linux-kernel - Re: [Xen-devel] [PATCH-v2] xen: Don't call arch_trigger_all_cpu

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Message-ID: <519349F1.8050607@oracle.com>
Date:	Wed, 15 May 2013 16:40:17 +0800
From:	Zhenzhong Duan <zhenzhong.duan@...cle.com>
To:	Ian Campbell <Ian.Campbell@...rix.com>
CC:	Jan Beulich <JBeulich@...e.com>,
	xen-devel <xen-devel@...ts.xen.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Tamon Shiose <tamon.shiose@...cle.com>,
	Feng Jin <joe.jin@...cle.com>
Subject: Re: [Xen-devel] [PATCH-v2] xen: Don't call arch_trigger_all_cpu_backtrace
 in dom0(pvm)


On 2013-04-10 00:36, Ian Campbell wrote:
> On Mon, 2013-04-08 at 08:42 +0100, Jan Beulich wrote:
>>>>> On 07.04.13 at 07:54, Zhenzhong Duan <zhenzhong.duan@...cle.com> wrote:
>>> nmi isn't supported in dom0, fallback to general all cpu backtrace code.
>> Since when is sending NMIs not supported, and since when is this
>> Dom0-specific? If you want to deal with this, you should do so
>> properly: Special case sending NMIs in the respective Xen specific
>> code (using VCPUOP_send_nmi), and carry this out in a way not
>> dependent upon running (un)privileged.
> You'd also need to implement the upcall support for receiving NMIs,
> which IIRC isn't yet done for pvops.
Hi Ian,

Could you give a suggestion on which file to change to support NMI upcall?
I compare with vMCE code, made similar change.
Use VCPUOP_send_nmi to send nmi between pvm guest vcpus, but nmi isn't 
triggered.

thanks
zduan
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