| Message ID | 20210728102758.3269446-7-penny.zheng@arm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Domain on Static Allocation | expand |
Hi Penny, On 28/07/2021 11:27, Penny Zheng wrote: > 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@arm.com> I think this want to be folded in patch #7. Cheers,
Hi Julien > -----Original Message----- > From: Julien Grall <julien@xen.org> > Sent: Friday, August 13, 2021 8:22 PM > To: Penny Zheng <Penny.Zheng@arm.com>; xen-devel@lists.xenproject.org; > sstabellini@kernel.org > Cc: Bertrand Marquis <Bertrand.Marquis@arm.com>; Wei Chen > <Wei.Chen@arm.com>; nd <nd@arm.com> > Subject: Re: [PATCH V4 06/10] xen/arm: introduce PGC_reserved > > Hi Penny, > > On 28/07/2021 11:27, Penny Zheng wrote: > > 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@arm.com> > > I think this want to be folded in patch #7. > Ok. Will do. > Cheers, > > -- Cheers, -- Penny Zheng > Julien Grall
diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c index 2acb73e323..f51e406401 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)
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@arm.com> --- xen/common/page_alloc.c | 3 +++ xen/include/asm-arm/mm.h | 3 +++ 2 files changed, 6 insertions(+)