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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * Copyright 2020 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 succesfully 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 succesfully 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 succesfully 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 succesfully 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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