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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 6F6E2C7EE30 for ; Thu, 26 Jun 2025 14:51:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=rjC7u1O4n6Y4m8ek4mHKb90DC8/HUd+eWzj/alvKcAs=; b=grP2IGTEWb5EdToIvmhVU1JN8f LYExPcJ074BUL8iNmS2ayfwDjJ+KYwUguX8p1mgmZ3zPwqjNqcV0/iML+ji/nkuqDzPROFFlWd1Ms 37FbCUVlGSR/TeP6+QQGG00PPBX6BCGB/uk+Ej9IWM4BS49auzC+CN2z1vBqFZvOkDORjv1zaFs/D nS/MA6nZ0HnaWNurni1u92WuWWFbDKVR3tBdVAurKb0xme+nChqj4hu4mOgHsjYi28eQrgb8EK0Uu vJFiLLKVdwxIyU+qjhvpb6DXlJ6whYIBf/yL9OoN5gBr/d2vhBQ9FCOEUzUuEWNHtPMcYsVWzZm6l 1Hamq2jw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uUnwX-0000000C0HA-1GcT; Thu, 26 Jun 2025 14:51:13 +0000 Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uUnu0-0000000BzTU-2tML; Thu, 26 Jun 2025 14:48:38 +0000 From: Nam Cao DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1750949315; 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=rjC7u1O4n6Y4m8ek4mHKb90DC8/HUd+eWzj/alvKcAs=; b=gaz8seoxSEVBxG9MHSd/AdwK73Yt7mu+jsV0LollTAaxssib7A4849xAQcipwOrC0G9Uo6 tfcpM3NA0RSjqxu0umLrggdwkuZprE9ZwTlt2NmwRBzYiIZCm08nVH+UnkZ0EnbA6P62GY EMXRpjYh17PCc/lq+dgoXu5/F1jNr1dlYdgHPUeTsmGcnf9w4zD+DE7HpX4cEjGptshy/p w4PI4JWiylFe9B7TBc5EvKJT8Mtcd9gghG+JfYB2lLP/7I3Z8AFNN3FHXBd1vOClFpd9Jf R/pJjIJu3RZtZRM+rgdUOc/gAlcAwUivOqN82fssj7UtXrwKa2IhcAQj3EH/0A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1750949315; 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=rjC7u1O4n6Y4m8ek4mHKb90DC8/HUd+eWzj/alvKcAs=; b=2Fd2QlwCInXViIVIZOCcuzIq4mcR7BYBUaVg4a+xf1NiSgmL30ly5tfX4sxMHPRjXMMy7w sdMGjflSZJvHVtAQ== To: Marc Zyngier , Thomas Gleixner , Lorenzo Pieralisi , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Karthikeyan Mitran , Hou Zhiqiang , Thomas Petazzoni , =?UTF-8?q?Pali=20Roh=C3=A1r?= , "K . Y . Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Joyce Ooi , Jim Quinlan , Nicolas Saenz Julienne , Florian Fainelli , Broadcom internal kernel review list , Ray Jui , Scott Branden , Ryder Lee , Jianjun Wang , Marek Vasut , Yoshihiro Shimoda , Michal Simek , Daire McNamara , Nirmal Patel , Jonathan Derrick , Matthias Brugger , AngeloGioacchino Del Regno , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-renesas-soc@vger.kernel.org Cc: Nam Cao Subject: [PATCH 00/16] PCI: MSI parent domain conversion Date: Thu, 26 Jun 2025 16:47:50 +0200 Message-Id: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250626_074836_867868_C80E4DBB X-CRM114-Status: UNSURE ( 7.54 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 converts the PCI controller drivers to implement MSI parent domain. drivers/pci/Kconfig | 1 + drivers/pci/controller/Kconfig | 11 + drivers/pci/controller/dwc/Kconfig | 1 + .../pci/controller/dwc/pcie-designware-host.c | 68 ++---- drivers/pci/controller/dwc/pcie-designware.h | 1 - drivers/pci/controller/mobiveil/Kconfig | 1 + .../controller/mobiveil/pcie-mobiveil-host.c | 42 ++-- .../pci/controller/mobiveil/pcie-mobiveil.h | 1 - drivers/pci/controller/pci-aardvark.c | 59 ++--- drivers/pci/controller/pci-hyperv.c | 98 ++++++-- drivers/pci/controller/pcie-altera-msi.c | 44 ++-- drivers/pci/controller/pcie-brcmstb.c | 44 ++-- drivers/pci/controller/pcie-iproc-msi.c | 45 ++-- drivers/pci/controller/pcie-mediatek-gen3.c | 67 ++--- drivers/pci/controller/pcie-mediatek.c | 46 ++-- drivers/pci/controller/pcie-rcar-host.c | 69 ++---- drivers/pci/controller/pcie-xilinx-dma-pl.c | 48 ++-- drivers/pci/controller/pcie-xilinx-nwl.c | 45 ++-- drivers/pci/controller/pcie-xilinx.c | 55 +++-- drivers/pci/controller/plda/Kconfig | 1 + drivers/pci/controller/plda/pcie-plda-host.c | 44 ++-- drivers/pci/controller/plda/pcie-plda.h | 1 - drivers/pci/controller/vmd.c | 229 +++++++++--------- 23 files changed, 504 insertions(+), 517 deletions(-) --=20 2.39.5