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Re: [Xen-devel] [PATCH for-4.12 v2 1/8] xen/page_alloc: Move get_pg_owner()/put_pg_owner() from x86 to common code
- To: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Thu, 20 Dec 2018 22:59:44 +0000
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- Cc: Wei Liu <wei.liu2@xxxxxxxxxx>, Benjamin Sanda <ben.sanda@xxxxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Thu, 20 Dec 2018 23:00:04 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 20/12/2018 22:53, Stefano Stabellini wrote:
>
>> diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
>> index 2c6509e3a0..edb93b8ada 100644
>> --- a/xen/common/page_alloc.c
>> +++ b/xen/common/page_alloc.c
>> @@ -2509,6 +2510,43 @@ static __init int register_heap_trigger(void)
>> }
>> __initcall(register_heap_trigger);
>>
>> +struct domain *get_pg_owner(domid_t domid)
>> +{
>> + struct domain *pg_owner = NULL, *curr = current->domain;
>> +
>> + if ( likely(domid == DOMID_SELF) )
>> + {
>> + pg_owner = rcu_lock_current_domain();
>> + goto out;
>> + }
>> +
>> + if ( unlikely(domid == curr->domain_id) )
>> + {
>> + gdprintk(XENLOG_WARNING, "Cannot specify itself as foreign
>> domain\n");
>> + goto out;
>> + }
>> +
>> + switch ( domid )
>> + {
>> + case DOMID_IO:
>> + pg_owner = rcu_lock_domain(dom_io);
>> + break;
Newline.
>> + case DOMID_XEN:
>> + pg_owner = rcu_lock_domain(dom_xen);
>> + break;
Newline.
>> + default:
>> + if ( (pg_owner = rcu_lock_domain_by_id(domid)) == NULL )
>> + {
>> + gdprintk(XENLOG_WARNING, "Unknown domain d%d\n", domid);
>> + break;
>> + }
>> + break;
if ( (pg_owner = rcu_lock_domain_by_id(domid)) == NULL )
gdprintk(XENLOG_WARNING, "Unknown domain d%d\n", domid);
break;
All trivial, so Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
and please fix on commit.
~Andrew
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