From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 8850825B1F0; Mon, 9 Jun 2025 13:48:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749476905; cv=none; b=f0mBXNnP/2B3ktjCBnhcp1oG4hoA71ob+qzqEv2fVyNPSmwqGpEqrn9dcIuYuFHqJQJr5r6CRRHMCDJQ+rN1St7WuaB448pHBgvg5RrEKXDgDZAo5uzTOYzY8ojAM0EC7hd8AX60tYIWIW4oVgjrLLNEb8SlwSsYLsQKqVrgLLM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749476905; c=relaxed/simple; bh=BPlwmMomgPvNeJIPYqQeejjwBJJNHh+k3OD1Bfrq4HE=; h=From:To:Cc:Subject:Date:Message-Id; b=ucycg4/mJFU7uUY4ebLWjA3IK5Je+5JjItqLAcOF7GNP86WqiK0QkRp8CQFTRnmiua347Z+ExDLP2D9+uk/Km2AVH1bHUIq2/z3KZfxxDCgMB7G+CRMvjh5RDW0q5KYAIh5W17OMKSjMj/RdcuL6C0wS6j4w3nx3CKzdxRsYoH8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=B7wLA6vs; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="B7wLA6vs" Received: by linux.microsoft.com (Postfix, from userid 1134) id 04AE12117470; Mon, 9 Jun 2025 06:48:23 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 04AE12117470 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1749476903; bh=j31y8dX5VzTCMYV6bDl/i9BeZDJRVIOFcCu+6HPbEq4=; h=From:To:Cc:Subject:Date:From; b=B7wLA6vsg1C++tmBXd1Y1ci1y2eSLPmGnImcvGqACPvF+AxvNGe2zLHA/4gDfB1Ir 3dQJTUpa6GZOQgjAa6EN0Tk3dr+u4gZsG2dVLm78teXs+BdFoXlKfveL1rfxO8+18B Rh24IrBup+Myi4ZvkL/sjp8c1oiP+5HOYKQRbvlo= From: Shradha Gupta To: Cc: Shradha Gupta , linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Nipun Gupta , Yury Norov , Jason Gunthorpe , Jonathan Cameron , Anna-Maria Behnsen , Kevin Tian , Long Li , Thomas Gleixner , Bjorn Helgaas , Rob Herring , Manivannan Sadhasivam , =?UTF-8?q?Krzysztof=20Wilczy=EF=BF=BD=7EDski?= , Lorenzo Pieralisi , Dexuan Cui , Wei Liu , Haiyang Zhang , "K. Y. Srinivasan" , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Konstantin Taranov , Simon Horman , Leon Romanovsky , Maxim Levitsky , Erni Sri Satya Vennela , Peter Zijlstra , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, Paul Rosswurm , Shradha Gupta Subject: [PATCH v5 0/5] Allow dyn MSI-X vector allocation of MANA Date: Mon, 9 Jun 2025 06:48:21 -0700 Message-Id: <1749476901-27251-1-git-send-email-shradhagupta@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: In this patchset we want to enable the MANA driver to be able to allocate MSI-X vectors in PCI dynamically. The first patch exports pci_msix_prepare_desc() in PCI to be able to correctly prepare descriptors for dynamically added MSI-X vectors. The second patch adds the support of dynamic vector allocation in pci-hyperv PCI controller by enabling the MSI_FLAG_PCI_MSIX_ALLOC_DYN flag and using the pci_msix_prepare_desc() exported in first patch. The third patch adds a detailed description of the irq_setup(), to help understand the function design better. The fourth patch is a preparation patch for mana changes to support dynamic IRQ allocation. It contains changes in irq_setup() to allow skipping first sibling CPU sets, in case certain IRQs are already affinitized to them. The fifth patch has the changes in MANA driver to be able to allocate MSI-X vectors dynamically. If the support does not exist it defaults to older behavior. Since this patchset has patches from PCI and net tree, I am not entirely sure what should be the target tree. Any suggestions/recommendations on the same are welcomed. --- Changes in v5 * Added Yury as Author of the 3rd patch * Fixed base commit information in the cover letter * Correctly initialized start_irqs, so that it is cleaned properly * rearranged the cpu_lock to minimize the critical section --- Change in v4 * add a patch describing the functionality of irq_setup() through a comment * In irq_setup(), avoid using a label next_cpumask: * modify the changes in MANA patch about restructuring the error handling path in mana_gd_setup_dyn_irqs() * modify the mana_gd_setup_irqs() to simplify handling around start_irq_index * add warning if an invalid gic is returned * place the xa_destroy() cleanup in mana_gd_remove --- Changes in v3 * split the 3rd patch into preparation patch around irq_setup() and changes in mana driver to allow dynamic IRQ allocation * Add arm64 support for dynamic MSI-X allocation in pci_hyperv controller --- Changes in v2 * split the first patch into two(exporting the preapre_desc func and using the function and flag in pci-hyperv) * replace 'pci vectors' by 'MSI-X vectors' * Change the cover letter description to align with changes made --- Shradha Gupta (5): PCI/MSI: Export pci_msix_prepare_desc() for dynamic MSI-X allocations PCI: hv: Allow dynamic MSI-X vector allocation net: mana: explain irq_setup() algorithm net: mana: Allow irq_setup() to skip cpus for affinity net: mana: Allocate MSI-X vectors dynamically .../net/ethernet/microsoft/mana/gdma_main.c | 363 ++++++++++++++---- drivers/pci/controller/pci-hyperv.c | 3 +- drivers/pci/msi/irqdomain.c | 5 +- include/linux/msi.h | 2 + include/net/mana/gdma.h | 8 +- 5 files changed, 295 insertions(+), 86 deletions(-) base-commit: 2c7e4a2663a1ab5a740c59c31991579b6b865a26 -- 2.34.1