[Xen-devel] [PATCH RFC 03/18] xen/arm: allow to allocate 1/128/256/512 Mb memory chunks

[Andrii Anisov <andrii.anisov@xxxxxxxxxxxxxxx>]

From: Andrii Tseglytskyi <andrii.tseglytskyi@xxxxxxxxxxxxxxx>

This is done to allow possibility of having 1 to 1 memory mapping chunks
with size 1/128/256/512 Mb what can sagnificantly decrease time of memory
allocation and fragmentation for 1-to-1 mapped domains.

Signed-off-by: Andrii Tseglytskyi <andrii.tseglytskyi@xxxxxxxxxxxxxxx>
Signed-off-by: Iurii Konovalenko <iurii.konovalenko@xxxxxxxxxxxxxxx>
---
 tools/libxc/xc_dom_arm.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/tools/libxc/xc_dom_arm.c b/tools/libxc/xc_dom_arm.c
index aeaba54..5ee8eef 100644
--- a/tools/libxc/xc_dom_arm.c
+++ b/tools/libxc/xc_dom_arm.c
@@ -33,7 +33,11 @@
 #define LPAE_SHIFT 9
 
 #define PFN_4K_SHIFT  (0)
+#define PFN_1M_SHIFT  (PFN_4K_SHIFT + 8)
 #define PFN_2M_SHIFT  (PFN_4K_SHIFT+LPAE_SHIFT)
+#define PFN_128M_SHIFT  (PFN_2M_SHIFT + 6)
+#define PFN_256M_SHIFT  (PFN_128M_SHIFT + 1)
+#define PFN_512M_SHIFT  (PFN_256M_SHIFT + 1)
 #define PFN_1G_SHIFT  (PFN_2M_SHIFT+LPAE_SHIFT)
 #define PFN_512G_SHIFT (PFN_1G_SHIFT+LPAE_SHIFT)
 
@@ -359,11 +363,31 @@ static int populate_guest_memory(struct xc_dom_image *dom,
         if ( rc < 0 ) break;
         if ( rc > 0 ) continue;
 
+        rc = populate_one_size(dom, PFN_512M_SHIFT,
+                               base_pfn + pfn, &allocsz, extents);
+        if ( rc < 0 ) break;
+        if ( rc > 0 ) continue;
+
+        rc = populate_one_size(dom, PFN_256M_SHIFT,
+                               base_pfn + pfn, &allocsz, extents);
+        if ( rc < 0 ) break;
+        if ( rc > 0 ) continue;
+
+        rc = populate_one_size(dom, PFN_128M_SHIFT,
+                               base_pfn + pfn, &allocsz, extents);
+        if ( rc < 0 ) break;
+        if ( rc > 0 ) continue;
+
         rc = populate_one_size(dom, PFN_2M_SHIFT,
                                base_pfn + pfn, &allocsz, extents);
         if ( rc < 0 ) break;
         if ( rc > 0 ) continue;
 
+        rc = populate_one_size(dom, PFN_1M_SHIFT,
+                               base_pfn + pfn, &allocsz, extents);
+        if ( rc < 0 ) break;
+        if ( rc > 0 ) continue;
+
         rc = populate_one_size(dom, PFN_4K_SHIFT,
                                base_pfn + pfn, &allocsz, extents);
         if ( rc < 0 ) break;
-- 
2.8.2


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