From: Chris Wilson Date: Wed, 9 Nov 2016 10:39:05 +0000 (+0000) Subject: drm/i915/gvt: Disable access to stolen memory as a guest X-Git-Tag: v4.11-rc1~83^2~11^2~2 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=ddd09373628adcbdc3f7b9098d22328834f8d772;p=linux.git drm/i915/gvt: Disable access to stolen memory as a guest 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 Cc: Zhenyu Wang Cc: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/20161109103905.17860-1-chris@chris-wilson.co.uk Reviewed-by: Zhenyu Wang Cc: stable@vger.kernel.org (cherry picked from commit 04a68a35ce6d7b54749989f943993020f48fed62) Signed-off-by: Jani Nikula --- diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c index ec7c5d80fe4f..9673bcc3b6ad 100644 --- a/drivers/gpu/drm/i915/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c @@ -405,6 +405,11 @@ 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");