Re: [PATCH 08/62] x86/boot/compressed/64: Add IDT Infrastructure

[Andi Kleen]

Joerg Roedel <joro@xxxxxxxxxx> writes:
> +	addq    $8, %rsp
> +
> +	/*
> +	 * Make sure we return to __KERNEL_CS - the CS selector on
> +	 * the IRET frame might still be from an old BIOS GDT
> +	 */
> +	movq	$__KERNEL_CS, 8(%rsp)

This doesn't make sense. Either it's running on the correct CS
before the exception or not. Likely there's some other problem
here that you patched over with this hack.

-Andi