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Re: [Xen-devel] [PATCH v1] x86: Restore IA32_MISC_ENABLE on wakeup
- To: Michał Kowalczyk <mkow@xxxxxxxxxxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 19 Aug 2019 18:28:43 +0100
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- Cc: Wei Liu <wl@xxxxxxx>, Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Mon, 19 Aug 2019 17:28:52 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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On 19/08/2019 14:56, Michał Kowalczyk wrote:
> On 8/19/19 3:52 PM, Andrew Cooper wrote:
>> On 19/08/2019 14:50, Michał Kowalczyk wrote:
>>> On 8/19/19 11:04 AM, Andrew Cooper wrote:
>>>> On 19/08/2019 03:23, Michał Kowalczyk wrote:
>>>>> diff --git a/xen/arch/x86/boot/trampoline.S
>>>>> b/xen/arch/x86/boot/trampoline.S
>>>>> index 7c6a2328d2..fcaa3eeaf1 100644
>>>>> --- a/xen/arch/x86/boot/trampoline.S
>>>>> +++ b/xen/arch/x86/boot/trampoline.S
>>>>> @@ -85,7 +85,7 @@ trampoline_gdt:
>>>>> .long trampoline_gdt + BOOT_PSEUDORM_DS + 2 - .
>>>>> .popsection
>>>>>
>>>>> -GLOBAL(trampoline_misc_enable_off)
>>>>> +GLOBAL(misc_enable_off)
>>>> The overall change is fine, but why have you renamed this variable?
>>> The old name had "trampoline_" prefix because the only place where it
>>> was used was trampoline_protmode_entry in arch/x86/boot/trampoline.S.
>>> Now it's also used in the wakeup code, so I removed the prefix which
>>> could be (IMO) misleading.
>>>> Without the rename, the patch would be just the single hunk in wakeup.S
>>>> and therefore easier to backport.
>>> True. Anyway, the decision is on your side, I can leave the old name if
>>> you prefer.
>> The trampoline_ prefix indicates where the data lives, which is in the
>> 16 bit trampoline which contains both the AP boot path, and wakeup path.
> Ah, if this is the convention you use then we should leave the old name.
>> If you're happy with this, I can adjust on commit to avoid you sending a
>> second time.
> Would be great, thanks!
Done.
https://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=c3cfa5b3084d71bccd8360d044bea813688b587c
~Andrew
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