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Commit 5a597b22 authored by Chris Wilson's avatar Chris Wilson Committed by Greg Kroah-Hartman
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drm/i915/gvt: Disable access to stolen memory as a guest 

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: 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.uk


Reviewed-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1489183c

drivers/gpu/drm/i915/i915_gem_stolen.c

+5 −0
Original line number Diff line number Diff line
@@ -420,6 +420,11 @@ int i915_gem_init_stolen(struct drm_device *dev) 
		return 0;

	}



	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");