539 lines
13 KiB
C
539 lines
13 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* ACRN Hypervisor Service Module (HSM)
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*
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* Copyright (C) 2020 Intel Corporation. All rights reserved.
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*
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* Authors:
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* Fengwei Yin <fengwei.yin@intel.com>
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* Yakui Zhao <yakui.zhao@intel.com>
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*/
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#include <linux/cpu.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <asm/acrn.h>
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#include <asm/hypervisor.h>
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#include "acrn_drv.h"
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/*
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* When /dev/acrn_hsm is opened, a 'struct acrn_vm' object is created to
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* represent a VM instance and continues to be associated with the opened file
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* descriptor. All ioctl operations on this file descriptor will be targeted to
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* the VM instance. Release of this file descriptor will destroy the object.
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*/
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static int acrn_dev_open(struct inode *inode, struct file *filp)
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{
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struct acrn_vm *vm;
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vm = kzalloc(sizeof(*vm), GFP_KERNEL);
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if (!vm)
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return -ENOMEM;
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vm->vmid = ACRN_INVALID_VMID;
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filp->private_data = vm;
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return 0;
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}
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static int pmcmd_ioctl(u64 cmd, void __user *uptr)
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{
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struct acrn_pstate_data *px_data;
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struct acrn_cstate_data *cx_data;
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u64 *pm_info;
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int ret = 0;
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switch (cmd & PMCMD_TYPE_MASK) {
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case ACRN_PMCMD_GET_PX_CNT:
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case ACRN_PMCMD_GET_CX_CNT:
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pm_info = kmalloc(sizeof(u64), GFP_KERNEL);
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if (!pm_info)
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return -ENOMEM;
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ret = hcall_get_cpu_state(cmd, virt_to_phys(pm_info));
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if (ret < 0) {
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kfree(pm_info);
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break;
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}
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if (copy_to_user(uptr, pm_info, sizeof(u64)))
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ret = -EFAULT;
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kfree(pm_info);
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break;
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case ACRN_PMCMD_GET_PX_DATA:
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px_data = kmalloc(sizeof(*px_data), GFP_KERNEL);
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if (!px_data)
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return -ENOMEM;
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ret = hcall_get_cpu_state(cmd, virt_to_phys(px_data));
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if (ret < 0) {
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kfree(px_data);
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break;
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}
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if (copy_to_user(uptr, px_data, sizeof(*px_data)))
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ret = -EFAULT;
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kfree(px_data);
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break;
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case ACRN_PMCMD_GET_CX_DATA:
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cx_data = kmalloc(sizeof(*cx_data), GFP_KERNEL);
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if (!cx_data)
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return -ENOMEM;
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ret = hcall_get_cpu_state(cmd, virt_to_phys(cx_data));
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if (ret < 0) {
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kfree(cx_data);
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break;
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}
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if (copy_to_user(uptr, cx_data, sizeof(*cx_data)))
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ret = -EFAULT;
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kfree(cx_data);
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break;
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default:
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break;
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}
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return ret;
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}
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/*
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* HSM relies on hypercall layer of the ACRN hypervisor to do the
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* sanity check against the input parameters.
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*/
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static long acrn_dev_ioctl(struct file *filp, unsigned int cmd,
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unsigned long ioctl_param)
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{
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struct acrn_vm *vm = filp->private_data;
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struct acrn_vm_creation *vm_param;
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struct acrn_vcpu_regs *cpu_regs;
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struct acrn_ioreq_notify notify;
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struct acrn_ptdev_irq *irq_info;
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struct acrn_ioeventfd ioeventfd;
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struct acrn_vm_memmap memmap;
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struct acrn_mmiodev *mmiodev;
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struct acrn_msi_entry *msi;
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struct acrn_pcidev *pcidev;
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struct acrn_irqfd irqfd;
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struct acrn_vdev *vdev;
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struct page *page;
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u64 cstate_cmd;
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int i, ret = 0;
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if (vm->vmid == ACRN_INVALID_VMID && cmd != ACRN_IOCTL_CREATE_VM) {
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dev_dbg(acrn_dev.this_device,
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"ioctl 0x%x: Invalid VM state!\n", cmd);
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return -EINVAL;
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}
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switch (cmd) {
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case ACRN_IOCTL_CREATE_VM:
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vm_param = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_vm_creation));
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if (IS_ERR(vm_param))
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return PTR_ERR(vm_param);
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if ((vm_param->reserved0 | vm_param->reserved1) != 0) {
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kfree(vm_param);
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return -EINVAL;
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}
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vm = acrn_vm_create(vm, vm_param);
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if (!vm) {
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ret = -EINVAL;
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kfree(vm_param);
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break;
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}
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if (copy_to_user((void __user *)ioctl_param, vm_param,
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sizeof(struct acrn_vm_creation))) {
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acrn_vm_destroy(vm);
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ret = -EFAULT;
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}
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kfree(vm_param);
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break;
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case ACRN_IOCTL_START_VM:
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ret = hcall_start_vm(vm->vmid);
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to start VM %u!\n", vm->vmid);
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break;
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case ACRN_IOCTL_PAUSE_VM:
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ret = hcall_pause_vm(vm->vmid);
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to pause VM %u!\n", vm->vmid);
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break;
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case ACRN_IOCTL_RESET_VM:
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ret = hcall_reset_vm(vm->vmid);
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to restart VM %u!\n", vm->vmid);
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break;
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case ACRN_IOCTL_DESTROY_VM:
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ret = acrn_vm_destroy(vm);
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break;
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case ACRN_IOCTL_SET_VCPU_REGS:
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cpu_regs = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_vcpu_regs));
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if (IS_ERR(cpu_regs))
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return PTR_ERR(cpu_regs);
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for (i = 0; i < ARRAY_SIZE(cpu_regs->reserved); i++)
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if (cpu_regs->reserved[i]) {
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kfree(cpu_regs);
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return -EINVAL;
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}
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for (i = 0; i < ARRAY_SIZE(cpu_regs->vcpu_regs.reserved_32); i++)
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if (cpu_regs->vcpu_regs.reserved_32[i]) {
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kfree(cpu_regs);
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return -EINVAL;
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}
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for (i = 0; i < ARRAY_SIZE(cpu_regs->vcpu_regs.reserved_64); i++)
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if (cpu_regs->vcpu_regs.reserved_64[i]) {
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kfree(cpu_regs);
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return -EINVAL;
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}
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for (i = 0; i < ARRAY_SIZE(cpu_regs->vcpu_regs.gdt.reserved); i++)
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if (cpu_regs->vcpu_regs.gdt.reserved[i] |
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cpu_regs->vcpu_regs.idt.reserved[i]) {
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kfree(cpu_regs);
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return -EINVAL;
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}
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ret = hcall_set_vcpu_regs(vm->vmid, virt_to_phys(cpu_regs));
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to set regs state of VM%u!\n",
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vm->vmid);
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kfree(cpu_regs);
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break;
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case ACRN_IOCTL_SET_MEMSEG:
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if (copy_from_user(&memmap, (void __user *)ioctl_param,
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sizeof(memmap)))
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return -EFAULT;
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ret = acrn_vm_memseg_map(vm, &memmap);
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break;
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case ACRN_IOCTL_UNSET_MEMSEG:
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if (copy_from_user(&memmap, (void __user *)ioctl_param,
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sizeof(memmap)))
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return -EFAULT;
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ret = acrn_vm_memseg_unmap(vm, &memmap);
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break;
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case ACRN_IOCTL_ASSIGN_MMIODEV:
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mmiodev = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_mmiodev));
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if (IS_ERR(mmiodev))
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return PTR_ERR(mmiodev);
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ret = hcall_assign_mmiodev(vm->vmid, virt_to_phys(mmiodev));
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to assign MMIO device!\n");
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kfree(mmiodev);
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break;
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case ACRN_IOCTL_DEASSIGN_MMIODEV:
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mmiodev = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_mmiodev));
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if (IS_ERR(mmiodev))
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return PTR_ERR(mmiodev);
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ret = hcall_deassign_mmiodev(vm->vmid, virt_to_phys(mmiodev));
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to deassign MMIO device!\n");
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kfree(mmiodev);
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break;
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case ACRN_IOCTL_ASSIGN_PCIDEV:
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pcidev = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_pcidev));
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if (IS_ERR(pcidev))
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return PTR_ERR(pcidev);
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ret = hcall_assign_pcidev(vm->vmid, virt_to_phys(pcidev));
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to assign pci device!\n");
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kfree(pcidev);
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break;
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case ACRN_IOCTL_DEASSIGN_PCIDEV:
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pcidev = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_pcidev));
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if (IS_ERR(pcidev))
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return PTR_ERR(pcidev);
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ret = hcall_deassign_pcidev(vm->vmid, virt_to_phys(pcidev));
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to deassign pci device!\n");
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kfree(pcidev);
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break;
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case ACRN_IOCTL_CREATE_VDEV:
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vdev = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_vdev));
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if (IS_ERR(vdev))
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return PTR_ERR(vdev);
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ret = hcall_create_vdev(vm->vmid, virt_to_phys(vdev));
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to create virtual device!\n");
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kfree(vdev);
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break;
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case ACRN_IOCTL_DESTROY_VDEV:
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vdev = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_vdev));
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if (IS_ERR(vdev))
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return PTR_ERR(vdev);
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ret = hcall_destroy_vdev(vm->vmid, virt_to_phys(vdev));
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to destroy virtual device!\n");
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kfree(vdev);
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break;
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case ACRN_IOCTL_SET_PTDEV_INTR:
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irq_info = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_ptdev_irq));
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if (IS_ERR(irq_info))
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return PTR_ERR(irq_info);
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ret = hcall_set_ptdev_intr(vm->vmid, virt_to_phys(irq_info));
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to configure intr for ptdev!\n");
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kfree(irq_info);
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break;
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case ACRN_IOCTL_RESET_PTDEV_INTR:
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irq_info = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_ptdev_irq));
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if (IS_ERR(irq_info))
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return PTR_ERR(irq_info);
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ret = hcall_reset_ptdev_intr(vm->vmid, virt_to_phys(irq_info));
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to reset intr for ptdev!\n");
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kfree(irq_info);
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break;
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case ACRN_IOCTL_SET_IRQLINE:
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ret = hcall_set_irqline(vm->vmid, ioctl_param);
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to set interrupt line!\n");
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break;
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case ACRN_IOCTL_INJECT_MSI:
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msi = memdup_user((void __user *)ioctl_param,
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sizeof(struct acrn_msi_entry));
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if (IS_ERR(msi))
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return PTR_ERR(msi);
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ret = hcall_inject_msi(vm->vmid, virt_to_phys(msi));
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if (ret < 0)
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dev_dbg(acrn_dev.this_device,
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"Failed to inject MSI!\n");
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kfree(msi);
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break;
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case ACRN_IOCTL_VM_INTR_MONITOR:
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ret = pin_user_pages_fast(ioctl_param, 1,
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FOLL_WRITE | FOLL_LONGTERM, &page);
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if (unlikely(ret != 1)) {
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dev_dbg(acrn_dev.this_device,
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"Failed to pin intr hdr buffer!\n");
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return -EFAULT;
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}
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ret = hcall_vm_intr_monitor(vm->vmid, page_to_phys(page));
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if (ret < 0) {
|
||
|
|
unpin_user_page(page);
|
||
|
|
dev_dbg(acrn_dev.this_device,
|
||
|
|
"Failed to monitor intr data!\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
if (vm->monitor_page)
|
||
|
|
unpin_user_page(vm->monitor_page);
|
||
|
|
vm->monitor_page = page;
|
||
|
|
break;
|
||
|
|
case ACRN_IOCTL_CREATE_IOREQ_CLIENT:
|
||
|
|
if (vm->default_client)
|
||
|
|
return -EEXIST;
|
||
|
|
if (!acrn_ioreq_client_create(vm, NULL, NULL, true, "acrndm"))
|
||
|
|
ret = -EINVAL;
|
||
|
|
break;
|
||
|
|
case ACRN_IOCTL_DESTROY_IOREQ_CLIENT:
|
||
|
|
if (vm->default_client)
|
||
|
|
acrn_ioreq_client_destroy(vm->default_client);
|
||
|
|
break;
|
||
|
|
case ACRN_IOCTL_ATTACH_IOREQ_CLIENT:
|
||
|
|
if (vm->default_client)
|
||
|
|
ret = acrn_ioreq_client_wait(vm->default_client);
|
||
|
|
else
|
||
|
|
ret = -ENODEV;
|
||
|
|
break;
|
||
|
|
case ACRN_IOCTL_NOTIFY_REQUEST_FINISH:
|
||
|
|
if (copy_from_user(¬ify, (void __user *)ioctl_param,
|
||
|
|
sizeof(struct acrn_ioreq_notify)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (notify.reserved != 0)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
ret = acrn_ioreq_request_default_complete(vm, notify.vcpu);
|
||
|
|
break;
|
||
|
|
case ACRN_IOCTL_CLEAR_VM_IOREQ:
|
||
|
|
acrn_ioreq_request_clear(vm);
|
||
|
|
break;
|
||
|
|
case ACRN_IOCTL_PM_GET_CPU_STATE:
|
||
|
|
if (copy_from_user(&cstate_cmd, (void __user *)ioctl_param,
|
||
|
|
sizeof(cstate_cmd)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
ret = pmcmd_ioctl(cstate_cmd, (void __user *)ioctl_param);
|
||
|
|
break;
|
||
|
|
case ACRN_IOCTL_IOEVENTFD:
|
||
|
|
if (copy_from_user(&ioeventfd, (void __user *)ioctl_param,
|
||
|
|
sizeof(ioeventfd)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (ioeventfd.reserved != 0)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
ret = acrn_ioeventfd_config(vm, &ioeventfd);
|
||
|
|
break;
|
||
|
|
case ACRN_IOCTL_IRQFD:
|
||
|
|
if (copy_from_user(&irqfd, (void __user *)ioctl_param,
|
||
|
|
sizeof(irqfd)))
|
||
|
|
return -EFAULT;
|
||
|
|
ret = acrn_irqfd_config(vm, &irqfd);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
dev_dbg(acrn_dev.this_device, "Unknown IOCTL 0x%x!\n", cmd);
|
||
|
|
ret = -ENOTTY;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int acrn_dev_release(struct inode *inode, struct file *filp)
|
||
|
|
{
|
||
|
|
struct acrn_vm *vm = filp->private_data;
|
||
|
|
|
||
|
|
acrn_vm_destroy(vm);
|
||
|
|
kfree(vm);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t remove_cpu_store(struct device *dev,
|
||
|
|
struct device_attribute *attr,
|
||
|
|
const char *buf, size_t count)
|
||
|
|
{
|
||
|
|
u64 cpu, lapicid;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (kstrtoull(buf, 0, &cpu) < 0)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (cpu >= num_possible_cpus() || cpu == 0 || !cpu_is_hotpluggable(cpu))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (cpu_online(cpu))
|
||
|
|
remove_cpu(cpu);
|
||
|
|
|
||
|
|
lapicid = cpu_data(cpu).apicid;
|
||
|
|
dev_dbg(dev, "Try to remove cpu %lld with lapicid %lld\n", cpu, lapicid);
|
||
|
|
ret = hcall_sos_remove_cpu(lapicid);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(dev, "Failed to remove cpu %lld!\n", cpu);
|
||
|
|
goto fail_remove;
|
||
|
|
}
|
||
|
|
|
||
|
|
return count;
|
||
|
|
|
||
|
|
fail_remove:
|
||
|
|
add_cpu(cpu);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
static DEVICE_ATTR_WO(remove_cpu);
|
||
|
|
|
||
|
|
static umode_t acrn_attr_visible(struct kobject *kobj, struct attribute *a, int n)
|
||
|
|
{
|
||
|
|
if (a == &dev_attr_remove_cpu.attr)
|
||
|
|
return IS_ENABLED(CONFIG_HOTPLUG_CPU) ? a->mode : 0;
|
||
|
|
|
||
|
|
return a->mode;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct attribute *acrn_attrs[] = {
|
||
|
|
&dev_attr_remove_cpu.attr,
|
||
|
|
NULL
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct attribute_group acrn_attr_group = {
|
||
|
|
.attrs = acrn_attrs,
|
||
|
|
.is_visible = acrn_attr_visible,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct attribute_group *acrn_attr_groups[] = {
|
||
|
|
&acrn_attr_group,
|
||
|
|
NULL
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct file_operations acrn_fops = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.open = acrn_dev_open,
|
||
|
|
.release = acrn_dev_release,
|
||
|
|
.unlocked_ioctl = acrn_dev_ioctl,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct miscdevice acrn_dev = {
|
||
|
|
.minor = MISC_DYNAMIC_MINOR,
|
||
|
|
.name = "acrn_hsm",
|
||
|
|
.fops = &acrn_fops,
|
||
|
|
.groups = acrn_attr_groups,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init hsm_init(void)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (x86_hyper_type != X86_HYPER_ACRN)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
if (!(cpuid_eax(ACRN_CPUID_FEATURES) & ACRN_FEATURE_PRIVILEGED_VM))
|
||
|
|
return -EPERM;
|
||
|
|
|
||
|
|
ret = misc_register(&acrn_dev);
|
||
|
|
if (ret) {
|
||
|
|
pr_err("Create misc dev failed!\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = acrn_ioreq_intr_setup();
|
||
|
|
if (ret) {
|
||
|
|
pr_err("Setup I/O request handler failed!\n");
|
||
|
|
misc_deregister(&acrn_dev);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit hsm_exit(void)
|
||
|
|
{
|
||
|
|
acrn_ioreq_intr_remove();
|
||
|
|
misc_deregister(&acrn_dev);
|
||
|
|
}
|
||
|
|
module_init(hsm_init);
|
||
|
|
module_exit(hsm_exit);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Intel Corporation");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_DESCRIPTION("ACRN Hypervisor Service Module (HSM)");
|