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 X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C206AC433E0 for ; Mon, 25 May 2020 22:16:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 96BD5206B6 for ; Mon, 25 May 2020 22:16:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="iylSD0Eh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388842AbgEYWQE (ORCPT ); Mon, 25 May 2020 18:16:04 -0400 Received: from smtp-fw-9102.amazon.com ([207.171.184.29]:56032 "EHLO smtp-fw-9102.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389158AbgEYWQC (ORCPT ); Mon, 25 May 2020 18:16:02 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1590444961; x=1621980961; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=iX5l/Xlb/hmqSAfD83AFiGvvA2sJlt2LYJtnuleKrS0=; b=iylSD0EhuPudmL0Fz7K9PbRzI89KEIteUrbDRpiggeSUnGMp/zy/6Z2D q/QqhDkTizLITgdns7UG2y4w0xKO1g8qnV2LofuMhTogyPtwwWU35ZFii mWYkLZYYA64il1VBOi3TeFW7XWEyQESGW0BDTrXEsjgpGOeRfHxg2kaG/ 4=; IronPort-SDR: O0nkI/HpPH1LcZlNNQd8gVbWZm3S77+HRi3OukSO8zXhTeWvPsjNsBHTcTB2Du1MPhZc7KIXJb 1X0S8qQZL+lQ== X-IronPort-AV: E=Sophos;i="5.73,435,1583193600"; d="scan'208";a="45841815" Received: from sea32-co-svc-lb4-vlan3.sea.corp.amazon.com (HELO email-inbound-relay-1a-16acd5e0.us-east-1.amazon.com) ([10.47.23.38]) by smtp-border-fw-out-9102.sea19.amazon.com with ESMTP; 25 May 2020 22:16:00 +0000 Received: from EX13MTAUEA002.ant.amazon.com (iad55-ws-svc-p15-lb9-vlan2.iad.amazon.com [10.40.159.162]) by email-inbound-relay-1a-16acd5e0.us-east-1.amazon.com (Postfix) with ESMTPS id 96B4AA1DCE; Mon, 25 May 2020 22:15:58 +0000 (UTC) Received: from EX13D16EUB003.ant.amazon.com (10.43.166.99) by EX13MTAUEA002.ant.amazon.com (10.43.61.77) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 25 May 2020 22:15:58 +0000 Received: from 38f9d34ed3b1.ant.amazon.com (10.43.162.50) by EX13D16EUB003.ant.amazon.com (10.43.166.99) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 25 May 2020 22:15:49 +0000 From: Andra Paraschiv To: CC: Anthony Liguori , Benjamin Herrenschmidt , Colm MacCarthaigh , "Bjoern Doebel" , David Woodhouse , "Frank van der Linden" , Alexander Graf , "Martin Pohlack" , Matt Wilson , Paolo Bonzini , Balbir Singh , Stefano Garzarella , Stefan Hajnoczi , Stewart Smith , Uwe Dannowski , , , Andra Paraschiv Subject: [PATCH v3 13/18] nitro_enclaves: Add logic for enclave termination Date: Tue, 26 May 2020 01:13:29 +0300 Message-ID: <20200525221334.62966-14-andraprs@amazon.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20200525221334.62966-1-andraprs@amazon.com> References: <20200525221334.62966-1-andraprs@amazon.com> MIME-Version: 1.0 X-Originating-IP: [10.43.162.50] X-ClientProxiedBy: EX13D06UWA002.ant.amazon.com (10.43.160.143) To EX13D16EUB003.ant.amazon.com (10.43.166.99) Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org An enclave is associated with an fd that is returned after the enclave creation logic is completed. This enclave fd is further used to setup enclave resources. Once the enclave needs to be terminated, the enclave fd is closed. Add logic for enclave termination, that is mapped to the enclave fd release callback. Free the internal enclave info used for bookkeeping. Signed-off-by: Alexandru Vasile Signed-off-by: Andra Paraschiv --- Changelog v2 -> v3 * Remove the WARN_ON calls. * Update static calls sanity checks. * Update kzfree() calls to kfree(). v1 -> v2 * Add log pattern for NE. * Remove the BUG_ON calls. * Update goto labels to match their purpose. * Add early exit in release() if there was a slot alloc error in the fd creation path. --- drivers/virt/nitro_enclaves/ne_misc_dev.c | 168 ++++++++++++++++++++++ 1 file changed, 168 insertions(+) diff --git a/drivers/virt/nitro_enclaves/ne_misc_dev.c b/drivers/virt/nitro_enclaves/ne_misc_dev.c index 2a8e61d6a260..cc0b9927d26f 100644 --- a/drivers/virt/nitro_enclaves/ne_misc_dev.c +++ b/drivers/virt/nitro_enclaves/ne_misc_dev.c @@ -619,9 +619,177 @@ static long ne_enclave_ioctl(struct file *file, unsigned int cmd, return 0; } +/** + * ne_enclave_remove_all_mem_region_entries - Remove all memory region + * entries from the enclave data structure. + * + * This function gets called with the ne_enclave mutex held. + * + * @ne_enclave: private data associated with the current enclave. + */ +static void ne_enclave_remove_all_mem_region_entries( + struct ne_enclave *ne_enclave) +{ + struct ne_mem_region *ne_mem_region = NULL; + struct ne_mem_region *ne_mem_region_tmp = NULL; + + list_for_each_entry_safe(ne_mem_region, ne_mem_region_tmp, + &ne_enclave->mem_regions_list, + mem_region_list_entry) { + list_del(&ne_mem_region->mem_region_list_entry); + + unpin_user_pages(ne_mem_region->pages, + ne_mem_region->nr_pages); + + kfree(ne_mem_region->pages); + + kfree(ne_mem_region); + } +} + +/** + * ne_enclave_remove_all_vcpu_id_entries - Remove all vCPU id entries + * from the enclave data structure. + * + * This function gets called with the ne_enclave mutex held. + * + * @ne_enclave: private data associated with the current enclave. + */ +static void ne_enclave_remove_all_vcpu_id_entries(struct ne_enclave *ne_enclave) +{ + unsigned int cpu = 0; + struct ne_vcpu_id *ne_vcpu_id = NULL; + struct ne_vcpu_id *ne_vcpu_id_tmp = NULL; + + mutex_lock(&ne_cpu_pool.mutex); + + list_for_each_entry_safe(ne_vcpu_id, ne_vcpu_id_tmp, + &ne_enclave->vcpu_ids_list, + vcpu_id_list_entry) { + list_del(&ne_vcpu_id->vcpu_id_list_entry); + + /* Update the available CPU pool. */ + cpumask_set_cpu(ne_vcpu_id->vcpu_id, ne_cpu_pool.avail); + + kfree(ne_vcpu_id); + } + + /* If any siblings left in the enclave CPU pool, move to available. */ + for_each_cpu(cpu, ne_enclave->cpu_siblings) { + cpumask_clear_cpu(cpu, ne_enclave->cpu_siblings); + + cpumask_set_cpu(cpu, ne_cpu_pool.avail); + } + + free_cpumask_var(ne_enclave->cpu_siblings); + + mutex_unlock(&ne_cpu_pool.mutex); +} + +/** + * ne_pci_dev_remove_enclave_entry - Remove enclave entry from the data + * structure that is part of the PCI device private data. + * + * This function gets called with the ne_pci_dev enclave mutex held. + * + * @ne_enclave: private data associated with the current enclave. + * @ne_pci_dev: private data associated with the PCI device. + */ +static void ne_pci_dev_remove_enclave_entry(struct ne_enclave *ne_enclave, + struct ne_pci_dev *ne_pci_dev) +{ + struct ne_enclave *ne_enclave_entry = NULL; + struct ne_enclave *ne_enclave_entry_tmp = NULL; + + list_for_each_entry_safe(ne_enclave_entry, ne_enclave_entry_tmp, + &ne_pci_dev->enclaves_list, + enclave_list_entry) { + if (ne_enclave_entry->slot_uid == ne_enclave->slot_uid) { + list_del(&ne_enclave_entry->enclave_list_entry); + + break; + } + } +} + static int ne_enclave_release(struct inode *inode, struct file *file) { + struct ne_pci_dev_cmd_reply cmd_reply = {}; + struct enclave_stop_req enclave_stop_request = {}; + struct ne_enclave *ne_enclave = file->private_data; + struct ne_pci_dev *ne_pci_dev = NULL; + int rc = -EINVAL; + struct slot_free_req slot_free_req = {}; + + if (!ne_enclave) + return 0; + + /* + * Early exit in case there is an error in the enclave creation logic + * and fput() is called on the cleanup path. + */ + if (!ne_enclave->slot_uid) + return 0; + + if (!ne_enclave->pdev) + return -EINVAL; + + ne_pci_dev = pci_get_drvdata(ne_enclave->pdev); + if (!ne_pci_dev) + return -EINVAL; + + /* + * Acquire the enclave list mutex before the enclave mutex + * in order to avoid deadlocks with @ref ne_event_work_handler. + */ + mutex_lock(&ne_pci_dev->enclaves_list_mutex); + mutex_lock(&ne_enclave->enclave_info_mutex); + + if (ne_enclave->state != NE_STATE_INIT && + ne_enclave->state != NE_STATE_STOPPED) { + enclave_stop_request.slot_uid = ne_enclave->slot_uid; + + rc = ne_do_request(ne_enclave->pdev, ENCLAVE_STOP, + &enclave_stop_request, + sizeof(enclave_stop_request), &cmd_reply, + sizeof(cmd_reply)); + if (rc < 0) { + pr_err_ratelimited(NE "Error in enclave stop [rc=%d]\n", + rc); + + goto unlock_mutex; + } + + memset(&cmd_reply, 0, sizeof(cmd_reply)); + } + + slot_free_req.slot_uid = ne_enclave->slot_uid; + + rc = ne_do_request(ne_enclave->pdev, SLOT_FREE, &slot_free_req, + sizeof(slot_free_req), &cmd_reply, + sizeof(cmd_reply)); + if (rc < 0) { + pr_err_ratelimited(NE "Error in slot free [rc=%d]\n", rc); + + goto unlock_mutex; + } + + ne_pci_dev_remove_enclave_entry(ne_enclave, ne_pci_dev); + ne_enclave_remove_all_mem_region_entries(ne_enclave); + ne_enclave_remove_all_vcpu_id_entries(ne_enclave); + + mutex_unlock(&ne_enclave->enclave_info_mutex); + mutex_unlock(&ne_pci_dev->enclaves_list_mutex); + + kfree(ne_enclave); + return 0; + +unlock_mutex: + mutex_unlock(&ne_enclave->enclave_info_mutex); + mutex_unlock(&ne_pci_dev->enclaves_list_mutex); + + return rc; } static __poll_t ne_enclave_poll(struct file *file, poll_table *wait) -- 2.20.1 (Apple Git-117) Amazon Development Center (Romania) S.R.L. registered office: 27A Sf. Lazar Street, UBC5, floor 2, Iasi, Iasi County, 700045, Romania. Registered in Romania. Registration number J22/2621/2005.