[RFC PATCH] irqchip/gic-v3-its: Allocate ITS tables from corresponding node memory

[rric.net@gmail.com (Robert Richter)]

On 29.04.16 05:18:42, Ashok Kumar wrote:
> In the case of systems having multi socket and multi ITS, allocating
> local node memory for ITS device table, collection table, interrupt
> translation table and command queue will help in reducing inter-chip
> traffic even though they(except command queue) could be cached in the GIC.
> 
> Signed-off-by: Ashok Kumar <ashoks@broadcom.com>
> ---
> This patch is created on top of Cavium thunderx erratum 23144 patch [1].
> 
> I am not sure how to do this for ACPI as GIC ITS ID in MADT doesn't map to
> _PXM. Am I missing something here? Any thoughts?

For ACPI we enable the #23144 workaround differently. In that case we
determine the node using MPIDR_AFFINITY_LEVEL() for this. I am going
to send a patch for this soon (but this is ThunderX specific and only
works for the errata handler).

-Robert

> [1] https://lkml.org/lkml/2016/4/15/830 - [PATCH v5] irqchip, gicv3-its, \
> numa: Enable workaround for Cavium thunderx erratum 23144