Re: [PATCH 1/2] gdbsx_guestmemio: Allow it to check domain.

[Don Slutz <don.slutz@gmail.com>]

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:
>