blob: 9bc616f9376235923b67603fd75fa904503bfe34 [file] [log] [blame]
/*
* Copyright 2018 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "hf/vm.h"
#include "hf/api.h"
#include "hf/cpu.h"
#include "hf/std.h"
#include "vmapi/hf/call.h"
static struct vm vms[MAX_VMS];
static uint32_t vm_count;
bool vm_init(uint32_t vcpu_count, struct mpool *ppool, struct vm **new_vm)
{
uint32_t i;
struct vm *vm;
if (vm_count >= MAX_VMS) {
return false;
}
vm = &vms[vm_count];
memset(vm, 0, sizeof(*vm));
list_init(&vm->mailbox.waiter_list);
list_init(&vm->mailbox.ready_list);
sl_init(&vm->lock);
vm->id = vm_count;
vm->vcpu_count = vcpu_count;
vm->mailbox.state = mailbox_state_empty;
if (!mm_vm_init(&vm->ptable, ppool)) {
return false;
}
/* Initialise waiter entries. */
for (i = 0; i < MAX_VMS; i++) {
vm->wentry[i].waiting_vm = vm;
list_init(&vm->wentry[i].wait_links);
list_init(&vm->wentry[i].ready_links);
}
/* Do basic initialization of vcpus. */
for (i = 0; i < vcpu_count; i++) {
vcpu_init(&vm->vcpus[i], vm);
}
++vm_count;
*new_vm = vm;
return true;
}
uint32_t vm_get_count(void)
{
return vm_count;
}
struct vm *vm_get(uint32_t id)
{
/* Ensure the VM is initialized. */
if (id >= vm_count) {
return NULL;
}
return &vms[id];
}
/**
* Locks the given VM and updates `locked` to hold the newly locked vm.
*/
void vm_lock(struct vm *vm, struct vm_locked *locked)
{
sl_lock(&vm->lock);
locked->vm = vm;
}
/**
* Unlocks a VM previously locked with vm_lock, and updates `locked` to reflect
* the fact that the VM is no longer locked.
*/
void vm_unlock(struct vm_locked *locked)
{
sl_unlock(&locked->vm->lock);
locked->vm = NULL;
}
/* TODO: Shall we use index or id here? */
void vm_start_vcpu(struct vm *vm, size_t index, ipaddr_t entry, uintreg_t arg)
{
struct vcpu *vcpu = &vm->vcpus[index];
if (index < vm->vcpu_count) {
arch_regs_set_pc_arg(&vcpu->regs, entry, arg);
vcpu_on(vcpu);
}
}