[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH V3 06/10] xen/arm: introduce PGC_reserved
This patch introduces a new page flag PGC_reserved in order to differentiate pages of static memory from those allocated from heap. Mark pages of static memory PGC_reserved when initializing them. Signed-off-by: Penny Zheng <penny.zheng@xxxxxxx> --- v3 change: - introduce PGC_reserved when it is firstly used. --- xen/common/page_alloc.c | 3 +++ xen/include/asm-arm/mm.h | 3 +++ 2 files changed, 6 insertions(+) diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c index f394d6627a..15edaca227 100644 --- a/xen/common/page_alloc.c +++ b/xen/common/page_alloc.c @@ -1536,6 +1536,9 @@ void __init free_staticmem_pages(struct page_info *pg, unsigned long nr_mfns, /* TODO: asynchronous scrubbing for pages of static memory. */ scrub_one_page(pg); } + + /* In case initializing page of static memory, mark it PGC_reserved. */ + pg[i].count_info |= PGC_reserved; } } #endif diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h index ded74d29da..7b5e7b7f69 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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