From nobody Thu Sep 11 20:29:46 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3716C77B6D for ; Wed, 22 Mar 2023 20:15:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232080AbjCVUPm (ORCPT ); Wed, 22 Mar 2023 16:15:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232286AbjCVUOx (ORCPT ); Wed, 22 Mar 2023 16:14:53 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 708CE85B24; Wed, 22 Mar 2023 13:05:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679515549; x=1711051549; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=VVMjsQ1HxJ3krLgi1Lg7Cpv+oN6wKxL1Z/KsE9PULTQ=; b=NrL41IxPFlwvk9O70uufgZh+DZp1hSImXjwVNA+pE2eeqdzwCPfSXluV mDvYSpjHPVIWIYgB2yEAyOoAp/kld92OuBsJ7F+p6EcB7i0Ay3/X1P2Xk ifwteClaMsg5CeNBIVazg6iE5Zt9beQWqfyf00LQv9ox5XLFWNVCrDLqM +Rakopem/j8QqfaayTa5F6wYOH06mW8aCaQm349aDNBvZl7p1WfRfG+Pi Y+2oh/VPvomZ9rYjN63pZvtxBTmbEqPubiiU23uIDCpvptvMR1oxKAzp6 M2kNGBWWOVmZsEvjjc+j+fMVl2SSiby460MkJ8CJSA7Gais3JMubzGRLM g==; X-IronPort-AV: E=McAfee;i="6600,9927,10657"; a="339356825" X-IronPort-AV: E=Sophos;i="5.98,282,1673942400"; d="scan'208";a="339356825" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Mar 2023 13:04:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10657"; a="682039332" X-IronPort-AV: E=Sophos;i="5.98,282,1673942400"; d="scan'208";a="682039332" Received: from srinivas-otcpl-7600.jf.intel.com (HELO jacob-builder.jf.intel.com) ([10.54.39.106]) by orsmga002.jf.intel.com with ESMTP; 22 Mar 2023 13:04:05 -0700 From: Jacob Pan To: LKML , iommu@lists.linux.dev, Jason Gunthorpe , "Lu Baolu" , Joerg Roedel , Jean-Philippe Brucker , "Robin Murphy" , Dave Hansen , Thomas Gleixner , X86 Kernel , bp@alien8.de, "H. Peter Anvin" , Peter Zijlstra , corbet@lwn.net, vkoul@kernel.org, dmaengine@vger.kernel.org, linux-doc@vger.kernel.org Cc: "Will Deacon" , David Woodhouse , Raj Ashok , "Tian, Kevin" , Yi Liu , "Yu, Fenghua" , Dave Jiang , Kirill Shutemov , Tony Luck , Jacob Pan Subject: [PATCH v8 3/7] iommu/sva: Remove PASID to mm lookup function Date: Wed, 22 Mar 2023 13:07:59 -0700 Message-Id: <20230322200803.869130-4-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230322200803.869130-1-jacob.jun.pan@linux.intel.com> References: <20230322200803.869130-1-jacob.jun.pan@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" There is no user of iommu_sva_find() function, remove it so that PASID allocator can be a simple IDA. Device drivers are expected to store and keep track of their own PASID metadata. Reviewed-by: Lu Baolu Signed-off-by: Jason Gunthorpe Signed-off-by: Jacob Pan Reviewed-by: Kevin Tian --- drivers/iommu/iommu-sva.c | 20 -------------------- drivers/iommu/iommu-sva.h | 1 - 2 files changed, 21 deletions(-) diff --git a/drivers/iommu/iommu-sva.c b/drivers/iommu/iommu-sva.c index fcfdc80a3939..4f357ef14f04 100644 --- a/drivers/iommu/iommu-sva.c +++ b/drivers/iommu/iommu-sva.c @@ -51,26 +51,6 @@ int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t= min, ioasid_t max) } EXPORT_SYMBOL_GPL(iommu_sva_alloc_pasid); =20 -/* ioasid_find getter() requires a void * argument */ -static bool __mmget_not_zero(void *mm) -{ - return mmget_not_zero(mm); -} - -/** - * iommu_sva_find() - Find mm associated to the given PASID - * @pasid: Process Address Space ID assigned to the mm - * - * On success a reference to the mm is taken, and must be released with mm= put(). - * - * Returns the mm corresponding to this PASID, or an error if not found. - */ -struct mm_struct *iommu_sva_find(ioasid_t pasid) -{ - return ioasid_find(&iommu_sva_pasid, pasid, __mmget_not_zero); -} -EXPORT_SYMBOL_GPL(iommu_sva_find); - /** * iommu_sva_bind_device() - Bind a process address space to a device * @dev: the device diff --git a/drivers/iommu/iommu-sva.h b/drivers/iommu/iommu-sva.h index 7215a761b962..102eae1817a2 100644 --- a/drivers/iommu/iommu-sva.h +++ b/drivers/iommu/iommu-sva.h @@ -9,7 +9,6 @@ #include =20 int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max= ); -struct mm_struct *iommu_sva_find(ioasid_t pasid); =20 /* I/O Page fault */ struct device; --=20 2.25.1