From: Penny Zheng <penny.zheng@arm.com>
To: <xen-devel@lists.xenproject.org>, <sstabellini@kernel.org>,
<julien@xen.org>, <jbeulich@suse.com>
Cc: <Bertrand.Marquis@arm.com>, <Penny.Zheng@arm.com>, <Wei.Chen@arm.com>
Subject: [PATCH 7/9] xen/arm: take care of concurrency on static memory allocation
Date: Mon, 7 Jun 2021 02:43:16 +0000 [thread overview]
Message-ID: <20210607024318.3988467-8-penny.zheng@arm.com> (raw)
In-Reply-To: <20210607024318.3988467-1-penny.zheng@arm.com>
In the future, user may want to allocate static memory at runtime,
and it is quite important to get the code protected from concurrent
access.
Re-use heap_lock to protect concurrent access in alloc_staticmem_pages.
Signed-off-by: Penny Zheng <penny.zheng@arm.com>
---
changes v2:
- new commit
---
xen/common/page_alloc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
index a0eea5f1a4..c6ccfc3216 100644
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -1087,6 +1087,9 @@ static struct page_info *alloc_staticmem_pages(unsigned long nr_mfns,
nr_mfns, mfn_x(smfn));
return NULL;
}
+
+ spin_lock(&heap_lock);
+
pg = mfn_to_page(smfn);
for ( i = 0; i < nr_mfns; i++ )
@@ -1127,6 +1130,8 @@ static struct page_info *alloc_staticmem_pages(unsigned long nr_mfns,
!(memflags & MEMF_no_icache_flush));
}
+ spin_unlock(&heap_lock);
+
if ( need_tlbflush )
filtered_flush_tlb_mask(tlbflush_timestamp);
--
2.25.1
next prev parent reply other threads:[~2021-06-07 2:44 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-07 2:43 [PATCH V2 0/9] Domain on Static Allocation Penny Zheng
2021-06-07 2:43 ` [PATCH 1/9] xen/arm: introduce domain " Penny Zheng
2021-06-07 2:43 ` [PATCH 2/9] xen/arm: introduce PGC_reserved Penny Zheng
2021-06-30 17:44 ` Julien Grall
2021-07-05 3:09 ` Penny Zheng
2021-06-07 2:43 ` [PATCH 3/9] xen/arm: introduce CONFIG_STATIC_ALLOCATION Penny Zheng
2021-06-07 6:17 ` Jan Beulich
2021-06-30 17:45 ` Julien Grall
2021-07-05 3:16 ` Penny Zheng
2021-06-07 2:43 ` [PATCH 4/9] xen/arm: static memory initialization Penny Zheng
2021-06-10 9:35 ` Jan Beulich
2021-06-30 17:46 ` Julien Grall
2021-07-05 5:22 ` Penny Zheng
2021-07-05 7:14 ` Penny Zheng
2021-07-05 7:50 ` Jan Beulich
2021-07-05 9:19 ` Penny Zheng
2021-07-05 7:48 ` Jan Beulich
2021-06-30 18:09 ` Julien Grall
2021-07-05 7:28 ` Penny Zheng
2021-07-06 9:09 ` Julien Grall
2021-07-06 9:20 ` Penny Zheng
2021-07-06 9:26 ` Julien Grall
2021-06-07 2:43 ` [PATCH 5/9] xen: introduce assign_pages_nr Penny Zheng
2021-06-10 9:49 ` Jan Beulich
2021-06-30 18:29 ` Julien Grall
2021-07-01 8:26 ` Jan Beulich
2021-07-01 9:24 ` Julien Grall
2021-07-01 10:13 ` Jan Beulich
2021-06-07 2:43 ` [PATCH 6/9] xen/arm: introduce alloc_staticmem_pages and alloc_domstatic_pages Penny Zheng
2021-06-10 10:23 ` Jan Beulich
2021-07-06 5:58 ` Penny Zheng
2021-07-06 6:53 ` Jan Beulich
2021-07-06 9:39 ` Julien Grall
2021-07-06 9:59 ` Jan Beulich
2021-07-06 10:31 ` Julien Grall
2021-07-08 9:09 ` Penny Zheng
2021-07-08 10:06 ` Jan Beulich
2021-07-08 11:07 ` Penny Zheng
2021-06-07 2:43 ` Penny Zheng [this message]
2021-06-10 10:53 ` [PATCH 7/9] xen/arm: take care of concurrency on static memory allocation Jan Beulich
2021-06-07 2:43 ` [PATCH 8/9] xen/arm: check `xen,static-mem` property during domain construction Penny Zheng
2021-07-03 13:26 ` Julien Grall
2021-07-06 6:31 ` Penny Zheng
2021-07-06 6:57 ` Jan Beulich
2021-07-06 7:35 ` Penny Zheng
2021-07-06 9:22 ` Julien Grall
2021-06-07 2:43 ` [PATCH 9/9] xen/arm: introduce allocate_static_memory Penny Zheng
2021-07-03 14:18 ` Julien Grall
2021-07-06 7:30 ` Penny Zheng
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