[Xen-changelog] Here is a patch to get Xen running on a 32-way Unisys ES7000 system.

[BitKeeper Bot <riel@xxxxxxxxxxx>]

ChangeSet 1.1338.1.2, 2005/04/20 14:57:00+01:00, kaf24@xxxxxxxxxxxxxxxxxxxx

        Here is a patch to get Xen running on a 32-way Unisys ES7000 system.
        Please note that this patch alone is not sufficient to do this. You will
        also need the clustered APIC patch that I will be submitting soon. But
        since this patch was to a general area in Xen I decided to submit it
        separately. I think this patch will be required to get Xen running on
        any system that has more than 16 CPUs.
        Signed-off-by: Aravindh Puthiyaparambil 
<aravindh.puthiyaparambil@xxxxxxxxxx>



 asm-x86/config.h     |    6 +++++-
 public/arch-x86_32.h |    5 ++++-
 public/arch-x86_64.h |    5 ++++-
 3 files changed, 13 insertions(+), 3 deletions(-)


diff -Nru a/xen/include/asm-x86/config.h b/xen/include/asm-x86/config.h
--- a/xen/include/asm-x86/config.h      2005-04-20 10:04:31 -04:00
+++ b/xen/include/asm-x86/config.h      2005-04-20 10:04:31 -04:00
@@ -55,7 +55,11 @@
 
 #define OPT_CONSOLE_STR "com1,vga"
 
-#define NR_CPUS 16
+/*
+ * If you increase this value, please update NR_RESERVED_GDT_ENTRIES
+ * in include/public/arch-x86_xx.h
+ */
+#define NR_CPUS 32
 
 /* Linkage for x86 */
 #define __ALIGN .align 16,0x90
diff -Nru a/xen/include/public/arch-x86_32.h b/xen/include/public/arch-x86_32.h
--- a/xen/include/public/arch-x86_32.h  2005-04-20 10:04:31 -04:00
+++ b/xen/include/public/arch-x86_32.h  2005-04-20 10:04:31 -04:00
@@ -33,10 +33,13 @@
  * in their ABI. These hard-coded values are always near the start of the GDT,
  * so Xen places itself out of the way.
  * 
+ * NR_RESERVED_GDT_ENTRIES is (8 + 2 * NR_CPUS) Please update this value if 
+ * you increase NR_CPUS or add another GDT entry to gdt_table in x86_32.S
+ *
  * NB. The reserved range is inclusive (that is, both FIRST_RESERVED_GDT_ENTRY
  * and LAST_RESERVED_GDT_ENTRY are reserved).
  */
-#define NR_RESERVED_GDT_ENTRIES    40
+#define NR_RESERVED_GDT_ENTRIES    72
 #define FIRST_RESERVED_GDT_ENTRY   256
 #define LAST_RESERVED_GDT_ENTRY    \
   (FIRST_RESERVED_GDT_ENTRY + NR_RESERVED_GDT_ENTRIES - 1)
diff -Nru a/xen/include/public/arch-x86_64.h b/xen/include/public/arch-x86_64.h
--- a/xen/include/public/arch-x86_64.h  2005-04-20 10:04:31 -04:00
+++ b/xen/include/public/arch-x86_64.h  2005-04-20 10:04:31 -04:00
@@ -27,10 +27,13 @@
  * in their ABI. These hard-coded values are always near the start of the GDT,
  * so Xen places itself out of the way.
  * 
+ * NR_RESERVED_GDT_ENTRIES is (8 + 4 * NR_CPUS) Please update this value if 
+ * you increase NR_CPUS or add another GDT entry to gdt_table in boot/x86_64.S
+ * 
  * NB. The reserved range is inclusive (that is, both FIRST_RESERVED_GDT_ENTRY
  * and LAST_RESERVED_GDT_ENTRY are reserved).
  */
-#define NR_RESERVED_GDT_ENTRIES    72
+#define NR_RESERVED_GDT_ENTRIES    136
 #define FIRST_RESERVED_GDT_ENTRY   256
 #define LAST_RESERVED_GDT_ENTRY    \
   (FIRST_RESERVED_GDT_ENTRY + NR_RESERVED_GDT_ENTRIES - 1)

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