The issue was found on AMD machine when run lk with qemu kvm, it
can't boot if kvm hardware is enable in qemu.
According to Intel system programming guild Chapter 4 "Paging",
if the page table entry is non-leaf entry, then the G bit will be
ignored.
However, According to AMD programmer mannul Volume 2, Chapter 5.3
"Long-Mode Page Translation", the non-leaf page table entry G bit
must be zero.
The patch sets inner page table entry G bit to zero so that it
works on both Intel and AMD CPU
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