Backport upstream kernel patch to fix Dom0''s bad pte bug.
- In Dom0 kernel, at boot time, system will call bt_ioremap() to do mappings
for the Boot Time Fix Memory region. Also system will call bt_iounmap() to unmap
the memory region by setting phys=0. In this case, system will encounter
pte_ERROR(). This patch backports the upstream kernel patch by Ingo Molnar
<mingo@elte.hu>, with commit: 70c9f590ffc3f959cc81c1a3cecb6b8133caf35d
Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Best Regards,
-- Dongxiao
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