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https://github.com/ARM-software/arm-trusted-firmware.git
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05c69cf75e
This adds the ability to load the OP-TEE image via an SMC called from non-secure userspace rather than loading it during boot. This should only be utilized on platforms that can ensure security is maintained up until the point the SMC is invoked as it breaks the normal barrier between the secure and non-secure world. Signed-off-by: Jeffrey Kardatzke <jkardatzke@google.com> Change-Id: I21cfa9699617c493fa4190f01d1cbb714e7449cc
164 lines
6.1 KiB
C
164 lines
6.1 KiB
C
/*
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* Copyright (c) 2013-2023, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef OPTEED_PRIVATE_H
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#define OPTEED_PRIVATE_H
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#include <platform_def.h>
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#include <arch.h>
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#include <bl31/interrupt_mgmt.h>
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#include <context.h>
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#include <lib/psci/psci.h>
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/*******************************************************************************
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* OPTEE PM state information e.g. OPTEE is suspended, uninitialised etc
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* and macros to access the state information in the per-cpu 'state' flags
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******************************************************************************/
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#define OPTEE_PSTATE_OFF 1
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#define OPTEE_PSTATE_ON 2
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#define OPTEE_PSTATE_SUSPEND 3
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#define OPTEE_PSTATE_UNKNOWN 0
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#define OPTEE_PSTATE_SHIFT 0
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#define OPTEE_PSTATE_MASK 0x3
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#define get_optee_pstate(state) ((state >> OPTEE_PSTATE_SHIFT) & \
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OPTEE_PSTATE_MASK)
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#define clr_optee_pstate(state) (state &= ~(OPTEE_PSTATE_MASK \
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<< OPTEE_PSTATE_SHIFT))
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#define set_optee_pstate(st, pst) do { \
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clr_optee_pstate(st); \
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st |= (pst & OPTEE_PSTATE_MASK) << \
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OPTEE_PSTATE_SHIFT; \
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} while (0)
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/*******************************************************************************
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* OPTEE execution state information i.e. aarch32 or aarch64
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******************************************************************************/
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#define OPTEE_AARCH32 MODE_RW_32
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#define OPTEE_AARCH64 MODE_RW_64
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/*******************************************************************************
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* The OPTEED should know the type of OPTEE
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******************************************************************************/
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#define OPTEE_TYPE_UP PSCI_TOS_NOT_UP_MIG_CAP
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#define OPTEE_TYPE_UPM PSCI_TOS_UP_MIG_CAP
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#define OPTEE_TYPE_MP PSCI_TOS_NOT_PRESENT_MP
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/*******************************************************************************
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* OPTEE migrate type information as known to the OPTEED. We assume that
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* the OPTEED is dealing with an MP Secure Payload.
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******************************************************************************/
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#define OPTEE_MIGRATE_INFO OPTEE_TYPE_MP
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/*******************************************************************************
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* Number of cpus that the present on this platform. TODO: Rely on a topology
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* tree to determine this in the future to avoid assumptions about mpidr
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* allocation
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******************************************************************************/
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#define OPTEED_CORE_COUNT PLATFORM_CORE_COUNT
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/*******************************************************************************
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* Constants that allow assembler code to preserve callee-saved registers of the
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* C runtime context while performing a security state switch.
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******************************************************************************/
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#define OPTEED_C_RT_CTX_X19 0x0
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#define OPTEED_C_RT_CTX_X20 0x8
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#define OPTEED_C_RT_CTX_X21 0x10
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#define OPTEED_C_RT_CTX_X22 0x18
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#define OPTEED_C_RT_CTX_X23 0x20
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#define OPTEED_C_RT_CTX_X24 0x28
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#define OPTEED_C_RT_CTX_X25 0x30
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#define OPTEED_C_RT_CTX_X26 0x38
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#define OPTEED_C_RT_CTX_X27 0x40
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#define OPTEED_C_RT_CTX_X28 0x48
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#define OPTEED_C_RT_CTX_X29 0x50
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#define OPTEED_C_RT_CTX_X30 0x58
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#define OPTEED_C_RT_CTX_SIZE 0x60
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#define OPTEED_C_RT_CTX_ENTRIES (OPTEED_C_RT_CTX_SIZE >> DWORD_SHIFT)
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#ifndef __ASSEMBLER__
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#include <stdint.h>
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#include <lib/cassert.h>
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typedef uint32_t optee_vector_isn_t;
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typedef struct optee_vectors {
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optee_vector_isn_t yield_smc_entry;
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optee_vector_isn_t fast_smc_entry;
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optee_vector_isn_t cpu_on_entry;
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optee_vector_isn_t cpu_off_entry;
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optee_vector_isn_t cpu_resume_entry;
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optee_vector_isn_t cpu_suspend_entry;
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optee_vector_isn_t fiq_entry;
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optee_vector_isn_t system_off_entry;
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optee_vector_isn_t system_reset_entry;
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} optee_vectors_t;
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/*
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* The number of arguments to save during a SMC call for OPTEE.
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* Currently only x1 and x2 are used by OPTEE.
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*/
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#define OPTEE_NUM_ARGS 0x2
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/* AArch64 callee saved general purpose register context structure. */
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DEFINE_REG_STRUCT(c_rt_regs, OPTEED_C_RT_CTX_ENTRIES);
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/*
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* Compile time assertion to ensure that both the compiler and linker
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* have the same double word aligned view of the size of the C runtime
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* register context.
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*/
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CASSERT(OPTEED_C_RT_CTX_SIZE == sizeof(c_rt_regs_t), \
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assert_spd_c_rt_regs_size_mismatch);
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/*******************************************************************************
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* Structure which helps the OPTEED to maintain the per-cpu state of OPTEE.
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* 'state' - collection of flags to track OPTEE state e.g. on/off
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* 'mpidr' - mpidr to associate a context with a cpu
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* 'c_rt_ctx' - stack address to restore C runtime context from after
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* returning from a synchronous entry into OPTEE.
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* 'cpu_ctx' - space to maintain OPTEE architectural state
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******************************************************************************/
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typedef struct optee_context {
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uint32_t state;
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uint64_t mpidr;
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uint64_t c_rt_ctx;
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cpu_context_t cpu_ctx;
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} optee_context_t;
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/* OPTEED power management handlers */
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extern const spd_pm_ops_t opteed_pm;
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/*******************************************************************************
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* Forward declarations
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******************************************************************************/
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struct optee_vectors;
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/*******************************************************************************
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* Function & Data prototypes
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******************************************************************************/
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uint64_t opteed_enter_sp(uint64_t *c_rt_ctx);
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void __dead2 opteed_exit_sp(uint64_t c_rt_ctx, uint64_t ret);
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uint64_t opteed_synchronous_sp_entry(optee_context_t *optee_ctx);
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void __dead2 opteed_synchronous_sp_exit(optee_context_t *optee_ctx, uint64_t ret);
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void opteed_init_optee_ep_state(struct entry_point_info *optee_entry_point,
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uint32_t rw,
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uint64_t pc,
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uint64_t pageable_part,
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uint64_t mem_limit,
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uint64_t dt_addr,
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optee_context_t *optee_ctx);
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void opteed_cpu_on_finish_handler(u_register_t unused);
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extern optee_context_t opteed_sp_context[OPTEED_CORE_COUNT];
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extern uint32_t opteed_rw;
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extern struct optee_vectors *optee_vector_table;
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#endif /*__ASSEMBLER__*/
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#endif /* OPTEED_PRIVATE_H */
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