linux-kernel - Re: [RFC PATCH 1/6] x86/apic: Replace init_bsp_APIC() with apic_virture_wire_mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 6 Apr 2017 09:37:59 +0800
From:   Dou Liyang <douly.fnst@...fujitsu.com>
To:     Thomas Gleixner <tglx@...utronix.de>
CC:     <x86@...nel.org>, <linux-kernel@...r.kernel.org>,
        <mingo@...nel.org>, <ebiederm@...ssion.com>, <bhe@...hat.com>,
        <hpa@...or.com>, <izumi.taku@...fujitsu.com>
Subject: Re: [RFC PATCH 1/6] x86/apic: Replace init_bsp_APIC() with
 apic_virture_wire_mode_setup()

Hi Thomas,

At 04/05/2017 06:50 PM, Thomas Gleixner wrote:
> On Wed, 5 Apr 2017, Thomas Gleixner wrote:
>
>> On Wed, 29 Mar 2017, Dou Liyang wrote:
>>
>>> The init_bsp_APIC() setups the virtual wire mode through the local
>>> APIC.
>>>
>>> The function name is unsuitable which might imply that the BSP's
>>> APIC will be initialized here, actually, where it will be done is
>>> almost at the end of start_kernel(). And the CONFIG X86_64 is also
>>> imply the X86_LOCAL_APIC is y.
>>
>> Correct, but X86_32 can have X86_LOCAL_APIC=n. And by removing the ifdefs
>> you break that.
>
> Oops. Sorry, the function is replaced by an empty stub for the APIC=n
> case. So that's correct.
>

I forgot to clear it in the change log. I will add this comment to the
change log.

Thanks,
	Liyang

>>>  /*
>>> - * An initial setup of the virtual wire mode.
>>> + * Setup the through-local-APIC virtual wire mode.
>>>   */
>>> -void __init init_bsp_APIC(void)
>>> +void apic_virture_wire_mode_setup(void)
>>
>> s/virture/virtual/ ?
>>
>> Why is this function not longer marked __init ?
>>
>> Thanks,
>>
>> 	tglx
>>
>
>
>