[Xen-devel] loading IDT in xen?

["Jun Koi" <junkoi2004@xxxxxxxxx>]

I am looking at the hypervisor code to see how Xen setup the IDT. But
it seems that the code in protected mode reuses the real mode IDT?

In arch/x86/boot/trampoline.S we have at several places:

lidt bootsym(idt_48)

And idt_48 is defined as:

idt_48: .word 0,0,0 # base = limit = 0

And in nowhere we initialize idt_48, which means idt_48 reuses real
mode IDT table. However, real mode IDT table has different format than
protected mode IDT, so this doesnt look to work for me.

Definitely I miss something here. Anybody could enlighten me how IDT
setting in protected mode work?

Thanks,
Jun

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