From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 34364289E2D; Thu, 26 Jun 2025 14:48:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750949319; cv=none; b=ZRO/i497b0OQw8Yqyv8Sqi7yfmEfuscA+YcIO2wedEFaRTfDgebJ8S3FEm0GUybhgG2KPmLst1XP2Az06zJwph3u04HG8+dna7lQMoaTxcZG2fDYlDFSxWYaAXY56DUlHXbgjv8cpkrVTIJTbfjDyZ+MA7Zjk/U3adWmhE5NUNU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750949319; c=relaxed/simple; bh=Q6UqfwCyC3mZxxR1Ap+fUonqEOHiafoq86ph9bdqlzY=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=dSJjbzpEVvMMQPx9mrn3v9ZIm3SAH+yNLCEGeGiRoiRTorCjw981Fd3kgjbrtYyQ0UFu6T2U+1r2MGkijLWH/6LRrdXbgAg/5aVWclg1Nhh4Hrk3vZegtXUO4QGo8Uyca88JlfKMNEpAsZT2MaPSc31KSY41Vn6nPmg5tRrynIw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=gaz8seox; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=2Fd2QlwC; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="gaz8seox"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="2Fd2QlwC" 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: Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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