From 35541782dcc1e502d1864075eded7b3bb23b7268 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 11 Oct 2013 10:01:10 +0200
Subject: [PATCH] drm/qxl: support 64bit surface bar

qxl devices can have a 64bit surface bar, which is quite handy if
you need a bit more surface memory.  So try to use it if it is
present.  Note that this bar might be mapped above 4g.

QEMU command line to check that out:

    qemu-system-x86_64 -m 4g \
        -vga qxl -global qxl-vga.vram64_size_mb=512 \
        $otheroptions

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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