From patchwork Sun Jul 2 04:38:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Michael Tokarev X-Patchwork-Id: 1802284 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4QtxFp4NjHz20Pg for ; Sun, 2 Jul 2023 14:41:02 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qFos0-0007ri-BB; Sun, 02 Jul 2023 00:39:32 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qFory-0007qy-9H; Sun, 02 Jul 2023 00:39:30 -0400 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qForw-0002UK-Bj; Sun, 02 Jul 2023 00:39:30 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 4647510D1D; Sun, 2 Jul 2023 07:39:09 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id 8851B110AC; Sun, 2 Jul 2023 07:39:08 +0300 (MSK) Received: (nullmailer pid 2090175 invoked by uid 1000); Sun, 02 Jul 2023 04:39:07 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org, qemu-stable@nongnu.org Cc: Shameer Kolothum , Longpeng , =?utf-8?q?C=C3=A9dric_Le_Goater?= , Michael Tokarev Subject: [Stable-7.2.4 49/49] vfio/pci: Call vfio_prepare_kvm_msi_virq_batch() in MSI retry path Date: Sun, 2 Jul 2023 07:38:49 +0300 Message-Id: <20230702043850.2090131-6-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Shameer Kolothum When vfio_enable_vectors() returns with less than requested nr_vectors we retry with what kernel reported back. But the retry path doesn't call vfio_prepare_kvm_msi_virq_batch() and this results in, qemu-system-aarch64: vfio: Error: Failed to enable 4 MSI vectors, retry with 1 qemu-system-aarch64: ../hw/vfio/pci.c:602: vfio_commit_kvm_msi_virq_batch: Assertion `vdev->defer_kvm_irq_routing' failed Fixes: dc580d51f7dd ("vfio: defer to commit kvm irq routing when enable msi/msix") Reviewed-by: Longpeng Signed-off-by: Shameer Kolothum Reviewed-by: Cédric Le Goater Signed-off-by: Cédric Le Goater (cherry picked from commit c17408892319712c12357e5d1c6b305499c58c2a) Signed-off-by: Michael Tokarev diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 63eda94af7..92a45de4c3 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -663,6 +663,8 @@ static void vfio_msi_enable(VFIOPCIDevice *vdev) vfio_disable_interrupts(vdev); + vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev); +retry: /* * Setting vector notifiers needs to enable route for each vector. * Deferring to commit the KVM routes once rather than per vector @@ -670,8 +672,6 @@ static void vfio_msi_enable(VFIOPCIDevice *vdev) */ vfio_prepare_kvm_msi_virq_batch(vdev); - vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev); -retry: vdev->msi_vectors = g_new0(VFIOMSIVector, vdev->nr_vectors); for (i = 0; i < vdev->nr_vectors; i++) {