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-rw-r--r--drivers/virt/acrn/Makefile2
-rw-r--r--drivers/virt/acrn/acrn_drv.h21
-rw-r--r--drivers/virt/acrn/hsm.c76
-rw-r--r--drivers/virt/acrn/hypercall.h78
-rw-r--r--drivers/virt/acrn/vm.c68
5 files changed, 241 insertions, 4 deletions
diff --git a/drivers/virt/acrn/Makefile b/drivers/virt/acrn/Makefile
index 6920ed798aaf..cf8b4ed5e74e 100644
--- a/drivers/virt/acrn/Makefile
+++ b/drivers/virt/acrn/Makefile
@@ -1,3 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_ACRN_HSM) := acrn.o
-acrn-y := hsm.o
+acrn-y := hsm.o vm.o
diff --git a/drivers/virt/acrn/acrn_drv.h b/drivers/virt/acrn/acrn_drv.h
index 29eedd696327..e5aba86cad8c 100644
--- a/drivers/virt/acrn/acrn_drv.h
+++ b/drivers/virt/acrn/acrn_drv.h
@@ -3,16 +3,35 @@
#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_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.
*/
struct acrn_vm {
- u16 vmid;
+ struct list_head list;
+ u16 vmid;
+ int vcpu_num;
+ unsigned long flags;
};
+struct acrn_vm *acrn_vm_create(struct acrn_vm *vm,
+ struct acrn_vm_creation *vm_param);
+int acrn_vm_destroy(struct acrn_vm *vm);
+
#endif /* __ACRN_HSM_DRV_H */
diff --git a/drivers/virt/acrn/hsm.c b/drivers/virt/acrn/hsm.c
index a8dcb250649d..5fd933471683 100644
--- a/drivers/virt/acrn/hsm.c
+++ b/drivers/virt/acrn/hsm.c
@@ -9,7 +9,6 @@
* Yakui Zhao <yakui.zhao@intel.com>
*/
-#include <linux/miscdevice.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/slab.h>
@@ -38,10 +37,82 @@ static int acrn_dev_open(struct inode *inode, struct file *filp)
return 0;
}
+/*
+ * HSM relies on hypercall layer of the ACRN hypervisor to do the
+ * sanity check against the input parameters.
+ */
+static long acrn_dev_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long ioctl_param)
+{
+ struct acrn_vm *vm = filp->private_data;
+ struct acrn_vm_creation *vm_param;
+ int ret = 0;
+
+ if (vm->vmid == ACRN_INVALID_VMID && cmd != ACRN_IOCTL_CREATE_VM) {
+ dev_dbg(acrn_dev.this_device,
+ "ioctl 0x%x: Invalid VM state!\n", cmd);
+ return -EINVAL;
+ }
+
+ switch (cmd) {
+ case ACRN_IOCTL_CREATE_VM:
+ vm_param = memdup_user((void __user *)ioctl_param,
+ sizeof(struct acrn_vm_creation));
+ if (IS_ERR(vm_param))
+ return PTR_ERR(vm_param);
+
+ if ((vm_param->reserved0 | vm_param->reserved1) != 0)
+ return -EINVAL;
+
+ vm = acrn_vm_create(vm, vm_param);
+ if (!vm) {
+ ret = -EINVAL;
+ kfree(vm_param);
+ break;
+ }
+
+ if (copy_to_user((void __user *)ioctl_param, vm_param,
+ sizeof(struct acrn_vm_creation))) {
+ acrn_vm_destroy(vm);
+ ret = -EFAULT;
+ }
+
+ kfree(vm_param);
+ break;
+ case ACRN_IOCTL_START_VM:
+ ret = hcall_start_vm(vm->vmid);
+ if (ret < 0)
+ dev_dbg(acrn_dev.this_device,
+ "Failed to start VM %u!\n", vm->vmid);
+ break;
+ case ACRN_IOCTL_PAUSE_VM:
+ ret = hcall_pause_vm(vm->vmid);
+ if (ret < 0)
+ dev_dbg(acrn_dev.this_device,
+ "Failed to pause VM %u!\n", vm->vmid);
+ break;
+ case ACRN_IOCTL_RESET_VM:
+ ret = hcall_reset_vm(vm->vmid);
+ if (ret < 0)
+ dev_dbg(acrn_dev.this_device,
+ "Failed to restart VM %u!\n", vm->vmid);
+ break;
+ case ACRN_IOCTL_DESTROY_VM:
+ ret = acrn_vm_destroy(vm);
+ 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;
}
@@ -50,9 +121,10 @@ static const struct file_operations acrn_fops = {
.owner = THIS_MODULE,
.open = acrn_dev_open,
.release = acrn_dev_release,
+ .unlocked_ioctl = acrn_dev_ioctl,
};
-static struct miscdevice acrn_dev = {
+struct miscdevice acrn_dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = "acrn_hsm",
.fops = &acrn_fops,
diff --git a/drivers/virt/acrn/hypercall.h b/drivers/virt/acrn/hypercall.h
new file mode 100644
index 000000000000..426b66cadb1f
--- /dev/null
+++ b/drivers/virt/acrn/hypercall.h
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * ACRN HSM: hypercalls of ACRN Hypervisor
+ */
+#ifndef __ACRN_HSM_HYPERCALL_H
+#define __ACRN_HSM_HYPERCALL_H
+#include <asm/acrn.h>
+
+/*
+ * Hypercall IDs of the ACRN Hypervisor
+ */
+#define _HC_ID(x, y) (((x) << 24) | (y))
+
+#define HC_ID 0x80UL
+
+#define HC_ID_VM_BASE 0x10UL
+#define HC_CREATE_VM _HC_ID(HC_ID, HC_ID_VM_BASE + 0x00)
+#define HC_DESTROY_VM _HC_ID(HC_ID, HC_ID_VM_BASE + 0x01)
+#define HC_START_VM _HC_ID(HC_ID, HC_ID_VM_BASE + 0x02)
+#define HC_PAUSE_VM _HC_ID(HC_ID, HC_ID_VM_BASE + 0x03)
+#define HC_RESET_VM _HC_ID(HC_ID, HC_ID_VM_BASE + 0x05)
+
+/**
+ * hcall_create_vm() - Create a User VM
+ * @vminfo: Service VM GPA of info of User VM creation
+ *
+ * Return: 0 on success, <0 on failure
+ */
+static inline long hcall_create_vm(u64 vminfo)
+{
+ return acrn_hypercall1(HC_CREATE_VM, vminfo);
+}
+
+/**
+ * hcall_start_vm() - Start a User VM
+ * @vmid: User VM ID
+ *
+ * Return: 0 on success, <0 on failure
+ */
+static inline long hcall_start_vm(u64 vmid)
+{
+ return acrn_hypercall1(HC_START_VM, vmid);
+}
+
+/**
+ * hcall_pause_vm() - Pause a User VM
+ * @vmid: User VM ID
+ *
+ * Return: 0 on success, <0 on failure
+ */
+static inline long hcall_pause_vm(u64 vmid)
+{
+ return acrn_hypercall1(HC_PAUSE_VM, vmid);
+}
+
+/**
+ * hcall_destroy_vm() - Destroy a User VM
+ * @vmid: User VM ID
+ *
+ * Return: 0 on success, <0 on failure
+ */
+static inline long hcall_destroy_vm(u64 vmid)
+{
+ return acrn_hypercall1(HC_DESTROY_VM, vmid);
+}
+
+/**
+ * hcall_reset_vm() - Reset a User VM
+ * @vmid: User VM ID
+ *
+ * Return: 0 on success, <0 on failure
+ */
+static inline long hcall_reset_vm(u64 vmid)
+{
+ return acrn_hypercall1(HC_RESET_VM, vmid);
+}
+
+#endif /* __ACRN_HSM_HYPERCALL_H */
diff --git a/drivers/virt/acrn/vm.c b/drivers/virt/acrn/vm.c
new file mode 100644
index 000000000000..3f667ac8ac1e
--- /dev/null
+++ b/drivers/virt/acrn/vm.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ACRN_HSM: Virtual Machine management
+ *
+ * Copyright (C) 2020 Intel Corporation. All rights reserved.
+ *
+ * Authors:
+ * Jason Chen CJ <jason.cj.chen@intel.com>
+ * Yakui Zhao <yakui.zhao@intel.com>
+ */
+#include <linux/io.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+
+#include "acrn_drv.h"
+
+/* List of VMs */
+static LIST_HEAD(acrn_vm_list);
+/* To protect acrn_vm_list */
+static DEFINE_MUTEX(acrn_vm_list_lock);
+
+struct acrn_vm *acrn_vm_create(struct acrn_vm *vm,
+ struct acrn_vm_creation *vm_param)
+{
+ int ret;
+
+ ret = hcall_create_vm(virt_to_phys(vm_param));
+ if (ret < 0 || vm_param->vmid == ACRN_INVALID_VMID) {
+ dev_err(acrn_dev.this_device,
+ "Failed to create VM! Error: %d\n", ret);
+ return NULL;
+ }
+
+ vm->vmid = vm_param->vmid;
+ vm->vcpu_num = vm_param->vcpu_num;
+
+ mutex_lock(&acrn_vm_list_lock);
+ list_add(&vm->list, &acrn_vm_list);
+ mutex_unlock(&acrn_vm_list_lock);
+
+ dev_dbg(acrn_dev.this_device, "VM %u created.\n", vm->vmid);
+ return vm;
+}
+
+int acrn_vm_destroy(struct acrn_vm *vm)
+{
+ int ret;
+
+ if (vm->vmid == ACRN_INVALID_VMID ||
+ test_and_set_bit(ACRN_VM_FLAG_DESTROYED, &vm->flags))
+ return 0;
+
+ /* Remove from global VM list */
+ mutex_lock(&acrn_vm_list_lock);
+ list_del_init(&vm->list);
+ mutex_unlock(&acrn_vm_list_lock);
+
+ ret = hcall_destroy_vm(vm->vmid);
+ if (ret < 0) {
+ dev_err(acrn_dev.this_device,
+ "Failed to destroy VM %u\n", vm->vmid);
+ clear_bit(ACRN_VM_FLAG_DESTROYED, &vm->flags);
+ return ret;
+ }
+ dev_dbg(acrn_dev.this_device, "VM %u destroyed.\n", vm->vmid);
+ vm->vmid = ACRN_INVALID_VMID;
+ return 0;
+}
generated by cgit (git 2.34.1) at 2024-06-07 00:47:23 +0000