5.4.70.40

PKGBUILD:
Upgrade to 5.4.70.40.
Add all patches in use for core/linux-lts.

1 files changed, 689 insertions, 0 deletions

diff --git a/0002-virt-vbox-Add-support-for-the-new-VBG_IOCTL_ACQUIRE_.patch b/0002-virt-vbox-Add-support-for-the-new-VBG_IOCTL_ACQUIRE_.patch
new file mode 100644
index 0000000..ce36e01
--- /dev/null
+++ b/0002-virt-vbox-Add-support-for-the-new-VBG_IOCTL_ACQUIRE_.patch
@@ -0,0 +1,689 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: "Jan Alexander Steffens (heftig)" <heftig@archlinux.org>
+Date: Wed, 15 Jul 2020 22:42:07 +0200
+Subject: [PATCH] virt: vbox: Add support for the new
+ VBG_IOCTL_ACQUIRE_GUEST_CAPABILITIES ioctl
+
+https://lore.kernel.org/patchwork/cover/1270301/
+
+Needed for https://bugs.archlinux.org/task/67253
+
+Squashed commit of the following:
+
+commit 0d7bec556896815f4920a5ed87339732c697175c
+Author: Hans de Goede <hdegoede@redhat.com>
+Date:   Thu Jul 9 14:08:58 2020 +0200
+
+    virt: vbox: Fix some comments which talk about the "session spinlock"
+
+    The session lock is a mutex, not a spinlock, fix the comments to match.
+
+    Acked-by: Arnd Bergmann <arnd@arndb.de>
+    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+
+commit fed91350029e0c3bf626bd55a148e766587ec439
+Author: Hans de Goede <hdegoede@redhat.com>
+Date:   Thu Jul 9 14:08:57 2020 +0200
+
+    virt: vbox: Log unknown ioctl requests as error
+
+    Every now and then upstream adds new ioctls without notifying us,
+    log unknown ioctl requests as an error to catch these.
+
+    Acked-by: Arnd Bergmann <arnd@arndb.de>
+    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+
+commit 245d06f4c1b8f84cde07d14c09296a4fe90a26f0
+Author: Hans de Goede <hdegoede@redhat.com>
+Date:   Thu Jul 9 14:08:56 2020 +0200
+
+    virt: vbox: Add a few new vmmdev request types to the userspace whitelist
+
+    Upstream VirtualBox has defined and is using a few new request types for
+    vmmdev requests passed through /dev/vboxguest to the hypervisor.
+
+    Add the defines for these to vbox_vmmdev_types.h and add add them to the
+    whitelists of vmmdev requests which userspace is allowed to make.
+
+    BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1789545
+    Acked-by: Arnd Bergmann <arnd@arndb.de>
+    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+
+commit 2f24f5446915322bbbb1ccf4ee2297512feab942
+Author: Hans de Goede <hdegoede@redhat.com>
+Date:   Thu Jul 9 14:08:55 2020 +0200
+
+    virt: vbox: Add support for the new VBG_IOCTL_ACQUIRE_GUEST_CAPABILITIES ioctl
+
+    Add support for the new VBG_IOCTL_ACQUIRE_GUEST_CAPABILITIES ioctl, this
+    is necessary for automatic resizing of the guest resolution to match the
+    VM-window size to work with the new VMSVGA virtual GPU which is now the
+    new default in VirtualBox.
+
+    BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1789545
+    Acked-by: Arnd Bergmann <arnd@arndb.de>
+    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+
+commit 2fc9822453e8dd215765cd2b28e5e6e26338829e
+Author: Hans de Goede <hdegoede@redhat.com>
+Date:   Thu Jul 9 14:08:54 2020 +0200
+
+    virt: vbox: Add vbg_set_host_capabilities() helper function
+
+    Add vbg_set_host_capabilities() helper function,  this is a preparation
+    patch for adding support for the VBGL_IOCTL_GUEST_CAPS_ACQUIRE ioctl.
+
+    Acked-by: Arnd Bergmann <arnd@arndb.de>
+    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+
+commit 1594daf929c8691849c00e49e4a1ed977048addc
+Author: Hans de Goede <hdegoede@redhat.com>
+Date:   Thu Jul 9 14:08:53 2020 +0200
+
+    virt: vbox: Rename guest_caps struct members to set_guest_caps
+
+    Rename guest_caps[_tracker] struct members to set_guest_caps[_tracker]
+    this is a preparation patch for adding support for the
+    VBGL_IOCTL_GUEST_CAPS_ACQUIRE ioctl.
+
+    Acked-by: Arnd Bergmann <arnd@arndb.de>
+    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+
+commit d7f3b7cec66d171cf5194ad37f647f4562da6ccc
+Author: Hans de Goede <hdegoede@redhat.com>
+Date:   Thu Jul 9 14:08:52 2020 +0200
+
+    virt: vbox: Fix guest capabilities mask check
+
+    Check the passed in capabilities against VMMDEV_GUEST_CAPABILITIES_MASK
+    instead of against VMMDEV_EVENT_VALID_EVENT_MASK.
+    This tightens the allowed mask from 0x7ff to 0x7.
+
+    Fixes: 0ba002bc4393 ("virt: Add vboxguest driver for Virtual Box Guest integration")
+    Cc: stable@vger.kernel.org
+    Acked-by: Arnd Bergmann <arnd@arndb.de>
+    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+
+commit f6694fa90e2183874def2d022d097795e2269a15
+Author: Hans de Goede <hdegoede@redhat.com>
+Date:   Thu Jul 9 14:08:51 2020 +0200
+
+    virt: vbox: Fix VBGL_IOCTL_VMMDEV_REQUEST_BIG and _LOG req numbers to match upstream
+
+    Until this commit the mainline kernel version (this version) of the
+    vboxguest module contained a bug where it defined
+    VBGL_IOCTL_VMMDEV_REQUEST_BIG and VBGL_IOCTL_LOG using
+    _IOC(_IOC_READ | _IOC_WRITE, 'V', ...) instead of
+    _IO(V, ...) as the out of tree VirtualBox upstream version does.
+
+    Since the VirtualBox userspace bits are always built against VirtualBox
+    upstream's headers, this means that so far the mainline kernel version
+    of the vboxguest module has been failing these 2 ioctls with -ENOTTY.
+    I guess that VBGL_IOCTL_VMMDEV_REQUEST_BIG is never used causing us to
+    not hit that one and sofar the vboxguest driver has failed to actually
+    log any log messages passed it through VBGL_IOCTL_LOG.
+
+    This commit changes the VBGL_IOCTL_VMMDEV_REQUEST_BIG and VBGL_IOCTL_LOG
+    defines to match the out of tree VirtualBox upstream vboxguest version,
+    while keeping compatibility with the old wrong request defines so as
+    to not break the kernel ABI in case someone has been using the old
+    request defines.
+
+    Fixes: f6ddd094f579 ("virt: Add vboxguest driver for Virtual Box Guest integration UAPI")
+    Cc: stable@vger.kernel.org
+    Acked-by: Arnd Bergmann <arnd@arndb.de>
+    Reviewed-by: Arnd Bergmann <arnd@arndb.de>
+    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ drivers/virt/vboxguest/vboxguest_core.c  | 266 +++++++++++++++++++----
+ drivers/virt/vboxguest/vboxguest_core.h  |  23 +-
+ drivers/virt/vboxguest/vboxguest_utils.c |   1 +
+ include/linux/vbox_utils.h               |   1 +
+ include/uapi/linux/vbox_vmmdev_types.h   |   3 +
+ include/uapi/linux/vboxguest.h           |  24 ++
+ 6 files changed, 269 insertions(+), 49 deletions(-)
+
+diff --git a/drivers/virt/vboxguest/vboxguest_core.c b/drivers/virt/vboxguest/vboxguest_core.c
+index 95bfdb8ac8a2..f449fc366cf3 100644
+--- a/drivers/virt/vboxguest/vboxguest_core.c
++++ b/drivers/virt/vboxguest/vboxguest_core.c
+@@ -558,7 +558,7 @@ static int vbg_reset_host_event_filter(struct vbg_dev *gdev,
+  * 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.
++ * do session cleanup. Takes the session mutex.
+  *
+  * Return: 0 or negative errno value.
+  * @gdev:			The Guest extension device.
+@@ -661,78 +661,205 @@ static int vbg_reset_host_capabilities(struct vbg_dev *gdev)
+ }
+ 
+ /**
+- * Sets the guest capabilities for a session. Takes the session spinlock.
++ * Set guest capabilities on the host.
++ * Must be called with gdev->session_mutex hold.
++ * Return: 0 or negative errno value.
++ * @gdev:			The Guest extension device.
++ * @session:			The session.
++ * @session_termination:	Set if we're called by the session cleanup code.
++ */
++static int vbg_set_host_capabilities(struct vbg_dev *gdev,
++				     struct vbg_session *session,
++				     bool session_termination)
++{
++	struct vmmdev_mask *req;
++	u32 caps;
++	int rc;
++
++	WARN_ON(!mutex_is_locked(&gdev->session_mutex));
++
++	caps = gdev->acquired_guest_caps | gdev->set_guest_caps_tracker.mask;
++
++	if (gdev->guest_caps_host == caps)
++		return 0;
++
++	/* On termination the requestor is the kernel, as we're cleaning up. */
++	req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_SET_GUEST_CAPABILITIES,
++			    session_termination ? VBG_KERNEL_REQUEST :
++						  session->requestor);
++	if (!req) {
++		gdev->guest_caps_host = U32_MAX;
++		return -ENOMEM;
++	}
++
++	req->or_mask = caps;
++	req->not_mask = ~caps;
++	rc = vbg_req_perform(gdev, req);
++	vbg_req_free(req, sizeof(*req));
++
++	gdev->guest_caps_host = (rc >= 0) ? caps : U32_MAX;
++
++	return vbg_status_code_to_errno(rc);
++}
++
++/**
++ * Acquire (get exclusive access) guest capabilities for a session.
++ * Takes the session mutex.
++ * Return: 0 or negative errno value.
++ * @gdev:			The Guest extension device.
++ * @session:			The session.
++ * @flags:			Flags (VBGL_IOC_AGC_FLAGS_XXX).
++ * @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_acquire_session_capabilities(struct vbg_dev *gdev,
++					    struct vbg_session *session,
++					    u32 or_mask, u32 not_mask,
++					    u32 flags, bool session_termination)
++{
++	unsigned long irqflags;
++	bool wakeup = false;
++	int ret = 0;
++
++	mutex_lock(&gdev->session_mutex);
++
++	if (gdev->set_guest_caps_tracker.mask & or_mask) {
++		vbg_err("%s error: cannot acquire caps which are currently set\n",
++			__func__);
++		ret = -EINVAL;
++		goto out;
++	}
++
++	/*
++	 * Mark any caps in the or_mask as now being in acquire-mode. Note
++	 * once caps are in acquire_mode they always stay in this mode.
++	 * This impacts event handling, so we take the event-lock.
++	 */
++	spin_lock_irqsave(&gdev->event_spinlock, irqflags);
++	gdev->acquire_mode_guest_caps |= or_mask;
++	spin_unlock_irqrestore(&gdev->event_spinlock, irqflags);
++
++	/* If we only have to switch the caps to acquire mode, we're done. */
++	if (flags & VBGL_IOC_AGC_FLAGS_CONFIG_ACQUIRE_MODE)
++		goto out;
++
++	not_mask &= ~or_mask; /* or_mask takes priority over not_mask */
++	not_mask &= session->acquired_guest_caps;
++	or_mask &= ~session->acquired_guest_caps;
++
++	if (or_mask == 0 && not_mask == 0)
++		goto out;
++
++	if (gdev->acquired_guest_caps & or_mask) {
++		ret = -EBUSY;
++		goto out;
++	}
++
++	gdev->acquired_guest_caps |= or_mask;
++	gdev->acquired_guest_caps &= ~not_mask;
++	/* session->acquired_guest_caps impacts event handling, take the lock */
++	spin_lock_irqsave(&gdev->event_spinlock, irqflags);
++	session->acquired_guest_caps |= or_mask;
++	session->acquired_guest_caps &= ~not_mask;
++	spin_unlock_irqrestore(&gdev->event_spinlock, irqflags);
++
++	ret = vbg_set_host_capabilities(gdev, session, session_termination);
++	/* Roll back on failure, unless it's session termination time. */
++	if (ret < 0 && !session_termination) {
++		gdev->acquired_guest_caps &= ~or_mask;
++		gdev->acquired_guest_caps |= not_mask;
++		spin_lock_irqsave(&gdev->event_spinlock, irqflags);
++		session->acquired_guest_caps &= ~or_mask;
++		session->acquired_guest_caps |= not_mask;
++		spin_unlock_irqrestore(&gdev->event_spinlock, irqflags);
++	}
++
++	/*
++	 * If we added a capability, check if that means some other thread in
++	 * our session should be unblocked because there are events pending
++	 * (the result of vbg_get_allowed_event_mask_for_session() may change).
++	 *
++	 * HACK ALERT! When the seamless support capability is added we generate
++	 *	a seamless change event so that the ring-3 client can sync with
++	 *	the seamless state.
++	 */
++	if (ret == 0 && or_mask != 0) {
++		spin_lock_irqsave(&gdev->event_spinlock, irqflags);
++
++		if (or_mask & VMMDEV_GUEST_SUPPORTS_SEAMLESS)
++			gdev->pending_events |=
++				VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
++
++		if (gdev->pending_events)
++			wakeup = true;
++
++		spin_unlock_irqrestore(&gdev->event_spinlock, irqflags);
++
++		if (wakeup)
++			wake_up(&gdev->event_wq);
++	}
++
++out:
++	mutex_unlock(&gdev->session_mutex);
++
++	return ret;
++}
++
++/**
++ * Sets the guest capabilities for a session. Takes the session mutex.
+  * 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, when
+-	 * the session is being terminated the requestor is the kernel,
+-	 * as we're cleaning up.
+-	 */
+-	req = vbg_req_alloc(sizeof(*req), VMMDEVREQ_SET_GUEST_CAPABILITIES,
+-			    session_termination ? VBG_KERNEL_REQUEST :
+-						  session->requestor);
+-	if (!req) {
+-		if (!session_termination)
+-			return -ENOMEM;
+-		/* Ignore allocation failure, we must do session cleanup. */
+-	}
++	int ret = 0;
+ 
+ 	mutex_lock(&gdev->session_mutex);
+ 
++	if (gdev->acquire_mode_guest_caps & or_mask) {
++		vbg_err("%s error: cannot set caps which are in acquire_mode\n",
++			__func__);
++		ret = -EBUSY;
++		goto out;
++	}
++
+ 	/* Apply the changes to the session mask. */
+-	previous = session->guest_caps;
+-	session->guest_caps |= or_mask;
+-	session->guest_caps &= ~not_mask;
++	previous = session->set_guest_caps;
++	session->set_guest_caps |= or_mask;
++	session->set_guest_caps &= ~not_mask;
+ 
+ 	/* If anything actually changed, update the global usage counters. */
+-	changed = previous ^ session->guest_caps;
++	changed = previous ^ session->set_guest_caps;
+ 	if (!changed)
+ 		goto out;
+ 
+-	vbg_track_bit_usage(&gdev->guest_caps_tracker, changed, previous);
+-	or_mask = gdev->guest_caps_tracker.mask;
++	vbg_track_bit_usage(&gdev->set_guest_caps_tracker, changed, previous);
+ 
+-	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;
++	ret = vbg_set_host_capabilities(gdev, session, session_termination);
++	/* Roll back on failure, unless it's session termination time. */
++	if (ret < 0 && !session_termination) {
++		vbg_track_bit_usage(&gdev->set_guest_caps_tracker, changed,
++				    session->set_guest_caps);
++		session->set_guest_caps = previous;
+ 	}
+ 
+ out:
+ 	mutex_unlock(&gdev->session_mutex);
+-	vbg_req_free(req, sizeof(*req));
+ 
+ 	return ret;
+ }
+@@ -948,6 +1075,7 @@ void vbg_core_close_session(struct vbg_session *session)
+ 	struct vbg_dev *gdev = session->gdev;
+ 	int i, rc;
+ 
++	vbg_acquire_session_capabilities(gdev, session, 0, U32_MAX, 0, true);
+ 	vbg_set_session_capabilities(gdev, session, 0, U32_MAX, true);
+ 	vbg_set_session_event_filter(gdev, session, 0, U32_MAX, true);
+ 
+@@ -1005,31 +1133,52 @@ static int vbg_ioctl_driver_version_info(
+ 	return 0;
+ }
+ 
++/* Must be called with the event_lock held */
++static u32 vbg_get_allowed_event_mask_for_session(struct vbg_dev *gdev,
++						  struct vbg_session *session)
++{
++	u32 acquire_mode_caps = gdev->acquire_mode_guest_caps;
++	u32 session_acquired_caps = session->acquired_guest_caps;
++	u32 allowed_events = VMMDEV_EVENT_VALID_EVENT_MASK;
++
++	if ((acquire_mode_caps & VMMDEV_GUEST_SUPPORTS_GRAPHICS) &&
++	    !(session_acquired_caps & VMMDEV_GUEST_SUPPORTS_GRAPHICS))
++		allowed_events &= ~VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST;
++
++	if ((acquire_mode_caps & VMMDEV_GUEST_SUPPORTS_SEAMLESS) &&
++	    !(session_acquired_caps & VMMDEV_GUEST_SUPPORTS_SEAMLESS))
++		allowed_events &= ~VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
++
++	return allowed_events;
++}
++
+ 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;
++	events &= vbg_get_allowed_event_mask_for_session(gdev, session);
+ 	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;
+ 
++	events &= vbg_get_allowed_event_mask_for_session(gdev, session);
+ 	gdev->pending_events &= ~events;
+ 	return events;
+ }
+@@ -1149,7 +1298,9 @@ static int vbg_req_allowed(struct vbg_dev *gdev, struct vbg_session *session,
+ 	case VMMDEVREQ_VIDEO_ACCEL_ENABLE:
+ 	case VMMDEVREQ_VIDEO_ACCEL_FLUSH:
+ 	case VMMDEVREQ_VIDEO_SET_VISIBLE_REGION:
++	case VMMDEVREQ_VIDEO_UPDATE_MONITOR_POSITIONS:
+ 	case VMMDEVREQ_GET_DISPLAY_CHANGE_REQEX:
++	case VMMDEVREQ_GET_DISPLAY_CHANGE_REQ_MULTI:
+ 	case VMMDEVREQ_GET_SEAMLESS_CHANGE_REQ:
+ 	case VMMDEVREQ_GET_VRDPCHANGE_REQ:
+ 	case VMMDEVREQ_LOG_STRING:
+@@ -1431,27 +1582,50 @@ static int vbg_ioctl_change_filter_mask(struct vbg_dev *gdev,
+ 					    false);
+ }
+ 
++static int vbg_ioctl_acquire_guest_capabilities(struct vbg_dev *gdev,
++	     struct vbg_session *session,
++	     struct vbg_ioctl_acquire_guest_caps *caps)
++{
++	u32 flags, or_mask, not_mask;
++
++	if (vbg_ioctl_chk(&caps->hdr, sizeof(caps->u.in), 0))
++		return -EINVAL;
++
++	flags = caps->u.in.flags;
++	or_mask = caps->u.in.or_mask;
++	not_mask = caps->u.in.not_mask;
++
++	if (flags & ~VBGL_IOC_AGC_FLAGS_VALID_MASK)
++		return -EINVAL;
++
++	if ((or_mask | not_mask) & ~VMMDEV_GUEST_CAPABILITIES_MASK)
++		return -EINVAL;
++
++	return vbg_acquire_session_capabilities(gdev, session, or_mask,
++						not_mask, flags, 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_GUEST_CAPABILITIES_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.session_caps = session->set_guest_caps;
+ 	caps->u.out.global_caps = gdev->guest_caps_host;
+ 
+ 	return 0;
+@@ -1540,29 +1714,31 @@ int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data)
+ 		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_ACQUIRE_GUEST_CAPABILITIES:
++		return vbg_ioctl_acquire_guest_capabilities(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, session, data);
+ 	}
+ 
+ 	/* Variable sized requests. */
+ 	switch (req_no_size) {
+ #ifdef CONFIG_COMPAT
+ 	case VBG_IOCTL_HGCM_CALL_32(0):
+ 		f32bit = true;
+ #endif
+ 		/* Fall through */
+ 	case VBG_IOCTL_HGCM_CALL(0):
+ 		return vbg_ioctl_hgcm_call(gdev, session, f32bit, data);
+ 	case VBG_IOCTL_LOG(0):
+ 	case VBG_IOCTL_LOG_ALT(0):
+ 		return vbg_ioctl_log(data);
+ 	}
+ 
+-	vbg_debug("VGDrvCommonIoCtl: Unknown req %#08x\n", req);
++	vbg_err_ratelimited("Userspace made an unknown ioctl req %#08x\n", req);
+ 	return -ENOTTY;
+ }
+ 
+diff --git a/drivers/virt/vboxguest/vboxguest_core.h b/drivers/virt/vboxguest/vboxguest_core.h
+index 77c3a9c8255d..ab4bf64e2cec 100644
+--- a/drivers/virt/vboxguest/vboxguest_core.h
++++ b/drivers/virt/vboxguest/vboxguest_core.h
+@@ -118,11 +118,21 @@ struct vbg_dev {
+ 	u32 event_filter_host;
+ 
+ 	/**
+-	 * Usage counters for guest capabilities. Indexed by capability bit
++	 * Guest capabilities which have been switched to acquire_mode.
++	 */
++	u32 acquire_mode_guest_caps;
++	/**
++	 * Guest capabilities acquired by vbg_acquire_session_capabilities().
++	 * Only one session can acquire a capability at a time.
++	 */
++	u32 acquired_guest_caps;
++	/**
++	 * Usage counters for guest capabilities requested through
++	 * vbg_set_session_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;
++	struct vbg_bit_usage_tracker set_guest_caps_tracker;
+ 	/**
+ 	 * The guest capabilities last reported to the host (or UINT32_MAX).
+ 	 * Protected by session_mutex.
+@@ -164,11 +174,16 @@ struct vbg_session {
+ 	 */
+ 	u32 event_filter;
+ 	/**
+-	 * Guest capabilities for this session.
++	 * Guest capabilities acquired by vbg_acquire_session_capabilities().
++	 * Only one session can acquire a capability at a time.
++	 */
++	u32 acquired_guest_caps;
++	/**
++	 * Guest capabilities set through vbg_set_session_capabilities().
+ 	 * A capability claimed by any guest session will be reported to the
+ 	 * host. Protected by vbg_gdev.session_mutex.
+ 	 */
+-	u32 guest_caps;
++	u32 set_guest_caps;
+ 	/** VMMDEV_REQUESTOR_* flags */
+ 	u32 requestor;
+ 	/** Set on CANCEL_ALL_WAITEVENTS, protected by vbg_devevent_spinlock. */
+diff --git a/drivers/virt/vboxguest/vboxguest_utils.c b/drivers/virt/vboxguest/vboxguest_utils.c
+index 43c391626a00..b6fd06eb015e 100644
+--- a/drivers/virt/vboxguest/vboxguest_utils.c
++++ b/drivers/virt/vboxguest/vboxguest_utils.c
+@@ -58,6 +58,7 @@ EXPORT_SYMBOL(name)
+ VBG_LOG(vbg_info, pr_info);
+ VBG_LOG(vbg_warn, pr_warn);
+ VBG_LOG(vbg_err, pr_err);
++VBG_LOG(vbg_err_ratelimited, pr_err_ratelimited);
+ #if defined(DEBUG) && !defined(CONFIG_DYNAMIC_DEBUG)
+ VBG_LOG(vbg_debug, pr_debug);
+ #endif
+diff --git a/include/linux/vbox_utils.h b/include/linux/vbox_utils.h
+index ff56c443180c..db8a7d118093 100644
+--- a/include/linux/vbox_utils.h
++++ b/include/linux/vbox_utils.h
+@@ -16,6 +16,7 @@ struct vbg_dev;
+ __printf(1, 2) void vbg_info(const char *fmt, ...);
+ __printf(1, 2) void vbg_warn(const char *fmt, ...);
+ __printf(1, 2) void vbg_err(const char *fmt, ...);
++__printf(1, 2) void vbg_err_ratelimited(const char *fmt, ...);
+ 
+ /* Only use backdoor logging for non-dynamic debug builds */
+ #if defined(DEBUG) && !defined(CONFIG_DYNAMIC_DEBUG)
+diff --git a/include/uapi/linux/vbox_vmmdev_types.h b/include/uapi/linux/vbox_vmmdev_types.h
+index c27289fd619a..f8a8d6b3c521 100644
+--- a/include/uapi/linux/vbox_vmmdev_types.h
++++ b/include/uapi/linux/vbox_vmmdev_types.h
+@@ -63,6 +63,7 @@ enum vmmdev_request_type {
+ 	VMMDEVREQ_SET_GUEST_CAPABILITIES       = 56,
+ 	VMMDEVREQ_VIDEMODE_SUPPORTED2          = 57, /* since version 3.2.0 */
+ 	VMMDEVREQ_GET_DISPLAY_CHANGE_REQEX     = 80, /* since version 4.2.4 */
++	VMMDEVREQ_GET_DISPLAY_CHANGE_REQ_MULTI = 81,
+ 	VMMDEVREQ_HGCM_CONNECT                 = 60,
+ 	VMMDEVREQ_HGCM_DISCONNECT              = 61,
+ 	VMMDEVREQ_HGCM_CALL32                  = 62,
+@@ -92,6 +93,8 @@ enum vmmdev_request_type {
+ 	VMMDEVREQ_WRITE_COREDUMP               = 218,
+ 	VMMDEVREQ_GUEST_HEARTBEAT              = 219,
+ 	VMMDEVREQ_HEARTBEAT_CONFIGURE          = 220,
++	VMMDEVREQ_NT_BUG_CHECK                 = 221,
++	VMMDEVREQ_VIDEO_UPDATE_MONITOR_POSITIONS = 222,
+ 	/* Ensure the enum is a 32 bit data-type */
+ 	VMMDEVREQ_SIZEHACK                     = 0x7fffffff
+ };
+diff --git a/include/uapi/linux/vboxguest.h b/include/uapi/linux/vboxguest.h
+index f79d7abe27db..15125f6ec60d 100644
+--- a/include/uapi/linux/vboxguest.h
++++ b/include/uapi/linux/vboxguest.h
+@@ -257,6 +257,30 @@ VMMDEV_ASSERT_SIZE(vbg_ioctl_change_filter, 24 + 8);
+ 	_IOWR('V', 12, struct vbg_ioctl_change_filter)
+ 
+ 
++/** VBG_IOCTL_ACQUIRE_GUEST_CAPABILITIES data structure. */
++struct vbg_ioctl_acquire_guest_caps {
++	/** The header. */
++	struct vbg_ioctl_hdr hdr;
++	union {
++		struct {
++			/** Flags (VBGL_IOC_AGC_FLAGS_XXX). */
++			__u32 flags;
++			/** Capabilities to set (VMMDEV_GUEST_SUPPORTS_XXX). */
++			__u32 or_mask;
++			/** Capabilities to drop (VMMDEV_GUEST_SUPPORTS_XXX). */
++			__u32 not_mask;
++		} in;
++	} u;
++};
++VMMDEV_ASSERT_SIZE(vbg_ioctl_acquire_guest_caps, 24 + 12);
++
++#define VBGL_IOC_AGC_FLAGS_CONFIG_ACQUIRE_MODE		0x00000001
++#define VBGL_IOC_AGC_FLAGS_VALID_MASK			0x00000001
++
++#define VBG_IOCTL_ACQUIRE_GUEST_CAPABILITIES \
++	_IOWR('V', 13, struct vbg_ioctl_acquire_guest_caps)
++
++
+ /** VBG_IOCTL_CHANGE_GUEST_CAPABILITIES data structure. */
+ struct vbg_ioctl_set_guest_caps {
+ 	/** The header. */