Re: [Xen-devel] [PATCH v8 10/13] x86/xen: Bypass intr mode setup in enlighten_pv system

From	Dou Liyang <douly.fnst@cn.fujitsu.com>
Newsgroups	linux.kernel
Subject	Re: [Xen-devel] [PATCH v8 10/13] x86/xen: Bypass intr mode setup in enlighten_pv system
Date	2017-08-28 07:20 +0200
Message-ID	<ujkCS-1lB-11@gated-at.bofh.it> (permalink)
References	<ujiUp-f2-5@gated-at.bofh.it> <ujiUq-f2-17@gated-at.bofh.it> <ujjQt-Pw-7@gated-at.bofh.it> <ujk09-Su-3@gated-at.bofh.it>
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Hi Juergen,

At 08/28/2017 12:32 PM, Juergen Gross wrote:
> On 28/08/17 06:25, Juergen Gross wrote:
>> On 28/08/17 05:20, Dou Liyang wrote:
>>> XEN PV overrides smp_prepare_cpus(). xen_pv_smp_prepare_cpus()
>>> initializes interrupts in the XEN PV specific way and does not invoke
>>> native_smp_prepare_cpus(). As a consequence, x86_init.intr_mode_init() is
>>> not invoked either.
>>>
>>> The invocation of x86_init.intr_mode_init() will be moved from
>>> native_smp_prepare_cpus() in a follow up patch to solve <INSERT
>>> REASON/PROBLEM>.
>>
>> Can you be a little bit more precise here, please? :-)
>>
>>> That move would cause the invocation of x86_init.intr_mode_init() for XEN
>>> PV platforms. To prevent that, override the default x86_init.
>>> intr_mode_init() callback with a noop().
>>>
>>> [Rewrited by Thomas Gleixner <tglx@linutronix.de>]
>>>
>>> Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
>>> Cc: xen-devel@lists.xenproject.org
>>> Cc: boris.ostrovsky@oracle.com
>>
>> On which tree does this apply? Would be nice to get a hint against which
>> source this can be reviewed.
>
> Aah, just found the rest of the series. In case a single patch of a
> series isn't stand alone it would be nice to receive at least the cover
> letter of the series in order to know what its all about.
>
Sorry to confuse you, It's my fault.

Thank you for your reply. I understood. will CC the cover letter to
linux-xen and linux-acpi.

Thanks,
	dou.

>
> Juergen
>
>
>

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[PATCH v8 10/13] x86/xen: Bypass intr mode setup in enlighten_pv system Dou Liyang <douly.fnst@cn.fujitsu.com> - 2017-08-28 05:30 +0200
  Re: [Xen-devel] [PATCH v8 10/13] x86/xen: Bypass intr mode setup in  enlighten_pv system Juergen Gross <jgross@suse.com> - 2017-08-28 06:30 +0200
    Re: [Xen-devel] [PATCH v8 10/13] x86/xen: Bypass intr mode setup in  enlighten_pv system Juergen Gross <jgross@suse.com> - 2017-08-28 06:40 +0200
      Re: [Xen-devel] [PATCH v8 10/13] x86/xen: Bypass intr mode setup in  enlighten_pv system Dou Liyang <douly.fnst@cn.fujitsu.com> - 2017-08-28 07:20 +0200

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