v4.19.13 snapshot.
diff --git a/drivers/virt/Kconfig b/drivers/virt/Kconfig
new file mode 100644
index 0000000..8d9cdfb
--- /dev/null
+++ b/drivers/virt/Kconfig
@@ -0,0 +1,34 @@
+#
+# Virtualization support drivers
+#
+
+menuconfig VIRT_DRIVERS
+ bool "Virtualization drivers"
+ ---help---
+ Say Y here to get to see options for device drivers that support
+ virtualization environments.
+
+ If you say N, all options in this submenu will be skipped and disabled.
+
+if VIRT_DRIVERS
+
+config FSL_HV_MANAGER
+ tristate "Freescale hypervisor management driver"
+ depends on FSL_SOC
+ select EPAPR_PARAVIRT
+ help
+ The Freescale hypervisor management driver provides several services
+ to drivers and applications related to the Freescale hypervisor:
+
+ 1) An ioctl interface for querying and managing partitions.
+
+ 2) A file interface to reading incoming doorbells.
+
+ 3) An interrupt handler for shutting down the partition upon
+ receiving the shutdown doorbell from a manager partition.
+
+ 4) A kernel interface for receiving callbacks when a managed
+ partition shuts down.
+
+source "drivers/virt/vboxguest/Kconfig"
+endif
diff --git a/drivers/virt/Makefile b/drivers/virt/Makefile
new file mode 100644
index 0000000..d3f7b25
--- /dev/null
+++ b/drivers/virt/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for drivers that support virtualization
+#
+
+obj-$(CONFIG_FSL_HV_MANAGER) += fsl_hypervisor.o
+obj-y += vboxguest/
diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c
new file mode 100644
index 0000000..8ba726e
--- /dev/null
+++ b/drivers/virt/fsl_hypervisor.c
@@ -0,0 +1,933 @@
+/*
+ * Freescale Hypervisor Management Driver
+
+ * Copyright (C) 2008-2011 Freescale Semiconductor, Inc.
+ * Author: Timur Tabi <timur@freescale.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ *
+ * The Freescale hypervisor management driver provides several services to
+ * drivers and applications related to the Freescale hypervisor:
+ *
+ * 1. An ioctl interface for querying and managing partitions.
+ *
+ * 2. A file interface to reading incoming doorbells.
+ *
+ * 3. An interrupt handler for shutting down the partition upon receiving the
+ * shutdown doorbell from a manager partition.
+ *
+ * 4. A kernel interface for receiving callbacks when a managed partition
+ * shuts down.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/reboot.h>
+#include <linux/uaccess.h>
+#include <linux/notifier.h>
+#include <linux/interrupt.h>
+
+#include <linux/io.h>
+#include <asm/fsl_hcalls.h>
+
+#include <linux/fsl_hypervisor.h>
+
+static BLOCKING_NOTIFIER_HEAD(failover_subscribers);
+
+/*
+ * Ioctl interface for FSL_HV_IOCTL_PARTITION_RESTART
+ *
+ * Restart a running partition
+ */
+static long ioctl_restart(struct fsl_hv_ioctl_restart __user *p)
+{
+ struct fsl_hv_ioctl_restart param;
+
+ /* Get the parameters from the user */
+ if (copy_from_user(¶m, p, sizeof(struct fsl_hv_ioctl_restart)))
+ return -EFAULT;
+
+ param.ret = fh_partition_restart(param.partition);
+
+ if (copy_to_user(&p->ret, ¶m.ret, sizeof(__u32)))
+ return -EFAULT;
+
+ return 0;
+}
+
+/*
+ * Ioctl interface for FSL_HV_IOCTL_PARTITION_STATUS
+ *
+ * Query the status of a partition
+ */
+static long ioctl_status(struct fsl_hv_ioctl_status __user *p)
+{
+ struct fsl_hv_ioctl_status param;
+ u32 status;
+
+ /* Get the parameters from the user */
+ if (copy_from_user(¶m, p, sizeof(struct fsl_hv_ioctl_status)))
+ return -EFAULT;
+
+ param.ret = fh_partition_get_status(param.partition, &status);
+ if (!param.ret)
+ param.status = status;
+
+ if (copy_to_user(p, ¶m, sizeof(struct fsl_hv_ioctl_status)))
+ return -EFAULT;
+
+ return 0;
+}
+
+/*
+ * Ioctl interface for FSL_HV_IOCTL_PARTITION_START
+ *
+ * Start a stopped partition.
+ */
+static long ioctl_start(struct fsl_hv_ioctl_start __user *p)
+{
+ struct fsl_hv_ioctl_start param;
+
+ /* Get the parameters from the user */
+ if (copy_from_user(¶m, p, sizeof(struct fsl_hv_ioctl_start)))
+ return -EFAULT;
+
+ param.ret = fh_partition_start(param.partition, param.entry_point,
+ param.load);
+
+ if (copy_to_user(&p->ret, ¶m.ret, sizeof(__u32)))
+ return -EFAULT;
+
+ return 0;
+}
+
+/*
+ * Ioctl interface for FSL_HV_IOCTL_PARTITION_STOP
+ *
+ * Stop a running partition
+ */
+static long ioctl_stop(struct fsl_hv_ioctl_stop __user *p)
+{
+ struct fsl_hv_ioctl_stop param;
+
+ /* Get the parameters from the user */
+ if (copy_from_user(¶m, p, sizeof(struct fsl_hv_ioctl_stop)))
+ return -EFAULT;
+
+ param.ret = fh_partition_stop(param.partition);
+
+ if (copy_to_user(&p->ret, ¶m.ret, sizeof(__u32)))
+ return -EFAULT;
+
+ return 0;
+}
+
+/*
+ * Ioctl interface for FSL_HV_IOCTL_MEMCPY
+ *
+ * The FH_MEMCPY hypercall takes an array of address/address/size structures
+ * to represent the data being copied. As a convenience to the user, this
+ * ioctl takes a user-create buffer and a pointer to a guest physically
+ * contiguous buffer in the remote partition, and creates the
+ * address/address/size array for the hypercall.
+ */
+static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p)
+{
+ struct fsl_hv_ioctl_memcpy param;
+
+ struct page **pages = NULL;
+ void *sg_list_unaligned = NULL;
+ struct fh_sg_list *sg_list = NULL;
+
+ unsigned int num_pages;
+ unsigned long lb_offset; /* Offset within a page of the local buffer */
+
+ unsigned int i;
+ long ret = 0;
+ int num_pinned; /* return value from get_user_pages() */
+ phys_addr_t remote_paddr; /* The next address in the remote buffer */
+ uint32_t count; /* The number of bytes left to copy */
+
+ /* Get the parameters from the user */
+ if (copy_from_user(¶m, p, sizeof(struct fsl_hv_ioctl_memcpy)))
+ return -EFAULT;
+
+ /*
+ * One partition must be local, the other must be remote. In other
+ * words, if source and target are both -1, or are both not -1, then
+ * return an error.
+ */
+ if ((param.source == -1) == (param.target == -1))
+ return -EINVAL;
+
+ /*
+ * The array of pages returned by get_user_pages() covers only
+ * page-aligned memory. Since the user buffer is probably not
+ * page-aligned, we need to handle the discrepancy.
+ *
+ * We calculate the offset within a page of the S/G list, and make
+ * adjustments accordingly. This will result in a page list that looks
+ * like this:
+ *
+ * ---- <-- first page starts before the buffer
+ * | |
+ * |////|-> ----
+ * |////| | |
+ * ---- | |
+ * | |
+ * ---- | |
+ * |////| | |
+ * |////| | |
+ * |////| | |
+ * ---- | |
+ * | |
+ * ---- | |
+ * |////| | |
+ * |////| | |
+ * |////| | |
+ * ---- | |
+ * | |
+ * ---- | |
+ * |////| | |
+ * |////|-> ----
+ * | | <-- last page ends after the buffer
+ * ----
+ *
+ * The distance between the start of the first page and the start of the
+ * buffer is lb_offset. The hashed (///) areas are the parts of the
+ * page list that contain the actual buffer.
+ *
+ * The advantage of this approach is that the number of pages is
+ * equal to the number of entries in the S/G list that we give to the
+ * hypervisor.
+ */
+ lb_offset = param.local_vaddr & (PAGE_SIZE - 1);
+ num_pages = (param.count + lb_offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
+
+ /* Allocate the buffers we need */
+
+ /*
+ * 'pages' is an array of struct page pointers that's initialized by
+ * get_user_pages().
+ */
+ pages = kcalloc(num_pages, sizeof(struct page *), GFP_KERNEL);
+ if (!pages) {
+ pr_debug("fsl-hv: could not allocate page list\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * sg_list is the list of fh_sg_list objects that we pass to the
+ * hypervisor.
+ */
+ sg_list_unaligned = kmalloc(num_pages * sizeof(struct fh_sg_list) +
+ sizeof(struct fh_sg_list) - 1, GFP_KERNEL);
+ if (!sg_list_unaligned) {
+ pr_debug("fsl-hv: could not allocate S/G list\n");
+ ret = -ENOMEM;
+ goto exit;
+ }
+ sg_list = PTR_ALIGN(sg_list_unaligned, sizeof(struct fh_sg_list));
+
+ /* Get the physical addresses of the source buffer */
+ num_pinned = get_user_pages_fast(param.local_vaddr - lb_offset,
+ num_pages, param.source != -1, pages);
+
+ if (num_pinned != num_pages) {
+ /* get_user_pages() failed */
+ pr_debug("fsl-hv: could not lock source buffer\n");
+ ret = (num_pinned < 0) ? num_pinned : -EFAULT;
+ goto exit;
+ }
+
+ /*
+ * Build the fh_sg_list[] array. The first page is special
+ * because it's misaligned.
+ */
+ if (param.source == -1) {
+ sg_list[0].source = page_to_phys(pages[0]) + lb_offset;
+ sg_list[0].target = param.remote_paddr;
+ } else {
+ sg_list[0].source = param.remote_paddr;
+ sg_list[0].target = page_to_phys(pages[0]) + lb_offset;
+ }
+ sg_list[0].size = min_t(uint64_t, param.count, PAGE_SIZE - lb_offset);
+
+ remote_paddr = param.remote_paddr + sg_list[0].size;
+ count = param.count - sg_list[0].size;
+
+ for (i = 1; i < num_pages; i++) {
+ if (param.source == -1) {
+ /* local to remote */
+ sg_list[i].source = page_to_phys(pages[i]);
+ sg_list[i].target = remote_paddr;
+ } else {
+ /* remote to local */
+ sg_list[i].source = remote_paddr;
+ sg_list[i].target = page_to_phys(pages[i]);
+ }
+ sg_list[i].size = min_t(uint64_t, count, PAGE_SIZE);
+
+ remote_paddr += sg_list[i].size;
+ count -= sg_list[i].size;
+ }
+
+ param.ret = fh_partition_memcpy(param.source, param.target,
+ virt_to_phys(sg_list), num_pages);
+
+exit:
+ if (pages) {
+ for (i = 0; i < num_pages; i++)
+ if (pages[i])
+ put_page(pages[i]);
+ }
+
+ kfree(sg_list_unaligned);
+ kfree(pages);
+
+ if (!ret)
+ if (copy_to_user(&p->ret, ¶m.ret, sizeof(__u32)))
+ return -EFAULT;
+
+ return ret;
+}
+
+/*
+ * Ioctl interface for FSL_HV_IOCTL_DOORBELL
+ *
+ * Ring a doorbell
+ */
+static long ioctl_doorbell(struct fsl_hv_ioctl_doorbell __user *p)
+{
+ struct fsl_hv_ioctl_doorbell param;
+
+ /* Get the parameters from the user. */
+ if (copy_from_user(¶m, p, sizeof(struct fsl_hv_ioctl_doorbell)))
+ return -EFAULT;
+
+ param.ret = ev_doorbell_send(param.doorbell);
+
+ if (copy_to_user(&p->ret, ¶m.ret, sizeof(__u32)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static long ioctl_dtprop(struct fsl_hv_ioctl_prop __user *p, int set)
+{
+ struct fsl_hv_ioctl_prop param;
+ char __user *upath, *upropname;
+ void __user *upropval;
+ char *path = NULL, *propname = NULL;
+ void *propval = NULL;
+ int ret = 0;
+
+ /* Get the parameters from the user. */
+ if (copy_from_user(¶m, p, sizeof(struct fsl_hv_ioctl_prop)))
+ return -EFAULT;
+
+ upath = (char __user *)(uintptr_t)param.path;
+ upropname = (char __user *)(uintptr_t)param.propname;
+ upropval = (void __user *)(uintptr_t)param.propval;
+
+ path = strndup_user(upath, FH_DTPROP_MAX_PATHLEN);
+ if (IS_ERR(path)) {
+ ret = PTR_ERR(path);
+ goto out;
+ }
+
+ propname = strndup_user(upropname, FH_DTPROP_MAX_PATHLEN);
+ if (IS_ERR(propname)) {
+ ret = PTR_ERR(propname);
+ goto out;
+ }
+
+ if (param.proplen > FH_DTPROP_MAX_PROPLEN) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ propval = kmalloc(param.proplen, GFP_KERNEL);
+ if (!propval) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (set) {
+ if (copy_from_user(propval, upropval, param.proplen)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ param.ret = fh_partition_set_dtprop(param.handle,
+ virt_to_phys(path),
+ virt_to_phys(propname),
+ virt_to_phys(propval),
+ param.proplen);
+ } else {
+ param.ret = fh_partition_get_dtprop(param.handle,
+ virt_to_phys(path),
+ virt_to_phys(propname),
+ virt_to_phys(propval),
+ ¶m.proplen);
+
+ if (param.ret == 0) {
+ if (copy_to_user(upropval, propval, param.proplen) ||
+ put_user(param.proplen, &p->proplen)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ }
+ }
+
+ if (put_user(param.ret, &p->ret))
+ ret = -EFAULT;
+
+out:
+ kfree(path);
+ kfree(propval);
+ kfree(propname);
+
+ return ret;
+}
+
+/*
+ * Ioctl main entry point
+ */
+static long fsl_hv_ioctl(struct file *file, unsigned int cmd,
+ unsigned long argaddr)
+{
+ void __user *arg = (void __user *)argaddr;
+ long ret;
+
+ switch (cmd) {
+ case FSL_HV_IOCTL_PARTITION_RESTART:
+ ret = ioctl_restart(arg);
+ break;
+ case FSL_HV_IOCTL_PARTITION_GET_STATUS:
+ ret = ioctl_status(arg);
+ break;
+ case FSL_HV_IOCTL_PARTITION_START:
+ ret = ioctl_start(arg);
+ break;
+ case FSL_HV_IOCTL_PARTITION_STOP:
+ ret = ioctl_stop(arg);
+ break;
+ case FSL_HV_IOCTL_MEMCPY:
+ ret = ioctl_memcpy(arg);
+ break;
+ case FSL_HV_IOCTL_DOORBELL:
+ ret = ioctl_doorbell(arg);
+ break;
+ case FSL_HV_IOCTL_GETPROP:
+ ret = ioctl_dtprop(arg, 0);
+ break;
+ case FSL_HV_IOCTL_SETPROP:
+ ret = ioctl_dtprop(arg, 1);
+ break;
+ default:
+ pr_debug("fsl-hv: bad ioctl dir=%u type=%u cmd=%u size=%u\n",
+ _IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd),
+ _IOC_SIZE(cmd));
+ return -ENOTTY;
+ }
+
+ return ret;
+}
+
+/* Linked list of processes that have us open */
+static struct list_head db_list;
+
+/* spinlock for db_list */
+static DEFINE_SPINLOCK(db_list_lock);
+
+/* The size of the doorbell event queue. This must be a power of two. */
+#define QSIZE 16
+
+/* Returns the next head/tail pointer, wrapping around the queue if necessary */
+#define nextp(x) (((x) + 1) & (QSIZE - 1))
+
+/* Per-open data structure */
+struct doorbell_queue {
+ struct list_head list;
+ spinlock_t lock;
+ wait_queue_head_t wait;
+ unsigned int head;
+ unsigned int tail;
+ uint32_t q[QSIZE];
+};
+
+/* Linked list of ISRs that we registered */
+struct list_head isr_list;
+
+/* Per-ISR data structure */
+struct doorbell_isr {
+ struct list_head list;
+ unsigned int irq;
+ uint32_t doorbell; /* The doorbell handle */
+ uint32_t partition; /* The partition handle, if used */
+};
+
+/*
+ * Add a doorbell to all of the doorbell queues
+ */
+static void fsl_hv_queue_doorbell(uint32_t doorbell)
+{
+ struct doorbell_queue *dbq;
+ unsigned long flags;
+
+ /* Prevent another core from modifying db_list */
+ spin_lock_irqsave(&db_list_lock, flags);
+
+ list_for_each_entry(dbq, &db_list, list) {
+ if (dbq->head != nextp(dbq->tail)) {
+ dbq->q[dbq->tail] = doorbell;
+ /*
+ * This memory barrier eliminates the need to grab
+ * the spinlock for dbq.
+ */
+ smp_wmb();
+ dbq->tail = nextp(dbq->tail);
+ wake_up_interruptible(&dbq->wait);
+ }
+ }
+
+ spin_unlock_irqrestore(&db_list_lock, flags);
+}
+
+/*
+ * Interrupt handler for all doorbells
+ *
+ * We use the same interrupt handler for all doorbells. Whenever a doorbell
+ * is rung, and we receive an interrupt, we just put the handle for that
+ * doorbell (passed to us as *data) into all of the queues.
+ */
+static irqreturn_t fsl_hv_isr(int irq, void *data)
+{
+ fsl_hv_queue_doorbell((uintptr_t) data);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * State change thread function
+ *
+ * The state change notification arrives in an interrupt, but we can't call
+ * blocking_notifier_call_chain() in an interrupt handler. We could call
+ * atomic_notifier_call_chain(), but that would require the clients' call-back
+ * function to run in interrupt context. Since we don't want to impose that
+ * restriction on the clients, we use a threaded IRQ to process the
+ * notification in kernel context.
+ */
+static irqreturn_t fsl_hv_state_change_thread(int irq, void *data)
+{
+ struct doorbell_isr *dbisr = data;
+
+ blocking_notifier_call_chain(&failover_subscribers, dbisr->partition,
+ NULL);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Interrupt handler for state-change doorbells
+ */
+static irqreturn_t fsl_hv_state_change_isr(int irq, void *data)
+{
+ unsigned int status;
+ struct doorbell_isr *dbisr = data;
+ int ret;
+
+ /* It's still a doorbell, so add it to all the queues. */
+ fsl_hv_queue_doorbell(dbisr->doorbell);
+
+ /* Determine the new state, and if it's stopped, notify the clients. */
+ ret = fh_partition_get_status(dbisr->partition, &status);
+ if (!ret && (status == FH_PARTITION_STOPPED))
+ return IRQ_WAKE_THREAD;
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Returns a bitmask indicating whether a read will block
+ */
+static __poll_t fsl_hv_poll(struct file *filp, struct poll_table_struct *p)
+{
+ struct doorbell_queue *dbq = filp->private_data;
+ unsigned long flags;
+ __poll_t mask;
+
+ spin_lock_irqsave(&dbq->lock, flags);
+
+ poll_wait(filp, &dbq->wait, p);
+ mask = (dbq->head == dbq->tail) ? 0 : (EPOLLIN | EPOLLRDNORM);
+
+ spin_unlock_irqrestore(&dbq->lock, flags);
+
+ return mask;
+}
+
+/*
+ * Return the handles for any incoming doorbells
+ *
+ * If there are doorbell handles in the queue for this open instance, then
+ * return them to the caller as an array of 32-bit integers. Otherwise,
+ * block until there is at least one handle to return.
+ */
+static ssize_t fsl_hv_read(struct file *filp, char __user *buf, size_t len,
+ loff_t *off)
+{
+ struct doorbell_queue *dbq = filp->private_data;
+ uint32_t __user *p = (uint32_t __user *) buf; /* for put_user() */
+ unsigned long flags;
+ ssize_t count = 0;
+
+ /* Make sure we stop when the user buffer is full. */
+ while (len >= sizeof(uint32_t)) {
+ uint32_t dbell; /* Local copy of doorbell queue data */
+
+ spin_lock_irqsave(&dbq->lock, flags);
+
+ /*
+ * If the queue is empty, then either we're done or we need
+ * to block. If the application specified O_NONBLOCK, then
+ * we return the appropriate error code.
+ */
+ if (dbq->head == dbq->tail) {
+ spin_unlock_irqrestore(&dbq->lock, flags);
+ if (count)
+ break;
+ if (filp->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+ if (wait_event_interruptible(dbq->wait,
+ dbq->head != dbq->tail))
+ return -ERESTARTSYS;
+ continue;
+ }
+
+ /*
+ * Even though we have an smp_wmb() in the ISR, the core
+ * might speculatively execute the "dbell = ..." below while
+ * it's evaluating the if-statement above. In that case, the
+ * value put into dbell could be stale if the core accepts the
+ * speculation. To prevent that, we need a read memory barrier
+ * here as well.
+ */
+ smp_rmb();
+
+ /* Copy the data to a temporary local buffer, because
+ * we can't call copy_to_user() from inside a spinlock
+ */
+ dbell = dbq->q[dbq->head];
+ dbq->head = nextp(dbq->head);
+
+ spin_unlock_irqrestore(&dbq->lock, flags);
+
+ if (put_user(dbell, p))
+ return -EFAULT;
+ p++;
+ count += sizeof(uint32_t);
+ len -= sizeof(uint32_t);
+ }
+
+ return count;
+}
+
+/*
+ * Open the driver and prepare for reading doorbells.
+ *
+ * Every time an application opens the driver, we create a doorbell queue
+ * for that file handle. This queue is used for any incoming doorbells.
+ */
+static int fsl_hv_open(struct inode *inode, struct file *filp)
+{
+ struct doorbell_queue *dbq;
+ unsigned long flags;
+ int ret = 0;
+
+ dbq = kzalloc(sizeof(struct doorbell_queue), GFP_KERNEL);
+ if (!dbq) {
+ pr_err("fsl-hv: out of memory\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_init(&dbq->lock);
+ init_waitqueue_head(&dbq->wait);
+
+ spin_lock_irqsave(&db_list_lock, flags);
+ list_add(&dbq->list, &db_list);
+ spin_unlock_irqrestore(&db_list_lock, flags);
+
+ filp->private_data = dbq;
+
+ return ret;
+}
+
+/*
+ * Close the driver
+ */
+static int fsl_hv_close(struct inode *inode, struct file *filp)
+{
+ struct doorbell_queue *dbq = filp->private_data;
+ unsigned long flags;
+
+ int ret = 0;
+
+ spin_lock_irqsave(&db_list_lock, flags);
+ list_del(&dbq->list);
+ spin_unlock_irqrestore(&db_list_lock, flags);
+
+ kfree(dbq);
+
+ return ret;
+}
+
+static const struct file_operations fsl_hv_fops = {
+ .owner = THIS_MODULE,
+ .open = fsl_hv_open,
+ .release = fsl_hv_close,
+ .poll = fsl_hv_poll,
+ .read = fsl_hv_read,
+ .unlocked_ioctl = fsl_hv_ioctl,
+ .compat_ioctl = fsl_hv_ioctl,
+};
+
+static struct miscdevice fsl_hv_misc_dev = {
+ MISC_DYNAMIC_MINOR,
+ "fsl-hv",
+ &fsl_hv_fops
+};
+
+static irqreturn_t fsl_hv_shutdown_isr(int irq, void *data)
+{
+ orderly_poweroff(false);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Returns the handle of the parent of the given node
+ *
+ * The handle is the value of the 'hv-handle' property
+ */
+static int get_parent_handle(struct device_node *np)
+{
+ struct device_node *parent;
+ const uint32_t *prop;
+ uint32_t handle;
+ int len;
+
+ parent = of_get_parent(np);
+ if (!parent)
+ /* It's not really possible for this to fail */
+ return -ENODEV;
+
+ /*
+ * The proper name for the handle property is "hv-handle", but some
+ * older versions of the hypervisor used "reg".
+ */
+ prop = of_get_property(parent, "hv-handle", &len);
+ if (!prop)
+ prop = of_get_property(parent, "reg", &len);
+
+ if (!prop || (len != sizeof(uint32_t))) {
+ /* This can happen only if the node is malformed */
+ of_node_put(parent);
+ return -ENODEV;
+ }
+
+ handle = be32_to_cpup(prop);
+ of_node_put(parent);
+
+ return handle;
+}
+
+/*
+ * Register a callback for failover events
+ *
+ * This function is called by device drivers to register their callback
+ * functions for fail-over events.
+ */
+int fsl_hv_failover_register(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&failover_subscribers, nb);
+}
+EXPORT_SYMBOL(fsl_hv_failover_register);
+
+/*
+ * Unregister a callback for failover events
+ */
+int fsl_hv_failover_unregister(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_unregister(&failover_subscribers, nb);
+}
+EXPORT_SYMBOL(fsl_hv_failover_unregister);
+
+/*
+ * Return TRUE if we're running under FSL hypervisor
+ *
+ * This function checks to see if we're running under the Freescale
+ * hypervisor, and returns zero if we're not, or non-zero if we are.
+ *
+ * First, it checks if MSR[GS]==1, which means we're running under some
+ * hypervisor. Then it checks if there is a hypervisor node in the device
+ * tree. Currently, that means there needs to be a node in the root called
+ * "hypervisor" and which has a property named "fsl,hv-version".
+ */
+static int has_fsl_hypervisor(void)
+{
+ struct device_node *node;
+ int ret;
+
+ node = of_find_node_by_path("/hypervisor");
+ if (!node)
+ return 0;
+
+ ret = of_find_property(node, "fsl,hv-version", NULL) != NULL;
+
+ of_node_put(node);
+
+ return ret;
+}
+
+/*
+ * Freescale hypervisor management driver init
+ *
+ * This function is called when this module is loaded.
+ *
+ * Register ourselves as a miscellaneous driver. This will register the
+ * fops structure and create the right sysfs entries for udev.
+ */
+static int __init fsl_hypervisor_init(void)
+{
+ struct device_node *np;
+ struct doorbell_isr *dbisr, *n;
+ int ret;
+
+ pr_info("Freescale hypervisor management driver\n");
+
+ if (!has_fsl_hypervisor()) {
+ pr_info("fsl-hv: no hypervisor found\n");
+ return -ENODEV;
+ }
+
+ ret = misc_register(&fsl_hv_misc_dev);
+ if (ret) {
+ pr_err("fsl-hv: cannot register device\n");
+ return ret;
+ }
+
+ INIT_LIST_HEAD(&db_list);
+ INIT_LIST_HEAD(&isr_list);
+
+ for_each_compatible_node(np, NULL, "epapr,hv-receive-doorbell") {
+ unsigned int irq;
+ const uint32_t *handle;
+
+ handle = of_get_property(np, "interrupts", NULL);
+ irq = irq_of_parse_and_map(np, 0);
+ if (!handle || (irq == NO_IRQ)) {
+ pr_err("fsl-hv: no 'interrupts' property in %pOF node\n",
+ np);
+ continue;
+ }
+
+ dbisr = kzalloc(sizeof(*dbisr), GFP_KERNEL);
+ if (!dbisr)
+ goto out_of_memory;
+
+ dbisr->irq = irq;
+ dbisr->doorbell = be32_to_cpup(handle);
+
+ if (of_device_is_compatible(np, "fsl,hv-shutdown-doorbell")) {
+ /* The shutdown doorbell gets its own ISR */
+ ret = request_irq(irq, fsl_hv_shutdown_isr, 0,
+ np->name, NULL);
+ } else if (of_device_is_compatible(np,
+ "fsl,hv-state-change-doorbell")) {
+ /*
+ * The state change doorbell triggers a notification if
+ * the state of the managed partition changes to
+ * "stopped". We need a separate interrupt handler for
+ * that, and we also need to know the handle of the
+ * target partition, not just the handle of the
+ * doorbell.
+ */
+ dbisr->partition = ret = get_parent_handle(np);
+ if (ret < 0) {
+ pr_err("fsl-hv: node %pOF has missing or "
+ "malformed parent\n", np);
+ kfree(dbisr);
+ continue;
+ }
+ ret = request_threaded_irq(irq, fsl_hv_state_change_isr,
+ fsl_hv_state_change_thread,
+ 0, np->name, dbisr);
+ } else
+ ret = request_irq(irq, fsl_hv_isr, 0, np->name, dbisr);
+
+ if (ret < 0) {
+ pr_err("fsl-hv: could not request irq %u for node %pOF\n",
+ irq, np);
+ kfree(dbisr);
+ continue;
+ }
+
+ list_add(&dbisr->list, &isr_list);
+
+ pr_info("fsl-hv: registered handler for doorbell %u\n",
+ dbisr->doorbell);
+ }
+
+ return 0;
+
+out_of_memory:
+ list_for_each_entry_safe(dbisr, n, &isr_list, list) {
+ free_irq(dbisr->irq, dbisr);
+ list_del(&dbisr->list);
+ kfree(dbisr);
+ }
+
+ misc_deregister(&fsl_hv_misc_dev);
+
+ return -ENOMEM;
+}
+
+/*
+ * Freescale hypervisor management driver termination
+ *
+ * This function is called when this driver is unloaded.
+ */
+static void __exit fsl_hypervisor_exit(void)
+{
+ struct doorbell_isr *dbisr, *n;
+
+ list_for_each_entry_safe(dbisr, n, &isr_list, list) {
+ free_irq(dbisr->irq, dbisr);
+ list_del(&dbisr->list);
+ kfree(dbisr);
+ }
+
+ misc_deregister(&fsl_hv_misc_dev);
+}
+
+module_init(fsl_hypervisor_init);
+module_exit(fsl_hypervisor_exit);
+
+MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
+MODULE_DESCRIPTION("Freescale hypervisor management driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/virt/vboxguest/Kconfig b/drivers/virt/vboxguest/Kconfig
new file mode 100644
index 0000000..fffd318
--- /dev/null
+++ b/drivers/virt/vboxguest/Kconfig
@@ -0,0 +1,18 @@
+config VBOXGUEST
+ tristate "Virtual Box Guest integration support"
+ depends on X86 && PCI && INPUT
+ help
+ This is a driver for the Virtual Box Guest PCI device used in
+ Virtual Box virtual machines. Enabling this driver will add
+ support for Virtual Box Guest integration features such as
+ copy-and-paste, seamless mode and OpenGL pass-through.
+
+ This driver also offers vboxguest IPC functionality which is needed
+ for the vboxfs driver which offers folder sharing support.
+
+ If you enable this driver you should also enable the VBOXVIDEO option.
+
+ Although it is possible to build this module in, it is advised
+ to build this driver as a module, so that it can be updated
+ independently of the kernel. Select M to build this driver as a
+ module.
diff --git a/drivers/virt/vboxguest/Makefile b/drivers/virt/vboxguest/Makefile
new file mode 100644
index 0000000..203b8f4
--- /dev/null
+++ b/drivers/virt/vboxguest/Makefile
@@ -0,0 +1,3 @@
+vboxguest-y := vboxguest_linux.o vboxguest_core.o vboxguest_utils.o
+
+obj-$(CONFIG_VBOXGUEST) += vboxguest.o
diff --git a/drivers/virt/vboxguest/vboxguest_core.c b/drivers/virt/vboxguest/vboxguest_core.c
new file mode 100644
index 0000000..3093655
--- /dev/null
+++ b/drivers/virt/vboxguest/vboxguest_core.c
@@ -0,0 +1,1578 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */
+/*
+ * vboxguest core guest-device handling code, VBoxGuest.cpp in upstream svn.
+ *
+ * Copyright (C) 2007-2016 Oracle Corporation
+ */
+
+#include <linux/device.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+#include <linux/vbox_err.h>
+#include <linux/vbox_utils.h>
+#include <linux/vmalloc.h>
+#include "vboxguest_core.h"
+#include "vboxguest_version.h"
+
+/* Get the pointer to the first HGCM parameter. */
+#define VBG_IOCTL_HGCM_CALL_PARMS(a) \
+ ((struct vmmdev_hgcm_function_parameter *)( \
+ (u8 *)(a) + sizeof(struct vbg_ioctl_hgcm_call)))
+/* Get the pointer to the first HGCM parameter in a 32-bit request. */
+#define VBG_IOCTL_HGCM_CALL_PARMS32(a) \
+ ((struct vmmdev_hgcm_function_parameter32 *)( \
+ (u8 *)(a) + sizeof(struct vbg_ioctl_hgcm_call)))
+
+#define GUEST_MAPPINGS_TRIES 5
+
+/**
+ * Reserves memory in which the VMM can relocate any guest mappings
+ * that are floating around.
+ *
+ * This operation is a little bit tricky since the VMM might not accept
+ * just any address because of address clashes between the three contexts
+ * it operates in, so we try several times.
+ *
+ * Failure to reserve the guest mappings is ignored.
+ *
+ * @gdev: The Guest extension device.
+ */
+static void vbg_guest_mappings_init(struct vbg_dev *gdev)
+{
+ struct vmmdev_hypervisorinfo *req;
+ void *guest_mappings[GUEST_MAPPINGS_TRIES];
+ struct page **pages = NULL;
+ u32 size, hypervisor_size;
+ int i, rc;
+
+ /* Query the required space. */
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_GET_HYPERVISOR_INFO);
+ if (!req)
+ return;
+
+ req->hypervisor_start = 0;
+ req->hypervisor_size = 0;
+ rc = vbg_req_perform(gdev, req);
+ if (rc < 0)
+ goto out;
+
+ /*
+ * The VMM will report back if there is nothing it wants to map, like
+ * for instance in VT-x and AMD-V mode.
+ */
+ if (req->hypervisor_size == 0)
+ goto out;
+
+ hypervisor_size = req->hypervisor_size;
+ /* Add 4M so that we can align the vmap to 4MiB as the host requires. */
+ size = PAGE_ALIGN(req->hypervisor_size) + SZ_4M;
+
+ pages = kmalloc_array(size >> PAGE_SHIFT, sizeof(*pages), GFP_KERNEL);
+ if (!pages)
+ goto out;
+
+ gdev->guest_mappings_dummy_page = alloc_page(GFP_HIGHUSER);
+ if (!gdev->guest_mappings_dummy_page)
+ goto out;
+
+ for (i = 0; i < (size >> PAGE_SHIFT); i++)
+ pages[i] = gdev->guest_mappings_dummy_page;
+
+ /*
+ * Try several times, the VMM might not accept some addresses because
+ * of address clashes between the three contexts.
+ */
+ for (i = 0; i < GUEST_MAPPINGS_TRIES; i++) {
+ guest_mappings[i] = vmap(pages, (size >> PAGE_SHIFT),
+ VM_MAP, PAGE_KERNEL_RO);
+ if (!guest_mappings[i])
+ break;
+
+ req->header.request_type = VMMDEVREQ_SET_HYPERVISOR_INFO;
+ req->header.rc = VERR_INTERNAL_ERROR;
+ req->hypervisor_size = hypervisor_size;
+ req->hypervisor_start =
+ (unsigned long)PTR_ALIGN(guest_mappings[i], SZ_4M);
+
+ rc = vbg_req_perform(gdev, req);
+ if (rc >= 0) {
+ gdev->guest_mappings = guest_mappings[i];
+ break;
+ }
+ }
+
+ /* Free vmap's from failed attempts. */
+ while (--i >= 0)
+ vunmap(guest_mappings[i]);
+
+ /* On failure free the dummy-page backing the vmap */
+ if (!gdev->guest_mappings) {
+ __free_page(gdev->guest_mappings_dummy_page);
+ gdev->guest_mappings_dummy_page = NULL;
+ }
+
+out:
+ vbg_req_free(req, sizeof(*req));
+ kfree(pages);
+}
+
+/**
+ * Undo what vbg_guest_mappings_init did.
+ *
+ * @gdev: The Guest extension device.
+ */
+static void vbg_guest_mappings_exit(struct vbg_dev *gdev)
+{
+ struct vmmdev_hypervisorinfo *req;
+ int rc;
+
+ if (!gdev->guest_mappings)
+ return;
+
+ /*
+ * Tell the host that we're going to free the memory we reserved for
+ * it, the free it up. (Leak the memory if anything goes wrong here.)
+ */
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_SET_HYPERVISOR_INFO);
+ if (!req)
+ return;
+
+ req->hypervisor_start = 0;
+ req->hypervisor_size = 0;
+
+ rc = vbg_req_perform(gdev, req);
+
+ vbg_req_free(req, sizeof(*req));
+
+ if (rc < 0) {
+ vbg_err("%s error: %d\n", __func__, rc);
+ return;
+ }
+
+ vunmap(gdev->guest_mappings);
+ gdev->guest_mappings = NULL;
+
+ __free_page(gdev->guest_mappings_dummy_page);
+ gdev->guest_mappings_dummy_page = NULL;
+}
+
+/**
+ * Report the guest information to the host.
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ */
+static int vbg_report_guest_info(struct vbg_dev *gdev)
+{
+ /*
+ * Allocate and fill in the two guest info reports.
+ */
+ struct vmmdev_guest_info *req1 = NULL;
+ struct vmmdev_guest_info2 *req2 = NULL;
+ int rc, ret = -ENOMEM;
+
+ req1 = vbg_req_alloc(sizeof(*req1), VMMDEVREQ_REPORT_GUEST_INFO);
+ req2 = vbg_req_alloc(sizeof(*req2), VMMDEVREQ_REPORT_GUEST_INFO2);
+ if (!req1 || !req2)
+ goto out_free;
+
+ req1->interface_version = VMMDEV_VERSION;
+ req1->os_type = VMMDEV_OSTYPE_LINUX26;
+#if __BITS_PER_LONG == 64
+ req1->os_type |= VMMDEV_OSTYPE_X64;
+#endif
+
+ req2->additions_major = VBG_VERSION_MAJOR;
+ req2->additions_minor = VBG_VERSION_MINOR;
+ req2->additions_build = VBG_VERSION_BUILD;
+ req2->additions_revision = VBG_SVN_REV;
+ /* (no features defined yet) */
+ req2->additions_features = 0;
+ strlcpy(req2->name, VBG_VERSION_STRING,
+ sizeof(req2->name));
+
+ /*
+ * There are two protocols here:
+ * 1. INFO2 + INFO1. Supported by >=3.2.51.
+ * 2. INFO1 and optionally INFO2. The old protocol.
+ *
+ * We try protocol 2 first. It will fail with VERR_NOT_SUPPORTED
+ * if not supported by the VMMDev (message ordering requirement).
+ */
+ rc = vbg_req_perform(gdev, req2);
+ if (rc >= 0) {
+ rc = vbg_req_perform(gdev, req1);
+ } else if (rc == VERR_NOT_SUPPORTED || rc == VERR_NOT_IMPLEMENTED) {
+ rc = vbg_req_perform(gdev, req1);
+ if (rc >= 0) {
+ rc = vbg_req_perform(gdev, req2);
+ if (rc == VERR_NOT_IMPLEMENTED)
+ rc = VINF_SUCCESS;
+ }
+ }
+ ret = vbg_status_code_to_errno(rc);
+
+out_free:
+ vbg_req_free(req2, sizeof(*req2));
+ vbg_req_free(req1, sizeof(*req1));
+ return ret;
+}
+
+/**
+ * Report the guest driver status to the host.
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ * @active: Flag whether the driver is now active or not.
+ */
+static int vbg_report_driver_status(struct vbg_dev *gdev, bool active)
+{
+ struct vmmdev_guest_status *req;
+ int rc;
+
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_REPORT_GUEST_STATUS);
+ if (!req)
+ return -ENOMEM;
+
+ req->facility = VBOXGUEST_FACILITY_TYPE_VBOXGUEST_DRIVER;
+ if (active)
+ req->status = VBOXGUEST_FACILITY_STATUS_ACTIVE;
+ else
+ req->status = VBOXGUEST_FACILITY_STATUS_INACTIVE;
+ req->flags = 0;
+
+ rc = vbg_req_perform(gdev, req);
+ if (rc == VERR_NOT_IMPLEMENTED) /* Compatibility with older hosts. */
+ rc = VINF_SUCCESS;
+
+ vbg_req_free(req, sizeof(*req));
+
+ return vbg_status_code_to_errno(rc);
+}
+
+/**
+ * Inflate the balloon by one chunk. The caller owns the balloon mutex.
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ * @chunk_idx: Index of the chunk.
+ */
+static int vbg_balloon_inflate(struct vbg_dev *gdev, u32 chunk_idx)
+{
+ struct vmmdev_memballoon_change *req = gdev->mem_balloon.change_req;
+ struct page **pages;
+ int i, rc, ret;
+
+ pages = kmalloc_array(VMMDEV_MEMORY_BALLOON_CHUNK_PAGES,
+ sizeof(*pages),
+ GFP_KERNEL | __GFP_NOWARN);
+ if (!pages)
+ return -ENOMEM;
+
+ req->header.size = sizeof(*req);
+ req->inflate = true;
+ req->pages = VMMDEV_MEMORY_BALLOON_CHUNK_PAGES;
+
+ for (i = 0; i < VMMDEV_MEMORY_BALLOON_CHUNK_PAGES; i++) {
+ pages[i] = alloc_page(GFP_KERNEL | __GFP_NOWARN);
+ if (!pages[i]) {
+ ret = -ENOMEM;
+ goto out_error;
+ }
+
+ req->phys_page[i] = page_to_phys(pages[i]);
+ }
+
+ rc = vbg_req_perform(gdev, req);
+ if (rc < 0) {
+ vbg_err("%s error, rc: %d\n", __func__, rc);
+ ret = vbg_status_code_to_errno(rc);
+ goto out_error;
+ }
+
+ gdev->mem_balloon.pages[chunk_idx] = pages;
+
+ return 0;
+
+out_error:
+ while (--i >= 0)
+ __free_page(pages[i]);
+ kfree(pages);
+
+ return ret;
+}
+
+/**
+ * Deflate the balloon by one chunk. The caller owns the balloon mutex.
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ * @chunk_idx: Index of the chunk.
+ */
+static int vbg_balloon_deflate(struct vbg_dev *gdev, u32 chunk_idx)
+{
+ struct vmmdev_memballoon_change *req = gdev->mem_balloon.change_req;
+ struct page **pages = gdev->mem_balloon.pages[chunk_idx];
+ int i, rc;
+
+ req->header.size = sizeof(*req);
+ req->inflate = false;
+ req->pages = VMMDEV_MEMORY_BALLOON_CHUNK_PAGES;
+
+ for (i = 0; i < VMMDEV_MEMORY_BALLOON_CHUNK_PAGES; i++)
+ req->phys_page[i] = page_to_phys(pages[i]);
+
+ rc = vbg_req_perform(gdev, req);
+ if (rc < 0) {
+ vbg_err("%s error, rc: %d\n", __func__, rc);
+ return vbg_status_code_to_errno(rc);
+ }
+
+ for (i = 0; i < VMMDEV_MEMORY_BALLOON_CHUNK_PAGES; i++)
+ __free_page(pages[i]);
+ kfree(pages);
+ gdev->mem_balloon.pages[chunk_idx] = NULL;
+
+ return 0;
+}
+
+/**
+ * Respond to VMMDEV_EVENT_BALLOON_CHANGE_REQUEST events, query the size
+ * the host wants the balloon to be and adjust accordingly.
+ */
+static void vbg_balloon_work(struct work_struct *work)
+{
+ struct vbg_dev *gdev =
+ container_of(work, struct vbg_dev, mem_balloon.work);
+ struct vmmdev_memballoon_info *req = gdev->mem_balloon.get_req;
+ u32 i, chunks;
+ int rc, ret;
+
+ /*
+ * Setting this bit means that we request the value from the host and
+ * change the guest memory balloon according to the returned value.
+ */
+ req->event_ack = VMMDEV_EVENT_BALLOON_CHANGE_REQUEST;
+ rc = vbg_req_perform(gdev, req);
+ if (rc < 0) {
+ vbg_err("%s error, rc: %d)\n", __func__, rc);
+ return;
+ }
+
+ /*
+ * The host always returns the same maximum amount of chunks, so
+ * we do this once.
+ */
+ if (!gdev->mem_balloon.max_chunks) {
+ gdev->mem_balloon.pages =
+ devm_kcalloc(gdev->dev, req->phys_mem_chunks,
+ sizeof(struct page **), GFP_KERNEL);
+ if (!gdev->mem_balloon.pages)
+ return;
+
+ gdev->mem_balloon.max_chunks = req->phys_mem_chunks;
+ }
+
+ chunks = req->balloon_chunks;
+ if (chunks > gdev->mem_balloon.max_chunks) {
+ vbg_err("%s: illegal balloon size %u (max=%u)\n",
+ __func__, chunks, gdev->mem_balloon.max_chunks);
+ return;
+ }
+
+ if (chunks > gdev->mem_balloon.chunks) {
+ /* inflate */
+ for (i = gdev->mem_balloon.chunks; i < chunks; i++) {
+ ret = vbg_balloon_inflate(gdev, i);
+ if (ret < 0)
+ return;
+
+ gdev->mem_balloon.chunks++;
+ }
+ } else {
+ /* deflate */
+ for (i = gdev->mem_balloon.chunks; i-- > chunks;) {
+ ret = vbg_balloon_deflate(gdev, i);
+ if (ret < 0)
+ return;
+
+ gdev->mem_balloon.chunks--;
+ }
+ }
+}
+
+/**
+ * Callback for heartbeat timer.
+ */
+static void vbg_heartbeat_timer(struct timer_list *t)
+{
+ struct vbg_dev *gdev = from_timer(gdev, t, heartbeat_timer);
+
+ vbg_req_perform(gdev, gdev->guest_heartbeat_req);
+ mod_timer(&gdev->heartbeat_timer,
+ msecs_to_jiffies(gdev->heartbeat_interval_ms));
+}
+
+/**
+ * Configure the host to check guest's heartbeat
+ * and get heartbeat interval from the host.
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ * @enabled: Set true to enable guest heartbeat checks on host.
+ */
+static int vbg_heartbeat_host_config(struct vbg_dev *gdev, bool enabled)
+{
+ struct vmmdev_heartbeat *req;
+ int rc;
+
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_HEARTBEAT_CONFIGURE);
+ if (!req)
+ return -ENOMEM;
+
+ req->enabled = enabled;
+ req->interval_ns = 0;
+ rc = vbg_req_perform(gdev, req);
+ do_div(req->interval_ns, 1000000); /* ns -> ms */
+ gdev->heartbeat_interval_ms = req->interval_ns;
+ vbg_req_free(req, sizeof(*req));
+
+ return vbg_status_code_to_errno(rc);
+}
+
+/**
+ * Initializes the heartbeat timer. This feature may be disabled by the host.
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ */
+static int vbg_heartbeat_init(struct vbg_dev *gdev)
+{
+ int ret;
+
+ /* Make sure that heartbeat checking is disabled if we fail. */
+ ret = vbg_heartbeat_host_config(gdev, false);
+ if (ret < 0)
+ return ret;
+
+ ret = vbg_heartbeat_host_config(gdev, true);
+ if (ret < 0)
+ return ret;
+
+ gdev->guest_heartbeat_req = vbg_req_alloc(
+ sizeof(*gdev->guest_heartbeat_req),
+ VMMDEVREQ_GUEST_HEARTBEAT);
+ if (!gdev->guest_heartbeat_req)
+ return -ENOMEM;
+
+ vbg_info("%s: Setting up heartbeat to trigger every %d milliseconds\n",
+ __func__, gdev->heartbeat_interval_ms);
+ mod_timer(&gdev->heartbeat_timer, 0);
+
+ return 0;
+}
+
+/**
+ * Cleanup hearbeat code, stop HB timer and disable host heartbeat checking.
+ * @gdev: The Guest extension device.
+ */
+static void vbg_heartbeat_exit(struct vbg_dev *gdev)
+{
+ del_timer_sync(&gdev->heartbeat_timer);
+ vbg_heartbeat_host_config(gdev, false);
+ vbg_req_free(gdev->guest_heartbeat_req,
+ sizeof(*gdev->guest_heartbeat_req));
+}
+
+/**
+ * Applies a change to the bit usage tracker.
+ * Return: true if the mask changed, false if not.
+ * @tracker: The bit usage tracker.
+ * @changed: The bits to change.
+ * @previous: The previous value of the bits.
+ */
+static bool vbg_track_bit_usage(struct vbg_bit_usage_tracker *tracker,
+ u32 changed, u32 previous)
+{
+ bool global_change = false;
+
+ while (changed) {
+ u32 bit = ffs(changed) - 1;
+ u32 bitmask = BIT(bit);
+
+ if (bitmask & previous) {
+ tracker->per_bit_usage[bit] -= 1;
+ if (tracker->per_bit_usage[bit] == 0) {
+ global_change = true;
+ tracker->mask &= ~bitmask;
+ }
+ } else {
+ tracker->per_bit_usage[bit] += 1;
+ if (tracker->per_bit_usage[bit] == 1) {
+ global_change = true;
+ tracker->mask |= bitmask;
+ }
+ }
+
+ changed &= ~bitmask;
+ }
+
+ return global_change;
+}
+
+/**
+ * Init and termination worker for resetting the (host) event filter on the host
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ * @fixed_events: Fixed events (init time).
+ */
+static int vbg_reset_host_event_filter(struct vbg_dev *gdev,
+ u32 fixed_events)
+{
+ struct vmmdev_mask *req;
+ int rc;
+
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_CTL_GUEST_FILTER_MASK);
+ if (!req)
+ return -ENOMEM;
+
+ req->not_mask = U32_MAX & ~fixed_events;
+ req->or_mask = fixed_events;
+ rc = vbg_req_perform(gdev, req);
+ if (rc < 0)
+ vbg_err("%s error, rc: %d\n", __func__, rc);
+
+ vbg_req_free(req, sizeof(*req));
+ return vbg_status_code_to_errno(rc);
+}
+
+/**
+ * Changes the event filter mask for the given session.
+ *
+ * This is called in response to VBG_IOCTL_CHANGE_FILTER_MASK as well as to
+ * do session cleanup. Takes the session spinlock.
+ *
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ * @session: The session.
+ * @or_mask: The events to add.
+ * @not_mask: The events to remove.
+ * @session_termination: Set if we're called by the session cleanup code.
+ * This tweaks the error handling so we perform
+ * proper session cleanup even if the host
+ * misbehaves.
+ */
+static int vbg_set_session_event_filter(struct vbg_dev *gdev,
+ struct vbg_session *session,
+ u32 or_mask, u32 not_mask,
+ bool session_termination)
+{
+ struct vmmdev_mask *req;
+ u32 changed, previous;
+ int rc, ret = 0;
+
+ /* Allocate a request buffer before taking the spinlock */
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_CTL_GUEST_FILTER_MASK);
+ if (!req) {
+ if (!session_termination)
+ return -ENOMEM;
+ /* Ignore allocation failure, we must do session cleanup. */
+ }
+
+ mutex_lock(&gdev->session_mutex);
+
+ /* Apply the changes to the session mask. */
+ previous = session->event_filter;
+ session->event_filter |= or_mask;
+ session->event_filter &= ~not_mask;
+
+ /* If anything actually changed, update the global usage counters. */
+ changed = previous ^ session->event_filter;
+ if (!changed)
+ goto out;
+
+ vbg_track_bit_usage(&gdev->event_filter_tracker, changed, previous);
+ or_mask = gdev->fixed_events | gdev->event_filter_tracker.mask;
+
+ if (gdev->event_filter_host == or_mask || !req)
+ goto out;
+
+ gdev->event_filter_host = or_mask;
+ req->or_mask = or_mask;
+ req->not_mask = ~or_mask;
+ rc = vbg_req_perform(gdev, req);
+ if (rc < 0) {
+ ret = vbg_status_code_to_errno(rc);
+
+ /* Failed, roll back (unless it's session termination time). */
+ gdev->event_filter_host = U32_MAX;
+ if (session_termination)
+ goto out;
+
+ vbg_track_bit_usage(&gdev->event_filter_tracker, changed,
+ session->event_filter);
+ session->event_filter = previous;
+ }
+
+out:
+ mutex_unlock(&gdev->session_mutex);
+ vbg_req_free(req, sizeof(*req));
+
+ return ret;
+}
+
+/**
+ * Init and termination worker for set guest capabilities to zero on the host.
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ */
+static int vbg_reset_host_capabilities(struct vbg_dev *gdev)
+{
+ struct vmmdev_mask *req;
+ int rc;
+
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_SET_GUEST_CAPABILITIES);
+ if (!req)
+ return -ENOMEM;
+
+ req->not_mask = U32_MAX;
+ req->or_mask = 0;
+ rc = vbg_req_perform(gdev, req);
+ if (rc < 0)
+ vbg_err("%s error, rc: %d\n", __func__, rc);
+
+ vbg_req_free(req, sizeof(*req));
+ return vbg_status_code_to_errno(rc);
+}
+
+/**
+ * Sets the guest capabilities for a session. Takes the session spinlock.
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ * @session: The session.
+ * @or_mask: The capabilities to add.
+ * @not_mask: The capabilities to remove.
+ * @session_termination: Set if we're called by the session cleanup code.
+ * This tweaks the error handling so we perform
+ * proper session cleanup even if the host
+ * misbehaves.
+ */
+static int vbg_set_session_capabilities(struct vbg_dev *gdev,
+ struct vbg_session *session,
+ u32 or_mask, u32 not_mask,
+ bool session_termination)
+{
+ struct vmmdev_mask *req;
+ u32 changed, previous;
+ int rc, ret = 0;
+
+ /* Allocate a request buffer before taking the spinlock */
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_SET_GUEST_CAPABILITIES);
+ if (!req) {
+ if (!session_termination)
+ return -ENOMEM;
+ /* Ignore allocation failure, we must do session cleanup. */
+ }
+
+ mutex_lock(&gdev->session_mutex);
+
+ /* Apply the changes to the session mask. */
+ previous = session->guest_caps;
+ session->guest_caps |= or_mask;
+ session->guest_caps &= ~not_mask;
+
+ /* If anything actually changed, update the global usage counters. */
+ changed = previous ^ session->guest_caps;
+ if (!changed)
+ goto out;
+
+ vbg_track_bit_usage(&gdev->guest_caps_tracker, changed, previous);
+ or_mask = gdev->guest_caps_tracker.mask;
+
+ if (gdev->guest_caps_host == or_mask || !req)
+ goto out;
+
+ gdev->guest_caps_host = or_mask;
+ req->or_mask = or_mask;
+ req->not_mask = ~or_mask;
+ rc = vbg_req_perform(gdev, req);
+ if (rc < 0) {
+ ret = vbg_status_code_to_errno(rc);
+
+ /* Failed, roll back (unless it's session termination time). */
+ gdev->guest_caps_host = U32_MAX;
+ if (session_termination)
+ goto out;
+
+ vbg_track_bit_usage(&gdev->guest_caps_tracker, changed,
+ session->guest_caps);
+ session->guest_caps = previous;
+ }
+
+out:
+ mutex_unlock(&gdev->session_mutex);
+ vbg_req_free(req, sizeof(*req));
+
+ return ret;
+}
+
+/**
+ * vbg_query_host_version get the host feature mask and version information.
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ */
+static int vbg_query_host_version(struct vbg_dev *gdev)
+{
+ struct vmmdev_host_version *req;
+ int rc, ret;
+
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_GET_HOST_VERSION);
+ if (!req)
+ return -ENOMEM;
+
+ rc = vbg_req_perform(gdev, req);
+ ret = vbg_status_code_to_errno(rc);
+ if (ret) {
+ vbg_err("%s error: %d\n", __func__, rc);
+ goto out;
+ }
+
+ snprintf(gdev->host_version, sizeof(gdev->host_version), "%u.%u.%ur%u",
+ req->major, req->minor, req->build, req->revision);
+ gdev->host_features = req->features;
+
+ vbg_info("vboxguest: host-version: %s %#x\n", gdev->host_version,
+ gdev->host_features);
+
+ if (!(req->features & VMMDEV_HVF_HGCM_PHYS_PAGE_LIST)) {
+ vbg_err("vboxguest: Error host too old (does not support page-lists)\n");
+ ret = -ENODEV;
+ }
+
+out:
+ vbg_req_free(req, sizeof(*req));
+ return ret;
+}
+
+/**
+ * Initializes the VBoxGuest device extension when the
+ * device driver is loaded.
+ *
+ * The native code locates the VMMDev on the PCI bus and retrieve
+ * the MMIO and I/O port ranges, this function will take care of
+ * mapping the MMIO memory (if present). Upon successful return
+ * the native code should set up the interrupt handler.
+ *
+ * Return: 0 or negative errno value.
+ *
+ * @gdev: The Guest extension device.
+ * @fixed_events: Events that will be enabled upon init and no client
+ * will ever be allowed to mask.
+ */
+int vbg_core_init(struct vbg_dev *gdev, u32 fixed_events)
+{
+ int ret = -ENOMEM;
+
+ gdev->fixed_events = fixed_events | VMMDEV_EVENT_HGCM;
+ gdev->event_filter_host = U32_MAX; /* forces a report */
+ gdev->guest_caps_host = U32_MAX; /* forces a report */
+
+ init_waitqueue_head(&gdev->event_wq);
+ init_waitqueue_head(&gdev->hgcm_wq);
+ spin_lock_init(&gdev->event_spinlock);
+ mutex_init(&gdev->session_mutex);
+ mutex_init(&gdev->cancel_req_mutex);
+ timer_setup(&gdev->heartbeat_timer, vbg_heartbeat_timer, 0);
+ INIT_WORK(&gdev->mem_balloon.work, vbg_balloon_work);
+
+ gdev->mem_balloon.get_req =
+ vbg_req_alloc(sizeof(*gdev->mem_balloon.get_req),
+ VMMDEVREQ_GET_MEMBALLOON_CHANGE_REQ);
+ gdev->mem_balloon.change_req =
+ vbg_req_alloc(sizeof(*gdev->mem_balloon.change_req),
+ VMMDEVREQ_CHANGE_MEMBALLOON);
+ gdev->cancel_req =
+ vbg_req_alloc(sizeof(*(gdev->cancel_req)),
+ VMMDEVREQ_HGCM_CANCEL2);
+ gdev->ack_events_req =
+ vbg_req_alloc(sizeof(*gdev->ack_events_req),
+ VMMDEVREQ_ACKNOWLEDGE_EVENTS);
+ gdev->mouse_status_req =
+ vbg_req_alloc(sizeof(*gdev->mouse_status_req),
+ VMMDEVREQ_GET_MOUSE_STATUS);
+
+ if (!gdev->mem_balloon.get_req || !gdev->mem_balloon.change_req ||
+ !gdev->cancel_req || !gdev->ack_events_req ||
+ !gdev->mouse_status_req)
+ goto err_free_reqs;
+
+ ret = vbg_query_host_version(gdev);
+ if (ret)
+ goto err_free_reqs;
+
+ ret = vbg_report_guest_info(gdev);
+ if (ret) {
+ vbg_err("vboxguest: vbg_report_guest_info error: %d\n", ret);
+ goto err_free_reqs;
+ }
+
+ ret = vbg_reset_host_event_filter(gdev, gdev->fixed_events);
+ if (ret) {
+ vbg_err("vboxguest: Error setting fixed event filter: %d\n",
+ ret);
+ goto err_free_reqs;
+ }
+
+ ret = vbg_reset_host_capabilities(gdev);
+ if (ret) {
+ vbg_err("vboxguest: Error clearing guest capabilities: %d\n",
+ ret);
+ goto err_free_reqs;
+ }
+
+ ret = vbg_core_set_mouse_status(gdev, 0);
+ if (ret) {
+ vbg_err("vboxguest: Error clearing mouse status: %d\n", ret);
+ goto err_free_reqs;
+ }
+
+ /* These may fail without requiring the driver init to fail. */
+ vbg_guest_mappings_init(gdev);
+ vbg_heartbeat_init(gdev);
+
+ /* All Done! */
+ ret = vbg_report_driver_status(gdev, true);
+ if (ret < 0)
+ vbg_err("vboxguest: Error reporting driver status: %d\n", ret);
+
+ return 0;
+
+err_free_reqs:
+ vbg_req_free(gdev->mouse_status_req,
+ sizeof(*gdev->mouse_status_req));
+ vbg_req_free(gdev->ack_events_req,
+ sizeof(*gdev->ack_events_req));
+ vbg_req_free(gdev->cancel_req,
+ sizeof(*gdev->cancel_req));
+ vbg_req_free(gdev->mem_balloon.change_req,
+ sizeof(*gdev->mem_balloon.change_req));
+ vbg_req_free(gdev->mem_balloon.get_req,
+ sizeof(*gdev->mem_balloon.get_req));
+ return ret;
+}
+
+/**
+ * Call this on exit to clean-up vboxguest-core managed resources.
+ *
+ * The native code should call this before the driver is loaded,
+ * but don't call this on shutdown.
+ * @gdev: The Guest extension device.
+ */
+void vbg_core_exit(struct vbg_dev *gdev)
+{
+ vbg_heartbeat_exit(gdev);
+ vbg_guest_mappings_exit(gdev);
+
+ /* Clear the host flags (mouse status etc). */
+ vbg_reset_host_event_filter(gdev, 0);
+ vbg_reset_host_capabilities(gdev);
+ vbg_core_set_mouse_status(gdev, 0);
+
+ vbg_req_free(gdev->mouse_status_req,
+ sizeof(*gdev->mouse_status_req));
+ vbg_req_free(gdev->ack_events_req,
+ sizeof(*gdev->ack_events_req));
+ vbg_req_free(gdev->cancel_req,
+ sizeof(*gdev->cancel_req));
+ vbg_req_free(gdev->mem_balloon.change_req,
+ sizeof(*gdev->mem_balloon.change_req));
+ vbg_req_free(gdev->mem_balloon.get_req,
+ sizeof(*gdev->mem_balloon.get_req));
+}
+
+/**
+ * Creates a VBoxGuest user session.
+ *
+ * vboxguest_linux.c calls this when userspace opens the char-device.
+ * Return: A pointer to the new session or an ERR_PTR on error.
+ * @gdev: The Guest extension device.
+ * @user: Set if this is a session for the vboxuser device.
+ */
+struct vbg_session *vbg_core_open_session(struct vbg_dev *gdev, bool user)
+{
+ struct vbg_session *session;
+
+ session = kzalloc(sizeof(*session), GFP_KERNEL);
+ if (!session)
+ return ERR_PTR(-ENOMEM);
+
+ session->gdev = gdev;
+ session->user_session = user;
+
+ return session;
+}
+
+/**
+ * Closes a VBoxGuest session.
+ * @session: The session to close (and free).
+ */
+void vbg_core_close_session(struct vbg_session *session)
+{
+ struct vbg_dev *gdev = session->gdev;
+ int i, rc;
+
+ vbg_set_session_capabilities(gdev, session, 0, U32_MAX, true);
+ vbg_set_session_event_filter(gdev, session, 0, U32_MAX, true);
+
+ for (i = 0; i < ARRAY_SIZE(session->hgcm_client_ids); i++) {
+ if (!session->hgcm_client_ids[i])
+ continue;
+
+ vbg_hgcm_disconnect(gdev, session->hgcm_client_ids[i], &rc);
+ }
+
+ kfree(session);
+}
+
+static int vbg_ioctl_chk(struct vbg_ioctl_hdr *hdr, size_t in_size,
+ size_t out_size)
+{
+ if (hdr->size_in != (sizeof(*hdr) + in_size) ||
+ hdr->size_out != (sizeof(*hdr) + out_size))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int vbg_ioctl_driver_version_info(
+ struct vbg_ioctl_driver_version_info *info)
+{
+ const u16 vbg_maj_version = VBG_IOC_VERSION >> 16;
+ u16 min_maj_version, req_maj_version;
+
+ if (vbg_ioctl_chk(&info->hdr, sizeof(info->u.in), sizeof(info->u.out)))
+ return -EINVAL;
+
+ req_maj_version = info->u.in.req_version >> 16;
+ min_maj_version = info->u.in.min_version >> 16;
+
+ if (info->u.in.min_version > info->u.in.req_version ||
+ min_maj_version != req_maj_version)
+ return -EINVAL;
+
+ if (info->u.in.min_version <= VBG_IOC_VERSION &&
+ min_maj_version == vbg_maj_version) {
+ info->u.out.session_version = VBG_IOC_VERSION;
+ } else {
+ info->u.out.session_version = U32_MAX;
+ info->hdr.rc = VERR_VERSION_MISMATCH;
+ }
+
+ info->u.out.driver_version = VBG_IOC_VERSION;
+ info->u.out.driver_revision = 0;
+ info->u.out.reserved1 = 0;
+ info->u.out.reserved2 = 0;
+
+ return 0;
+}
+
+static bool vbg_wait_event_cond(struct vbg_dev *gdev,
+ struct vbg_session *session,
+ u32 event_mask)
+{
+ unsigned long flags;
+ bool wakeup;
+ u32 events;
+
+ spin_lock_irqsave(&gdev->event_spinlock, flags);
+
+ events = gdev->pending_events & event_mask;
+ wakeup = events || session->cancel_waiters;
+
+ spin_unlock_irqrestore(&gdev->event_spinlock, flags);
+
+ return wakeup;
+}
+
+/* Must be called with the event_lock held */
+static u32 vbg_consume_events_locked(struct vbg_dev *gdev,
+ struct vbg_session *session,
+ u32 event_mask)
+{
+ u32 events = gdev->pending_events & event_mask;
+
+ gdev->pending_events &= ~events;
+ return events;
+}
+
+static int vbg_ioctl_wait_for_events(struct vbg_dev *gdev,
+ struct vbg_session *session,
+ struct vbg_ioctl_wait_for_events *wait)
+{
+ u32 timeout_ms = wait->u.in.timeout_ms;
+ u32 event_mask = wait->u.in.events;
+ unsigned long flags;
+ long timeout;
+ int ret = 0;
+
+ if (vbg_ioctl_chk(&wait->hdr, sizeof(wait->u.in), sizeof(wait->u.out)))
+ return -EINVAL;
+
+ if (timeout_ms == U32_MAX)
+ timeout = MAX_SCHEDULE_TIMEOUT;
+ else
+ timeout = msecs_to_jiffies(timeout_ms);
+
+ wait->u.out.events = 0;
+ do {
+ timeout = wait_event_interruptible_timeout(
+ gdev->event_wq,
+ vbg_wait_event_cond(gdev, session, event_mask),
+ timeout);
+
+ spin_lock_irqsave(&gdev->event_spinlock, flags);
+
+ if (timeout < 0 || session->cancel_waiters) {
+ ret = -EINTR;
+ } else if (timeout == 0) {
+ ret = -ETIMEDOUT;
+ } else {
+ wait->u.out.events =
+ vbg_consume_events_locked(gdev, session, event_mask);
+ }
+
+ spin_unlock_irqrestore(&gdev->event_spinlock, flags);
+
+ /*
+ * Someone else may have consumed the event(s) first, in
+ * which case we go back to waiting.
+ */
+ } while (ret == 0 && wait->u.out.events == 0);
+
+ return ret;
+}
+
+static int vbg_ioctl_interrupt_all_wait_events(struct vbg_dev *gdev,
+ struct vbg_session *session,
+ struct vbg_ioctl_hdr *hdr)
+{
+ unsigned long flags;
+
+ if (hdr->size_in != sizeof(*hdr) || hdr->size_out != sizeof(*hdr))
+ return -EINVAL;
+
+ spin_lock_irqsave(&gdev->event_spinlock, flags);
+ session->cancel_waiters = true;
+ spin_unlock_irqrestore(&gdev->event_spinlock, flags);
+
+ wake_up(&gdev->event_wq);
+
+ return 0;
+}
+
+/**
+ * Checks if the VMM request is allowed in the context of the given session.
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ * @session: The calling session.
+ * @req: The request.
+ */
+static int vbg_req_allowed(struct vbg_dev *gdev, struct vbg_session *session,
+ const struct vmmdev_request_header *req)
+{
+ const struct vmmdev_guest_status *guest_status;
+ bool trusted_apps_only;
+
+ switch (req->request_type) {
+ /* Trusted users apps only. */
+ case VMMDEVREQ_QUERY_CREDENTIALS:
+ case VMMDEVREQ_REPORT_CREDENTIALS_JUDGEMENT:
+ case VMMDEVREQ_REGISTER_SHARED_MODULE:
+ case VMMDEVREQ_UNREGISTER_SHARED_MODULE:
+ case VMMDEVREQ_WRITE_COREDUMP:
+ case VMMDEVREQ_GET_CPU_HOTPLUG_REQ:
+ case VMMDEVREQ_SET_CPU_HOTPLUG_STATUS:
+ case VMMDEVREQ_CHECK_SHARED_MODULES:
+ case VMMDEVREQ_GET_PAGE_SHARING_STATUS:
+ case VMMDEVREQ_DEBUG_IS_PAGE_SHARED:
+ case VMMDEVREQ_REPORT_GUEST_STATS:
+ case VMMDEVREQ_REPORT_GUEST_USER_STATE:
+ case VMMDEVREQ_GET_STATISTICS_CHANGE_REQ:
+ trusted_apps_only = true;
+ break;
+
+ /* Anyone. */
+ case VMMDEVREQ_GET_MOUSE_STATUS:
+ case VMMDEVREQ_SET_MOUSE_STATUS:
+ case VMMDEVREQ_SET_POINTER_SHAPE:
+ case VMMDEVREQ_GET_HOST_VERSION:
+ case VMMDEVREQ_IDLE:
+ case VMMDEVREQ_GET_HOST_TIME:
+ case VMMDEVREQ_SET_POWER_STATUS:
+ case VMMDEVREQ_ACKNOWLEDGE_EVENTS:
+ case VMMDEVREQ_CTL_GUEST_FILTER_MASK:
+ case VMMDEVREQ_REPORT_GUEST_STATUS:
+ case VMMDEVREQ_GET_DISPLAY_CHANGE_REQ:
+ case VMMDEVREQ_VIDEMODE_SUPPORTED:
+ case VMMDEVREQ_GET_HEIGHT_REDUCTION:
+ case VMMDEVREQ_GET_DISPLAY_CHANGE_REQ2:
+ case VMMDEVREQ_VIDEMODE_SUPPORTED2:
+ case VMMDEVREQ_VIDEO_ACCEL_ENABLE:
+ case VMMDEVREQ_VIDEO_ACCEL_FLUSH:
+ case VMMDEVREQ_VIDEO_SET_VISIBLE_REGION:
+ case VMMDEVREQ_GET_DISPLAY_CHANGE_REQEX:
+ case VMMDEVREQ_GET_SEAMLESS_CHANGE_REQ:
+ case VMMDEVREQ_GET_VRDPCHANGE_REQ:
+ case VMMDEVREQ_LOG_STRING:
+ case VMMDEVREQ_GET_SESSION_ID:
+ trusted_apps_only = false;
+ break;
+
+ /* Depends on the request parameters... */
+ case VMMDEVREQ_REPORT_GUEST_CAPABILITIES:
+ guest_status = (const struct vmmdev_guest_status *)req;
+ switch (guest_status->facility) {
+ case VBOXGUEST_FACILITY_TYPE_ALL:
+ case VBOXGUEST_FACILITY_TYPE_VBOXGUEST_DRIVER:
+ vbg_err("Denying userspace vmm report guest cap. call facility %#08x\n",
+ guest_status->facility);
+ return -EPERM;
+ case VBOXGUEST_FACILITY_TYPE_VBOX_SERVICE:
+ trusted_apps_only = true;
+ break;
+ case VBOXGUEST_FACILITY_TYPE_VBOX_TRAY_CLIENT:
+ case VBOXGUEST_FACILITY_TYPE_SEAMLESS:
+ case VBOXGUEST_FACILITY_TYPE_GRAPHICS:
+ default:
+ trusted_apps_only = false;
+ break;
+ }
+ break;
+
+ /* Anything else is not allowed. */
+ default:
+ vbg_err("Denying userspace vmm call type %#08x\n",
+ req->request_type);
+ return -EPERM;
+ }
+
+ if (trusted_apps_only && session->user_session) {
+ vbg_err("Denying userspace vmm call type %#08x through vboxuser device node\n",
+ req->request_type);
+ return -EPERM;
+ }
+
+ return 0;
+}
+
+static int vbg_ioctl_vmmrequest(struct vbg_dev *gdev,
+ struct vbg_session *session, void *data)
+{
+ struct vbg_ioctl_hdr *hdr = data;
+ int ret;
+
+ if (hdr->size_in != hdr->size_out)
+ return -EINVAL;
+
+ if (hdr->size_in > VMMDEV_MAX_VMMDEVREQ_SIZE)
+ return -E2BIG;
+
+ if (hdr->type == VBG_IOCTL_HDR_TYPE_DEFAULT)
+ return -EINVAL;
+
+ ret = vbg_req_allowed(gdev, session, data);
+ if (ret < 0)
+ return ret;
+
+ vbg_req_perform(gdev, data);
+ WARN_ON(hdr->rc == VINF_HGCM_ASYNC_EXECUTE);
+
+ return 0;
+}
+
+static int vbg_ioctl_hgcm_connect(struct vbg_dev *gdev,
+ struct vbg_session *session,
+ struct vbg_ioctl_hgcm_connect *conn)
+{
+ u32 client_id;
+ int i, ret;
+
+ if (vbg_ioctl_chk(&conn->hdr, sizeof(conn->u.in), sizeof(conn->u.out)))
+ return -EINVAL;
+
+ /* Find a free place in the sessions clients array and claim it */
+ mutex_lock(&gdev->session_mutex);
+ for (i = 0; i < ARRAY_SIZE(session->hgcm_client_ids); i++) {
+ if (!session->hgcm_client_ids[i]) {
+ session->hgcm_client_ids[i] = U32_MAX;
+ break;
+ }
+ }
+ mutex_unlock(&gdev->session_mutex);
+
+ if (i >= ARRAY_SIZE(session->hgcm_client_ids))
+ return -EMFILE;
+
+ ret = vbg_hgcm_connect(gdev, &conn->u.in.loc, &client_id,
+ &conn->hdr.rc);
+
+ mutex_lock(&gdev->session_mutex);
+ if (ret == 0 && conn->hdr.rc >= 0) {
+ conn->u.out.client_id = client_id;
+ session->hgcm_client_ids[i] = client_id;
+ } else {
+ conn->u.out.client_id = 0;
+ session->hgcm_client_ids[i] = 0;
+ }
+ mutex_unlock(&gdev->session_mutex);
+
+ return ret;
+}
+
+static int vbg_ioctl_hgcm_disconnect(struct vbg_dev *gdev,
+ struct vbg_session *session,
+ struct vbg_ioctl_hgcm_disconnect *disconn)
+{
+ u32 client_id;
+ int i, ret;
+
+ if (vbg_ioctl_chk(&disconn->hdr, sizeof(disconn->u.in), 0))
+ return -EINVAL;
+
+ client_id = disconn->u.in.client_id;
+ if (client_id == 0 || client_id == U32_MAX)
+ return -EINVAL;
+
+ mutex_lock(&gdev->session_mutex);
+ for (i = 0; i < ARRAY_SIZE(session->hgcm_client_ids); i++) {
+ if (session->hgcm_client_ids[i] == client_id) {
+ session->hgcm_client_ids[i] = U32_MAX;
+ break;
+ }
+ }
+ mutex_unlock(&gdev->session_mutex);
+
+ if (i >= ARRAY_SIZE(session->hgcm_client_ids))
+ return -EINVAL;
+
+ ret = vbg_hgcm_disconnect(gdev, client_id, &disconn->hdr.rc);
+
+ mutex_lock(&gdev->session_mutex);
+ if (ret == 0 && disconn->hdr.rc >= 0)
+ session->hgcm_client_ids[i] = 0;
+ else
+ session->hgcm_client_ids[i] = client_id;
+ mutex_unlock(&gdev->session_mutex);
+
+ return ret;
+}
+
+static int vbg_ioctl_hgcm_call(struct vbg_dev *gdev,
+ struct vbg_session *session, bool f32bit,
+ struct vbg_ioctl_hgcm_call *call)
+{
+ size_t actual_size;
+ u32 client_id;
+ int i, ret;
+
+ if (call->hdr.size_in < sizeof(*call))
+ return -EINVAL;
+
+ if (call->hdr.size_in != call->hdr.size_out)
+ return -EINVAL;
+
+ if (call->parm_count > VMMDEV_HGCM_MAX_PARMS)
+ return -E2BIG;
+
+ client_id = call->client_id;
+ if (client_id == 0 || client_id == U32_MAX)
+ return -EINVAL;
+
+ actual_size = sizeof(*call);
+ if (f32bit)
+ actual_size += call->parm_count *
+ sizeof(struct vmmdev_hgcm_function_parameter32);
+ else
+ actual_size += call->parm_count *
+ sizeof(struct vmmdev_hgcm_function_parameter);
+ if (call->hdr.size_in < actual_size) {
+ vbg_debug("VBG_IOCTL_HGCM_CALL: hdr.size_in %d required size is %zd\n",
+ call->hdr.size_in, actual_size);
+ return -EINVAL;
+ }
+ call->hdr.size_out = actual_size;
+
+ /*
+ * Validate the client id.
+ */
+ mutex_lock(&gdev->session_mutex);
+ for (i = 0; i < ARRAY_SIZE(session->hgcm_client_ids); i++)
+ if (session->hgcm_client_ids[i] == client_id)
+ break;
+ mutex_unlock(&gdev->session_mutex);
+ if (i >= ARRAY_SIZE(session->hgcm_client_ids)) {
+ vbg_debug("VBG_IOCTL_HGCM_CALL: INVALID handle. u32Client=%#08x\n",
+ client_id);
+ return -EINVAL;
+ }
+
+ if (f32bit)
+ ret = vbg_hgcm_call32(gdev, client_id,
+ call->function, call->timeout_ms,
+ VBG_IOCTL_HGCM_CALL_PARMS32(call),
+ call->parm_count, &call->hdr.rc);
+ else
+ ret = vbg_hgcm_call(gdev, client_id,
+ call->function, call->timeout_ms,
+ VBG_IOCTL_HGCM_CALL_PARMS(call),
+ call->parm_count, &call->hdr.rc);
+
+ if (ret == -E2BIG) {
+ /* E2BIG needs to be reported through the hdr.rc field. */
+ call->hdr.rc = VERR_OUT_OF_RANGE;
+ ret = 0;
+ }
+
+ if (ret && ret != -EINTR && ret != -ETIMEDOUT)
+ vbg_err("VBG_IOCTL_HGCM_CALL error: %d\n", ret);
+
+ return ret;
+}
+
+static int vbg_ioctl_log(struct vbg_ioctl_log *log)
+{
+ if (log->hdr.size_out != sizeof(log->hdr))
+ return -EINVAL;
+
+ vbg_info("%.*s", (int)(log->hdr.size_in - sizeof(log->hdr)),
+ log->u.in.msg);
+
+ return 0;
+}
+
+static int vbg_ioctl_change_filter_mask(struct vbg_dev *gdev,
+ struct vbg_session *session,
+ struct vbg_ioctl_change_filter *filter)
+{
+ u32 or_mask, not_mask;
+
+ if (vbg_ioctl_chk(&filter->hdr, sizeof(filter->u.in), 0))
+ return -EINVAL;
+
+ or_mask = filter->u.in.or_mask;
+ not_mask = filter->u.in.not_mask;
+
+ if ((or_mask | not_mask) & ~VMMDEV_EVENT_VALID_EVENT_MASK)
+ return -EINVAL;
+
+ return vbg_set_session_event_filter(gdev, session, or_mask, not_mask,
+ false);
+}
+
+static int vbg_ioctl_change_guest_capabilities(struct vbg_dev *gdev,
+ struct vbg_session *session, struct vbg_ioctl_set_guest_caps *caps)
+{
+ u32 or_mask, not_mask;
+ int ret;
+
+ if (vbg_ioctl_chk(&caps->hdr, sizeof(caps->u.in), sizeof(caps->u.out)))
+ return -EINVAL;
+
+ or_mask = caps->u.in.or_mask;
+ not_mask = caps->u.in.not_mask;
+
+ if ((or_mask | not_mask) & ~VMMDEV_EVENT_VALID_EVENT_MASK)
+ return -EINVAL;
+
+ ret = vbg_set_session_capabilities(gdev, session, or_mask, not_mask,
+ false);
+ if (ret)
+ return ret;
+
+ caps->u.out.session_caps = session->guest_caps;
+ caps->u.out.global_caps = gdev->guest_caps_host;
+
+ return 0;
+}
+
+static int vbg_ioctl_check_balloon(struct vbg_dev *gdev,
+ struct vbg_ioctl_check_balloon *balloon_info)
+{
+ if (vbg_ioctl_chk(&balloon_info->hdr, 0, sizeof(balloon_info->u.out)))
+ return -EINVAL;
+
+ balloon_info->u.out.balloon_chunks = gdev->mem_balloon.chunks;
+ /*
+ * Under Linux we handle VMMDEV_EVENT_BALLOON_CHANGE_REQUEST
+ * events entirely in the kernel, see vbg_core_isr().
+ */
+ balloon_info->u.out.handle_in_r3 = false;
+
+ return 0;
+}
+
+static int vbg_ioctl_write_core_dump(struct vbg_dev *gdev,
+ struct vbg_ioctl_write_coredump *dump)
+{
+ struct vmmdev_write_core_dump *req;
+
+ if (vbg_ioctl_chk(&dump->hdr, sizeof(dump->u.in), 0))
+ return -EINVAL;
+
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_WRITE_COREDUMP);
+ if (!req)
+ return -ENOMEM;
+
+ req->flags = dump->u.in.flags;
+ dump->hdr.rc = vbg_req_perform(gdev, req);
+
+ vbg_req_free(req, sizeof(*req));
+ return 0;
+}
+
+/**
+ * Common IOCtl for user to kernel communication.
+ * Return: 0 or negative errno value.
+ * @session: The client session.
+ * @req: The requested function.
+ * @data: The i/o data buffer, minimum size sizeof(struct vbg_ioctl_hdr).
+ */
+int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data)
+{
+ unsigned int req_no_size = req & ~IOCSIZE_MASK;
+ struct vbg_dev *gdev = session->gdev;
+ struct vbg_ioctl_hdr *hdr = data;
+ bool f32bit = false;
+
+ hdr->rc = VINF_SUCCESS;
+ if (!hdr->size_out)
+ hdr->size_out = hdr->size_in;
+
+ /*
+ * hdr->version and hdr->size_in / hdr->size_out minimum size are
+ * already checked by vbg_misc_device_ioctl().
+ */
+
+ /* For VMMDEV_REQUEST hdr->type != VBG_IOCTL_HDR_TYPE_DEFAULT */
+ if (req_no_size == VBG_IOCTL_VMMDEV_REQUEST(0) ||
+ req == VBG_IOCTL_VMMDEV_REQUEST_BIG)
+ return vbg_ioctl_vmmrequest(gdev, session, data);
+
+ if (hdr->type != VBG_IOCTL_HDR_TYPE_DEFAULT)
+ return -EINVAL;
+
+ /* Fixed size requests. */
+ switch (req) {
+ case VBG_IOCTL_DRIVER_VERSION_INFO:
+ return vbg_ioctl_driver_version_info(data);
+ case VBG_IOCTL_HGCM_CONNECT:
+ return vbg_ioctl_hgcm_connect(gdev, session, data);
+ case VBG_IOCTL_HGCM_DISCONNECT:
+ return vbg_ioctl_hgcm_disconnect(gdev, session, data);
+ case VBG_IOCTL_WAIT_FOR_EVENTS:
+ return vbg_ioctl_wait_for_events(gdev, session, data);
+ case VBG_IOCTL_INTERRUPT_ALL_WAIT_FOR_EVENTS:
+ return vbg_ioctl_interrupt_all_wait_events(gdev, session, data);
+ case VBG_IOCTL_CHANGE_FILTER_MASK:
+ return vbg_ioctl_change_filter_mask(gdev, session, data);
+ case VBG_IOCTL_CHANGE_GUEST_CAPABILITIES:
+ return vbg_ioctl_change_guest_capabilities(gdev, session, data);
+ case VBG_IOCTL_CHECK_BALLOON:
+ return vbg_ioctl_check_balloon(gdev, data);
+ case VBG_IOCTL_WRITE_CORE_DUMP:
+ return vbg_ioctl_write_core_dump(gdev, data);
+ }
+
+ /* Variable sized requests. */
+ switch (req_no_size) {
+#ifdef CONFIG_COMPAT
+ case VBG_IOCTL_HGCM_CALL_32(0):
+ f32bit = true;
+ /* Fall through */
+#endif
+ case VBG_IOCTL_HGCM_CALL(0):
+ return vbg_ioctl_hgcm_call(gdev, session, f32bit, data);
+ case VBG_IOCTL_LOG(0):
+ return vbg_ioctl_log(data);
+ }
+
+ vbg_debug("VGDrvCommonIoCtl: Unknown req %#08x\n", req);
+ return -ENOTTY;
+}
+
+/**
+ * Report guest supported mouse-features to the host.
+ *
+ * Return: 0 or negative errno value.
+ * @gdev: The Guest extension device.
+ * @features: The set of features to report to the host.
+ */
+int vbg_core_set_mouse_status(struct vbg_dev *gdev, u32 features)
+{
+ struct vmmdev_mouse_status *req;
+ int rc;
+
+ req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_SET_MOUSE_STATUS);
+ if (!req)
+ return -ENOMEM;
+
+ req->mouse_features = features;
+ req->pointer_pos_x = 0;
+ req->pointer_pos_y = 0;
+
+ rc = vbg_req_perform(gdev, req);
+ if (rc < 0)
+ vbg_err("%s error, rc: %d\n", __func__, rc);
+
+ vbg_req_free(req, sizeof(*req));
+ return vbg_status_code_to_errno(rc);
+}
+
+/** Core interrupt service routine. */
+irqreturn_t vbg_core_isr(int irq, void *dev_id)
+{
+ struct vbg_dev *gdev = dev_id;
+ struct vmmdev_events *req = gdev->ack_events_req;
+ bool mouse_position_changed = false;
+ unsigned long flags;
+ u32 events = 0;
+ int rc;
+
+ if (!gdev->mmio->V.V1_04.have_events)
+ return IRQ_NONE;
+
+ /* Get and acknowlegde events. */
+ req->header.rc = VERR_INTERNAL_ERROR;
+ req->events = 0;
+ rc = vbg_req_perform(gdev, req);
+ if (rc < 0) {
+ vbg_err("Error performing events req, rc: %d\n", rc);
+ return IRQ_NONE;
+ }
+
+ events = req->events;
+
+ if (events & VMMDEV_EVENT_MOUSE_POSITION_CHANGED) {
+ mouse_position_changed = true;
+ events &= ~VMMDEV_EVENT_MOUSE_POSITION_CHANGED;
+ }
+
+ if (events & VMMDEV_EVENT_HGCM) {
+ wake_up(&gdev->hgcm_wq);
+ events &= ~VMMDEV_EVENT_HGCM;
+ }
+
+ if (events & VMMDEV_EVENT_BALLOON_CHANGE_REQUEST) {
+ schedule_work(&gdev->mem_balloon.work);
+ events &= ~VMMDEV_EVENT_BALLOON_CHANGE_REQUEST;
+ }
+
+ if (events) {
+ spin_lock_irqsave(&gdev->event_spinlock, flags);
+ gdev->pending_events |= events;
+ spin_unlock_irqrestore(&gdev->event_spinlock, flags);
+
+ wake_up(&gdev->event_wq);
+ }
+
+ if (mouse_position_changed)
+ vbg_linux_mouse_event(gdev);
+
+ return IRQ_HANDLED;
+}
diff --git a/drivers/virt/vboxguest/vboxguest_core.h b/drivers/virt/vboxguest/vboxguest_core.h
new file mode 100644
index 0000000..7ad9ec4
--- /dev/null
+++ b/drivers/virt/vboxguest/vboxguest_core.h
@@ -0,0 +1,183 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */
+/* Copyright (C) 2010-2016 Oracle Corporation */
+
+#ifndef __VBOXGUEST_CORE_H__
+#define __VBOXGUEST_CORE_H__
+
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/miscdevice.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+#include <linux/vboxguest.h>
+#include "vmmdev.h"
+
+struct vbg_session;
+
+/** VBox guest memory balloon. */
+struct vbg_mem_balloon {
+ /** Work handling VMMDEV_EVENT_BALLOON_CHANGE_REQUEST events */
+ struct work_struct work;
+ /** Pre-allocated vmmdev_memballoon_info req for query */
+ struct vmmdev_memballoon_info *get_req;
+ /** Pre-allocated vmmdev_memballoon_change req for inflate / deflate */
+ struct vmmdev_memballoon_change *change_req;
+ /** The current number of chunks in the balloon. */
+ u32 chunks;
+ /** The maximum number of chunks in the balloon. */
+ u32 max_chunks;
+ /**
+ * Array of pointers to page arrays. A page * array is allocated for
+ * each chunk when inflating, and freed when the deflating.
+ */
+ struct page ***pages;
+};
+
+/**
+ * Per bit usage tracker for a u32 mask.
+ *
+ * Used for optimal handling of guest properties and event filter.
+ */
+struct vbg_bit_usage_tracker {
+ /** Per bit usage counters. */
+ u32 per_bit_usage[32];
+ /** The current mask according to per_bit_usage. */
+ u32 mask;
+};
+
+/** VBox guest device (data) extension. */
+struct vbg_dev {
+ struct device *dev;
+ /** The base of the adapter I/O ports. */
+ u16 io_port;
+ /** Pointer to the mapping of the VMMDev adapter memory. */
+ struct vmmdev_memory *mmio;
+ /** Host version */
+ char host_version[64];
+ /** Host features */
+ unsigned int host_features;
+ /**
+ * Dummy page and vmap address for reserved kernel virtual-address
+ * space for the guest mappings, only used on hosts lacking vtx.
+ */
+ struct page *guest_mappings_dummy_page;
+ void *guest_mappings;
+ /** Spinlock protecting pending_events. */
+ spinlock_t event_spinlock;
+ /** Preallocated struct vmmdev_events for the IRQ handler. */
+ struct vmmdev_events *ack_events_req;
+ /** Wait-for-event list for threads waiting for multiple events. */
+ wait_queue_head_t event_wq;
+ /** Mask of pending events. */
+ u32 pending_events;
+ /** Wait-for-event list for threads waiting on HGCM async completion. */
+ wait_queue_head_t hgcm_wq;
+ /** Pre-allocated hgcm cancel2 req. for cancellation on timeout */
+ struct vmmdev_hgcm_cancel2 *cancel_req;
+ /** Mutex protecting cancel_req accesses */
+ struct mutex cancel_req_mutex;
+ /** Pre-allocated mouse-status request for the input-device handling. */
+ struct vmmdev_mouse_status *mouse_status_req;
+ /** Input device for reporting abs mouse coordinates to the guest. */
+ struct input_dev *input;
+
+ /** Memory balloon information. */
+ struct vbg_mem_balloon mem_balloon;
+
+ /** Lock for session related items in vbg_dev and vbg_session */
+ struct mutex session_mutex;
+ /** Events we won't permit anyone to filter out. */
+ u32 fixed_events;
+ /**
+ * Usage counters for the host events (excludes fixed events),
+ * Protected by session_mutex.
+ */
+ struct vbg_bit_usage_tracker event_filter_tracker;
+ /**
+ * The event filter last reported to the host (or UINT32_MAX).
+ * Protected by session_mutex.
+ */
+ u32 event_filter_host;
+
+ /**
+ * Usage counters for guest capabilities. Indexed by capability bit
+ * number, one count per session using a capability.
+ * Protected by session_mutex.
+ */
+ struct vbg_bit_usage_tracker guest_caps_tracker;
+ /**
+ * The guest capabilities last reported to the host (or UINT32_MAX).
+ * Protected by session_mutex.
+ */
+ u32 guest_caps_host;
+
+ /**
+ * Heartbeat timer which fires with interval
+ * cNsHearbeatInterval and its handler sends
+ * VMMDEVREQ_GUEST_HEARTBEAT to VMMDev.
+ */
+ struct timer_list heartbeat_timer;
+ /** Heartbeat timer interval in ms. */
+ int heartbeat_interval_ms;
+ /** Preallocated VMMDEVREQ_GUEST_HEARTBEAT request. */
+ struct vmmdev_request_header *guest_heartbeat_req;
+
+ /** "vboxguest" char-device */
+ struct miscdevice misc_device;
+ /** "vboxuser" char-device */
+ struct miscdevice misc_device_user;
+};
+
+/** The VBoxGuest per session data. */
+struct vbg_session {
+ /** Pointer to the device extension. */
+ struct vbg_dev *gdev;
+
+ /**
+ * Array containing HGCM client IDs associated with this session.
+ * These will be automatically disconnected when the session is closed.
+ * Protected by vbg_gdev.session_mutex.
+ */
+ u32 hgcm_client_ids[64];
+ /**
+ * Host events requested by the session.
+ * An event type requested in any guest session will be added to the
+ * host filter. Protected by vbg_gdev.session_mutex.
+ */
+ u32 event_filter;
+ /**
+ * Guest capabilities for this session.
+ * A capability claimed by any guest session will be reported to the
+ * host. Protected by vbg_gdev.session_mutex.
+ */
+ u32 guest_caps;
+ /** Does this session belong to a root process or a user one? */
+ bool user_session;
+ /** Set on CANCEL_ALL_WAITEVENTS, protected by vbg_devevent_spinlock. */
+ bool cancel_waiters;
+};
+
+int vbg_core_init(struct vbg_dev *gdev, u32 fixed_events);
+void vbg_core_exit(struct vbg_dev *gdev);
+struct vbg_session *vbg_core_open_session(struct vbg_dev *gdev, bool user);
+void vbg_core_close_session(struct vbg_session *session);
+int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data);
+int vbg_core_set_mouse_status(struct vbg_dev *gdev, u32 features);
+
+irqreturn_t vbg_core_isr(int irq, void *dev_id);
+
+void vbg_linux_mouse_event(struct vbg_dev *gdev);
+
+/* Private (non exported) functions form vboxguest_utils.c */
+void *vbg_req_alloc(size_t len, enum vmmdev_request_type req_type);
+void vbg_req_free(void *req, size_t len);
+int vbg_req_perform(struct vbg_dev *gdev, void *req);
+int vbg_hgcm_call32(
+ struct vbg_dev *gdev, u32 client_id, u32 function, u32 timeout_ms,
+ struct vmmdev_hgcm_function_parameter32 *parm32, u32 parm_count,
+ int *vbox_status);
+
+#endif
diff --git a/drivers/virt/vboxguest/vboxguest_linux.c b/drivers/virt/vboxguest/vboxguest_linux.c
new file mode 100644
index 0000000..6e2a961
--- /dev/null
+++ b/drivers/virt/vboxguest/vboxguest_linux.c
@@ -0,0 +1,481 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * vboxguest linux pci driver, char-dev and input-device code,
+ *
+ * Copyright (C) 2006-2016 Oracle Corporation
+ */
+
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/poll.h>
+#include <linux/vbox_utils.h>
+#include "vboxguest_core.h"
+
+/** The device name. */
+#define DEVICE_NAME "vboxguest"
+/** The device name for the device node open to everyone. */
+#define DEVICE_NAME_USER "vboxuser"
+/** VirtualBox PCI vendor ID. */
+#define VBOX_VENDORID 0x80ee
+/** VMMDev PCI card product ID. */
+#define VMMDEV_DEVICEID 0xcafe
+
+/** Mutex protecting the global vbg_gdev pointer used by vbg_get/put_gdev. */
+static DEFINE_MUTEX(vbg_gdev_mutex);
+/** Global vbg_gdev pointer used by vbg_get/put_gdev. */
+static struct vbg_dev *vbg_gdev;
+
+static int vbg_misc_device_open(struct inode *inode, struct file *filp)
+{
+ struct vbg_session *session;
+ struct vbg_dev *gdev;
+
+ /* misc_open sets filp->private_data to our misc device */
+ gdev = container_of(filp->private_data, struct vbg_dev, misc_device);
+
+ session = vbg_core_open_session(gdev, false);
+ if (IS_ERR(session))
+ return PTR_ERR(session);
+
+ filp->private_data = session;
+ return 0;
+}
+
+static int vbg_misc_device_user_open(struct inode *inode, struct file *filp)
+{
+ struct vbg_session *session;
+ struct vbg_dev *gdev;
+
+ /* misc_open sets filp->private_data to our misc device */
+ gdev = container_of(filp->private_data, struct vbg_dev,
+ misc_device_user);
+
+ session = vbg_core_open_session(gdev, false);
+ if (IS_ERR(session))
+ return PTR_ERR(session);
+
+ filp->private_data = session;
+ return 0;
+}
+
+/**
+ * Close device.
+ * Return: 0 on success, negated errno on failure.
+ * @inode: Pointer to inode info structure.
+ * @filp: Associated file pointer.
+ */
+static int vbg_misc_device_close(struct inode *inode, struct file *filp)
+{
+ vbg_core_close_session(filp->private_data);
+ filp->private_data = NULL;
+ return 0;
+}
+
+/**
+ * Device I/O Control entry point.
+ * Return: 0 on success, negated errno on failure.
+ * @filp: Associated file pointer.
+ * @req: The request specified to ioctl().
+ * @arg: The argument specified to ioctl().
+ */
+static long vbg_misc_device_ioctl(struct file *filp, unsigned int req,
+ unsigned long arg)
+{
+ struct vbg_session *session = filp->private_data;
+ size_t returned_size, size;
+ struct vbg_ioctl_hdr hdr;
+ bool is_vmmdev_req;
+ int ret = 0;
+ void *buf;
+
+ if (copy_from_user(&hdr, (void *)arg, sizeof(hdr)))
+ return -EFAULT;
+
+ if (hdr.version != VBG_IOCTL_HDR_VERSION)
+ return -EINVAL;
+
+ if (hdr.size_in < sizeof(hdr) ||
+ (hdr.size_out && hdr.size_out < sizeof(hdr)))
+ return -EINVAL;
+
+ size = max(hdr.size_in, hdr.size_out);
+ if (_IOC_SIZE(req) && _IOC_SIZE(req) != size)
+ return -EINVAL;
+ if (size > SZ_16M)
+ return -E2BIG;
+
+ /*
+ * IOCTL_VMMDEV_REQUEST needs the buffer to be below 4G to avoid
+ * the need for a bounce-buffer and another copy later on.
+ */
+ is_vmmdev_req = (req & ~IOCSIZE_MASK) == VBG_IOCTL_VMMDEV_REQUEST(0) ||
+ req == VBG_IOCTL_VMMDEV_REQUEST_BIG;
+
+ if (is_vmmdev_req)
+ buf = vbg_req_alloc(size, VBG_IOCTL_HDR_TYPE_DEFAULT);
+ else
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ *((struct vbg_ioctl_hdr *)buf) = hdr;
+ if (copy_from_user(buf + sizeof(hdr), (void *)arg + sizeof(hdr),
+ hdr.size_in - sizeof(hdr))) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (hdr.size_in < size)
+ memset(buf + hdr.size_in, 0, size - hdr.size_in);
+
+ ret = vbg_core_ioctl(session, req, buf);
+ if (ret)
+ goto out;
+
+ returned_size = ((struct vbg_ioctl_hdr *)buf)->size_out;
+ if (returned_size > size) {
+ vbg_debug("%s: too much output data %zu > %zu\n",
+ __func__, returned_size, size);
+ returned_size = size;
+ }
+ if (copy_to_user((void *)arg, buf, returned_size) != 0)
+ ret = -EFAULT;
+
+out:
+ if (is_vmmdev_req)
+ vbg_req_free(buf, size);
+ else
+ kfree(buf);
+
+ return ret;
+}
+
+/** The file_operations structures. */
+static const struct file_operations vbg_misc_device_fops = {
+ .owner = THIS_MODULE,
+ .open = vbg_misc_device_open,
+ .release = vbg_misc_device_close,
+ .unlocked_ioctl = vbg_misc_device_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = vbg_misc_device_ioctl,
+#endif
+};
+static const struct file_operations vbg_misc_device_user_fops = {
+ .owner = THIS_MODULE,
+ .open = vbg_misc_device_user_open,
+ .release = vbg_misc_device_close,
+ .unlocked_ioctl = vbg_misc_device_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = vbg_misc_device_ioctl,
+#endif
+};
+
+/**
+ * Called when the input device is first opened.
+ *
+ * Sets up absolute mouse reporting.
+ */
+static int vbg_input_open(struct input_dev *input)
+{
+ struct vbg_dev *gdev = input_get_drvdata(input);
+ u32 feat = VMMDEV_MOUSE_GUEST_CAN_ABSOLUTE | VMMDEV_MOUSE_NEW_PROTOCOL;
+ int ret;
+
+ ret = vbg_core_set_mouse_status(gdev, feat);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+/**
+ * Called if all open handles to the input device are closed.
+ *
+ * Disables absolute reporting.
+ */
+static void vbg_input_close(struct input_dev *input)
+{
+ struct vbg_dev *gdev = input_get_drvdata(input);
+
+ vbg_core_set_mouse_status(gdev, 0);
+}
+
+/**
+ * Creates the kernel input device.
+ *
+ * Return: 0 on success, negated errno on failure.
+ */
+static int vbg_create_input_device(struct vbg_dev *gdev)
+{
+ struct input_dev *input;
+
+ input = devm_input_allocate_device(gdev->dev);
+ if (!input)
+ return -ENOMEM;
+
+ input->id.bustype = BUS_PCI;
+ input->id.vendor = VBOX_VENDORID;
+ input->id.product = VMMDEV_DEVICEID;
+ input->open = vbg_input_open;
+ input->close = vbg_input_close;
+ input->dev.parent = gdev->dev;
+ input->name = "VirtualBox mouse integration";
+
+ input_set_abs_params(input, ABS_X, VMMDEV_MOUSE_RANGE_MIN,
+ VMMDEV_MOUSE_RANGE_MAX, 0, 0);
+ input_set_abs_params(input, ABS_Y, VMMDEV_MOUSE_RANGE_MIN,
+ VMMDEV_MOUSE_RANGE_MAX, 0, 0);
+ input_set_capability(input, EV_KEY, BTN_MOUSE);
+ input_set_drvdata(input, gdev);
+
+ gdev->input = input;
+
+ return input_register_device(gdev->input);
+}
+
+static ssize_t host_version_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct vbg_dev *gdev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", gdev->host_version);
+}
+
+static ssize_t host_features_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct vbg_dev *gdev = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%#x\n", gdev->host_features);
+}
+
+static DEVICE_ATTR_RO(host_version);
+static DEVICE_ATTR_RO(host_features);
+
+/**
+ * Does the PCI detection and init of the device.
+ *
+ * Return: 0 on success, negated errno on failure.
+ */
+static int vbg_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
+{
+ struct device *dev = &pci->dev;
+ resource_size_t io, io_len, mmio, mmio_len;
+ struct vmmdev_memory *vmmdev;
+ struct vbg_dev *gdev;
+ int ret;
+
+ gdev = devm_kzalloc(dev, sizeof(*gdev), GFP_KERNEL);
+ if (!gdev)
+ return -ENOMEM;
+
+ ret = pci_enable_device(pci);
+ if (ret != 0) {
+ vbg_err("vboxguest: Error enabling device: %d\n", ret);
+ return ret;
+ }
+
+ ret = -ENODEV;
+
+ io = pci_resource_start(pci, 0);
+ io_len = pci_resource_len(pci, 0);
+ if (!io || !io_len) {
+ vbg_err("vboxguest: Error IO-port resource (0) is missing\n");
+ goto err_disable_pcidev;
+ }
+ if (devm_request_region(dev, io, io_len, DEVICE_NAME) == NULL) {
+ vbg_err("vboxguest: Error could not claim IO resource\n");
+ ret = -EBUSY;
+ goto err_disable_pcidev;
+ }
+
+ mmio = pci_resource_start(pci, 1);
+ mmio_len = pci_resource_len(pci, 1);
+ if (!mmio || !mmio_len) {
+ vbg_err("vboxguest: Error MMIO resource (1) is missing\n");
+ goto err_disable_pcidev;
+ }
+
+ if (devm_request_mem_region(dev, mmio, mmio_len, DEVICE_NAME) == NULL) {
+ vbg_err("vboxguest: Error could not claim MMIO resource\n");
+ ret = -EBUSY;
+ goto err_disable_pcidev;
+ }
+
+ vmmdev = devm_ioremap(dev, mmio, mmio_len);
+ if (!vmmdev) {
+ vbg_err("vboxguest: Error ioremap failed; MMIO addr=%pap size=%pap\n",
+ &mmio, &mmio_len);
+ goto err_disable_pcidev;
+ }
+
+ /* Validate MMIO region version and size. */
+ if (vmmdev->version != VMMDEV_MEMORY_VERSION ||
+ vmmdev->size < 32 || vmmdev->size > mmio_len) {
+ vbg_err("vboxguest: Bogus VMMDev memory; version=%08x (expected %08x) size=%d (expected <= %d)\n",
+ vmmdev->version, VMMDEV_MEMORY_VERSION,
+ vmmdev->size, (int)mmio_len);
+ goto err_disable_pcidev;
+ }
+
+ gdev->io_port = io;
+ gdev->mmio = vmmdev;
+ gdev->dev = dev;
+ gdev->misc_device.minor = MISC_DYNAMIC_MINOR;
+ gdev->misc_device.name = DEVICE_NAME;
+ gdev->misc_device.fops = &vbg_misc_device_fops;
+ gdev->misc_device_user.minor = MISC_DYNAMIC_MINOR;
+ gdev->misc_device_user.name = DEVICE_NAME_USER;
+ gdev->misc_device_user.fops = &vbg_misc_device_user_fops;
+
+ ret = vbg_core_init(gdev, VMMDEV_EVENT_MOUSE_POSITION_CHANGED);
+ if (ret)
+ goto err_disable_pcidev;
+
+ ret = vbg_create_input_device(gdev);
+ if (ret) {
+ vbg_err("vboxguest: Error creating input device: %d\n", ret);
+ goto err_vbg_core_exit;
+ }
+
+ ret = devm_request_irq(dev, pci->irq, vbg_core_isr, IRQF_SHARED,
+ DEVICE_NAME, gdev);
+ if (ret) {
+ vbg_err("vboxguest: Error requesting irq: %d\n", ret);
+ goto err_vbg_core_exit;
+ }
+
+ ret = misc_register(&gdev->misc_device);
+ if (ret) {
+ vbg_err("vboxguest: Error misc_register %s failed: %d\n",
+ DEVICE_NAME, ret);
+ goto err_vbg_core_exit;
+ }
+
+ ret = misc_register(&gdev->misc_device_user);
+ if (ret) {
+ vbg_err("vboxguest: Error misc_register %s failed: %d\n",
+ DEVICE_NAME_USER, ret);
+ goto err_unregister_misc_device;
+ }
+
+ mutex_lock(&vbg_gdev_mutex);
+ if (!vbg_gdev)
+ vbg_gdev = gdev;
+ else
+ ret = -EBUSY;
+ mutex_unlock(&vbg_gdev_mutex);
+
+ if (ret) {
+ vbg_err("vboxguest: Error more then 1 vbox guest pci device\n");
+ goto err_unregister_misc_device_user;
+ }
+
+ pci_set_drvdata(pci, gdev);
+ device_create_file(dev, &dev_attr_host_version);
+ device_create_file(dev, &dev_attr_host_features);
+
+ vbg_info("vboxguest: misc device minor %d, IRQ %d, I/O port %x, MMIO at %pap (size %pap)\n",
+ gdev->misc_device.minor, pci->irq, gdev->io_port,
+ &mmio, &mmio_len);
+
+ return 0;
+
+err_unregister_misc_device_user:
+ misc_deregister(&gdev->misc_device_user);
+err_unregister_misc_device:
+ misc_deregister(&gdev->misc_device);
+err_vbg_core_exit:
+ vbg_core_exit(gdev);
+err_disable_pcidev:
+ pci_disable_device(pci);
+
+ return ret;
+}
+
+static void vbg_pci_remove(struct pci_dev *pci)
+{
+ struct vbg_dev *gdev = pci_get_drvdata(pci);
+
+ mutex_lock(&vbg_gdev_mutex);
+ vbg_gdev = NULL;
+ mutex_unlock(&vbg_gdev_mutex);
+
+ device_remove_file(gdev->dev, &dev_attr_host_features);
+ device_remove_file(gdev->dev, &dev_attr_host_version);
+ misc_deregister(&gdev->misc_device_user);
+ misc_deregister(&gdev->misc_device);
+ vbg_core_exit(gdev);
+ pci_disable_device(pci);
+}
+
+struct vbg_dev *vbg_get_gdev(void)
+{
+ mutex_lock(&vbg_gdev_mutex);
+
+ /*
+ * Note on success we keep the mutex locked until vbg_put_gdev(),
+ * this stops vbg_pci_remove from removing the device from underneath
+ * vboxsf. vboxsf will only hold a reference for a short while.
+ */
+ if (vbg_gdev)
+ return vbg_gdev;
+
+ mutex_unlock(&vbg_gdev_mutex);
+ return ERR_PTR(-ENODEV);
+}
+EXPORT_SYMBOL(vbg_get_gdev);
+
+void vbg_put_gdev(struct vbg_dev *gdev)
+{
+ WARN_ON(gdev != vbg_gdev);
+ mutex_unlock(&vbg_gdev_mutex);
+}
+EXPORT_SYMBOL(vbg_put_gdev);
+
+/**
+ * Callback for mouse events.
+ *
+ * This is called at the end of the ISR, after leaving the event spinlock, if
+ * VMMDEV_EVENT_MOUSE_POSITION_CHANGED was raised by the host.
+ *
+ * @gdev: The device extension.
+ */
+void vbg_linux_mouse_event(struct vbg_dev *gdev)
+{
+ int rc;
+
+ /* Report events to the kernel input device */
+ gdev->mouse_status_req->mouse_features = 0;
+ gdev->mouse_status_req->pointer_pos_x = 0;
+ gdev->mouse_status_req->pointer_pos_y = 0;
+ rc = vbg_req_perform(gdev, gdev->mouse_status_req);
+ if (rc >= 0) {
+ input_report_abs(gdev->input, ABS_X,
+ gdev->mouse_status_req->pointer_pos_x);
+ input_report_abs(gdev->input, ABS_Y,
+ gdev->mouse_status_req->pointer_pos_y);
+ input_sync(gdev->input);
+ }
+}
+
+static const struct pci_device_id vbg_pci_ids[] = {
+ { .vendor = VBOX_VENDORID, .device = VMMDEV_DEVICEID },
+ {}
+};
+MODULE_DEVICE_TABLE(pci, vbg_pci_ids);
+
+static struct pci_driver vbg_pci_driver = {
+ .name = DEVICE_NAME,
+ .id_table = vbg_pci_ids,
+ .probe = vbg_pci_probe,
+ .remove = vbg_pci_remove,
+};
+
+module_pci_driver(vbg_pci_driver);
+
+MODULE_AUTHOR("Oracle Corporation");
+MODULE_DESCRIPTION("Oracle VM VirtualBox Guest Additions for Linux Module");
+MODULE_LICENSE("GPL");
diff --git a/drivers/virt/vboxguest/vboxguest_utils.c b/drivers/virt/vboxguest/vboxguest_utils.c
new file mode 100644
index 0000000..bf44742
--- /dev/null
+++ b/drivers/virt/vboxguest/vboxguest_utils.c
@@ -0,0 +1,812 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */
+/*
+ * vboxguest vmm-req and hgcm-call code, VBoxGuestR0LibHGCMInternal.cpp,
+ * VBoxGuestR0LibGenericRequest.cpp and RTErrConvertToErrno.cpp in vbox svn.
+ *
+ * Copyright (C) 2006-2016 Oracle Corporation
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+#include <linux/vbox_err.h>
+#include <linux/vbox_utils.h>
+#include "vboxguest_core.h"
+
+/* Get the pointer to the first parameter of a HGCM call request. */
+#define VMMDEV_HGCM_CALL_PARMS(a) \
+ ((struct vmmdev_hgcm_function_parameter *)( \
+ (u8 *)(a) + sizeof(struct vmmdev_hgcm_call)))
+
+/* The max parameter buffer size for a user request. */
+#define VBG_MAX_HGCM_USER_PARM (24 * SZ_1M)
+/* The max parameter buffer size for a kernel request. */
+#define VBG_MAX_HGCM_KERNEL_PARM (16 * SZ_1M)
+
+#define VBG_DEBUG_PORT 0x504
+
+/* This protects vbg_log_buf and serializes VBG_DEBUG_PORT accesses */
+static DEFINE_SPINLOCK(vbg_log_lock);
+static char vbg_log_buf[128];
+
+#define VBG_LOG(name, pr_func) \
+void name(const char *fmt, ...) \
+{ \
+ unsigned long flags; \
+ va_list args; \
+ int i, count; \
+ \
+ va_start(args, fmt); \
+ spin_lock_irqsave(&vbg_log_lock, flags); \
+ \
+ count = vscnprintf(vbg_log_buf, sizeof(vbg_log_buf), fmt, args);\
+ for (i = 0; i < count; i++) \
+ outb(vbg_log_buf[i], VBG_DEBUG_PORT); \
+ \
+ pr_func("%s", vbg_log_buf); \
+ \
+ spin_unlock_irqrestore(&vbg_log_lock, flags); \
+ va_end(args); \
+} \
+EXPORT_SYMBOL(name)
+
+VBG_LOG(vbg_info, pr_info);
+VBG_LOG(vbg_warn, pr_warn);
+VBG_LOG(vbg_err, pr_err);
+#if defined(DEBUG) && !defined(CONFIG_DYNAMIC_DEBUG)
+VBG_LOG(vbg_debug, pr_debug);
+#endif
+
+void *vbg_req_alloc(size_t len, enum vmmdev_request_type req_type)
+{
+ struct vmmdev_request_header *req;
+ int order = get_order(PAGE_ALIGN(len));
+
+ req = (void *)__get_free_pages(GFP_KERNEL | GFP_DMA32, order);
+ if (!req)
+ return NULL;
+
+ memset(req, 0xaa, len);
+
+ req->size = len;
+ req->version = VMMDEV_REQUEST_HEADER_VERSION;
+ req->request_type = req_type;
+ req->rc = VERR_GENERAL_FAILURE;
+ req->reserved1 = 0;
+ req->reserved2 = 0;
+
+ return req;
+}
+
+void vbg_req_free(void *req, size_t len)
+{
+ if (!req)
+ return;
+
+ free_pages((unsigned long)req, get_order(PAGE_ALIGN(len)));
+}
+
+/* Note this function returns a VBox status code, not a negative errno!! */
+int vbg_req_perform(struct vbg_dev *gdev, void *req)
+{
+ unsigned long phys_req = virt_to_phys(req);
+
+ outl(phys_req, gdev->io_port + VMMDEV_PORT_OFF_REQUEST);
+ /*
+ * The host changes the request as a result of the outl, make sure
+ * the outl and any reads of the req happen in the correct order.
+ */
+ mb();
+
+ return ((struct vmmdev_request_header *)req)->rc;
+}
+
+static bool hgcm_req_done(struct vbg_dev *gdev,
+ struct vmmdev_hgcmreq_header *header)
+{
+ unsigned long flags;
+ bool done;
+
+ spin_lock_irqsave(&gdev->event_spinlock, flags);
+ done = header->flags & VMMDEV_HGCM_REQ_DONE;
+ spin_unlock_irqrestore(&gdev->event_spinlock, flags);
+
+ return done;
+}
+
+int vbg_hgcm_connect(struct vbg_dev *gdev,
+ struct vmmdev_hgcm_service_location *loc,
+ u32 *client_id, int *vbox_status)
+{
+ struct vmmdev_hgcm_connect *hgcm_connect = NULL;
+ int rc;
+
+ hgcm_connect = vbg_req_alloc(sizeof(*hgcm_connect),
+ VMMDEVREQ_HGCM_CONNECT);
+ if (!hgcm_connect)
+ return -ENOMEM;
+
+ hgcm_connect->header.flags = 0;
+ memcpy(&hgcm_connect->loc, loc, sizeof(*loc));
+ hgcm_connect->client_id = 0;
+
+ rc = vbg_req_perform(gdev, hgcm_connect);
+
+ if (rc == VINF_HGCM_ASYNC_EXECUTE)
+ wait_event(gdev->hgcm_wq,
+ hgcm_req_done(gdev, &hgcm_connect->header));
+
+ if (rc >= 0) {
+ *client_id = hgcm_connect->client_id;
+ rc = hgcm_connect->header.result;
+ }
+
+ vbg_req_free(hgcm_connect, sizeof(*hgcm_connect));
+
+ *vbox_status = rc;
+ return 0;
+}
+EXPORT_SYMBOL(vbg_hgcm_connect);
+
+int vbg_hgcm_disconnect(struct vbg_dev *gdev, u32 client_id, int *vbox_status)
+{
+ struct vmmdev_hgcm_disconnect *hgcm_disconnect = NULL;
+ int rc;
+
+ hgcm_disconnect = vbg_req_alloc(sizeof(*hgcm_disconnect),
+ VMMDEVREQ_HGCM_DISCONNECT);
+ if (!hgcm_disconnect)
+ return -ENOMEM;
+
+ hgcm_disconnect->header.flags = 0;
+ hgcm_disconnect->client_id = client_id;
+
+ rc = vbg_req_perform(gdev, hgcm_disconnect);
+
+ if (rc == VINF_HGCM_ASYNC_EXECUTE)
+ wait_event(gdev->hgcm_wq,
+ hgcm_req_done(gdev, &hgcm_disconnect->header));
+
+ if (rc >= 0)
+ rc = hgcm_disconnect->header.result;
+
+ vbg_req_free(hgcm_disconnect, sizeof(*hgcm_disconnect));
+
+ *vbox_status = rc;
+ return 0;
+}
+EXPORT_SYMBOL(vbg_hgcm_disconnect);
+
+static u32 hgcm_call_buf_size_in_pages(void *buf, u32 len)
+{
+ u32 size = PAGE_ALIGN(len + ((unsigned long)buf & ~PAGE_MASK));
+
+ return size >> PAGE_SHIFT;
+}
+
+static void hgcm_call_add_pagelist_size(void *buf, u32 len, size_t *extra)
+{
+ u32 page_count;
+
+ page_count = hgcm_call_buf_size_in_pages(buf, len);
+ *extra += offsetof(struct vmmdev_hgcm_pagelist, pages[page_count]);
+}
+
+static int hgcm_call_preprocess_linaddr(
+ const struct vmmdev_hgcm_function_parameter *src_parm,
+ void **bounce_buf_ret, size_t *extra)
+{
+ void *buf, *bounce_buf;
+ bool copy_in;
+ u32 len;
+ int ret;
+
+ buf = (void *)src_parm->u.pointer.u.linear_addr;
+ len = src_parm->u.pointer.size;
+ copy_in = src_parm->type != VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT;
+
+ if (len > VBG_MAX_HGCM_USER_PARM)
+ return -E2BIG;
+
+ bounce_buf = kvmalloc(len, GFP_KERNEL);
+ if (!bounce_buf)
+ return -ENOMEM;
+
+ if (copy_in) {
+ ret = copy_from_user(bounce_buf, (void __user *)buf, len);
+ if (ret)
+ return -EFAULT;
+ } else {
+ memset(bounce_buf, 0, len);
+ }
+
+ *bounce_buf_ret = bounce_buf;
+ hgcm_call_add_pagelist_size(bounce_buf, len, extra);
+ return 0;
+}
+
+/**
+ * Preprocesses the HGCM call, validate parameters, alloc bounce buffers and
+ * figure out how much extra storage we need for page lists.
+ * Return: 0 or negative errno value.
+ * @src_parm: Pointer to source function call parameters
+ * @parm_count: Number of function call parameters.
+ * @bounce_bufs_ret: Where to return the allocated bouncebuffer array
+ * @extra: Where to return the extra request space needed for
+ * physical page lists.
+ */
+static int hgcm_call_preprocess(
+ const struct vmmdev_hgcm_function_parameter *src_parm,
+ u32 parm_count, void ***bounce_bufs_ret, size_t *extra)
+{
+ void *buf, **bounce_bufs = NULL;
+ u32 i, len;
+ int ret;
+
+ for (i = 0; i < parm_count; i++, src_parm++) {
+ switch (src_parm->type) {
+ case VMMDEV_HGCM_PARM_TYPE_32BIT:
+ case VMMDEV_HGCM_PARM_TYPE_64BIT:
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
+ if (!bounce_bufs) {
+ bounce_bufs = kcalloc(parm_count,
+ sizeof(void *),
+ GFP_KERNEL);
+ if (!bounce_bufs)
+ return -ENOMEM;
+
+ *bounce_bufs_ret = bounce_bufs;
+ }
+
+ ret = hgcm_call_preprocess_linaddr(src_parm,
+ &bounce_bufs[i],
+ extra);
+ if (ret)
+ return ret;
+
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
+ buf = (void *)src_parm->u.pointer.u.linear_addr;
+ len = src_parm->u.pointer.size;
+ if (WARN_ON(len > VBG_MAX_HGCM_KERNEL_PARM))
+ return -E2BIG;
+
+ hgcm_call_add_pagelist_size(buf, len, extra);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * Translates linear address types to page list direction flags.
+ *
+ * Return: page list flags.
+ * @type: The type.
+ */
+static u32 hgcm_call_linear_addr_type_to_pagelist_flags(
+ enum vmmdev_hgcm_function_parameter_type type)
+{
+ switch (type) {
+ default:
+ WARN_ON(1);
+ /* Fall through */
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
+ return VMMDEV_HGCM_F_PARM_DIRECTION_BOTH;
+
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
+ return VMMDEV_HGCM_F_PARM_DIRECTION_TO_HOST;
+
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
+ return VMMDEV_HGCM_F_PARM_DIRECTION_FROM_HOST;
+ }
+}
+
+static void hgcm_call_init_linaddr(struct vmmdev_hgcm_call *call,
+ struct vmmdev_hgcm_function_parameter *dst_parm, void *buf, u32 len,
+ enum vmmdev_hgcm_function_parameter_type type, u32 *off_extra)
+{
+ struct vmmdev_hgcm_pagelist *dst_pg_lst;
+ struct page *page;
+ bool is_vmalloc;
+ u32 i, page_count;
+
+ dst_parm->type = type;
+
+ if (len == 0) {
+ dst_parm->u.pointer.size = 0;
+ dst_parm->u.pointer.u.linear_addr = 0;
+ return;
+ }
+
+ dst_pg_lst = (void *)call + *off_extra;
+ page_count = hgcm_call_buf_size_in_pages(buf, len);
+ is_vmalloc = is_vmalloc_addr(buf);
+
+ dst_parm->type = VMMDEV_HGCM_PARM_TYPE_PAGELIST;
+ dst_parm->u.page_list.size = len;
+ dst_parm->u.page_list.offset = *off_extra;
+ dst_pg_lst->flags = hgcm_call_linear_addr_type_to_pagelist_flags(type);
+ dst_pg_lst->offset_first_page = (unsigned long)buf & ~PAGE_MASK;
+ dst_pg_lst->page_count = page_count;
+
+ for (i = 0; i < page_count; i++) {
+ if (is_vmalloc)
+ page = vmalloc_to_page(buf);
+ else
+ page = virt_to_page(buf);
+
+ dst_pg_lst->pages[i] = page_to_phys(page);
+ buf += PAGE_SIZE;
+ }
+
+ *off_extra += offsetof(struct vmmdev_hgcm_pagelist, pages[page_count]);
+}
+
+/**
+ * Initializes the call request that we're sending to the host.
+ * @call: The call to initialize.
+ * @client_id: The client ID of the caller.
+ * @function: The function number of the function to call.
+ * @src_parm: Pointer to source function call parameters.
+ * @parm_count: Number of function call parameters.
+ * @bounce_bufs: The bouncebuffer array.
+ */
+static void hgcm_call_init_call(
+ struct vmmdev_hgcm_call *call, u32 client_id, u32 function,
+ const struct vmmdev_hgcm_function_parameter *src_parm,
+ u32 parm_count, void **bounce_bufs)
+{
+ struct vmmdev_hgcm_function_parameter *dst_parm =
+ VMMDEV_HGCM_CALL_PARMS(call);
+ u32 i, off_extra = (uintptr_t)(dst_parm + parm_count) - (uintptr_t)call;
+ void *buf;
+
+ call->header.flags = 0;
+ call->header.result = VINF_SUCCESS;
+ call->client_id = client_id;
+ call->function = function;
+ call->parm_count = parm_count;
+
+ for (i = 0; i < parm_count; i++, src_parm++, dst_parm++) {
+ switch (src_parm->type) {
+ case VMMDEV_HGCM_PARM_TYPE_32BIT:
+ case VMMDEV_HGCM_PARM_TYPE_64BIT:
+ *dst_parm = *src_parm;
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
+ hgcm_call_init_linaddr(call, dst_parm, bounce_bufs[i],
+ src_parm->u.pointer.size,
+ src_parm->type, &off_extra);
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
+ buf = (void *)src_parm->u.pointer.u.linear_addr;
+ hgcm_call_init_linaddr(call, dst_parm, buf,
+ src_parm->u.pointer.size,
+ src_parm->type, &off_extra);
+ break;
+
+ default:
+ WARN_ON(1);
+ dst_parm->type = VMMDEV_HGCM_PARM_TYPE_INVALID;
+ }
+ }
+}
+
+/**
+ * Tries to cancel a pending HGCM call.
+ *
+ * Return: VBox status code
+ */
+static int hgcm_cancel_call(struct vbg_dev *gdev, struct vmmdev_hgcm_call *call)
+{
+ int rc;
+
+ /*
+ * We use a pre-allocated request for cancellations, which is
+ * protected by cancel_req_mutex. This means that all cancellations
+ * get serialized, this should be fine since they should be rare.
+ */
+ mutex_lock(&gdev->cancel_req_mutex);
+ gdev->cancel_req->phys_req_to_cancel = virt_to_phys(call);
+ rc = vbg_req_perform(gdev, gdev->cancel_req);
+ mutex_unlock(&gdev->cancel_req_mutex);
+
+ if (rc == VERR_NOT_IMPLEMENTED) {
+ call->header.flags |= VMMDEV_HGCM_REQ_CANCELLED;
+ call->header.header.request_type = VMMDEVREQ_HGCM_CANCEL;
+
+ rc = vbg_req_perform(gdev, call);
+ if (rc == VERR_INVALID_PARAMETER)
+ rc = VERR_NOT_FOUND;
+ }
+
+ if (rc >= 0)
+ call->header.flags |= VMMDEV_HGCM_REQ_CANCELLED;
+
+ return rc;
+}
+
+/**
+ * Performs the call and completion wait.
+ * Return: 0 or negative errno value.
+ * @gdev: The VBoxGuest device extension.
+ * @call: The call to execute.
+ * @timeout_ms: Timeout in ms.
+ * @leak_it: Where to return the leak it / free it, indicator.
+ * Cancellation fun.
+ */
+static int vbg_hgcm_do_call(struct vbg_dev *gdev, struct vmmdev_hgcm_call *call,
+ u32 timeout_ms, bool *leak_it)
+{
+ int rc, cancel_rc, ret;
+ long timeout;
+
+ *leak_it = false;
+
+ rc = vbg_req_perform(gdev, call);
+
+ /*
+ * If the call failed, then pretend success. Upper layers will
+ * interpret the result code in the packet.
+ */
+ if (rc < 0) {
+ call->header.result = rc;
+ return 0;
+ }
+
+ if (rc != VINF_HGCM_ASYNC_EXECUTE)
+ return 0;
+
+ /* Host decided to process the request asynchronously, wait for it */
+ if (timeout_ms == U32_MAX)
+ timeout = MAX_SCHEDULE_TIMEOUT;
+ else
+ timeout = msecs_to_jiffies(timeout_ms);
+
+ timeout = wait_event_interruptible_timeout(
+ gdev->hgcm_wq,
+ hgcm_req_done(gdev, &call->header),
+ timeout);
+
+ /* timeout > 0 means hgcm_req_done has returned true, so success */
+ if (timeout > 0)
+ return 0;
+
+ if (timeout == 0)
+ ret = -ETIMEDOUT;
+ else
+ ret = -EINTR;
+
+ /* Cancel the request */
+ cancel_rc = hgcm_cancel_call(gdev, call);
+ if (cancel_rc >= 0)
+ return ret;
+
+ /*
+ * Failed to cancel, this should mean that the cancel has lost the
+ * race with normal completion, wait while the host completes it.
+ */
+ if (cancel_rc == VERR_NOT_FOUND || cancel_rc == VERR_SEM_DESTROYED)
+ timeout = msecs_to_jiffies(500);
+ else
+ timeout = msecs_to_jiffies(2000);
+
+ timeout = wait_event_timeout(gdev->hgcm_wq,
+ hgcm_req_done(gdev, &call->header),
+ timeout);
+
+ if (WARN_ON(timeout == 0)) {
+ /* We really should never get here */
+ vbg_err("%s: Call timedout and cancellation failed, leaking the request\n",
+ __func__);
+ *leak_it = true;
+ return ret;
+ }
+
+ /* The call has completed normally after all */
+ return 0;
+}
+
+/**
+ * Copies the result of the call back to the caller info structure and user
+ * buffers.
+ * Return: 0 or negative errno value.
+ * @call: HGCM call request.
+ * @dst_parm: Pointer to function call parameters destination.
+ * @parm_count: Number of function call parameters.
+ * @bounce_bufs: The bouncebuffer array.
+ */
+static int hgcm_call_copy_back_result(
+ const struct vmmdev_hgcm_call *call,
+ struct vmmdev_hgcm_function_parameter *dst_parm,
+ u32 parm_count, void **bounce_bufs)
+{
+ const struct vmmdev_hgcm_function_parameter *src_parm =
+ VMMDEV_HGCM_CALL_PARMS(call);
+ void __user *p;
+ int ret;
+ u32 i;
+
+ /* Copy back parameters. */
+ for (i = 0; i < parm_count; i++, src_parm++, dst_parm++) {
+ switch (dst_parm->type) {
+ case VMMDEV_HGCM_PARM_TYPE_32BIT:
+ case VMMDEV_HGCM_PARM_TYPE_64BIT:
+ *dst_parm = *src_parm;
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_PAGELIST:
+ dst_parm->u.page_list.size = src_parm->u.page_list.size;
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
+ dst_parm->u.pointer.size = src_parm->u.pointer.size;
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
+ dst_parm->u.pointer.size = src_parm->u.pointer.size;
+
+ p = (void __user *)dst_parm->u.pointer.u.linear_addr;
+ ret = copy_to_user(p, bounce_bufs[i],
+ min(src_parm->u.pointer.size,
+ dst_parm->u.pointer.size));
+ if (ret)
+ return -EFAULT;
+ break;
+
+ default:
+ WARN_ON(1);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+int vbg_hgcm_call(struct vbg_dev *gdev, u32 client_id, u32 function,
+ u32 timeout_ms, struct vmmdev_hgcm_function_parameter *parms,
+ u32 parm_count, int *vbox_status)
+{
+ struct vmmdev_hgcm_call *call;
+ void **bounce_bufs = NULL;
+ bool leak_it;
+ size_t size;
+ int i, ret;
+
+ size = sizeof(struct vmmdev_hgcm_call) +
+ parm_count * sizeof(struct vmmdev_hgcm_function_parameter);
+ /*
+ * Validate and buffer the parameters for the call. This also increases
+ * call_size with the amount of extra space needed for page lists.
+ */
+ ret = hgcm_call_preprocess(parms, parm_count, &bounce_bufs, &size);
+ if (ret) {
+ /* Even on error bounce bufs may still have been allocated */
+ goto free_bounce_bufs;
+ }
+
+ call = vbg_req_alloc(size, VMMDEVREQ_HGCM_CALL);
+ if (!call) {
+ ret = -ENOMEM;
+ goto free_bounce_bufs;
+ }
+
+ hgcm_call_init_call(call, client_id, function, parms, parm_count,
+ bounce_bufs);
+
+ ret = vbg_hgcm_do_call(gdev, call, timeout_ms, &leak_it);
+ if (ret == 0) {
+ *vbox_status = call->header.result;
+ ret = hgcm_call_copy_back_result(call, parms, parm_count,
+ bounce_bufs);
+ }
+
+ if (!leak_it)
+ vbg_req_free(call, size);
+
+free_bounce_bufs:
+ if (bounce_bufs) {
+ for (i = 0; i < parm_count; i++)
+ kvfree(bounce_bufs[i]);
+ kfree(bounce_bufs);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(vbg_hgcm_call);
+
+#ifdef CONFIG_COMPAT
+int vbg_hgcm_call32(
+ struct vbg_dev *gdev, u32 client_id, u32 function, u32 timeout_ms,
+ struct vmmdev_hgcm_function_parameter32 *parm32, u32 parm_count,
+ int *vbox_status)
+{
+ struct vmmdev_hgcm_function_parameter *parm64 = NULL;
+ u32 i, size;
+ int ret = 0;
+
+ /* KISS allocate a temporary request and convert the parameters. */
+ size = parm_count * sizeof(struct vmmdev_hgcm_function_parameter);
+ parm64 = kzalloc(size, GFP_KERNEL);
+ if (!parm64)
+ return -ENOMEM;
+
+ for (i = 0; i < parm_count; i++) {
+ switch (parm32[i].type) {
+ case VMMDEV_HGCM_PARM_TYPE_32BIT:
+ parm64[i].type = VMMDEV_HGCM_PARM_TYPE_32BIT;
+ parm64[i].u.value32 = parm32[i].u.value32;
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_64BIT:
+ parm64[i].type = VMMDEV_HGCM_PARM_TYPE_64BIT;
+ parm64[i].u.value64 = parm32[i].u.value64;
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
+ parm64[i].type = parm32[i].type;
+ parm64[i].u.pointer.size = parm32[i].u.pointer.size;
+ parm64[i].u.pointer.u.linear_addr =
+ parm32[i].u.pointer.u.linear_addr;
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+ if (ret < 0)
+ goto out_free;
+ }
+
+ ret = vbg_hgcm_call(gdev, client_id, function, timeout_ms,
+ parm64, parm_count, vbox_status);
+ if (ret < 0)
+ goto out_free;
+
+ /* Copy back. */
+ for (i = 0; i < parm_count; i++, parm32++, parm64++) {
+ switch (parm64[i].type) {
+ case VMMDEV_HGCM_PARM_TYPE_32BIT:
+ parm32[i].u.value32 = parm64[i].u.value32;
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_64BIT:
+ parm32[i].u.value64 = parm64[i].u.value64;
+ break;
+
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR:
+ case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
+ parm32[i].u.pointer.size = parm64[i].u.pointer.size;
+ break;
+
+ default:
+ WARN_ON(1);
+ ret = -EINVAL;
+ }
+ }
+
+out_free:
+ kfree(parm64);
+ return ret;
+}
+#endif
+
+static const int vbg_status_code_to_errno_table[] = {
+ [-VERR_ACCESS_DENIED] = -EPERM,
+ [-VERR_FILE_NOT_FOUND] = -ENOENT,
+ [-VERR_PROCESS_NOT_FOUND] = -ESRCH,
+ [-VERR_INTERRUPTED] = -EINTR,
+ [-VERR_DEV_IO_ERROR] = -EIO,
+ [-VERR_TOO_MUCH_DATA] = -E2BIG,
+ [-VERR_BAD_EXE_FORMAT] = -ENOEXEC,
+ [-VERR_INVALID_HANDLE] = -EBADF,
+ [-VERR_TRY_AGAIN] = -EAGAIN,
+ [-VERR_NO_MEMORY] = -ENOMEM,
+ [-VERR_INVALID_POINTER] = -EFAULT,
+ [-VERR_RESOURCE_BUSY] = -EBUSY,
+ [-VERR_ALREADY_EXISTS] = -EEXIST,
+ [-VERR_NOT_SAME_DEVICE] = -EXDEV,
+ [-VERR_NOT_A_DIRECTORY] = -ENOTDIR,
+ [-VERR_PATH_NOT_FOUND] = -ENOTDIR,
+ [-VERR_INVALID_NAME] = -ENOENT,
+ [-VERR_IS_A_DIRECTORY] = -EISDIR,
+ [-VERR_INVALID_PARAMETER] = -EINVAL,
+ [-VERR_TOO_MANY_OPEN_FILES] = -ENFILE,
+ [-VERR_INVALID_FUNCTION] = -ENOTTY,
+ [-VERR_SHARING_VIOLATION] = -ETXTBSY,
+ [-VERR_FILE_TOO_BIG] = -EFBIG,
+ [-VERR_DISK_FULL] = -ENOSPC,
+ [-VERR_SEEK_ON_DEVICE] = -ESPIPE,
+ [-VERR_WRITE_PROTECT] = -EROFS,
+ [-VERR_BROKEN_PIPE] = -EPIPE,
+ [-VERR_DEADLOCK] = -EDEADLK,
+ [-VERR_FILENAME_TOO_LONG] = -ENAMETOOLONG,
+ [-VERR_FILE_LOCK_FAILED] = -ENOLCK,
+ [-VERR_NOT_IMPLEMENTED] = -ENOSYS,
+ [-VERR_NOT_SUPPORTED] = -ENOSYS,
+ [-VERR_DIR_NOT_EMPTY] = -ENOTEMPTY,
+ [-VERR_TOO_MANY_SYMLINKS] = -ELOOP,
+ [-VERR_NO_MORE_FILES] = -ENODATA,
+ [-VERR_NO_DATA] = -ENODATA,
+ [-VERR_NET_NO_NETWORK] = -ENONET,
+ [-VERR_NET_NOT_UNIQUE_NAME] = -ENOTUNIQ,
+ [-VERR_NO_TRANSLATION] = -EILSEQ,
+ [-VERR_NET_NOT_SOCKET] = -ENOTSOCK,
+ [-VERR_NET_DEST_ADDRESS_REQUIRED] = -EDESTADDRREQ,
+ [-VERR_NET_MSG_SIZE] = -EMSGSIZE,
+ [-VERR_NET_PROTOCOL_TYPE] = -EPROTOTYPE,
+ [-VERR_NET_PROTOCOL_NOT_AVAILABLE] = -ENOPROTOOPT,
+ [-VERR_NET_PROTOCOL_NOT_SUPPORTED] = -EPROTONOSUPPORT,
+ [-VERR_NET_SOCKET_TYPE_NOT_SUPPORTED] = -ESOCKTNOSUPPORT,
+ [-VERR_NET_OPERATION_NOT_SUPPORTED] = -EOPNOTSUPP,
+ [-VERR_NET_PROTOCOL_FAMILY_NOT_SUPPORTED] = -EPFNOSUPPORT,
+ [-VERR_NET_ADDRESS_FAMILY_NOT_SUPPORTED] = -EAFNOSUPPORT,
+ [-VERR_NET_ADDRESS_IN_USE] = -EADDRINUSE,
+ [-VERR_NET_ADDRESS_NOT_AVAILABLE] = -EADDRNOTAVAIL,
+ [-VERR_NET_DOWN] = -ENETDOWN,
+ [-VERR_NET_UNREACHABLE] = -ENETUNREACH,
+ [-VERR_NET_CONNECTION_RESET] = -ENETRESET,
+ [-VERR_NET_CONNECTION_ABORTED] = -ECONNABORTED,
+ [-VERR_NET_CONNECTION_RESET_BY_PEER] = -ECONNRESET,
+ [-VERR_NET_NO_BUFFER_SPACE] = -ENOBUFS,
+ [-VERR_NET_ALREADY_CONNECTED] = -EISCONN,
+ [-VERR_NET_NOT_CONNECTED] = -ENOTCONN,
+ [-VERR_NET_SHUTDOWN] = -ESHUTDOWN,
+ [-VERR_NET_TOO_MANY_REFERENCES] = -ETOOMANYREFS,
+ [-VERR_TIMEOUT] = -ETIMEDOUT,
+ [-VERR_NET_CONNECTION_REFUSED] = -ECONNREFUSED,
+ [-VERR_NET_HOST_DOWN] = -EHOSTDOWN,
+ [-VERR_NET_HOST_UNREACHABLE] = -EHOSTUNREACH,
+ [-VERR_NET_ALREADY_IN_PROGRESS] = -EALREADY,
+ [-VERR_NET_IN_PROGRESS] = -EINPROGRESS,
+ [-VERR_MEDIA_NOT_PRESENT] = -ENOMEDIUM,
+ [-VERR_MEDIA_NOT_RECOGNIZED] = -EMEDIUMTYPE,
+};
+
+int vbg_status_code_to_errno(int rc)
+{
+ if (rc >= 0)
+ return 0;
+
+ rc = -rc;
+ if (rc >= ARRAY_SIZE(vbg_status_code_to_errno_table) ||
+ vbg_status_code_to_errno_table[rc] == 0) {
+ vbg_warn("%s: Unhandled err %d\n", __func__, -rc);
+ return -EPROTO;
+ }
+
+ return vbg_status_code_to_errno_table[rc];
+}
+EXPORT_SYMBOL(vbg_status_code_to_errno);
diff --git a/drivers/virt/vboxguest/vboxguest_version.h b/drivers/virt/vboxguest/vboxguest_version.h
new file mode 100644
index 0000000..77f0c8f
--- /dev/null
+++ b/drivers/virt/vboxguest/vboxguest_version.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */
+/*
+ * VBox Guest additions version info, this is used by the host to determine
+ * supported guest-addition features in some cases. So this will need to be
+ * synced with vbox upstreams versioning scheme when we implement / port
+ * new features from the upstream out-of-tree vboxguest driver.
+ */
+
+#ifndef __VBOX_VERSION_H__
+#define __VBOX_VERSION_H__
+
+/* Last synced October 4th 2017 */
+#define VBG_VERSION_MAJOR 5
+#define VBG_VERSION_MINOR 2
+#define VBG_VERSION_BUILD 0
+#define VBG_SVN_REV 68940
+#define VBG_VERSION_STRING "5.2.0"
+
+#endif
diff --git a/drivers/virt/vboxguest/vmmdev.h b/drivers/virt/vboxguest/vmmdev.h
new file mode 100644
index 0000000..5e2ae97
--- /dev/null
+++ b/drivers/virt/vboxguest/vmmdev.h
@@ -0,0 +1,449 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */
+/*
+ * Virtual Device for Guest <-> VMM/Host communication interface
+ *
+ * Copyright (C) 2006-2016 Oracle Corporation
+ */
+
+#ifndef __VBOX_VMMDEV_H__
+#define __VBOX_VMMDEV_H__
+
+#include <asm/bitsperlong.h>
+#include <linux/sizes.h>
+#include <linux/types.h>
+#include <linux/vbox_vmmdev_types.h>
+
+/* Port for generic request interface (relative offset). */
+#define VMMDEV_PORT_OFF_REQUEST 0
+
+/** Layout of VMMDEV RAM region that contains information for guest. */
+struct vmmdev_memory {
+ /** The size of this structure. */
+ u32 size;
+ /** The structure version. (VMMDEV_MEMORY_VERSION) */
+ u32 version;
+
+ union {
+ struct {
+ /** Flag telling that VMMDev has events pending. */
+ u8 have_events;
+ /** Explicit padding, MBZ. */
+ u8 padding[3];
+ } V1_04;
+
+ struct {
+ /** Pending events flags, set by host. */
+ u32 host_events;
+ /** Mask of events the guest wants, set by guest. */
+ u32 guest_event_mask;
+ } V1_03;
+ } V;
+
+ /* struct vbva_memory, not used */
+};
+VMMDEV_ASSERT_SIZE(vmmdev_memory, 8 + 8);
+
+/** Version of vmmdev_memory structure (vmmdev_memory::version). */
+#define VMMDEV_MEMORY_VERSION (1)
+
+/* Host mouse capabilities has been changed. */
+#define VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED BIT(0)
+/* HGCM event. */
+#define VMMDEV_EVENT_HGCM BIT(1)
+/* A display change request has been issued. */
+#define VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST BIT(2)
+/* Credentials are available for judgement. */
+#define VMMDEV_EVENT_JUDGE_CREDENTIALS BIT(3)
+/* The guest has been restored. */
+#define VMMDEV_EVENT_RESTORED BIT(4)
+/* Seamless mode state changed. */
+#define VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST BIT(5)
+/* Memory balloon size changed. */
+#define VMMDEV_EVENT_BALLOON_CHANGE_REQUEST BIT(6)
+/* Statistics interval changed. */
+#define VMMDEV_EVENT_STATISTICS_INTERVAL_CHANGE_REQUEST BIT(7)
+/* VRDP status changed. */
+#define VMMDEV_EVENT_VRDP BIT(8)
+/* New mouse position data available. */
+#define VMMDEV_EVENT_MOUSE_POSITION_CHANGED BIT(9)
+/* CPU hotplug event occurred. */
+#define VMMDEV_EVENT_CPU_HOTPLUG BIT(10)
+/* The mask of valid events, for sanity checking. */
+#define VMMDEV_EVENT_VALID_EVENT_MASK 0x000007ffU
+
+/*
+ * Additions are allowed to work only if additions_major == vmmdev_current &&
+ * additions_minor <= vmmdev_current. Additions version is reported to host
+ * (VMMDev) by VMMDEVREQ_REPORT_GUEST_INFO.
+ */
+#define VMMDEV_VERSION 0x00010004
+#define VMMDEV_VERSION_MAJOR (VMMDEV_VERSION >> 16)
+#define VMMDEV_VERSION_MINOR (VMMDEV_VERSION & 0xffff)
+
+/* Maximum request packet size. */
+#define VMMDEV_MAX_VMMDEVREQ_SIZE 1048576
+
+/* Version of vmmdev_request_header structure. */
+#define VMMDEV_REQUEST_HEADER_VERSION 0x10001
+
+/** struct vmmdev_request_header - Generic VMMDev request header. */
+struct vmmdev_request_header {
+ /** IN: Size of the structure in bytes (including body). */
+ u32 size;
+ /** IN: Version of the structure. */
+ u32 version;
+ /** IN: Type of the request. */
+ enum vmmdev_request_type request_type;
+ /** OUT: Return code. */
+ s32 rc;
+ /** Reserved field no.1. MBZ. */
+ u32 reserved1;
+ /** Reserved field no.2. MBZ. */
+ u32 reserved2;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_request_header, 24);
+
+/**
+ * struct vmmdev_mouse_status - Mouse status request structure.
+ *
+ * Used by VMMDEVREQ_GET_MOUSE_STATUS and VMMDEVREQ_SET_MOUSE_STATUS.
+ */
+struct vmmdev_mouse_status {
+ /** header */
+ struct vmmdev_request_header header;
+ /** Mouse feature mask. See VMMDEV_MOUSE_*. */
+ u32 mouse_features;
+ /** Mouse x position. */
+ s32 pointer_pos_x;
+ /** Mouse y position. */
+ s32 pointer_pos_y;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_mouse_status, 24 + 12);
+
+/* The guest can (== wants to) handle absolute coordinates. */
+#define VMMDEV_MOUSE_GUEST_CAN_ABSOLUTE BIT(0)
+/*
+ * The host can (== wants to) send absolute coordinates.
+ * (Input not captured.)
+ */
+#define VMMDEV_MOUSE_HOST_WANTS_ABSOLUTE BIT(1)
+/*
+ * The guest can *NOT* switch to software cursor and therefore depends on the
+ * host cursor.
+ *
+ * When guest additions are installed and the host has promised to display the
+ * cursor itself, the guest installs a hardware mouse driver. Don't ask the
+ * guest to switch to a software cursor then.
+ */
+#define VMMDEV_MOUSE_GUEST_NEEDS_HOST_CURSOR BIT(2)
+/* The host does NOT provide support for drawing the cursor itself. */
+#define VMMDEV_MOUSE_HOST_CANNOT_HWPOINTER BIT(3)
+/* The guest can read VMMDev events to find out about pointer movement */
+#define VMMDEV_MOUSE_NEW_PROTOCOL BIT(4)
+/*
+ * If the guest changes the status of the VMMDEV_MOUSE_GUEST_NEEDS_HOST_CURSOR
+ * bit, the host will honour this.
+ */
+#define VMMDEV_MOUSE_HOST_RECHECKS_NEEDS_HOST_CURSOR BIT(5)
+/*
+ * The host supplies an absolute pointing device. The Guest Additions may
+ * wish to use this to decide whether to install their own driver.
+ */
+#define VMMDEV_MOUSE_HOST_HAS_ABS_DEV BIT(6)
+
+/* The minimum value our pointing device can return. */
+#define VMMDEV_MOUSE_RANGE_MIN 0
+/* The maximum value our pointing device can return. */
+#define VMMDEV_MOUSE_RANGE_MAX 0xFFFF
+
+/**
+ * struct vmmdev_host_version - VirtualBox host version request structure.
+ *
+ * VBG uses this to detect the precense of new features in the interface.
+ */
+struct vmmdev_host_version {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /** Major version. */
+ u16 major;
+ /** Minor version. */
+ u16 minor;
+ /** Build number. */
+ u32 build;
+ /** SVN revision. */
+ u32 revision;
+ /** Feature mask. */
+ u32 features;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_host_version, 24 + 16);
+
+/* Physical page lists are supported by HGCM. */
+#define VMMDEV_HVF_HGCM_PHYS_PAGE_LIST BIT(0)
+
+/**
+ * struct vmmdev_mask - Structure to set / clear bits in a mask used for
+ * VMMDEVREQ_SET_GUEST_CAPABILITIES and VMMDEVREQ_CTL_GUEST_FILTER_MASK.
+ */
+struct vmmdev_mask {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /** Mask of bits to be set. */
+ u32 or_mask;
+ /** Mask of bits to be cleared. */
+ u32 not_mask;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_mask, 24 + 8);
+
+/* The guest supports seamless display rendering. */
+#define VMMDEV_GUEST_SUPPORTS_SEAMLESS BIT(0)
+/* The guest supports mapping guest to host windows. */
+#define VMMDEV_GUEST_SUPPORTS_GUEST_HOST_WINDOW_MAPPING BIT(1)
+/*
+ * The guest graphical additions are active.
+ * Used for fast activation and deactivation of certain graphical operations
+ * (e.g. resizing & seamless). The legacy VMMDEVREQ_REPORT_GUEST_CAPABILITIES
+ * request sets this automatically, but VMMDEVREQ_SET_GUEST_CAPABILITIES does
+ * not.
+ */
+#define VMMDEV_GUEST_SUPPORTS_GRAPHICS BIT(2)
+
+/** struct vmmdev_hypervisorinfo - Hypervisor info structure. */
+struct vmmdev_hypervisorinfo {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /**
+ * Guest virtual address of proposed hypervisor start.
+ * Not used by VMMDEVREQ_GET_HYPERVISOR_INFO.
+ */
+ u32 hypervisor_start;
+ /** Hypervisor size in bytes. */
+ u32 hypervisor_size;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_hypervisorinfo, 24 + 8);
+
+/** struct vmmdev_events - Pending events structure. */
+struct vmmdev_events {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /** OUT: Pending event mask. */
+ u32 events;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_events, 24 + 4);
+
+#define VMMDEV_OSTYPE_LINUX26 0x53000
+#define VMMDEV_OSTYPE_X64 BIT(8)
+
+/** struct vmmdev_guestinfo - Guest information report. */
+struct vmmdev_guest_info {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /**
+ * The VMMDev interface version expected by additions.
+ * *Deprecated*, do not use anymore! Will be removed.
+ */
+ u32 interface_version;
+ /** Guest OS type. */
+ u32 os_type;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_guest_info, 24 + 8);
+
+/** struct vmmdev_guestinfo2 - Guest information report, version 2. */
+struct vmmdev_guest_info2 {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /** Major version. */
+ u16 additions_major;
+ /** Minor version. */
+ u16 additions_minor;
+ /** Build number. */
+ u32 additions_build;
+ /** SVN revision. */
+ u32 additions_revision;
+ /** Feature mask, currently unused. */
+ u32 additions_features;
+ /**
+ * The intentional meaning of this field was:
+ * Some additional information, for example 'Beta 1' or something like
+ * that.
+ *
+ * The way it was implemented was implemented: VBG_VERSION_STRING.
+ *
+ * This means the first three members are duplicated in this field (if
+ * the guest build config is sane). So, the user must check this and
+ * chop it off before usage. There is, because of the Main code's blind
+ * trust in the field's content, no way back.
+ */
+ char name[128];
+};
+VMMDEV_ASSERT_SIZE(vmmdev_guest_info2, 24 + 144);
+
+enum vmmdev_guest_facility_type {
+ VBOXGUEST_FACILITY_TYPE_UNKNOWN = 0,
+ VBOXGUEST_FACILITY_TYPE_VBOXGUEST_DRIVER = 20,
+ /* VBoxGINA / VBoxCredProv / pam_vbox. */
+ VBOXGUEST_FACILITY_TYPE_AUTO_LOGON = 90,
+ VBOXGUEST_FACILITY_TYPE_VBOX_SERVICE = 100,
+ /* VBoxTray (Windows), VBoxClient (Linux, Unix). */
+ VBOXGUEST_FACILITY_TYPE_VBOX_TRAY_CLIENT = 101,
+ VBOXGUEST_FACILITY_TYPE_SEAMLESS = 1000,
+ VBOXGUEST_FACILITY_TYPE_GRAPHICS = 1100,
+ VBOXGUEST_FACILITY_TYPE_ALL = 0x7ffffffe,
+ /* Ensure the enum is a 32 bit data-type */
+ VBOXGUEST_FACILITY_TYPE_SIZEHACK = 0x7fffffff
+};
+
+enum vmmdev_guest_facility_status {
+ VBOXGUEST_FACILITY_STATUS_INACTIVE = 0,
+ VBOXGUEST_FACILITY_STATUS_PAUSED = 1,
+ VBOXGUEST_FACILITY_STATUS_PRE_INIT = 20,
+ VBOXGUEST_FACILITY_STATUS_INIT = 30,
+ VBOXGUEST_FACILITY_STATUS_ACTIVE = 50,
+ VBOXGUEST_FACILITY_STATUS_TERMINATING = 100,
+ VBOXGUEST_FACILITY_STATUS_TERMINATED = 101,
+ VBOXGUEST_FACILITY_STATUS_FAILED = 800,
+ VBOXGUEST_FACILITY_STATUS_UNKNOWN = 999,
+ /* Ensure the enum is a 32 bit data-type */
+ VBOXGUEST_FACILITY_STATUS_SIZEHACK = 0x7fffffff
+};
+
+/** struct vmmdev_guest_status - Guest Additions status structure. */
+struct vmmdev_guest_status {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /** Facility the status is indicated for. */
+ enum vmmdev_guest_facility_type facility;
+ /** Current guest status. */
+ enum vmmdev_guest_facility_status status;
+ /** Flags, not used at the moment. */
+ u32 flags;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_guest_status, 24 + 12);
+
+#define VMMDEV_MEMORY_BALLOON_CHUNK_SIZE (1048576)
+#define VMMDEV_MEMORY_BALLOON_CHUNK_PAGES (1048576 / 4096)
+
+/** struct vmmdev_memballoon_info - Memory-balloon info structure. */
+struct vmmdev_memballoon_info {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /** Balloon size in megabytes. */
+ u32 balloon_chunks;
+ /** Guest ram size in megabytes. */
+ u32 phys_mem_chunks;
+ /**
+ * Setting this to VMMDEV_EVENT_BALLOON_CHANGE_REQUEST indicates that
+ * the request is a response to that event.
+ * (Don't confuse this with VMMDEVREQ_ACKNOWLEDGE_EVENTS.)
+ */
+ u32 event_ack;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_memballoon_info, 24 + 12);
+
+/** struct vmmdev_memballoon_change - Change the size of the balloon. */
+struct vmmdev_memballoon_change {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /** The number of pages in the array. */
+ u32 pages;
+ /** true = inflate, false = deflate. */
+ u32 inflate;
+ /** Physical address (u64) of each page. */
+ u64 phys_page[VMMDEV_MEMORY_BALLOON_CHUNK_PAGES];
+};
+
+/** struct vmmdev_write_core_dump - Write Core Dump request data. */
+struct vmmdev_write_core_dump {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /** Flags (reserved, MBZ). */
+ u32 flags;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_write_core_dump, 24 + 4);
+
+/** struct vmmdev_heartbeat - Heart beat check state structure. */
+struct vmmdev_heartbeat {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /** OUT: Guest heartbeat interval in nanosec. */
+ u64 interval_ns;
+ /** Heartbeat check flag. */
+ u8 enabled;
+ /** Explicit padding, MBZ. */
+ u8 padding[3];
+} __packed;
+VMMDEV_ASSERT_SIZE(vmmdev_heartbeat, 24 + 12);
+
+#define VMMDEV_HGCM_REQ_DONE BIT(0)
+#define VMMDEV_HGCM_REQ_CANCELLED BIT(1)
+
+/** struct vmmdev_hgcmreq_header - vmmdev HGCM requests header. */
+struct vmmdev_hgcmreq_header {
+ /** Request header. */
+ struct vmmdev_request_header header;
+
+ /** HGCM flags. */
+ u32 flags;
+
+ /** Result code. */
+ s32 result;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_hgcmreq_header, 24 + 8);
+
+/** struct vmmdev_hgcm_connect - HGCM connect request structure. */
+struct vmmdev_hgcm_connect {
+ /** HGCM request header. */
+ struct vmmdev_hgcmreq_header header;
+
+ /** IN: Description of service to connect to. */
+ struct vmmdev_hgcm_service_location loc;
+
+ /** OUT: Client identifier assigned by local instance of HGCM. */
+ u32 client_id;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_hgcm_connect, 32 + 132 + 4);
+
+/** struct vmmdev_hgcm_disconnect - HGCM disconnect request structure. */
+struct vmmdev_hgcm_disconnect {
+ /** HGCM request header. */
+ struct vmmdev_hgcmreq_header header;
+
+ /** IN: Client identifier. */
+ u32 client_id;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_hgcm_disconnect, 32 + 4);
+
+#define VMMDEV_HGCM_MAX_PARMS 32
+
+/** struct vmmdev_hgcm_call - HGCM call request structure. */
+struct vmmdev_hgcm_call {
+ /* request header */
+ struct vmmdev_hgcmreq_header header;
+
+ /** IN: Client identifier. */
+ u32 client_id;
+ /** IN: Service function number. */
+ u32 function;
+ /** IN: Number of parameters. */
+ u32 parm_count;
+ /** Parameters follow in form: HGCMFunctionParameter32|64 parms[X]; */
+};
+VMMDEV_ASSERT_SIZE(vmmdev_hgcm_call, 32 + 12);
+
+/**
+ * struct vmmdev_hgcm_cancel2 - HGCM cancel request structure, version 2.
+ *
+ * After the request header.rc will be:
+ *
+ * VINF_SUCCESS when cancelled.
+ * VERR_NOT_FOUND if the specified request cannot be found.
+ * VERR_INVALID_PARAMETER if the address is invalid valid.
+ */
+struct vmmdev_hgcm_cancel2 {
+ /** Header. */
+ struct vmmdev_request_header header;
+ /** The physical address of the request to cancel. */
+ u32 phys_req_to_cancel;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_hgcm_cancel2, 24 + 4);
+
+#endif