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Secure interrupt (interrupt belongs to TEE) comes when TEE vcpu is running, the interrupt will be injected to TEE directly. But when REE vcpu is running at that time, we need to switch to TEE for handling. Non-Secure interrupt (interrupt belongs to REE) comes when REE vcpu is running, the interrupt will be injected to REE directly. But when TEE vcpu is running at that time, we need to inject a predefined vector to TEE for notification and continue to switch back to TEE for running. To sum up, when secure interrupt comes, switch to TEE immediately regardless of whether REE is running or not; when non-Secure interrupt comes and TEE is running, just notify the TEE and keep it running, TEE will switch to REE on its own initiative after completing its work. Tracked-On: projectacrn#6571 Signed-off-by: Jie Deng <jie.deng@intel.com> Reviewed-by: Wang, Yu1 <yu1.wang@intel.com> Acked-by: Eddie Dong <eddie.dong@Intel.com>
26 lines
683 B
C
26 lines
683 B
C
/*
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* Copyright (C) 2021 Intel Corporation. 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 TEE_H_
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#define TEE_H_
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#include <asm/guest/vm.h>
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#include <asm/vm_config.h>
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#include <ptdev.h>
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#define TEE_NOTIFICATION_VECTOR 0x29U
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/* If the RDI equals to this value, then this is a RETURN after FIQ DONE */
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#define OPTEE_RETURN_FIQ_DONE 0xBE000006UL
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/* This value tells OPTEE that this switch to TEE is due to secure interrupt */
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#define OPTEE_FIQ_ENTRY 0xB20000FFUL
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void prepare_tee_vm_memmap(struct acrn_vm *vm, const struct acrn_vm_config *vm_config);
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void handle_x86_tee_int(struct ptirq_remapping_info *entry, uint16_t pcpu_id);
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#endif /* TEE_H_ */
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