Commit cdb4f19a authored by Chris Wilson's avatar Chris Wilson Committed by Greg Kroah-Hartman

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

commit ddd09373 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=99028Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161109103905.17860-1-chris@chris-wilson.co.ukReviewed-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
(cherry picked from commit 04a68a35)
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f7189c6b
......@@ -414,6 +414,11 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
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_GEN(dev_priv) < 8) {
DRM_INFO("DMAR active, disabling use of stolen memory\n");
......
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