Another oddity associated with gen4 desktop is that some machines experience swizzling corruption across swapping. Typically this would imply that those machines have bit17 swizzling (where the swizzle depends upon the physical address of the page). Play it safe and apply the bit17 quirk to keep unknown swizzle pages pinned.
References: https://bugs.freedesktop.org/show_bug.cgi?id=90725 Signed-off-by: Chris Wilson <[email protected]> Cc: [email protected] --- drivers/gpu/drm/i915/i915_gem_fence.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_fence.c b/drivers/gpu/drm/i915/i915_gem_fence.c index 6ba68083aa95..b5ae97c3d3b2 100644 --- a/drivers/gpu/drm/i915/i915_gem_fence.c +++ b/drivers/gpu/drm/i915/i915_gem_fence.c @@ -687,6 +687,10 @@ i915_gem_detect_bit_6_swizzle(struct drm_device *dev) dev_priv->mm.bit_6_swizzle_x = swizzle_x; dev_priv->mm.bit_6_swizzle_y = swizzle_y; + + if (swizzle_x == I915_BIT_6_SWIZZLE_UNKNOWN || + swizzle_y == I915_BIT_6_SWIZZLE_UNKNOWN) + dev_priv->quirks |= QUIRK_PIN_SWIZZLED_PAGES; } /* -- 2.6.2 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
