/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Copyright 2020 - 2021 Amazon . com , Inc . or its affiliates . All Rights Reserved .
*/
#ifndef _UAPI_LINUX_NITRO_ENCLAVES_H_
#define _UAPI_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(0 xAE, 0 x20, __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(0 xAE, 0 x21, __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(0 xAE, 0 x22, 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(0 xAE, 0 x23, 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(0 xAE, 0 x24, 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 (0 x01)
#define NE_IMAGE_LOAD_MAX_FLAG_VAL (0 x02)
/**
* 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 (0 x00)
#define NE_MEMORY_REGION_MAX_FLAG_VAL (0 x01)
/**
* 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 (0 x00)
/**
* NE_ENCLAVE_DEBUG_MODE - Start enclave in debug mode .
*/
#define NE_ENCLAVE_DEBUG_MODE (0 x01)
#define NE_ENCLAVE_START_MAX_FLAG_VAL (0 x02)
/**
* 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 /* _UAPI_LINUX_NITRO_ENCLAVES_H_ */
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