Re: [RFC v2 02/26] mm/asi: Abort isolation on interrupt, exception and context switch

[Andi Kleen]

Alexandre Chartre <alexandre.chartre@xxxxxxxxxx> writes:
>  	jmp	paranoid_exit
> @@ -1182,6 +1196,16 @@ ENTRY(paranoid_entry)
>  	xorl	%ebx, %ebx
>  
>  1:
> +#ifdef CONFIG_ADDRESS_SPACE_ISOLATION
> +	/*
> +	 * If address space isolation is active then abort it and return
> +	 * the original kernel CR3 in %r14.
> +	 */
> +	ASI_START_ABORT_ELSE_JUMP 2f
> +	movq	%rdi, %r14
> +	ret
> +2:
> +#endif

Unless I missed it you don't map the exception stacks into ASI, so it
has likely already triple faulted at this point.

-Andi