Mikael Pettersson <[EMAIL PROTECTED]> writes: > Maybe not. I had a look in Intel's SDM Vol3, and the > section "switching to protected mode" specifies that > a move to %cr0 that sets PE should immediately be > followed by a far jmp or call. They write that "random > failures can occur if other instructions exist between > [the move to %cr0] and [the far jmp/call]". The current > version of pmjump.S does exactly that: it executes > a bunch of moves to segment registers in that window.
iirc various Intel VT hypervisor implementations also have trouble with not following this restriction. At least in the early Xen days it was a frequent reason for boot failure. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
