From: Jan Beulich <jbeulich@suse.com>
To: Penny Zheng <penny.zheng@arm.com>
Cc: Bertrand.Marquis@arm.com, Wei.Chen@arm.com, nd@arm.com,
xen-devel@lists.xenproject.org, sstabellini@kernel.org,
julien@xen.org
Subject: Re: [PATCH 04/10] xen/arm: static memory initialization
Date: Tue, 18 May 2021 09:15:38 +0200 [thread overview]
Message-ID: <dbffa647-37e2-93b6-4041-a1344aeb1837@suse.com> (raw)
In-Reply-To: <20210518052113.725808-5-penny.zheng@arm.com>
On 18.05.2021 07:21, Penny Zheng wrote:
> This patch introduces static memory initialization, during system RAM boot up.
>
> New func init_staticmem_pages is the equivalent of init_heap_pages, responsible
> for static memory initialization.
>
> Helper func free_staticmem_pages is the equivalent of free_heap_pages, to free
> nr_pfns pages of static memory.
> For each page, it includes the following steps:
> 1. change page state from in-use(also initialization state) to free state and
> grant PGC_reserved.
> 2. set its owner NULL and make sure this page is not a guest frame any more
But isn't the goal (as per the previous patch) to associate such pages
with a _specific_ domain?
> --- a/xen/common/page_alloc.c
> +++ b/xen/common/page_alloc.c
> @@ -150,6 +150,9 @@
> #define p2m_pod_offline_or_broken_hit(pg) 0
> #define p2m_pod_offline_or_broken_replace(pg) BUG_ON(pg != NULL)
> #endif
> +#ifdef CONFIG_ARM_64
> +#include <asm/setup.h>
> +#endif
Whatever it is that's needed from this header suggests the code won't
build for other architectures. I think init_staticmem_pages() in its
current shape shouldn't live in this (common) file.
> @@ -1512,6 +1515,49 @@ static void free_heap_pages(
> spin_unlock(&heap_lock);
> }
>
> +/* Equivalent of free_heap_pages to free nr_pfns pages of static memory. */
> +static void free_staticmem_pages(struct page_info *pg, unsigned long nr_pfns,
> + bool need_scrub)
Right now this function gets called only from an __init one. Unless
it is intended to gain further callers, it should be marked __init
itself then. Otherwise it should be made sure that other
architectures don't include this (dead there) code.
> +{
> + mfn_t mfn = page_to_mfn(pg);
> + int i;
This type doesn't fit nr_pfns'es.
Jan
next prev parent reply other threads:[~2021-05-18 7:15 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-18 5:21 [PATCH 00/10] Domain on Static Allocation Penny Zheng
2021-05-18 5:21 ` [PATCH 01/10] xen/arm: introduce domain " Penny Zheng
2021-05-18 8:58 ` Julien Grall
2021-05-19 2:22 ` Penny Zheng
2021-05-19 18:27 ` Julien Grall
2021-05-20 6:07 ` Penny Zheng
2021-05-20 8:50 ` Julien Grall
2021-06-02 10:09 ` Penny Zheng
2021-06-03 9:09 ` Julien Grall
2021-06-03 21:32 ` Stefano Stabellini
2021-06-03 22:07 ` Julien Grall
2021-06-03 23:55 ` Stefano Stabellini
2021-06-04 4:00 ` Penny Zheng
2021-06-05 2:00 ` Stefano Stabellini
2021-06-07 18:09 ` Julien Grall
2021-06-09 9:56 ` Bertrand Marquis
2021-06-09 10:47 ` Julien Grall
2021-06-15 6:08 ` Penny Zheng
2021-06-17 11:22 ` Julien Grall
2021-05-18 5:21 ` [PATCH 02/10] xen/arm: handle static memory in dt_unreserved_regions Penny Zheng
2021-05-18 9:04 ` Julien Grall
2021-05-18 5:21 ` [PATCH 03/10] xen/arm: introduce PGC_reserved Penny Zheng
2021-05-18 9:45 ` Julien Grall
2021-05-19 3:16 ` Penny Zheng
2021-05-19 9:49 ` Jan Beulich
2021-05-19 19:49 ` Julien Grall
2021-05-20 7:05 ` Jan Beulich
2021-05-19 19:46 ` Julien Grall
2021-05-20 6:19 ` Penny Zheng
2021-05-20 8:40 ` Penny Zheng
2021-05-20 8:59 ` Julien Grall
2021-05-20 9:27 ` Jan Beulich
2021-05-20 9:45 ` Julien Grall
2021-05-18 5:21 ` [PATCH 04/10] xen/arm: static memory initialization Penny Zheng
2021-05-18 7:15 ` Jan Beulich [this message]
2021-05-18 9:51 ` Penny Zheng
2021-05-18 10:43 ` Jan Beulich
2021-05-20 9:04 ` Penny Zheng
2021-05-20 9:32 ` Jan Beulich
2021-05-18 10:00 ` Julien Grall
2021-05-18 10:01 ` Julien Grall
2021-05-19 5:02 ` Penny Zheng
2021-05-18 5:21 ` [PATCH 05/10] xen/arm: introduce alloc_staticmem_pages Penny Zheng
2021-05-18 7:24 ` Jan Beulich
2021-05-18 9:30 ` Penny Zheng
2021-05-18 10:09 ` Julien Grall
2021-05-18 10:15 ` Julien Grall
2021-05-19 5:23 ` Penny Zheng
2021-05-24 10:10 ` Penny Zheng
2021-05-24 10:24 ` Julien Grall
2021-05-18 5:21 ` [PATCH 06/10] xen: replace order with nr_pfns in assign_pages for better compatibility Penny Zheng
2021-05-18 7:27 ` Jan Beulich
2021-05-18 9:11 ` Penny Zheng
2021-05-18 10:20 ` Julien Grall
2021-05-19 5:35 ` Penny Zheng
2021-05-18 5:21 ` [PATCH 07/10] xen/arm: intruduce alloc_domstatic_pages Penny Zheng
2021-05-18 7:34 ` Jan Beulich
2021-05-18 8:57 ` Penny Zheng
2021-05-18 11:23 ` Jan Beulich
2021-05-21 6:41 ` Penny Zheng
2021-05-21 7:09 ` Jan Beulich
2021-06-03 2:44 ` Penny Zheng
2021-05-18 12:13 ` Julien Grall
2021-05-19 7:52 ` Penny Zheng
2021-05-19 20:01 ` Julien Grall
2021-05-18 10:30 ` Julien Grall
2021-05-19 6:03 ` Penny Zheng
2021-05-18 5:21 ` [PATCH 08/10] xen/arm: introduce reserved_page_list Penny Zheng
2021-05-18 7:39 ` Jan Beulich
2021-05-18 8:38 ` Penny Zheng
2021-05-18 11:24 ` Jan Beulich
2021-05-19 6:46 ` Penny Zheng
2021-05-18 11:02 ` Julien Grall
2021-05-19 6:43 ` Penny Zheng
2021-05-18 5:21 ` [PATCH 09/10] xen/arm: parse `xen,static-mem` info during domain construction Penny Zheng
2021-05-18 12:09 ` Julien Grall
2021-05-19 7:58 ` Penny Zheng
2021-05-18 5:21 ` [PATCH 10/10] xen/arm: introduce allocate_static_memory Penny Zheng
2021-05-18 12:05 ` Julien Grall
2021-05-19 7:27 ` Penny Zheng
2021-05-19 20:10 ` Julien Grall
2021-05-20 6:29 ` Penny Zheng
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