Re: [PATCH, DEBUG] x86/32: Add small delay after resume

[H. Peter Anvin]

On 06/15/2015 09:10 AM, Srinivas Pandruvada wrote:
>>
>> So is it true that we always execute wakeup_pmode_return first after we return 
>> from the BIOS?
>>
>> If so then the BIOS touching DS cannot be an issue, as we re-initialize all 
>> segment selectors, which reloads the descriptors:
>>
>> ENTRY(wakeup_pmode_return)
>> wakeup_pmode_return:
>>         movw    $__KERNEL_DS, %ax
>>         movw    %ax, %ss
>>         movw    %ax, %ds
>>         movw    %ax, %es
>>         movw    %ax, %fs
>>         movw    %ax, %gs
>>
>>         # reload the gdt, as we need the full 32 bit address
>>         lidt    saved_idt
>>         lldt    saved_ldt
>>         ljmp    $(__KERNEL_CS), $1f
>>

Where does the GDT get initialized?

	-hpa


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