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https://github.com/projectacrn/acrn-hypervisor.git
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865ee2956e
Handle the PIO reset register that is defined in host ACPI: Parse host FADT table to get the host reset register info, and emulate it for Service OS: - return all '1' for guest reads because the read behavior is not defined in ACPI. - ignore guest writes with the reset value to stop it from resetting host; if guest writes other values, passthru it to hardware in case the reset register supports other functionalities. Tracked-On: #2700 Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com> Signed-off-by: Zide Chen <zide.chen@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
/*
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* Copyright (C) 2019 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 IO_EMUL_H
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#define IO_EMUL_H
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#include <types.h>
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/* Define emulated port IO index */
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#define PIC_MASTER_PIO_IDX 0U
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#define PIC_SLAVE_PIO_IDX (PIC_MASTER_PIO_IDX + 1U)
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#define PIC_ELC_PIO_IDX (PIC_SLAVE_PIO_IDX + 1U)
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#define PCI_CFGADDR_PIO_IDX (PIC_ELC_PIO_IDX + 1U)
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#define PCI_CFGDATA_PIO_IDX (PCI_CFGADDR_PIO_IDX + 1U)
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/* When MAX_VUART_NUM_PER_VM is larger than 2, UART_PIO_IDXn should also be added here */
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#define UART_PIO_IDX0 (PCI_CFGDATA_PIO_IDX + 1U)
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#define UART_PIO_IDX1 (UART_PIO_IDX0 + 1U)
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#define PM1A_EVT_PIO_IDX (UART_PIO_IDX1 + 1U)
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#define PM1A_CNT_PIO_IDX (PM1A_EVT_PIO_IDX + 1U)
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#define PM1B_EVT_PIO_IDX (PM1A_CNT_PIO_IDX + 1U)
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#define PM1B_CNT_PIO_IDX (PM1B_EVT_PIO_IDX + 1U)
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#define RTC_PIO_IDX (PM1B_CNT_PIO_IDX + 1U)
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#define VIRTUAL_PM1A_CNT_PIO_IDX (RTC_PIO_IDX + 1U)
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#define KB_PIO_IDX (VIRTUAL_PM1A_CNT_PIO_IDX + 1U)
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#define CF9_PIO_IDX (KB_PIO_IDX + 1U)
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#define PIO_RESET_REG_IDX (CF9_PIO_IDX + 1U)
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#define EMUL_PIO_IDX_MAX (PIO_RESET_REG_IDX + 1U)
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/**
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* @brief The handler of VM exits on I/O instructions
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*
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* @param vcpu The virtual CPU which triggers the VM exit on I/O instruction
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*/
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int32_t pio_instr_vmexit_handler(struct acrn_vcpu *vcpu);
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/**
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* @brief EPT violation handling
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*
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* @param[in] vcpu the pointer that points to vcpu data structure
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*
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* @retval -EINVAL fail to handle the EPT violation
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* @retval 0 Success to handle the EPT violation
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*/
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int32_t ept_violation_vmexit_handler(struct acrn_vcpu *vcpu);
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/**
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* @brief General complete-work for port I/O emulation
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*
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* @pre io_req->io_type == REQ_PORTIO
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*
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* @remark This function must be called when \p io_req is completed, after
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* either a previous call to emulate_io() returning 0 or the corresponding VHM
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* request having transferred to the COMPLETE state.
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*/
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void emulate_pio_complete(struct acrn_vcpu *vcpu, const struct io_request *io_req);
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/**
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* @brief Allow a VM to access a port I/O range
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*
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* This API enables direct access from the given \p vm to the port I/O space
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* starting from \p port_address to \p port_address + \p nbytes - 1.
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*
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* @param vm The VM whose port I/O access permissions is to be changed
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* @param port_address The start address of the port I/O range
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* @param nbytes The size of the range, in bytes
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*/
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void allow_guest_pio_access(struct acrn_vm *vm, uint16_t port_address, uint32_t nbytes);
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/**
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* @brief Allow a VM to access a port I/O range
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*
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* This API enables direct access from the given \p vm to the port I/O space
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* starting from \p port_address to \p port_address + \p nbytes - 1.
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*
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* @param vm The VM whose port I/O access permissions is to be changed
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* @param port_address The start address of the port I/O range
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* @param nbytes The size of the range, in bytes
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*/
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void deny_guest_pio_access(struct acrn_vm *vm, uint16_t port_address, uint32_t nbytes);
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/**
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* @brief Fire VHM interrupt to SOS
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*
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* @return None
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*/
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void arch_fire_vhm_interrupt(void);
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#endif /* IO_EMUL_H */
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