From: Penny Zheng <penny.zheng@arm.com>
To: <xen-devel@lists.xenproject.org>, <sstabellini@kernel.org>,
<julien@xen.org>
Cc: <Bertrand.Marquis@arm.com>, <Penny.Zheng@arm.com>,
<Wei.Chen@arm.com>, <nd@arm.com>
Subject: [PATCH 04/10] xen/arm: static memory initialization
Date: Tue, 18 May 2021 05:21:07 +0000 [thread overview]
Message-ID: <20210518052113.725808-5-penny.zheng@arm.com> (raw)
In-Reply-To: <20210518052113.725808-1-penny.zheng@arm.com>
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
3. follow the same cache coherency policy in free_heap_pages
4. scrub the page in need
Signed-off-by: Penny Zheng <penny.zheng@arm.com>
---
xen/arch/arm/setup.c | 2 ++
xen/common/page_alloc.c | 70 +++++++++++++++++++++++++++++++++++++++++
xen/include/xen/mm.h | 3 ++
3 files changed, 75 insertions(+)
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 444dbbd676..f80162c478 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -818,6 +818,8 @@ static void __init setup_mm(void)
setup_frametable_mappings(ram_start, ram_end);
max_page = PFN_DOWN(ram_end);
+
+ init_staticmem_pages();
}
#endif
diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
index ace6333c18..58b53c6ac2 100644
--- 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
/*
* Comma-separated list of hexadecimal page numbers containing bad bytes.
@@ -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)
+{
+ mfn_t mfn = page_to_mfn(pg);
+ int i;
+
+ for ( i = 0; i < nr_pfns; i++ )
+ {
+ switch ( pg[i].count_info & PGC_state )
+ {
+ case PGC_state_inuse:
+ BUG_ON(pg[i].count_info & PGC_broken);
+ /* Make it free and reserved. */
+ pg[i].count_info = PGC_state_free | PGC_reserved;
+ break;
+
+ default:
+ printk(XENLOG_ERR
+ "Page state shall be only in PGC_state_inuse. "
+ "pg[%u] MFN %"PRI_mfn" count_info=%#lx tlbflush_timestamp=%#x.\n",
+ i, mfn_x(mfn) + i,
+ pg[i].count_info,
+ pg[i].tlbflush_timestamp);
+ BUG();
+ }
+
+ /*
+ * Follow the same cache coherence scheme in free_heap_pages.
+ * If a page has no owner it will need no safety TLB flush.
+ */
+ pg[i].u.free.need_tlbflush = (page_get_owner(&pg[i]) != NULL);
+ if ( pg[i].u.free.need_tlbflush )
+ page_set_tlbflush_timestamp(&pg[i]);
+
+ /* This page is not a guest frame any more. */
+ page_set_owner(&pg[i], NULL);
+ set_gpfn_from_mfn(mfn_x(mfn) + i, INVALID_M2P_ENTRY);
+
+ if ( need_scrub )
+ scrub_one_page(&pg[i]);
+ }
+}
/*
* Following rules applied for page offline:
@@ -1828,6 +1874,30 @@ static void init_heap_pages(
}
}
+/* Equivalent of init_heap_pages to do static memory initialization */
+void __init init_staticmem_pages(void)
+{
+ int bank;
+
+ /*
+ * TODO: Considering NUMA-support scenario.
+ */
+ for ( bank = 0 ; bank < bootinfo.static_mem.nr_banks; bank++ )
+ {
+ paddr_t bank_start = bootinfo.static_mem.bank[bank].start;
+ paddr_t bank_size = bootinfo.static_mem.bank[bank].size;
+ paddr_t bank_end = bank_start + bank_size;
+
+ bank_start = round_pgup(bank_start);
+ bank_end = round_pgdown(bank_end);
+ if ( bank_end <= bank_start )
+ return;
+
+ free_staticmem_pages(maddr_to_page(bank_start),
+ (bank_end - bank_start) >> PAGE_SHIFT, false);
+ }
+}
+
static unsigned long avail_heap_pages(
unsigned int zone_lo, unsigned int zone_hi, unsigned int node)
{
diff --git a/xen/include/xen/mm.h b/xen/include/xen/mm.h
index 667f9dac83..8b1a2207b2 100644
--- a/xen/include/xen/mm.h
+++ b/xen/include/xen/mm.h
@@ -85,6 +85,9 @@ bool scrub_free_pages(void);
} while ( false )
#define FREE_XENHEAP_PAGE(p) FREE_XENHEAP_PAGES(p, 0)
+/* Static Memory */
+void init_staticmem_pages(void);
+
/* Map machine page range in Xen virtual address space. */
int map_pages_to_xen(
unsigned long virt,
--
2.25.1
next prev parent reply other threads:[~2021-05-18 5:22 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 ` Penny Zheng [this message]
2021-05-18 7:15 ` [PATCH 04/10] xen/arm: static memory initialization Jan Beulich
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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