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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ACRN_HSM_DRV_H
#define __ACRN_HSM_DRV_H
#include <linux/acrn.h>
#include <linux/dev_printk.h>
#include <linux/miscdevice.h>
#include <linux/types.h>
#include "hypercall.h"
extern struct miscdevice acrn_dev;
#define ACRN_MEM_MAPPING_MAX 256
#define ACRN_MEM_REGION_ADD 0
#define ACRN_MEM_REGION_DEL 2
/**
* struct vm_memory_region_op - Hypervisor memory operation
* @type: Operation type (ACRN_MEM_REGION_*)
* @attr: Memory attribute (ACRN_MEM_TYPE_* | ACRN_MEM_ACCESS_*)
* @user_vm_pa: Physical address of User VM to be mapped.
* @service_vm_pa: Physical address of Service VM to be mapped.
* @size: Size of this region.
*
* Structure containing needed information that is provided to ACRN Hypervisor
* to manage the EPT mappings of a single memory region of the User VM. Several
* &struct vm_memory_region_op can be batched to ACRN Hypervisor, see &struct
* vm_memory_region_batch.
*/
struct vm_memory_region_op {
u32 type;
u32 attr;
u64 user_vm_pa;
u64 service_vm_pa;
u64 size;
};
/**
* struct vm_memory_region_batch - A batch of vm_memory_region_op.
* @vmid: A User VM ID.
* @reserved: Reserved.
* @regions_num: The number of vm_memory_region_op.
* @regions_gpa: Physical address of a vm_memory_region_op array.
*
* HC_VM_SET_MEMORY_REGIONS uses this structure to manage EPT mappings of
* multiple memory regions of a User VM. A &struct vm_memory_region_batch
* contains multiple &struct vm_memory_region_op for batch processing in the
* ACRN Hypervisor.
*/
struct vm_memory_region_batch {
u16 vmid;
u16 reserved[3];
u32 regions_num;
u64 regions_gpa;
};
/**
* struct vm_memory_mapping - Memory map between a User VM and the Service VM
* @pages: Pages in Service VM kernel.
* @npages: Number of pages.
* @service_vm_va: Virtual address in Service VM kernel.
* @user_vm_pa: Physical address in User VM.
* @size: Size of this memory region.
*
* HSM maintains memory mappings between a User VM GPA and the Service VM
* kernel VA for accelerating the User VM GPA translation.
*/
struct vm_memory_mapping {
struct page **pages;
int npages;
void *service_vm_va;
u64 user_vm_pa;
size_t size;
};
#define ACRN_INVALID_VMID (0xffffU)
#define ACRN_VM_FLAG_DESTROYED 0U
/**
* struct acrn_vm - Properties of ACRN User VM.
* @list: Entry within global list of all VMs.
* @vmid: User VM ID.
* @vcpu_num: Number of virtual CPUs in the VM.
* @flags: Flags (ACRN_VM_FLAG_*) of the VM. This is VM
* flag management in HSM which is different
* from the &acrn_vm_creation.vm_flag.
* @regions_mapping_lock: Lock to protect &acrn_vm.regions_mapping and
* &acrn_vm.regions_mapping_count.
* @regions_mapping: Memory mappings of this VM.
* @regions_mapping_count: Number of memory mapping of this VM.
*/
struct acrn_vm {
struct list_head list;
u16 vmid;
int vcpu_num;
unsigned long flags;
struct mutex regions_mapping_lock;
struct vm_memory_mapping regions_mapping[ACRN_MEM_MAPPING_MAX];
int regions_mapping_count;
};
struct acrn_vm *acrn_vm_create(struct acrn_vm *vm,
struct acrn_vm_creation *vm_param);
int acrn_vm_destroy(struct acrn_vm *vm);
int acrn_mm_region_add(struct acrn_vm *vm, u64 user_gpa, u64 service_gpa,
u64 size, u32 mem_type, u32 mem_access_right);
int acrn_mm_region_del(struct acrn_vm *vm, u64 user_gpa, u64 size);
int acrn_vm_memseg_map(struct acrn_vm *vm, struct acrn_vm_memmap *memmap);
int acrn_vm_memseg_unmap(struct acrn_vm *vm, struct acrn_vm_memmap *memmap);
int acrn_vm_ram_map(struct acrn_vm *vm, struct acrn_vm_memmap *memmap);
void acrn_vm_all_ram_unmap(struct acrn_vm *vm);
#endif /* __ACRN_HSM_DRV_H */
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