc Zyngier]

On Mon, 21 Sep 2015 22:58:37 +0200
Robert Richter <rric at kernel.org> wrote:

> From: Robert Richter <rrichter at cavium.com>
> 
> Some GIC revisions require an individual configuration to esp. add
> workarounds for HW bugs. This patch implements generic code to parse
> the hw revision provided by an IIDR register value and runs specific
> code if hw matches. A function is added that reads the IIDR registers
> for ITS (GITS_IIDR) and then goes through a list of init functions to
> be called for specific versions. Same could be done for GICV3
> (GICD_IIDR), but there are no users yet for it.
> 
> The patch is needed to implement workarounds for HW errata in Cavium's
> ThunderX GICV3 ITS.
> 
> v5:
>  * renamed caps names to quirk
> 
> v4:
>  * only enable hw detection for its in its_enable_quirks()
>  * removed gicv3_check_capabilities()
> 
> v3:
>  * use arm64 errata framework for midr check
> 
> v2:
>  * adding MIDR check
> 
> Signed-off-by: Robert Richter <rrichter at cavium.com>

Reviewed-by: Marc Zyngier <marc.zyngier at arm.com>

	M.
-- 
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