[Xen-changelog] [xen-3.4-testing] x86 numa: Fix post-boot ACPI SLIT accesses.

["Xen patchbot-3.4-testing" <patchbot-3.4-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1267132031 0
# Node ID 3b046e77d9b4aa588c0a04f2ed706a04a3c78a6a
# Parent  4f3f443df642e5009dbb31c072dc764171d99050
x86 numa: Fix post-boot ACPI SLIT accesses.

Signed-off-by: Nitin A Kamble <nitin.a.kamble@xxxxxxxxx>
xen-unstable changeset:   20983:94535cc63835
xen-unstable date:        Thu Feb 25 21:03:26 2010 +0000
---
 xen/arch/x86/srat.c |   19 +++++++++++++++----
 1 files changed, 15 insertions(+), 4 deletions(-)

diff -r 4f3f443df642 -r 3b046e77d9b4 xen/arch/x86/srat.c
--- a/xen/arch/x86/srat.c       Thu Feb 25 21:06:36 2010 +0000
+++ b/xen/arch/x86/srat.c       Thu Feb 25 21:07:11 2010 +0000
@@ -124,11 +124,22 @@ static __init int slit_valid(struct acpi
 /* Callback for SLIT parsing */
 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 {
+#ifdef CONFIG_X86_64
+       unsigned long mfn;
        if (!slit_valid(slit)) {
-               printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
-               return;
-       }
-       acpi_slit = slit;
+               printk(KERN_INFO "ACPI: SLIT table looks invalid. "
+                      "Not used.\n");
+               return;
+       }
+       mfn = alloc_boot_pages(PFN_UP(slit->header.length), 1);
+       if (!mfn) {
+               printk(KERN_ERR "ACPI: Unable to allocate memory for "
+                      "saving ACPI SLIT numa information.\n");
+               return;
+       }
+       acpi_slit = mfn_to_virt(mfn);
+       memcpy(acpi_slit, slit, slit->header.length);
+#endif
 }
 
 /* Callback for Proximity Domain -> LAPIC mapping */

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