[PATCH Dovetail v2 0/2] Dovetail: Fix for arm64 IRQ pipelining, API for co-kernels

Hi all,

There were two issues detected while doing the forward port to 6.19:

  - The signature of __request_percpu_irq() has been changed in 6.19 and
    7.0 will remove the function entirely. We need a replacement for
    that function as co-kernels (evl, cobalt) relied on it for
    registering the OOB IRQs. All existing alternatives are missing the
    flags parameter that we require.

    Patch 1 is trying to address that by introducing a dovetail specific
    helper.

    The implementation has to be adjusted a bit during the forward
    porting to 7.0, but the API can stay the same.

  - While reviewing the pipeline entry code for arm64 - triggered by a
    patch review - I noticed that the checks for the demotion case are
    confusing on arm64.

Patch 1 qualifies for backporting. It allows co-kernels to migrate to 
the new API without any need for Linux / Dovetail version checks.

To: Xenomai <[email protected]>
Cc: Philippe Gerum <[email protected]>
Cc: Jan Kiszka <[email protected]>

Signed-off-by: Florian Bezdeka <[email protected]>
---
Changes in v2:
- Updated wording / backport candidates in cover letter
- Rework patch 2 after review from Philippe 
- Link to v1: https://lore.kernel.org/r/20260216-wip-flo-v6-19-dovetail-rebase-v1-0-5c36863cba17@siemens.com

---
Florian Bezdeka (2):
      dovetail: genirq: Add request_percpu_irq_affinity_flags()
      arm64: irq_pipeline: Cleanup demotion check for el1

 arch/arm64/kernel/entry-common.c |  4 ----
 include/linux/interrupt.h        |  5 +++++
 kernel/irq/manage.c              | 10 ++++++++++
 3 files changed, 15 insertions(+), 4 deletions(-)
---
base-commit: 61ac9499b2a582aad9e190db04bb48747e7f5821
change-id: 20260216-wip-flo-v6-19-dovetail-rebase-cdb12bee0c98

Best regards,
-- 
Florian Bezdeka <[email protected]>