/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*/
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#ifndef _NE_MISC_DEV_H_
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#define _NE_MISC_DEV_H_
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#include <linux/cpumask.h>
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#include <linux/list.h>
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#include <linux/miscdevice.h>
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#include <linux/mm.h>
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#include <linux/mutex.h>
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#include <linux/pci.h>
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#include <linux/wait.h>
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#include "ne_pci_dev.h"
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/**
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* struct ne_mem_region - Entry in the enclave user space memory regions list.
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* @mem_region_list_entry: Entry in the list of enclave memory regions.
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* @memory_size: Size of the user space memory region.
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* @nr_pages: Number of pages that make up the memory region.
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* @pages: Pages that make up the user space memory region.
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* @userspace_addr: User space address of the memory region.
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*/
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struct ne_mem_region {
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struct list_head mem_region_list_entry;
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u64 memory_size;
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unsigned long nr_pages;
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struct page **pages;
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u64 userspace_addr;
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};
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/**
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* struct ne_enclave - Per-enclave data used for enclave lifetime management.
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* @enclave_info_mutex : Mutex for accessing this internal state.
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* @enclave_list_entry : Entry in the list of created enclaves.
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* @eventq: Wait queue used for out-of-band event notifications
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* triggered from the PCI device event handler to
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* the enclave process via the poll function.
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* @has_event: Variable used to determine if the out-of-band event
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* was triggered.
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* @max_mem_regions: The maximum number of memory regions that can be
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* handled by the hypervisor.
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* @mem_regions_list: Enclave user space memory regions list.
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* @mem_size: Enclave memory size.
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* @mm : Enclave process abstraction mm data struct.
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* @nr_mem_regions: Number of memory regions associated with the enclave.
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* @nr_parent_vm_cores : The size of the threads per core array. The
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* total number of CPU cores available on the
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* parent / primary VM.
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* @nr_threads_per_core: The number of threads that a full CPU core has.
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* @nr_vcpus: Number of vcpus associated with the enclave.
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* @numa_node: NUMA node of the enclave memory and CPUs.
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* @slot_uid: Slot unique id mapped to the enclave.
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* @state: Enclave state, updated during enclave lifetime.
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* @threads_per_core: Enclave full CPU cores array, indexed by core id,
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* consisting of cpumasks with all their threads.
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* Full CPU cores are taken from the NE CPU pool
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* and are available to the enclave.
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* @vcpu_ids: Cpumask of the vCPUs that are set for the enclave.
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*/
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struct ne_enclave {
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struct mutex enclave_info_mutex;
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struct list_head enclave_list_entry;
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wait_queue_head_t eventq;
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bool has_event;
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u64 max_mem_regions;
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struct list_head mem_regions_list;
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u64 mem_size;
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struct mm_struct *mm;
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unsigned int nr_mem_regions;
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unsigned int nr_parent_vm_cores;
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unsigned int nr_threads_per_core;
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unsigned int nr_vcpus;
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int numa_node;
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u64 slot_uid;
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u16 state;
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cpumask_var_t *threads_per_core;
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cpumask_var_t vcpu_ids;
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};
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/**
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* enum ne_state - States available for an enclave.
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* @NE_STATE_INIT: The enclave has not been started yet.
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* @NE_STATE_RUNNING: The enclave was started and is running as expected.
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* @NE_STATE_STOPPED: The enclave exited without userspace interaction.
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*/
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enum ne_state {
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NE_STATE_INIT = 0,
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NE_STATE_RUNNING = 2,
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NE_STATE_STOPPED = U16_MAX,
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};
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/**
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* struct ne_devs - Data structure to keep refs to the NE misc and PCI devices.
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* @ne_misc_dev: Nitro Enclaves misc device.
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* @ne_pci_dev : Nitro Enclaves PCI device.
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*/
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struct ne_devs {
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struct miscdevice *ne_misc_dev;
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struct ne_pci_dev *ne_pci_dev;
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};
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/* Nitro Enclaves (NE) data structure for keeping refs to the NE misc and PCI devices. */
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extern struct ne_devs ne_devs;
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#endif /* _NE_MISC_DEV_H_ */
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