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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: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Julien Grall <julien.grall@xxxxxxx>
- Date: Fri, 21 Dec 2018 10:53:39 +0000
- 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: Fri, 21 Dec 2018 10:53:54 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Hi,
On 20/12/2018 22:59, Andrew Cooper wrote:
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.
Thank you! I have now committed this patch.
Cheers,
--
Julien Grall
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