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[PATCH 2/4] x86/PoD: HVM guests can't pin their pages
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 1 Dec 2021 11:53:36 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>
- Delivery-date: Wed, 01 Dec 2021 10:53:55 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Pinning is a PV concept, used there only for page table pages.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
I'm actually inclined to hide _PGT_pinned in !HVM builds; the downside
of doing so is some new #ifdef-ary which would need adding.
--- a/xen/arch/x86/mm/p2m-pod.c
+++ b/xen/arch/x86/mm/p2m-pod.c
@@ -260,9 +260,6 @@ p2m_pod_set_cache_target(struct p2m_doma
goto out;
}
- if ( test_and_clear_bit(_PGT_pinned, &(page+i)->u.inuse.type_info)
)
- put_page_and_type(page + i);
-
put_page_alloc_ref(page + i);
put_page(page + i);
|
