Re: [PATCH v2 00/10] irqdomain, gic-v3-its: Implement late irq domain initialization

Richter, Robert
2018-12-05T12:50:34Z

Marc,

do you have any comments on this series? Please take a look at it.

There is also this one on top:

https://patchwork.kernel.org/cover/10685025/

Both series fix ITS table allocation for 4k page size and make the
upstream kernel working without the need of additional patches.

Thanks,

-Robert

On 28.11.18 15:43:02, Richter, Robert wrote:
> This patch series is a rework of the gic-v3-its initialization. It is
> in preparation of a further series that uses CMA memory allocation for
> ITS tables. For this the CMA framework must be available and thus ITS
> needs to be initialized after the arch_initcalls. This requires two
> major reworks.
>
> First we must remove all irq domain init order dependencies (patches
> #1-#5), second the ITS initialization must be split into an early
> probe and a later init part (patches #6-#10).
>
> Patch #1 introduces a new interface to request an irq domain, see the
> patch description for details. In patches #2-#5 all ITS related irq
> domains are converted to use the new interface. There are no order
> dependencies for parent and client irq domain initialization anymore
> which allows us to initialize all ITS irq domains in the same initcall
> (moving to the later subsys_initcall). Note that I do not have fsl
> hardware available, the code should work, but is only carefully
> reviewed and compile tested, please test on that hardware.
>
> The remaining patches #6-#10 are an incremental rework of the ITS
> initialization, basically splitting probe and init (patch #7) and
> separating it from gic-v3 code (patch #8). Patches #9 and #10 change
> initcall levels for various drivers.
>
> Patches have been tested with Cavium ThunderX and ThunderX2. I have an
> implementation of CMA ITS table allocation on top of this series
> available, I will send out patches for this in a couple of days.
>
> v2:
> * fix check for domain match in irq_domain_handle_requests()
> * add comment that describes this check in irq_domain_handle_
> requests()
>
> Robert Richter (10):
> irqdomain: Add interface to request an irq domain
> irqchip/gic-v3-its-platform-msi: Remove domain init order dependencies
> irqchip/irq-gic-v3-its-pci-msi: Remove domain init order dependencies
> irqchip/irq-gic-v3-its-fsl-mc-msi: Remove domain init order
> dependencies
> fsl-mc/dprc-driver: Remove domain init order dependencies
> irqchip/gic-v3-its: Initialize its nodes in probe order
> irqchip/gic-v3-its: Split probing from its node initialization
> irqchip/gic-v3-its: Decouple its initialization from gic
> irqchip/gic-v3-its: Initialize its nodes later
> irqchip/gic-v3-its: Initialize MSIs with subsys_initcalls
>
> drivers/bus/fsl-mc/dprc-driver.c | 41 +++++++
> drivers/bus/fsl-mc/fsl-mc-msi.c | 6 +-
> drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 49 +++++---
> drivers/irqchip/irq-gic-v3-its-pci-msi.c | 68 ++++++-----
> drivers/irqchip/irq-gic-v3-its-platform-msi.c | 56 +++++++--
> drivers/irqchip/irq-gic-v3-its.c | 160 ++++++++++++++++---------
> drivers/irqchip/irq-gic-v3.c | 12 +-
> include/linux/cpuhotplug.h | 1 +
> include/linux/irqchip/arm-gic-v3.h | 5 +-
> include/linux/irqdomain.h | 15 +++
> kernel/irq/irqdomain.c | 163 ++++++++++++++++++++++++++
> 11 files changed, 446 insertions(+), 130 deletions(-)
>
> --
> 2.11.0
>

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