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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7AD56CAC58E for ; Thu, 11 Sep 2025 11:34:24 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D611E94000A; Thu, 11 Sep 2025 07:34:23 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D1198940008; Thu, 11 Sep 2025 07:34:23 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BB1ED94000A; Thu, 11 Sep 2025 07:34:23 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id A70D8940008 for ; Thu, 11 Sep 2025 07:34:23 -0400 (EDT) Received: from smtpin22.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 69FE5B98DE for ; Thu, 11 Sep 2025 11:34:23 +0000 (UTC) X-FDA: 83876761206.22.BC3384C Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf30.hostedemail.com (Postfix) with ESMTP id B19388000B for ; Thu, 11 Sep 2025 11:34:21 +0000 (UTC) Authentication-Results: imf30.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=FcCIpgx1; spf=pass (imf30.hostedemail.com: domain of leon@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=leon@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1757590461; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=NsF5GOob/YSyhfaLR09/3AbntwoC/IeWxTkKcL2tHo8=; b=HewsQ6U4rkbLr296pVHVNGNHMvHUyk70Tmp9+qhRKIjpLtP7IXy1oLgiNWxJAo93pvjAg6 u1VmI24DMCupFwPSQF0hVqFyqNXCRrd7oHzNxz6kdfWrlVqb3MkVkvncraiewt6rgarwCM /Cwq32xx5HqZjYqymZu7sNgDKvtxbNc= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1757590461; a=rsa-sha256; cv=none; b=wu3ayeG51cLvgUooYkN/td0xMaITinu2qNcmNA1x811b0FF6c7ah84z/8IofrljCn1GpNg vzz4jvJXJZhOjscU5MFA4KTqtKAuZzHX/uyzL2/+wWErSZjS3Z662o3rWr5mbJT8I6Yns8 4iowD8F61oXVE1FQ7O40JHN95Yk4RAk= ARC-Authentication-Results: i=1; imf30.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=FcCIpgx1; spf=pass (imf30.hostedemail.com: domain of leon@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=leon@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 9D02A40295; Thu, 11 Sep 2025 11:34:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0FDADC4CEF1; Thu, 11 Sep 2025 11:34:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757590460; bh=XSq9qJYMvX5x9A0SGQeu7EMmnMC35VY7+EoC77mNcp8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FcCIpgx1TGJzgCnTTyX04qdN3KJuBsYXSa7nx1A97dM6JDTKSa7vSOTcrlywPw/RK j6Q2+da3LkTc0JLLFN7RXuuddjf/pO748HsIAGrYtGTaSWwXDUfkuMFkUpEC1GyoUE KAzfYSvAugjo33qgsLYU+olcxZ2CC/wK2vhXE100SDMKeY3fuP4/DIf4p7Sfenvrsf S1zK5DHFSU9rAKdaQmrsguSZa9YX1MSt5vEm3aekow7rKQYhZisWrtcyh2/S3QcXE2 EI/UNKaITwMMvqy4rQTsUooBHxHVPZCCm9NogXe3bIjrzIz42RCjLe9etIoffJodGs sWAeOerEN0Jmg== From: Leon Romanovsky To: Alex Williamson Cc: Vivek Kasireddy , Jason Gunthorpe , Andrew Morton , Bjorn Helgaas , =?UTF-8?q?Christian=20K=C3=B6nig?= , dri-devel@lists.freedesktop.org, iommu@lists.linux.dev, Jens Axboe , Joerg Roedel , kvm@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, Logan Gunthorpe , Marek Szyprowski , Robin Murphy , Sumit Semwal , Will Deacon Subject: [PATCH v2 06/10] vfio: Export vfio device get and put registration helpers Date: Thu, 11 Sep 2025 14:33:10 +0300 Message-ID: <7b1739e21959ccc56c86658ea3516bd0d989ab86.1757589589.git.leon@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: B19388000B X-Stat-Signature: tcru9uzbxhr3i5anmw75xa58f9o6t73x X-Rspam-User: X-HE-Tag: 1757590461-993313 X-HE-Meta: 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 Kjb3fKXK s/zOySA14zaSBKxrOxzFyW82BZVmg34iWDmMIAKztYc7wEpNlO2CciTD9bUpKXjjGLVwLDZ3jtyGQey0/ULosW8NerrslG3nZKLEJ7DdWVbZrOJq7jHavoBCvg7HLUnWuyXTOTxMQ3Vo8yXirr0ESiMYzEg7ZbGspot9XqlNiyfLjMonVpT1UezCDdY9UankNa0QRWFy042WiQnmJgJdFflpjtEzJtpWlvrB1CsiAJqGd3L6s8imQbjlBTssYm7EQlRKUhKsbhB0ICCykxylDzvVfSSdj8LkydoWH X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Vivek Kasireddy These helpers are useful for managing additional references taken on the device from other associated VFIO modules. Original-patch-by: Jason Gunthorpe Signed-off-by: Vivek Kasireddy Signed-off-by: Leon Romanovsky --- drivers/vfio/vfio_main.c | 2 ++ include/linux/vfio.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index 5046cae052224..2f0dcec67ffe3 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -171,11 +171,13 @@ void vfio_device_put_registration(struct vfio_device *device) if (refcount_dec_and_test(&device->refcount)) complete(&device->comp); } +EXPORT_SYMBOL_GPL(vfio_device_put_registration); bool vfio_device_try_get_registration(struct vfio_device *device) { return refcount_inc_not_zero(&device->refcount); } +EXPORT_SYMBOL_GPL(vfio_device_try_get_registration); /* * VFIO driver API diff --git a/include/linux/vfio.h b/include/linux/vfio.h index eb563f538dee5..217ba4ef17522 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -297,6 +297,8 @@ static inline void vfio_put_device(struct vfio_device *device) int vfio_register_group_dev(struct vfio_device *device); int vfio_register_emulated_iommu_dev(struct vfio_device *device); void vfio_unregister_group_dev(struct vfio_device *device); +bool vfio_device_try_get_registration(struct vfio_device *device); +void vfio_device_put_registration(struct vfio_device *device); int vfio_assign_device_set(struct vfio_device *device, void *set_id); unsigned int vfio_device_set_open_count(struct vfio_device_set *dev_set); -- 2.51.0