Current File : //usr/include/linux/nitro_enclaves.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Copyright 2020-2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*/
#ifndef _LINUX_NITRO_ENCLAVES_H_
#define _LINUX_NITRO_ENCLAVES_H_
#include <linux/types.h>
/**
* DOC: Nitro Enclaves (NE) Kernel Driver Interface
*/
/**
* NE_CREATE_VM - The command is used to create a slot that is associated with
* an enclave VM.
* The generated unique slot id is an output parameter.
* The ioctl can be invoked on the /dev/nitro_enclaves fd, before
* setting any resources, such as memory and vCPUs, for an
* enclave. Memory and vCPUs are set for the slot mapped to an enclave.
* A NE CPU pool has to be set before calling this function. The
* pool can be set after the NE driver load, using
* /sys/module/nitro_enclaves/parameters/ne_cpus.
* Its format is the detailed in the cpu-lists section:
* https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
* CPU 0 and its siblings have to remain available for the
* primary / parent VM, so they cannot be set for enclaves. Full
* CPU core(s), from the same NUMA node, need(s) to be included
* in the CPU pool.
*
* Context: Process context.
* Return:
* * Enclave file descriptor - Enclave file descriptor used with
* ioctl calls to set vCPUs and memory
* regions, then start the enclave.
* * -1 - There was a failure in the ioctl logic.
* On failure, errno is set to:
* * EFAULT - copy_to_user() failure.
* * ENOMEM - Memory allocation failure for internal
* bookkeeping variables.
* * NE_ERR_NO_CPUS_AVAIL_IN_POOL - No NE CPU pool set / no CPUs available
* in the pool.
* * Error codes from get_unused_fd_flags() and anon_inode_getfile().
* * Error codes from the NE PCI device request.
*/
#define NE_CREATE_VM _IOR(0xAE, 0x20, __u64)
/**
* NE_ADD_VCPU - The command is used to set a vCPU for an enclave. The vCPU can
* be auto-chosen from the NE CPU pool or it can be set by the
* caller, with the note that it needs to be available in the NE
* CPU pool. Full CPU core(s), from the same NUMA node, need(s) to
* be associated with an enclave.
* The vCPU id is an input / output parameter. If its value is 0,
* then a CPU is chosen from the enclave CPU pool and returned via
* this parameter.
* The ioctl can be invoked on the enclave fd, before an enclave
* is started.
*
* Context: Process context.
* Return:
* * 0 - Logic successfully completed.
* * -1 - There was a failure in the ioctl logic.
* On failure, errno is set to:
* * EFAULT - copy_from_user() / copy_to_user() failure.
* * ENOMEM - Memory allocation failure for internal
* bookkeeping variables.
* * EIO - Current task mm is not the same as the one
* that created the enclave.
* * NE_ERR_NO_CPUS_AVAIL_IN_POOL - No CPUs available in the NE CPU pool.
* * NE_ERR_VCPU_ALREADY_USED - The provided vCPU is already used.
* * NE_ERR_VCPU_NOT_IN_CPU_POOL - The provided vCPU is not available in the
* NE CPU pool.
* * NE_ERR_VCPU_INVALID_CPU_CORE - The core id of the provided vCPU is invalid
* or out of range.
* * NE_ERR_NOT_IN_INIT_STATE - The enclave is not in init state
* (init = before being started).
* * NE_ERR_INVALID_VCPU - The provided vCPU is not in the available
* CPUs range.
* * Error codes from the NE PCI device request.
*/
#define NE_ADD_VCPU _IOWR(0xAE, 0x21, __u32)
/**
* NE_GET_IMAGE_LOAD_INFO - The command is used to get information needed for
* in-memory enclave image loading e.g. offset in
* enclave memory to start placing the enclave image.
* The image load info is an input / output parameter.
* It includes info provided by the caller - flags -
* and returns the offset in enclave memory where to
* start placing the enclave image.
* The ioctl can be invoked on the enclave fd, before
* an enclave is started.
*
* Context: Process context.
* Return:
* * 0 - Logic successfully completed.
* * -1 - There was a failure in the ioctl logic.
* On failure, errno is set to:
* * EFAULT - copy_from_user() / copy_to_user() failure.
* * NE_ERR_NOT_IN_INIT_STATE - The enclave is not in init state (init =
* before being started).
* * NE_ERR_INVALID_FLAG_VALUE - The value of the provided flag is invalid.
*/
#define NE_GET_IMAGE_LOAD_INFO _IOWR(0xAE, 0x22, struct ne_image_load_info)
/**
* NE_SET_USER_MEMORY_REGION - The command is used to set a memory region for an
* enclave, given the allocated memory from the
* userspace. Enclave memory needs to be from the
* same NUMA node as the enclave CPUs.
* The user memory region is an input parameter. It
* includes info provided by the caller - flags,
* memory size and userspace address.
* The ioctl can be invoked on the enclave fd,
* before an enclave is started.
*
* Context: Process context.
* Return:
* * 0 - Logic successfully completed.
* * -1 - There was a failure in the ioctl logic.
* On failure, errno is set to:
* * EFAULT - copy_from_user() failure.
* * EINVAL - Invalid physical memory region(s) e.g.
* unaligned address.
* * EIO - Current task mm is not the same as
* the one that created the enclave.
* * ENOMEM - Memory allocation failure for internal
* bookkeeping variables.
* * NE_ERR_NOT_IN_INIT_STATE - The enclave is not in init state
* (init = before being started).
* * NE_ERR_INVALID_MEM_REGION_SIZE - The memory size of the region is not
* multiple of 2 MiB.
* * NE_ERR_INVALID_MEM_REGION_ADDR - Invalid user space address given.
* * NE_ERR_UNALIGNED_MEM_REGION_ADDR - Unaligned user space address given.
* * NE_ERR_MEM_REGION_ALREADY_USED - The memory region is already used.
* * NE_ERR_MEM_NOT_HUGE_PAGE - The memory region is not backed by
* huge pages.
* * NE_ERR_MEM_DIFFERENT_NUMA_NODE - The memory region is not from the same
* NUMA node as the CPUs.
* * NE_ERR_MEM_MAX_REGIONS - The number of memory regions set for
* the enclave reached maximum.
* * NE_ERR_INVALID_PAGE_SIZE - The memory region is not backed by
* pages multiple of 2 MiB.
* * NE_ERR_INVALID_FLAG_VALUE - The value of the provided flag is invalid.
* * Error codes from get_user_pages().
* * Error codes from the NE PCI device request.
*/
#define NE_SET_USER_MEMORY_REGION _IOW(0xAE, 0x23, struct ne_user_memory_region)
/**
* NE_START_ENCLAVE - The command is used to trigger enclave start after the
* enclave resources, such as memory and CPU, have been set.
* The enclave start info is an input / output parameter. It
* includes info provided by the caller - enclave cid and
* flags - and returns the cid (if input cid is 0).
* The ioctl can be invoked on the enclave fd, after an
* enclave slot is created and resources, such as memory and
* vCPUs are set for an enclave.
*
* Context: Process context.
* Return:
* * 0 - Logic successfully completed.
* * -1 - There was a failure in the ioctl logic.
* On failure, errno is set to:
* * EFAULT - copy_from_user() / copy_to_user() failure.
* * NE_ERR_NOT_IN_INIT_STATE - The enclave is not in init state
* (init = before being started).
* * NE_ERR_NO_MEM_REGIONS_ADDED - No memory regions are set.
* * NE_ERR_NO_VCPUS_ADDED - No vCPUs are set.
* * NE_ERR_FULL_CORES_NOT_USED - Full core(s) not set for the enclave.
* * NE_ERR_ENCLAVE_MEM_MIN_SIZE - Enclave memory is less than minimum
* memory size (64 MiB).
* * NE_ERR_INVALID_FLAG_VALUE - The value of the provided flag is invalid.
* * NE_ERR_INVALID_ENCLAVE_CID - The provided enclave CID is invalid.
* * Error codes from the NE PCI device request.
*/
#define NE_START_ENCLAVE _IOWR(0xAE, 0x24, struct ne_enclave_start_info)
/**
* DOC: NE specific error codes
*/
/**
* NE_ERR_VCPU_ALREADY_USED - The provided vCPU is already used.
*/
#define NE_ERR_VCPU_ALREADY_USED (256)
/**
* NE_ERR_VCPU_NOT_IN_CPU_POOL - The provided vCPU is not available in the
* NE CPU pool.
*/
#define NE_ERR_VCPU_NOT_IN_CPU_POOL (257)
/**
* NE_ERR_VCPU_INVALID_CPU_CORE - The core id of the provided vCPU is invalid
* or out of range of the NE CPU pool.
*/
#define NE_ERR_VCPU_INVALID_CPU_CORE (258)
/**
* NE_ERR_INVALID_MEM_REGION_SIZE - The user space memory region size is not
* multiple of 2 MiB.
*/
#define NE_ERR_INVALID_MEM_REGION_SIZE (259)
/**
* NE_ERR_INVALID_MEM_REGION_ADDR - The user space memory region address range
* is invalid.
*/
#define NE_ERR_INVALID_MEM_REGION_ADDR (260)
/**
* NE_ERR_UNALIGNED_MEM_REGION_ADDR - The user space memory region address is
* not aligned.
*/
#define NE_ERR_UNALIGNED_MEM_REGION_ADDR (261)
/**
* NE_ERR_MEM_REGION_ALREADY_USED - The user space memory region is already used.
*/
#define NE_ERR_MEM_REGION_ALREADY_USED (262)
/**
* NE_ERR_MEM_NOT_HUGE_PAGE - The user space memory region is not backed by
* contiguous physical huge page(s).
*/
#define NE_ERR_MEM_NOT_HUGE_PAGE (263)
/**
* NE_ERR_MEM_DIFFERENT_NUMA_NODE - The user space memory region is backed by
* pages from different NUMA nodes than the CPUs.
*/
#define NE_ERR_MEM_DIFFERENT_NUMA_NODE (264)
/**
* NE_ERR_MEM_MAX_REGIONS - The supported max memory regions per enclaves has
* been reached.
*/
#define NE_ERR_MEM_MAX_REGIONS (265)
/**
* NE_ERR_NO_MEM_REGIONS_ADDED - The command to start an enclave is triggered
* and no memory regions are added.
*/
#define NE_ERR_NO_MEM_REGIONS_ADDED (266)
/**
* NE_ERR_NO_VCPUS_ADDED - The command to start an enclave is triggered and no
* vCPUs are added.
*/
#define NE_ERR_NO_VCPUS_ADDED (267)
/**
* NE_ERR_ENCLAVE_MEM_MIN_SIZE - The enclave memory size is lower than the
* minimum supported.
*/
#define NE_ERR_ENCLAVE_MEM_MIN_SIZE (268)
/**
* NE_ERR_FULL_CORES_NOT_USED - The command to start an enclave is triggered and
* full CPU cores are not set.
*/
#define NE_ERR_FULL_CORES_NOT_USED (269)
/**
* NE_ERR_NOT_IN_INIT_STATE - The enclave is not in init state when setting
* resources or triggering start.
*/
#define NE_ERR_NOT_IN_INIT_STATE (270)
/**
* NE_ERR_INVALID_VCPU - The provided vCPU is out of range of the available CPUs.
*/
#define NE_ERR_INVALID_VCPU (271)
/**
* NE_ERR_NO_CPUS_AVAIL_IN_POOL - The command to create an enclave is triggered
* and no CPUs are available in the pool.
*/
#define NE_ERR_NO_CPUS_AVAIL_IN_POOL (272)
/**
* NE_ERR_INVALID_PAGE_SIZE - The user space memory region is not backed by pages
* multiple of 2 MiB.
*/
#define NE_ERR_INVALID_PAGE_SIZE (273)
/**
* NE_ERR_INVALID_FLAG_VALUE - The provided flag value is invalid.
*/
#define NE_ERR_INVALID_FLAG_VALUE (274)
/**
* NE_ERR_INVALID_ENCLAVE_CID - The provided enclave CID is invalid, either
* being a well-known value or the CID of the
* parent / primary VM.
*/
#define NE_ERR_INVALID_ENCLAVE_CID (275)
/**
* DOC: Image load info flags
*/
/**
* NE_EIF_IMAGE - Enclave Image Format (EIF)
*/
#define NE_EIF_IMAGE (0x01)
#define NE_IMAGE_LOAD_MAX_FLAG_VAL (0x02)
/**
* struct ne_image_load_info - Info necessary for in-memory enclave image
* loading (in / out).
* @flags: Flags to determine the enclave image type
* (e.g. Enclave Image Format - EIF) (in).
* @memory_offset: Offset in enclave memory where to start placing the
* enclave image (out).
*/
struct ne_image_load_info {
__u64 flags;
__u64 memory_offset;
};
/**
* DOC: User memory region flags
*/
/**
* NE_DEFAULT_MEMORY_REGION - Memory region for enclave general usage.
*/
#define NE_DEFAULT_MEMORY_REGION (0x00)
#define NE_MEMORY_REGION_MAX_FLAG_VAL (0x01)
/**
* struct ne_user_memory_region - Memory region to be set for an enclave (in).
* @flags: Flags to determine the usage for the memory region (in).
* @memory_size: The size, in bytes, of the memory region to be set for
* an enclave (in).
* @userspace_addr: The start address of the userspace allocated memory of
* the memory region to set for an enclave (in).
*/
struct ne_user_memory_region {
__u64 flags;
__u64 memory_size;
__u64 userspace_addr;
};
/**
* DOC: Enclave start info flags
*/
/**
* NE_ENCLAVE_PRODUCTION_MODE - Start enclave in production mode.
*/
#define NE_ENCLAVE_PRODUCTION_MODE (0x00)
/**
* NE_ENCLAVE_DEBUG_MODE - Start enclave in debug mode.
*/
#define NE_ENCLAVE_DEBUG_MODE (0x01)
#define NE_ENCLAVE_START_MAX_FLAG_VAL (0x02)
/**
* struct ne_enclave_start_info - Setup info necessary for enclave start (in / out).
* @flags: Flags for the enclave to start with (e.g. debug mode) (in).
* @enclave_cid: Context ID (CID) for the enclave vsock device. If 0 as
* input, the CID is autogenerated by the hypervisor and
* returned back as output by the driver (in / out).
*/
struct ne_enclave_start_info {
__u64 flags;
__u64 enclave_cid;
};
#endif /* _LINUX_NITRO_ENCLAVES_H_ */
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