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10963b04d1
In lock instruction emulation, we use vcpu_make_request and signal_event pairs to shoot down/release other vcpus. However, vcpu_make_request is async and does not guarantee an execution of wait_event on target vcpu, and we want wait_event to be consistent with signal_event. Consider following scenarios: 1, When target vcpu's state has not yet turned to VCPU_RUNNING, vcpu_make_request on ACRN_REQUEST_SPLIT_LOCK does not make sense, and will not result in wait_event. 2, When target vcpu is already requested on ACRN_REQUEST_SPLIT_LOCK (i.e., the corresponding bit in pending_req is set) but not yet handled, the vcpu_make_request call does not result in wait_event as 1 bit is not enough to cache multiple requests. This patch tries to add checks in vcpu_kick_lock_instr_emulation and vcpu_complete_lock_instr_emulation to resolve these issues. Tracked-On: #6502 Signed-off-by: Yifan Liu <yifan1.liu@intel.com> Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
124 lines
2.6 KiB
C
124 lines
2.6 KiB
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 ARCH_X86_GUEST_VIRQ_H
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#define ARCH_X86_GUEST_VIRQ_H
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struct acrn_vcpu;
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struct acrn_vm;
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/**
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* @brief virtual IRQ
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*
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* @addtogroup acrn_virq ACRN vIRQ
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* @{
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*/
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/**
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* @brief Queue exception to guest.
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*
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* This exception may be injected immediately or later,
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* depends on the exeception class.
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*
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* @param[in] vcpu Pointer to vCPU.
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* @param[in] vector_arg Vector of the exeception.
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* @param[in] err_code_arg Error Code to be injected.
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*
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* @retval 0 on success
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* @retval -EINVAL on error that vector is invalid.
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*
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* @pre vcpu != NULL
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*/
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int32_t vcpu_queue_exception(struct acrn_vcpu *vcpu, uint32_t vector_arg, uint32_t err_code_arg);
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/**
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* @brief Inject external interrupt to guest.
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*
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* @param[in] vcpu Pointer to vCPU.
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*
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* @return None
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*
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* @pre vcpu != NULL
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*/
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void vcpu_inject_extint(struct acrn_vcpu *vcpu);
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/**
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* @brief Inject NMI to guest.
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*
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* @param[in] vcpu Pointer to vCPU.
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*
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* @return None
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*
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* @pre vcpu != NULL
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*/
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void vcpu_inject_nmi(struct acrn_vcpu *vcpu);
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/**
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* @brief Inject general protection exeception(GP) to guest.
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*
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* @param[in] vcpu Pointer to vCPU.
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* @param[in] err_code Error Code to be injected.
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*
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* @return None
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*
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* @pre vcpu != NULL
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*/
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void vcpu_inject_gp(struct acrn_vcpu *vcpu, uint32_t err_code);
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/**
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* @brief Inject page fault exeception(PF) to guest.
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*
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* @param[in] vcpu Pointer to vCPU.
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* @param[in] addr Address that result in PF.
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* @param[in] err_code Error Code to be injected.
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*
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* @return None
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*
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* @pre vcpu != NULL
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*/
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void vcpu_inject_pf(struct acrn_vcpu *vcpu, uint64_t addr, uint32_t err_code);
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/**
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* @brief Inject invalid opcode exeception(UD) to guest.
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*
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* @param[in] vcpu Pointer to vCPU.
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*
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* @return None
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*
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* @pre vcpu != NULL
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*/
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void vcpu_inject_ud(struct acrn_vcpu *vcpu);
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/**
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* @brief Inject stack fault exeception(SS) to guest.
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*
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* @param[in] vcpu Pointer to vCPU.
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*
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* @return None
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*
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* @pre vcpu != NULL
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*/
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void vcpu_inject_ss(struct acrn_vcpu *vcpu);
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void vcpu_make_request(struct acrn_vcpu *vcpu, uint16_t eventid);
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bool vcpu_try_cancel_request(struct acrn_vcpu *vcpu, uint16_t eventid);
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/*
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* @pre vcpu != NULL
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*/
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int32_t exception_vmexit_handler(struct acrn_vcpu *vcpu);
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int32_t nmi_window_vmexit_handler(struct acrn_vcpu *vcpu);
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int32_t interrupt_window_vmexit_handler(struct acrn_vcpu *vcpu);
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int32_t external_interrupt_vmexit_handler(struct acrn_vcpu *vcpu);
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int32_t acrn_handle_pending_request(struct acrn_vcpu *vcpu);
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/**
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* @}
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*/
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/* End of acrn_virq */
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#endif /* ARCH_X86_GUEST_VIRQ_H */
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