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Edit File : sgx.h \| Size : 8.15 KB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note / / * Copyright(c) 2016-20 Intel Corporation. / #ifndef _ASM_X86_SGX_H #define _ASM_X86_SGX_H #include <linux/types.h> #include <linux/ioctl.h> /* * enum sgx_page_flags - page control flags * %SGX_PAGE_MEASURE: Measure the page contents with a sequence of * ENCLS[EEXTEND] operations. / enum sgx_page_flags { SGX_PAGE_MEASURE = 0x01, }; #define SGX_MAGIC 0xA4 #define SGX_IOC_ENCLAVE_CREATE \ _IOW(SGX_MAGIC, 0x00, struct sgx_enclave_create) #define SGX_IOC_ENCLAVE_ADD_PAGES \ _IOWR(SGX_MAGIC, 0x01, struct sgx_enclave_add_pages) #define SGX_IOC_ENCLAVE_INIT \ _IOW(SGX_MAGIC, 0x02, struct sgx_enclave_init) #define SGX_IOC_ENCLAVE_PROVISION \ _IOW(SGX_MAGIC, 0x03, struct sgx_enclave_provision) #define SGX_IOC_VEPC_REMOVE_ALL \ _IO(SGX_MAGIC, 0x04) #define SGX_IOC_ENCLAVE_RESTRICT_PERMISSIONS \ _IOWR(SGX_MAGIC, 0x05, struct sgx_enclave_restrict_permissions) #define SGX_IOC_ENCLAVE_MODIFY_TYPES \ _IOWR(SGX_MAGIC, 0x06, struct sgx_enclave_modify_types) #define SGX_IOC_ENCLAVE_REMOVE_PAGES \ _IOWR(SGX_MAGIC, 0x07, struct sgx_enclave_remove_pages) /* * struct sgx_enclave_create - parameter structure for the * %SGX_IOC_ENCLAVE_CREATE ioctl * @src: address for the SECS page data / struct sgx_enclave_create { __u64 src; }; /* * struct sgx_enclave_add_pages - parameter structure for the * %SGX_IOC_ENCLAVE_ADD_PAGE ioctl * @src: start address for the page data * @offset: starting page offset * @length: length of the data (multiple of the page size) * @secinfo: address for the SECINFO data * @flags: page control flags * @count: number of bytes added (multiple of the page size) / struct sgx_enclave_add_pages { __u64 src; __u64 offset; __u64 length; __u64 secinfo; __u64 flags; __u64 count; }; /* * struct sgx_enclave_init - parameter structure for the * %SGX_IOC_ENCLAVE_INIT ioctl * @sigstruct: address for the SIGSTRUCT data / struct sgx_enclave_init { __u64 sigstruct; }; /* * struct sgx_enclave_provision - parameter structure for the * %SGX_IOC_ENCLAVE_PROVISION ioctl * @fd: file handle of /dev/sgx_provision / struct sgx_enclave_provision { __u64 fd; }; /* * struct sgx_enclave_restrict_permissions - parameters for ioctl * %SGX_IOC_ENCLAVE_RESTRICT_PERMISSIONS * @offset: starting page offset (page aligned relative to enclave base * address defined in SECS) * @length: length of memory (multiple of the page size) * @permissions:new permission bits for pages in range described by @offset * and @length * @result: (output) SGX result code of ENCLS[EMODPR] function * @count: (output) bytes successfully changed (multiple of page size) / struct sgx_enclave_restrict_permissions { __u64 offset; __u64 length; __u64 permissions; __u64 result; __u64 count; }; /* * struct sgx_enclave_modify_types - parameters for ioctl * %SGX_IOC_ENCLAVE_MODIFY_TYPES * @offset: starting page offset (page aligned relative to enclave base * address defined in SECS) * @length: length of memory (multiple of the page size) * @page_type: new type for pages in range described by @offset and @length * @result: (output) SGX result code of ENCLS[EMODT] function * @count: (output) bytes successfully changed (multiple of page size) / struct sgx_enclave_modify_types { __u64 offset; __u64 length; __u64 page_type; __u64 result; __u64 count; }; /* * struct sgx_enclave_remove_pages - %SGX_IOC_ENCLAVE_REMOVE_PAGES parameters * @offset: starting page offset (page aligned relative to enclave base * address defined in SECS) * @length: length of memory (multiple of the page size) * @count: (output) bytes successfully changed (multiple of page size) * * Regular (PT_REG) or TCS (PT_TCS) can be removed from an initialized * enclave if the system supports SGX2. First, the %SGX_IOC_ENCLAVE_MODIFY_TYPES * ioctl() should be used to change the page type to PT_TRIM. After that * succeeds ENCLU[EACCEPT] should be run from within the enclave and then * %SGX_IOC_ENCLAVE_REMOVE_PAGES can be used to complete the page removal. / struct sgx_enclave_remove_pages { __u64 offset; __u64 length; __u64 count; }; struct sgx_enclave_run; /* * typedef sgx_enclave_user_handler_t - Exit handler function accepted by * __vdso_sgx_enter_enclave() * @run: The run instance given by the caller * * The register parameters contain the snapshot of their values at enclave * exit. An invalid ENCLU function number will cause -EINVAL to be returned * to the caller. * * Return: * - <= 0: The given value is returned back to the caller. * - > 0: ENCLU function to invoke, either EENTER or ERESUME. / typedef int (sgx_enclave_user_handler_t)(long rdi, long rsi, long rdx, long rsp, long r8, long r9, struct sgx_enclave_run run); /* * struct sgx_enclave_run - the execution context of __vdso_sgx_enter_enclave() * @tcs: TCS used to enter the enclave * @function: The last seen ENCLU function (EENTER, ERESUME or EEXIT) * @exception_vector: The interrupt vector of the exception * @exception_error_code: The exception error code pulled out of the stack * @exception_addr: The address that triggered the exception * @user_handler: User provided callback run on exception * @user_data: Data passed to the user handler * @reserved Reserved for future extensions * * If @user_handler is provided, the handler will be invoked on all return paths * of the normal flow. The user handler may transfer control, e.g. via a * longjmp() call or a C++ exception, without returning to * __vdso_sgx_enter_enclave(). / struct sgx_enclave_run { __u64 tcs; __u32 function; __u16 exception_vector; __u16 exception_error_code; __u64 exception_addr; __u64 user_handler; __u64 user_data; __u8 reserved[216]; }; /* * typedef vdso_sgx_enter_enclave_t - Prototype for __vdso_sgx_enter_enclave(), * a vDSO function to enter an SGX enclave. * @rdi: Pass-through value for RDI * @rsi: Pass-through value for RSI * @rdx: Pass-through value for RDX * @function: ENCLU function, must be EENTER or ERESUME * @r8: Pass-through value for R8 * @r9: Pass-through value for R9 * @run: struct sgx_enclave_run, must be non-NULL * * NOTE: __vdso_sgx_enter_enclave() does not ensure full compliance with the * x86-64 ABI, e.g. doesn't handle XSAVE state. Except for non-volatile * general purpose registers, EFLAGS.DF, and RSP alignment, preserving/setting * state in accordance with the x86-64 ABI is the responsibility of the enclave * and its runtime, i.e. __vdso_sgx_enter_enclave() cannot be called from C * code without careful consideration by both the enclave and its runtime. * * All general purpose registers except RAX, RBX and RCX are passed as-is to the * enclave. RAX, RBX and RCX are consumed by EENTER and ERESUME and are loaded * with @function, asynchronous exit pointer, and @run.tcs respectively. * * RBP and the stack are used to anchor __vdso_sgx_enter_enclave() to the * pre-enclave state, e.g. to retrieve @run.exception and @run.user_handler * after an enclave exit. All other registers are available for use by the * enclave and its runtime, e.g. an enclave can push additional data onto the * stack (and modify RSP) to pass information to the optional user handler (see * below). * * Most exceptions reported on ENCLU, including those that occur within the * enclave, are fixed up and reported synchronously instead of being delivered * via a standard signal. Debug Exceptions (#DB) and Breakpoints (#BP) are * never fixed up and are always delivered via standard signals. On synchrously * reported exceptions, -EFAULT is returned and details about the exception are * recorded in @run.exception, the optional sgx_enclave_exception struct. * * Return: * - 0: ENCLU function was successfully executed. * - -EINVAL: Invalid ENCL number (neither EENTER nor ERESUME). / typedef int (vdso_sgx_enter_enclave_t)(unsigned long rdi, unsigned long rsi, unsigned long rdx, unsigned int function, unsigned long r8, unsigned long r9, struct sgx_enclave_run run); #endif / _ASM_X86_SGX_H */ Back

Edit File : sgx.h | Size : 8.15 KB

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Copyright(c) 2016-20 Intel Corporation.
 */
#ifndef _ASM_X86_SGX_H
#define _ASM_X86_SGX_H

#include <linux/types.h>
#include <linux/ioctl.h>

/**
 * enum sgx_page_flags - page control flags
 * %SGX_PAGE_MEASURE:	Measure the page contents with a sequence of
 *			ENCLS[EEXTEND] operations.
 */
enum sgx_page_flags {
	SGX_PAGE_MEASURE	= 0x01,
};

#define SGX_MAGIC 0xA4

#define SGX_IOC_ENCLAVE_CREATE \
	_IOW(SGX_MAGIC, 0x00, struct sgx_enclave_create)
#define SGX_IOC_ENCLAVE_ADD_PAGES \
	_IOWR(SGX_MAGIC, 0x01, struct sgx_enclave_add_pages)
#define SGX_IOC_ENCLAVE_INIT \
	_IOW(SGX_MAGIC, 0x02, struct sgx_enclave_init)
#define SGX_IOC_ENCLAVE_PROVISION \
	_IOW(SGX_MAGIC, 0x03, struct sgx_enclave_provision)
#define SGX_IOC_VEPC_REMOVE_ALL \
	_IO(SGX_MAGIC, 0x04)
#define SGX_IOC_ENCLAVE_RESTRICT_PERMISSIONS \
	_IOWR(SGX_MAGIC, 0x05, struct sgx_enclave_restrict_permissions)
#define SGX_IOC_ENCLAVE_MODIFY_TYPES \
	_IOWR(SGX_MAGIC, 0x06, struct sgx_enclave_modify_types)
#define SGX_IOC_ENCLAVE_REMOVE_PAGES \
	_IOWR(SGX_MAGIC, 0x07, struct sgx_enclave_remove_pages)

/**
 * struct sgx_enclave_create - parameter structure for the
 *                             %SGX_IOC_ENCLAVE_CREATE ioctl
 * @src:	address for the SECS page data
 */
struct sgx_enclave_create  {
	__u64	src;
};

/**
 * struct sgx_enclave_add_pages - parameter structure for the
 *                                %SGX_IOC_ENCLAVE_ADD_PAGE ioctl
 * @src:	start address for the page data
 * @offset:	starting page offset
 * @length:	length of the data (multiple of the page size)
 * @secinfo:	address for the SECINFO data
 * @flags:	page control flags
 * @count:	number of bytes added (multiple of the page size)
 */
struct sgx_enclave_add_pages {
	__u64 src;
	__u64 offset;
	__u64 length;
	__u64 secinfo;
	__u64 flags;
	__u64 count;
};

/**
 * struct sgx_enclave_init - parameter structure for the
 *                           %SGX_IOC_ENCLAVE_INIT ioctl
 * @sigstruct:	address for the SIGSTRUCT data
 */
struct sgx_enclave_init {
	__u64 sigstruct;
};

/**
 * struct sgx_enclave_provision - parameter structure for the
 *				  %SGX_IOC_ENCLAVE_PROVISION ioctl
 * @fd:		file handle of /dev/sgx_provision
 */
struct sgx_enclave_provision {
	__u64 fd;
};

/**
 * struct sgx_enclave_restrict_permissions - parameters for ioctl
 *                                        %SGX_IOC_ENCLAVE_RESTRICT_PERMISSIONS
 * @offset:	starting page offset (page aligned relative to enclave base
 *		address defined in SECS)
 * @length:	length of memory (multiple of the page size)
 * @permissions:new permission bits for pages in range described by @offset
 *              and @length
 * @result:	(output) SGX result code of ENCLS[EMODPR] function
 * @count:	(output) bytes successfully changed (multiple of page size)
 */
struct sgx_enclave_restrict_permissions {
	__u64 offset;
	__u64 length;
	__u64 permissions;
	__u64 result;
	__u64 count;
};

/**
 * struct sgx_enclave_modify_types - parameters for ioctl
 *                                   %SGX_IOC_ENCLAVE_MODIFY_TYPES
 * @offset:	starting page offset (page aligned relative to enclave base
 *		address defined in SECS)
 * @length:	length of memory (multiple of the page size)
 * @page_type:	new type for pages in range described by @offset and @length
 * @result:	(output) SGX result code of ENCLS[EMODT] function
 * @count:	(output) bytes successfully changed (multiple of page size)
 */
struct sgx_enclave_modify_types {
	__u64 offset;
	__u64 length;
	__u64 page_type;
	__u64 result;
	__u64 count;
};

/**
 * struct sgx_enclave_remove_pages - %SGX_IOC_ENCLAVE_REMOVE_PAGES parameters
 * @offset:	starting page offset (page aligned relative to enclave base
 *		address defined in SECS)
 * @length:	length of memory (multiple of the page size)
 * @count:	(output) bytes successfully changed (multiple of page size)
 *
 * Regular (PT_REG) or TCS (PT_TCS) can be removed from an initialized
 * enclave if the system supports SGX2. First, the %SGX_IOC_ENCLAVE_MODIFY_TYPES
 * ioctl() should be used to change the page type to PT_TRIM. After that
 * succeeds ENCLU[EACCEPT] should be run from within the enclave and then
 * %SGX_IOC_ENCLAVE_REMOVE_PAGES can be used to complete the page removal.
 */
struct sgx_enclave_remove_pages {
	__u64 offset;
	__u64 length;
	__u64 count;
};

struct sgx_enclave_run;

/**
 * typedef sgx_enclave_user_handler_t - Exit handler function accepted by
 *					__vdso_sgx_enter_enclave()
 * @run:	The run instance given by the caller
 *
 * The register parameters contain the snapshot of their values at enclave
 * exit. An invalid ENCLU function number will cause -EINVAL to be returned
 * to the caller.
 *
 * Return:
 * - <= 0:	The given value is returned back to the caller.
 * - > 0:	ENCLU function to invoke, either EENTER or ERESUME.
 */
typedef int (*sgx_enclave_user_handler_t)(long rdi, long rsi, long rdx,
					  long rsp, long r8, long r9,
					  struct sgx_enclave_run *run);

/**
 * struct sgx_enclave_run - the execution context of __vdso_sgx_enter_enclave()
 * @tcs:			TCS used to enter the enclave
 * @function:			The last seen ENCLU function (EENTER, ERESUME or EEXIT)
 * @exception_vector:		The interrupt vector of the exception
 * @exception_error_code:	The exception error code pulled out of the stack
 * @exception_addr:		The address that triggered the exception
 * @user_handler:		User provided callback run on exception
 * @user_data:			Data passed to the user handler
 * @reserved			Reserved for future extensions
 *
 * If @user_handler is provided, the handler will be invoked on all return paths
 * of the normal flow.  The user handler may transfer control, e.g. via a
 * longjmp() call or a C++ exception, without returning to
 * __vdso_sgx_enter_enclave().
 */
struct sgx_enclave_run {
	__u64 tcs;
	__u32 function;
	__u16 exception_vector;
	__u16 exception_error_code;
	__u64 exception_addr;
	__u64 user_handler;
	__u64 user_data;
	__u8  reserved[216];
};

/**
 * typedef vdso_sgx_enter_enclave_t - Prototype for __vdso_sgx_enter_enclave(),
 *				      a vDSO function to enter an SGX enclave.
 * @rdi:	Pass-through value for RDI
 * @rsi:	Pass-through value for RSI
 * @rdx:	Pass-through value for RDX
 * @function:	ENCLU function, must be EENTER or ERESUME
 * @r8:		Pass-through value for R8
 * @r9:		Pass-through value for R9
 * @run:	struct sgx_enclave_run, must be non-NULL
 *
 * NOTE: __vdso_sgx_enter_enclave() does not ensure full compliance with the
 * x86-64 ABI, e.g. doesn't handle XSAVE state.  Except for non-volatile
 * general purpose registers, EFLAGS.DF, and RSP alignment, preserving/setting
 * state in accordance with the x86-64 ABI is the responsibility of the enclave
 * and its runtime, i.e. __vdso_sgx_enter_enclave() cannot be called from C
 * code without careful consideration by both the enclave and its runtime.
 *
 * All general purpose registers except RAX, RBX and RCX are passed as-is to the
 * enclave.  RAX, RBX and RCX are consumed by EENTER and ERESUME and are loaded
 * with @function, asynchronous exit pointer, and @run.tcs respectively.
 *
 * RBP and the stack are used to anchor __vdso_sgx_enter_enclave() to the
 * pre-enclave state, e.g. to retrieve @run.exception and @run.user_handler
 * after an enclave exit.  All other registers are available for use by the
 * enclave and its runtime, e.g. an enclave can push additional data onto the
 * stack (and modify RSP) to pass information to the optional user handler (see
 * below).
 *
 * Most exceptions reported on ENCLU, including those that occur within the
 * enclave, are fixed up and reported synchronously instead of being delivered
 * via a standard signal. Debug Exceptions (#DB) and Breakpoints (#BP) are
 * never fixed up and are always delivered via standard signals. On synchrously
 * reported exceptions, -EFAULT is returned and details about the exception are
 * recorded in @run.exception, the optional sgx_enclave_exception struct.
 *
 * Return:
 * - 0:		ENCLU function was successfully executed.
 * - -EINVAL:	Invalid ENCL number (neither EENTER nor ERESUME).
 */
typedef int (*vdso_sgx_enter_enclave_t)(unsigned long rdi, unsigned long rsi,
					unsigned long rdx, unsigned int function,
					unsigned long r8,  unsigned long r9,
					struct sgx_enclave_run *run);

#endif /* _ASM_X86_SGX_H */

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