Re: [RFC PATCH] x86: Make sure verify_cpu has a good stack

[Yinghai Lu]

On Wed, Mar 2, 2016 at 4:13 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
> On Wed, Mar 2, 2016 at 2:32 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
>>
>> I'm trying to think of any reason why we couldn't simply have a symbol at the top of the initial stack?  Then a simple leaq would suffice; this is for the BSP after all.
>
> Why do we need to call verify_cpu in arch/x86/kernel/head_64.S aka the
> vmlinux again ?
>
> Is that already called in arch/x86/boot/compressed/head_64.S?

that calling is from startup_32, so may add another calling in startup_64,
so can avoid calling from arch/x86/kernel/head_64.S

>
> Or Tom is using 64bit bootloader that use vmlinux instead of bzImage?