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Linux panic if the VGA region isn't reserved. When Linux is booted on EFI system, it expects the memory at 0xa0000 to _not_ be conventional memory. Otherwise a variable isn't initialised properly and Linux panic when a virtual console/terminal is asked to be created. See for more detail: https://lists.xenproject.org/archives/html/xen-devel/2019-03/msg02139.html Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689 Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20190813113119.14804-25-anthony.perard@citrix.com>