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From: Andra Paraschiv <andraprs@amazon.com>
To: <linux-kernel@vger.kernel.org>
Cc: Anthony Liguori <aliguori@amazon.com>,
	Benjamin Herrenschmidt <benh@amazon.com>,
	Colm MacCarthaigh <colmmacc@amazon.com>,
	Bjoern Doebel <doebel@amazon.de>,
	David Woodhouse <dwmw@amazon.co.uk>,
	Frank van der Linden <fllinden@amazon.com>,
	Alexander Graf <graf@amazon.de>,
	Martin Pohlack <mpohlack@amazon.de>, Matt Wilson <msw@amazon.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Balbir Singh <sblbir@amazon.com>,
	Stewart Smith <trawets@amazon.com>,
	Uwe Dannowski <uwed@amazon.de>, <kvm@vger.kernel.org>,
	<ne-devel-upstream@amazon.com>,
	Andra Paraschiv <andraprs@amazon.com>
Subject: [PATCH v1 03/15] nitro_enclaves: Define enclave info for internal bookkeeping
Date: Tue, 21 Apr 2020 21:41:38 +0300
Message-ID: <20200421184150.68011-4-andraprs@amazon.com> (raw)
In-Reply-To: <20200421184150.68011-1-andraprs@amazon.com>

The Nitro Enclaves driver keeps an internal info per each enclave.

This is needed to be able to manage enclave resources state, enclave
notifications and have a reference of the PCI device that handles
command requests for enclave lifetime management.

Signed-off-by: Alexandru-Catalin Vasile <lexnv@amazon.com>
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
---
 .../virt/amazon/nitro_enclaves/ne_misc_dev.h  | 120 ++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 drivers/virt/amazon/nitro_enclaves/ne_misc_dev.h

diff --git a/drivers/virt/amazon/nitro_enclaves/ne_misc_dev.h b/drivers/virt/amazon/nitro_enclaves/ne_misc_dev.h
new file mode 100644
index 000000000000..dece3ead86b9
--- /dev/null
+++ b/drivers/virt/amazon/nitro_enclaves/ne_misc_dev.h
@@ -0,0 +1,120 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _NE_MISC_DEV_H_
+#define _NE_MISC_DEV_H_
+
+#include <linux/cpumask.h>
+#include <linux/list.h>
+#include <linux/miscdevice.h>
+#include <linux/mm.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/wait.h>
+
+/* Entry in vCPU IDs list. */
+struct ne_vcpu_id {
+	/* CPU id associated with a given slot, apic id on x86. */
+	u32 vcpu_id;
+
+	struct list_head vcpu_id_list_entry;
+};
+
+/* Entry in memory regions list. */
+struct ne_mem_region {
+	struct list_head mem_region_list_entry;
+
+	/* Number of pages that make up the memory region. */
+	unsigned long nr_pages;
+
+	/* Pages that make up the user space memory region. */
+	struct page **pages;
+};
+
+/* Per-enclave data used for enclave lifetime management. */
+struct ne_enclave {
+	/**
+	 * CPU pool with siblings of already allocated CPUs to an enclave.
+	 * This is used when a CPU pool is set, to be able to know the CPU
+	 * siblings for the hyperthreading (HT) setup.
+	 */
+	cpumask_var_t cpu_siblings;
+
+	struct list_head enclave_list_entry;
+
+	/* Mutex for accessing this internal state. */
+	struct mutex enclave_info_mutex;
+
+	/**
+	 * Wait queue used for out-of-band event notifications
+	 * triggered from the PCI device event handler to the enclave
+	 * process via the poll function.
+	 */
+	wait_queue_head_t eventq;
+
+	/* Variable used to determine if the out-of-band event was triggered. */
+	bool has_event;
+
+	/**
+	 * The maximum number of memory regions that can be handled by the
+	 * lower levels.
+	 */
+	u64 max_mem_regions;
+
+	/* Enclave memory regions list. */
+	struct list_head mem_regions_list;
+
+	/* Enclave process abstraction mm data struct. */
+	struct mm_struct *mm;
+
+	/* PCI device used for enclave lifetime management. */
+	struct pci_dev *pdev;
+
+	/* Slot unique id mapped to the enclave. */
+	u64 slot_uid;
+
+	/* Enclave state, updated during enclave lifetime. */
+	u16 state;
+
+	/* Enclave vCPUs list. */
+	struct list_head vcpu_ids_list;
+};
+
+/**
+ * States available for an enclave.
+ *
+ * TODO: Determine if the following states are exposing enough information
+ * to the kernel driver.
+ */
+enum ne_state {
+	/* NE_ENCLAVE_START ioctl was never issued for the enclave. */
+	NE_STATE_INIT = 0,
+
+	/**
+	 * NE_ENCLAVE_START ioctl was issued and the enclave is running
+	 * as expected.
+	 */
+	NE_STATE_RUNNING = 2,
+
+	/* Enclave exited without userspace interaction. */
+	NE_STATE_STOPPED = U16_MAX,
+};
+
+/* Nitro Enclaves (NE) misc device */
+extern struct miscdevice ne_miscdevice;
+
+#endif /* _NE_MISC_DEV_H_ */
-- 
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.


  parent reply index

Thread overview: 77+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-21 18:41 [PATCH v1 00/15] Add support for Nitro Enclaves Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 01/15] nitro_enclaves: Add ioctl interface definition Andra Paraschiv
2020-04-21 18:47   ` Randy Dunlap
2020-04-21 21:45     ` Paolo Bonzini
2020-04-22 15:49       ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 02/15] nitro_enclaves: Define the PCI device interface Andra Paraschiv
2020-04-21 21:22   ` Paolo Bonzini
2020-04-23 13:37     ` Paraschiv, Andra-Irina
2020-04-24 15:10       ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` Andra Paraschiv [this message]
2020-04-21 18:41 ` [PATCH v1 04/15] nitro_enclaves: Init PCI device driver Andra Paraschiv
2020-04-25 14:25   ` Liran Alon
2020-04-29 16:31     ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 05/15] nitro_enclaves: Handle PCI device command requests Andra Paraschiv
2020-04-25 14:52   ` Liran Alon
2020-04-29 17:00     ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 06/15] nitro_enclaves: Handle out-of-band PCI device events Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 07/15] nitro_enclaves: Init misc device providing the ioctl interface Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 08/15] nitro_enclaves: Add logic for enclave vm creation Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 09/15] nitro_enclaves: Add logic for enclave vcpu creation Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 10/15] nitro_enclaves: Add logic for enclave memory region set Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 11/15] nitro_enclaves: Add logic for enclave start Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 12/15] nitro_enclaves: Add logic for enclave termination Andra Paraschiv
2020-04-21 18:41 ` [PATCH v1 13/15] nitro_enclaves: Add Kconfig for the Nitro Enclaves driver Andra Paraschiv
2020-04-21 18:50   ` Randy Dunlap
2020-04-22 14:35     ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 14/15] nitro_enclaves: Add Makefile " Andra Paraschiv
2020-04-23  8:12   ` kbuild test robot
2020-04-24 17:00     ` Paraschiv, Andra-Irina
2020-04-23  8:43   ` kbuild test robot
2020-04-24 15:27     ` Paraschiv, Andra-Irina
2020-04-21 18:41 ` [PATCH v1 15/15] MAINTAINERS: Add entry " Andra Paraschiv
2020-04-21 21:46 ` [PATCH v1 00/15] Add support for Nitro Enclaves Paolo Bonzini
2020-04-23 13:19   ` Paraschiv, Andra-Irina
2020-04-23 13:42     ` Paolo Bonzini
2020-04-23 17:42       ` Paraschiv, Andra-Irina
2020-04-23 17:51         ` Paolo Bonzini
2020-04-23 20:56           ` Alexander Graf
2020-04-23 21:18             ` Paolo Bonzini
2020-04-24 12:56               ` Alexander Graf
2020-04-24 16:27                 ` Paolo Bonzini
2020-04-24 19:11                   ` Alexander Graf
2020-04-25 16:05                     ` Paolo Bonzini
2020-04-27  9:15                       ` Paraschiv, Andra-Irina
2020-04-27  9:22                       ` Paraschiv, Andra-Irina
2020-04-27  9:46                         ` Paolo Bonzini
2020-04-27 10:00                           ` Paraschiv, Andra-Irina
2020-04-28 15:07                       ` Alexander Graf
2020-04-29 13:20                         ` Paolo Bonzini
2020-04-30 13:59                           ` Paraschiv, Andra-Irina
2020-04-30 10:34                         ` Paolo Bonzini
2020-04-30 11:21                           ` Alexander Graf
2020-04-30 11:38                             ` Paolo Bonzini
2020-04-30 11:47                               ` Alexander Graf
2020-04-30 11:58                                 ` Paolo Bonzini
2020-04-30 12:19                                   ` Alexander Graf
2020-05-07 17:44       ` Pavel Machek
2020-05-08  7:00         ` Paraschiv, Andra-Irina
2020-05-09 19:21           ` Pavel Machek
2020-05-10 11:02             ` Herrenschmidt, Benjamin
2020-05-11 10:49               ` Paraschiv, Andra-Irina
2020-05-11 13:49               ` Stefan Hajnoczi
2020-04-24  3:04     ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2020-04-24  8:19       ` Paraschiv, Andra-Irina
2020-04-24  9:54         ` Paraschiv, Andra-Irina
2020-04-26  1:55           ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2020-04-27 18:39             ` Paraschiv, Andra-Irina
2020-04-24  9:59     ` Tian, Kevin
2020-04-24 13:59       ` Paraschiv, Andra-Irina
2020-04-26  8:16         ` Tian, Kevin
2020-04-27 19:05           ` Paraschiv, Andra-Irina
     [not found]         ` <CAKXe6SLonLQLAOY9Q_2AzTeg4uJxiknsAWnJpTF0hMcXEG5Tew@mail.gmail.com>
2020-05-11 12:05           ` Paraschiv, Andra-Irina
2020-04-25 15:25     ` Liran Alon
2020-04-27  7:56       ` Paraschiv, Andra-Irina
2020-04-27 11:44         ` Liran Alon
2020-04-28 15:25           ` Alexander Graf
2020-04-28 16:01             ` Liran Alon

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