From mboxrd@z Thu Jan  1 00:00:00 1970
From: Don Slutz <don.slutz@gmail.com>
Subject: Re: [PATCH 1/2] gdbsx_guestmemio: Allow it to check
	domain.
Date: Thu, 18 Jun 2015 16:39:50 -0400
Message-ID: <55832C96.5030501@Gmail.com>
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To: Andrew Cooper <andrew.cooper3@citrix.com>, Don Slutz <dslutz@verizon.com>, xen-devel@lists.xen.org
Cc: Keir Fraser <keir@xen.org>, Ian Campbell <ian.campbell@citrix.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Tim Deegan <tim@xen.org>, Ian Jackson <ian.jackson@eu.citrix.com>, "security@xenproject.org" <security@xenproject.org>, Jan Beulich <jbeulich@suse.com>, Wei Liu <wei.liu2@citrix.com>, Mukesh Rathor <mukesh.rathor@oracle.com>
List-Id: xen-devel@lists.xenproject.org

On 06/18/15 12:59, Andrew Cooper wrote:
> On 18/06/15 16:55, Don Slutz wrote:
>> gdbsx_guest_mem_io() does not get d passed, it expects to handle
>> the domain lookup itself.
>>
>> Signed-off-by: Don Slutz <dslutz@verizon.com>
>> CC: Don Slutz <don.slutz@gmail.com>
> 
> As for the change itself, Reviewed-by: Andrew Cooper
> <andrew.cooper3@citrix.com>
> 
> However, I think the commit message needs improving.  Specifically, the
> caller of XEN_DOMCTL_gdbsx_guestmemio is expected to use DOMID_IDLE to
> interact with the hypervisor, rather than a domain, which doesn't
> interact well with with the domain rcu lock.

I am happy to change it to:

Specifically, the caller of XEN_DOMCTL_gdbsx_guestmemio is expected to
use DOMID_IDLE to interact with the hypervisor, rather than a domain,
which doesn't interact well with with the domain rcu lock.

Do you want me to add:

(h/t to Andrew Cooper for the patch summary.)

  -Don Slutz

> 
>> ---
>>  xen/common/domctl.c | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/xen/common/domctl.c b/xen/common/domctl.c
>> index ce517a7..2a2d203 100644
>> --- a/xen/common/domctl.c
>> +++ b/xen/common/domctl.c
>> @@ -443,6 +443,7 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
>>      case XEN_DOMCTL_createdomain:
>>      case XEN_DOMCTL_getdomaininfo:
>>      case XEN_DOMCTL_test_assign_device:
>> +    case XEN_DOMCTL_gdbsx_guestmemio:
>>          d = NULL;
>>          break;
>>      default:
>