230 lines
7.6 KiB
C
230 lines
7.6 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ACRN_HSM_DRV_H
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#define __ACRN_HSM_DRV_H
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#include <linux/acrn.h>
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#include <linux/dev_printk.h>
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#include <linux/miscdevice.h>
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#include <linux/types.h>
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#include "hypercall.h"
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extern struct miscdevice acrn_dev;
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#define ACRN_NAME_LEN 16
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#define ACRN_MEM_MAPPING_MAX 256
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#define ACRN_MEM_REGION_ADD 0
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#define ACRN_MEM_REGION_DEL 2
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struct acrn_vm;
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struct acrn_ioreq_client;
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/**
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* struct vm_memory_region_op - Hypervisor memory operation
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* @type: Operation type (ACRN_MEM_REGION_*)
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* @attr: Memory attribute (ACRN_MEM_TYPE_* | ACRN_MEM_ACCESS_*)
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* @user_vm_pa: Physical address of User VM to be mapped.
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* @service_vm_pa: Physical address of Service VM to be mapped.
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* @size: Size of this region.
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*
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* Structure containing needed information that is provided to ACRN Hypervisor
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* to manage the EPT mappings of a single memory region of the User VM. Several
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* &struct vm_memory_region_op can be batched to ACRN Hypervisor, see &struct
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* vm_memory_region_batch.
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*/
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struct vm_memory_region_op {
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u32 type;
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u32 attr;
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u64 user_vm_pa;
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u64 service_vm_pa;
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u64 size;
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};
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/**
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* struct vm_memory_region_batch - A batch of vm_memory_region_op.
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* @vmid: A User VM ID.
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* @reserved: Reserved.
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* @regions_num: The number of vm_memory_region_op.
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* @regions_gpa: Physical address of a vm_memory_region_op array.
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* @regions_op: Flexible array of vm_memory_region_op.
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*
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* HC_VM_SET_MEMORY_REGIONS uses this structure to manage EPT mappings of
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* multiple memory regions of a User VM. A &struct vm_memory_region_batch
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* contains multiple &struct vm_memory_region_op for batch processing in the
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* ACRN Hypervisor.
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*/
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struct vm_memory_region_batch {
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u16 vmid;
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u16 reserved[3];
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u32 regions_num;
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u64 regions_gpa;
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struct vm_memory_region_op regions_op[];
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};
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/**
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* struct vm_memory_mapping - Memory map between a User VM and the Service VM
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* @pages: Pages in Service VM kernel.
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* @npages: Number of pages.
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* @service_vm_va: Virtual address in Service VM kernel.
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* @user_vm_pa: Physical address in User VM.
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* @size: Size of this memory region.
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*
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* HSM maintains memory mappings between a User VM GPA and the Service VM
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* kernel VA for accelerating the User VM GPA translation.
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*/
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struct vm_memory_mapping {
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struct page **pages;
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int npages;
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void *service_vm_va;
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u64 user_vm_pa;
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size_t size;
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};
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/**
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* struct acrn_ioreq_buffer - Data for setting the ioreq buffer of User VM
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* @ioreq_buf: The GPA of the IO request shared buffer of a VM
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*
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* The parameter for the HC_SET_IOREQ_BUFFER hypercall used to set up
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* the shared I/O request buffer between Service VM and ACRN hypervisor.
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*/
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struct acrn_ioreq_buffer {
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u64 ioreq_buf;
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};
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struct acrn_ioreq_range {
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struct list_head list;
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u32 type;
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u64 start;
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u64 end;
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};
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#define ACRN_IOREQ_CLIENT_DESTROYING 0U
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typedef int (*ioreq_handler_t)(struct acrn_ioreq_client *client,
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struct acrn_io_request *req);
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/**
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* struct acrn_ioreq_client - Structure of I/O client.
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* @name: Client name
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* @vm: The VM that the client belongs to
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* @list: List node for this acrn_ioreq_client
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* @is_default: If this client is the default one
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* @flags: Flags (ACRN_IOREQ_CLIENT_*)
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* @range_list: I/O ranges
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* @range_lock: Lock to protect range_list
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* @ioreqs_map: The pending I/O requests bitmap.
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* @handler: I/O requests handler of this client
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* @thread: The thread which executes the handler
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* @wq: The wait queue for the handler thread parking
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* @priv: Data for the thread
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*/
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struct acrn_ioreq_client {
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char name[ACRN_NAME_LEN];
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struct acrn_vm *vm;
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struct list_head list;
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bool is_default;
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unsigned long flags;
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struct list_head range_list;
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rwlock_t range_lock;
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DECLARE_BITMAP(ioreqs_map, ACRN_IO_REQUEST_MAX);
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ioreq_handler_t handler;
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struct task_struct *thread;
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wait_queue_head_t wq;
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void *priv;
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};
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#define ACRN_INVALID_VMID (0xffffU)
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#define ACRN_VM_FLAG_DESTROYED 0U
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#define ACRN_VM_FLAG_CLEARING_IOREQ 1U
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extern struct list_head acrn_vm_list;
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extern rwlock_t acrn_vm_list_lock;
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/**
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* struct acrn_vm - Properties of ACRN User VM.
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* @list: Entry within global list of all VMs.
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* @vmid: User VM ID.
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* @vcpu_num: Number of virtual CPUs in the VM.
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* @flags: Flags (ACRN_VM_FLAG_*) of the VM. This is VM
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* flag management in HSM which is different
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* from the &acrn_vm_creation.vm_flag.
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* @regions_mapping_lock: Lock to protect &acrn_vm.regions_mapping and
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* &acrn_vm.regions_mapping_count.
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* @regions_mapping: Memory mappings of this VM.
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* @regions_mapping_count: Number of memory mapping of this VM.
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* @ioreq_clients_lock: Lock to protect ioreq_clients and default_client
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* @ioreq_clients: The I/O request clients list of this VM
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* @default_client: The default I/O request client
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* @ioreq_buf: I/O request shared buffer
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* @ioreq_page: The page of the I/O request shared buffer
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* @pci_conf_addr: Address of a PCI configuration access emulation
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* @monitor_page: Page of interrupt statistics of User VM
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* @ioeventfds_lock: Lock to protect ioeventfds list
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* @ioeventfds: List to link all hsm_ioeventfd
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* @ioeventfd_client: I/O client for ioeventfds of the VM
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* @irqfds_lock: Lock to protect irqfds list
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* @irqfds: List to link all hsm_irqfd
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* @irqfd_wq: Workqueue for irqfd async shutdown
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*/
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struct acrn_vm {
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struct list_head list;
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u16 vmid;
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int vcpu_num;
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unsigned long flags;
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struct mutex regions_mapping_lock;
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struct vm_memory_mapping regions_mapping[ACRN_MEM_MAPPING_MAX];
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int regions_mapping_count;
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spinlock_t ioreq_clients_lock;
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struct list_head ioreq_clients;
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struct acrn_ioreq_client *default_client;
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struct acrn_io_request_buffer *ioreq_buf;
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struct page *ioreq_page;
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u32 pci_conf_addr;
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struct page *monitor_page;
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struct mutex ioeventfds_lock;
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struct list_head ioeventfds;
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struct acrn_ioreq_client *ioeventfd_client;
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struct mutex irqfds_lock;
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struct list_head irqfds;
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struct workqueue_struct *irqfd_wq;
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};
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struct acrn_vm *acrn_vm_create(struct acrn_vm *vm,
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struct acrn_vm_creation *vm_param);
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int acrn_vm_destroy(struct acrn_vm *vm);
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int acrn_mm_region_add(struct acrn_vm *vm, u64 user_gpa, u64 service_gpa,
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u64 size, u32 mem_type, u32 mem_access_right);
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int acrn_mm_region_del(struct acrn_vm *vm, u64 user_gpa, u64 size);
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int acrn_vm_memseg_map(struct acrn_vm *vm, struct acrn_vm_memmap *memmap);
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int acrn_vm_memseg_unmap(struct acrn_vm *vm, struct acrn_vm_memmap *memmap);
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int acrn_vm_ram_map(struct acrn_vm *vm, struct acrn_vm_memmap *memmap);
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void acrn_vm_all_ram_unmap(struct acrn_vm *vm);
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int acrn_ioreq_init(struct acrn_vm *vm, u64 buf_vma);
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void acrn_ioreq_deinit(struct acrn_vm *vm);
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int acrn_ioreq_intr_setup(void);
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void acrn_ioreq_intr_remove(void);
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void acrn_ioreq_request_clear(struct acrn_vm *vm);
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int acrn_ioreq_client_wait(struct acrn_ioreq_client *client);
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int acrn_ioreq_request_default_complete(struct acrn_vm *vm, u16 vcpu);
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struct acrn_ioreq_client *acrn_ioreq_client_create(struct acrn_vm *vm,
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ioreq_handler_t handler,
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void *data, bool is_default,
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const char *name);
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void acrn_ioreq_client_destroy(struct acrn_ioreq_client *client);
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int acrn_ioreq_range_add(struct acrn_ioreq_client *client,
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u32 type, u64 start, u64 end);
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void acrn_ioreq_range_del(struct acrn_ioreq_client *client,
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u32 type, u64 start, u64 end);
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int acrn_msi_inject(struct acrn_vm *vm, u64 msi_addr, u64 msi_data);
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int acrn_ioeventfd_init(struct acrn_vm *vm);
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int acrn_ioeventfd_config(struct acrn_vm *vm, struct acrn_ioeventfd *args);
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void acrn_ioeventfd_deinit(struct acrn_vm *vm);
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int acrn_irqfd_init(struct acrn_vm *vm);
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int acrn_irqfd_config(struct acrn_vm *vm, struct acrn_irqfd *args);
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void acrn_irqfd_deinit(struct acrn_vm *vm);
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#endif /* __ACRN_HSM_DRV_H */
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