[Xen-devel] [PATCH] MAX_DMADOM_PFN

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

made MAX_DMADOM_PFN page size aware.
4K page size was assumed, however it is not true for xen/ia64.
It should also be possible for arch dependent code to override it.

# HG changeset patch
# User yamahata@xxxxxxxxxxxxx
# Node ID 0c2b703c79333c01e4cccef1fbac1d01c6c7daa7
# Parent  5b004f4e76cf90ef6f7155a4822e63b9e33cf7d8
made MAX_DMADOM_PFN aware of page size.
4K page size was assumed. It is not true for xen/ia64 by default.
It should also be possible for arch dependent code to override it.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>

diff -r 5b004f4e76cf -r 0c2b703c7933 xen/common/page_alloc.c
--- a/xen/common/page_alloc.c   Wed Jan 25 23:35:22 2006 +0100
+++ b/xen/common/page_alloc.c   Thu Jan 26 10:09:39 2006 +0900
@@ -216,7 +216,9 @@
 #define NR_ZONES    3
 
 
-#define MAX_DMADOM_PFN 0x7FFFFUL /* 31 addressable bits */
+#ifndef MAX_DMADOM_PFN /* arch-depedent code can override */
+#define MAX_DMADOM_PFN (0x7FFFFFFFUL >> PAGE_SHIFT) /* 31 addressable bits */
+#endif
 #define pfn_dom_zone_type(_pfn)                                 \
     (((_pfn) <= MAX_DMADOM_PFN) ? MEMZONE_DMADOM : MEMZONE_DOM)
 

-- 
yamahata

Attachment: max_domain_pfn.patch
Description: Text document

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