xen-ia64-devel
[Xen-ia64-devel] [patch 1/8] Kexec: offsets for EFI runtime regions
This is used by paches that move the EFI runtime regions into what is
normally guest space. A description of why this mapping is made is
included in the patch that makes the mapping.
Cc: Tristan Gingold <tgingold@xxxxxxx>
Cc: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
Sat, 8 Sep 2007 06:06:30 +0200
Tristan Gingold has rasied the point that mapping EFI memory as
facilitated by this and subsequent patches may cause a security
problem, allowing VTI domains to access memory that they shouldn't.
This needs further analysis.
Index: xen-unstable.hg/xen/include/asm-ia64/xensystem.h
===================================================================
--- xen-unstable.hg.orig/xen/include/asm-ia64/xensystem.h 2007-09-03
10:21:50.000000000 +0900
+++ xen-unstable.hg/xen/include/asm-ia64/xensystem.h 2007-09-03
18:52:11.000000000 +0900
@@ -33,6 +33,12 @@
#define KERNEL_START 0xf000000004000000
#define GATE_ADDR KERNEL_START
+/* In order for Kexec between Xen and Linux to work EFI needs
+ * to be mapped into the same place by both. It seems most convenient
+ * to make Xen do the dirty work here */
+#define __IA64_EFI_UNCACHED_OFFSET 0xc000000000000000UL
+#define __IA64_EFI_CACHED_OFFSET 0xe000000000000000UL
+
#define IS_VMM_ADDRESS(addr) ((((addr) >> 60) ^ ((addr) >> 59)) & 1)
#endif // _ASM_IA64_XENSYSTEM_H
--
--
Horms
H: http://www.vergenet.net/~horms/
W: http://www.valinux.co.jp/en/
_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel
|
|
|