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[PATCH 2/9] xen/arm: introduce PGC_reserved
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>, <sstabellini@xxxxxxxxxx>, <julien@xxxxxxx>, <jbeulich@xxxxxxxx>
- From: Penny Zheng <penny.zheng@xxxxxxx>
- Date: Mon, 7 Jun 2021 02:43:11 +0000
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- Cc: <Bertrand.Marquis@xxxxxxx>, <Penny.Zheng@xxxxxxx>, <Wei.Chen@xxxxxxx>
- Delivery-date: Mon, 07 Jun 2021 02:44:03 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Nodisclaimer: true
In order to differentiate pages of static memory, from those allocated from
heap, this patch introduces a new page flag PGC_reserved to tell.
Signed-off-by: Penny Zheng <penny.zheng@xxxxxxx>
---
changes v2:
- remove unused reserved field in struct page_info
- remove unused helper page_get_reserved_owner and page_set_reserved_owner
---
xen/include/asm-arm/mm.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h
index 0b7de3102e..7034fae1b6 100644
--- a/xen/include/asm-arm/mm.h
+++ b/xen/include/asm-arm/mm.h
@@ -108,6 +108,9 @@ struct page_info
/* Page is Xen heap? */
#define _PGC_xen_heap PG_shift(2)
#define PGC_xen_heap PG_mask(1, 2)
+ /* Page is reserved */
+#define _PGC_reserved PG_shift(3)
+#define PGC_reserved PG_mask(1, 3)
/* ... */
/* Page is broken? */
#define _PGC_broken PG_shift(7)
--
2.25.1
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