Re: [PATCH 0/4 V3] irqchip: gic: Introduce ARM GICv2m MSI(-X) support

From: Suravee Suthikulanit
Date: Mon Jul 14 2014 - 12:00:42 EST

On 7/13/2014 6:14 PM, Jason Cooper wrote:

On Wed, Jul 09, 2014 at 06:05:00PM -0500, suravee.suthikulpanit@xxxxxxx wrote:
From: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>

This patch set introduces support for MSI(-X) in GICv2m specification,
which is implemented in some variation of GIC400.

This depends on and has been tested with the V7 of"Add support for PCI in AArch64"

Grrr. I mis-spoke against your v1 of this series. There are more
changes to irq-gic.c than I originally thought in this series.

I am not quite sure what your are referring to.

Additionally, we have a lot of other significant changes to that driver
as well this cycle. It would be really helpful if I could take patches
1-3 through irqchip/gic. I can Ack #4 with the Subject change, and the
branch it lands in can depend on irqchip/gic, no problem there.

Patch 1-3 should be able to go through the irqchip/gic along with the gicv3 from Marc, which I have rebased this patch against.

Patch 4 is arch64 architectural changes. Therefore, it might need to be going through a different branch. Marc/Mark/Will/Catalin, do you have any suggestions on which branch this should go to?

My main concern is your statement above and your answer to my inquiry
against v1.

Right now, I'm only concerned about breaking the build. Can I take 1-3?
Or, do we need to wait until aarch64 PCI lands in mainline?

1 and 2 should be trivial since there is no change functionally.

3 mostly adding new files which should not get built if ARCH64 PCI is not supported based on the arch/arm64/Kconfig below.

+++ b/arch/arm64/Kconfig
@@ -9,6 +9,7 @@ config ARM64
select ARM_AMBA
select ARM_GIC
+ select ARM_GIC_V2M if (PCI && PCI_MSI)
select ARM_GIC_V3

The only thing is the change related to MSI in the irq-gic.c which should not affect with the non-PCI system.



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