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