Patch "drm/i915/gvt: Disable access to stolen memory as a guest" has been added to the 4.4-stable tree

From 04a68a35ce6d7b54749989f943993020f48fed62 Mon Sep 17 00:00:00 2001

This is a note to let you know that I've just added the patch titled

drm/i915/gvt: Disable access to stolen memory as a guest

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-i915-gvt-disable-access-to-stolen-memory-as-a-guest.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From 04a68a35ce6d7b54749989f943993020f48fed62 Mon Sep 17 00:00:00 2001

From: Chris Wilson <[email protected]>
Date: Wed, 9 Nov 2016 10:39:05 +0000
Subject: drm/i915/gvt: Disable access to stolen memory as a guest

From: Chris Wilson <[email protected]>

commit 04a68a35ce6d7b54749989f943993020f48fed62 upstream.

Explicitly disable stolen memory when running as a guest in a virtual machine, since the memory is not mediated between clients and reserved entirely for the host. The actual size should be reported as zero, but like every other quirk we want to tell the user what is happening.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99028

Signed-off-by Chris Wilson <[email protected]>

Cc Zhenyu Wang <[email protected]>

Cc Joonas Lahtinen <[email protected]>

Link http://patchwork.freedesktop.org/patch/msgid/[email protected]

Reviewed-by Zhenyu Wang <[email protected]>

Signed-off-by Greg Kroah-Hartman <[email protected]>

---
 drivers/gpu/drm/i915/i915_gem_stolen.c |    5 +++++
 1 file changed, 5 insertions(+)

drivers/gpu/drm/i915/i915_gem_stolen.c +5 -0

@@ -405,6 +405,11 @@ int i915_gem_init_stolen(struct drm_devi
 
 	mutex_init(&dev_priv->mm.stolen_lock);
 
+	if (intel_vgpu_active(dev_priv)) {
+		DRM_INFO("iGVT-g active, disabling use of stolen memory\n");
+		return 0;
+	}
+
 #ifdef CONFIG_INTEL_IOMMU
 	if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) {
 		DRM_INFO("DMAR active, disabling use of stolen memory\n");

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/drm-i915-gvt-disable-access-to-stolen-memory-as-a-guest.patch