linux-kernel - Re: [PATCH] xen/pvhvm: add soft reset on kexec/kdump support

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Message-ID: <560581B4.3070107@oracle.com>
Date:	Fri, 25 Sep 2015 13:17:40 -0400
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	Vitaly Kuznetsov <vkuznets@...hat.com>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	xen-devel@...ts.xenproject.org, x86@...nel.org,
	David Vrabel <david.vrabel@...rix.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] xen/pvhvm: add soft reset on kexec/kdump support

On 09/25/2015 12:07 PM, Vitaly Kuznetsov wrote:
>> Also, I am not sure I see how this new op will be used in the
>> hypervisor --- currently AFAICS it is only processed under
>> is_hardware_domain(). Are there other patches that will support HVM
>> guests?
> Please see my Xen series:
> http://lists.xenproject.org/archives/html/xen-devel/2015-09/msg00547.html
> (last 'full' submission).
>
> All patches from my 'toolstack-assisted approach to PVHVM guest kexec'
> are already merged to xen.git (first 10 are already in 'master' and the
> last one is in 'staging').
>


OK, so I was looking at the right tree. Then I don't understand how 
SHUTDOWN_soft_reset would be reached for a non-privileged domain. The 
only path that I see is

     domain_shutdown()
     {
         ...
         if ( is_hardware_domain(d) )
             hwdom_shutdown(reason);
         ...
     }

Is there another path to handle this op?

Thanks.
-boris
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