From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E84D1C7EE30 for ; Thu, 26 Jun 2025 21:53:30 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4bSsrT1v5Dz2xYl; Fri, 27 Jun 2025 07:53:29 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1750949867; cv=none; b=ddWjAyoczL7FMEdYsAC5sA3c0BTIE6OUfOo6Ht103+vnX3h8qCbO+P91Ff5ctWhzJyjzCsw7A1XKnKfyFfxJuGTHfTYFRuXfB5bM68O7uWk3pmkzeOFrI4iRt4RnKf3AT7J4sKiWIQbFNuEo/wSHp31bxhdONaYwx+EXGnp5ZeAwzqf5Bnn4l/QX7IpkkhqULOj7lvrSGzjBr5IidYWHUpeMcboN/SzrJsMAt1RwD2rf28/YW8grA8bRkiiDhLtoup52Z94Pixszb24q1q+px8DM9aMNkOEDlNSZeWhsSXSfX1cmAgII5ib/IbPiSdlnksUNTOiSHtB6Zf5vZXEW0g== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1750949867; c=relaxed/relaxed; bh=K8YPmhgd7GRWdTq4p5rz0ar2G7c+A7AteQJ8okEmiyU=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=OpN3OK1T4nH+7fjzLoVeZud1j3b9ggdJrqaQSpn1AmoLuMrJL5j1IHcEulSbgcYF97IV9/CthL7KhkDvdPGvOD1qJNLgrB3o9rdT1KV2JVbYlCRVdpgVC1eEOiCIddBGBEETelPTEJj1O+DZqmEwPv8aDCl/lsEdxGMwtdXXV/K44culzMunxapazYFuNq1HGpgGUqf7WBovTij4rfgukiMdmVkRm3aejUXEBz4+Itk82VxzA3ZN0e/Usxa4HabQKN8mcGynBttI2qmQECa2jGYk3ciabyxHEf2Bx0Rop2n5OOn0U0z5BkKASL5udqHfrU5RKVbF1siCEKRATkabrw== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; dkim=pass (2048-bit key; secure) header.d=linutronix.de header.i=@linutronix.de header.a=rsa-sha256 header.s=2020 header.b=dkL6SNg1; dkim=pass header.d=linutronix.de header.i=@linutronix.de header.a=ed25519-sha256 header.s=2020e header.b=N7DjUNXQ; dkim-atps=neutral; spf=pass (client-ip=193.142.43.55; helo=galois.linutronix.de; envelope-from=namcao@linutronix.de; receiver=lists.ozlabs.org) smtp.mailfrom=linutronix.de Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=linutronix.de header.i=@linutronix.de header.a=rsa-sha256 header.s=2020 header.b=dkL6SNg1; dkim=pass header.d=linutronix.de header.i=@linutronix.de header.a=ed25519-sha256 header.s=2020e header.b=N7DjUNXQ; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linutronix.de (client-ip=193.142.43.55; helo=galois.linutronix.de; envelope-from=namcao@linutronix.de; receiver=lists.ozlabs.org) Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4bShcp0bc4z30Nl for ; Fri, 27 Jun 2025 00:57:45 +1000 (AEST) From: Nam Cao DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1750949280; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=K8YPmhgd7GRWdTq4p5rz0ar2G7c+A7AteQJ8okEmiyU=; b=dkL6SNg1bPhA+biVVEeT8puaUIOg12+2SWQ7defQnHIGc9BDeWFkd1ctQ0gUNZYvNeApXP WKdDIs2QCoBK41hm/zn/jYT5Vh/jWy8U1ZykAdAolO8k+m2uoPgkAaXngSTm1YfYg9VL4s xKAITZgt8HJDg6q2TgfDS7EgorR3Kwo4z0iVceePevM56nPtvaBhlcsdz/rHvth0L7ZdkE lbHZiKhiM7y6T0d9NmsJ/FVmQYenLVaAs4br1GynVIFVRHhjwLnOaOXbrqcBiUzasF0T56 F5wOZLlxBTirOCSLMJKWgpboqFAeZRPNL+frv5rz2eVmsW136HWHf72DD07kSA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1750949280; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=K8YPmhgd7GRWdTq4p5rz0ar2G7c+A7AteQJ8okEmiyU=; b=N7DjUNXQqh1nFLJCr+LThRh/bbiQX23ScEPQDSYJRD73sjpRqG1FOEFxPcaMl51rLMgJX1 kQa/d6OKtvnYh4Bw== To: Marc Zyngier , Thomas Gleixner , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Cc: Nam Cao Subject: [PATCH 0/3] powerpc: Cleanup and convert to MSI parent domain Date: Thu, 26 Jun 2025 16:47:39 +0200 Message-Id: X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable The initial implementation of PCI/MSI interrupt domains in the hierarchical interrupt domain model used a shortcut by providing a global PCI/MSI domain. This works because the PCI/MSI[X] hardware is standardized and uniform, but it violates the basic design principle of hierarchical interrupt domains: Each hardware block involved in the interrupt delivery chain should have a separate interrupt domain. For PCI/MSI[X], the interrupt controller is per PCI device and not a global made-up entity. Unsurprisingly, the shortcut turned out to have downsides as it does not allow dynamic allocation of interrupt vectors after initialization and it prevents supporting IMS on PCI. For further details, see: https://lore.kernel.org/lkml/20221111120501.026511281@linutronix.de/ The solution is implementing per device MSI domains, this means the entities which provide global PCI/MSI domain so far have to implement MSI parent domain functionality instead. This series: - Untangle XIVE driver from Powernv and Pseries drivers - Convert the Powernv and Pseries drivers to implement MSI parent domain functionality Nam Cao (3): powerpc/xive: Untangle xive from child interrupt controller drivers powerpc/powernv/pci: Switch to use msi_create_parent_irq_domain() powerpc/pseries/msi: Switch to msi_create_parent_irq_domain() arch/powerpc/include/asm/pci-bridge.h | 2 - arch/powerpc/include/asm/xive.h | 1 - arch/powerpc/platforms/powernv/Kconfig | 1 + arch/powerpc/platforms/powernv/pci-ioda.c | 96 ++++++----------- arch/powerpc/platforms/pseries/Kconfig | 1 + arch/powerpc/platforms/pseries/msi.c | 124 ++++++++-------------- arch/powerpc/sysdev/xive/common.c | 63 ++++++----- 7 files changed, 113 insertions(+), 175 deletions(-) --=20 2.39.5