From patchwork Mon Nov 12 06:45:00 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baolu Lu X-Patchwork-Id: 10678201 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 010B615A6 for ; Mon, 12 Nov 2018 06:48:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E3C6C29D8B for ; Mon, 12 Nov 2018 06:48:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D64B629DBE; Mon, 12 Nov 2018 06:48:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 67A2429D8B for ; Mon, 12 Nov 2018 06:48:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732035AbeKLQkB (ORCPT ); Mon, 12 Nov 2018 11:40:01 -0500 Received: from mga17.intel.com ([192.55.52.151]:53355 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731284AbeKLQkA (ORCPT ); Mon, 12 Nov 2018 11:40:00 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Nov 2018 22:48:07 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,494,1534834800"; d="scan'208";a="88579707" Received: from allen-box.sh.intel.com ([10.239.161.122]) by orsmga007.jf.intel.com with ESMTP; 11 Nov 2018 22:48:04 -0800 From: Lu Baolu To: Joerg Roedel , David Woodhouse , Alex Williamson , Kirti Wankhede Cc: ashok.raj@intel.com, sanjay.k.kumar@intel.com, jacob.jun.pan@intel.com, kevin.tian@intel.com, Jean-Philippe Brucker , yi.l.liu@intel.com, yi.y.sun@intel.com, peterx@redhat.com, tiwei.bie@intel.com, Zeng Xin , iommu@lists.linux-foundation.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Lu Baolu , Jacob Pan Subject: [RFC PATCH 4/5] iommu/vt-d: Allocate and free a pasid Date: Mon, 12 Nov 2018 14:45:00 +0800 Message-Id: <20181112064501.2290-5-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181112064501.2290-1-baolu.lu@linux.intel.com> References: <20181112064501.2290-1-baolu.lu@linux.intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This adds the Intel vt-d specific ops to allocate and free a pasid value. Cc: Ashok Raj Cc: Jacob Pan Cc: Kevin Tian Signed-off-by: Liu Yi L Signed-off-by: Lu Baolu --- drivers/iommu/intel-iommu.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 769b7059d52f..8dbd0c601dab 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5626,6 +5626,37 @@ static int intel_iommu_pasid_init(struct iommu_pasid *pasid) return 0; } +static int intel_iommu_pasid_alloc(struct iommu_pasid *pasid, ioasid_t start, + ioasid_t end, ioasid_t *ioasid) +{ + struct intel_iommu *iommu; + + iommu = pasid->priv; + if (!iommu) + return -EINVAL; + + /* + * In caching mode, PASID ID should be allocated and freed + * through the virtual command registers. Otherwise, rely + * on the iommu global idr. + */ + if (!cap_caching_mode(iommu->cap)) + return -EAGAIN; + + return vcmd_alloc_pasid(iommu, ioasid); +} + +static void intel_iommu_pasid_free(struct iommu_pasid *pasid, ioasid_t ioasid) +{ + struct intel_iommu *iommu; + + iommu = pasid->priv; + if (!iommu || !cap_caching_mode(iommu->cap)) + return; + + vcmd_free_pasid(iommu, ioasid); +} + const struct iommu_ops intel_iommu_ops = { .capable = intel_iommu_capable, .domain_alloc = intel_iommu_domain_alloc, @@ -5646,6 +5677,8 @@ const struct iommu_ops intel_iommu_ops = { .get_dev_attr = intel_iommu_get_dev_attr, .set_dev_attr = intel_iommu_set_dev_attr, .pasid_init = intel_iommu_pasid_init, + .pasid_alloc = intel_iommu_pasid_alloc, + .pasid_free = intel_iommu_pasid_free, .pgsize_bitmap = INTEL_IOMMU_PGSIZES, };