Re: [PATCH 1/6] xen/x86/pvh: Save %rbx in xen_pvh_early_cpu_init()

[Boris Ostrovsky <boris.ostrovsky@oracle.com>]

On 07/07/2015 04:26 PM, Konrad Rzeszutek Wilk wrote:
>>> diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
>>> index 8afdfcc..b1508a8 100644
>>> --- a/arch/x86/xen/xen-head.S
>>> +++ b/arch/x86/xen/xen-head.S
>>> @@ -56,28 +56,28 @@ ENTRY(startup_xen)
>>>    * @entry: true if this is a secondary vcpu coming up on this entry
>>>    *         point, false if this is the boot CPU being initialized for
>>>    *         the first time (%rsi)
>>> - *
>>> - * Note: This is called as a function on the boot CPU, and is the entry point
>>> - *       on the secondary CPU.
>>>    */
>>>   ENTRY(xen_pvh_early_cpu_init)
>>> -	mov     %rsi, %r11
>>> +	mov	%rbx, -8(%rsp)
>>>   
>>> +/* Entry point for secondary CPUs */
> Actually, could you do this (since the BSP can access the stack and
> it can do jumps) - not compile tested:

Yes, this looks better, I'll try it. Thanks.

-boris