Re: [PATCH] x86_64: Reload CS when startup_64 is used.

[Eric W. Biederman]

Andi Kleen <ak@xxxxxxx> writes:

> On Tue, 22 Aug 2006 02:37:44 -0600
> ebiederm@xxxxxxxxxxxx (Eric W. Biederman) wrote:
>
>> 
>> In long mode the %cs is largely a relic.  However there are a few cases
>> like lret 
>
> You mean iret?

Yes, sorry.

>
>> +	 * jump.  In addition we need to ensure %cs is set so we make this
>> +	 * a far return.	
>>  	 */
>>  	movq	initial_code(%rip),%rax
>> -	jmp	*%rax
>> +	pushq	$__KERNEL_CS
>> +	pushq	%rax
>> +	lretq
>
> Ok merged thanks
>
> -Andi
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