From patchwork Thu Aug 25 07:47:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinhao Fan X-Patchwork-Id: 1670099 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 4MCwBD3Y5bz1ygc for ; Thu, 25 Aug 2022 17:50:43 +1000 (AEST) Received: from localhost ([::1]:44712 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oR7dP-0007dp-In for incoming@patchwork.ozlabs.org; Thu, 25 Aug 2022 03:50:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43894) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oR7b5-0006zZ-FJ for qemu-devel@nongnu.org; Thu, 25 Aug 2022 03:48:16 -0400 Received: from smtp84.cstnet.cn ([159.226.251.84]:57404 helo=cstnet.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oR7b2-0001Bb-TI for qemu-devel@nongnu.org; Thu, 25 Aug 2022 03:48:15 -0400 Received: from localhost.localdomain (unknown [159.226.43.62]) by APP-05 (Coremail) with SMTP id zQCowAAX+ookKQdjLzYIAA--.1273S2; Thu, 25 Aug 2022 15:47:53 +0800 (CST) From: Jinhao Fan To: qemu-devel@nongnu.org Cc: its@irrelevant.dk, kbusch@kernel.org, stefanha@gmail.com, Jinhao Fan Subject: [PATCH v2 0/3] hw/nvme: add irqfd support Date: Thu, 25 Aug 2022 15:47:43 +0800 Message-Id: <20220825074746.2047420-1-fanjinhao21s@ict.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: zQCowAAX+ookKQdjLzYIAA--.1273S2 X-Coremail-Antispam: 1UD129KBjvdXoW7XF4xJFyxZw45GF4DZFyrZwb_yoWkArgE9F 40y3s5ua18Xanaya4qvF1jyryUKayrGr1jy3WqvFy2qr40vFZ8Wr4ktr1UZ3W8XFW5Xrn8 XF4DJFyfury2gjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbc8FF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s 0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26r1Y6r17McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr 1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkIecxEwVAFwVW8CwCF 04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r 18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vI r41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr 1lIxAIcVCF04k26cxKx2IYs7xG6rW3Jr0E3s1lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAI cVC2z280aVCY1x0267AKxVWUJVW8JbIYCTnIWIevJa73UjIFyTuYvjfU0SoGDUUUU X-Originating-IP: [159.226.43.62] X-CM-SenderInfo: xidqyxpqkd0j0rv6xunwoduhdfq/ Received-SPF: pass client-ip=159.226.251.84; envelope-from=fanjinhao21s@ict.ac.cn; helo=cstnet.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-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" This patch series changes qemu-nvme's interrupt emulation to use event notifiers, which can ensure thread-safe interrupt delivery when iothread is used. In the first patche, I convert qemu-nvme's IO emulation logic to send irq via eventfd, so that the actual assertion and deassertion is always done in the main loop thread with BQL held. In the second patch, support is added to send irq via KVM irqfd, bypassing qemu's MSI-x emulation. In the last patch, I add MSI-x mask handlers when irqfd is enabled so that qemu-nvme knows which vector is masked even when qemu's MSI-x emulation is bypassed. Changes since v1: - Made nvme_irq_(de)assert wrappers around eventfd call and actual irq assertion - Dropped the previous first patch to avoid duplicate checks for irq_enabled and msix_enabled Jinhao Fan (3): hw/nvme: support irq(de)assertion with eventfd hw/nvme: use KVM irqfd when available hw/nvme: add MSI-x mask handlers for irqfd hw/nvme/ctrl.c | 264 ++++++++++++++++++++++++++++++++++++++++--- hw/nvme/nvme.h | 7 ++ hw/nvme/trace-events | 3 + 3 files changed, 257 insertions(+), 17 deletions(-)