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https://github.com/projectacrn/acrn-hypervisor.git
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ac6c5dce81
When the lapic is passthru, vpic and vioapic cannot be used anymore. In current code, user can still inject vpic interrupt to Guest OS, this is not allowed. This patch remove the vpic and vioapic initiate functions during creating VM with lapic passthru. But the APIs in vpic and vioapic are called in many places, for these APIs, follow the below principles: 1. For the APIs which will access uninitiated variables, and may case hypervisor hang, add @pre to make sure user should call them after vpic or vioapic is initiated. 2. For the APIs which only return some static value, do noting with them. 3. For the APIs which user will called to inject interrupt, such as vioapic_set_irqline_lock or vpic_set_irqline, add condition in these APIs to make sure it only inject interrupt when vpic or vioapic is initiated. This change is to make sure the vuart or hypercall need not to care whether lapic is passthru or the vpic and vioapic is initiated or not. Tracked-On: #3227 Signed-off-by: Conghui Chen <conghui.chen@intel.com>
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/*-
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* Copyright (c) 2013 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com>
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* Copyright (c) 2013 Neel Natu <neel@freebsd.org>
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* Copyright (c) 2017 Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef VIOAPIC_H
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#define VIOAPIC_H
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/**
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* @file vioapic.h
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*
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* @brief public APIs for virtual I/O APIC
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*/
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#include <apicreg.h>
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#include <util.h>
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#define VIOAPIC_BASE 0xFEC00000UL
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#define VIOAPIC_SIZE 4096UL
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#define VIOAPIC_MAX_PIN 256U
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#define REDIR_ENTRIES_HW 120U /* SOS align with native ioapic */
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#define STATE_BITMAP_SIZE INT_DIV_ROUNDUP(REDIR_ENTRIES_HW, 64U)
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#define IOAPIC_RTE_LOW_INTVEC ((uint32_t)IOAPIC_RTE_INTVEC)
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struct acrn_vioapic {
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struct acrn_vm *vm;
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spinlock_t mtx;
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uint32_t id;
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bool ready;
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uint32_t ioregsel;
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union ioapic_rte rtbl[REDIR_ENTRIES_HW];
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/* pin_state status bitmap: 1 - high, 0 - low */
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uint64_t pin_state[STATE_BITMAP_SIZE];
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struct ptirq_remapping_info *vpin_to_pt_entry[VIOAPIC_MAX_PIN];
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};
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void vioapic_init(struct acrn_vm *vm);
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void vioapic_reset(struct acrn_vm *vm);
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/**
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* @brief virtual I/O APIC
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*
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* @addtogroup acrn_vioapic ACRN vIOAPIC
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* @{
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*/
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/**
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* @brief Set vIOAPIC IRQ line status.
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*
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* @param[in] vm Pointer to target VM
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* @param[in] irqline Target IRQ number
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* @param[in] operation Action options: GSI_SET_HIGH/GSI_SET_LOW/
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* GSI_RAISING_PULSE/GSI_FALLING_PULSE
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*
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* @pre irqline < vioapic_pincount(vm)
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*
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* @return None
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*/
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void vioapic_set_irqline_lock(const struct acrn_vm *vm, uint32_t irqline, uint32_t operation);
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/**
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* @brief Set vIOAPIC IRQ line status.
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*
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* Similar with vioapic_set_irqline_lock(),but would not make sure
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* operation be done with ioapic lock.
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*
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* @param[in] vm Pointer to target VM
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* @param[in] irqline Target IRQ number
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* @param[in] operation Action options: GSI_SET_HIGH/GSI_SET_LOW/
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* GSI_RAISING_PULSE/GSI_FALLING_PULSE
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*
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* @pre irqline < vioapic_pincount(vm)
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* @return None
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*/
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void vioapic_set_irqline_nolock(const struct acrn_vm *vm, uint32_t irqline, uint32_t operation);
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uint32_t vioapic_pincount(const struct acrn_vm *vm);
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void vioapic_process_eoi(struct acrn_vm *vm, uint32_t vector);
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void vioapic_get_rte(struct acrn_vm *vm, uint32_t pin, union ioapic_rte *rte);
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int32_t vioapic_mmio_access_handler(struct io_request *io_req, void *handler_private_data);
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/**
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* @}
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*/
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/* End of acrn_vioapic */
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#endif /* VIOAPIC_H */
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