[Xen-devel] RE: [PATCH] to fix ACPI slit table access at runtime

["Kamble, Nitin A" <nitin.a.kamble@xxxxxxxxx>]

Keir, here is the updated patch. I did verify that it is giving right 
information at runtime.

Thanks & Regards,
Nitin

Signed-Off-By: Nitin A Kamble <nitin.a.kamble@xxxxxxxxx>

diff -r b474725a242b xen/arch/x86/srat.c
--- a/xen/arch/x86/srat.c       Thu Feb 25 07:50:38 2010 -0800
+++ b/xen/arch/x86/srat.c       Fri Feb 26 02:41:27 2010 -0800
@@ -140,11 +140,21 @@
 /* Callback for SLIT parsing */
 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
 {
+       unsigned long mfn, pages;
        if (!slit_valid(slit)) {
                printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
                return;
        }
-       acpi_slit = slit;
+       pages = slit->header.length >> PAGE_SHIFT;
+       if (!pages)
+               pages = 1;
+       mfn = alloc_boot_pages(pages , 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);
 }
 
 /* Callback for Proximity Domain -> LAPIC mapping */

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